2010-06-21 Rodrigo Kumpera <rkumpera@novell.com>

[mono.git] / mono / metadata / class.c

/*
 * class.c: Class management for the Mono runtime
 *
 * Author:
 *   Miguel de Icaza (miguel@ximian.com)
 *
 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
 */
#include <config.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include <glib.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if !HOST_WIN32
#include <mono/io-layer/atomic.h>
#endif
#include <mono/metadata/image.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/metadata.h>
#include <mono/metadata/metadata-internals.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/class-internals.h>
#include <mono/metadata/object.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/reflection.h>
#include <mono/metadata/exception.h>
#include <mono/metadata/security-manager.h>
#include <mono/metadata/security-core-clr.h>
#include <mono/metadata/attrdefs.h>
#include <mono/metadata/gc-internal.h>
#include <mono/metadata/verify-internals.h>
#include <mono/metadata/mono-debug.h>
#include <mono/utils/mono-counters.h>
#include <mono/utils/mono-string.h>
#include <mono/utils/mono-error-internals.h>

MonoStats mono_stats;

gboolean mono_print_vtable = FALSE;

/* Statistics */
guint32 inflated_classes, inflated_classes_size, inflated_methods_size;
guint32 classes_size, class_ext_size;

/* Function supplied by the runtime to find classes by name using information from the AOT file */
static MonoGetClassFromName get_class_from_name = NULL;

static MonoClass * mono_class_create_from_typedef (MonoImage *image, guint32 type_token);
static gboolean mono_class_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res);
static gboolean can_access_type (MonoClass *access_klass, MonoClass *member_klass);
static MonoMethod* find_method_in_metadata (MonoClass *klass, const char *name, int param_count, int flags);
static int generic_array_methods (MonoClass *class);
static void setup_generic_array_ifaces (MonoClass *class, MonoClass *iface, MonoMethod **methods, int pos);

static MonoMethod* mono_class_get_virtual_methods (MonoClass* klass, gpointer *iter);
static char* mono_assembly_name_from_token (MonoImage *image, guint32 type_token);
static gboolean mono_class_is_variant_compatible (MonoClass *klass, MonoClass *oklass);


void (*mono_debugger_class_init_func) (MonoClass *klass) = NULL;
void (*mono_debugger_class_loaded_methods_func) (MonoClass *klass) = NULL;

/*
 * mono_class_from_typeref:
 * @image: a MonoImage
 * @type_token: a TypeRef token
 *
 * Creates the MonoClass* structure representing the type defined by
 * the typeref token valid inside @image.
 * Returns: the MonoClass* representing the typeref token, NULL ifcould
 * not be loaded.
 */
MonoClass *
mono_class_from_typeref (MonoImage *image, guint32 type_token)
{
        guint32 cols [MONO_TYPEREF_SIZE];
        MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEREF];
        guint32 idx;
        const char *name, *nspace;
        MonoClass *res;
        MonoImage *module;
        
        mono_metadata_decode_row (t, (type_token&0xffffff)-1, cols, MONO_TYPEREF_SIZE);

        name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
        nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);

        idx = cols [MONO_TYPEREF_SCOPE] >> MONO_RESOLTION_SCOPE_BITS;
        switch (cols [MONO_TYPEREF_SCOPE] & MONO_RESOLTION_SCOPE_MASK) {
        case MONO_RESOLTION_SCOPE_MODULE:
                if (!idx)
                        g_error ("null ResolutionScope not yet handled");
                /* a typedef in disguise */
                return mono_class_from_name (image, nspace, name);
        case MONO_RESOLTION_SCOPE_MODULEREF:
                module = mono_image_load_module (image, idx);
                if (module)
                        return mono_class_from_name (module, nspace, name);
                else {
                        char *msg = g_strdup_printf ("%s%s%s", nspace, nspace [0] ? "." : "", name);
                        char *human_name;
                        
                        human_name = mono_stringify_assembly_name (&image->assembly->aname);
                        mono_loader_set_error_type_load (msg, human_name);
                        g_free (msg);
                        g_free (human_name);
                
                        return NULL;
                }
        case MONO_RESOLTION_SCOPE_TYPEREF: {
                MonoClass *enclosing;
                GList *tmp;

                if (idx == mono_metadata_token_index (type_token)) {
                        mono_loader_set_error_bad_image (g_strdup_printf ("Image %s with self-referencing typeref token %08x.", image->name, type_token));
                        return NULL;
                }

                enclosing = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | idx);
                if (!enclosing)
                        return NULL;

                if (enclosing->nested_classes_inited && enclosing->ext) {
                        /* Micro-optimization: don't scan the metadata tables if enclosing is already inited */
                        for (tmp = enclosing->ext->nested_classes; tmp; tmp = tmp->next) {
                                res = tmp->data;
                                if (strcmp (res->name, name) == 0)
                                        return res;
                        }
                } else {
                        /* Don't call mono_class_init as we might've been called by it recursively */
                        int i = mono_metadata_nesting_typedef (enclosing->image, enclosing->type_token, 1);
                        while (i) {
                                guint32 class_nested = mono_metadata_decode_row_col (&enclosing->image->tables [MONO_TABLE_NESTEDCLASS], i - 1, MONO_NESTED_CLASS_NESTED);
                                guint32 string_offset = mono_metadata_decode_row_col (&enclosing->image->tables [MONO_TABLE_TYPEDEF], class_nested - 1, MONO_TYPEDEF_NAME);
                                const char *nname = mono_metadata_string_heap (enclosing->image, string_offset);

                                if (strcmp (nname, name) == 0)
                                        return mono_class_create_from_typedef (enclosing->image, MONO_TOKEN_TYPE_DEF | class_nested);

                                i = mono_metadata_nesting_typedef (enclosing->image, enclosing->type_token, i + 1);
                        }
                }
                g_warning ("TypeRef ResolutionScope not yet handled (%d) for %s.%s in image %s", idx, nspace, name, image->name);
                return NULL;
        }
        case MONO_RESOLTION_SCOPE_ASSEMBLYREF:
                break;
        }

        if (idx > image->tables [MONO_TABLE_ASSEMBLYREF].rows) {
                mono_loader_set_error_bad_image (g_strdup_printf ("Image %s with invalid assemblyref token %08x.", image->name, idx));
                return NULL;
        }

        if (!image->references || !image->references [idx - 1])
                mono_assembly_load_reference (image, idx - 1);
        g_assert (image->references [idx - 1]);

        /* If the assembly did not load, register this as a type load exception */
        if (image->references [idx - 1] == REFERENCE_MISSING){
                MonoAssemblyName aname;
                char *human_name;
                
                mono_assembly_get_assemblyref (image, idx - 1, &aname);
                human_name = mono_stringify_assembly_name (&aname);
                mono_loader_set_error_assembly_load (human_name, image->assembly ? image->assembly->ref_only : FALSE);
                g_free (human_name);
                
                return NULL;
        }

        return mono_class_from_name (image->references [idx - 1]->image, nspace, name);
}


static void *
mono_image_memdup (MonoImage *image, void *data, guint size)
{
        void *res = mono_image_alloc (image, size);
        memcpy (res, data, size);
        return res;
}
        
/* Copy everything mono_metadata_free_array free. */
MonoArrayType *
mono_dup_array_type (MonoImage *image, MonoArrayType *a)
{
        if (image) {
                a = mono_image_memdup (image, a, sizeof (MonoArrayType));
                if (a->sizes)
                        a->sizes = mono_image_memdup (image, a->sizes, a->numsizes * sizeof (int));
                if (a->lobounds)
                        a->lobounds = mono_image_memdup (image, a->lobounds, a->numlobounds * sizeof (int));
        } else {
                a = g_memdup (a, sizeof (MonoArrayType));
                if (a->sizes)
                        a->sizes = g_memdup (a->sizes, a->numsizes * sizeof (int));
                if (a->lobounds)
                        a->lobounds = g_memdup (a->lobounds, a->numlobounds * sizeof (int));
        }
        return a;
}

/* Copy everything mono_metadata_free_method_signature free. */
MonoMethodSignature*
mono_metadata_signature_deep_dup (MonoImage *image, MonoMethodSignature *sig)
{
        int i;
        
        sig = mono_metadata_signature_dup_full (image, sig);
        
        sig->ret = mono_metadata_type_dup (image, sig->ret);
        for (i = 0; i < sig->param_count; ++i)
                sig->params [i] = mono_metadata_type_dup (image, sig->params [i]);
        
        return sig;
}

static void
_mono_type_get_assembly_name (MonoClass *klass, GString *str)
{
        MonoAssembly *ta = klass->image->assembly;

        g_string_append_printf (
                str, ", %s, Version=%d.%d.%d.%d, Culture=%s, PublicKeyToken=%s%s",
                ta->aname.name,
                ta->aname.major, ta->aname.minor, ta->aname.build, ta->aname.revision,
                ta->aname.culture && *ta->aname.culture? ta->aname.culture: "neutral",
                ta->aname.public_key_token [0] ? (char *)ta->aname.public_key_token : "null",
                (ta->aname.flags & ASSEMBLYREF_RETARGETABLE_FLAG) ? ", Retargetable=Yes" : "");
}

static inline void
mono_type_name_check_byref (MonoType *type, GString *str)
{
        if (type->byref)
                g_string_append_c (str, '&');
}

static void
mono_type_get_name_recurse (MonoType *type, GString *str, gboolean is_recursed,
                            MonoTypeNameFormat format)
{
        MonoClass *klass;
        
        switch (type->type) {
        case MONO_TYPE_ARRAY: {
                int i, rank = type->data.array->rank;
                MonoTypeNameFormat nested_format;

                nested_format = format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED ?
                        MONO_TYPE_NAME_FORMAT_FULL_NAME : format;

                mono_type_get_name_recurse (
                        &type->data.array->eklass->byval_arg, str, FALSE, nested_format);
                g_string_append_c (str, '[');
                if (rank == 1)
                        g_string_append_c (str, '*');
                for (i = 1; i < rank; i++)
                        g_string_append_c (str, ',');
                g_string_append_c (str, ']');
                
                mono_type_name_check_byref (type, str);

                if (format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)
                        _mono_type_get_assembly_name (type->data.array->eklass, str);
                break;
        }
        case MONO_TYPE_SZARRAY: {
                MonoTypeNameFormat nested_format;

                nested_format = format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED ?
                        MONO_TYPE_NAME_FORMAT_FULL_NAME : format;

                mono_type_get_name_recurse (
                        &type->data.klass->byval_arg, str, FALSE, nested_format);
                g_string_append (str, "[]");
                
                mono_type_name_check_byref (type, str);

                if (format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)
                        _mono_type_get_assembly_name (type->data.klass, str);
                break;
        }
        case MONO_TYPE_PTR: {
                MonoTypeNameFormat nested_format;

                nested_format = format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED ?
                        MONO_TYPE_NAME_FORMAT_FULL_NAME : format;

                mono_type_get_name_recurse (
                        type->data.type, str, FALSE, nested_format);
                g_string_append_c (str, '*');

                mono_type_name_check_byref (type, str);

                if (format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)
                        _mono_type_get_assembly_name (mono_class_from_mono_type (type->data.type), str);
                break;
        }
        case MONO_TYPE_VAR:
        case MONO_TYPE_MVAR:
                if (!mono_generic_param_info (type->data.generic_param))
                        g_string_append_printf (str, "%s%d", type->type == MONO_TYPE_VAR ? "!" : "!!", type->data.generic_param->num);
                else
                        g_string_append (str, mono_generic_param_info (type->data.generic_param)->name);

                mono_type_name_check_byref (type, str);

                break;
        default:
                klass = mono_class_from_mono_type (type);
                if (klass->nested_in) {
                        mono_type_get_name_recurse (
                                &klass->nested_in->byval_arg, str, TRUE, format);
                        if (format == MONO_TYPE_NAME_FORMAT_IL)
                                g_string_append_c (str, '.');
                        else
                                g_string_append_c (str, '+');
                } else if (*klass->name_space) {
                        g_string_append (str, klass->name_space);
                        g_string_append_c (str, '.');
                }
                if (format == MONO_TYPE_NAME_FORMAT_IL) {
                        char *s = strchr (klass->name, '`');
                        int len = s ? s - klass->name : strlen (klass->name);

                        g_string_append_len (str, klass->name, len);
                } else
                        g_string_append (str, klass->name);
                if (is_recursed)
                        break;
                if (klass->generic_class) {
                        MonoGenericClass *gclass = klass->generic_class;
                        MonoGenericInst *inst = gclass->context.class_inst;
                        MonoTypeNameFormat nested_format;
                        int i;

                        nested_format = format == MONO_TYPE_NAME_FORMAT_FULL_NAME ?
                                MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED : format;

                        if (format == MONO_TYPE_NAME_FORMAT_IL)
                                g_string_append_c (str, '<');
                        else
                                g_string_append_c (str, '[');
                        for (i = 0; i < inst->type_argc; i++) {
                                MonoType *t = inst->type_argv [i];

                                if (i)
                                        g_string_append_c (str, ',');
                                if ((nested_format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED) &&
                                    (t->type != MONO_TYPE_VAR) && (type->type != MONO_TYPE_MVAR))
                                        g_string_append_c (str, '[');
                                mono_type_get_name_recurse (inst->type_argv [i], str, FALSE, nested_format);
                                if ((nested_format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED) &&
                                    (t->type != MONO_TYPE_VAR) && (type->type != MONO_TYPE_MVAR))
                                        g_string_append_c (str, ']');
                        }
                        if (format == MONO_TYPE_NAME_FORMAT_IL) 
                                g_string_append_c (str, '>');
                        else
                                g_string_append_c (str, ']');
                } else if (klass->generic_container &&
                           (format != MONO_TYPE_NAME_FORMAT_FULL_NAME) &&
                           (format != MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)) {
                        int i;

                        if (format == MONO_TYPE_NAME_FORMAT_IL) 
                                g_string_append_c (str, '<');
                        else
                                g_string_append_c (str, '[');
                        for (i = 0; i < klass->generic_container->type_argc; i++) {
                                if (i)
                                        g_string_append_c (str, ',');
                                g_string_append (str, mono_generic_container_get_param_info (klass->generic_container, i)->name);
                        }
                        if (format == MONO_TYPE_NAME_FORMAT_IL) 
                                g_string_append_c (str, '>');
                        else
                                g_string_append_c (str, ']');
                }

                mono_type_name_check_byref (type, str);

                if ((format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED) &&
                    (type->type != MONO_TYPE_VAR) && (type->type != MONO_TYPE_MVAR))
                        _mono_type_get_assembly_name (klass, str);
                break;
        }
}

/**
 * mono_type_get_name_full:
 * @type: a type
 * @format: the format for the return string.
 *
 * 
 * Returns: the string representation in a number of formats:
 *
 * if format is MONO_TYPE_NAME_FORMAT_REFLECTION, the return string is
 * returned in the formatrequired by System.Reflection, this is the
 * inverse of mono_reflection_parse_type ().
 *
 * if format is MONO_TYPE_NAME_FORMAT_IL, it returns a syntax that can
 * be used by the IL assembler.
 *
 * if format is MONO_TYPE_NAME_FORMAT_FULL_NAME
 *
 * if format is MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED
 */
char*
mono_type_get_name_full (MonoType *type, MonoTypeNameFormat format)
{
        GString* result;

        result = g_string_new ("");

        mono_type_get_name_recurse (type, result, FALSE, format);

        return g_string_free (result, FALSE);
}

/**
 * mono_type_get_full_name:
 * @class: a class
 *
 * Returns: the string representation for type as required by System.Reflection.
 * The inverse of mono_reflection_parse_type ().
 */
char *
mono_type_get_full_name (MonoClass *class)
{
        return mono_type_get_name_full (mono_class_get_type (class), MONO_TYPE_NAME_FORMAT_REFLECTION);
}

/**
 * mono_type_get_name:
 * @type: a type
 *
 * Returns: the string representation for type as it would be represented in IL code.
 */
char*
mono_type_get_name (MonoType *type)
{
        return mono_type_get_name_full (type, MONO_TYPE_NAME_FORMAT_IL);
}

/*
 * mono_type_get_underlying_type:
 * @type: a type
 *
 * Returns: the MonoType for the underlying integer type if @type
 * is an enum and byref is false, otherwise the type itself.
 */
MonoType*
mono_type_get_underlying_type (MonoType *type)
{
        if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype && !type->byref)
                return mono_class_enum_basetype (type->data.klass);
        if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype && !type->byref)
                return mono_class_enum_basetype (type->data.generic_class->container_class);
        return type;
}

/*
 * mono_class_is_open_constructed_type:
 * @type: a type
 *
 * Returns TRUE if type represents a generics open constructed type
 * (not all the type parameters required for the instantiation have
 * been provided).
 */
gboolean
mono_class_is_open_constructed_type (MonoType *t)
{
        switch (t->type) {
        case MONO_TYPE_VAR:
        case MONO_TYPE_MVAR:
                return TRUE;
        case MONO_TYPE_SZARRAY:
                return mono_class_is_open_constructed_type (&t->data.klass->byval_arg);
        case MONO_TYPE_ARRAY:
                return mono_class_is_open_constructed_type (&t->data.array->eklass->byval_arg);
        case MONO_TYPE_PTR:
                return mono_class_is_open_constructed_type (t->data.type);
        case MONO_TYPE_GENERICINST:
                return t->data.generic_class->context.class_inst->is_open;
        default:
                return FALSE;
        }
}

static MonoType*
inflate_generic_type (MonoImage *image, MonoType *type, MonoGenericContext *context, MonoError *error)
{
        mono_error_init (error);

        switch (type->type) {
        case MONO_TYPE_MVAR: {
                MonoType *nt;
                int num = mono_type_get_generic_param_num (type);
                MonoGenericInst *inst = context->method_inst;
                if (!inst || !inst->type_argv)
                        return NULL;
                if (num >= inst->type_argc) {
                        MonoGenericParamInfo *info = mono_generic_param_info (type->data.generic_param);
                        mono_error_set_bad_image (error, image, "MVAR %d (%s) cannot be expanded in this context with %d instantiations",
                                num, info ? info->name : "", inst->type_argc);
                        return NULL;
                }

                /*
                 * Note that the VAR/MVAR cases are different from the rest.  The other cases duplicate @type,
                 * while the VAR/MVAR duplicates a type from the context.  So, we need to ensure that the
                 * ->byref and ->attrs from @type are propagated to the returned type.
                 */
                nt = mono_metadata_type_dup (image, inst->type_argv [num]);
                nt->byref = type->byref;
                nt->attrs = type->attrs;
                return nt;
        }
        case MONO_TYPE_VAR: {
                MonoType *nt;
                int num = mono_type_get_generic_param_num (type);
                MonoGenericInst *inst = context->class_inst;
                if (!inst)
                        return NULL;
                if (num >= inst->type_argc) {
                        MonoGenericParamInfo *info = mono_generic_param_info (type->data.generic_param);
                        mono_error_set_bad_image (error, image, "VAR %d (%s) cannot be expanded in this context with %d instantiations",
                                num, info ? info->name : "", inst->type_argc);
                        return NULL;
                }
                nt = mono_metadata_type_dup (image, inst->type_argv [num]);
                nt->byref = type->byref;
                nt->attrs = type->attrs;
                return nt;
        }
        case MONO_TYPE_SZARRAY: {
                MonoClass *eclass = type->data.klass;
                MonoType *nt, *inflated = inflate_generic_type (NULL, &eclass->byval_arg, context, error);
                if (!inflated || !mono_error_ok (error))
                        return NULL;
                nt = mono_metadata_type_dup (image, type);
                nt->data.klass = mono_class_from_mono_type (inflated);
                mono_metadata_free_type (inflated);
                return nt;
        }
        case MONO_TYPE_ARRAY: {
                MonoClass *eclass = type->data.array->eklass;
                MonoType *nt, *inflated = inflate_generic_type (NULL, &eclass->byval_arg, context, error);
                if (!inflated || !mono_error_ok (error))
                        return NULL;
                nt = mono_metadata_type_dup (image, type);
                nt->data.array->eklass = mono_class_from_mono_type (inflated);
                mono_metadata_free_type (inflated);
                return nt;
        }
        case MONO_TYPE_GENERICINST: {
                MonoGenericClass *gclass = type->data.generic_class;
                MonoGenericInst *inst;
                MonoType *nt;
                if (!gclass->context.class_inst->is_open)
                        return NULL;

                inst = mono_metadata_inflate_generic_inst (gclass->context.class_inst, context, error);
                if (!mono_error_ok (error))
                        return NULL;
                if (inst != gclass->context.class_inst)
                        gclass = mono_metadata_lookup_generic_class (gclass->container_class, inst, gclass->is_dynamic);

                if (gclass == type->data.generic_class)
                        return NULL;

                nt = mono_metadata_type_dup (image, type);
                nt->data.generic_class = gclass;
                return nt;
        }
        case MONO_TYPE_CLASS:
        case MONO_TYPE_VALUETYPE: {
                MonoClass *klass = type->data.klass;
                MonoGenericContainer *container = klass->generic_container;
                MonoGenericInst *inst;
                MonoGenericClass *gclass = NULL;
                MonoType *nt;

                if (!container)
                        return NULL;

                /* We can't use context->class_inst directly, since it can have more elements */
                inst = mono_metadata_inflate_generic_inst (container->context.class_inst, context, error);
                if (!mono_error_ok (error))
                        return NULL;
                if (inst == container->context.class_inst)
                        return NULL;

                gclass = mono_metadata_lookup_generic_class (klass, inst, klass->image->dynamic);

                nt = mono_metadata_type_dup (image, type);
                nt->type = MONO_TYPE_GENERICINST;
                nt->data.generic_class = gclass;
                return nt;
        }
        default:
                return NULL;
        }
        return NULL;
}

MonoGenericContext *
mono_generic_class_get_context (MonoGenericClass *gclass)
{
        return &gclass->context;
}

MonoGenericContext *
mono_class_get_context (MonoClass *class)
{
       return class->generic_class ? mono_generic_class_get_context (class->generic_class) : NULL;
}

/*
 * mono_class_get_generic_container:
 *
 *   Return the generic container of KLASS which should be a generic type definition.
 */
MonoGenericContainer*
mono_class_get_generic_container (MonoClass *klass)
{
        g_assert (klass->is_generic);

        return klass->generic_container;
}

/*
 * mono_class_get_generic_class:
 *
 *   Return the MonoGenericClass of KLASS, which should be a generic instance.
 */
MonoGenericClass*
mono_class_get_generic_class (MonoClass *klass)
{
        g_assert (klass->is_inflated);

        return klass->generic_class;
}

/*
 * mono_class_inflate_generic_type_with_mempool:
 * @mempool: a mempool
 * @type: a type
 * @context: a generics context
 * @error: error context
 *
 * The same as mono_class_inflate_generic_type, but allocates the MonoType
 * from mempool if it is non-NULL.  If it is NULL, the MonoType is
 * allocated on the heap and is owned by the caller.
 * The returned type can potentially be the same as TYPE, so it should not be
 * modified by the caller, and it should be freed using mono_metadata_free_type ().
 */
MonoType*
mono_class_inflate_generic_type_with_mempool (MonoImage *image, MonoType *type, MonoGenericContext *context, MonoError *error)
{
        MonoType *inflated = NULL;
        mono_error_init (error);

        if (context)
                inflated = inflate_generic_type (image, type, context, error);
        if (!mono_error_ok (error))
                return NULL;

        if (!inflated) {
                MonoType *shared = mono_metadata_get_shared_type (type);

                if (shared) {
                        return shared;
                } else {
                        return mono_metadata_type_dup (image, type);
                }
        }

        mono_stats.inflated_type_count++;
        return inflated;
}

/*
 * mono_class_inflate_generic_type:
 * @type: a type
 * @context: a generics context
 *
 * If @type is a generic type and @context is not NULL, instantiate it using the 
 * generics context @context.
 *
 * Returns: the instantiated type or a copy of @type. The returned MonoType is allocated
 * on the heap and is owned by the caller. Returns NULL on error.
 *
 * @deprecated Please use mono_class_inflate_generic_type_checked instead
 */
MonoType*
mono_class_inflate_generic_type (MonoType *type, MonoGenericContext *context)
{
        MonoError error;
        MonoType *result;
        result = mono_class_inflate_generic_type_checked (type, context, &error);

        if (!mono_error_ok (&error)) {
                mono_error_cleanup (&error);
                return NULL;
        }
        return result;
}

/*
 * mono_class_inflate_generic_type:
 * @type: a type
 * @context: a generics context
 * @error: error context to use
 *
 * If @type is a generic type and @context is not NULL, instantiate it using the 
 * generics context @context.
 *
 * Returns: the instantiated type or a copy of @type. The returned MonoType is allocated
 * on the heap and is owned by the caller.
 */
MonoType*
mono_class_inflate_generic_type_checked (MonoType *type, MonoGenericContext *context, MonoError *error)
{
        return mono_class_inflate_generic_type_with_mempool (NULL, type, context, error);
}

/*
 * mono_class_inflate_generic_type_no_copy:
 *
 *   Same as inflate_generic_type_with_mempool, but return TYPE if no inflation
 * was done.
 */
static MonoType*
mono_class_inflate_generic_type_no_copy (MonoImage *image, MonoType *type, MonoGenericContext *context, MonoError *error)
{
        MonoType *inflated = NULL; 

        mono_error_init (error);
        if (context) {
                inflated = inflate_generic_type (image, type, context, error);
                if (!mono_error_ok (error))
                        return NULL;
        }

        if (!inflated)
                return type;

        mono_stats.inflated_type_count++;
        return inflated;
}

static MonoClass*
mono_class_inflate_generic_class_checked (MonoClass *gklass, MonoGenericContext *context, MonoError *error)
{
        MonoClass *res;
        MonoType *inflated;

        inflated = mono_class_inflate_generic_type_checked (&gklass->byval_arg, context, error);
        if (!mono_error_ok (error))
                return NULL;

        res = mono_class_from_mono_type (inflated);
        mono_metadata_free_type (inflated);

        return res;
}
/*
 * mono_class_inflate_generic_class:
 *
 *   Inflate the class GKLASS with CONTEXT.
 */
MonoClass*
mono_class_inflate_generic_class (MonoClass *gklass, MonoGenericContext *context)
{
        MonoError error;
        MonoClass *res;

        res = mono_class_inflate_generic_class_checked (gklass, context, &error);
        g_assert (mono_error_ok (&error)); /*FIXME proper error handling*/

        return res;
}



static MonoGenericContext
inflate_generic_context (MonoGenericContext *context, MonoGenericContext *inflate_with, MonoError *error)
{
        MonoGenericInst *class_inst = NULL;
        MonoGenericInst *method_inst = NULL;
        MonoGenericContext res = { NULL, NULL };

        mono_error_init (error);

        if (context->class_inst) {
                class_inst = mono_metadata_inflate_generic_inst (context->class_inst, inflate_with, error);
                if (!mono_error_ok (error))
                        goto fail;
        }

        if (context->method_inst) {
                method_inst = mono_metadata_inflate_generic_inst (context->method_inst, inflate_with, error);
                if (!mono_error_ok (error))
                        goto fail;
        }

        res.class_inst = class_inst;
        res.method_inst = method_inst;
fail:
        return res;
}

/*
 * mono_class_inflate_generic_method:
 * @method: a generic method
 * @context: a generics context
 *
 * Instantiate the generic method @method using the generics context @context.
 *
 * Returns: the new instantiated method
 */
MonoMethod *
mono_class_inflate_generic_method (MonoMethod *method, MonoGenericContext *context)
{
        return mono_class_inflate_generic_method_full (method, NULL, context);
}

/**
 * mono_class_inflate_generic_method_full:
 *
 * Instantiate method @method with the generic context @context.
 * BEWARE: All non-trivial fields are invalid, including klass, signature, and header.
 *         Use mono_method_signature () and mono_method_get_header () to get the correct values.
 */
MonoMethod*
mono_class_inflate_generic_method_full (MonoMethod *method, MonoClass *klass_hint, MonoGenericContext *context)
{
        MonoError error;
        MonoMethod *res = mono_class_inflate_generic_method_full_checked (method, klass_hint, context, &error);
        if (!mono_error_ok (&error))
                /*FIXME do proper error handling - on this case, kill this function. */
                g_error ("Could not inflate generic method due to %s", mono_error_get_message (&error)); 

        return res;
}

/**
 * mono_class_inflate_generic_method_full_checked:
 * Same as mono_class_inflate_generic_method_full but return failure using @error.
 */
MonoMethod*
mono_class_inflate_generic_method_full_checked (MonoMethod *method, MonoClass *klass_hint, MonoGenericContext *context, MonoError *error)
{
        MonoMethod *result;
        MonoMethodInflated *iresult, *cached;
        MonoMethodSignature *sig;
        MonoGenericContext tmp_context;
        gboolean is_mb_open = FALSE;

        mono_error_init (error);

        /* The `method' has already been instantiated before => we need to peel out the instantiation and create a new context */
        while (method->is_inflated) {
                MonoGenericContext *method_context = mono_method_get_context (method);
                MonoMethodInflated *imethod = (MonoMethodInflated *) method;

                tmp_context = inflate_generic_context (method_context, context, error);
                if (!mono_error_ok (error))
                        return NULL;
                context = &tmp_context;

                if (mono_metadata_generic_context_equal (method_context, context))
                        return method;

                method = imethod->declaring;
        }

        if (!method->is_generic && !method->klass->generic_container)
                return method;

        /*
         * The reason for this hack is to fix the behavior of inflating generic methods that come from a MethodBuilder.
         * What happens is that instantiating a generic MethodBuilder with its own arguments should create a diferent object.
         * This is opposite to the way non-SRE MethodInfos behave.
         * 
         * This happens, for example, when we want to emit a recursive generic method. Given the following C# code:
         * 
         * void Example<T> () {
         *    Example<T> ();
         * }
         *  
         * In Example, the method token must be encoded as: "void Example<!!0>()"
         * 
         * The reference to the first generic argument, "!!0", must be explicit otherwise it won't be inflated
         * properly. To get that we need to inflate the MethodBuilder with its own arguments.
         * 
         * On the other hand, inflating a non-SRE generic method with its own arguments should
         * return itself. For example:
         * 
         * MethodInfo m = ... //m is a generic method definition
         * MethodInfo res = m.MakeGenericMethod (m.GetGenericArguments ());
         * res == m
         *
         * To allow such scenarios we must allow inflation of MethodBuilder to happen in a diferent way than
         * what happens with regular methods.
         * 
         * There is one last touch to this madness, once a TypeBuilder is finished, IOW CreateType() is called,
         * everything should behave like a regular type or method.
         * 
         */
        is_mb_open = method->is_generic &&
                method->klass->image->dynamic && !method->klass->wastypebuilder && /* that is a MethodBuilder from an unfinished TypeBuilder */
                context->method_inst == mono_method_get_generic_container (method)->context.method_inst; /* and it's been instantiated with its own arguments.  */

        iresult = g_new0 (MonoMethodInflated, 1);
        iresult->context = *context;
        iresult->declaring = method;
        iresult->method.method.is_mb_open = is_mb_open;

        if (!context->method_inst && method->is_generic)
                iresult->context.method_inst = mono_method_get_generic_container (method)->context.method_inst;

        if (!context->class_inst) {
                g_assert (!iresult->declaring->klass->generic_class);
                if (iresult->declaring->klass->generic_container)
                        iresult->context.class_inst = iresult->declaring->klass->generic_container->context.class_inst;
                else if (iresult->declaring->klass->generic_class)
                        iresult->context.class_inst = iresult->declaring->klass->generic_class->context.class_inst;
        }

        mono_loader_lock ();
        cached = mono_method_inflated_lookup (iresult, FALSE);
        if (cached) {
                mono_loader_unlock ();
                g_free (iresult);
                return (MonoMethod*)cached;
        }

        mono_stats.inflated_method_count++;

        inflated_methods_size += sizeof (MonoMethodInflated);

        sig = mono_method_signature (method);
        if (!sig) {
                char *name = mono_type_get_full_name (method->klass);
                mono_error_set_bad_image (error, method->klass->image, "Could not resolve signature of method %s:%s", name, method->name);
                g_free (name);
                goto fail;
        }

        if (sig->pinvoke) {
                memcpy (&iresult->method.pinvoke, method, sizeof (MonoMethodPInvoke));
        } else {
                memcpy (&iresult->method.method, method, sizeof (MonoMethod));
        }

        result = (MonoMethod *) iresult;
        result->is_inflated = TRUE;
        result->is_generic = FALSE;
        result->sre_method = FALSE;
        result->signature = NULL;
        result->is_mb_open = is_mb_open;

        if (!context->method_inst) {
                /* Set the generic_container of the result to the generic_container of method */
                MonoGenericContainer *generic_container = mono_method_get_generic_container (method);

                if (generic_container) {
                        result->is_generic = 1;
                        mono_method_set_generic_container (result, generic_container);
                }
        }

        if (!klass_hint || !klass_hint->generic_class ||
            klass_hint->generic_class->container_class != method->klass ||
            klass_hint->generic_class->context.class_inst != context->class_inst)
                klass_hint = NULL;

        if (method->klass->generic_container)
                result->klass = klass_hint;

        if (!result->klass) {
                MonoType *inflated = inflate_generic_type (NULL, &method->klass->byval_arg, context, error);
                if (!mono_error_ok (error)) 
                        goto fail;

                result->klass = inflated ? mono_class_from_mono_type (inflated) : method->klass;
                if (inflated)
                        mono_metadata_free_type (inflated);
        }

        mono_method_inflated_lookup (iresult, TRUE);
        mono_loader_unlock ();
        return result;

fail:
        mono_loader_unlock ();
        g_free (iresult);
        return NULL;
}

/**
 * mono_get_inflated_method:
 *
 * Obsolete.  We keep it around since it's mentioned in the public API.
 */
MonoMethod*
mono_get_inflated_method (MonoMethod *method)
{
        return method;
}

/*
 * mono_method_get_context_general:
 * @method: a method
 * @uninflated: handle uninflated methods?
 *
 * Returns the generic context of a method or NULL if it doesn't have
 * one.  For an inflated method that's the context stored in the
 * method.  Otherwise it's in the method's generic container or in the
 * generic container of the method's class.
 */
MonoGenericContext*
mono_method_get_context_general (MonoMethod *method, gboolean uninflated)
{
        if (method->is_inflated) {
                MonoMethodInflated *imethod = (MonoMethodInflated *) method;
                return &imethod->context;
        }
        if (!uninflated)
                return NULL;
        if (method->is_generic)
                return &(mono_method_get_generic_container (method)->context);
        if (method->klass->generic_container)
                return &method->klass->generic_container->context;
        return NULL;
}

/*
 * mono_method_get_context:
 * @method: a method
 *
 * Returns the generic context for method if it's inflated, otherwise
 * NULL.
 */
MonoGenericContext*
mono_method_get_context (MonoMethod *method)
{
        return mono_method_get_context_general (method, FALSE);
}

/*
 * mono_method_get_generic_container:
 *
 *   Returns the generic container of METHOD, which should be a generic method definition.
 * Returns NULL if METHOD is not a generic method definition.
 * LOCKING: Acquires the loader lock.
 */
MonoGenericContainer*
mono_method_get_generic_container (MonoMethod *method)
{
        MonoGenericContainer *container;

        if (!method->is_generic)
                return NULL;

        container = mono_image_property_lookup (method->klass->image, method, MONO_METHOD_PROP_GENERIC_CONTAINER);
        g_assert (container);

        return container;
}

/*
 * mono_method_set_generic_container:
 *
 *   Sets the generic container of METHOD to CONTAINER.
 * LOCKING: Acquires the loader lock.
 */
void
mono_method_set_generic_container (MonoMethod *method, MonoGenericContainer* container)
{
        g_assert (method->is_generic);

        mono_image_property_insert (method->klass->image, method, MONO_METHOD_PROP_GENERIC_CONTAINER, container);
}

/** 
 * mono_class_find_enum_basetype:
 * @class: The enum class
 *
 *   Determine the basetype of an enum by iterating through its fields. We do this
 * in a separate function since it is cheaper than calling mono_class_setup_fields.
 */
static MonoType*
mono_class_find_enum_basetype (MonoClass *class)
{
        MonoGenericContainer *container = NULL;
        MonoImage *m = class->image; 
        const int top = class->field.count;
        int i;

        g_assert (class->enumtype);

        if (class->generic_container)
                container = class->generic_container;
        else if (class->generic_class) {
                MonoClass *gklass = class->generic_class->container_class;

                container = gklass->generic_container;
                g_assert (container);
        }

        /*
         * Fetch all the field information.
         */
        for (i = 0; i < top; i++){
                const char *sig;
                guint32 cols [MONO_FIELD_SIZE];
                int idx = class->field.first + i;
                MonoType *ftype;

                /* class->field.first and idx points into the fieldptr table */
                mono_metadata_decode_table_row (m, MONO_TABLE_FIELD, idx, cols, MONO_FIELD_SIZE);

                if (cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_STATIC) //no need to decode static fields
                        continue;

                if (!mono_verifier_verify_field_signature (class->image, cols [MONO_FIELD_SIGNATURE], NULL))
                        return NULL;

                sig = mono_metadata_blob_heap (m, cols [MONO_FIELD_SIGNATURE]);
                mono_metadata_decode_value (sig, &sig);
                /* FIELD signature == 0x06 */
                if (*sig != 0x06)
                        return NULL;

                ftype = mono_metadata_parse_type_full (m, container, MONO_PARSE_FIELD, cols [MONO_FIELD_FLAGS], sig + 1, &sig);
                if (!ftype)
                        return NULL;
                if (class->generic_class) {
                        //FIXME do we leak here?
                        ftype = mono_class_inflate_generic_type (ftype, mono_class_get_context (class));
                        ftype->attrs = cols [MONO_FIELD_FLAGS];
                }

                return ftype;
        }

        return NULL;
}

/*
 * Checks for MonoClass::exception_type without resolving all MonoType's into MonoClass'es
 */
static gboolean
mono_type_has_exceptions (MonoType *type)
{
        switch (type->type) {
        case MONO_TYPE_CLASS:
        case MONO_TYPE_VALUETYPE:
        case MONO_TYPE_SZARRAY:
                return type->data.klass->exception_type;
        case MONO_TYPE_ARRAY:
                return type->data.array->eklass->exception_type;
        case MONO_TYPE_GENERICINST:
                return mono_generic_class_get_class (type->data.generic_class)->exception_type;
        }
        return FALSE;
}

/*
 * mono_class_alloc:
 *
 *   Allocate memory for some data belonging to CLASS, either from its image's mempool,
 * or from the heap.
 */
static gpointer
mono_class_alloc (MonoClass *class, int size)
{
        if (class->generic_class)
                /*
                 * This should be freed in free_generic_class () in metadata.c.
                 * FIXME: It would be better to allocate this from the image set mempool, by
                 * adding an image_set field to MonoGenericClass.
                 */
           return g_malloc (size);
        else
                return mono_image_alloc (class->image, size);
}

static gpointer
mono_class_alloc0 (MonoClass *class, int size)
{
        gpointer res;

        res = mono_class_alloc (class, size);
        memset (res, 0, size);
        return res;
}

#define mono_class_new0(class,struct_type, n_structs)           \
    ((struct_type *) mono_class_alloc0 ((class), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))

/** 
 * mono_class_setup_fields:
 * @class: The class to initialize
 *
 * Initializes the class->fields.
 * LOCKING: Assumes the loader lock is held.
 */
static void
mono_class_setup_fields (MonoClass *class)
{
        MonoError error;
        MonoImage *m = class->image; 
        int top = class->field.count;
        guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
        int i, blittable = TRUE;
        guint32 real_size = 0;
        guint32 packing_size = 0;
        gboolean explicit_size;
        MonoClassField *field;
        MonoGenericContainer *container = NULL;
        MonoClass *gtd = class->generic_class ? mono_class_get_generic_type_definition (class) : NULL;

        if (class->size_inited)
                return;

        if (class->generic_class && class->generic_class->container_class->image->dynamic && !class->generic_class->container_class->wastypebuilder) {
                /*
                 * This happens when a generic instance of an unfinished generic typebuilder
                 * is used as an element type for creating an array type. We can't initialize
                 * the fields of this class using the fields of gklass, since gklass is not
                 * finished yet, fields could be added to it later.
                 */
                return;
        }

        if (gtd) {
                mono_class_setup_fields (gtd);
                if (gtd->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        return;
                }

                top = gtd->field.count;
                class->field.first = gtd->field.first;
                class->field.count = gtd->field.count;
        }

        class->instance_size = 0;
        if (!class->rank)
                class->sizes.class_size = 0;

        if (class->parent) {
                /* For generic instances, class->parent might not have been initialized */
                mono_class_init (class->parent);
                if (!class->parent->size_inited) {
                        mono_class_setup_fields (class->parent);
                        if (class->parent->exception_type) {
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                return;
                        }
                }
                class->instance_size += class->parent->instance_size;
                class->min_align = class->parent->min_align;
                /* we use |= since it may have been set already */
                class->has_references |= class->parent->has_references;
                blittable = class->parent->blittable;
        } else {
                class->instance_size = sizeof (MonoObject);
                class->min_align = 1;
        }

        /* We can't really enable 16 bytes alignment until the GC supports it.
        The whole layout/instance size code must be reviewed because we do alignment calculation in terms of the
        boxed instance, which leads to unexplainable holes at the beginning of an object embedding a simd type.
        Bug #506144 is an example of this issue.

         if (class->simd_type)
                class->min_align = 16;
         */
        /* Get the real size */
        explicit_size = mono_metadata_packing_from_typedef (class->image, class->type_token, &packing_size, &real_size);

        if (explicit_size) {
                g_assert ((packing_size & 0xfffffff0) == 0);
                class->packing_size = packing_size;
                real_size += class->instance_size;
        }

        if (!top) {
                if (explicit_size && real_size) {
                        class->instance_size = MAX (real_size, class->instance_size);
                }
                class->size_inited = 1;
                class->blittable = blittable;
                return;
        }

        if (layout == TYPE_ATTRIBUTE_AUTO_LAYOUT)
                blittable = FALSE;

        /* Prevent infinite loops if the class references itself */
        class->size_inited = 1;

        class->fields = mono_class_alloc0 (class, sizeof (MonoClassField) * top);

        if (class->generic_container) {
                container = class->generic_container;
        } else if (gtd) {
                container = gtd->generic_container;
                g_assert (container);
        }

        /*
         * Fetch all the field information.
         */
        for (i = 0; i < top; i++){
                int idx = class->field.first + i;
                field = &class->fields [i];

                field->parent = class;

                if (gtd) {
                        MonoClassField *gfield = &gtd->fields [i];

                        field->name = mono_field_get_name (gfield);
                        /*This memory must come from the image mempool as we don't have a chance to free it.*/
                        field->type = mono_class_inflate_generic_type_no_copy (class->image, gfield->type, mono_class_get_context (class), &error);
                        if (!mono_error_ok (&error)) {
                                char *err_msg = g_strdup_printf ("Could not load field %d type due to: %s", i, mono_error_get_message (&error));
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, err_msg);
                                g_free (err_msg);
                                mono_error_cleanup (&error);
                                return;
                        }
                        g_assert (field->type->attrs == gfield->type->attrs);
                        if (mono_field_is_deleted (field))
                                continue;
                        field->offset = gfield->offset;
                } else {
                        const char *sig;
                        guint32 cols [MONO_FIELD_SIZE];

                        /* class->field.first and idx points into the fieldptr table */
                        mono_metadata_decode_table_row (m, MONO_TABLE_FIELD, idx, cols, MONO_FIELD_SIZE);
                        /* The name is needed for fieldrefs */
                        field->name = mono_metadata_string_heap (m, cols [MONO_FIELD_NAME]);
                        if (!mono_verifier_verify_field_signature (class->image, cols [MONO_FIELD_SIGNATURE], NULL)) {
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                break;
                        }
                        sig = mono_metadata_blob_heap (m, cols [MONO_FIELD_SIGNATURE]);
                        mono_metadata_decode_value (sig, &sig);
                        /* FIELD signature == 0x06 */
                        g_assert (*sig == 0x06);
                        field->type = mono_metadata_parse_type_full (m, container, MONO_PARSE_FIELD, cols [MONO_FIELD_FLAGS], sig + 1, &sig);
                        if (!field->type) {
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                break;
                        }
                        if (mono_field_is_deleted (field))
                                continue;
                        if (layout == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT) {
                                guint32 offset;
                                mono_metadata_field_info (m, idx, &offset, NULL, NULL);
                                field->offset = offset;

                                if (field->offset == (guint32)-1 && !(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
                                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Missing field layout info for %s", field->name));
                                        break;
                                }
                                if (field->offset < -1) { /*-1 is used to encode special static fields */
                                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Invalid negative field offset %d for %s", field->offset, field->name));
                                        break;
                                }
                        }
                }

                /* Only do these checks if we still think this type is blittable */
                if (blittable && !(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
                        if (field->type->byref || MONO_TYPE_IS_REFERENCE (field->type)) {
                                blittable = FALSE;
                        } else {
                                MonoClass *field_class = mono_class_from_mono_type (field->type);
                                if (field_class) {
                                        mono_class_setup_fields (field_class);
                                        if (field_class->exception_type) {
                                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                                break;
                                        }
                                }
                                if (!field_class || !field_class->blittable)
                                        blittable = FALSE;
                        }
                }

                if (class->enumtype && !(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
                        class->cast_class = class->element_class = mono_class_from_mono_type (field->type);
                        blittable = class->element_class->blittable;
                }

                if (mono_type_has_exceptions (field->type)) {
                        char *class_name = mono_type_get_full_name (class);
                        char *type_name = mono_type_full_name (field->type);

                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        g_warning ("Invalid type %s for instance field %s:%s", type_name, class_name, field->name);
                        g_free (class_name);
                        g_free (type_name);
                        break;
                }
                /* The def_value of fields is compute lazily during vtable creation */
        }

        if (class == mono_defaults.string_class)
                blittable = FALSE;

        class->blittable = blittable;

        if (class->enumtype && !mono_class_enum_basetype (class)) {
                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                return;
        }
        if (explicit_size && real_size) {
                class->instance_size = MAX (real_size, class->instance_size);
        }

        if (class->exception_type)
                return;
        mono_class_layout_fields (class);

        /*valuetypes can't be neither bigger than 1Mb or empty. */
        if (class->valuetype && (class->instance_size <= 0 || class->instance_size > (0x100000 + sizeof (MonoObject))))
                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
}

/** 
 * mono_class_setup_fields_locking:
 * @class: The class to initialize
 *
 * Initializes the class->fields array of fields.
 * Aquires the loader lock.
 */
static void
mono_class_setup_fields_locking (MonoClass *class)
{
        mono_loader_lock ();
        mono_class_setup_fields (class);
        mono_loader_unlock ();
}

/*
 * mono_class_has_references:
 *
 *   Returns whenever @klass->has_references is set, initializing it if needed.
 * Aquires the loader lock.
 */
static gboolean
mono_class_has_references (MonoClass *klass)
{
        if (klass->init_pending) {
                /* Be conservative */
                return TRUE;
        } else {
                mono_class_init (klass);

                return klass->has_references;
        }
}

/* useful until we keep track of gc-references in corlib etc. */
#ifdef HAVE_SGEN_GC
#define IS_GC_REFERENCE(t) FALSE
#else
#define IS_GC_REFERENCE(t) ((t)->type == MONO_TYPE_U && class->image == mono_defaults.corlib)
#endif

/*
 * mono_type_get_basic_type_from_generic:
 * @type: a type
 *
 * Returns a closed type corresponding to the possibly open type
 * passed to it.
 */
MonoType*
mono_type_get_basic_type_from_generic (MonoType *type)
{
        /* When we do generic sharing we let type variables stand for reference types. */
        if (!type->byref && (type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR))
                return &mono_defaults.object_class->byval_arg;
        return type;
}

/*
 * mono_class_layout_fields:
 * @class: a class
 *
 * Compute the placement of fields inside an object or struct, according to
 * the layout rules and set the following fields in @class:
 *  - has_references (if the class contains instance references firled or structs that contain references)
 *  - has_static_refs (same, but for static fields)
 *  - instance_size (size of the object in memory)
 *  - class_size (size needed for the static fields)
 *  - size_inited (flag set when the instance_size is set)
 *
 * LOCKING: this is supposed to be called with the loader lock held.
 */
void
mono_class_layout_fields (MonoClass *class)
{
        int i;
        const int top = class->field.count;
        guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
        guint32 pass, passes, real_size;
        gboolean gc_aware_layout = FALSE;
        MonoClassField *field;

        /*
         * When we do generic sharing we need to have layout
         * information for open generic classes (either with a generic
         * context containing type variables or with a generic
         * container), so we don't return in that case anymore.
         */

        /*
         * Enable GC aware auto layout: in this mode, reference
         * fields are grouped together inside objects, increasing collector 
         * performance.
         * Requires that all classes whose layout is known to native code be annotated
         * with [StructLayout (LayoutKind.Sequential)]
         * Value types have gc_aware_layout disabled by default, as per
         * what the default is for other runtimes.
         */
         /* corlib is missing [StructLayout] directives in many places */
        if (layout == TYPE_ATTRIBUTE_AUTO_LAYOUT) {
                if (class->image != mono_defaults.corlib &&
                        class->byval_arg.type != MONO_TYPE_VALUETYPE)
                        gc_aware_layout = TRUE;
                /* from System.dll, used in metadata/process.h */
                if (strcmp (class->name, "ProcessStartInfo") == 0)
                        gc_aware_layout = FALSE;
        }

        /* Compute klass->has_references */
        /* 
         * Process non-static fields first, since static fields might recursively
         * refer to the class itself.
         */
        for (i = 0; i < top; i++) {
                MonoType *ftype;

                field = &class->fields [i];

                if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
                        ftype = mono_type_get_underlying_type (field->type);
                        ftype = mono_type_get_basic_type_from_generic (ftype);
                        if (MONO_TYPE_IS_REFERENCE (ftype) || IS_GC_REFERENCE (ftype) || ((MONO_TYPE_ISSTRUCT (ftype) && mono_class_has_references (mono_class_from_mono_type (ftype)))))
                                class->has_references = TRUE;
                }
        }

        for (i = 0; i < top; i++) {
                MonoType *ftype;

                field = &class->fields [i];

                if (field->type->attrs & FIELD_ATTRIBUTE_STATIC) {
                        ftype = mono_type_get_underlying_type (field->type);
                        ftype = mono_type_get_basic_type_from_generic (ftype);
                        if (MONO_TYPE_IS_REFERENCE (ftype) || IS_GC_REFERENCE (ftype) || ((MONO_TYPE_ISSTRUCT (ftype) && mono_class_has_references (mono_class_from_mono_type (ftype)))))
                                class->has_static_refs = TRUE;
                }
        }

        for (i = 0; i < top; i++) {
                MonoType *ftype;

                field = &class->fields [i];

                ftype = mono_type_get_underlying_type (field->type);
                ftype = mono_type_get_basic_type_from_generic (ftype);
                if (MONO_TYPE_IS_REFERENCE (ftype) || IS_GC_REFERENCE (ftype) || ((MONO_TYPE_ISSTRUCT (ftype) && mono_class_has_references (mono_class_from_mono_type (ftype))))) {
                        if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
                                class->has_static_refs = TRUE;
                        else
                                class->has_references = TRUE;
                }
        }

        /*
         * Compute field layout and total size (not considering static fields)
         */

        switch (layout) {
        case TYPE_ATTRIBUTE_AUTO_LAYOUT:
        case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:

                if (gc_aware_layout)
                        passes = 2;
                else
                        passes = 1;

                if (layout != TYPE_ATTRIBUTE_AUTO_LAYOUT)
                        passes = 1;

                if (class->parent)
                        real_size = class->parent->instance_size;
                else
                        real_size = sizeof (MonoObject);

                for (pass = 0; pass < passes; ++pass) {
                        for (i = 0; i < top; i++){
                                gint32 align;
                                guint32 size;
                                MonoType *ftype;

                                field = &class->fields [i];

                                if (mono_field_is_deleted (field))
                                        continue;
                                if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
                                        continue;

                                ftype = mono_type_get_underlying_type (field->type);
                                ftype = mono_type_get_basic_type_from_generic (ftype);
                                if (gc_aware_layout) {
                                        if (MONO_TYPE_IS_REFERENCE (ftype) || IS_GC_REFERENCE (ftype) || ((MONO_TYPE_ISSTRUCT (ftype) && mono_class_has_references (mono_class_from_mono_type (ftype))))) {
                                                if (pass == 1)
                                                        continue;
                                        } else {
                                                if (pass == 0)
                                                        continue;
                                        }
                                }

                                if ((top == 1) && (class->instance_size == sizeof (MonoObject)) &&
                                        (strcmp (mono_field_get_name (field), "$PRIVATE$") == 0)) {
                                        /* This field is a hack inserted by MCS to empty structures */
                                        continue;
                                }

                                size = mono_type_size (field->type, &align);
                        
                                /* FIXME (LAMESPEC): should we also change the min alignment according to pack? */
                                align = class->packing_size ? MIN (class->packing_size, align): align;
                                /* if the field has managed references, we need to force-align it
                                 * see bug #77788
                                 */
                                if (MONO_TYPE_IS_REFERENCE (ftype) || IS_GC_REFERENCE (ftype) || ((MONO_TYPE_ISSTRUCT (ftype) && mono_class_has_references (mono_class_from_mono_type (ftype)))))
                                        align = MAX (align, sizeof (gpointer));

                                class->min_align = MAX (align, class->min_align);
                                field->offset = real_size;
                                if (align) {
                                        field->offset += align - 1;
                                        field->offset &= ~(align - 1);
                                }
                                /*TypeBuilders produce all sort of weird things*/
                                g_assert (class->image->dynamic || field->offset > 0);
                                real_size = field->offset + size;
                        }

                        class->instance_size = MAX (real_size, class->instance_size);
       
                        if (class->instance_size & (class->min_align - 1)) {
                                class->instance_size += class->min_align - 1;
                                class->instance_size &= ~(class->min_align - 1);
                        }
                }
                break;
        case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
                real_size = 0;
                for (i = 0; i < top; i++) {
                        gint32 align;
                        guint32 size;
                        MonoType *ftype;

                        field = &class->fields [i];

                        /*
                         * There must be info about all the fields in a type if it
                         * uses explicit layout.
                         */

                        if (mono_field_is_deleted (field))
                                continue;
                        if (field->type->attrs & FIELD_ATTRIBUTE_STATIC)
                                continue;

                        size = mono_type_size (field->type, &align);
                        class->min_align = MAX (align, class->min_align);

                        /*
                         * When we get here, field->offset is already set by the
                         * loader (for either runtime fields or fields loaded from metadata).
                         * The offset is from the start of the object: this works for both
                         * classes and valuetypes.
                         */
                        field->offset += sizeof (MonoObject);
                        ftype = mono_type_get_underlying_type (field->type);
                        ftype = mono_type_get_basic_type_from_generic (ftype);
                        if (MONO_TYPE_IS_REFERENCE (ftype) || ((MONO_TYPE_ISSTRUCT (ftype) && mono_class_has_references (mono_class_from_mono_type (ftype))))) {
                                if (field->offset % sizeof (gpointer)) {
                                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                }
                        }

                        /*
                         * Calc max size.
                         */
                        real_size = MAX (real_size, size + field->offset);
                }
                class->instance_size = MAX (real_size, class->instance_size);
                break;
        }

        if (layout != TYPE_ATTRIBUTE_EXPLICIT_LAYOUT) {
                /*
                 * For small structs, set min_align to at least the struct size to improve
                 * performance, and since the JIT memset/memcpy code assumes this and generates 
                 * unaligned accesses otherwise. See #78990 for a testcase.
                 */
                if (class->instance_size <= sizeof (MonoObject) + sizeof (gpointer))
                        class->min_align = MAX (class->min_align, class->instance_size - sizeof (MonoObject));
        }

        class->size_inited = 1;

        /*
         * Compute static field layout and size
         */
        for (i = 0; i < top; i++){
                gint32 align;
                guint32 size;

                field = &class->fields [i];
                        
                if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC) || field->type->attrs & FIELD_ATTRIBUTE_LITERAL)
                        continue;
                if (mono_field_is_deleted (field))
                        continue;

                if (mono_type_has_exceptions (field->type)) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        break;
                }

                size = mono_type_size (field->type, &align);
                field->offset = class->sizes.class_size;
                /*align is always non-zero here*/
                field->offset += align - 1;
                field->offset &= ~(align - 1);
                class->sizes.class_size = field->offset + size;
        }
}

static MonoMethod*
create_array_method (MonoClass *class, const char *name, MonoMethodSignature *sig)
{
        MonoMethod *method;

        method = (MonoMethod *) mono_image_alloc0 (class->image, sizeof (MonoMethodPInvoke));
        method->klass = class;
        method->flags = METHOD_ATTRIBUTE_PUBLIC;
        method->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
        method->signature = sig;
        method->name = name;
        method->slot = -1;
        /* .ctor */
        if (name [0] == '.') {
                method->flags |= METHOD_ATTRIBUTE_RT_SPECIAL_NAME | METHOD_ATTRIBUTE_SPECIAL_NAME;
        } else {
                method->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
        }
        return method;
}

/*
 * mono_class_setup_methods:
 * @class: a class
 *
 *   Initializes the 'methods' array in the klass.
 * Calling this method should be avoided if possible since it allocates a lot 
 * of long-living MonoMethod structures.
 * Methods belonging to an interface are assigned a sequential slot starting
 * from 0.
 *
 * On failure this function sets class->exception_type
 */
void
mono_class_setup_methods (MonoClass *class)
{
        int i;
        MonoMethod **methods;

        if (class->methods)
                return;

        mono_loader_lock ();

        if (class->methods) {
                mono_loader_unlock ();
                return;
        }

        if (class->generic_class) {
                MonoError error;
                MonoClass *gklass = class->generic_class->container_class;

                mono_class_init (gklass);
                if (!gklass->exception_type)
                        mono_class_setup_methods (gklass);
                if (gklass->exception_type) {
                        /*FIXME make exception_data less opaque so it's possible to dup it here*/
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Generic type definition failed to load"));
                        mono_loader_unlock ();
                        return;
                }

                /* The + 1 makes this always non-NULL to pass the check in mono_class_setup_methods () */
                class->method.count = gklass->method.count;
                methods = mono_class_alloc0 (class, sizeof (MonoMethod*) * (class->method.count + 1));

                for (i = 0; i < class->method.count; i++) {
                        methods [i] = mono_class_inflate_generic_method_full_checked (
                                gklass->methods [i], class, mono_class_get_context (class), &error);
                        if (!mono_error_ok (&error)) {
                                char *method = mono_method_full_name (gklass->methods [i], TRUE);
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Could not inflate method %s due to %s", method, mono_error_get_message (&error)));

                                g_free (method);
                                mono_error_cleanup (&error);
                                mono_loader_unlock ();
                                return;                         
                        }
                }
        } else if (class->rank) {
                MonoError error;
                MonoMethod *amethod;
                MonoMethodSignature *sig;
                int count_generic = 0, first_generic = 0;
                int method_num = 0;

                class->method.count = 3 + (class->rank > 1? 2: 1);

                mono_class_setup_interfaces (class, &error);
                g_assert (mono_error_ok (&error)); /*FIXME can this fail for array types?*/

                if (class->interface_count) {
                        count_generic = generic_array_methods (class);
                        first_generic = class->method.count;
                        class->method.count += class->interface_count * count_generic;
                }

                methods = mono_class_alloc0 (class, sizeof (MonoMethod*) * class->method.count);

                sig = mono_metadata_signature_alloc (class->image, class->rank);
                sig->ret = &mono_defaults.void_class->byval_arg;
                sig->pinvoke = TRUE;
                sig->hasthis = TRUE;
                for (i = 0; i < class->rank; ++i)
                        sig->params [i] = &mono_defaults.int32_class->byval_arg;

                amethod = create_array_method (class, ".ctor", sig);
                methods [method_num++] = amethod;
                if (class->rank > 1) {
                        sig = mono_metadata_signature_alloc (class->image, class->rank * 2);
                        sig->ret = &mono_defaults.void_class->byval_arg;
                        sig->pinvoke = TRUE;
                        sig->hasthis = TRUE;
                        for (i = 0; i < class->rank * 2; ++i)
                                sig->params [i] = &mono_defaults.int32_class->byval_arg;

                        amethod = create_array_method (class, ".ctor", sig);
                        methods [method_num++] = amethod;
                }
                /* element Get (idx11, [idx2, ...]) */
                sig = mono_metadata_signature_alloc (class->image, class->rank);
                sig->ret = &class->element_class->byval_arg;
                sig->pinvoke = TRUE;
                sig->hasthis = TRUE;
                for (i = 0; i < class->rank; ++i)
                        sig->params [i] = &mono_defaults.int32_class->byval_arg;
                amethod = create_array_method (class, "Get", sig);
                methods [method_num++] = amethod;
                /* element& Address (idx11, [idx2, ...]) */
                sig = mono_metadata_signature_alloc (class->image, class->rank);
                sig->ret = &class->element_class->this_arg;
                sig->pinvoke = TRUE;
                sig->hasthis = TRUE;
                for (i = 0; i < class->rank; ++i)
                        sig->params [i] = &mono_defaults.int32_class->byval_arg;
                amethod = create_array_method (class, "Address", sig);
                methods [method_num++] = amethod;
                /* void Set (idx11, [idx2, ...], element) */
                sig = mono_metadata_signature_alloc (class->image, class->rank + 1);
                sig->ret = &mono_defaults.void_class->byval_arg;
                sig->pinvoke = TRUE;
                sig->hasthis = TRUE;
                for (i = 0; i < class->rank; ++i)
                        sig->params [i] = &mono_defaults.int32_class->byval_arg;
                sig->params [i] = &class->element_class->byval_arg;
                amethod = create_array_method (class, "Set", sig);
                methods [method_num++] = amethod;

                for (i = 0; i < class->interface_count; i++)
                        setup_generic_array_ifaces (class, class->interfaces [i], methods, first_generic + i * count_generic);
        } else {
                methods = mono_class_alloc (class, sizeof (MonoMethod*) * class->method.count);
                for (i = 0; i < class->method.count; ++i) {
                        int idx = mono_metadata_translate_token_index (class->image, MONO_TABLE_METHOD, class->method.first + i + 1);
                        methods [i] = mono_get_method (class->image, MONO_TOKEN_METHOD_DEF | idx, class);
                }
        }

        if (MONO_CLASS_IS_INTERFACE (class)) {
                int slot = 0;
                /*Only assign slots to virtual methods as interfaces are allowed to have static methods.*/
                for (i = 0; i < class->method.count; ++i) {
                        if (methods [i]->flags & METHOD_ATTRIBUTE_VIRTUAL)
                                methods [i]->slot = slot++;
                }
        }

        /* Needed because of the double-checking locking pattern */
        mono_memory_barrier ();

        class->methods = methods;

        if (mono_debugger_class_loaded_methods_func)
                mono_debugger_class_loaded_methods_func (class);

        mono_loader_unlock ();
}

/*
 * mono_class_get_method_by_index:
 *
 *   Returns class->methods [index], initializing class->methods if neccesary.
 *
 * LOCKING: Acquires the loader lock.
 */
MonoMethod*
mono_class_get_method_by_index (MonoClass *class, int index)
{
        /* Avoid calling setup_methods () if possible */
        if (class->generic_class && !class->methods) {
                MonoClass *gklass = class->generic_class->container_class;
                MonoMethod *m;

                m = mono_class_inflate_generic_method_full (
                                gklass->methods [index], class, mono_class_get_context (class));
                /*
                 * If setup_methods () is called later for this class, no duplicates are created,
                 * since inflate_generic_method guarantees that only one instance of a method
                 * is created for each context.
                 */
                /*
                mono_class_setup_methods (class);
                g_assert (m == class->methods [index]);
                */
                return m;
        } else {
                mono_class_setup_methods (class);
                if (class->exception_type) /*FIXME do proper error handling*/
                        return NULL;
                g_assert (index >= 0 && index < class->method.count);
                return class->methods [index];
        }
}       

/*
 * mono_class_get_inflated_method:
 *
 *   Given an inflated class CLASS and a method METHOD which should be a method of
 * CLASS's generic definition, return the inflated method corresponding to METHOD.
 */
MonoMethod*
mono_class_get_inflated_method (MonoClass *class, MonoMethod *method)
{
        MonoClass *gklass = class->generic_class->container_class;
        int i;

        g_assert (method->klass == gklass);

        mono_class_setup_methods (gklass);
        g_assert (!gklass->exception_type); /*FIXME do proper error handling*/

        for (i = 0; i < gklass->method.count; ++i) {
                if (gklass->methods [i] == method) {
                        if (class->methods)
                                return class->methods [i];
                        else
                                return mono_class_inflate_generic_method_full (gklass->methods [i], class, mono_class_get_context (class));
                }
        }

        return NULL;
}       

/*
 * mono_class_get_vtable_entry:
 *
 *   Returns class->vtable [offset], computing it if neccesary.
 * LOCKING: Acquires the loader lock.
 */
MonoMethod*
mono_class_get_vtable_entry (MonoClass *class, int offset)
{
        MonoMethod *m;

        if (class->rank == 1) {
                /* 
                 * szarrays do not overwrite any methods of Array, so we can avoid
                 * initializing their vtables in some cases.
                 */
                mono_class_setup_vtable (class->parent);
                if (offset < class->parent->vtable_size)
                        return class->parent->vtable [offset];
        }

        if (class->generic_class) {
                MonoClass *gklass = class->generic_class->container_class;
                mono_class_setup_vtable (gklass);
                m = gklass->vtable [offset];

                m = mono_class_inflate_generic_method_full (m, class, mono_class_get_context (class));
        } else {
                mono_class_setup_vtable (class);
                m = class->vtable [offset];
        }

        return m;
}

/*
 * mono_class_get_vtable_size:
 *
 *   Return the vtable size for KLASS.
 */
int
mono_class_get_vtable_size (MonoClass *klass)
{
        mono_class_setup_vtable (klass);

        return klass->vtable_size;
}

/*This method can fail the class.*/
static void
mono_class_setup_properties (MonoClass *class)
{
        guint startm, endm, i, j;
        guint32 cols [MONO_PROPERTY_SIZE];
        MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
        MonoProperty *properties;
        guint32 last;

        if (class->ext && class->ext->properties)
                return;

        mono_loader_lock ();

        if (class->ext && class->ext->properties) {
                mono_loader_unlock ();
                return;
        }

        mono_class_alloc_ext (class);

        if (class->generic_class) {
                MonoClass *gklass = class->generic_class->container_class;

                mono_class_init (gklass);
                mono_class_setup_properties (gklass);
                if (gklass->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Generic type definition failed to load"));
                        mono_loader_unlock ();                  
                        return;
                }

                class->ext->property = gklass->ext->property;

                properties = mono_class_new0 (class, MonoProperty, class->ext->property.count + 1);

                for (i = 0; i < class->ext->property.count; i++) {
                        MonoProperty *prop = &properties [i];

                        *prop = gklass->ext->properties [i];

                        if (prop->get)
                                prop->get = mono_class_inflate_generic_method_full (
                                        prop->get, class, mono_class_get_context (class));
                        if (prop->set)
                                prop->set = mono_class_inflate_generic_method_full (
                                        prop->set, class, mono_class_get_context (class));

                        prop->parent = class;
                }
        } else {
                int first = mono_metadata_properties_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &last);
                int count = last - first;

                if (count) {
                        mono_class_setup_methods (class);
                        if (class->exception_type) {
                                mono_loader_unlock ();
                                return;
                        }
                }

                class->ext->property.first = first;
                class->ext->property.count = count;
                properties = mono_class_alloc0 (class, sizeof (MonoProperty) * count);
                for (i = first; i < last; ++i) {
                        mono_metadata_decode_table_row (class->image, MONO_TABLE_PROPERTY, i, cols, MONO_PROPERTY_SIZE);
                        properties [i - first].parent = class;
                        properties [i - first].attrs = cols [MONO_PROPERTY_FLAGS];
                        properties [i - first].name = mono_metadata_string_heap (class->image, cols [MONO_PROPERTY_NAME]);

                        startm = mono_metadata_methods_from_property (class->image, i, &endm);
                        for (j = startm; j < endm; ++j) {
                                MonoMethod *method;

                                mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);

                                if (class->image->uncompressed_metadata)
                                        /* It seems like the MONO_METHOD_SEMA_METHOD column needs no remapping */
                                        method = mono_get_method (class->image, MONO_TOKEN_METHOD_DEF | cols [MONO_METHOD_SEMA_METHOD], class);
                                else
                                        method = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];

                                switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
                                case METHOD_SEMANTIC_SETTER:
                                        properties [i - first].set = method;
                                        break;
                                case METHOD_SEMANTIC_GETTER:
                                        properties [i - first].get = method;
                                        break;
                                default:
                                        break;
                                }
                        }
                }
        }
        /*Flush any pending writes as we do double checked locking on class->properties */
        mono_memory_barrier ();

        /* Leave this assignment as the last op in the function */
        class->ext->properties = properties;

        mono_loader_unlock ();
}

static MonoMethod**
inflate_method_listz (MonoMethod **methods, MonoClass *class, MonoGenericContext *context)
{
        MonoMethod **om, **retval;
        int count;

        for (om = methods, count = 0; *om; ++om, ++count)
                ;

        retval = g_new0 (MonoMethod*, count + 1);
        count = 0;
        for (om = methods, count = 0; *om; ++om, ++count)
                retval [count] = mono_class_inflate_generic_method_full (*om, class, context);

        return retval;
}

/*This method can fail the class.*/
static void
mono_class_setup_events (MonoClass *class)
{
        int first, count;
        guint startm, endm, i, j;
        guint32 cols [MONO_EVENT_SIZE];
        MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
        guint32 last;
        MonoEvent *events;

        if (class->ext && class->ext->events)
                return;

        mono_loader_lock ();

        if (class->ext && class->ext->events) {
                mono_loader_unlock ();
                return;
        }

        mono_class_alloc_ext (class);

        if (class->generic_class) {
                MonoClass *gklass = class->generic_class->container_class;
                MonoGenericContext *context;

                mono_class_setup_events (gklass);
                if (gklass->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Generic type definition failed to load"));
                        mono_loader_unlock ();
                        return;
                }

                class->ext->event = gklass->ext->event;
                class->ext->events = mono_class_new0 (class, MonoEvent, class->ext->event.count);

                if (class->ext->event.count)
                        context = mono_class_get_context (class);

                for (i = 0; i < class->ext->event.count; i++) {
                        MonoEvent *event = &class->ext->events [i];
                        MonoEvent *gevent = &gklass->ext->events [i];

                        event->parent = class;
                        event->name = gevent->name;
                        event->add = gevent->add ? mono_class_inflate_generic_method_full (gevent->add, class, context) : NULL;
                        event->remove = gevent->remove ? mono_class_inflate_generic_method_full (gevent->remove, class, context) : NULL;
                        event->raise = gevent->raise ? mono_class_inflate_generic_method_full (gevent->raise, class, context) : NULL;
#ifndef MONO_SMALL_CONFIG
                        event->other = gevent->other ? inflate_method_listz (gevent->other, class, context) : NULL;
#endif
                        event->attrs = gevent->attrs;
                }

                mono_loader_unlock ();
                return;
        }

        first = mono_metadata_events_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &last);
        count = last - first;

        if (count) {
                mono_class_setup_methods (class);
                if (class->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Generic type definition failed to load"));
                        mono_loader_unlock ();
                        return;
                }
        }
        class->ext->event.first = first;
        class->ext->event.count = count;
        events = mono_class_alloc0 (class, sizeof (MonoEvent) * class->ext->event.count);
        for (i = first; i < last; ++i) {
                MonoEvent *event = &events [i - first];

                mono_metadata_decode_table_row (class->image, MONO_TABLE_EVENT, i, cols, MONO_EVENT_SIZE);
                event->parent = class;
                event->attrs = cols [MONO_EVENT_FLAGS];
                event->name = mono_metadata_string_heap (class->image, cols [MONO_EVENT_NAME]);

                startm = mono_metadata_methods_from_event (class->image, i, &endm);
                for (j = startm; j < endm; ++j) {
                        MonoMethod *method;

                        mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);

                        if (class->image->uncompressed_metadata)
                                /* It seems like the MONO_METHOD_SEMA_METHOD column needs no remapping */
                                method = mono_get_method (class->image, MONO_TOKEN_METHOD_DEF | cols [MONO_METHOD_SEMA_METHOD], class);
                        else
                                method = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];

                        switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
                        case METHOD_SEMANTIC_ADD_ON:
                                event->add = method;
                                break;
                        case METHOD_SEMANTIC_REMOVE_ON:
                                event->remove = method;
                                break;
                        case METHOD_SEMANTIC_FIRE:
                                event->raise = method;
                                break;
                        case METHOD_SEMANTIC_OTHER: {
#ifndef MONO_SMALL_CONFIG
                                int n = 0;

                                if (event->other == NULL) {
                                        event->other = g_new0 (MonoMethod*, 2);
                                } else {
                                        while (event->other [n])
                                                n++;
                                        event->other = g_realloc (event->other, (n + 2) * sizeof (MonoMethod*));
                                }
                                event->other [n] = method;
                                /* NULL terminated */
                                event->other [n + 1] = NULL;
#endif
                                break;
                        }
                        default:
                                break;
                        }
                }
        }
        /*Flush any pending writes as we do double checked locking on class->properties */
        mono_memory_barrier ();

        /* Leave this assignment as the last op in the function */
        class->ext->events = events;

        mono_loader_unlock ();
}

/*
 * Global pool of interface IDs, represented as a bitset.
 * LOCKING: this is supposed to be accessed with the loader lock held.
 */
static MonoBitSet *global_interface_bitset = NULL;

/*
 * mono_unload_interface_ids:
 * @bitset: bit set of interface IDs
 *
 * When an image is unloaded, the interface IDs associated with
 * the image are put back in the global pool of IDs so the numbers
 * can be reused.
 */
void
mono_unload_interface_ids (MonoBitSet *bitset)
{
        mono_loader_lock ();
        mono_bitset_sub (global_interface_bitset, bitset);
        mono_loader_unlock ();
}

/*
 * mono_get_unique_iid:
 * @class: interface
 *
 * Assign a unique integer ID to the interface represented by @class.
 * The ID will positive and as small as possible.
 * LOCKING: this is supposed to be called with the loader lock held.
 * Returns: the new ID.
 */
static guint
mono_get_unique_iid (MonoClass *class)
{
        int iid;
        
        g_assert (MONO_CLASS_IS_INTERFACE (class));

        if (!global_interface_bitset) {
                global_interface_bitset = mono_bitset_new (128, 0);
        }

        iid = mono_bitset_find_first_unset (global_interface_bitset, -1);
        if (iid < 0) {
                int old_size = mono_bitset_size (global_interface_bitset);
                MonoBitSet *new_set = mono_bitset_clone (global_interface_bitset, old_size * 2);
                mono_bitset_free (global_interface_bitset);
                global_interface_bitset = new_set;
                iid = old_size;
        }
        mono_bitset_set (global_interface_bitset, iid);
        /* set the bit also in the per-image set */
        if (class->image->interface_bitset) {
                if (iid >= mono_bitset_size (class->image->interface_bitset)) {
                        MonoBitSet *new_set = mono_bitset_clone (class->image->interface_bitset, iid + 1);
                        mono_bitset_free (class->image->interface_bitset);
                        class->image->interface_bitset = new_set;
                }
        } else {
                class->image->interface_bitset = mono_bitset_new (iid + 1, 0);
        }
        mono_bitset_set (class->image->interface_bitset, iid);

#ifndef MONO_SMALL_CONFIG
        if (mono_print_vtable) {
                int generic_id;
                char *type_name = mono_type_full_name (&class->byval_arg);
                if (class->generic_class && !class->generic_class->context.class_inst->is_open) {
                        generic_id = class->generic_class->context.class_inst->id;
                        g_assert (generic_id != 0);
                } else {
                        generic_id = 0;
                }
                printf ("Interface: assigned id %d to %s|%s|%d\n", iid, class->image->name, type_name, generic_id);
                g_free (type_name);
        }
#endif

        g_assert (iid <= 65535);
        return iid;
}

static void
collect_implemented_interfaces_aux (MonoClass *klass, GPtrArray **res, MonoError *error)
{
        int i;
        MonoClass *ic;

        mono_class_setup_interfaces (klass, error);
        if (!mono_error_ok (error))
                return;

        for (i = 0; i < klass->interface_count; i++) {
                ic = klass->interfaces [i];

                if (*res == NULL)
                        *res = g_ptr_array_new ();
                g_ptr_array_add (*res, ic);
                mono_class_init (ic);

                collect_implemented_interfaces_aux (ic, res, error);
                if (!mono_error_ok (error))
                        return;
        }
}

GPtrArray*
mono_class_get_implemented_interfaces (MonoClass *klass, MonoError *error)
{
        GPtrArray *res = NULL;

        collect_implemented_interfaces_aux (klass, &res, error);
        if (!mono_error_ok (error)) {
                if (res)
                        g_ptr_array_free (res, TRUE);
                return NULL;
        }
        return res;
}

static int
compare_interface_ids (const void *p_key, const void *p_element) {
        const MonoClass *key = p_key;
        const MonoClass *element = *(MonoClass**) p_element;
        
        return (key->interface_id - element->interface_id);
}

/*FIXME verify all callers if they should switch to mono_class_interface_offset_with_variance*/
int
mono_class_interface_offset (MonoClass *klass, MonoClass *itf) {
        MonoClass **result = bsearch (
                        itf,
                        klass->interfaces_packed,
                        klass->interface_offsets_count,
                        sizeof (MonoClass *),
                        compare_interface_ids);
        if (result) {
                return klass->interface_offsets_packed [result - (klass->interfaces_packed)];
        } else {
                return -1;
        }
}

/*
 * mono_class_interface_offset_with_variance:
 * 
 * Return the interface offset of @itf in @klass. Sets @non_exact_match to TRUE if the match required variance check
 * If @itf is an interface with generic variant arguments, try to find the compatible one.
 *
 * Note that this function is responsible for resolving ambiguities. Right now we use whatever ordering interfaces_packed gives us.
 *
 * FIXME figure out MS disambiguation rules and fix this function.
 */
int
mono_class_interface_offset_with_variance (MonoClass *klass, MonoClass *itf, gboolean *non_exact_match) {
        int i = mono_class_interface_offset (klass, itf);
        *non_exact_match = FALSE;
        if (i >= 0)
                return i;
        
        if (!mono_class_has_variant_generic_params (itf))
                return -1;

        for (i = 0; i < klass->interface_offsets_count; i++) {
                if (mono_class_is_variant_compatible (itf, klass->interfaces_packed [i])) {
                        *non_exact_match = TRUE;
                        return klass->interface_offsets_packed [i];
                }
        }

        return -1;
}

static void
print_implemented_interfaces (MonoClass *klass) {
        char *name;
        MonoError error;
        GPtrArray *ifaces = NULL;
        int i;
        int ancestor_level = 0;

        name = mono_type_get_full_name (klass);
        printf ("Packed interface table for class %s has size %d\n", name, klass->interface_offsets_count);
        g_free (name);

        for (i = 0; i < klass->interface_offsets_count; i++)
                printf ("  [%03d][UUID %03d][SLOT %03d][SIZE  %03d] interface %s.%s\n", i,
                                klass->interfaces_packed [i]->interface_id,
                                klass->interface_offsets_packed [i],
                                klass->interfaces_packed [i]->method.count,
                                klass->interfaces_packed [i]->name_space,
                                klass->interfaces_packed [i]->name );
        printf ("Interface flags: ");
        for (i = 0; i <= klass->max_interface_id; i++)
                if (MONO_CLASS_IMPLEMENTS_INTERFACE (klass, i))
                        printf ("(%d,T)", i);
                else
                        printf ("(%d,F)", i);
        printf ("\n");
        printf ("Dump interface flags:");
#ifdef COMPRESSED_INTERFACE_BITMAP
        {
                const uint8_t* p = klass->interface_bitmap;
                i = klass->max_interface_id;
                while (i > 0) {
                        printf (" %d x 00 %02X", p [0], p [1]);
                        i -= p [0] * 8;
                        i -= 8;
                }
        }
#else
        for (i = 0; i < ((((klass->max_interface_id + 1) >> 3)) + (((klass->max_interface_id + 1) & 7)? 1 :0)); i++)
                printf (" %02X", klass->interface_bitmap [i]);
#endif
        printf ("\n");
        while (klass != NULL) {
                printf ("[LEVEL %d] Implemented interfaces by class %s:\n", ancestor_level, klass->name);
                ifaces = mono_class_get_implemented_interfaces (klass, &error);
                if (!mono_error_ok (&error)) {
                        printf ("  Type failed due to %s\n", mono_error_get_message (&error));
                        mono_error_cleanup (&error);
                } else if (ifaces) {
                        for (i = 0; i < ifaces->len; i++) {
                                MonoClass *ic = g_ptr_array_index (ifaces, i);
                                printf ("  [UIID %d] interface %s\n", ic->interface_id, ic->name);
                                printf ("  [%03d][UUID %03d][SLOT %03d][SIZE  %03d] interface %s.%s\n", i,
                                                ic->interface_id,
                                                mono_class_interface_offset (klass, ic),
                                                ic->method.count,
                                                ic->name_space,
                                                ic->name );
                        }
                        g_ptr_array_free (ifaces, TRUE);
                }
                ancestor_level ++;
                klass = klass->parent;
        }
}

static MonoClass*
inflate_class_one_arg (MonoClass *gtype, MonoClass *arg0)
{
        MonoType *args [1];
        args [0] = &arg0->byval_arg;

        return mono_class_bind_generic_parameters (gtype, 1, args, FALSE);
}

static MonoClass*
array_class_get_if_rank (MonoClass *class, guint rank)
{
        return rank ? mono_array_class_get (class, rank) :  class;
}

static void
fill_valuetype_array_derived_types (MonoClass **valuetype_types, MonoClass *eclass, int rank)
{
        valuetype_types [0] = eclass;
        if (eclass == mono_defaults.int16_class)
                valuetype_types [1] = mono_defaults.uint16_class;
        else if (eclass == mono_defaults.uint16_class)
                valuetype_types [1] = mono_defaults.int16_class;
        else if (eclass == mono_defaults.int32_class)
                valuetype_types [1] = mono_defaults.uint32_class;
        else if (eclass == mono_defaults.uint32_class)
                valuetype_types [1] = mono_defaults.int32_class;
        else if (eclass == mono_defaults.int64_class)
                valuetype_types [1] = mono_defaults.uint64_class;
        else if (eclass == mono_defaults.uint64_class)
                valuetype_types [1] = mono_defaults.int64_class;
        else if (eclass == mono_defaults.byte_class)
                valuetype_types [1] = mono_defaults.sbyte_class;
        else if (eclass == mono_defaults.sbyte_class)
                valuetype_types [1] = mono_defaults.byte_class;
        else if (eclass->enumtype && mono_class_enum_basetype (eclass))
                valuetype_types [1] = mono_class_from_mono_type (mono_class_enum_basetype (eclass));
}

/* this won't be needed once bug #325495 is completely fixed
 * though we'll need something similar to know which interfaces to allow
 * in arrays when they'll be lazyly created
 * 
 * FIXME: System.Array/InternalEnumerator don't need all this interface fabrication machinery.
 * MS returns diferrent types based on which instance is called. For example:
 *      object obj = new byte[10][];
 *      Type a = ((IEnumerable<byte[]>)obj).GetEnumerator ().GetType ();
 *      Type b = ((IEnumerable<IList<byte>>)obj).GetEnumerator ().GetType ();
 *      a != b ==> true
 * 
 * Fixing this should kill quite some code, save some bits and improve compatibility.
 */
static MonoClass**
get_implicit_generic_array_interfaces (MonoClass *class, int *num, int *is_enumerator)
{
        MonoClass *eclass = class->element_class;
        static MonoClass* generic_icollection_class = NULL;
        static MonoClass* generic_ienumerable_class = NULL;
        static MonoClass* generic_ienumerator_class = NULL;
        MonoClass *valuetype_types[2] = { NULL, NULL };
        MonoClass **interfaces = NULL;
        int i, interface_count, real_count, original_rank;
        int all_interfaces;
        gboolean internal_enumerator;
        gboolean eclass_is_valuetype;

        if (!mono_defaults.generic_ilist_class) {
                *num = 0;
                return NULL;
        }
        internal_enumerator = FALSE;
        eclass_is_valuetype = FALSE;
        original_rank = eclass->rank;
        if (class->byval_arg.type != MONO_TYPE_SZARRAY) {
                if (class->generic_class && class->nested_in == mono_defaults.array_class && strcmp (class->name, "InternalEnumerator`1") == 0)  {
                        /*
                         * For a Enumerator<T[]> we need to get the list of interfaces for T.
                         */
                        eclass = mono_class_from_mono_type (class->generic_class->context.class_inst->type_argv [0]);
                        original_rank = eclass->rank;
                        eclass = eclass->element_class;
                        internal_enumerator = TRUE;
                        *is_enumerator = TRUE;
                } else {
                        *num = 0;
                        return NULL;
                }
        }

        /* 
         * with this non-lazy impl we can't implement all the interfaces so we do just the minimal stuff
         * for deep levels of arrays of arrays (string[][] has all the interfaces, string[][][] doesn't)
         */
        all_interfaces = eclass->rank && eclass->element_class->rank? FALSE: TRUE;

        if (!generic_icollection_class) {
                generic_icollection_class = mono_class_from_name (mono_defaults.corlib,
                        "System.Collections.Generic", "ICollection`1");
                generic_ienumerable_class = mono_class_from_name (mono_defaults.corlib,
                        "System.Collections.Generic", "IEnumerable`1");
                generic_ienumerator_class = mono_class_from_name (mono_defaults.corlib,
                        "System.Collections.Generic", "IEnumerator`1");
        }

        mono_class_init (eclass);

        /*
         * Arrays in 2.0 need to implement a number of generic interfaces
         * (IList`1, ICollection`1, IEnumerable`1 for a number of types depending
         * on the element class). We collect the types needed to build the
         * instantiations in interfaces at intervals of 3, because 3 are
         * the generic interfaces needed to implement.
         */
        if (eclass->valuetype) {
                fill_valuetype_array_derived_types (valuetype_types, eclass, original_rank);

                /* IList, ICollection, IEnumerable */
                real_count = interface_count = valuetype_types [1] ? 6 : 3;
                if (internal_enumerator) {
                        ++real_count;
                        if (valuetype_types [1])
                                ++real_count;
                }

                interfaces = g_malloc0 (sizeof (MonoClass*) * real_count);
                interfaces [0] = valuetype_types [0];
                if (valuetype_types [1])
                        interfaces [3] = valuetype_types [1];

                eclass_is_valuetype = TRUE;
        } else {
                int j;
                int idepth = eclass->idepth;
                if (!internal_enumerator)
                        idepth--;

                // FIXME: This doesn't seem to work/required for generic params
                if (!(eclass->this_arg.type == MONO_TYPE_VAR || eclass->this_arg.type == MONO_TYPE_MVAR || (eclass->image->dynamic && !eclass->wastypebuilder)))
                        mono_class_setup_interface_offsets (eclass);

                interface_count = all_interfaces? eclass->interface_offsets_count: eclass->interface_count;
                /* we add object for interfaces and the supertypes for the other
                 * types. The last of the supertypes is the element class itself which we
                 * already created the explicit interfaces for (so we include it for IEnumerator
                 * and exclude it for arrays).
                 */
                if (MONO_CLASS_IS_INTERFACE (eclass))
                        interface_count++;
                else
                        interface_count += idepth;
                if (eclass->rank && eclass->element_class->valuetype) {
                        fill_valuetype_array_derived_types (valuetype_types, eclass->element_class, original_rank);
                        if (valuetype_types [1])
                                ++interface_count;
                }
                /* IList, ICollection, IEnumerable */
                interface_count *= 3;
                real_count = interface_count;
                if (internal_enumerator) {
                        real_count += (MONO_CLASS_IS_INTERFACE (eclass) ? 1 : idepth) + eclass->interface_offsets_count;
                        if (valuetype_types [1])
                                ++real_count;
                }
                interfaces = g_malloc0 (sizeof (MonoClass*) * real_count);
                if (MONO_CLASS_IS_INTERFACE (eclass)) {
                        interfaces [0] = mono_defaults.object_class;
                        j = 3;
                } else {
                        j = 0;
                        for (i = 0; i < idepth; i++) {
                                mono_class_init (eclass->supertypes [i]);
                                interfaces [j] = eclass->supertypes [i];
                                j += 3;
                        }
                }
                if (all_interfaces) {
                        for (i = 0; i < eclass->interface_offsets_count; i++) {
                                interfaces [j] = eclass->interfaces_packed [i];
                                j += 3;
                        }
                } else {
                        for (i = 0; i < eclass->interface_count; i++) {
                                interfaces [j] = eclass->interfaces [i];
                                j += 3;
                        }
                }
                if (valuetype_types [1]) {
                        interfaces [j] = array_class_get_if_rank (valuetype_types [1], original_rank);
                        j += 3;
                }
        }

        /* instantiate the generic interfaces */
        for (i = 0; i < interface_count; i += 3) {
                MonoClass *iface = interfaces [i];

                interfaces [i + 0] = inflate_class_one_arg (mono_defaults.generic_ilist_class, iface);
                interfaces [i + 1] = inflate_class_one_arg (generic_icollection_class, iface);
                interfaces [i + 2] = inflate_class_one_arg (generic_ienumerable_class, iface);
        }
        if (internal_enumerator) {
                int j;
                /* instantiate IEnumerator<iface> */
                for (i = 0; i < interface_count; i++) {
                        interfaces [i] = inflate_class_one_arg (generic_ienumerator_class, interfaces [i]);
                }
                j = interface_count;
                if (!eclass_is_valuetype) {
                        if (MONO_CLASS_IS_INTERFACE (eclass)) {
                                interfaces [j] = inflate_class_one_arg (generic_ienumerator_class, mono_defaults.object_class);
                                j ++;
                        } else {
                                for (i = 0; i < eclass->idepth; i++) {
                                        interfaces [j] = inflate_class_one_arg (generic_ienumerator_class, eclass->supertypes [i]);
                                        j ++;
                                }
                        }
                        for (i = 0; i < eclass->interface_offsets_count; i++) {
                                interfaces [j] = inflate_class_one_arg (generic_ienumerator_class, eclass->interfaces_packed [i]);
                                j ++;
                        }
                } else {
                        interfaces [j++] = inflate_class_one_arg (generic_ienumerator_class, array_class_get_if_rank (valuetype_types [0], original_rank));
                }
                if (valuetype_types [1])
                        interfaces [j] = inflate_class_one_arg (generic_ienumerator_class, array_class_get_if_rank (valuetype_types [1], original_rank));
        }
#if 0
        {
        char *type_name = mono_type_get_name_full (&class->byval_arg, 0);
        for (i = 0; i  < real_count; ++i) {
                char *name = mono_type_get_name_full (&interfaces [i]->byval_arg, 0);
                g_print ("%s implements %s\n", type_name, name);
                g_free (name);
        }
        g_free (type_name);
        }
#endif
        *num = real_count;
        return interfaces;
}

static int
find_array_interface (MonoClass *klass, const char *name)
{
        int i;
        for (i = 0; i < klass->interface_count; ++i) {
                if (strcmp (klass->interfaces [i]->name, name) == 0)
                        return i;
        }
        return -1;
}

/*
 * Return the number of virtual methods.
 * Even for interfaces we can't simply return the number of methods as all CLR types are allowed to have static methods.
 * Return -1 on failure.
 * FIXME It would be nice if this information could be cached somewhere.
 */
static int
count_virtual_methods (MonoClass *class)
{
        int i, count = 0;
        guint32 flags;
        class = mono_class_get_generic_type_definition (class); /*We can find this information by looking at the GTD*/

        if (class->methods || !MONO_CLASS_HAS_STATIC_METADATA (class)) {
                mono_class_setup_methods (class);
                if (class->exception_type)
                        return -1;

                for (i = 0; i < class->method.count; ++i) {
                        flags = class->methods [i]->flags;
                        if (flags & METHOD_ATTRIBUTE_VIRTUAL)
                                ++count;
                }
        } else {
                for (i = 0; i < class->method.count; ++i) {
                        flags = mono_metadata_decode_table_row_col (class->image, MONO_TABLE_METHOD, class->method.first + i, MONO_METHOD_FLAGS);

                        if (flags & METHOD_ATTRIBUTE_VIRTUAL)
                                ++count;
                }
        }
        return count;
}

static int
find_interface (int num_ifaces, MonoClass **interfaces_full, MonoClass *ic)
{
        int m, l = 0;
        if (!num_ifaces)
                return -1;
        while (1) {
                if (l > num_ifaces)
                        return -1;
                m = (l + num_ifaces) / 2;
                if (interfaces_full [m] == ic)
                        return m;
                if (l == num_ifaces)
                        return -1;
                if (!interfaces_full [m] || interfaces_full [m]->interface_id > ic->interface_id) {
                        num_ifaces = m - 1;
                } else {
                        l =  m + 1;
                }
        }
}

static int
find_interface_offset (int num_ifaces, MonoClass **interfaces_full, int *interface_offsets_full, MonoClass *ic)
{
        int i = find_interface (num_ifaces, interfaces_full, ic);
        if (ic >= 0)
                return interface_offsets_full [i];
        return -1;
}

static mono_bool
set_interface_and_offset (int num_ifaces, MonoClass **interfaces_full, int *interface_offsets_full, MonoClass *ic, int offset, mono_bool force_set)
{
        int i = find_interface (num_ifaces, interfaces_full, ic);
        if (i >= 0) {
                if (!force_set)
                        return TRUE;
                interface_offsets_full [i] = offset;
                return FALSE;
        }
        for (i = 0; i < num_ifaces; ++i) {
                if (interfaces_full [i]) {
                        int end;
                        if (interfaces_full [i]->interface_id < ic->interface_id)
                                continue;
                        end = i + 1;
                        while (end < num_ifaces && interfaces_full [end]) end++;
                        memmove (interfaces_full + i + 1, interfaces_full + i, sizeof (MonoClass*) * (end - i));
                        memmove (interface_offsets_full + i + 1, interface_offsets_full + i, sizeof (int) * (end - i));
                }
                interfaces_full [i] = ic;
                interface_offsets_full [i] = offset;
                break;
        }
        return FALSE;
}

#ifdef COMPRESSED_INTERFACE_BITMAP

/*
 * Compressed interface bitmap design.
 *
 * Interface bitmaps take a large amount of memory, because their size is
 * linear with the maximum interface id assigned in the process (each interface
 * is assigned a unique id as it is loaded). The number of interface classes
 * is high because of the many implicit interfaces implemented by arrays (we'll
 * need to lazy-load them in the future).
 * Most classes implement a very small number of interfaces, so the bitmap is
 * sparse. This bitmap needs to be checked by interface casts, so access to the
 * needed bit must be fast and doable with few jit instructions.
 *
 * The current compression format is as follows:
 * *) it is a sequence of one or more two-byte elements
 * *) the first byte in the element is the count of empty bitmap bytes
 * at the current bitmap position
 * *) the second byte in the element is an actual bitmap byte at the current
 * bitmap position
 *
 * As an example, the following compressed bitmap bytes:
 *      0x07 0x01 0x00 0x7
 * correspond to the following bitmap:
 *      0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x01 0x07
 *
 * Each two-byte element can represent up to 2048 bitmap bits, but as few as a single
 * bitmap byte for non-sparse sequences. In practice the interface bitmaps created
 * during a gmcs bootstrap are reduced to less tha 5% of the original size.
 */

/**
 * mono_compress_bitmap:
 * @dest: destination buffer
 * @bitmap: bitmap buffer
 * @size: size of @bitmap in bytes
 *
 * This is a mono internal function.
 * The @bitmap data is compressed into a format that is small but
 * still searchable in few instructions by the JIT and runtime.
 * The compressed data is stored in the buffer pointed to by the
 * @dest array. Passing a #NULL value for @dest allows to just compute
 * the size of the buffer.
 * This compression algorithm assumes the bits set in the bitmap are
 * few and far between, like in interface bitmaps.
 * Returns: the size of the compressed bitmap in bytes.
 */
int
mono_compress_bitmap (uint8_t *dest, const uint8_t *bitmap, int size)
{
        int numz = 0;
        int res = 0;
        const uint8_t *end = bitmap + size;
        while (bitmap < end) {
                if (*bitmap || numz == 255) {
                        if (dest) {
                                *dest++ = numz;
                                *dest++ = *bitmap;
                        }
                        res += 2;
                        numz = 0;
                        bitmap++;
                        continue;
                }
                bitmap++;
                numz++;
        }
        if (numz) {
                res += 2;
                if (dest) {
                        *dest++ = numz;
                        *dest++ = 0;
                }
        }
        return res;
}

/**
 * mono_class_interface_match:
 * @bitmap: a compressed bitmap buffer
 * @id: the index to check in the bitmap
 *
 * This is a mono internal function.
 * Checks if a bit is set in a compressed interface bitmap. @id must
 * be already checked for being smaller than the maximum id encoded in the
 * bitmap.
 *
 * Returns: a non-zero value if bit @id is set in the bitmap @bitmap,
 * #FALSE otherwise.
 */
int
mono_class_interface_match (const uint8_t *bitmap, int id)
{
        while (TRUE) {
                id -= bitmap [0] * 8;
                if (id < 8) {
                        if (id < 0)
                                return 0;
                        return bitmap [1] & (1 << id);
                }
                bitmap += 2;
                id -= 8;
        }
}
#endif

/*
 * LOCKING: this is supposed to be called with the loader lock held.
 * Return -1 on failure and set exception_type
 */
static int
setup_interface_offsets (MonoClass *class, int cur_slot)
{
        MonoError error;
        MonoClass *k, *ic;
        int i, j, max_iid, num_ifaces;
        MonoClass **interfaces_full = NULL;
        int *interface_offsets_full = NULL;
        GPtrArray *ifaces;
        GPtrArray **ifaces_array = NULL;
        int interface_offsets_count;
        MonoClass **array_interfaces = NULL;
        int num_array_interfaces;
        int is_enumerator = FALSE;

        mono_class_setup_supertypes (class);
        /* 
         * get the implicit generic interfaces for either the arrays or for System.Array/InternalEnumerator<T>
         * implicit interfaces have the property that they are assigned the same slot in the
         * vtables for compatible interfaces
         */
        array_interfaces = get_implicit_generic_array_interfaces (class, &num_array_interfaces, &is_enumerator);

        /* compute maximum number of slots and maximum interface id */
        max_iid = 0;
        num_ifaces = num_array_interfaces; /* this can include duplicated ones */
        ifaces_array = g_new0 (GPtrArray *, class->idepth);
        for (j = 0; j < class->idepth; j++) {
                k = class->supertypes [j];
                num_ifaces += k->interface_count;
                for (i = 0; i < k->interface_count; i++) {
                        ic = k->interfaces [i];

                        if (!ic->inited)
                                mono_class_init (ic);

                        if (max_iid < ic->interface_id)
                                max_iid = ic->interface_id;
                }
                ifaces = mono_class_get_implemented_interfaces (k, &error);
                if (!mono_error_ok (&error)) {
                        char *name = mono_type_get_full_name (k);
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Error getting the interfaces of %s due to %s", name, mono_error_get_message (&error)));
                        g_free (name);
                        mono_error_cleanup (&error);
                        cur_slot = -1;
                        goto end;
                }
                if (ifaces) {
                        num_ifaces += ifaces->len;
                        for (i = 0; i < ifaces->len; ++i) {
                                ic = g_ptr_array_index (ifaces, i);
                                if (max_iid < ic->interface_id)
                                        max_iid = ic->interface_id;
                        }
                        ifaces_array [j] = ifaces;
                }
        }

        for (i = 0; i < num_array_interfaces; ++i) {
                ic = array_interfaces [i];
                mono_class_init (ic);
                if (max_iid < ic->interface_id)
                        max_iid = ic->interface_id;
        }

        if (MONO_CLASS_IS_INTERFACE (class)) {
                num_ifaces++;
                if (max_iid < class->interface_id)
                        max_iid = class->interface_id;
        }
        class->max_interface_id = max_iid;
        /* compute vtable offset for interfaces */
        interfaces_full = g_malloc0 (sizeof (MonoClass*) * num_ifaces);
        interface_offsets_full = g_malloc (sizeof (int) * num_ifaces);

        for (i = 0; i < num_ifaces; i++) {
                interface_offsets_full [i] = -1;
        }

        /* skip the current class */
        for (j = 0; j < class->idepth - 1; j++) {
                k = class->supertypes [j];
                ifaces = ifaces_array [j];

                if (ifaces) {
                        for (i = 0; i < ifaces->len; ++i) {
                                int io;
                                ic = g_ptr_array_index (ifaces, i);
                                
                                /*Force the sharing of interface offsets between parent and subtypes.*/
                                io = mono_class_interface_offset (k, ic);
                                g_assert (io >= 0);
                                set_interface_and_offset (num_ifaces, interfaces_full, interface_offsets_full, ic, io, TRUE);
                        }
                }
        }

        g_assert (class == class->supertypes [class->idepth - 1]);
        ifaces = ifaces_array [class->idepth - 1];
        if (ifaces) {
                for (i = 0; i < ifaces->len; ++i) {
                        int count;
                        ic = g_ptr_array_index (ifaces, i);
                        if (set_interface_and_offset (num_ifaces, interfaces_full, interface_offsets_full, ic, cur_slot, FALSE))
                                continue;
                        count = count_virtual_methods (ic);
                        if (count == -1) {
                                char *name = mono_type_get_full_name (ic);
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Error calculating interface offset of %s", name));
                                g_free (name);
                                cur_slot = -1;
                                goto end;
                        }
                        cur_slot += count;
                }
        }

        if (MONO_CLASS_IS_INTERFACE (class))
                set_interface_and_offset (num_ifaces, interfaces_full, interface_offsets_full, class, cur_slot, TRUE);

        if (num_array_interfaces) {
                if (is_enumerator) {
                        int ienumerator_idx = find_array_interface (class, "IEnumerator`1");
                        int ienumerator_offset = find_interface_offset (num_ifaces, interfaces_full, interface_offsets_full, class->interfaces [ienumerator_idx]);
                        g_assert (ienumerator_offset >= 0);
                        for (i = 0; i < num_array_interfaces; ++i) {
                                ic = array_interfaces [i];
                                if (strcmp (ic->name, "IEnumerator`1") == 0)
                                        set_interface_and_offset (num_ifaces, interfaces_full, interface_offsets_full, ic, ienumerator_offset, TRUE);
                                else
                                        g_assert_not_reached ();
                                /*g_print ("type %s has %s offset at %d (%s)\n", class->name, ic->name, interface_offsets_full [ic->interface_id], class->interfaces [0]->name);*/
                        }
                } else {
                        int ilist_offset, icollection_offset, ienumerable_offset;
                        int ilist_iface_idx = find_array_interface (class, "IList`1");
                        MonoClass* ilist_class = class->interfaces [ilist_iface_idx];
                        int icollection_iface_idx = find_array_interface (ilist_class, "ICollection`1");
                        int ienumerable_iface_idx = find_array_interface (ilist_class, "IEnumerable`1");
                        ilist_offset = find_interface_offset (num_ifaces, interfaces_full, interface_offsets_full, class->interfaces [ilist_iface_idx]);
                        icollection_offset = find_interface_offset (num_ifaces, interfaces_full, interface_offsets_full, ilist_class->interfaces [icollection_iface_idx]);
                        ienumerable_offset = find_interface_offset (num_ifaces, interfaces_full, interface_offsets_full, ilist_class->interfaces [ienumerable_iface_idx]);
                        g_assert (ilist_offset >= 0 && icollection_offset >= 0 && ienumerable_offset >= 0);
                        for (i = 0; i < num_array_interfaces; ++i) {
                                int offset;
                                ic = array_interfaces [i];
                                if (ic->generic_class->container_class == mono_defaults.generic_ilist_class)
                                        offset = ilist_offset;
                                else if (strcmp (ic->name, "ICollection`1") == 0)
                                        offset = icollection_offset;
                                else if (strcmp (ic->name, "IEnumerable`1") == 0)
                                        offset = ienumerable_offset;
                                else
                                        g_assert_not_reached ();
                                set_interface_and_offset (num_ifaces, interfaces_full, interface_offsets_full, ic, offset, TRUE);
                                /*g_print ("type %s has %s offset at %d (%s)\n", class->name, ic->name, offset, class->interfaces [0]->name);*/
                        }
                }
        }

        for (interface_offsets_count = 0, i = 0; i < num_ifaces; i++) {
                if (interface_offsets_full [i] != -1) {
                        interface_offsets_count ++;
                }
        }

        /*
         * We might get called twice: once from mono_class_init () then once from 
         * mono_class_setup_vtable ().
         */
        if (class->interfaces_packed) {
                g_assert (class->interface_offsets_count == interface_offsets_count);
        } else {
                uint8_t *bitmap;
                int bsize;
                class->interface_offsets_count = interface_offsets_count;
                class->interfaces_packed = mono_class_alloc (class, sizeof (MonoClass*) * interface_offsets_count);
                class->interface_offsets_packed = mono_class_alloc (class, sizeof (guint16) * interface_offsets_count);
                bsize = (sizeof (guint8) * ((max_iid + 1) >> 3)) + (((max_iid + 1) & 7)? 1 :0);
#ifdef COMPRESSED_INTERFACE_BITMAP
                bitmap = g_malloc0 (bsize);
#else
                bitmap = mono_class_alloc0 (class, bsize);
#endif
                for (i = 0; i < interface_offsets_count; i++) {
                        int id = interfaces_full [i]->interface_id;
                        bitmap [id >> 3] |= (1 << (id & 7));
                        class->interfaces_packed [i] = interfaces_full [i];
                        class->interface_offsets_packed [i] = interface_offsets_full [i];
                        /*if (num_array_interfaces)
                          g_print ("type %s has %s offset at %d\n", mono_type_get_name_full (&class->byval_arg, 0), mono_type_get_name_full (&interfaces_full [i]->byval_arg, 0), interface_offsets_full [i]);*/
                }
#ifdef COMPRESSED_INTERFACE_BITMAP
                i = mono_compress_bitmap (NULL, bitmap, bsize);
                class->interface_bitmap = mono_class_alloc0 (class, i);
                mono_compress_bitmap (class->interface_bitmap, bitmap, bsize);
                g_free (bitmap);
#else
                class->interface_bitmap = bitmap;
#endif
        }

end:
        g_free (interfaces_full);
        g_free (interface_offsets_full);
        g_free (array_interfaces);
        for (i = 0; i < class->idepth; i++) {
                ifaces = ifaces_array [i];
                if (ifaces)
                        g_ptr_array_free (ifaces, TRUE);
        }
        g_free (ifaces_array);
        
        //printf ("JUST DONE: ");
        //print_implemented_interfaces (class);
 
        return cur_slot;
}

/*
 * Setup interface offsets for interfaces. 
 * Initializes:
 * - class->max_interface_id
 * - class->interface_offsets_count
 * - class->interfaces_packed
 * - class->interface_offsets_packed
 * - class->interface_bitmap
 *
 * This function can fail @class.
 */
void
mono_class_setup_interface_offsets (MonoClass *class)
{
        mono_loader_lock ();

        setup_interface_offsets (class, 0);

        mono_loader_unlock ();
}
 
/*
 * mono_class_setup_vtable:
 *
 *   Creates the generic vtable of CLASS.
 * Initializes the following fields in MonoClass:
 * - vtable
 * - vtable_size
 * Plus all the fields initialized by setup_interface_offsets ().
 * If there is an error during vtable construction, class->exception_type is set.
 *
 * LOCKING: Acquires the loader lock.
 */
void
mono_class_setup_vtable (MonoClass *class)
{
        MonoMethod **overrides;
        MonoGenericContext *context;
        guint32 type_token;
        int onum = 0;
        gboolean ok = TRUE;

        if (class->vtable)
                return;

        if (mono_debug_using_mono_debugger ())
                /* The debugger currently depends on this */
                mono_class_setup_methods (class);

        if (MONO_CLASS_IS_INTERFACE (class)) {
                /* This sets method->slot for all methods if this is an interface */
                mono_class_setup_methods (class);
                return;
        }

        if (class->exception_type)
                return;

        mono_loader_lock ();

        if (class->vtable) {
                mono_loader_unlock ();
                return;
        }

        mono_stats.generic_vtable_count ++;

        if (class->generic_class) {
                context = mono_class_get_context (class);
                type_token = class->generic_class->container_class->type_token;
        } else {
                context = (MonoGenericContext *) class->generic_container;              
                type_token = class->type_token;
        }

        if (class->image->dynamic) {
                /* Generic instances can have zero method overrides without causing any harm.
                 * This is true since we don't do layout all over again for them, we simply inflate
                 * the layout of the parent.
                 */
                mono_reflection_get_dynamic_overrides (class, &overrides, &onum);
        } else {
                /* The following call fails if there are missing methods in the type */
                /* FIXME it's probably a good idea to avoid this for generic instances. */
                ok = mono_class_get_overrides_full (class->image, type_token, &overrides, &onum, context);
        }

        if (ok)
                mono_class_setup_vtable_general (class, overrides, onum);
                
        g_free (overrides);

        mono_loader_unlock ();

        return;
}

#define DEBUG_INTERFACE_VTABLE_CODE 0
#define TRACE_INTERFACE_VTABLE_CODE 0
#define VERIFY_INTERFACE_VTABLE_CODE 0
#define VTABLE_SELECTOR (1)

#if (TRACE_INTERFACE_VTABLE_CODE|DEBUG_INTERFACE_VTABLE_CODE)
#define DEBUG_INTERFACE_VTABLE(stmt) do {\
        if (!(VTABLE_SELECTOR)) break; \
        stmt;\
} while (0)
#else
#define DEBUG_INTERFACE_VTABLE(stmt)
#endif

#if TRACE_INTERFACE_VTABLE_CODE
#define TRACE_INTERFACE_VTABLE(stmt) do {\
        if (!(VTABLE_SELECTOR)) break; \
        stmt;\
} while (0)
#else
#define TRACE_INTERFACE_VTABLE(stmt)
#endif

#if VERIFY_INTERFACE_VTABLE_CODE
#define VERIFY_INTERFACE_VTABLE(stmt) do {\
        if (!(VTABLE_SELECTOR)) break; \
        stmt;\
} while (0)
#else
#define VERIFY_INTERFACE_VTABLE(stmt)
#endif


#if (TRACE_INTERFACE_VTABLE_CODE|DEBUG_INTERFACE_VTABLE_CODE)
static char*
mono_signature_get_full_desc (MonoMethodSignature *sig, gboolean include_namespace)
{
        int i;
        char *result;
        GString *res = g_string_new ("");
        
        g_string_append_c (res, '(');
        for (i = 0; i < sig->param_count; ++i) {
                if (i > 0)
                        g_string_append_c (res, ',');
                mono_type_get_desc (res, sig->params [i], include_namespace);
        }
        g_string_append (res, ")=>");
        if (sig->ret != NULL) {
                mono_type_get_desc (res, sig->ret, include_namespace);
        } else {
                g_string_append (res, "NULL");
        }
        result = res->str;
        g_string_free (res, FALSE);
        return result;
}
static void
print_method_signatures (MonoMethod *im, MonoMethod *cm) {
        char *im_sig = mono_signature_get_full_desc (mono_method_signature (im), TRUE);
        char *cm_sig = mono_signature_get_full_desc (mono_method_signature (cm), TRUE);
        printf ("(IM \"%s\", CM \"%s\")", im_sig, cm_sig);
        g_free (im_sig);
        g_free (cm_sig);
        
}

#endif
static gboolean
check_interface_method_override (MonoClass *class, MonoMethod *im, MonoMethod *cm, gboolean require_newslot, gboolean interface_is_explicitly_implemented_by_class, gboolean slot_is_empty, gboolean security_enabled) {
        MonoMethodSignature *cmsig, *imsig;
        if (strcmp (im->name, cm->name) == 0) {
                if (! (cm->flags & METHOD_ATTRIBUTE_PUBLIC)) {
                        TRACE_INTERFACE_VTABLE (printf ("[PUBLIC CHECK FAILED]"));
                        return FALSE;
                }
                if (! slot_is_empty) {
                        if (require_newslot) {
                                if (! interface_is_explicitly_implemented_by_class) {
                                        TRACE_INTERFACE_VTABLE (printf ("[NOT EXPLICIT IMPLEMENTATION IN FULL SLOT REFUSED]"));
                                        return FALSE;
                                }
                                if (! (cm->flags & METHOD_ATTRIBUTE_NEW_SLOT)) {
                                        TRACE_INTERFACE_VTABLE (printf ("[NEWSLOT CHECK FAILED]"));
                                        return FALSE;
                                }
                        } else {
                                TRACE_INTERFACE_VTABLE (printf ("[FULL SLOT REFUSED]"));
                        }
                }
                cmsig = mono_method_signature (cm);
                imsig = mono_method_signature (im);
                if (!cmsig || !imsig) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Could not resolve the signature of a virtual method"));
                        return FALSE;
                }

                if (! mono_metadata_signature_equal (cmsig, imsig)) {
                        TRACE_INTERFACE_VTABLE (printf ("[SIGNATURE CHECK FAILED  "));
                        TRACE_INTERFACE_VTABLE (print_method_signatures (im, cm));
                        TRACE_INTERFACE_VTABLE (printf ("]"));
                        return FALSE;
                }
                TRACE_INTERFACE_VTABLE (printf ("[SECURITY CHECKS]"));
                /* CAS - SecurityAction.InheritanceDemand on interface */
                if (security_enabled && (im->flags & METHOD_ATTRIBUTE_HAS_SECURITY)) {
                        mono_secman_inheritancedemand_method (cm, im);
                }

                if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                        mono_security_core_clr_check_override (class, cm, im);
                TRACE_INTERFACE_VTABLE (printf ("[NAME CHECK OK]"));
                return TRUE;
        } else {
                MonoClass *ic = im->klass;
                const char *ic_name_space = ic->name_space;
                const char *ic_name = ic->name;
                char *subname;
                
                if (! require_newslot) {
                        TRACE_INTERFACE_VTABLE (printf ("[INJECTED METHOD REFUSED]"));
                        return FALSE;
                }
                if (cm->klass->rank == 0) {
                        TRACE_INTERFACE_VTABLE (printf ("[RANK CHECK FAILED]"));
                        return FALSE;
                }
                if (! mono_metadata_signature_equal (mono_method_signature (cm), mono_method_signature (im))) {
                        TRACE_INTERFACE_VTABLE (printf ("[(INJECTED) SIGNATURE CHECK FAILED  "));
                        TRACE_INTERFACE_VTABLE (print_method_signatures (im, cm));
                        TRACE_INTERFACE_VTABLE (printf ("]"));
                        return FALSE;
                }
                if (mono_class_get_image (ic) != mono_defaults.corlib) {
                        TRACE_INTERFACE_VTABLE (printf ("[INTERFACE CORLIB CHECK FAILED]"));
                        return FALSE;
                }
                if ((ic_name_space == NULL) || (strcmp (ic_name_space, "System.Collections.Generic") != 0)) {
                        TRACE_INTERFACE_VTABLE (printf ("[INTERFACE NAMESPACE CHECK FAILED]"));
                        return FALSE;
                }
                if ((ic_name == NULL) || ((strcmp (ic_name, "IEnumerable`1") != 0) && (strcmp (ic_name, "ICollection`1") != 0) && (strcmp (ic_name, "IList`1") != 0))) {
                        TRACE_INTERFACE_VTABLE (printf ("[INTERFACE NAME CHECK FAILED]"));
                        return FALSE;
                }
                
                subname = strstr (cm->name, ic_name_space);
                if (subname != cm->name) {
                        TRACE_INTERFACE_VTABLE (printf ("[ACTUAL NAMESPACE CHECK FAILED]"));
                        return FALSE;
                }
                subname += strlen (ic_name_space);
                if (subname [0] != '.') {
                        TRACE_INTERFACE_VTABLE (printf ("[FIRST DOT CHECK FAILED]"));
                        return FALSE;
                }
                subname ++;
                if (strstr (subname, ic_name) != subname) {
                        TRACE_INTERFACE_VTABLE (printf ("[ACTUAL CLASS NAME CHECK FAILED]"));
                        return FALSE;
                }
                subname += strlen (ic_name);
                if (subname [0] != '.') {
                        TRACE_INTERFACE_VTABLE (printf ("[SECOND DOT CHECK FAILED]"));
                        return FALSE;
                }
                subname ++;
                if (strcmp (subname, im->name) != 0) {
                        TRACE_INTERFACE_VTABLE (printf ("[METHOD NAME CHECK FAILED]"));
                        return FALSE;
                }
                
                TRACE_INTERFACE_VTABLE (printf ("[SECURITY CHECKS (INJECTED CASE)]"));
                /* CAS - SecurityAction.InheritanceDemand on interface */
                if (security_enabled && (im->flags & METHOD_ATTRIBUTE_HAS_SECURITY)) {
                        mono_secman_inheritancedemand_method (cm, im);
                }

                if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                        mono_security_core_clr_check_override (class, cm, im);
                
                TRACE_INTERFACE_VTABLE (printf ("[INJECTED INTERFACE CHECK OK]"));
                return TRUE;
        }
}

#if (TRACE_INTERFACE_VTABLE_CODE|DEBUG_INTERFACE_VTABLE_CODE)
static void
foreach_override (gpointer key, gpointer value, gpointer user_data) {
        MonoMethod *method = key;
        MonoMethod *override = value;
        MonoClass *method_class = mono_method_get_class (method);
        MonoClass *override_class = mono_method_get_class (override);
        
        printf ("  Method '%s.%s:%s' has override '%s.%s:%s'\n",
                        mono_class_get_namespace (method_class), mono_class_get_name (method_class), mono_method_get_name (method),
                        mono_class_get_namespace (override_class), mono_class_get_name (override_class), mono_method_get_name (override));
}
static void
print_overrides (GHashTable *override_map, const char *message) {
        if (override_map) {
                printf ("Override map \"%s\" START:\n", message);
                g_hash_table_foreach (override_map, foreach_override, NULL);
                printf ("Override map \"%s\" END.\n", message);
        } else {
                printf ("Override map \"%s\" EMPTY.\n", message);
        }
}
static void
print_vtable_full (MonoClass *class, MonoMethod** vtable, int size, int first_non_interface_slot, const char *message, gboolean print_interfaces) {
        char *full_name = mono_type_full_name (&class->byval_arg);
        int i;
        int parent_size;
        
        printf ("*** Vtable for class '%s' at \"%s\" (size %d)\n", full_name, message, size);
        
        if (print_interfaces) {
                print_implemented_interfaces (class);
                printf ("* Interfaces for class '%s' done.\nStarting vtable (size %d):\n", full_name, size);
        }
        
        if (class->parent) {
                parent_size = class->parent->vtable_size;
        } else {
                parent_size = 0;
        }
        for (i = 0; i < size; ++i) {
                MonoMethod *cm = vtable [i];
                if (cm) {
                        char *cm_name = mono_method_full_name (cm, TRUE);
                        char newness = (i < parent_size) ? 'O' : ((i < first_non_interface_slot) ? 'I' : 'N');
                        printf ("  [%c][%03d][INDEX %03d] %s\n", newness, i, cm->slot, cm_name);
                        g_free (cm_name);
                }
        }

        g_free (full_name);
}
#endif

#if VERIFY_INTERFACE_VTABLE_CODE
static int
mono_method_try_get_vtable_index (MonoMethod *method)
{
        if (method->is_inflated && (method->flags & METHOD_ATTRIBUTE_VIRTUAL)) {
                MonoMethodInflated *imethod = (MonoMethodInflated*)method;
                if (imethod->declaring->is_generic)
                        return imethod->declaring->slot;
        }
        return method->slot;
}

static void
mono_class_verify_vtable (MonoClass *class)
{
        int i;
        char *full_name = mono_type_full_name (&class->byval_arg);

        printf ("*** Verifying VTable of class '%s' \n", full_name);
        g_free (full_name);
        full_name = NULL;
        
        if (!class->methods)
                return;

        for (i = 0; i < class->method.count; ++i) {
                MonoMethod *cm = class->methods [i];
                int slot;

                if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL))
                        continue;

                g_free (full_name);
                full_name = mono_method_full_name (cm, TRUE);

                slot = mono_method_try_get_vtable_index (cm);
                if (slot >= 0) {
                        if (slot >= class->vtable_size) {
                                printf ("\tInvalid method %s at index %d with vtable of length %d\n", full_name, slot, class->vtable_size);
                                continue;
                        }

                        if (slot >= 0 && class->vtable [slot] != cm && (class->vtable [slot])) {
                                char *other_name = class->vtable [slot] ? mono_method_full_name (class->vtable [slot], TRUE) : g_strdup ("[null value]");
                                printf ("\tMethod %s has slot %d but vtable has %s on it\n", full_name, slot, other_name);
                                g_free (other_name);
                        }
                } else
                        printf ("\tVirtual method %s does n't have an assigned slot\n", full_name);
        }
        g_free (full_name);
}
#endif

static void
print_unimplemented_interface_method_info (MonoClass *class, MonoClass *ic, MonoMethod *im, int im_slot, MonoMethod **overrides, int onum) {
        int index;
        char *method_signature;
        char *type_name;
        
        for (index = 0; index < onum; ++index) {
                g_print (" at slot %d: %s (%d) overrides %s (%d)\n", im_slot, overrides [index*2+1]->name, 
                         overrides [index*2+1]->slot, overrides [index*2]->name, overrides [index*2]->slot);
        }
        method_signature = mono_signature_get_desc (mono_method_signature (im), FALSE);
        type_name = mono_type_full_name (&class->byval_arg);
        printf ("no implementation for interface method %s::%s(%s) in class %s\n",
                mono_type_get_name (&ic->byval_arg), im->name, method_signature, type_name);
        g_free (method_signature);
        g_free (type_name);
        mono_class_setup_methods (class);
        if (class->exception_type) {
                char *name = mono_type_get_full_name (class);
                printf ("CLASS %s failed to resolve methods\n", name);
                g_free (name);
                return;
        }
        for (index = 0; index < class->method.count; ++index) {
                MonoMethod *cm = class->methods [index];
                method_signature = mono_signature_get_desc (mono_method_signature (cm), TRUE);

                printf ("METHOD %s(%s)\n", cm->name, method_signature);
                g_free (method_signature);
        }
}

static gboolean
verify_class_overrides (MonoClass *class, MonoMethod **overrides, int onum)
{
        int i;

        for (i = 0; i < onum; ++i) {
                MonoMethod *decl = overrides [i * 2];
                MonoMethod *body = overrides [i * 2 + 1];

                if (mono_class_get_generic_type_definition (body->klass) != mono_class_get_generic_type_definition (class)) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Method belongs to a different class than the declared one"));
                        return FALSE;
                }

                if (!(body->flags & METHOD_ATTRIBUTE_VIRTUAL) || (body->flags & METHOD_ATTRIBUTE_STATIC)) {
                        if (body->flags & METHOD_ATTRIBUTE_STATIC)
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Method must not be static to override a base type"));
                        else
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Method must be virtual to override a base type"));
                        return FALSE;
                }

                if (!(decl->flags & METHOD_ATTRIBUTE_VIRTUAL) || (decl->flags & METHOD_ATTRIBUTE_STATIC)) {
                        if (body->flags & METHOD_ATTRIBUTE_STATIC)
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Cannot override a static method in a base type"));
                        else
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Cannot override a non virtual method in a base type"));
                        return FALSE;
                }

                if (!mono_class_is_assignable_from_slow (decl->klass, class)) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Method overrides a class or interface that extended or implemented by this type"));
                        return FALSE;
                }
        }
        return TRUE;
}
/*
 * LOCKING: this is supposed to be called with the loader lock held.
 */
void
mono_class_setup_vtable_general (MonoClass *class, MonoMethod **overrides, int onum)
{
        MonoError error;
        MonoClass *k, *ic;
        MonoMethod **vtable;
        int i, max_vtsize = 0, max_iid, cur_slot = 0;
        GPtrArray *ifaces = NULL;
        GHashTable *override_map = NULL;
        gboolean security_enabled = mono_is_security_manager_active ();
        MonoMethod *cm;
        gpointer class_iter;
#if (DEBUG_INTERFACE_VTABLE_CODE|TRACE_INTERFACE_VTABLE_CODE)
        int first_non_interface_slot;
#endif
        GSList *virt_methods = NULL, *l;

        if (class->vtable)
                return;

        if (overrides && !verify_class_overrides (class, overrides, onum))
                return;

        ifaces = mono_class_get_implemented_interfaces (class, &error);
        if (!mono_error_ok (&error)) {
                char *name = mono_type_get_full_name (class);
                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Could not resolve %s interfaces due to %s", name, mono_error_get_message (&error)));
                g_free (name);
                mono_error_cleanup (&error);
                return;
        } else if (ifaces) {
                for (i = 0; i < ifaces->len; i++) {
                        MonoClass *ic = g_ptr_array_index (ifaces, i);
                        max_vtsize += ic->method.count;
                }
                g_ptr_array_free (ifaces, TRUE);
                ifaces = NULL;
        }
        
        if (class->parent) {
                mono_class_init (class->parent);
                mono_class_setup_vtable (class->parent);

                if (class->parent->exception_type) {
                        char *name = mono_type_get_full_name (class->parent);
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Parent %s failed to load", name));
                        g_free (name);
                        return;
                }

                max_vtsize += class->parent->vtable_size;
                cur_slot = class->parent->vtable_size;
        }

        max_vtsize += class->method.count;

        vtable = alloca (sizeof (gpointer) * max_vtsize);
        memset (vtable, 0, sizeof (gpointer) * max_vtsize);

        /* printf ("METAINIT %s.%s\n", class->name_space, class->name); */

        cur_slot = setup_interface_offsets (class, cur_slot);
        if (cur_slot == -1) /*setup_interface_offsets fails the type.*/
                return;

        max_iid = class->max_interface_id;
        DEBUG_INTERFACE_VTABLE (first_non_interface_slot = cur_slot);

        /* Optimized version for generic instances */
        if (class->generic_class) {
                MonoError error;
                MonoClass *gklass = class->generic_class->container_class;
                MonoMethod **tmp;

                mono_class_setup_vtable (gklass);
                if (gklass->exception_type != MONO_EXCEPTION_NONE) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        return;
                }

                tmp = mono_class_alloc0 (class, sizeof (gpointer) * gklass->vtable_size);
                class->vtable_size = gklass->vtable_size;
                for (i = 0; i < gklass->vtable_size; ++i)
                        if (gklass->vtable [i]) {
                                MonoMethod *inflated = mono_class_inflate_generic_method_full_checked (gklass->vtable [i], class, mono_class_get_context (class), &error);
                                if (!mono_error_ok (&error)) {
                                        char *err_msg = g_strdup_printf ("Could not inflate method due to %s", mono_error_get_message (&error));
                                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, err_msg);
                                        g_free (err_msg);
                                        mono_error_cleanup (&error);
                                        return;
                                }
                                tmp [i] = inflated;
                                tmp [i]->slot = gklass->vtable [i]->slot;
                        }
                mono_memory_barrier ();
                class->vtable = tmp;

                /* Have to set method->slot for abstract virtual methods */
                if (class->methods && gklass->methods) {
                        for (i = 0; i < class->method.count; ++i)
                                if (class->methods [i]->slot == -1)
                                        class->methods [i]->slot = gklass->methods [i]->slot;
                }

                return;
        }

        if (class->parent && class->parent->vtable_size) {
                MonoClass *parent = class->parent;
                int i;
                
                memcpy (vtable, parent->vtable,  sizeof (gpointer) * parent->vtable_size);
                
                // Also inherit parent interface vtables, just as a starting point.
                // This is needed otherwise bug-77127.exe fails when the property methods
                // have different names in the iterface and the class, because for child
                // classes the ".override" information is not used anymore.
                for (i = 0; i < parent->interface_offsets_count; i++) {
                        MonoClass *parent_interface = parent->interfaces_packed [i];
                        int interface_offset = mono_class_interface_offset (class, parent_interface);
                        /*FIXME this is now dead code as this condition will never hold true.
                        Since interface offsets are inherited then the offset of an interface implemented
                        by a parent will never be the out of it's vtable boundary.
                        */
                        if (interface_offset >= parent->vtable_size) {
                                int parent_interface_offset = mono_class_interface_offset (parent, parent_interface);
                                int j;
                                
                                mono_class_setup_methods (parent_interface); /*FIXME Just kill this whole chunk of dead code*/
                                TRACE_INTERFACE_VTABLE (printf ("    +++ Inheriting interface %s.%s\n", parent_interface->name_space, parent_interface->name));
                                for (j = 0; j < parent_interface->method.count && !class->exception_type; j++) {
                                        vtable [interface_offset + j] = parent->vtable [parent_interface_offset + j];
                                        TRACE_INTERFACE_VTABLE (printf ("    --- Inheriting: [%03d][(%03d)+(%03d)] => [%03d][(%03d)+(%03d)]\n",
                                                        parent_interface_offset + j, parent_interface_offset, j,
                                                        interface_offset + j, interface_offset, j));
                                }
                        }
                        
                }
        }

        TRACE_INTERFACE_VTABLE (print_vtable_full (class, vtable, cur_slot, first_non_interface_slot, "AFTER INHERITING PARENT VTABLE", TRUE));
        /* override interface methods */
        for (i = 0; i < onum; i++) {
                MonoMethod *decl = overrides [i*2];
                if (MONO_CLASS_IS_INTERFACE (decl->klass)) {
                        int dslot;
                        dslot = mono_method_get_vtable_slot (decl);
                        if (dslot == -1) {
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                return;
                        }

                        dslot += mono_class_interface_offset (class, decl->klass);
                        vtable [dslot] = overrides [i*2 + 1];
                        vtable [dslot]->slot = dslot;
                        if (!override_map)
                                override_map = g_hash_table_new (mono_aligned_addr_hash, NULL);

                        g_hash_table_insert (override_map, overrides [i * 2], overrides [i * 2 + 1]);

                        if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                                mono_security_core_clr_check_override (class, vtable [dslot], decl);
                }
        }
        TRACE_INTERFACE_VTABLE (print_overrides (override_map, "AFTER OVERRIDING INTERFACE METHODS"));
        TRACE_INTERFACE_VTABLE (print_vtable_full (class, vtable, cur_slot, first_non_interface_slot, "AFTER OVERRIDING INTERFACE METHODS", FALSE));

        /*
         * Create a list of virtual methods to avoid calling 
         * mono_class_get_virtual_methods () which is slow because of the metadata
         * optimization.
         */
        {
                gpointer iter = NULL;
                MonoMethod *cm;

                virt_methods = NULL;
                while ((cm = mono_class_get_virtual_methods (class, &iter))) {
                        virt_methods = g_slist_prepend (virt_methods, cm);
                }
                if (class->exception_type)
                        goto fail;
        }
        
        // Loop on all implemented interfaces...
        for (i = 0; i < class->interface_offsets_count; i++) {
                MonoClass *parent = class->parent;
                int ic_offset;
                gboolean interface_is_explicitly_implemented_by_class;
                int im_index;
                
                ic = class->interfaces_packed [i];
                ic_offset = mono_class_interface_offset (class, ic);

                mono_class_setup_methods (ic);
                if (ic->exception_type)
                        goto fail;
                
                // Check if this interface is explicitly implemented (instead of just inherited)
                if (parent != NULL) {
                        int implemented_interfaces_index;
                        interface_is_explicitly_implemented_by_class = FALSE;
                        for (implemented_interfaces_index = 0; implemented_interfaces_index < class->interface_count; implemented_interfaces_index++) {
                                if (ic == class->interfaces [implemented_interfaces_index]) {
                                        interface_is_explicitly_implemented_by_class = TRUE;
                                        break;
                                }
                        }
                } else {
                        interface_is_explicitly_implemented_by_class = TRUE;
                }
                
                // Loop on all interface methods...
                for (im_index = 0; im_index < ic->method.count; im_index++) {
                        MonoMethod *im = ic->methods [im_index];
                        int im_slot = ic_offset + im->slot;
                        MonoMethod *override_im = (override_map != NULL) ? g_hash_table_lookup (override_map, im) : NULL;
                        
                        if (im->flags & METHOD_ATTRIBUTE_STATIC)
                                continue;

                        // If there is an explicit implementation, just use it right away,
                        // otherwise look for a matching method
                        if (override_im == NULL) {
                                int cm_index;
                                gpointer iter;
                                MonoMethod *cm;

                                // First look for a suitable method among the class methods
                                iter = NULL;
                                for (l = virt_methods; l; l = l->next) {
                                        cm = l->data;
                                        TRACE_INTERFACE_VTABLE (printf ("    For slot %d ('%s'.'%s':'%s'), trying method '%s'.'%s':'%s'... [EXPLICIT IMPLEMENTATION = %d][SLOT IS NULL = %d]", im_slot, ic->name_space, ic->name, im->name, cm->klass->name_space, cm->klass->name, cm->name, interface_is_explicitly_implemented_by_class, (vtable [im_slot] == NULL)));
                                        if (check_interface_method_override (class, im, cm, TRUE, interface_is_explicitly_implemented_by_class, (vtable [im_slot] == NULL), security_enabled)) {
                                                TRACE_INTERFACE_VTABLE (printf ("[check ok]: ASSIGNING"));
                                                vtable [im_slot] = cm;
                                                /* Why do we need this? */
                                                if (cm->slot < 0) {
                                                        cm->slot = im_slot;
                                                }
                                        }
                                        TRACE_INTERFACE_VTABLE (printf ("\n"));
                                        if (class->exception_type)  /*Might be set by check_interface_method_override*/ 
                                                goto fail;
                                }
                                
                                // If the slot is still empty, look in all the inherited virtual methods...
                                if ((vtable [im_slot] == NULL) && class->parent != NULL) {
                                        MonoClass *parent = class->parent;
                                        // Reverse order, so that last added methods are preferred
                                        for (cm_index = parent->vtable_size - 1; cm_index >= 0; cm_index--) {
                                                MonoMethod *cm = parent->vtable [cm_index];
                                                
                                                TRACE_INTERFACE_VTABLE ((cm != NULL) && printf ("    For slot %d ('%s'.'%s':'%s'), trying (ancestor) method '%s'.'%s':'%s'... ", im_slot, ic->name_space, ic->name, im->name, cm->klass->name_space, cm->klass->name, cm->name));
                                                if ((cm != NULL) && check_interface_method_override (class, im, cm, FALSE, FALSE, TRUE, security_enabled)) {
                                                        TRACE_INTERFACE_VTABLE (printf ("[everything ok]: ASSIGNING"));
                                                        vtable [im_slot] = cm;
                                                        /* Why do we need this? */
                                                        if (cm->slot < 0) {
                                                                cm->slot = im_slot;
                                                        }
                                                        break;
                                                }
                                                if (class->exception_type) /*Might be set by check_interface_method_override*/ 
                                                        goto fail;
                                                TRACE_INTERFACE_VTABLE ((cm != NULL) && printf ("\n"));
                                        }
                                }
                        } else {
                                g_assert (vtable [im_slot] == override_im);
                        }
                }
        }
        
        // If the class is not abstract, check that all its interface slots are full.
        // The check is done here and not directly at the end of the loop above because
        // it can happen (for injected generic array interfaces) that the same slot is
        // processed multiple times (those interfaces have overlapping slots), and it
        // will not always be the first pass the one that fills the slot.
        if (! (class->flags & TYPE_ATTRIBUTE_ABSTRACT)) {
                for (i = 0; i < class->interface_offsets_count; i++) {
                        int ic_offset;
                        int im_index;
                        
                        ic = class->interfaces_packed [i];
                        ic_offset = mono_class_interface_offset (class, ic);
                        
                        for (im_index = 0; im_index < ic->method.count; im_index++) {
                                MonoMethod *im = ic->methods [im_index];
                                int im_slot = ic_offset + im->slot;
                                
                                if (im->flags & METHOD_ATTRIBUTE_STATIC)
                                        continue;

                                TRACE_INTERFACE_VTABLE (printf ("      [class is not abstract, checking slot %d for interface '%s'.'%s', method %s, slot check is %d]\n",
                                                im_slot, ic->name_space, ic->name, im->name, (vtable [im_slot] == NULL)));
                                if (vtable [im_slot] == NULL) {
                                        print_unimplemented_interface_method_info (class, ic, im, im_slot, overrides, onum);
                                        goto fail;
                                }
                        }
                }
        }

        TRACE_INTERFACE_VTABLE (print_vtable_full (class, vtable, cur_slot, first_non_interface_slot, "AFTER SETTING UP INTERFACE METHODS", FALSE));
        class_iter = NULL;
        for (l = virt_methods; l; l = l->next) {
                cm = l->data;
                /*
                 * If the method is REUSE_SLOT, we must check in the
                 * base class for a method to override.
                 */
                if (!(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT)) {
                        int slot = -1;
                        for (k = class->parent; k ; k = k->parent) {
                                gpointer k_iter;
                                MonoMethod *m1;

                                k_iter = NULL;
                                while ((m1 = mono_class_get_virtual_methods (k, &k_iter))) {
                                        MonoMethodSignature *cmsig, *m1sig;

                                        cmsig = mono_method_signature (cm);
                                        m1sig = mono_method_signature (m1);

                                        if (!cmsig || !m1sig) {
                                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                                return;
                                        }

                                        if (!strcmp(cm->name, m1->name) && 
                                            mono_metadata_signature_equal (cmsig, m1sig)) {

                                                /* CAS - SecurityAction.InheritanceDemand */
                                                if (security_enabled && (m1->flags & METHOD_ATTRIBUTE_HAS_SECURITY)) {
                                                        mono_secman_inheritancedemand_method (cm, m1);
                                                }

                                                if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                                                        mono_security_core_clr_check_override (class, cm, m1);

                                                slot = mono_method_get_vtable_slot (m1);
                                                if (slot == -1)
                                                        goto fail;

                                                g_assert (cm->slot < max_vtsize);
                                                if (!override_map)
                                                        override_map = g_hash_table_new (mono_aligned_addr_hash, NULL);
                                                g_hash_table_insert (override_map, m1, cm);
                                                break;
                                        }
                                }
                                if (k->exception_type)
                                        goto fail;
                                
                                if (slot >= 0) 
                                        break;
                        }
                        if (slot >= 0)
                                cm->slot = slot;
                }

                /*Non final newslot methods must be given a non-interface vtable slot*/
                if ((cm->flags & METHOD_ATTRIBUTE_NEW_SLOT) && !(cm->flags & METHOD_ATTRIBUTE_FINAL) && cm->slot >= 0)
                        cm->slot = -1;

                if (cm->slot < 0)
                        cm->slot = cur_slot++;

                if (!(cm->flags & METHOD_ATTRIBUTE_ABSTRACT))
                        vtable [cm->slot] = cm;
        }

        /* override non interface methods */
        for (i = 0; i < onum; i++) {
                MonoMethod *decl = overrides [i*2];
                if (!MONO_CLASS_IS_INTERFACE (decl->klass)) {
                        g_assert (decl->slot != -1);
                        vtable [decl->slot] = overrides [i*2 + 1];
                        overrides [i * 2 + 1]->slot = decl->slot;
                        if (!override_map)
                                override_map = g_hash_table_new (mono_aligned_addr_hash, NULL);
                        g_hash_table_insert (override_map, decl, overrides [i * 2 + 1]);

                        if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                                mono_security_core_clr_check_override (class, vtable [decl->slot], decl);
                }
        }

        /*
         * If a method occupies more than one place in the vtable, and it is
         * overriden, then change the other occurances too.
         */
        if (override_map) {
                for (i = 0; i < max_vtsize; ++i)
                        if (vtable [i]) {
                                MonoMethod *cm = g_hash_table_lookup (override_map, vtable [i]);
                                if (cm)
                                        vtable [i] = cm;
                        }

                g_hash_table_destroy (override_map);
                override_map = NULL;
        }

        g_slist_free (virt_methods);
        virt_methods = NULL;

        /* Ensure that all vtable slots are filled with concrete instance methods */
        if (!(class->flags & TYPE_ATTRIBUTE_ABSTRACT)) {
                for (i = 0; i < cur_slot; ++i) {
                        if (vtable [i] == NULL || (vtable [i]->flags & (METHOD_ATTRIBUTE_ABSTRACT | METHOD_ATTRIBUTE_STATIC))) {
                                char *type_name = mono_type_get_full_name (class);
                                char *method_name = vtable [i] ? mono_method_full_name (vtable [i], TRUE) : g_strdup ("none");
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Type %s has invalid vtable method slot %d with method %s", type_name, i, method_name));
                                g_free (type_name);
                                g_free (method_name);
                                return;
                        }
                }
        }

        if (class->generic_class) {
                MonoClass *gklass = class->generic_class->container_class;

                mono_class_init (gklass);

                class->vtable_size = MAX (gklass->vtable_size, cur_slot);
        } else {
                /* Check that the vtable_size value computed in mono_class_init () is correct */
                if (class->vtable_size)
                        g_assert (cur_slot == class->vtable_size);
                class->vtable_size = cur_slot;
        }

        /* Try to share the vtable with our parent. */
        if (class->parent && (class->parent->vtable_size == class->vtable_size) && (memcmp (class->parent->vtable, vtable, sizeof (gpointer) * class->vtable_size) == 0)) {
                mono_memory_barrier ();
                class->vtable = class->parent->vtable;
        } else {
                MonoMethod **tmp = mono_class_alloc0 (class, sizeof (gpointer) * class->vtable_size);
                memcpy (tmp, vtable,  sizeof (gpointer) * class->vtable_size);
                mono_memory_barrier ();
                class->vtable = tmp;
        }

        DEBUG_INTERFACE_VTABLE (print_vtable_full (class, class->vtable, class->vtable_size, first_non_interface_slot, "FINALLY", FALSE));
        if (mono_print_vtable) {
                int icount = 0;

                print_implemented_interfaces (class);
                
                for (i = 0; i <= max_iid; i++)
                        if (MONO_CLASS_IMPLEMENTS_INTERFACE (class, i))
                                icount++;

                printf ("VTable %s (vtable entries = %d, interfaces = %d)\n", mono_type_full_name (&class->byval_arg), 
                        class->vtable_size, icount); 

                for (i = 0; i < cur_slot; ++i) {
                        MonoMethod *cm;
               
                        cm = vtable [i];
                        if (cm) {
                                printf ("  slot assigned: %03d, slot index: %03d %s\n", i, cm->slot,
                                        mono_method_full_name (cm, TRUE));
                        }
                }


                if (icount) {
                        printf ("Interfaces %s.%s (max_iid = %d)\n", class->name_space, 
                                class->name, max_iid);
        
                        for (i = 0; i < class->interface_count; i++) {
                                ic = class->interfaces [i];
                                printf ("  slot offset: %03d, method count: %03d, iid: %03d %s\n",  
                                        mono_class_interface_offset (class, ic),
                                        count_virtual_methods (ic), ic->interface_id, mono_type_full_name (&ic->byval_arg));
                        }

                        for (k = class->parent; k ; k = k->parent) {
                                for (i = 0; i < k->interface_count; i++) {
                                        ic = k->interfaces [i]; 
                                        printf ("  parent slot offset: %03d, method count: %03d, iid: %03d %s\n",  
                                                mono_class_interface_offset (class, ic),
                                                count_virtual_methods (ic), ic->interface_id, mono_type_full_name (&ic->byval_arg));
                                }
                        }
                }
        }

        VERIFY_INTERFACE_VTABLE (mono_class_verify_vtable (class));
        return;

fail:
        {
        char *name = mono_type_get_full_name (class);
        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("VTable setup of type %s failed", name));
        g_free (name);
        if (override_map)
                g_hash_table_destroy (override_map);
        if (virt_methods)
                g_slist_free (virt_methods);
        }
}

/*
 * mono_method_get_vtable_slot:
 *
 *   Returns method->slot, computing it if neccesary. Return -1 on failure.
 * LOCKING: Acquires the loader lock.
 *
 * FIXME Use proper MonoError machinery here.
 */
int
mono_method_get_vtable_slot (MonoMethod *method)
{
        if (method->slot == -1) {
                mono_class_setup_vtable (method->klass);
                if (method->klass->exception_type)
                        return -1;
                g_assert (method->slot != -1);
        }
        return method->slot;
}

/**
 * mono_method_get_vtable_index:
 * @method: a method
 *
 * Returns the index into the runtime vtable to access the method or,
 * in the case of a virtual generic method, the virtual generic method
 * thunk. Returns -1 on failure.
 *
 * FIXME Use proper MonoError machinery here.
 */
int
mono_method_get_vtable_index (MonoMethod *method)
{
        if (method->is_inflated && (method->flags & METHOD_ATTRIBUTE_VIRTUAL)) {
                MonoMethodInflated *imethod = (MonoMethodInflated*)method;
                if (imethod->declaring->is_generic)
                        return mono_method_get_vtable_slot (imethod->declaring);
        }
        return mono_method_get_vtable_slot (method);
}

static MonoMethod *default_ghc = NULL;
static MonoMethod *default_finalize = NULL;
static int finalize_slot = -1;
static int ghc_slot = -1;

static void
initialize_object_slots (MonoClass *class)
{
        int i;
        if (default_ghc)
                return;
        if (class == mono_defaults.object_class) { 
                mono_class_setup_vtable (class);                       
                for (i = 0; i < class->vtable_size; ++i) {
                        MonoMethod *cm = class->vtable [i];
       
                        if (!strcmp (cm->name, "GetHashCode"))
                                ghc_slot = i;
                        else if (!strcmp (cm->name, "Finalize"))
                                finalize_slot = i;
                }

                g_assert (ghc_slot > 0);
                default_ghc = class->vtable [ghc_slot];

                g_assert (finalize_slot > 0);
                default_finalize = class->vtable [finalize_slot];
        }
}

typedef struct {
        MonoMethod *array_method;
        char *name;
} GenericArrayMethodInfo;

static int generic_array_method_num = 0;
static GenericArrayMethodInfo *generic_array_method_info = NULL;

static int
generic_array_methods (MonoClass *class)
{
        int i, count_generic = 0;
        GList *list = NULL, *tmp;
        if (generic_array_method_num)
                return generic_array_method_num;
        mono_class_setup_methods (class->parent); /*This is setting up System.Array*/
        g_assert (!class->parent->exception_type); /*So hitting this assert is a huge problem*/
        for (i = 0; i < class->parent->method.count; i++) {
                MonoMethod *m = class->parent->methods [i];
                if (!strncmp (m->name, "InternalArray__", 15)) {
                        count_generic++;
                        list = g_list_prepend (list, m);
                }
        }
        list = g_list_reverse (list);
        generic_array_method_info = g_malloc (sizeof (GenericArrayMethodInfo) * count_generic);
        i = 0;
        for (tmp = list; tmp; tmp = tmp->next) {
                const char *mname, *iname;
                gchar *name;
                MonoMethod *m = tmp->data;
                generic_array_method_info [i].array_method = m;
                if (!strncmp (m->name, "InternalArray__ICollection_", 27)) {
                        iname = "System.Collections.Generic.ICollection`1.";
                        mname = m->name + 27;
                } else if (!strncmp (m->name, "InternalArray__IEnumerable_", 27)) {
                        iname = "System.Collections.Generic.IEnumerable`1.";
                        mname = m->name + 27;
                } else if (!strncmp (m->name, "InternalArray__", 15)) {
                        iname = "System.Collections.Generic.IList`1.";
                        mname = m->name + 15;
                } else {
                        g_assert_not_reached ();
                }

                name = mono_image_alloc (mono_defaults.corlib, strlen (iname) + strlen (mname) + 1);
                strcpy (name, iname);
                strcpy (name + strlen (iname), mname);
                generic_array_method_info [i].name = name;
                i++;
        }
        /*g_print ("array generic methods: %d\n", count_generic);*/

        generic_array_method_num = count_generic;
        g_list_free (list);
        return generic_array_method_num;
}

static void
setup_generic_array_ifaces (MonoClass *class, MonoClass *iface, MonoMethod **methods, int pos)
{
        MonoGenericContext tmp_context;
        int i;

        tmp_context.class_inst = NULL;
        tmp_context.method_inst = iface->generic_class->context.class_inst;
        //g_print ("setting up array interface: %s\n", mono_type_get_name_full (&iface->byval_arg, 0));

        for (i = 0; i < generic_array_method_num; i++) {
                MonoMethod *m = generic_array_method_info [i].array_method;
                MonoMethod *inflated;

                inflated = mono_class_inflate_generic_method (m, &tmp_context);
                methods [pos++] = mono_marshal_get_generic_array_helper (class, iface, generic_array_method_info [i].name, inflated);
        }
}

static char*
concat_two_strings_with_zero (MonoImage *image, const char *s1, const char *s2)
{
        int len = strlen (s1) + strlen (s2) + 2;
        char *s = mono_image_alloc (image, len);
        int result;

        result = g_snprintf (s, len, "%s%c%s", s1, '\0', s2);
        g_assert (result == len - 1);

        return s;
}

static void
set_failure_from_loader_error (MonoClass *class, MonoLoaderError *error)
{
        gpointer exception_data = NULL;

        switch (error->exception_type) {
        case MONO_EXCEPTION_TYPE_LOAD:
                exception_data = concat_two_strings_with_zero (class->image, error->class_name, error->assembly_name);
                break;

        case MONO_EXCEPTION_MISSING_METHOD:
                exception_data = concat_two_strings_with_zero (class->image, error->class_name, error->member_name);
                break;

        case MONO_EXCEPTION_MISSING_FIELD: {
                const char *name_space = error->klass->name_space ? error->klass->name_space : NULL;
                const char *class_name;

                if (name_space)
                        class_name = g_strdup_printf ("%s.%s", name_space, error->klass->name);
                else
                        class_name = error->klass->name;

                exception_data = concat_two_strings_with_zero (class->image, class_name, error->member_name);
                
                if (name_space)
                        g_free ((void*)class_name);
                break;
        }

        case MONO_EXCEPTION_FILE_NOT_FOUND: {
                const char *msg;

                if (error->ref_only)
                        msg = "Cannot resolve dependency to assembly '%s' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.";
                else
                        msg = "Could not load file or assembly '%s' or one of its dependencies.";

                exception_data = concat_two_strings_with_zero (class->image, msg, error->assembly_name);
                break;
        }

        case MONO_EXCEPTION_BAD_IMAGE:
                exception_data = error->msg;
                break;

        default :
                g_assert_not_reached ();
        }

        mono_class_set_failure (class, error->exception_type, exception_data);
}

/**
 * mono_class_init:
 * @class: the class to initialize
 *
 *   Compute the instance_size, class_size and other infos that cannot be 
 * computed at mono_class_get() time. Also compute vtable_size if possible. 
 * Returns TRUE on success or FALSE if there was a problem in loading
 * the type (incorrect assemblies, missing assemblies, methods, etc). 
 *
 * LOCKING: Acquires the loader lock.
 */
gboolean
mono_class_init (MonoClass *class)
{
        int i;
        MonoCachedClassInfo cached_info;
        gboolean has_cached_info;
        
        g_assert (class);

        /* Double-checking locking pattern */
        if (class->inited)
                return class->exception_type == MONO_EXCEPTION_NONE;

        /*g_print ("Init class %s\n", class->name);*/

        /* We do everything inside the lock to prevent races */
        mono_loader_lock ();

        if (class->inited) {
                mono_loader_unlock ();
                /* Somebody might have gotten in before us */
                return class->exception_type == MONO_EXCEPTION_NONE;
        }

        if (class->init_pending) {
                mono_loader_unlock ();
                /* this indicates a cyclic dependency */
                g_error ("pending init %s.%s\n", class->name_space, class->name);
        }

        class->init_pending = 1;

        if (mono_verifier_is_enabled_for_class (class) && !mono_verifier_verify_class (class)) {
                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, concat_two_strings_with_zero (class->image, class->name, class->image->assembly_name));
                goto leave;
        }


        if (class->byval_arg.type == MONO_TYPE_ARRAY || class->byval_arg.type == MONO_TYPE_SZARRAY) {
                MonoClass *element_class = class->element_class;
                if (!element_class->inited) 
                        mono_class_init (element_class);
                if (element_class->exception_type != MONO_EXCEPTION_NONE) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        goto leave;
                }
        }

        /* CAS - SecurityAction.InheritanceDemand */
        if (mono_is_security_manager_active () && class->parent && (class->parent->flags & TYPE_ATTRIBUTE_HAS_SECURITY)) {
                mono_secman_inheritancedemand_class (class, class->parent);
        }

        mono_stats.initialized_class_count++;

        if (class->generic_class && !class->generic_class->is_dynamic) {
                MonoClass *gklass = class->generic_class->container_class;

                mono_stats.generic_class_count++;

                class->method = gklass->method;
                class->field = gklass->field;

                mono_class_init (gklass);
                // FIXME: Why is this needed ?
                if (!gklass->exception_type)
                        mono_class_setup_methods (gklass);
                if (gklass->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup_printf ("Generic Type Defintion failed to init"));
                        goto leave;
                }

                if (MONO_CLASS_IS_INTERFACE (class))
                        class->interface_id = mono_get_unique_iid (class);
        }

        if (class->parent && !class->parent->inited)
                mono_class_init (class->parent);

        has_cached_info = mono_class_get_cached_class_info (class, &cached_info);

        if (class->generic_class || class->image->dynamic || !class->type_token || (has_cached_info && !cached_info.has_nested_classes))
                class->nested_classes_inited = TRUE;

        /*
         * Computes the size used by the fields, and their locations
         */
        if (has_cached_info) {
                class->instance_size = cached_info.instance_size;
                class->sizes.class_size = cached_info.class_size;
                class->packing_size = cached_info.packing_size;
                class->min_align = cached_info.min_align;
                class->blittable = cached_info.blittable;
                class->has_references = cached_info.has_references;
                class->has_static_refs = cached_info.has_static_refs;
                class->no_special_static_fields = cached_info.no_special_static_fields;
        }
        else
                if (!class->size_inited){
                        mono_class_setup_fields (class);
                        if (class->exception_type || mono_loader_get_last_error ())
                                goto leave;
                }
                                
        /* Initialize arrays */
        if (class->rank) {
                class->method.count = 3 + (class->rank > 1? 2: 1);

                if (class->interface_count) {
                        int count_generic = generic_array_methods (class);
                        class->method.count += class->interface_count * count_generic;
                }
        }

        mono_class_setup_supertypes (class);

        if (!default_ghc)
                initialize_object_slots (class);

        /* 
         * Initialize the rest of the data without creating a generic vtable if possible.
         * If possible, also compute vtable_size, so mono_class_create_runtime_vtable () can
         * also avoid computing a generic vtable.
         */
        if (has_cached_info) {
                /* AOT case */
                class->vtable_size = cached_info.vtable_size;
                class->has_finalize = cached_info.has_finalize;
                class->ghcimpl = cached_info.ghcimpl;
                class->has_cctor = cached_info.has_cctor;
        } else if (class->rank == 1 && class->byval_arg.type == MONO_TYPE_SZARRAY) {
                static int szarray_vtable_size = 0;

                /* SZARRAY case */
                if (!szarray_vtable_size) {
                        mono_class_setup_vtable (class);
                        szarray_vtable_size = class->vtable_size;
                } else {
                        class->vtable_size = szarray_vtable_size;
                }
        } else if (class->generic_class && !MONO_CLASS_IS_INTERFACE (class)) {
                MonoClass *gklass = class->generic_class->container_class;

                /* Generic instance case */
                class->ghcimpl = gklass->ghcimpl;
                class->has_finalize = gklass->has_finalize;
                class->has_cctor = gklass->has_cctor;

                mono_class_setup_vtable (gklass);
                if (gklass->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        goto leave;
                }

                class->vtable_size = gklass->vtable_size;
        } else {
                /* General case */

                /* ghcimpl is not currently used
                class->ghcimpl = 1;
                if (class->parent) { 
                        MonoMethod *cmethod = class->vtable [ghc_slot];
                        if (cmethod->is_inflated)
                                cmethod = ((MonoMethodInflated*)cmethod)->declaring;
                        if (cmethod == default_ghc) {
                                class->ghcimpl = 0;
                        }
                }
                */

                /* Interfaces and valuetypes are not supposed to have finalizers */
                if (!(MONO_CLASS_IS_INTERFACE (class) || class->valuetype)) {
                        MonoMethod *cmethod = NULL;

                        if (class->parent && class->parent->has_finalize) {
                                class->has_finalize = 1;
                        } else {
                                if (class->type_token) {
                                        cmethod = find_method_in_metadata (class, "Finalize", 0, METHOD_ATTRIBUTE_VIRTUAL);
                                } else if (class->parent) {
                                        /* FIXME: Optimize this */
                                        mono_class_setup_vtable (class);
                                        if (class->exception_type || mono_loader_get_last_error ())
                                                goto leave;
                                        cmethod = class->vtable [finalize_slot];
                                }

                                if (cmethod) {
                                        /* Check that this is really the finalizer method */
                                        mono_class_setup_vtable (class);
                                        if (class->exception_type || mono_loader_get_last_error ())
                                                goto leave;

                                        g_assert (class->vtable_size > finalize_slot);

                                        class->has_finalize = 0;
                                        if (class->parent) { 
                                                cmethod = class->vtable [finalize_slot];
                                                g_assert (cmethod);
                                                if (cmethod->is_inflated)
                                                        cmethod = ((MonoMethodInflated*)cmethod)->declaring;
                                                if (cmethod != default_finalize) {
                                                        class->has_finalize = 1;
                                                }
                                        }
                                }
                        }
                }

                /* C# doesn't allow interfaces to have cctors */
                if (!MONO_CLASS_IS_INTERFACE (class) || class->image != mono_defaults.corlib) {
                        MonoMethod *cmethod = NULL;

                        if (class->type_token) {
                                cmethod = find_method_in_metadata (class, ".cctor", 0, METHOD_ATTRIBUTE_SPECIAL_NAME);
                                /* The find_method function ignores the 'flags' argument */
                                if (cmethod && (cmethod->flags & METHOD_ATTRIBUTE_SPECIAL_NAME))
                                        class->has_cctor = 1;
                        } else {
                                mono_class_setup_methods (class);
                                if (class->exception_type)
                                        goto leave;

                                for (i = 0; i < class->method.count; ++i) {
                                        MonoMethod *method = class->methods [i];
                                        if ((method->flags & METHOD_ATTRIBUTE_SPECIAL_NAME) && 
                                                (strcmp (".cctor", method->name) == 0)) {
                                                class->has_cctor = 1;
                                                break;
                                        }
                                }
                        }
                }
        }

        if (class->parent) {
                /* This will compute class->parent->vtable_size for some classes */
                mono_class_init (class->parent);
                if (class->parent->exception_type) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        goto leave;
                }
                if (mono_loader_get_last_error ())
                        goto leave;
                if (!class->parent->vtable_size) {
                        /* FIXME: Get rid of this somehow */
                        mono_class_setup_vtable (class->parent);
                        if (class->parent->exception_type) {
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                                goto leave;
                        }
                        if (mono_loader_get_last_error ())
                                goto leave;
                }
                setup_interface_offsets (class, class->parent->vtable_size);
        } else {
                setup_interface_offsets (class, 0);
        }

        if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                mono_security_core_clr_check_inheritance (class);

        if (mono_loader_get_last_error ()) {
                if (class->exception_type == MONO_EXCEPTION_NONE) {
                        set_failure_from_loader_error (class, mono_loader_get_last_error ());
                }
                mono_loader_clear_error ();
        }

        goto leave;

 leave:
        /* Because of the double-checking locking pattern */
        mono_memory_barrier ();
        class->inited = 1;
        class->init_pending = 0;

        mono_loader_unlock ();

        if (mono_debugger_class_init_func)
                mono_debugger_class_init_func (class);

        return class->exception_type == MONO_EXCEPTION_NONE;
}

static gboolean
is_corlib_image (MonoImage *image)
{
        /* FIXME: allow the dynamic case for our compilers and with full trust */
        if (image->dynamic)
                return image->assembly && !strcmp (image->assembly->aname.name, "mscorlib");
        else
                return image == mono_defaults.corlib;
}

/*
 * LOCKING: this assumes the loader lock is held
 */
void
mono_class_setup_mono_type (MonoClass *class)
{
        const char *name = class->name;
        const char *nspace = class->name_space;
        gboolean is_corlib = is_corlib_image (class->image);

        class->this_arg.byref = 1;
        class->this_arg.data.klass = class;
        class->this_arg.type = MONO_TYPE_CLASS;
        class->byval_arg.data.klass = class;
        class->byval_arg.type = MONO_TYPE_CLASS;

        if (is_corlib && !strcmp (nspace, "System")) {
                if (!strcmp (name, "ValueType")) {
                        /*
                         * do not set the valuetype bit for System.ValueType.
                         * class->valuetype = 1;
                         */
                        class->blittable = TRUE;
                } else if (!strcmp (name, "Enum")) {
                        /*
                         * do not set the valuetype bit for System.Enum.
                         * class->valuetype = 1;
                         */
                        class->valuetype = 0;
                        class->enumtype = 0;
                } else if (!strcmp (name, "Object")) {
                        class->this_arg.type = class->byval_arg.type = MONO_TYPE_OBJECT;
                } else if (!strcmp (name, "String")) {
                        class->this_arg.type = class->byval_arg.type = MONO_TYPE_STRING;
                } else if (!strcmp (name, "TypedReference")) {
                        class->this_arg.type = class->byval_arg.type = MONO_TYPE_TYPEDBYREF;
                }
        }

        if (class->valuetype) {
                int t = MONO_TYPE_VALUETYPE;

                if (is_corlib && !strcmp (nspace, "System")) {
                        switch (*name) {
                        case 'B':
                                if (!strcmp (name, "Boolean")) {
                                        t = MONO_TYPE_BOOLEAN;
                                } else if (!strcmp(name, "Byte")) {
                                        t = MONO_TYPE_U1;
                                        class->blittable = TRUE;                                                
                                }
                                break;
                        case 'C':
                                if (!strcmp (name, "Char")) {
                                        t = MONO_TYPE_CHAR;
                                }
                                break;
                        case 'D':
                                if (!strcmp (name, "Double")) {
                                        t = MONO_TYPE_R8;
                                        class->blittable = TRUE;                                                
                                }
                                break;
                        case 'I':
                                if (!strcmp (name, "Int32")) {
                                        t = MONO_TYPE_I4;
                                        class->blittable = TRUE;
                                } else if (!strcmp(name, "Int16")) {
                                        t = MONO_TYPE_I2;
                                        class->blittable = TRUE;
                                } else if (!strcmp(name, "Int64")) {
                                        t = MONO_TYPE_I8;
                                        class->blittable = TRUE;
                                } else if (!strcmp(name, "IntPtr")) {
                                        t = MONO_TYPE_I;
                                        class->blittable = TRUE;
                                }
                                break;
                        case 'S':
                                if (!strcmp (name, "Single")) {
                                        t = MONO_TYPE_R4;
                                        class->blittable = TRUE;                                                
                                } else if (!strcmp(name, "SByte")) {
                                        t = MONO_TYPE_I1;
                                        class->blittable = TRUE;
                                }
                                break;
                        case 'U':
                                if (!strcmp (name, "UInt32")) {
                                        t = MONO_TYPE_U4;
                                        class->blittable = TRUE;
                                } else if (!strcmp(name, "UInt16")) {
                                        t = MONO_TYPE_U2;
                                        class->blittable = TRUE;
                                } else if (!strcmp(name, "UInt64")) {
                                        t = MONO_TYPE_U8;
                                        class->blittable = TRUE;
                                } else if (!strcmp(name, "UIntPtr")) {
                                        t = MONO_TYPE_U;
                                        class->blittable = TRUE;
                                }
                                break;
                        case 'T':
                                if (!strcmp (name, "TypedReference")) {
                                        t = MONO_TYPE_TYPEDBYREF;
                                        class->blittable = TRUE;
                                }
                                break;
                        case 'V':
                                if (!strcmp (name, "Void")) {
                                        t = MONO_TYPE_VOID;
                                }
                                break;
                        default:
                                break;
                        }
                }
                class->this_arg.type = class->byval_arg.type = t;
        }

        if (MONO_CLASS_IS_INTERFACE (class))
                class->interface_id = mono_get_unique_iid (class);

}

/*
 * COM initialization (using mono_init_com_types) is delayed until needed. 
 * However when a [ComImport] attribute is present on a type it will trigger
 * the initialization. This is not a problem unless the BCL being executed 
 * lacks the types that COM depends on (e.g. Variant on Silverlight).
 */
static void
init_com_from_comimport (MonoClass *class)
{
        /* we don't always allow COM initialization under the CoreCLR (e.g. Moonlight does not require it) */
        if ((mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)) {
                /* but some other CoreCLR user could requires it for their platform (i.e. trusted) code */
                if (!mono_security_core_clr_determine_platform_image (class->image)) {
                        /* but it can not be made available for application (i.e. user code) since all COM calls
                         * are considered native calls. In this case we fail with a TypeLoadException (just like
                         * Silverlight 2 does */
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        return;
                }
        }
        /* FIXME : we should add an extra checks to ensure COM can be initialized properly before continuing */
        mono_init_com_types ();
}

/*
 * LOCKING: this assumes the loader lock is held
 */
void
mono_class_setup_parent (MonoClass *class, MonoClass *parent)
{
        gboolean system_namespace;
        gboolean is_corlib = is_corlib_image (class->image);

        system_namespace = !strcmp (class->name_space, "System") && is_corlib;

        /* if root of the hierarchy */
        if (system_namespace && !strcmp (class->name, "Object")) {
                class->parent = NULL;
                class->instance_size = sizeof (MonoObject);
                return;
        }
        if (!strcmp (class->name, "<Module>")) {
                class->parent = NULL;
                class->instance_size = 0;
                return;
        }

        if (!MONO_CLASS_IS_INTERFACE (class)) {
                /* Imported COM Objects always derive from __ComObject. */
                if (MONO_CLASS_IS_IMPORT (class)) {
                        init_com_from_comimport (class);
                        if (parent == mono_defaults.object_class)
                                parent = mono_defaults.com_object_class;
                }
                if (!parent) {
                        /* set the parent to something useful and safe, but mark the type as broken */
                        parent = mono_defaults.object_class;
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                }

                class->parent = parent;

                if (parent->generic_class && !parent->name) {
                        /*
                         * If the parent is a generic instance, we may get
                         * called before it is fully initialized, especially
                         * before it has its name.
                         */
                        return;
                }

                class->marshalbyref = parent->marshalbyref;
                class->contextbound  = parent->contextbound;
                class->delegate  = parent->delegate;
                if (MONO_CLASS_IS_IMPORT (class))
                        class->is_com_object = 1;
                else
                        class->is_com_object = parent->is_com_object;
                
                if (system_namespace) {
                        if (*class->name == 'M' && !strcmp (class->name, "MarshalByRefObject"))
                                class->marshalbyref = 1;

                        if (*class->name == 'C' && !strcmp (class->name, "ContextBoundObject")) 
                                class->contextbound  = 1;

                        if (*class->name == 'D' && !strcmp (class->name, "Delegate")) 
                                class->delegate  = 1;
                }

                if (class->parent->enumtype || (is_corlib_image (class->parent->image) && (strcmp (class->parent->name, "ValueType") == 0) && 
                                                (strcmp (class->parent->name_space, "System") == 0)))
                        class->valuetype = 1;
                if (is_corlib_image (class->parent->image) && ((strcmp (class->parent->name, "Enum") == 0) && (strcmp (class->parent->name_space, "System") == 0))) {
                        class->valuetype = class->enumtype = 1;
                }
                /*class->enumtype = class->parent->enumtype; */
                mono_class_setup_supertypes (class);
        } else {
                /* initialize com types if COM interfaces are present */
                if (MONO_CLASS_IS_IMPORT (class))
                        init_com_from_comimport (class);
                class->parent = NULL;
        }

}

/*
 * mono_class_setup_supertypes:
 * @class: a class
 *
 * Build the data structure needed to make fast type checks work.
 * This currently sets two fields in @class:
 *  - idepth: distance between @class and System.Object in the type
 *    hierarchy + 1
 *  - supertypes: array of classes: each element has a class in the hierarchy
 *    starting from @class up to System.Object
 * 
 * LOCKING: this assumes the loader lock is held
 */
void
mono_class_setup_supertypes (MonoClass *class)
{
        int ms;

        if (class->supertypes)
                return;

        if (class->parent && !class->parent->supertypes)
                mono_class_setup_supertypes (class->parent);
        if (class->parent)
                class->idepth = class->parent->idepth + 1;
        else
                class->idepth = 1;

        ms = MAX (MONO_DEFAULT_SUPERTABLE_SIZE, class->idepth);
        class->supertypes = mono_class_alloc0 (class, sizeof (MonoClass *) * ms);

        if (class->parent) {
                class->supertypes [class->idepth - 1] = class;
                memcpy (class->supertypes, class->parent->supertypes, class->parent->idepth * sizeof (gpointer));
        } else {
                class->supertypes [0] = class;
        }
}

/**
 * mono_class_create_from_typedef:
 * @image: image where the token is valid
 * @type_token:  typedef token
 *
 * Create the MonoClass* representing the specified type token.
 * @type_token must be a TypeDef token.
 *
 * FIXME: don't return NULL on failure, just the the caller figure it out.
 */
static MonoClass *
mono_class_create_from_typedef (MonoImage *image, guint32 type_token)
{
        MonoTableInfo *tt = &image->tables [MONO_TABLE_TYPEDEF];
        MonoClass *class, *parent = NULL;
        guint32 cols [MONO_TYPEDEF_SIZE];
        guint32 cols_next [MONO_TYPEDEF_SIZE];
        guint tidx = mono_metadata_token_index (type_token);
        MonoGenericContext *context = NULL;
        const char *name, *nspace;
        guint icount = 0; 
        MonoClass **interfaces;
        guint32 field_last, method_last;
        guint32 nesting_tokeen;

        if (mono_metadata_token_table (type_token) != MONO_TABLE_TYPEDEF || tidx > tt->rows)
                return NULL;

        mono_loader_lock ();

        if ((class = mono_internal_hash_table_lookup (&image->class_cache, GUINT_TO_POINTER (type_token)))) {
                mono_loader_unlock ();
                return class->exception_type ? NULL : class;
        }

        mono_metadata_decode_row (tt, tidx - 1, cols, MONO_TYPEDEF_SIZE);
        
        name = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
        nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);

        class = mono_image_alloc0 (image, sizeof (MonoClass));

        class->name = name;
        class->name_space = nspace;

        mono_profiler_class_event (class, MONO_PROFILE_START_LOAD);

        class->image = image;
        class->type_token = type_token;
        class->flags = cols [MONO_TYPEDEF_FLAGS];

        mono_internal_hash_table_insert (&image->class_cache, GUINT_TO_POINTER (type_token), class);

        classes_size += sizeof (MonoClass);

        /*
         * Check whether we're a generic type definition.
         */
        class->generic_container = mono_metadata_load_generic_params (image, class->type_token, NULL);
        if (class->generic_container) {
                class->is_generic = 1;
                class->generic_container->owner.klass = class;
                context = &class->generic_container->context;
        }

        if (cols [MONO_TYPEDEF_EXTENDS]) {
                MonoClass *tmp;
                guint32 parent_token = mono_metadata_token_from_dor (cols [MONO_TYPEDEF_EXTENDS]);

                if (mono_metadata_token_table (parent_token) == MONO_TABLE_TYPESPEC) {
                        /*WARNING: this must satisfy mono_metadata_type_hash*/
                        class->this_arg.byref = 1;
                        class->this_arg.data.klass = class;
                        class->this_arg.type = MONO_TYPE_CLASS;
                        class->byval_arg.data.klass = class;
                        class->byval_arg.type = MONO_TYPE_CLASS;
                }
                parent = mono_class_get_full (image, parent_token, context);

                if (parent == NULL){
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Could not load parent type"));
                        mono_loader_unlock ();
                        mono_profiler_class_loaded (class, MONO_PROFILE_FAILED);
                        return NULL;
                }

                for (tmp = parent; tmp; tmp = tmp->parent) {
                        if (tmp == class) {
                                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Cycle found while resolving parent"));
                                mono_loader_unlock ();
                                mono_profiler_class_loaded (class, MONO_PROFILE_FAILED);
                                return NULL;
                        }
                }
        }

        mono_class_setup_parent (class, parent);

        /* uses ->valuetype, which is initialized by mono_class_setup_parent above */
        mono_class_setup_mono_type (class);

        /* 
         * This might access class->byval_arg for recursion generated by generic constraints,
         * so it has to come after setup_mono_type ().
         */
        if ((nesting_tokeen = mono_metadata_nested_in_typedef (image, type_token))) {
                class->nested_in = mono_class_create_from_typedef (image, nesting_tokeen);
                if (!class->nested_in) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Could not load nestedin type"));
                        mono_loader_unlock ();
                        mono_profiler_class_loaded (class, MONO_PROFILE_FAILED);
                        return NULL;
                }
        }

        if ((class->flags & TYPE_ATTRIBUTE_STRING_FORMAT_MASK) == TYPE_ATTRIBUTE_UNICODE_CLASS)
                class->unicode = 1;

#ifdef HOST_WIN32
        if ((class->flags & TYPE_ATTRIBUTE_STRING_FORMAT_MASK) == TYPE_ATTRIBUTE_AUTO_CLASS)
                class->unicode = 1;
#endif

        class->cast_class = class->element_class = class;

        if (!class->enumtype) {
                if (!mono_metadata_interfaces_from_typedef_full (
                            image, type_token, &interfaces, &icount, FALSE, context)){
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Could not load interfaces"));
                        mono_loader_unlock ();
                        mono_profiler_class_loaded (class, MONO_PROFILE_FAILED);
                        return NULL;
                }

                class->interfaces = interfaces;
                class->interface_count = icount;
                class->interfaces_inited = 1;
        }

        /*g_print ("Load class %s\n", name);*/

        /*
         * Compute the field and method lists
         */
        class->field.first  = cols [MONO_TYPEDEF_FIELD_LIST] - 1;
        class->method.first = cols [MONO_TYPEDEF_METHOD_LIST] - 1;

        if (tt->rows > tidx){           
                mono_metadata_decode_row (tt, tidx, cols_next, MONO_TYPEDEF_SIZE);
                field_last  = cols_next [MONO_TYPEDEF_FIELD_LIST] - 1;
                method_last = cols_next [MONO_TYPEDEF_METHOD_LIST] - 1;
        } else {
                field_last  = image->tables [MONO_TABLE_FIELD].rows;
                method_last = image->tables [MONO_TABLE_METHOD].rows;
        }

        if (cols [MONO_TYPEDEF_FIELD_LIST] && 
            cols [MONO_TYPEDEF_FIELD_LIST] <= image->tables [MONO_TABLE_FIELD].rows)
                class->field.count = field_last - class->field.first;
        else
                class->field.count = 0;

        if (cols [MONO_TYPEDEF_METHOD_LIST] <= image->tables [MONO_TABLE_METHOD].rows)
                class->method.count = method_last - class->method.first;
        else
                class->method.count = 0;

        /* reserve space to store vector pointer in arrays */
        if (is_corlib_image (image) && !strcmp (nspace, "System") && !strcmp (name, "Array")) {
                class->instance_size += 2 * sizeof (gpointer);
                g_assert (class->field.count == 0);
        }

        if (class->enumtype) {
                MonoType *enum_basetype = mono_class_find_enum_basetype (class);
                if (!enum_basetype) {
                        mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);
                        mono_loader_unlock ();
                        mono_profiler_class_loaded (class, MONO_PROFILE_FAILED);
                        return NULL;
                }
                class->cast_class = class->element_class = mono_class_from_mono_type (enum_basetype);
        }

        /*
         * If we're a generic type definition, load the constraints.
         * We must do this after the class has been constructed to make certain recursive scenarios
         * work.
         */
        if (class->generic_container && !mono_metadata_load_generic_param_constraints_full (image, type_token, class->generic_container)){
                char *class_name = g_strdup_printf("%s.%s", class->name_space, class->name);
                char *error = concat_two_strings_with_zero (class->image, class_name, class->image->assembly_name);
                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, error);
                g_free (class_name);
                mono_loader_unlock ();
                mono_profiler_class_loaded (class, MONO_PROFILE_FAILED);
                return NULL;
        }

        if (class->image->assembly_name && !strcmp (class->image->assembly_name, "Mono.Simd") && !strcmp (nspace, "Mono.Simd")) {
                if (!strncmp (name, "Vector", 6))
                        class->simd_type = !strcmp (name + 6, "2d") || !strcmp (name + 6, "2ul") || !strcmp (name + 6, "2l") || !strcmp (name + 6, "4f") || !strcmp (name + 6, "4ui") || !strcmp (name + 6, "4i") || !strcmp (name + 6, "8s") || !strcmp (name + 6, "8us") || !strcmp (name + 6, "16b") || !strcmp (name + 6, "16sb");
        }

        mono_loader_unlock ();

        mono_profiler_class_loaded (class, MONO_PROFILE_OK);

        return class;
}

/** is klass Nullable<T>? */
gboolean
mono_class_is_nullable (MonoClass *klass)
{
       return klass->generic_class != NULL &&
               klass->generic_class->container_class == mono_defaults.generic_nullable_class;
}


/** if klass is T? return T */
MonoClass*
mono_class_get_nullable_param (MonoClass *klass)
{
       g_assert (mono_class_is_nullable (klass));
       return mono_class_from_mono_type (klass->generic_class->context.class_inst->type_argv [0]);
}

/*
 * Create the `MonoClass' for an instantiation of a generic type.
 * We only do this if we actually need it.
 */
MonoClass*
mono_generic_class_get_class (MonoGenericClass *gclass)
{
        MonoClass *klass, *gklass;

        mono_loader_lock ();
        if (gclass->cached_class) {
                mono_loader_unlock ();
                return gclass->cached_class;
        }

        gclass->cached_class = g_malloc0 (sizeof (MonoClass));
        klass = gclass->cached_class;

        gklass = gclass->container_class;

        if (gklass->nested_in) {
                /* 
                 * FIXME: the nested type context should include everything the
                 * nesting context should have, but it may also have additional
                 * generic parameters...
                 */
                klass->nested_in = mono_class_inflate_generic_class (gklass->nested_in,
                                                                                                                         mono_generic_class_get_context (gclass));
        }

        klass->name = gklass->name;
        klass->name_space = gklass->name_space;
        
        mono_profiler_class_event (klass, MONO_PROFILE_START_LOAD);
        
        klass->image = gklass->image;
        klass->flags = gklass->flags;
        klass->type_token = gklass->type_token;
        klass->field.count = gklass->field.count;

        klass->is_inflated = 1;
        klass->generic_class = gclass;

        klass->this_arg.type = klass->byval_arg.type = MONO_TYPE_GENERICINST;
        klass->this_arg.data.generic_class = klass->byval_arg.data.generic_class = gclass;
        klass->this_arg.byref = TRUE;
        klass->enumtype = gklass->enumtype;
        klass->valuetype = gklass->valuetype;

        klass->cast_class = klass->element_class = klass;

        if (mono_class_is_nullable (klass))
                klass->cast_class = klass->element_class = mono_class_get_nullable_param (klass);

        /*
         * We're not interested in the nested classes of a generic instance.
         * We use the generic type definition to look for nested classes.
         */

        if (gklass->parent) {
                klass->parent = mono_class_inflate_generic_class (gklass->parent, mono_generic_class_get_context (gclass));
        }

        if (klass->parent)
                mono_class_setup_parent (klass, klass->parent);

        if (klass->enumtype) {
                klass->cast_class = gklass->cast_class;
                klass->element_class = gklass->element_class;
        }

        if (gclass->is_dynamic) {
                klass->inited = 1;

                mono_class_setup_supertypes (klass);

                if (klass->enumtype) {
                        /*
                         * For enums, gklass->fields might not been set, but instance_size etc. is 
                         * already set in mono_reflection_create_internal_class (). For non-enums,
                         * these will be computed normally in mono_class_layout_fields ().
                         */
                        klass->instance_size = gklass->instance_size;
                        klass->sizes.class_size = gklass->sizes.class_size;
                        klass->size_inited = 1;
                }
        }

        mono_profiler_class_loaded (klass, MONO_PROFILE_OK);

        inflated_classes ++;
        inflated_classes_size += sizeof (MonoClass);
        
        mono_loader_unlock ();

        return klass;
}

static MonoClass*
make_generic_param_class (MonoGenericParam *param, MonoImage *image, gboolean is_mvar, MonoGenericParamInfo *pinfo)
{
        MonoClass *klass, **ptr;
        int count, pos, i;
        MonoGenericContainer *container = mono_generic_param_owner (param);

        if (!image)
                /* FIXME: */
                image = mono_defaults.corlib;

        klass = mono_image_alloc0 (image, sizeof (MonoClass));
        classes_size += sizeof (MonoClass);

        if (pinfo) {
                klass->name = pinfo->name;
        } else {
                int n = mono_generic_param_num (param);
                klass->name = mono_image_alloc0 (image, 16);
                sprintf ((char*)klass->name, "%d", n);
        }

        if (container) {
                if (is_mvar) {
                        MonoMethod *omethod = container->owner.method;
                        klass->name_space = (omethod && omethod->klass) ? omethod->klass->name_space : "";
                } else {
                        MonoClass *oklass = container->owner.klass;
                        klass->name_space = oklass ? oklass->name_space : "";
                }
        } else {
                klass->name_space = "";
        }

        mono_profiler_class_event (klass, MONO_PROFILE_START_LOAD);

        count = 0;
        if (pinfo)
                for (ptr = pinfo->constraints; ptr && *ptr; ptr++, count++)
                        ;

        pos = 0;
        if ((count > 0) && !MONO_CLASS_IS_INTERFACE (pinfo->constraints [0])) {
                klass->parent = pinfo->constraints [0];
                pos++;
        } else if (pinfo && pinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT)
                klass->parent = mono_class_from_name (mono_defaults.corlib, "System", "ValueType");
        else
                klass->parent = mono_defaults.object_class;


        if (count - pos > 0) {
                klass->interface_count = count - pos;
                klass->interfaces = mono_image_alloc0 (image, sizeof (MonoClass *) * (count - pos));
                klass->interfaces_inited = TRUE;
                for (i = pos; i < count; i++)
                        klass->interfaces [i - pos] = pinfo->constraints [i];
        }

        klass->image = image;

        klass->inited = TRUE;
        klass->cast_class = klass->element_class = klass;
        klass->flags = TYPE_ATTRIBUTE_PUBLIC;

        klass->this_arg.type = klass->byval_arg.type = is_mvar ? MONO_TYPE_MVAR : MONO_TYPE_VAR;
        klass->this_arg.data.generic_param = klass->byval_arg.data.generic_param = param;
        klass->this_arg.byref = TRUE;

        /* We don't use type_token for VAR since only classes can use it (not arrays, pointer, VARs, etc) */
        klass->sizes.generic_param_token = pinfo ? pinfo->token : 0;

        /*Init these fields to sane values*/
        klass->min_align = 1;
        klass->instance_size = sizeof (gpointer);
        klass->size_inited = 1;

        mono_class_setup_supertypes (klass);

        if (count - pos > 0) {
                mono_class_setup_vtable (klass->parent);
                g_assert (!klass->parent->exception_type);
                setup_interface_offsets (klass, klass->parent->vtable_size);
        }

        return klass;
}

#define FAST_CACHE_SIZE 16
static MonoClass *var_cache_fast [FAST_CACHE_SIZE];
static MonoClass *mvar_cache_fast [FAST_CACHE_SIZE];
static GHashTable *var_cache_slow;
static GHashTable *mvar_cache_slow;

static MonoClass *
get_anon_gparam_class (MonoGenericParam *param, gboolean is_mvar)
{
        int n = mono_generic_param_num (param);
        GHashTable *ht;

        if (n < FAST_CACHE_SIZE)
                return (is_mvar ? mvar_cache_fast : var_cache_fast) [n];
        ht = is_mvar ? mvar_cache_slow : var_cache_slow;
        return ht ? g_hash_table_lookup (ht, GINT_TO_POINTER (n)) : NULL;
}

static void
set_anon_gparam_class (MonoGenericParam *param, gboolean is_mvar, MonoClass *klass)
{
        int n = mono_generic_param_num (param);
        GHashTable *ht;

        if (n < FAST_CACHE_SIZE) {
                (is_mvar ? mvar_cache_fast : var_cache_fast) [n] = klass;
                return;
        }
        ht = is_mvar ? mvar_cache_slow : var_cache_slow;
        if (!ht) {
                ht = g_hash_table_new (NULL, NULL);
                if (is_mvar)
                        mvar_cache_slow = ht;
                else
                        var_cache_slow = ht;
        }

        g_hash_table_insert (ht, GINT_TO_POINTER (n), klass);
}

/*
 * LOCKING: Acquires the loader lock.
 */
MonoClass *
mono_class_from_generic_parameter (MonoGenericParam *param, MonoImage *image, gboolean is_mvar)
{
        MonoGenericContainer *container = mono_generic_param_owner (param);
        MonoGenericParamInfo *pinfo;
        MonoClass *klass;

        mono_loader_lock ();

        if (container) {
                pinfo = mono_generic_param_info (param);
                if (pinfo->pklass) {
                        mono_loader_unlock ();
                        return pinfo->pklass;
                }
        } else {
                pinfo = NULL;
                image = NULL;

                klass = get_anon_gparam_class (param, is_mvar);
                if (klass) {
                        mono_loader_unlock ();
                        return klass;
                }
        }

        if (!image && container) {
                if (is_mvar) {
                        MonoMethod *method = container->owner.method;
                        image = (method && method->klass) ? method->klass->image : NULL;
                } else {
                        MonoClass *klass = container->owner.klass;
                        // FIXME: 'klass' should not be null
                        //        But, monodis creates GenericContainers without associating a owner to it
                        image = klass ? klass->image : NULL;
                }
        }

        klass = make_generic_param_class (param, image, is_mvar, pinfo);

        mono_memory_barrier ();

        if (container)
                pinfo->pklass = klass;
        else
                set_anon_gparam_class (param, is_mvar, klass);

        mono_loader_unlock ();

        /* FIXME: Should this go inside 'make_generic_param_klass'? */
        mono_profiler_class_loaded (klass, MONO_PROFILE_OK);

        return klass;
}

MonoClass *
mono_ptr_class_get (MonoType *type)
{
        MonoClass *result;
        MonoClass *el_class;
        MonoImage *image;
        char *name;

        el_class = mono_class_from_mono_type (type);
        image = el_class->image;

        mono_loader_lock ();

        if (!image->ptr_cache)
                image->ptr_cache = g_hash_table_new (mono_aligned_addr_hash, NULL);

        if ((result = g_hash_table_lookup (image->ptr_cache, el_class))) {
                mono_loader_unlock ();
                return result;
        }
        result = mono_image_alloc0 (image, sizeof (MonoClass));

        classes_size += sizeof (MonoClass);

        result->parent = NULL; /* no parent for PTR types */
        result->name_space = el_class->name_space;
        name = g_strdup_printf ("%s*", el_class->name);
        result->name = mono_image_strdup (image, name);
        g_free (name);

        mono_profiler_class_event (result, MONO_PROFILE_START_LOAD);

        result->image = el_class->image;
        result->inited = TRUE;
        result->flags = TYPE_ATTRIBUTE_CLASS | (el_class->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK);
        /* Can pointers get boxed? */
        result->instance_size = sizeof (gpointer);
        result->cast_class = result->element_class = el_class;
        result->blittable = TRUE;

        result->this_arg.type = result->byval_arg.type = MONO_TYPE_PTR;
        result->this_arg.data.type = result->byval_arg.data.type = &result->element_class->byval_arg;
        result->this_arg.byref = TRUE;

        mono_class_setup_supertypes (result);

        g_hash_table_insert (image->ptr_cache, el_class, result);

        mono_loader_unlock ();

        mono_profiler_class_loaded (result, MONO_PROFILE_OK);

        return result;
}

static MonoClass *
mono_fnptr_class_get (MonoMethodSignature *sig)
{
        MonoClass *result;
        static GHashTable *ptr_hash = NULL;

        /* FIXME: These should be allocate from a mempool as well, but which one ? */

        mono_loader_lock ();

        if (!ptr_hash)
                ptr_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
        
        if ((result = g_hash_table_lookup (ptr_hash, sig))) {
                mono_loader_unlock ();
                return result;
        }
        result = g_new0 (MonoClass, 1);

        result->parent = NULL; /* no parent for PTR types */
        result->name_space = "System";
        result->name = "MonoFNPtrFakeClass";

        mono_profiler_class_event (result, MONO_PROFILE_START_LOAD);

        result->image = mono_defaults.corlib; /* need to fix... */
        result->inited = TRUE;
        result->flags = TYPE_ATTRIBUTE_CLASS; /* | (el_class->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK); */
        /* Can pointers get boxed? */
        result->instance_size = sizeof (gpointer);
        result->cast_class = result->element_class = result;
        result->blittable = TRUE;

        result->this_arg.type = result->byval_arg.type = MONO_TYPE_FNPTR;
        result->this_arg.data.method = result->byval_arg.data.method = sig;
        result->this_arg.byref = TRUE;
        result->blittable = TRUE;

        mono_class_setup_supertypes (result);

        g_hash_table_insert (ptr_hash, sig, result);

        mono_loader_unlock ();

        mono_profiler_class_loaded (result, MONO_PROFILE_OK);

        return result;
}

MonoClass *
mono_class_from_mono_type (MonoType *type)
{
        switch (type->type) {
        case MONO_TYPE_OBJECT:
                return type->data.klass? type->data.klass: mono_defaults.object_class;
        case MONO_TYPE_VOID:
                return type->data.klass? type->data.klass: mono_defaults.void_class;
        case MONO_TYPE_BOOLEAN:
                return type->data.klass? type->data.klass: mono_defaults.boolean_class;
        case MONO_TYPE_CHAR:
                return type->data.klass? type->data.klass: mono_defaults.char_class;
        case MONO_TYPE_I1:
                return type->data.klass? type->data.klass: mono_defaults.sbyte_class;
        case MONO_TYPE_U1:
                return type->data.klass? type->data.klass: mono_defaults.byte_class;
        case MONO_TYPE_I2:
                return type->data.klass? type->data.klass: mono_defaults.int16_class;
        case MONO_TYPE_U2:
                return type->data.klass? type->data.klass: mono_defaults.uint16_class;
        case MONO_TYPE_I4:
                return type->data.klass? type->data.klass: mono_defaults.int32_class;
        case MONO_TYPE_U4:
                return type->data.klass? type->data.klass: mono_defaults.uint32_class;
        case MONO_TYPE_I:
                return type->data.klass? type->data.klass: mono_defaults.int_class;
        case MONO_TYPE_U:
                return type->data.klass? type->data.klass: mono_defaults.uint_class;
        case MONO_TYPE_I8:
                return type->data.klass? type->data.klass: mono_defaults.int64_class;
        case MONO_TYPE_U8:
                return type->data.klass? type->data.klass: mono_defaults.uint64_class;
        case MONO_TYPE_R4:
                return type->data.klass? type->data.klass: mono_defaults.single_class;
        case MONO_TYPE_R8:
                return type->data.klass? type->data.klass: mono_defaults.double_class;
        case MONO_TYPE_STRING:
                return type->data.klass? type->data.klass: mono_defaults.string_class;
        case MONO_TYPE_TYPEDBYREF:
                return type->data.klass? type->data.klass: mono_defaults.typed_reference_class;
        case MONO_TYPE_ARRAY:
                return mono_bounded_array_class_get (type->data.array->eklass, type->data.array->rank, TRUE);
        case MONO_TYPE_PTR:
                return mono_ptr_class_get (type->data.type);
        case MONO_TYPE_FNPTR:
                return mono_fnptr_class_get (type->data.method);
        case MONO_TYPE_SZARRAY:
                return mono_array_class_get (type->data.klass, 1);
        case MONO_TYPE_CLASS:
        case MONO_TYPE_VALUETYPE:
                return type->data.klass;
        case MONO_TYPE_GENERICINST:
                return mono_generic_class_get_class (type->data.generic_class);
        case MONO_TYPE_VAR:
                return mono_class_from_generic_parameter (type->data.generic_param, NULL, FALSE);
        case MONO_TYPE_MVAR:
                return mono_class_from_generic_parameter (type->data.generic_param, NULL, TRUE);
        default:
                g_warning ("mono_class_from_mono_type: implement me 0x%02x\n", type->type);
                g_assert_not_reached ();
        }
        
        return NULL;
}

/**
 * mono_type_retrieve_from_typespec
 * @image: context where the image is created
 * @type_spec:  typespec token
 * @context: the generic context used to evaluate generic instantiations in
 */
static MonoType *
mono_type_retrieve_from_typespec (MonoImage *image, guint32 type_spec, MonoGenericContext *context, gboolean *did_inflate, MonoError *error)
{
        MonoType *t = mono_type_create_from_typespec (image, type_spec);

        mono_error_init (error);
        *did_inflate = FALSE;

        if (!t) {
                char *name = mono_class_name_from_token (image, type_spec);
                char *assembly = mono_assembly_name_from_token (image, type_spec);
                mono_error_set_type_load_name (error, name, assembly, "Could not resolve typespec token %08x", type_spec);
                return NULL;
        }

        if (context && (context->class_inst || context->method_inst)) {
                MonoType *inflated = inflate_generic_type (NULL, t, context, error);

                if (!mono_error_ok (error))
                        return NULL;

                if (inflated) {
                        t = inflated;
                        *did_inflate = TRUE;
                }
        }
        return t;
}

/**
 * mono_class_create_from_typespec
 * @image: context where the image is created
 * @type_spec:  typespec token
 * @context: the generic context used to evaluate generic instantiations in
 */
static MonoClass *
mono_class_create_from_typespec (MonoImage *image, guint32 type_spec, MonoGenericContext *context, MonoError *error)
{
        MonoClass *ret;
        gboolean inflated = FALSE;
        MonoType *t = mono_type_retrieve_from_typespec (image, type_spec, context, &inflated, error);
        if (!mono_error_ok (error))
                return NULL;
        ret = mono_class_from_mono_type (t);
        if (inflated)
                mono_metadata_free_type (t);
        return ret;
}

/**
 * mono_bounded_array_class_get:
 * @element_class: element class 
 * @rank: the dimension of the array class
 * @bounded: whenever the array has non-zero bounds
 *
 * Returns: a class object describing the array with element type @element_type and 
 * dimension @rank. 
 */
MonoClass *
mono_bounded_array_class_get (MonoClass *eclass, guint32 rank, gboolean bounded)
{
        MonoImage *image;
        MonoClass *class;
        MonoClass *parent = NULL;
        GSList *list, *rootlist = NULL;
        int nsize;
        char *name;
        gboolean corlib_type = FALSE;

        g_assert (rank <= 255);

        if (rank > 1)
                /* bounded only matters for one-dimensional arrays */
                bounded = FALSE;

        image = eclass->image;

        if (rank == 1 && !bounded) {
                /* 
                 * This case is very frequent not just during compilation because of calls 
                 * from mono_class_from_mono_type (), mono_array_new (), 
                 * Array:CreateInstance (), etc, so use a separate cache + a separate lock.
                 */
                EnterCriticalSection (&image->szarray_cache_lock);
                if (!image->szarray_cache)
                        image->szarray_cache = g_hash_table_new (mono_aligned_addr_hash, NULL);
                class = g_hash_table_lookup (image->szarray_cache, eclass);
                LeaveCriticalSection (&image->szarray_cache_lock);
                if (class)
                        return class;

                mono_loader_lock ();
        } else {
                mono_loader_lock ();

                if (!image->array_cache)
                        image->array_cache = g_hash_table_new (mono_aligned_addr_hash, NULL);

                if ((rootlist = list = g_hash_table_lookup (image->array_cache, eclass))) {
                        for (; list; list = list->next) {
                                class = list->data;
                                if ((class->rank == rank) && (class->byval_arg.type == (((rank > 1) || bounded) ? MONO_TYPE_ARRAY : MONO_TYPE_SZARRAY))) {
                                        mono_loader_unlock ();
                                        return class;
                                }
                        }
                }
        }

        /* for the building corlib use System.Array from it */
        if (image->assembly && image->assembly->dynamic && image->assembly_name && strcmp (image->assembly_name, "mscorlib") == 0) {
                parent = mono_class_from_name (image, "System", "Array");
                corlib_type = TRUE;
        } else {
                parent = mono_defaults.array_class;
                if (!parent->inited)
                        mono_class_init (parent);
        }

        class = mono_image_alloc0 (image, sizeof (MonoClass));

        class->image = image;
        class->name_space = eclass->name_space;
        nsize = strlen (eclass->name);
        name = g_malloc (nsize + 2 + rank + 1);
        memcpy (name, eclass->name, nsize);
        name [nsize] = '[';
        if (rank > 1)
                memset (name + nsize + 1, ',', rank - 1);
        if (bounded)
                name [nsize + rank] = '*';
        name [nsize + rank + bounded] = ']';
        name [nsize + rank + bounded + 1] = 0;
        class->name = mono_image_strdup (image, name);
        g_free (name);

        mono_profiler_class_event (class, MONO_PROFILE_START_LOAD);

        classes_size += sizeof (MonoClass);

        class->type_token = 0;
        /* all arrays are marked serializable and sealed, bug #42779 */
        class->flags = TYPE_ATTRIBUTE_CLASS | TYPE_ATTRIBUTE_SERIALIZABLE | TYPE_ATTRIBUTE_SEALED | TYPE_ATTRIBUTE_PUBLIC;
        class->parent = parent;
        class->instance_size = mono_class_instance_size (class->parent);

        if (eclass->enumtype && !mono_class_enum_basetype (eclass)) {
                if (!eclass->ref_info_handle || eclass->wastypebuilder) {
                        g_warning ("Only incomplete TypeBuilder objects are allowed to be an enum without base_type");
                        g_assert (eclass->ref_info_handle && !eclass->wastypebuilder);
                }
                /* element_size -1 is ok as this is not an instantitable type*/
                class->sizes.element_size = -1;
        } else
                class->sizes.element_size = mono_class_array_element_size (eclass);

        mono_class_setup_supertypes (class);

        if (eclass->generic_class)
                mono_class_init (eclass);
        if (!eclass->size_inited)
                mono_class_setup_fields (eclass);
        if (eclass->exception_type) /*FIXME we fail the array type, but we have to let other fields be set.*/
                mono_class_set_failure (class, MONO_EXCEPTION_TYPE_LOAD, NULL);

        class->has_references = MONO_TYPE_IS_REFERENCE (&eclass->byval_arg) || eclass->has_references? TRUE: FALSE;

        class->rank = rank;
        
        if (eclass->enumtype)
                class->cast_class = eclass->element_class;
        else
                class->cast_class = eclass;

        switch (class->cast_class->byval_arg.type) {
        case MONO_TYPE_I1:
                class->cast_class = mono_defaults.byte_class;
                break;
        case MONO_TYPE_U2:
                class->cast_class = mono_defaults.int16_class;
                break;
        case MONO_TYPE_U4:
#if SIZEOF_VOID_P == 4
        case MONO_TYPE_I:
        case MONO_TYPE_U:
#endif
                class->cast_class = mono_defaults.int32_class;
                break;
        case MONO_TYPE_U8:
#if SIZEOF_VOID_P == 8
        case MONO_TYPE_I:
        case MONO_TYPE_U:
#endif
                class->cast_class = mono_defaults.int64_class;
                break;
        }

        class->element_class = eclass;

        if ((rank > 1) || bounded) {
                MonoArrayType *at = mono_image_alloc0 (image, sizeof (MonoArrayType));
                class->byval_arg.type = MONO_TYPE_ARRAY;
                class->byval_arg.data.array = at;
                at->eklass = eclass;
                at->rank = rank;
                /* FIXME: complete.... */
        } else {
                class->byval_arg.type = MONO_TYPE_SZARRAY;
                class->byval_arg.data.klass = eclass;
        }
        class->this_arg = class->byval_arg;
        class->this_arg.byref = 1;
        if (corlib_type) {
                class->inited = 1;
        }

        class->generic_container = eclass->generic_container;

        if (rank == 1 && !bounded) {
                MonoClass *prev_class;

                EnterCriticalSection (&image->szarray_cache_lock);
                prev_class = g_hash_table_lookup (image->szarray_cache, eclass);
                if (prev_class)
                        /* Someone got in before us */
                        class = prev_class;
                else
                        g_hash_table_insert (image->szarray_cache, eclass, class);
                LeaveCriticalSection (&image->szarray_cache_lock);
        } else {
                list = g_slist_append (rootlist, class);
                g_hash_table_insert (image->array_cache, eclass, list);
        }

        mono_loader_unlock ();

        mono_profiler_class_loaded (class, MONO_PROFILE_OK);

        return class;
}

/**
 * mono_array_class_get:
 * @element_class: element class 
 * @rank: the dimension of the array class
 *
 * Returns: a class object describing the array with element type @element_type and 
 * dimension @rank. 
 */
MonoClass *
mono_array_class_get (MonoClass *eclass, guint32 rank)
{
        return mono_bounded_array_class_get (eclass, rank, FALSE);
}

/**
 * mono_class_instance_size:
 * @klass: a class 
 * 
 * Returns: the size of an object instance
 */
gint32
mono_class_instance_size (MonoClass *klass)
{       
        if (!klass->size_inited)
                mono_class_init (klass);

        return klass->instance_size;
}

/**
 * mono_class_min_align:
 * @klass: a class 
 * 
 * Returns: minimm alignment requirements 
 */
gint32
mono_class_min_align (MonoClass *klass)
{       
        if (!klass->size_inited)
                mono_class_init (klass);

        return klass->min_align;
}

/**
 * mono_class_value_size:
 * @klass: a class 
 *
 * This function is used for value types, and return the
 * space and the alignment to store that kind of value object.
 *
 * Returns: the size of a value of kind @klass
 */
gint32
mono_class_value_size      (MonoClass *klass, guint32 *align)
{
        gint32 size;

        /* fixme: check disable, because we still have external revereces to
         * mscorlib and Dummy Objects 
         */
        /*g_assert (klass->valuetype);*/

        size = mono_class_instance_size (klass) - sizeof (MonoObject);

        if (align)
                *align = klass->min_align;

        return size;
}

/**
 * mono_class_data_size:
 * @klass: a class 
 * 
 * Returns: the size of the static class data
 */
gint32
mono_class_data_size (MonoClass *klass)
{       
        if (!klass->inited)
                mono_class_init (klass);

        /* in arrays, sizes.class_size is unioned with element_size
         * and arrays have no static fields
         */
        if (klass->rank)
                return 0;
        return klass->sizes.class_size;
}

/*
 * Auxiliary routine to mono_class_get_field
 *
 * Takes a field index instead of a field token.
 */
static MonoClassField *
mono_class_get_field_idx (MonoClass *class, int idx)
{
        mono_class_setup_fields_locking (class);
        if (class->exception_type)
                return NULL;

        while (class) {
                if (class->image->uncompressed_metadata) {
                        /* 
                         * class->field.first points to the FieldPtr table, while idx points into the
                         * Field table, so we have to do a search.
                         */
                        /*FIXME this is broken for types with multiple fields with the same name.*/
                        const char *name = mono_metadata_string_heap (class->image, mono_metadata_decode_row_col (&class->image->tables [MONO_TABLE_FIELD], idx, MONO_FIELD_NAME));
                        int i;

                        for (i = 0; i < class->field.count; ++i)
                                if (mono_field_get_name (&class->fields [i]) == name)
                                        return &class->fields [i];
                        g_assert_not_reached ();
                } else {                        
                        if (class->field.count) {
                                if ((idx >= class->field.first) && (idx < class->field.first + class->field.count)){
                                        return &class->fields [idx - class->field.first];
                                }
                        }
                }
                class = class->parent;
        }
        return NULL;
}

/**
 * mono_class_get_field:
 * @class: the class to lookup the field.
 * @field_token: the field token
 *
 * Returns: A MonoClassField representing the type and offset of
 * the field, or a NULL value if the field does not belong to this
 * class.
 */
MonoClassField *
mono_class_get_field (MonoClass *class, guint32 field_token)
{
        int idx = mono_metadata_token_index (field_token);

        g_assert (mono_metadata_token_code (field_token) == MONO_TOKEN_FIELD_DEF);

        return mono_class_get_field_idx (class, idx - 1);
}

/**
 * mono_class_get_field_from_name:
 * @klass: the class to lookup the field.
 * @name: the field name
 *
 * Search the class @klass and it's parents for a field with the name @name.
 * 
 * Returns: the MonoClassField pointer of the named field or NULL
 */
MonoClassField *
mono_class_get_field_from_name (MonoClass *klass, const char *name)
{
        return mono_class_get_field_from_name_full (klass, name, NULL);
}

/**
 * mono_class_get_field_from_name_full:
 * @klass: the class to lookup the field.
 * @name: the field name
 * @type: the type of the fields. This optional.
 *
 * Search the class @klass and it's parents for a field with the name @name and type @type.
 *
 * If @klass is an inflated generic type, the type comparison is done with the equivalent field
 * of its generic type definition.
 *
 * Returns: the MonoClassField pointer of the named field or NULL
 */
MonoClassField *
mono_class_get_field_from_name_full (MonoClass *klass, const char *name, MonoType *type)
{
        int i;

        mono_class_setup_fields_locking (klass);
        if (klass->exception_type)
                return NULL;

        while (klass) {
                for (i = 0; i < klass->field.count; ++i) {
                        MonoClassField *field = &klass->fields [i];

                        if (strcmp (name, mono_field_get_name (field)) != 0)
                                continue;

                        if (type) {
                                MonoType *field_type = mono_metadata_get_corresponding_field_from_generic_type_definition (field)->type;
                                if (!mono_metadata_type_equal_full (type, field_type, TRUE))
                                        continue;
                        }
                        return field;
                }
                klass = klass->parent;
        }
        return NULL;
}

/**
 * mono_class_get_field_token:
 * @field: the field we need the token of
 *
 * Get the token of a field. Note that the tokesn is only valid for the image
 * the field was loaded from. Don't use this function for fields in dynamic types.
 * 
 * Returns: the token representing the field in the image it was loaded from.
 */
guint32
mono_class_get_field_token (MonoClassField *field)
{
        MonoClass *klass = field->parent;
        int i;

        mono_class_setup_fields_locking (klass);
        if (klass->exception_type)
                return 0;

        while (klass) {
                for (i = 0; i < klass->field.count; ++i) {
                        if (&klass->fields [i] == field) {
                                int idx = klass->field.first + i + 1;

                                if (klass->image->uncompressed_metadata)
                                        idx = mono_metadata_translate_token_index (klass->image, MONO_TABLE_FIELD, idx);
                                return mono_metadata_make_token (MONO_TABLE_FIELD, idx);
                        }
                }
                klass = klass->parent;
        }

        g_assert_not_reached ();
        return 0;
}

static int
mono_field_get_index (MonoClassField *field)
{
        int index = field - field->parent->fields;

        g_assert (index >= 0 && index < field->parent->field.count);

        return index;
}

/*
 * mono_class_get_field_default_value:
 *
 * Return the default value of the field as a pointer into the metadata blob.
 */
const char*
mono_class_get_field_default_value (MonoClassField *field, MonoTypeEnum *def_type)
{
        guint32 cindex;
        guint32 constant_cols [MONO_CONSTANT_SIZE];
        int field_index;
        MonoClass *klass = field->parent;

        g_assert (field->type->attrs & FIELD_ATTRIBUTE_HAS_DEFAULT);

        if (!klass->ext || !klass->ext->field_def_values) {
                mono_loader_lock ();
                mono_class_alloc_ext (klass);
                if (!klass->ext->field_def_values)
                        klass->ext->field_def_values = mono_class_alloc0 (klass, sizeof (MonoFieldDefaultValue) * klass->field.count);
                mono_loader_unlock ();
        }

        field_index = mono_field_get_index (field);
                
        if (!klass->ext->field_def_values [field_index].data) {
                cindex = mono_metadata_get_constant_index (field->parent->image, mono_class_get_field_token (field), 0);
                g_assert (cindex);
                g_assert (!(field->type->attrs & FIELD_ATTRIBUTE_HAS_FIELD_RVA));

                mono_metadata_decode_row (&field->parent->image->tables [MONO_TABLE_CONSTANT], cindex - 1, constant_cols, MONO_CONSTANT_SIZE);
                klass->ext->field_def_values [field_index].def_type = constant_cols [MONO_CONSTANT_TYPE];
                klass->ext->field_def_values [field_index].data = (gpointer)mono_metadata_blob_heap (field->parent->image, constant_cols [MONO_CONSTANT_VALUE]);
        }

        *def_type = klass->ext->field_def_values [field_index].def_type;
        return klass->ext->field_def_values [field_index].data;
}

/*
 * mono_class_get_property_default_value:
 *
 * Return the default value of the field as a pointer into the metadata blob.
 */
const char*
mono_class_get_property_default_value (MonoProperty *property, MonoTypeEnum *def_type)
{
        guint32 cindex;
        guint32 constant_cols [MONO_CONSTANT_SIZE];
        MonoClass *klass = property->parent;

        g_assert (property->attrs & PROPERTY_ATTRIBUTE_HAS_DEFAULT);
        /*We don't cache here because it is not used by C# so it's quite rare.*/

        cindex = mono_metadata_get_constant_index (klass->image, mono_class_get_property_token (property), 0);
        if (!cindex)
                return NULL;

        mono_metadata_decode_row (&klass->image->tables [MONO_TABLE_CONSTANT], cindex - 1, constant_cols, MONO_CONSTANT_SIZE);
        *def_type = constant_cols [MONO_CONSTANT_TYPE];
        return (gpointer)mono_metadata_blob_heap (klass->image, constant_cols [MONO_CONSTANT_VALUE]);
}

guint32
mono_class_get_event_token (MonoEvent *event)
{
        MonoClass *klass = event->parent;
        int i;

        while (klass) {
                if (klass->ext) {
                        for (i = 0; i < klass->ext->event.count; ++i) {
                                if (&klass->ext->events [i] == event)
                                        return mono_metadata_make_token (MONO_TABLE_EVENT, klass->ext->event.first + i + 1);
                        }
                }
                klass = klass->parent;
        }

        g_assert_not_reached ();
        return 0;
}

MonoProperty*
mono_class_get_property_from_name (MonoClass *klass, const char *name)
{
        while (klass) {
                MonoProperty* p;
                gpointer iter = NULL;
                while ((p = mono_class_get_properties (klass, &iter))) {
                        if (! strcmp (name, p->name))
                                return p;
                }
                klass = klass->parent;
        }
        return NULL;
}

guint32
mono_class_get_property_token (MonoProperty *prop)
{
        MonoClass *klass = prop->parent;
        while (klass) {
                MonoProperty* p;
                int i = 0;
                gpointer iter = NULL;
                while ((p = mono_class_get_properties (klass, &iter))) {
                        if (&klass->ext->properties [i] == prop)
                                return mono_metadata_make_token (MONO_TABLE_PROPERTY, klass->ext->property.first + i + 1);
                        
                        i ++;
                }
                klass = klass->parent;
        }

        g_assert_not_reached ();
        return 0;
}

char *
mono_class_name_from_token (MonoImage *image, guint32 type_token)
{
        const char *name, *nspace;
        if (image->dynamic)
                return g_strdup_printf ("DynamicType 0x%08x", type_token);
        
        switch (type_token & 0xff000000){
        case MONO_TOKEN_TYPE_DEF: {
                guint32 cols [MONO_TYPEDEF_SIZE];
                MonoTableInfo *tt = &image->tables [MONO_TABLE_TYPEDEF];
                guint tidx = mono_metadata_token_index (type_token);

                if (tidx > tt->rows)
                        return g_strdup_printf ("Invalid type token 0x%08x", type_token);

                mono_metadata_decode_row (tt, tidx - 1, cols, MONO_TYPEDEF_SIZE);
                name = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
                nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
                if (strlen (nspace) == 0)
                        return g_strdup_printf ("%s", name);
                else
                        return g_strdup_printf ("%s.%s", nspace, name);
        }

        case MONO_TOKEN_TYPE_REF: {
                guint32 cols [MONO_TYPEREF_SIZE];
                MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEREF];
                guint tidx = mono_metadata_token_index (type_token);

                if (tidx > t->rows)
                        return g_strdup_printf ("Invalid type token 0x%08x", type_token);
                mono_metadata_decode_row (t, tidx-1, cols, MONO_TYPEREF_SIZE);
                name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
                nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
                if (strlen (nspace) == 0)
                        return g_strdup_printf ("%s", name);
                else
                        return g_strdup_printf ("%s.%s", nspace, name);
        }
                
        case MONO_TOKEN_TYPE_SPEC:
                return g_strdup_printf ("Typespec 0x%08x", type_token);
        default:
                return g_strdup_printf ("Invalid type token 0x%08x", type_token);
        }
}

static char *
mono_assembly_name_from_token (MonoImage *image, guint32 type_token)
{
        if (image->dynamic)
                return g_strdup_printf ("DynamicAssembly %s", image->name);
        
        switch (type_token & 0xff000000){
        case MONO_TOKEN_TYPE_DEF:
                return mono_stringify_assembly_name (&image->assembly->aname);
                break;
        case MONO_TOKEN_TYPE_REF: {
                MonoAssemblyName aname;
                guint32 cols [MONO_TYPEREF_SIZE];
                MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEREF];
                guint32 idx = mono_metadata_token_index (type_token);

                if (idx > t->rows)
                        return g_strdup_printf ("Invalid type token 0x%08x", type_token);
        
                mono_metadata_decode_row (t, idx-1, cols, MONO_TYPEREF_SIZE);

                idx = cols [MONO_TYPEREF_SCOPE] >> MONO_RESOLTION_SCOPE_BITS;
                switch (cols [MONO_TYPEREF_SCOPE] & MONO_RESOLTION_SCOPE_MASK) {
                case MONO_RESOLTION_SCOPE_MODULE:
                        /* FIXME: */
                        return g_strdup ("");
                case MONO_RESOLTION_SCOPE_MODULEREF:
                        /* FIXME: */
                        return g_strdup ("");
                case MONO_RESOLTION_SCOPE_TYPEREF:
                        /* FIXME: */
                        return g_strdup ("");
                case MONO_RESOLTION_SCOPE_ASSEMBLYREF:
                        mono_assembly_get_assemblyref (image, idx - 1, &aname);
                        return mono_stringify_assembly_name (&aname);
                default:
                        g_assert_not_reached ();
                }
                break;
        }
        case MONO_TOKEN_TYPE_SPEC:
                /* FIXME: */
                return g_strdup ("");
        default:
                g_assert_not_reached ();
        }

        return NULL;
}

/**
 * mono_class_get_full:
 * @image: the image where the class resides
 * @type_token: the token for the class
 * @context: the generic context used to evaluate generic instantiations in
 *
 * Returns: the MonoClass that represents @type_token in @image
 */
MonoClass *
mono_class_get_full (MonoImage *image, guint32 type_token, MonoGenericContext *context)
{
        MonoError error;
        MonoClass *class = NULL;

        if (image->dynamic) {
                int table = mono_metadata_token_table (type_token);

                if (table != MONO_TABLE_TYPEDEF && table != MONO_TABLE_TYPEREF && table != MONO_TABLE_TYPESPEC) {
                        mono_loader_set_error_bad_image (g_strdup ("Bad type token."));
                        return NULL;
                }
                return mono_lookup_dynamic_token (image, type_token, context);
        }

        switch (type_token & 0xff000000){
        case MONO_TOKEN_TYPE_DEF:
                class = mono_class_create_from_typedef (image, type_token);
                break;          
        case MONO_TOKEN_TYPE_REF:
                class = mono_class_from_typeref (image, type_token);
                break;
        case MONO_TOKEN_TYPE_SPEC:
                class = mono_class_create_from_typespec (image, type_token, context, &error);
                if (!mono_error_ok (&error)) {
                        /*FIXME don't swallow the error message*/
                        mono_error_cleanup (&error);
                }
                break;
        default:
                g_warning ("unknown token type %x", type_token & 0xff000000);
                g_assert_not_reached ();
        }

        if (!class){
                char *name = mono_class_name_from_token (image, type_token);
                char *assembly = mono_assembly_name_from_token (image, type_token);
                mono_loader_set_error_type_load (name, assembly);
                g_free (name);
                g_free (assembly);
        }

        return class;
}


/**
 * mono_type_get_full:
 * @image: the image where the type resides
 * @type_token: the token for the type
 * @context: the generic context used to evaluate generic instantiations in
 *
 * This functions exists to fullfill the fact that sometimes it's desirable to have access to the 
 * 
 * Returns: the MonoType that represents @type_token in @image
 */
MonoType *
mono_type_get_full (MonoImage *image, guint32 type_token, MonoGenericContext *context)
{
        MonoError error;
        MonoType *type = NULL;
        gboolean inflated = FALSE;

        //FIXME: this will not fix the very issue for which mono_type_get_full exists -but how to do it then?
        if (image->dynamic)
                return mono_class_get_type (mono_lookup_dynamic_token (image, type_token, context));

        if ((type_token & 0xff000000) != MONO_TOKEN_TYPE_SPEC) {
                MonoClass *class = mono_class_get_full (image, type_token, context);
                return class ? mono_class_get_type (class) : NULL;
        }

        type = mono_type_retrieve_from_typespec (image, type_token, context, &inflated, &error);

        if (!mono_error_ok (&error)) {
                /*FIXME don't swalloc the error message.*/
                char *name = mono_class_name_from_token (image, type_token);
                char *assembly = mono_assembly_name_from_token (image, type_token);

                g_warning ("Error loading type %s from %s due to %s", name, assembly, mono_error_get_message (&error));

                mono_error_cleanup (&error);
                mono_loader_set_error_type_load (name, assembly);
                return NULL;
        }

        if (inflated) {
                MonoType *tmp = type;
                type = mono_class_get_type (mono_class_from_mono_type (type));
                /* FIXME: This is a workaround fo the fact that a typespec token sometimes reference to the generic type definition.
                 * A MonoClass::byval_arg of a generic type definion has type CLASS.
                 * Some parts of mono create a GENERICINST to reference a generic type definition and this generates confict with byval_arg.
                 *
                 * The long term solution is to chaise this places and make then set MonoType::type correctly.
                 * */
                if (type->type != tmp->type)
                        type = tmp;
                else
                        mono_metadata_free_type (tmp);
        }
        return type;
}


MonoClass *
mono_class_get (MonoImage *image, guint32 type_token)
{
        return mono_class_get_full (image, type_token, NULL);
}

/**
 * mono_image_init_name_cache:
 *
 *  Initializes the class name cache stored in image->name_cache.
 *
 * LOCKING: Acquires the corresponding image lock.
 */
void
mono_image_init_name_cache (MonoImage *image)
{
        MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEDEF];
        guint32 cols [MONO_TYPEDEF_SIZE];
        const char *name;
        const char *nspace;
        guint32 i, visib, nspace_index;
        GHashTable *name_cache2, *nspace_table;

        mono_image_lock (image);

        if (image->name_cache) {
                mono_image_unlock (image);
                return;
        }

        image->name_cache = g_hash_table_new (g_str_hash, g_str_equal);

        if (image->dynamic) {
                mono_image_unlock (image);
                return;
        }

        /* Temporary hash table to avoid lookups in the nspace_table */
        name_cache2 = g_hash_table_new (NULL, NULL);

        for (i = 1; i <= t->rows; ++i) {
                mono_metadata_decode_row (t, i - 1, cols, MONO_TYPEDEF_SIZE);
                visib = cols [MONO_TYPEDEF_FLAGS] & TYPE_ATTRIBUTE_VISIBILITY_MASK;
                /*
                 * Nested types are accessed from the nesting name.  We use the fact that nested types use different visibility flags
                 * than toplevel types, thus avoiding the need to grovel through the NESTED_TYPE table
                 */
                if (visib >= TYPE_ATTRIBUTE_NESTED_PUBLIC && visib <= TYPE_ATTRIBUTE_NESTED_FAM_OR_ASSEM)
                        continue;
                name = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
                nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);

                nspace_index = cols [MONO_TYPEDEF_NAMESPACE];
                nspace_table = g_hash_table_lookup (name_cache2, GUINT_TO_POINTER (nspace_index));
                if (!nspace_table) {
                        nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
                        g_hash_table_insert (image->name_cache, (char*)nspace, nspace_table);
                        g_hash_table_insert (name_cache2, GUINT_TO_POINTER (nspace_index),
                                                                 nspace_table);
                }
                g_hash_table_insert (nspace_table, (char *) name, GUINT_TO_POINTER (i));
        }

        /* Load type names from EXPORTEDTYPES table */
        {
                MonoTableInfo  *t = &image->tables [MONO_TABLE_EXPORTEDTYPE];
                guint32 cols [MONO_EXP_TYPE_SIZE];
                int i;

                for (i = 0; i < t->rows; ++i) {
                        mono_metadata_decode_row (t, i, cols, MONO_EXP_TYPE_SIZE);
                        name = mono_metadata_string_heap (image, cols [MONO_EXP_TYPE_NAME]);
                        nspace = mono_metadata_string_heap (image, cols [MONO_EXP_TYPE_NAMESPACE]);

                        nspace_index = cols [MONO_EXP_TYPE_NAMESPACE];
                        nspace_table = g_hash_table_lookup (name_cache2, GUINT_TO_POINTER (nspace_index));
                        if (!nspace_table) {
                                nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
                                g_hash_table_insert (image->name_cache, (char*)nspace, nspace_table);
                                g_hash_table_insert (name_cache2, GUINT_TO_POINTER (nspace_index),
                                                                         nspace_table);
                        }
                        g_hash_table_insert (nspace_table, (char *) name, GUINT_TO_POINTER (mono_metadata_make_token (MONO_TABLE_EXPORTEDTYPE, i + 1)));
                }
        }

        g_hash_table_destroy (name_cache2);
        mono_image_unlock (image);
}

/*FIXME Only dynamic assemblies should allow this operation.*/
void
mono_image_add_to_name_cache (MonoImage *image, const char *nspace, 
                                                          const char *name, guint32 index)
{
        GHashTable *nspace_table;
        GHashTable *name_cache;
        guint32 old_index;

        mono_image_lock (image);

        if (!image->name_cache)
                mono_image_init_name_cache (image);

        name_cache = image->name_cache;
        if (!(nspace_table = g_hash_table_lookup (name_cache, nspace))) {
                nspace_table = g_hash_table_new (g_str_hash, g_str_equal);
                g_hash_table_insert (name_cache, (char *)nspace, (char *)nspace_table);
        }

        if ((old_index = GPOINTER_TO_UINT (g_hash_table_lookup (nspace_table, (char*) name))))
                g_error ("overrwritting old token %x on image %s for type %s::%s", old_index, image->name, nspace, name);

        g_hash_table_insert (nspace_table, (char *) name, GUINT_TO_POINTER (index));

        mono_image_unlock (image);
}

typedef struct {
        gconstpointer key;
        gpointer value;
} FindUserData;

static void
find_nocase (gpointer key, gpointer value, gpointer user_data)
{
        char *name = (char*)key;
        FindUserData *data = (FindUserData*)user_data;

        if (!data->value && (mono_utf8_strcasecmp (name, (char*)data->key) == 0))
                data->value = value;
}

/**
 * mono_class_from_name_case:
 * @image: The MonoImage where the type is looked up in
 * @name_space: the type namespace
 * @name: the type short name.
 *
 * Obtains a MonoClass with a given namespace and a given name which
 * is located in the given MonoImage.   The namespace and name
 * lookups are case insensitive.
 */
MonoClass *
mono_class_from_name_case (MonoImage *image, const char* name_space, const char *name)
{
        MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEDEF];
        guint32 cols [MONO_TYPEDEF_SIZE];
        const char *n;
        const char *nspace;
        guint32 i, visib;

        if (image->dynamic) {
                guint32 token = 0;
                FindUserData user_data;

                mono_image_lock (image);

                if (!image->name_cache)
                        mono_image_init_name_cache (image);

                user_data.key = name_space;
                user_data.value = NULL;
                g_hash_table_foreach (image->name_cache, find_nocase, &user_data);

                if (user_data.value) {
                        GHashTable *nspace_table = (GHashTable*)user_data.value;

                        user_data.key = name;
                        user_data.value = NULL;

                        g_hash_table_foreach (nspace_table, find_nocase, &user_data);
                        
                        if (user_data.value)
                                token = GPOINTER_TO_UINT (user_data.value);
                }

                mono_image_unlock (image);
                
                if (token)
                        return mono_class_get (image, MONO_TOKEN_TYPE_DEF | token);
                else
                        return NULL;

        }

        /* add a cache if needed */
        for (i = 1; i <= t->rows; ++i) {
                mono_metadata_decode_row (t, i - 1, cols, MONO_TYPEDEF_SIZE);
                visib = cols [MONO_TYPEDEF_FLAGS] & TYPE_ATTRIBUTE_VISIBILITY_MASK;
                /*
                 * Nested types are accessed from the nesting name.  We use the fact that nested types use different visibility flags
                 * than toplevel types, thus avoiding the need to grovel through the NESTED_TYPE table
                 */
                if (visib >= TYPE_ATTRIBUTE_NESTED_PUBLIC && visib <= TYPE_ATTRIBUTE_NESTED_FAM_OR_ASSEM)
                        continue;
                n = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
                nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
                if (mono_utf8_strcasecmp (n, name) == 0 && mono_utf8_strcasecmp (nspace, name_space) == 0)
                        return mono_class_get (image, MONO_TOKEN_TYPE_DEF | i);
        }
        return NULL;
}

static MonoClass*
return_nested_in (MonoClass *class, char *nested)
{
        MonoClass *found;
        char *s = strchr (nested, '/');
        gpointer iter = NULL;

        if (s) {
                *s = 0;
                s++;
        }

        while ((found = mono_class_get_nested_types (class, &iter))) {
                if (strcmp (found->name, nested) == 0) {
                        if (s)
                                return return_nested_in (found, s);
                        return found;
                }
        }
        return NULL;
}

static MonoClass*
search_modules (MonoImage *image, const char *name_space, const char *name)
{
        MonoTableInfo *file_table = &image->tables [MONO_TABLE_FILE];
        MonoImage *file_image;
        MonoClass *class;
        int i;

        /* 
         * The EXPORTEDTYPES table only contains public types, so have to search the
         * modules as well.
         * Note: image->modules contains the contents of the MODULEREF table, while
         * the real module list is in the FILE table.
         */
        for (i = 0; i < file_table->rows; i++) {
                guint32 cols [MONO_FILE_SIZE];
                mono_metadata_decode_row (file_table, i, cols, MONO_FILE_SIZE);
                if (cols [MONO_FILE_FLAGS] == FILE_CONTAINS_NO_METADATA)
                        continue;

                file_image = mono_image_load_file_for_image (image, i + 1);
                if (file_image) {
                        class = mono_class_from_name (file_image, name_space, name);
                        if (class)
                                return class;
                }
        }

        return NULL;
}

/**
 * mono_class_from_name:
 * @image: The MonoImage where the type is looked up in
 * @name_space: the type namespace
 * @name: the type short name.
 *
 * Obtains a MonoClass with a given namespace and a given name which
 * is located in the given MonoImage.   
 */
MonoClass *
mono_class_from_name (MonoImage *image, const char* name_space, const char *name)
{
        GHashTable *nspace_table;
        MonoImage *loaded_image;
        guint32 token = 0;
        int i;
        MonoClass *class;
        char *nested;
        char buf [1024];

        if ((nested = strchr (name, '/'))) {
                int pos = nested - name;
                int len = strlen (name);
                if (len > 1023)
                        return NULL;
                memcpy (buf, name, len + 1);
                buf [pos] = 0;
                nested = buf + pos + 1;
                name = buf;
        }

        if (get_class_from_name) {
                gboolean res = get_class_from_name (image, name_space, name, &class);
                if (res) {
                        if (!class)
                                class = search_modules (image, name_space, name);
                        if (nested)
                                return class ? return_nested_in (class, nested) : NULL;
                        else
                                return class;
                }
        }

        mono_image_lock (image);

        if (!image->name_cache)
                mono_image_init_name_cache (image);

        nspace_table = g_hash_table_lookup (image->name_cache, name_space);

        if (nspace_table)
                token = GPOINTER_TO_UINT (g_hash_table_lookup (nspace_table, name));

        mono_image_unlock (image);

        if (!token && image->dynamic && image->modules) {
                /* Search modules as well */
                for (i = 0; i < image->module_count; ++i) {
                        MonoImage *module = image->modules [i];

                        class = mono_class_from_name (module, name_space, name);
                        if (class)
                                return class;
                }
        }

        if (!token) {
                class = search_modules (image, name_space, name);
                if (class)
                        return class;
        }

        if (!token)
                return NULL;

        if (mono_metadata_token_table (token) == MONO_TABLE_EXPORTEDTYPE) {
                MonoTableInfo  *t = &image->tables [MONO_TABLE_EXPORTEDTYPE];
                guint32 cols [MONO_EXP_TYPE_SIZE];
                guint32 idx, impl;

                idx = mono_metadata_token_index (token);

                mono_metadata_decode_row (t, idx - 1, cols, MONO_EXP_TYPE_SIZE);

                impl = cols [MONO_EXP_TYPE_IMPLEMENTATION];
                if ((impl & MONO_IMPLEMENTATION_MASK) == MONO_IMPLEMENTATION_FILE) {
                        loaded_image = mono_assembly_load_module (image->assembly, impl >> MONO_IMPLEMENTATION_BITS);
                        if (!loaded_image)
                                return NULL;
                        class = mono_class_from_name (loaded_image, name_space, name);
                        if (nested)
                                return return_nested_in (class, nested);
                        return class;
                } else if ((impl & MONO_IMPLEMENTATION_MASK) == MONO_IMPLEMENTATION_ASSEMBLYREF) {
                        guint32 assembly_idx;

                        assembly_idx = impl >> MONO_IMPLEMENTATION_BITS;

                        mono_assembly_load_reference (image, assembly_idx - 1);
                        g_assert (image->references [assembly_idx - 1]);
                        if (image->references [assembly_idx - 1] == (gpointer)-1)
                                return NULL;                    
                        else
                                /* FIXME: Cycle detection */
                                return mono_class_from_name (image->references [assembly_idx - 1]->image, name_space, name);
                } else {
                        g_error ("not yet implemented");
                }
        }

        token = MONO_TOKEN_TYPE_DEF | token;

        class = mono_class_get (image, token);
        if (nested)
                return return_nested_in (class, nested);
        return class;
}

/*FIXME test for interfaces with variant generic arguments*/
gboolean
mono_class_is_subclass_of (MonoClass *klass, MonoClass *klassc, 
                           gboolean check_interfaces)
{
        g_assert (klassc->idepth > 0);
        if (check_interfaces && MONO_CLASS_IS_INTERFACE (klassc) && !MONO_CLASS_IS_INTERFACE (klass)) {
                if (MONO_CLASS_IMPLEMENTS_INTERFACE (klass, klassc->interface_id))
                        return TRUE;
        } else if (check_interfaces && MONO_CLASS_IS_INTERFACE (klassc) && MONO_CLASS_IS_INTERFACE (klass)) {
                int i;

                for (i = 0; i < klass->interface_count; i ++) {
                        MonoClass *ic =  klass->interfaces [i];
                        if (ic == klassc)
                                return TRUE;
                }
        } else {
                if (!MONO_CLASS_IS_INTERFACE (klass) && mono_class_has_parent (klass, klassc))
                        return TRUE;
        }

        /* 
         * MS.NET thinks interfaces are a subclass of Object, so we think it as
         * well.
         */
        if (klassc == mono_defaults.object_class)
                return TRUE;

        return FALSE;
}

gboolean
mono_class_has_variant_generic_params (MonoClass *klass)
{
        int i;
        MonoGenericContainer *container;

        if (!klass->generic_class)
                return FALSE;

        container = klass->generic_class->container_class->generic_container;

        for (i = 0; i < container->type_argc; ++i)
                if (mono_generic_container_get_param_info (container, i)->flags & (MONO_GEN_PARAM_VARIANT|MONO_GEN_PARAM_COVARIANT))
                        return TRUE;

        return FALSE;
}

/**
 * @container the generic container from the GTD
 * @klass: the class to be assigned to
 * @oklass: the source class
 * 
 * Both klass and oklass must be instances of the same generic interface.
 * Return true if @klass can be assigned to a @klass variable
 */
static gboolean
mono_class_is_variant_compatible (MonoClass *klass, MonoClass *oklass)
{
        int j;
        MonoType **klass_argv, **oklass_argv;
        MonoClass *klass_gtd = mono_class_get_generic_type_definition (klass);
        MonoGenericContainer *container = klass_gtd->generic_container;

        /*Viable candidates are instances of the same generic interface*/
        if (mono_class_get_generic_type_definition (oklass) != klass_gtd)
                return FALSE;

        klass_argv = &klass->generic_class->context.class_inst->type_argv [0];
        oklass_argv = &oklass->generic_class->context.class_inst->type_argv [0];

        for (j = 0; j < container->type_argc; ++j) {
                MonoClass *param1_class = mono_class_from_mono_type (klass_argv [j]);
                MonoClass *param2_class = mono_class_from_mono_type (oklass_argv [j]);

                if (param1_class->valuetype != param2_class->valuetype)
                        return FALSE;

                /*
                 * The _VARIANT and _COVARIANT constants should read _COVARIANT and
                 * _CONTRAVARIANT, but they are in a public header so we can't fix it.
                 */
                if (param1_class != param2_class) {
                        if (mono_generic_container_get_param_info (container, j)->flags & MONO_GEN_PARAM_VARIANT) {
                                if (!mono_class_is_assignable_from (param1_class, param2_class))
                                        return FALSE;
                        } else if (mono_generic_container_get_param_info (container, j)->flags & MONO_GEN_PARAM_COVARIANT) {
                                if (!mono_class_is_assignable_from (param2_class, param1_class))
                                        return FALSE;
                        } else
                                return FALSE;
                }
        }
        return TRUE;
}

/**
 * mono_class_is_assignable_from:
 * @klass: the class to be assigned to
 * @oklass: the source class
 *
 * Return: true if an instance of object oklass can be assigned to an
 * instance of object @klass
 */
gboolean
mono_class_is_assignable_from (MonoClass *klass, MonoClass *oklass)
{
        if (!klass->inited)
                mono_class_init (klass);

        if (!oklass->inited)
                mono_class_init (oklass);

        if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR))
                return klass == oklass;

        if (MONO_CLASS_IS_INTERFACE (klass)) {
                if ((oklass->byval_arg.type == MONO_TYPE_VAR) || (oklass->byval_arg.type == MONO_TYPE_MVAR))
                        return FALSE;

                /* interface_offsets might not be set for dynamic classes */
                if (oklass->ref_info_handle && !oklass->interface_bitmap)
                        /* 
                         * oklass might be a generic type parameter but they have 
                         * interface_offsets set.
                         */
                        return mono_reflection_call_is_assignable_to (oklass, klass);
                if (!oklass->interface_bitmap)
                        /* Happens with generic instances of not-yet created dynamic types */
                        return FALSE;
                if (MONO_CLASS_IMPLEMENTS_INTERFACE (oklass, klass->interface_id))
                        return TRUE;

                if (mono_class_has_variant_generic_params (klass)) {
                        MonoError error;
                        int i;
                        mono_class_setup_interfaces (oklass, &error);
                        if (!mono_error_ok (&error)) {
                                mono_error_cleanup (&error);
                                return FALSE;
                        }

                        /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
                        for (i = 0; i < oklass->interface_offsets_count; ++i) {
                                MonoClass *iface = oklass->interfaces_packed [i];

                                if (mono_class_is_variant_compatible (klass, iface))
                                        return TRUE;
                        }
                }
                return FALSE;
        } else if (klass->delegate) {
                if (mono_class_has_variant_generic_params (klass) && mono_class_is_variant_compatible (klass, oklass))
                        return TRUE;
        }else if (klass->rank) {
                MonoClass *eclass, *eoclass;

                if (oklass->rank != klass->rank)
                        return FALSE;

                /* vectors vs. one dimensional arrays */
                if (oklass->byval_arg.type != klass->byval_arg.type)
                        return FALSE;

                eclass = klass->cast_class;
                eoclass = oklass->cast_class;

                /* 
                 * a is b does not imply a[] is b[] when a is a valuetype, and
                 * b is a reference type.
                 */

                if (eoclass->valuetype) {
                        if ((eclass == mono_defaults.enum_class) || 
                                (eclass == mono_defaults.enum_class->parent) ||
                                (eclass == mono_defaults.object_class))
                                return FALSE;
                }

                return mono_class_is_assignable_from (klass->cast_class, oklass->cast_class);
        } else if (mono_class_is_nullable (klass)) {
                if (mono_class_is_nullable (oklass))
                        return mono_class_is_assignable_from (klass->cast_class, oklass->cast_class);
                else
                        return mono_class_is_assignable_from (klass->cast_class, oklass);
        } else if (klass == mono_defaults.object_class)
                return TRUE;

        return mono_class_has_parent (oklass, klass);
}       

/*Check if @oklass is variant compatible with @klass.*/
static gboolean
mono_class_is_variant_compatible_slow (MonoClass *klass, MonoClass *oklass)
{
        int j;
        MonoType **klass_argv, **oklass_argv;
        MonoClass *klass_gtd = mono_class_get_generic_type_definition (klass);
        MonoGenericContainer *container = klass_gtd->generic_container;

        /*Viable candidates are instances of the same generic interface*/
        if (mono_class_get_generic_type_definition (oklass) != klass_gtd)
                return FALSE;

        klass_argv = &klass->generic_class->context.class_inst->type_argv [0];
        oklass_argv = &oklass->generic_class->context.class_inst->type_argv [0];

        for (j = 0; j < container->type_argc; ++j) {
                MonoClass *param1_class = mono_class_from_mono_type (klass_argv [j]);
                MonoClass *param2_class = mono_class_from_mono_type (oklass_argv [j]);

                if (param1_class->valuetype != param2_class->valuetype)
                        return FALSE;

                /*
                 * The _VARIANT and _COVARIANT constants should read _COVARIANT and
                 * _CONTRAVARIANT, but they are in a public header so we can't fix it.
                 */
                if (param1_class != param2_class) {
                        if (mono_generic_container_get_param_info (container, j)->flags & MONO_GEN_PARAM_VARIANT) {
                                if (!mono_class_is_assignable_from_slow (param1_class, param2_class))
                                        return FALSE;
                        } else if (mono_generic_container_get_param_info (container, j)->flags & MONO_GEN_PARAM_COVARIANT) {
                                if (!mono_class_is_assignable_from_slow (param2_class, param1_class))
                                        return FALSE;
                        } else
                                return FALSE;
                }
        }
        return TRUE;
}
/*Check if @candidate implements the interface @target*/
static gboolean
mono_class_implement_interface_slow (MonoClass *target, MonoClass *candidate)
{
        MonoError error;
        int i;
        gboolean is_variant = mono_class_has_variant_generic_params (target);

        if (is_variant && MONO_CLASS_IS_INTERFACE (candidate)) {
                if (mono_class_is_variant_compatible_slow (target, candidate))
                        return TRUE;
        }

        do {
                if (candidate == target)
                        return TRUE;

                /*A TypeBuilder can have more interfaces on tb->interfaces than on candidate->interfaces*/
                if (candidate->image->dynamic && !candidate->wastypebuilder) {
                        MonoReflectionTypeBuilder *tb = mono_class_get_ref_info (candidate);
                        int j;
                        if (tb && tb->interfaces) {
                                for (j = mono_array_length (tb->interfaces) - 1; j >= 0; --j) {
                                        MonoReflectionType *iface = mono_array_get (tb->interfaces, MonoReflectionType*, j);
                                        MonoClass *iface_class = mono_class_from_mono_type (iface->type);
                                        if (iface_class == target)
                                                return TRUE;
                                        if (is_variant && mono_class_is_variant_compatible_slow (target, iface_class))
                                                return TRUE;
                                        if (mono_class_implement_interface_slow (target, iface_class))
                                                return TRUE;
                                }
                        }
                } else {
                        /*setup_interfaces don't mono_class_init anything*/
                        mono_class_setup_interfaces (candidate, &error);
                        if (!mono_error_ok (&error)) {
                                mono_error_cleanup (&error);
                                return FALSE;
                        }

                        for (i = 0; i < candidate->interface_count; ++i) {
                                if (candidate->interfaces [i] == target)
                                        return TRUE;
                                
                                if (is_variant && mono_class_is_variant_compatible_slow (target, candidate->interfaces [i]))
                                        return TRUE;

                                 if (mono_class_implement_interface_slow (target, candidate->interfaces [i]))
                                        return TRUE;
                        }
                }
                candidate = candidate->parent;
        } while (candidate);

        return FALSE;
}

/*
 * Check if @oklass can be assigned to @klass.
 * This function does the same as mono_class_is_assignable_from but is safe to be used from mono_class_init context.
 */
gboolean
mono_class_is_assignable_from_slow (MonoClass *target, MonoClass *candidate)
{
        if (candidate == target)
                return TRUE;
        if (target == mono_defaults.object_class)
                return TRUE;

        /*setup_supertypes don't mono_class_init anything */
        mono_class_setup_supertypes (candidate);
        mono_class_setup_supertypes (target);

        if (mono_class_has_parent (candidate, target))
                return TRUE;

        /*If target is not an interface there is no need to check them.*/
        if (MONO_CLASS_IS_INTERFACE (target))
                return mono_class_implement_interface_slow (target, candidate);

        if (target->delegate && mono_class_has_variant_generic_params (target))
                return mono_class_is_variant_compatible (target, candidate);

        /*FIXME properly handle nullables and arrays */

        return FALSE;
}

/**
 * mono_class_get_cctor:
 * @klass: A MonoClass pointer
 *
 * Returns: the static constructor of @klass if it exists, NULL otherwise.
 */
MonoMethod*
mono_class_get_cctor (MonoClass *klass)
{
        MonoCachedClassInfo cached_info;

        if (klass->image->dynamic) {
                /* 
                 * has_cctor is not set for these classes because mono_class_init () is
                 * not run for them.
                 */
                return mono_class_get_method_from_name_flags (klass, ".cctor", -1, METHOD_ATTRIBUTE_SPECIAL_NAME);
        }

        if (!klass->has_cctor)
                return NULL;

        if (mono_class_get_cached_class_info (klass, &cached_info))
                return mono_get_method (klass->image, cached_info.cctor_token, klass);

        if (klass->generic_class && !klass->methods)
                return mono_class_get_inflated_method (klass, mono_class_get_cctor (klass->generic_class->container_class));

        return mono_class_get_method_from_name_flags (klass, ".cctor", -1, METHOD_ATTRIBUTE_SPECIAL_NAME);
}

/**
 * mono_class_get_finalizer:
 * @klass: The MonoClass pointer
 *
 * Returns: the finalizer method of @klass if it exists, NULL otherwise.
 */
MonoMethod*
mono_class_get_finalizer (MonoClass *klass)
{
        MonoCachedClassInfo cached_info;

        if (!klass->inited)
                mono_class_init (klass);
        if (!klass->has_finalize)
                return NULL;

        if (mono_class_get_cached_class_info (klass, &cached_info))
                return mono_get_method (cached_info.finalize_image, cached_info.finalize_token, NULL);
        else {
                mono_class_setup_vtable (klass);
                return klass->vtable [finalize_slot];
        }
}

/**
 * mono_class_needs_cctor_run:
 * @klass: the MonoClass pointer
 * @caller: a MonoMethod describing the caller
 *
 * Determines whenever the class has a static constructor and whenever it
 * needs to be called when executing CALLER.
 */
gboolean
mono_class_needs_cctor_run (MonoClass *klass, MonoMethod *caller)
{
        MonoMethod *method;

        method = mono_class_get_cctor (klass);
        if (method)
                return (method == caller) ? FALSE : TRUE;
        else
                return FALSE;
}

/**
 * mono_class_array_element_size:
 * @klass: 
 *
 * Returns: the number of bytes an element of type @klass
 * uses when stored into an array.
 */
gint32
mono_class_array_element_size (MonoClass *klass)
{
        MonoType *type = &klass->byval_arg;
        
handle_enum:
        switch (type->type) {
        case MONO_TYPE_I1:
        case MONO_TYPE_U1:
        case MONO_TYPE_BOOLEAN:
                return 1;
        case MONO_TYPE_I2:
        case MONO_TYPE_U2:
        case MONO_TYPE_CHAR:
                return 2;
        case MONO_TYPE_I4:
        case MONO_TYPE_U4:
        case MONO_TYPE_R4:
                return 4;
        case MONO_TYPE_I:
        case MONO_TYPE_U:
        case MONO_TYPE_PTR:
        case MONO_TYPE_CLASS:
        case MONO_TYPE_STRING:
        case MONO_TYPE_OBJECT:
        case MONO_TYPE_SZARRAY:
        case MONO_TYPE_ARRAY: 
        case MONO_TYPE_VAR:
        case MONO_TYPE_MVAR:   
                return sizeof (gpointer);
        case MONO_TYPE_I8:
        case MONO_TYPE_U8:
        case MONO_TYPE_R8:
                return 8;
        case MONO_TYPE_VALUETYPE:
                if (type->data.klass->enumtype) {
                        type = mono_class_enum_basetype (type->data.klass);
                        klass = klass->element_class;
                        goto handle_enum;
                }
                return mono_class_instance_size (klass) - sizeof (MonoObject);
        case MONO_TYPE_GENERICINST:
                type = &type->data.generic_class->container_class->byval_arg;
                goto handle_enum;

        case MONO_TYPE_VOID:
                return 0;
                
        default:
                g_error ("unknown type 0x%02x in mono_class_array_element_size", type->type);
        }
        return -1;
}

/**
 * mono_array_element_size:
 * @ac: pointer to a #MonoArrayClass
 *
 * Returns: the size of single array element.
 */
gint32
mono_array_element_size (MonoClass *ac)
{
        g_assert (ac->rank);
        return ac->sizes.element_size;
}

gpointer
mono_ldtoken (MonoImage *image, guint32 token, MonoClass **handle_class,
              MonoGenericContext *context)
{
        if (image->dynamic) {
                MonoClass *tmp_handle_class;
                gpointer obj = mono_lookup_dynamic_token_class (image, token, TRUE, &tmp_handle_class, context);

                g_assert (tmp_handle_class);
                if (handle_class)
                        *handle_class = tmp_handle_class;

                if (tmp_handle_class == mono_defaults.typehandle_class)
                        return &((MonoClass*)obj)->byval_arg;
                else
                        return obj;
        }

        switch (token & 0xff000000) {
        case MONO_TOKEN_TYPE_DEF:
        case MONO_TOKEN_TYPE_REF:
        case MONO_TOKEN_TYPE_SPEC: {
                MonoType *type;
                if (handle_class)
                        *handle_class = mono_defaults.typehandle_class;
                type = mono_type_get_full (image, token, context);
                if (!type)
                        return NULL;
                mono_class_init (mono_class_from_mono_type (type));
                /* We return a MonoType* as handle */
                return type;
        }
        case MONO_TOKEN_FIELD_DEF: {
                MonoClass *class;
                guint32 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
                if (!type)
                        return NULL;
                if (handle_class)
                        *handle_class = mono_defaults.fieldhandle_class;
                class = mono_class_get_full (image, MONO_TOKEN_TYPE_DEF | type, context);
                if (!class)
                        return NULL;
                mono_class_init (class);
                return mono_class_get_field (class, token);
        }
        case MONO_TOKEN_METHOD_DEF:
        case MONO_TOKEN_METHOD_SPEC: {
                MonoMethod *meth;
                meth = mono_get_method_full (image, token, NULL, context);
                if (handle_class)
                        *handle_class = mono_defaults.methodhandle_class;
                return meth;
        }
        case MONO_TOKEN_MEMBER_REF: {
                guint32 cols [MONO_MEMBERREF_SIZE];
                const char *sig;
                mono_metadata_decode_row (&image->tables [MONO_TABLE_MEMBERREF], mono_metadata_token_index (token) - 1, cols, MONO_MEMBERREF_SIZE);
                sig = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
                mono_metadata_decode_blob_size (sig, &sig);
                if (*sig == 0x6) { /* it's a field */
                        MonoClass *klass;
                        MonoClassField *field;
                        field = mono_field_from_token (image, token, &klass, context);
                        if (handle_class)
                                *handle_class = mono_defaults.fieldhandle_class;
                        return field;
                } else {
                        MonoMethod *meth;
                        meth = mono_get_method_full (image, token, NULL, context);
                        if (handle_class)
                                *handle_class = mono_defaults.methodhandle_class;
                        return meth;
                }
        }
        default:
                g_warning ("Unknown token 0x%08x in ldtoken", token);
                break;
        }
        return NULL;
}

/**
 * This function might need to call runtime functions so it can't be part
 * of the metadata library.
 */
static MonoLookupDynamicToken lookup_dynamic = NULL;

void
mono_install_lookup_dynamic_token (MonoLookupDynamicToken func)
{
        lookup_dynamic = func;
}

gpointer
mono_lookup_dynamic_token (MonoImage *image, guint32 token, MonoGenericContext *context)
{
        MonoClass *handle_class;

        return lookup_dynamic (image, token, TRUE, &handle_class, context);
}

gpointer
mono_lookup_dynamic_token_class (MonoImage *image, guint32 token, gboolean valid_token, MonoClass **handle_class, MonoGenericContext *context)
{
        return lookup_dynamic (image, token, valid_token, handle_class, context);
}

static MonoGetCachedClassInfo get_cached_class_info = NULL;

void
mono_install_get_cached_class_info (MonoGetCachedClassInfo func)
{
        get_cached_class_info = func;
}

static gboolean
mono_class_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res)
{
        if (!get_cached_class_info)
                return FALSE;
        else
                return get_cached_class_info (klass, res);
}

void
mono_install_get_class_from_name (MonoGetClassFromName func)
{
        get_class_from_name = func;
}

MonoImage*
mono_class_get_image (MonoClass *klass)
{
        return klass->image;
}

/**
 * mono_class_get_element_class:
 * @klass: the MonoClass to act on
 *
 * Returns: the element class of an array or an enumeration.
 */
MonoClass*
mono_class_get_element_class (MonoClass *klass)
{
        return klass->element_class;
}

/**
 * mono_class_is_valuetype:
 * @klass: the MonoClass to act on
 *
 * Returns: true if the MonoClass represents a ValueType.
 */
gboolean
mono_class_is_valuetype (MonoClass *klass)
{
        return klass->valuetype;
}

/**
 * mono_class_is_enum:
 * @klass: the MonoClass to act on
 *
 * Returns: true if the MonoClass represents an enumeration.
 */
gboolean
mono_class_is_enum (MonoClass *klass)
{
        return klass->enumtype;
}

/**
 * mono_class_enum_basetype:
 * @klass: the MonoClass to act on
 *
 * Returns: the underlying type representation for an enumeration.
 */
MonoType*
mono_class_enum_basetype (MonoClass *klass)
{
        if (klass->element_class == klass)
                /* SRE or broken types */
                return NULL;
        else
                return &klass->element_class->byval_arg;
}

/**
 * mono_class_get_parent
 * @klass: the MonoClass to act on
 *
 * Returns: the parent class for this class.
 */
MonoClass*
mono_class_get_parent (MonoClass *klass)
{
        return klass->parent;
}

/**
 * mono_class_get_nesting_type;
 * @klass: the MonoClass to act on
 *
 * Returns: the container type where this type is nested or NULL if this type is not a nested type.
 */
MonoClass*
mono_class_get_nesting_type (MonoClass *klass)
{
        return klass->nested_in;
}

/**
 * mono_class_get_rank:
 * @klass: the MonoClass to act on
 *
 * Returns: the rank for the array (the number of dimensions).
 */
int
mono_class_get_rank (MonoClass *klass)
{
        return klass->rank;
}

/**
 * mono_class_get_flags:
 * @klass: the MonoClass to act on
 *
 * The type flags from the TypeDef table from the metadata.
 * see the TYPE_ATTRIBUTE_* definitions on tabledefs.h for the
 * different values.
 *
 * Returns: the flags from the TypeDef table.
 */
guint32
mono_class_get_flags (MonoClass *klass)
{
        return klass->flags;
}

/**
 * mono_class_get_name
 * @klass: the MonoClass to act on
 *
 * Returns: the name of the class.
 */
const char*
mono_class_get_name (MonoClass *klass)
{
        return klass->name;
}

/**
 * mono_class_get_namespace:
 * @klass: the MonoClass to act on
 *
 * Returns: the namespace of the class.
 */
const char*
mono_class_get_namespace (MonoClass *klass)
{
        return klass->name_space;
}

/**
 * mono_class_get_type:
 * @klass: the MonoClass to act on
 *
 * This method returns the internal Type representation for the class.
 *
 * Returns: the MonoType from the class.
 */
MonoType*
mono_class_get_type (MonoClass *klass)
{
        return &klass->byval_arg;
}

/**
 * mono_class_get_type_token
 * @klass: the MonoClass to act on
 *
 * This method returns type token for the class.
 *
 * Returns: the type token for the class.
 */
guint32
mono_class_get_type_token (MonoClass *klass)
{
  return klass->type_token;
}

/**
 * mono_class_get_byref_type:
 * @klass: the MonoClass to act on
 *
 * 
 */
MonoType*
mono_class_get_byref_type (MonoClass *klass)
{
        return &klass->this_arg;
}

/**
 * mono_class_num_fields:
 * @klass: the MonoClass to act on
 *
 * Returns: the number of static and instance fields in the class.
 */
int
mono_class_num_fields (MonoClass *klass)
{
        return klass->field.count;
}

/**
 * mono_class_num_methods:
 * @klass: the MonoClass to act on
 *
 * Returns: the number of methods in the class.
 */
int
mono_class_num_methods (MonoClass *klass)
{
        return klass->method.count;
}

/**
 * mono_class_num_properties
 * @klass: the MonoClass to act on
 *
 * Returns: the number of properties in the class.
 */
int
mono_class_num_properties (MonoClass *klass)
{
        mono_class_setup_properties (klass);

        return klass->ext->property.count;
}

/**
 * mono_class_num_events:
 * @klass: the MonoClass to act on
 *
 * Returns: the number of events in the class.
 */
int
mono_class_num_events (MonoClass *klass)
{
        mono_class_setup_events (klass);

        return klass->ext->event.count;
}

/**
 * mono_class_get_fields:
 * @klass: the MonoClass to act on
 *
 * This routine is an iterator routine for retrieving the fields in a class.
 *
 * You must pass a gpointer that points to zero and is treated as an opaque handle to
 * iterate over all of the elements.  When no more values are
 * available, the return value is NULL.
 *
 * Returns: a @MonoClassField* on each iteration, or NULL when no more fields are available.
 */
MonoClassField*
mono_class_get_fields (MonoClass* klass, gpointer *iter)
{
        MonoClassField* field;
        if (!iter)
                return NULL;
        if (!*iter) {
                mono_class_setup_fields_locking (klass);
                if (klass->exception_type)
                        return NULL;
                /* start from the first */
                if (klass->field.count) {
                        return *iter = &klass->fields [0];
                } else {
                        /* no fields */
                        return NULL;
                }
        }
        field = *iter;
        field++;
        if (field < &klass->fields [klass->field.count]) {
                return *iter = field;
        }
        return NULL;
}

/**
 * mono_class_get_methods
 * @klass: the MonoClass to act on
 *
 * This routine is an iterator routine for retrieving the fields in a class.
 *
 * You must pass a gpointer that points to zero and is treated as an opaque handle to
 * iterate over all of the elements.  When no more values are
 * available, the return value is NULL.
 *
 * Returns: a MonoMethod on each iteration or NULL when no more methods are available.
 */
MonoMethod*
mono_class_get_methods (MonoClass* klass, gpointer *iter)
{
        MonoMethod** method;
        if (!iter)
                return NULL;
        if (!klass->inited)
                mono_class_init (klass);
        if (!*iter) {
                mono_class_setup_methods (klass);

                /*
                 * We can't fail lookup of methods otherwise the runtime will burst in flames on all sort of places.
                 * FIXME we should better report this error to the caller
                 */
                if (!klass->methods)
                        return NULL;
                /* start from the first */
                if (klass->method.count) {
                        *iter = &klass->methods [0];
                        return klass->methods [0];
                } else {
                        /* no method */
                        return NULL;
                }
        }
        method = *iter;
        method++;
        if (method < &klass->methods [klass->method.count]) {
                *iter = method;
                return *method;
        }
        return NULL;
}

/*
 * mono_class_get_virtual_methods:
 *
 *   Iterate over the virtual methods of KLASS.
 *
 * LOCKING: Assumes the loader lock is held (because of the klass->methods check).
 */
static MonoMethod*
mono_class_get_virtual_methods (MonoClass* klass, gpointer *iter)
{
        MonoMethod** method;
        if (!iter)
                return NULL;
        if (klass->methods || !MONO_CLASS_HAS_STATIC_METADATA (klass) || mono_debug_using_mono_debugger ()) {
                if (!*iter) {
                        mono_class_setup_methods (klass);
                        /*
                         * We can't fail lookup of methods otherwise the runtime will burst in flames on all sort of places.
                         * FIXME we should better report this error to the caller
                         */
                        if (!klass->methods)
                                return NULL;
                        /* start from the first */
                        method = &klass->methods [0];
                } else {
                        method = *iter;
                        method++;
                }
                while (method < &klass->methods [klass->method.count]) {
                        if (((*method)->flags & METHOD_ATTRIBUTE_VIRTUAL))
                                break;
                        method ++;
                }
                if (method < &klass->methods [klass->method.count]) {
                        *iter = method;
                        return *method;
                } else {
                        return NULL;
                }
        } else {
                /* Search directly in metadata to avoid calling setup_methods () */
                MonoMethod *res = NULL;
                int i, start_index;

                if (!*iter) {
                        start_index = 0;
                } else {
                        start_index = GPOINTER_TO_UINT (*iter);
                }

                for (i = start_index; i < klass->method.count; ++i) {
                        guint32 flags;

                        /* class->method.first points into the methodptr table */
                        flags = mono_metadata_decode_table_row_col (klass->image, MONO_TABLE_METHOD, klass->method.first + i, MONO_METHOD_FLAGS);

                        if (flags & METHOD_ATTRIBUTE_VIRTUAL)
                                break;
                }

                if (i < klass->method.count) {
                        res = mono_get_method (klass->image, MONO_TOKEN_METHOD_DEF | (klass->method.first + i + 1), klass);
                        /* Add 1 here so the if (*iter) check fails */
                        *iter = GUINT_TO_POINTER (i + 1);
                        return res;
                } else {
                        return NULL;
                }
        }
}

/**
 * mono_class_get_properties:
 * @klass: the MonoClass to act on
 *
 * This routine is an iterator routine for retrieving the properties in a class.
 *
 * You must pass a gpointer that points to zero and is treated as an opaque handle to
 * iterate over all of the elements.  When no more values are
 * available, the return value is NULL.
 *
 * Returns: a @MonoProperty* on each invocation, or NULL when no more are available.
 */
MonoProperty*
mono_class_get_properties (MonoClass* klass, gpointer *iter)
{
        MonoProperty* property;
        if (!iter)
                return NULL;
        if (!klass->inited)
                mono_class_init (klass);
        if (!*iter) {
                mono_class_setup_properties (klass);
                /* start from the first */
                if (klass->ext->property.count) {
                        return *iter = &klass->ext->properties [0];
                } else {
                        /* no fields */
                        return NULL;
                }
        }
        property = *iter;
        property++;
        if (property < &klass->ext->properties [klass->ext->property.count]) {
                return *iter = property;
        }
        return NULL;
}

/**
 * mono_class_get_events:
 * @klass: the MonoClass to act on
 *
 * This routine is an iterator routine for retrieving the properties in a class.
 *
 * You must pass a gpointer that points to zero and is treated as an opaque handle to
 * iterate over all of the elements.  When no more values are
 * available, the return value is NULL.
 *
 * Returns: a @MonoEvent* on each invocation, or NULL when no more are available.
 */
MonoEvent*
mono_class_get_events (MonoClass* klass, gpointer *iter)
{
        MonoEvent* event;
        if (!iter)
                return NULL;
        if (!klass->inited)
                mono_class_init (klass);
        if (!*iter) {
                mono_class_setup_events (klass);
                /* start from the first */
                if (klass->ext->event.count) {
                        return *iter = &klass->ext->events [0];
                } else {
                        /* no fields */
                        return NULL;
                }
        }
        event = *iter;
        event++;
        if (event < &klass->ext->events [klass->ext->event.count]) {
                return *iter = event;
        }
        return NULL;
}

/**
 * mono_class_get_interfaces
 * @klass: the MonoClass to act on
 *
 * This routine is an iterator routine for retrieving the interfaces implemented by this class.
 *
 * You must pass a gpointer that points to zero and is treated as an opaque handle to
 * iterate over all of the elements.  When no more values are
 * available, the return value is NULL.
 *
 * Returns: a @Monoclass* on each invocation, or NULL when no more are available.
 */
MonoClass*
mono_class_get_interfaces (MonoClass* klass, gpointer *iter)
{
        MonoError error;
        MonoClass** iface;
        if (!iter)
                return NULL;
        if (!*iter) {
                if (!klass->inited)
                        mono_class_init (klass);
                if (!klass->interfaces_inited) {
                        mono_class_setup_interfaces (klass, &error);
                        if (!mono_error_ok (&error)) {
                                mono_error_cleanup (&error);
                                return NULL;
                        }
                }
                /* start from the first */
                if (klass->interface_count) {
                        *iter = &klass->interfaces [0];
                        return klass->interfaces [0];
                } else {
                        /* no interface */
                        return NULL;
                }
        }
        iface = *iter;
        iface++;
        if (iface < &klass->interfaces [klass->interface_count]) {
                *iter = iface;
                return *iface;
        }
        return NULL;
}

/**
 * mono_class_get_nested_types
 * @klass: the MonoClass to act on
 *
 * This routine is an iterator routine for retrieving the nested types of a class.
 * This works only if @klass is non-generic, or a generic type definition.
 *
 * You must pass a gpointer that points to zero and is treated as an opaque handle to
 * iterate over all of the elements.  When no more values are
 * available, the return value is NULL.
 *
 * Returns: a @Monoclass* on each invocation, or NULL when no more are available.
 */
MonoClass*
mono_class_get_nested_types (MonoClass* klass, gpointer *iter)
{
        GList *item;
        int i;

        if (!iter)
                return NULL;
        if (!klass->inited)
                mono_class_init (klass);
        if (!klass->nested_classes_inited) {
                if (!klass->type_token)
                        klass->nested_classes_inited = TRUE;
                mono_loader_lock ();
                if (!klass->nested_classes_inited) {
                        i = mono_metadata_nesting_typedef (klass->image, klass->type_token, 1);
                        while (i) {
                                MonoClass* nclass;
                                guint32 cols [MONO_NESTED_CLASS_SIZE];
                                mono_metadata_decode_row (&klass->image->tables [MONO_TABLE_NESTEDCLASS], i - 1, cols, MONO_NESTED_CLASS_SIZE);
                                nclass = mono_class_create_from_typedef (klass->image, MONO_TOKEN_TYPE_DEF | cols [MONO_NESTED_CLASS_NESTED]);
                                if (!nclass)
                                        continue;
                                mono_class_alloc_ext (klass);
                                klass->ext->nested_classes = g_list_prepend_image (klass->image, klass->ext->nested_classes, nclass);

                                i = mono_metadata_nesting_typedef (klass->image, klass->type_token, i + 1);
                        }
                }
                mono_memory_barrier ();
                klass->nested_classes_inited = TRUE;
                mono_loader_unlock ();
        }

        if (!*iter) {
                /* start from the first */
                if (klass->ext && klass->ext->nested_classes) {
                        *iter = klass->ext->nested_classes;
                        return klass->ext->nested_classes->data;
                } else {
                        /* no nested types */
                        return NULL;
                }
        }
        item = *iter;
        item = item->next;
        if (item) {
                *iter = item;
                return item->data;
        }
        return NULL;
}

/**
 * mono_field_get_name:
 * @field: the MonoClassField to act on
 *
 * Returns: the name of the field.
 */
const char*
mono_field_get_name (MonoClassField *field)
{
        return field->name;
}

/**
 * mono_field_get_type:
 * @field: the MonoClassField to act on
 *
 * Returns: MonoType of the field.
 */
MonoType*
mono_field_get_type (MonoClassField *field)
{
        return field->type;
}

/**
 * mono_field_get_parent:
 * @field: the MonoClassField to act on
 *
 * Returns: MonoClass where the field was defined.
 */
MonoClass*
mono_field_get_parent (MonoClassField *field)
{
        return field->parent;
}

/**
 * mono_field_get_flags;
 * @field: the MonoClassField to act on
 *
 * The metadata flags for a field are encoded using the
 * FIELD_ATTRIBUTE_* constants.  See the tabledefs.h file for details.
 *
 * Returns: the flags for the field.
 */
guint32
mono_field_get_flags (MonoClassField *field)
{
        return field->type->attrs;
}

/**
 * mono_field_get_offset;
 * @field: the MonoClassField to act on
 *
 * Returns: the field offset.
 */
guint32
mono_field_get_offset (MonoClassField *field)
{
        return field->offset;
}

static const char *
mono_field_get_rva (MonoClassField *field)
{
        guint32 rva;
        int field_index;
        MonoClass *klass = field->parent;

        g_assert (field->type->attrs & FIELD_ATTRIBUTE_HAS_FIELD_RVA);

        if (!klass->ext || !klass->ext->field_def_values) {
                mono_loader_lock ();
                mono_class_alloc_ext (klass);
                if (!klass->ext->field_def_values)
                        klass->ext->field_def_values = mono_class_alloc0 (klass, sizeof (MonoFieldDefaultValue) * klass->field.count);
                mono_loader_unlock ();
        }

        field_index = mono_field_get_index (field);
                
        if (!klass->ext->field_def_values [field_index].data && !klass->image->dynamic) {
                mono_metadata_field_info (field->parent->image, klass->field.first + field_index, NULL, &rva, NULL);
                if (!rva)
                        g_warning ("field %s in %s should have RVA data, but hasn't", mono_field_get_name (field), field->parent->name);
                klass->ext->field_def_values [field_index].data = mono_image_rva_map (field->parent->image, rva);
        }

        return klass->ext->field_def_values [field_index].data;
}

/**
 * mono_field_get_data;
 * @field: the MonoClassField to act on
 *
 * Returns: pointer to the metadata constant value or to the field
 * data if it has an RVA flag.
 */
const char *
mono_field_get_data (MonoClassField *field)
{
        if (field->type->attrs & FIELD_ATTRIBUTE_HAS_DEFAULT) {
                MonoTypeEnum def_type;

                return mono_class_get_field_default_value (field, &def_type);
        } else if (field->type->attrs & FIELD_ATTRIBUTE_HAS_FIELD_RVA) {
                return mono_field_get_rva (field);
        } else {
                return NULL;
        }
}

/**
 * mono_property_get_name: 
 * @prop: the MonoProperty to act on
 *
 * Returns: the name of the property
 */
const char*
mono_property_get_name (MonoProperty *prop)
{
        return prop->name;
}

/**
 * mono_property_get_set_method
 * @prop: the MonoProperty to act on.
 *
 * Returns: the setter method of the property (A MonoMethod)
 */
MonoMethod*
mono_property_get_set_method (MonoProperty *prop)
{
        return prop->set;
}

/**
 * mono_property_get_get_method
 * @prop: the MonoProperty to act on.
 *
 * Returns: the setter method of the property (A MonoMethod)
 */
MonoMethod*
mono_property_get_get_method (MonoProperty *prop)
{
        return prop->get;
}

/**
 * mono_property_get_parent:
 * @prop: the MonoProperty to act on.
 *
 * Returns: the MonoClass where the property was defined.
 */
MonoClass*
mono_property_get_parent (MonoProperty *prop)
{
        return prop->parent;
}

/**
 * mono_property_get_flags:
 * @prop: the MonoProperty to act on.
 *
 * The metadata flags for a property are encoded using the
 * PROPERTY_ATTRIBUTE_* constants.  See the tabledefs.h file for details.
 *
 * Returns: the flags for the property.
 */
guint32
mono_property_get_flags (MonoProperty *prop)
{
        return prop->attrs;
}

/**
 * mono_event_get_name:
 * @event: the MonoEvent to act on
 *
 * Returns: the name of the event.
 */
const char*
mono_event_get_name (MonoEvent *event)
{
        return event->name;
}

/**
 * mono_event_get_add_method:
 * @event: The MonoEvent to act on.
 *
 * Returns: the @add' method for the event (a MonoMethod).
 */
MonoMethod*
mono_event_get_add_method (MonoEvent *event)
{
        return event->add;
}

/**
 * mono_event_get_remove_method:
 * @event: The MonoEvent to act on.
 *
 * Returns: the @remove method for the event (a MonoMethod).
 */
MonoMethod*
mono_event_get_remove_method (MonoEvent *event)
{
        return event->remove;
}

/**
 * mono_event_get_raise_method:
 * @event: The MonoEvent to act on.
 *
 * Returns: the @raise method for the event (a MonoMethod).
 */
MonoMethod*
mono_event_get_raise_method (MonoEvent *event)
{
        return event->raise;
}

/**
 * mono_event_get_parent:
 * @event: the MonoEvent to act on.
 *
 * Returns: the MonoClass where the event is defined.
 */
MonoClass*
mono_event_get_parent (MonoEvent *event)
{
        return event->parent;
}

/**
 * mono_event_get_flags
 * @event: the MonoEvent to act on.
 *
 * The metadata flags for an event are encoded using the
 * EVENT_* constants.  See the tabledefs.h file for details.
 *
 * Returns: the flags for the event.
 */
guint32
mono_event_get_flags (MonoEvent *event)
{
        return event->attrs;
}

/**
 * mono_class_get_method_from_name:
 * @klass: where to look for the method
 * @name_space: name of the method
 * @param_count: number of parameters. -1 for any number.
 *
 * Obtains a MonoMethod with a given name and number of parameters.
 * It only works if there are no multiple signatures for any given method name.
 */
MonoMethod *
mono_class_get_method_from_name (MonoClass *klass, const char *name, int param_count)
{
        return mono_class_get_method_from_name_flags (klass, name, param_count, 0);
}

static MonoMethod*
find_method_in_metadata (MonoClass *klass, const char *name, int param_count, int flags)
{
        MonoMethod *res = NULL;
        int i;

        /* Search directly in the metadata to avoid calling setup_methods () */
        for (i = 0; i < klass->method.count; ++i) {
                guint32 cols [MONO_METHOD_SIZE];
                MonoMethod *method;

                /* class->method.first points into the methodptr table */
                mono_metadata_decode_table_row (klass->image, MONO_TABLE_METHOD, klass->method.first + i, cols, MONO_METHOD_SIZE);

                if (!strcmp (mono_metadata_string_heap (klass->image, cols [MONO_METHOD_NAME]), name)) {
                        method = mono_get_method (klass->image, MONO_TOKEN_METHOD_DEF | (klass->method.first + i + 1), klass);
                        if ((param_count == -1) || mono_method_signature (method)->param_count == param_count) {
                                res = method;
                                break;
                        }
                }
        }

        return res;
}

/**
 * mono_class_get_method_from_name_flags:
 * @klass: where to look for the method
 * @name_space: name of the method
 * @param_count: number of parameters. -1 for any number.
 * @flags: flags which must be set in the method
 *
 * Obtains a MonoMethod with a given name and number of parameters.
 * It only works if there are no multiple signatures for any given method name.
 */
MonoMethod *
mono_class_get_method_from_name_flags (MonoClass *klass, const char *name, int param_count, int flags)
{
        MonoMethod *res = NULL;
        int i;

        mono_class_init (klass);

        if (klass->generic_class && !klass->methods) {
                res = mono_class_get_method_from_name_flags (klass->generic_class->container_class, name, param_count, flags);
                if (res)
                        res = mono_class_inflate_generic_method_full (res, klass, mono_class_get_context (klass));
                return res;
        }

        if (klass->methods || !MONO_CLASS_HAS_STATIC_METADATA (klass)) {
                mono_class_setup_methods (klass);
                /*
                We can't fail lookup of methods otherwise the runtime will burst in flames on all sort of places.
                See mono/tests/array_load_exception.il
                FIXME we should better report this error to the caller
                 */
                if (!klass->methods)
                        return NULL;
                for (i = 0; i < klass->method.count; ++i) {
                        MonoMethod *method = klass->methods [i];

                        if (method->name[0] == name [0] && 
                                !strcmp (name, method->name) &&
                                (param_count == -1 || mono_method_signature (method)->param_count == param_count) &&
                                ((method->flags & flags) == flags)) {
                                res = method;
                                break;
                        }
                }
        }
        else {
            res = find_method_in_metadata (klass, name, param_count, flags);
        }

        return res;
}

/**
 * mono_class_set_failure:
 * @klass: class in which the failure was detected
 * @ex_type: the kind of exception/error to be thrown (later)
 * @ex_data: exception data (specific to each type of exception/error)
 *
 * Keep a detected failure informations in the class for later processing.
 * Note that only the first failure is kept.
 *
 * LOCKING: Acquires the loader lock.
 */
gboolean
mono_class_set_failure (MonoClass *klass, guint32 ex_type, void *ex_data)
{
        if (klass->exception_type)
                return FALSE;

        mono_loader_lock ();
        klass->exception_type = ex_type;
        if (ex_data)
                mono_image_property_insert (klass->image, klass, MONO_CLASS_PROP_EXCEPTION_DATA, ex_data);
        mono_loader_unlock ();

        return TRUE;
}

/*
 * mono_class_get_exception_data:
 *
 *   Return the exception_data property of KLASS.
 *
 * LOCKING: Acquires the loader lock.
 */
gpointer
mono_class_get_exception_data (MonoClass *klass)
{
        return mono_image_property_lookup (klass->image, klass, MONO_CLASS_PROP_EXCEPTION_DATA);
}

/**
 * mono_classes_init:
 *
 * Initialize the resources used by this module.
 */
void
mono_classes_init (void)
{
        mono_counters_register ("Inflated methods size",
                                                        MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &inflated_methods_size);
        mono_counters_register ("Inflated classes",
                                                        MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &inflated_classes);
        mono_counters_register ("Inflated classes size",
                                                        MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &inflated_classes_size);
        mono_counters_register ("MonoClass size",
                                                        MONO_COUNTER_METADATA | MONO_COUNTER_INT, &classes_size);
        mono_counters_register ("MonoClassExt size",
                                                        MONO_COUNTER_METADATA | MONO_COUNTER_INT, &class_ext_size);
}

/**
 * mono_classes_cleanup:
 *
 * Free the resources used by this module.
 */
void
mono_classes_cleanup (void)
{
        if (global_interface_bitset)
                mono_bitset_free (global_interface_bitset);
}

/**
 * mono_class_get_exception_for_failure:
 * @klass: class in which the failure was detected
 *
 * Return a constructed MonoException than the caller can then throw
 * using mono_raise_exception - or NULL if no failure is present (or
 * doesn't result in an exception).
 */
MonoException*
mono_class_get_exception_for_failure (MonoClass *klass)
{
        gpointer exception_data = mono_class_get_exception_data (klass);

        switch (klass->exception_type) {
        case MONO_EXCEPTION_SECURITY_INHERITANCEDEMAND: {
                MonoDomain *domain = mono_domain_get ();
                MonoSecurityManager* secman = mono_security_manager_get_methods ();
                MonoMethod *method = exception_data;
                guint32 error = (method) ? MONO_METADATA_INHERITANCEDEMAND_METHOD : MONO_METADATA_INHERITANCEDEMAND_CLASS;
                MonoObject *exc = NULL;
                gpointer args [4];

                args [0] = &error;
                args [1] = mono_assembly_get_object (domain, mono_image_get_assembly (klass->image));
                args [2] = mono_type_get_object (domain, &klass->byval_arg);
                args [3] = (method) ? mono_method_get_object (domain, method, NULL) : NULL;

                mono_runtime_invoke (secman->inheritsecurityexception, NULL, args, &exc);
                return (MonoException*) exc;
        }
        case MONO_EXCEPTION_TYPE_LOAD: {
                MonoString *name;
                MonoException *ex;
                char *str = mono_type_get_full_name (klass);
                char *astr = klass->image->assembly? mono_stringify_assembly_name (&klass->image->assembly->aname): NULL;
                name = mono_string_new (mono_domain_get (), str);
                g_free (str);
                ex = mono_get_exception_type_load (name, astr);
                g_free (astr);
                return ex;
        }
        case MONO_EXCEPTION_MISSING_METHOD: {
                char *class_name = exception_data;
                char *assembly_name = class_name + strlen (class_name) + 1;

                return mono_get_exception_missing_method (class_name, assembly_name);
        }
        case MONO_EXCEPTION_MISSING_FIELD: {
                char *class_name = exception_data;
                char *member_name = class_name + strlen (class_name) + 1;

                return mono_get_exception_missing_field (class_name, member_name);
        }
        case MONO_EXCEPTION_FILE_NOT_FOUND: {
                char *msg_format = exception_data;
                char *assembly_name = msg_format + strlen (msg_format) + 1;
                char *msg = g_strdup_printf (msg_format, assembly_name);
                MonoException *ex;

                ex = mono_get_exception_file_not_found2 (msg, mono_string_new (mono_domain_get (), assembly_name));

                g_free (msg);

                return ex;
        }
        case MONO_EXCEPTION_BAD_IMAGE: {
                return mono_get_exception_bad_image_format (exception_data);
        }
        default: {
                MonoLoaderError *error;
                MonoException *ex;
                
                error = mono_loader_get_last_error ();
                if (error != NULL){
                        ex = mono_loader_error_prepare_exception (error);
                        return ex;
                }
                
                /* TODO - handle other class related failures */
                return NULL;
        }
        }
}

static gboolean
is_nesting_type (MonoClass *outer_klass, MonoClass *inner_klass)
 {
        outer_klass = mono_class_get_generic_type_definition (outer_klass);
        inner_klass = mono_class_get_generic_type_definition (inner_klass);
        do {
                if (outer_klass == inner_klass)
                        return TRUE;
                inner_klass = inner_klass->nested_in;
        } while (inner_klass);
        return FALSE;
}

MonoClass *
mono_class_get_generic_type_definition (MonoClass *klass)
{
        return klass->generic_class ? klass->generic_class->container_class : klass;
}

/*
 * Check if @klass is a subtype of @parent ignoring generic instantiations.
 * 
 * Generic instantiations are ignored for all super types of @klass.
 * 
 * Visibility checks ignoring generic instantiations.  
 */
gboolean
mono_class_has_parent_and_ignore_generics (MonoClass *klass, MonoClass *parent)
{
        int i;
        klass = mono_class_get_generic_type_definition (klass);
        parent = mono_class_get_generic_type_definition (parent);
        
        for (i = 0; i < klass->idepth; ++i) {
                if (parent == mono_class_get_generic_type_definition (klass->supertypes [i]))
                        return TRUE;
        }
        return FALSE;
}
/*
 * Subtype can only access parent members with family protection if the site object
 * is subclass of Subtype. For example:
 * class A { protected int x; }
 * class B : A {
 *      void valid_access () {
 *              B b;
 *              b.x = 0;
 *  }
 *  void invalid_access () {
 *              A a;
 *              a.x = 0;
 *  }
 * }
 * */
static gboolean
is_valid_family_access (MonoClass *access_klass, MonoClass *member_klass, MonoClass *context_klass)
{
        if (!mono_class_has_parent_and_ignore_generics (access_klass, member_klass))
                return FALSE;

        if (context_klass == NULL)
                return TRUE;
        /*if access_klass is not member_klass context_klass must be type compat*/
        if (access_klass != member_klass && !mono_class_has_parent_and_ignore_generics (context_klass, access_klass))
                return FALSE;
        return TRUE;
}

static gboolean
can_access_internals (MonoAssembly *accessing, MonoAssembly* accessed)
{
        GSList *tmp;
        if (accessing == accessed)
                return TRUE;
        if (!accessed || !accessing)
                return FALSE;

        /* extra safety under CoreCLR - the runtime does not verify the strongname signatures
         * anywhere so untrusted friends are not safe to access platform's code internals */
        if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR) {
                if (!mono_security_core_clr_can_access_internals (accessing->image, accessed->image))
                        return FALSE;
        }

        mono_assembly_load_friends (accessed);
        for (tmp = accessed->friend_assembly_names; tmp; tmp = tmp->next) {
                MonoAssemblyName *friend = tmp->data;
                /* Be conservative with checks */
                if (!friend->name)
                        continue;
                if (strcmp (accessing->aname.name, friend->name))
                        continue;
                if (friend->public_key_token [0]) {
                        if (!accessing->aname.public_key_token [0])
                                continue;
                        if (!mono_public_tokens_are_equal (friend->public_key_token, accessing->aname.public_key_token))
                                continue;
                }
                return TRUE;
        }
        return FALSE;
}

/*
 * If klass is a generic type or if it is derived from a generic type, return the
 * MonoClass of the generic definition
 * Returns NULL if not found
 */
static MonoClass*
get_generic_definition_class (MonoClass *klass)
{
        while (klass) {
                if (klass->generic_class && klass->generic_class->container_class)
                        return klass->generic_class->container_class;
                klass = klass->parent;
        }
        return NULL;
}

static gboolean
can_access_instantiation (MonoClass *access_klass, MonoGenericInst *ginst)
{
        int i;
        for (i = 0; i < ginst->type_argc; ++i) {
                MonoType *type = ginst->type_argv[i];
                switch (type->type) {
                case MONO_TYPE_SZARRAY:
                        if (!can_access_type (access_klass, type->data.klass))
                                return FALSE;
                        break;
                case MONO_TYPE_ARRAY:
                        if (!can_access_type (access_klass, type->data.array->eklass))
                                return FALSE;
                        break;
                case MONO_TYPE_PTR:
                        if (!can_access_type (access_klass, mono_class_from_mono_type (type->data.type)))
                                return FALSE;
                        break;
                case MONO_TYPE_CLASS:
                case MONO_TYPE_VALUETYPE:
                case MONO_TYPE_GENERICINST:
                        if (!can_access_type (access_klass, mono_class_from_mono_type (type)))
                                return FALSE;
                }
        }
        return TRUE;
}

static gboolean
can_access_type (MonoClass *access_klass, MonoClass *member_klass)
{
        int access_level;

        if (access_klass->element_class && !access_klass->enumtype)
                access_klass = access_klass->element_class;

        if (member_klass->element_class && !member_klass->enumtype)
                member_klass = member_klass->element_class;

        access_level = member_klass->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK;

        if (member_klass->byval_arg.type == MONO_TYPE_VAR || member_klass->byval_arg.type == MONO_TYPE_MVAR)
                return TRUE;

        if (member_klass->generic_class && !can_access_instantiation (access_klass, member_klass->generic_class->context.class_inst))
                return FALSE;

        if (is_nesting_type (access_klass, member_klass) || (access_klass->nested_in && is_nesting_type (access_klass->nested_in, member_klass)))
                return TRUE;

        if (member_klass->nested_in && !can_access_type (access_klass, member_klass->nested_in))
                return FALSE;

        /*Non nested type with nested visibility. We just fail it.*/
        if (access_level >= TYPE_ATTRIBUTE_NESTED_PRIVATE && access_level <= TYPE_ATTRIBUTE_NESTED_FAM_OR_ASSEM && member_klass->nested_in == NULL)
                return FALSE;

        switch (access_level) {
        case TYPE_ATTRIBUTE_NOT_PUBLIC:
                return can_access_internals (access_klass->image->assembly, member_klass->image->assembly);

        case TYPE_ATTRIBUTE_PUBLIC:
                return TRUE;

        case TYPE_ATTRIBUTE_NESTED_PUBLIC:
                return TRUE;

        case TYPE_ATTRIBUTE_NESTED_PRIVATE:
                return is_nesting_type (member_klass, access_klass);

        case TYPE_ATTRIBUTE_NESTED_FAMILY:
                return mono_class_has_parent_and_ignore_generics (access_klass, member_klass->nested_in); 

        case TYPE_ATTRIBUTE_NESTED_ASSEMBLY:
                return can_access_internals (access_klass->image->assembly, member_klass->image->assembly);

        case TYPE_ATTRIBUTE_NESTED_FAM_AND_ASSEM:
                return can_access_internals (access_klass->image->assembly, member_klass->nested_in->image->assembly) &&
                        mono_class_has_parent_and_ignore_generics (access_klass, member_klass->nested_in);

        case TYPE_ATTRIBUTE_NESTED_FAM_OR_ASSEM:
                return can_access_internals (access_klass->image->assembly, member_klass->nested_in->image->assembly) ||
                        mono_class_has_parent_and_ignore_generics (access_klass, member_klass->nested_in);
        }
        return FALSE;
}

/* FIXME: check visibility of type, too */
static gboolean
can_access_member (MonoClass *access_klass, MonoClass *member_klass, MonoClass* context_klass, int access_level)
{
        MonoClass *member_generic_def;
        if (((access_klass->generic_class && access_klass->generic_class->container_class) ||
                                        access_klass->generic_container) && 
                        (member_generic_def = get_generic_definition_class (member_klass))) {
                MonoClass *access_container;

                if (access_klass->generic_container)
                        access_container = access_klass;
                else
                        access_container = access_klass->generic_class->container_class;

                if (can_access_member (access_container, member_generic_def, context_klass, access_level))
                        return TRUE;
        }

        /* Partition I 8.5.3.2 */
        /* the access level values are the same for fields and methods */
        switch (access_level) {
        case FIELD_ATTRIBUTE_COMPILER_CONTROLLED:
                /* same compilation unit */
                return access_klass->image == member_klass->image;
        case FIELD_ATTRIBUTE_PRIVATE:
                return access_klass == member_klass;
        case FIELD_ATTRIBUTE_FAM_AND_ASSEM:
                if (is_valid_family_access (access_klass, member_klass, context_klass) &&
                    can_access_internals (access_klass->image->assembly, member_klass->image->assembly))
                        return TRUE;
                return FALSE;
        case FIELD_ATTRIBUTE_ASSEMBLY:
                return can_access_internals (access_klass->image->assembly, member_klass->image->assembly);
        case FIELD_ATTRIBUTE_FAMILY:
                if (is_valid_family_access (access_klass, member_klass, context_klass))
                        return TRUE;
                return FALSE;
        case FIELD_ATTRIBUTE_FAM_OR_ASSEM:
                if (is_valid_family_access (access_klass, member_klass, context_klass))
                        return TRUE;
                return can_access_internals (access_klass->image->assembly, member_klass->image->assembly);
        case FIELD_ATTRIBUTE_PUBLIC:
                return TRUE;
        }
        return FALSE;
}

gboolean
mono_method_can_access_field (MonoMethod *method, MonoClassField *field)
{
        /* FIXME: check all overlapping fields */
        int can = can_access_member (method->klass, field->parent, NULL, field->type->attrs & FIELD_ATTRIBUTE_FIELD_ACCESS_MASK);
        if (!can) {
                MonoClass *nested = method->klass->nested_in;
                while (nested) {
                        can = can_access_member (nested, field->parent, NULL, field->type->attrs & FIELD_ATTRIBUTE_FIELD_ACCESS_MASK);
                        if (can)
                                return TRUE;
                        nested = nested->nested_in;
                }
        }
        return can;
}

gboolean
mono_method_can_access_method (MonoMethod *method, MonoMethod *called)
{
        int can = can_access_member (method->klass, called->klass, NULL, called->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK);
        if (!can) {
                MonoClass *nested = method->klass->nested_in;
                while (nested) {
                        can = can_access_member (nested, called->klass, NULL, called->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK);
                        if (can)
                                return TRUE;
                        nested = nested->nested_in;
                }
        }
        /* 
         * FIXME:
         * with generics calls to explicit interface implementations can be expressed
         * directly: the method is private, but we must allow it. This may be opening
         * a hole or the generics code should handle this differently.
         * Maybe just ensure the interface type is public.
         */
        if ((called->flags & METHOD_ATTRIBUTE_VIRTUAL) && (called->flags & METHOD_ATTRIBUTE_FINAL))
                return TRUE;
        return can;
}

/*
 * mono_method_can_access_method_full:
 * @method: The caller method 
 * @called: The called method 
 * @context_klass: The static type on stack of the owner @called object used
 * 
 * This function must be used with instance calls, as they have more strict family accessibility.
 * It can be used with static methods, but context_klass should be NULL.
 * 
 * Returns: TRUE if caller have proper visibility and acessibility to @called
 */
gboolean
mono_method_can_access_method_full (MonoMethod *method, MonoMethod *called, MonoClass *context_klass)
{
        MonoClass *access_class = method->klass;
        MonoClass *member_class = called->klass;
        int can = can_access_member (access_class, member_class, context_klass, called->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK);
        if (!can) {
                MonoClass *nested = access_class->nested_in;
                while (nested) {
                        can = can_access_member (nested, member_class, context_klass, called->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK);
                        if (can)
                                break;
                        nested = nested->nested_in;
                }
        }

        if (!can)
                return FALSE;

        if (!can_access_type (access_class, member_class) && (!access_class->nested_in || !can_access_type (access_class->nested_in, member_class)))
                return FALSE;

        if (called->is_inflated) {
                MonoMethodInflated * infl = (MonoMethodInflated*)called;
                if (infl->context.method_inst && !can_access_instantiation (access_class, infl->context.method_inst))
                        return FALSE;
        }
                
        return TRUE;
}


/*
 * mono_method_can_access_field_full:
 * @method: The caller method 
 * @field: The accessed field
 * @context_klass: The static type on stack of the owner @field object used
 * 
 * This function must be used with instance fields, as they have more strict family accessibility.
 * It can be used with static fields, but context_klass should be NULL.
 * 
 * Returns: TRUE if caller have proper visibility and acessibility to @field
 */
gboolean
mono_method_can_access_field_full (MonoMethod *method, MonoClassField *field, MonoClass *context_klass)
{
        MonoClass *access_class = method->klass;
        MonoClass *member_class = field->parent;
        /* FIXME: check all overlapping fields */
        int can = can_access_member (access_class, member_class, context_klass, field->type->attrs & FIELD_ATTRIBUTE_FIELD_ACCESS_MASK);
        if (!can) {
                MonoClass *nested = access_class->nested_in;
                while (nested) {
                        can = can_access_member (nested, member_class, context_klass, field->type->attrs & FIELD_ATTRIBUTE_FIELD_ACCESS_MASK);
                        if (can)
                                break;
                        nested = nested->nested_in;
                }
        }

        if (!can)
                return FALSE;

        if (!can_access_type (access_class, member_class) && (!access_class->nested_in || !can_access_type (access_class->nested_in, member_class)))
                return FALSE;
        return TRUE;
}

/**
 * mono_type_is_valid_enum_basetype:
 * @type: The MonoType to check
 *
 * Returns: TRUE if the type can be used as the basetype of an enum
 */
gboolean mono_type_is_valid_enum_basetype (MonoType * type) {
        switch (type->type) {
        case MONO_TYPE_I1:
        case MONO_TYPE_U1:
        case MONO_TYPE_BOOLEAN:
        case MONO_TYPE_I2:
        case MONO_TYPE_U2:
        case MONO_TYPE_CHAR:
        case MONO_TYPE_I4:
        case MONO_TYPE_U4:
        case MONO_TYPE_I8:
        case MONO_TYPE_U8:
        case MONO_TYPE_I:
        case MONO_TYPE_U:
                return TRUE;
        }
        return FALSE;
}

/**
 * mono_class_is_valid_enum:
 * @klass: An enum class to be validated
 *
 * This method verify the required properties an enum should have.
 *  
 * Returns: TRUE if the informed enum class is valid 
 *
 * FIXME: TypeBuilder enums are allowed to implement interfaces, but since they cannot have methods, only empty interfaces are possible
 * FIXME: enum types are not allowed to have a cctor, but mono_reflection_create_runtime_class sets has_cctor to 1 for all types
 * FIXME: TypeBuilder enums can have any kind of static fields, but the spec is very explicit about that (P II 14.3)
 */
gboolean mono_class_is_valid_enum (MonoClass *klass) {
        MonoClassField * field;
        gpointer iter = NULL;
        gboolean found_base_field = FALSE;

        g_assert (klass->enumtype);
        /* we cannot test against mono_defaults.enum_class, or mcs won't be able to compile the System namespace*/
        if (!klass->parent || strcmp (klass->parent->name, "Enum") || strcmp (klass->parent->name_space, "System") ) {
                return FALSE;
        }

        if ((klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) != TYPE_ATTRIBUTE_AUTO_LAYOUT)
                return FALSE;

        while ((field = mono_class_get_fields (klass, &iter))) {
                if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
                        if (found_base_field)
                                return FALSE;
                        found_base_field = TRUE;
                        if (!mono_type_is_valid_enum_basetype (field->type))
                                return FALSE;
                }
        }

        if (!found_base_field)
                return FALSE;

        if (klass->method.count > 0) 
                return FALSE;

        return TRUE;
}

gboolean
mono_generic_class_is_generic_type_definition (MonoGenericClass *gklass)
{
        return gklass->context.class_inst == gklass->container_class->generic_container->context.class_inst;
}

/*
 * mono_class_setup_interface_id:
 *
 * Initializes MonoClass::interface_id if required.
 *
 * LOCKING: Acquires the loader lock.
 */
void
mono_class_setup_interface_id (MonoClass *class)
{
        mono_loader_lock ();
        if (MONO_CLASS_IS_INTERFACE (class) && !class->interface_id)
                class->interface_id = mono_get_unique_iid (class);
        mono_loader_unlock ();
}

/*
 * mono_class_alloc_ext:
 *
 *   Allocate klass->ext if not already done.
 * LOCKING: Assumes the loader lock is held.
 */
void
mono_class_alloc_ext (MonoClass *klass)
{
        if (!klass->ext) {
                klass->ext = mono_class_alloc0 (klass, sizeof (MonoClassExt));
                class_ext_size += sizeof (MonoClassExt);
        }
}

/*
 * mono_class_setup_interfaces:
 *
 *   Initialize class->interfaces/interfaces_count.
 * LOCKING: Acquires the loader lock.
 * This function can fail the type.
 */
void
mono_class_setup_interfaces (MonoClass *klass, MonoError *error)
{
        int i;

        mono_error_init (error);

        if (klass->interfaces_inited)
                return;

        mono_loader_lock ();

        if (klass->interfaces_inited) {
                mono_loader_unlock ();
                return;
        }

        if (klass->rank == 1 && klass->byval_arg.type != MONO_TYPE_ARRAY && mono_defaults.generic_ilist_class) {
                MonoType *args [1];

                /* generic IList, ICollection, IEnumerable */
                klass->interface_count = 1;
                klass->interfaces = mono_image_alloc0 (klass->image, sizeof (MonoClass*) * klass->interface_count);

                args [0] = &klass->element_class->byval_arg;
                klass->interfaces [0] = mono_class_bind_generic_parameters (
                        mono_defaults.generic_ilist_class, 1, args, FALSE);
        } else if (klass->generic_class) {
                MonoClass *gklass = klass->generic_class->container_class;

                klass->interface_count = gklass->interface_count;
                klass->interfaces = mono_class_new0 (klass, MonoClass *, klass->interface_count);
                for (i = 0; i < klass->interface_count; i++) {
                        klass->interfaces [i] = mono_class_inflate_generic_class_checked (gklass->interfaces [i], mono_generic_class_get_context (klass->generic_class), error);
                        if (!mono_error_ok (error)) {
                                mono_class_set_failure (klass, MONO_EXCEPTION_TYPE_LOAD, g_strdup ("Could not setup the interfaces"));
                                g_free (klass->interfaces);
                                klass->interfaces = NULL;
                                return;
                        }
                }
        }

        mono_memory_barrier ();

        klass->interfaces_inited = TRUE;

        mono_loader_unlock ();
}