5 * Mono Project (http://www.mono-project.com)
7 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
8 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
9 * Copyright 2011 Rodrigo Kumpera
10 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
14 #include <mono/metadata/object-internals.h>
15 #include <mono/metadata/dynamic-image-internals.h>
16 #include <mono/metadata/verify.h>
17 #include <mono/metadata/verify-internals.h>
18 #include <mono/metadata/opcodes.h>
19 #include <mono/metadata/tabledefs.h>
20 #include <mono/metadata/reflection.h>
21 #include <mono/metadata/debug-helpers.h>
22 #include <mono/metadata/mono-endian.h>
23 #include <mono/metadata/metadata.h>
24 #include <mono/metadata/metadata-internals.h>
25 #include <mono/metadata/class-internals.h>
26 #include <mono/metadata/security-manager.h>
27 #include <mono/metadata/security-core-clr.h>
28 #include <mono/metadata/tokentype.h>
29 #include <mono/metadata/mono-basic-block.h>
30 #include <mono/metadata/attrdefs.h>
31 #include <mono/utils/mono-counters.h>
32 #include <mono/utils/monobitset.h>
36 static MiniVerifierMode verifier_mode
= MONO_VERIFIER_MODE_OFF
;
37 static gboolean verify_all
= FALSE
;
40 * Set the desired level of checks for the verfier.
44 mono_verifier_set_mode (MiniVerifierMode mode
)
50 mono_verifier_enable_verify_all ()
55 #ifndef DISABLE_VERIFIER
57 * Pull the list of opcodes
59 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
63 #include "mono/cil/opcode.def"
68 #ifdef MONO_VERIFIER_DEBUG
69 #define VERIFIER_DEBUG(code) do { code } while (0)
71 #define VERIFIER_DEBUG(code)
74 //////////////////////////////////////////////////////////////////
75 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
76 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
77 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
78 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
79 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
80 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
82 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
83 vinfo->info.status = __status; \
84 vinfo->info.message = ( __msg ); \
85 vinfo->exception_type = (__exception); \
86 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
89 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
90 #define ADD_VERIFY_ERROR(__ctx, __msg) \
92 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
96 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
98 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
99 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
100 (__ctx)->verifiable = 0; \
101 if (IS_FAIL_FAST_MODE (__ctx)) \
102 (__ctx)->valid = 0; \
106 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
108 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
109 (__ctx)->valid = 0; \
112 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
114 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
115 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
116 (__ctx)->verifiable = 0; \
117 if (IS_FAIL_FAST_MODE (__ctx)) \
118 (__ctx)->valid = 0; \
122 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
123 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
125 #if SIZEOF_VOID_P == 4
126 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
128 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
131 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
132 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
134 /*Flags to be used with ILCodeDesc::flags */
136 /*Instruction has not been processed.*/
137 IL_CODE_FLAG_NOT_PROCESSED
= 0,
138 /*Instruction was decoded by mono_method_verify loop.*/
139 IL_CODE_FLAG_SEEN
= 1,
140 /*Instruction was target of a branch or is at a protected block boundary.*/
141 IL_CODE_FLAG_WAS_TARGET
= 2,
142 /*Used by stack_init to avoid double initialize each entry.*/
143 IL_CODE_FLAG_STACK_INITED
= 4,
144 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
145 IL_CODE_STACK_MERGED
= 8,
146 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
147 IL_CODE_DELEGATE_SEQUENCE
= 0x10,
148 /*This is a delegate created from a ldftn to a non final virtual method*/
149 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL
= 0x20,
150 /*This is a call to a non final virtual method*/
151 IL_CODE_CALL_NONFINAL_VIRTUAL
= 0x40,
169 guint16 size
, max_size
;
186 /*Allocated fnptr MonoType that should be freed by us.*/
188 /*Type dup'ed exception types from catch blocks.*/
189 GSList
*exception_types
;
194 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
198 MonoMethodSignature
*signature
;
199 MonoMethodHeader
*header
;
201 MonoGenericContext
*generic_context
;
205 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
206 *on a method that creates a delegate for a non-final virtual method using ldftn*/
207 gboolean has_this_store
;
209 /*This flag is used to control if the contructor of the parent class has been called.
210 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
211 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
213 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
214 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
216 gboolean super_ctor_called
;
220 MonoType
*constrained_type
;
224 merge_stacks (VerifyContext
*ctx
, ILCodeDesc
*from
, ILCodeDesc
*to
, gboolean start
, gboolean external
);
227 get_stack_type (MonoType
*type
);
230 mono_delegate_signature_equal (MonoMethodSignature
*delegate_sig
, MonoMethodSignature
*method_sig
, gboolean is_static_ldftn
);
233 mono_class_is_valid_generic_instantiation (VerifyContext
*ctx
, MonoClass
*klass
);
236 mono_method_is_valid_generic_instantiation (VerifyContext
*ctx
, MonoMethod
*method
);
238 static MonoGenericParam
*
239 verifier_get_generic_param_from_type (VerifyContext
*ctx
, MonoType
*type
);
242 verifier_class_is_assignable_from (MonoClass
*target
, MonoClass
*candidate
);
243 //////////////////////////////////////////////////////////////////
248 TYPE_INV
= 0, /* leave at 0. */
253 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
255 /* value types and classes */
257 /* Number of types, used to define the size of the tables*/
260 /* Used by tables to signal that a result is not verifiable*/
261 NON_VERIFIABLE_RESULT
= 0x80,
263 /*Mask used to extract just the type, excluding flags */
266 /* The stack type is a managed pointer, unmask the value to res */
267 POINTER_MASK
= 0x100,
269 /*Stack type with the pointer mask*/
270 RAW_TYPE_MASK
= 0x10F,
272 /* Controlled Mutability Manager Pointer */
275 /* The stack type is a null literal*/
276 NULL_LITERAL_MASK
= 0x400,
278 /**Used by ldarg.0 and family to let delegate verification happens.*/
279 THIS_POINTER_MASK
= 0x800,
281 /**Signals that this is a boxed value type*/
284 /*This is an unitialized this ref*/
285 UNINIT_THIS_MASK
= 0x2000,
288 static const char* const
289 type_names
[TYPE_MAX
+ 1] = {
300 PREFIX_UNALIGNED
= 1,
303 PREFIX_CONSTRAINED
= 8,
306 //////////////////////////////////////////////////////////////////
308 #ifdef ENABLE_VERIFIER_STATS
310 #define _MEM_ALLOC(amt) do { allocated_memory += (amt); working_set += (amt); } while (0)
311 #define _MEM_FREE(amt) do { working_set -= (amt); } while (0)
313 static int allocated_memory
;
314 static int working_set
;
315 static int max_allocated_memory
;
316 static int max_working_set
;
317 static int total_allocated_memory
;
320 finish_collect_stats (void)
322 max_allocated_memory
= MAX (max_allocated_memory
, allocated_memory
);
323 max_working_set
= MAX (max_working_set
, working_set
);
324 total_allocated_memory
+= allocated_memory
;
325 allocated_memory
= working_set
= 0;
329 init_verifier_stats (void)
331 static gboolean inited
;
334 mono_counters_register ("Maximum memory allocated during verification", MONO_COUNTER_METADATA
| MONO_COUNTER_INT
, &max_allocated_memory
);
335 mono_counters_register ("Maximum memory used during verification", MONO_COUNTER_METADATA
| MONO_COUNTER_INT
, &max_working_set
);
336 mono_counters_register ("Total memory allocated for verification", MONO_COUNTER_METADATA
| MONO_COUNTER_INT
, &total_allocated_memory
);
342 #define _MEM_ALLOC(amt) do {} while (0)
343 #define _MEM_FREE(amt) do { } while (0)
345 #define finish_collect_stats()
346 #define init_verifier_stats()
351 //////////////////////////////////////////////////////////////////
354 /*Token validation macros and functions */
355 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
356 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
357 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
358 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
360 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
361 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
362 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
363 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
364 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
365 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
368 * Verify if @token refers to a valid row on int's table.
371 token_bounds_check (MonoImage
*image
, guint32 token
)
373 if (image_is_dynamic (image
))
374 return mono_dynamic_image_is_valid_token ((MonoDynamicImage
*)image
, token
);
375 return image
->tables
[mono_metadata_token_table (token
)].rows
>= mono_metadata_token_index (token
) && mono_metadata_token_index (token
) > 0;
379 mono_type_create_fnptr_from_mono_method (VerifyContext
*ctx
, MonoMethod
*method
)
381 MonoType
*res
= g_new0 (MonoType
, 1);
382 _MEM_ALLOC (sizeof (MonoType
));
384 //FIXME use mono_method_get_signature_full
385 res
->data
.method
= mono_method_signature (method
);
386 res
->type
= MONO_TYPE_FNPTR
;
387 ctx
->funptrs
= g_slist_prepend (ctx
->funptrs
, res
);
392 * mono_type_is_enum_type:
394 * Returns: TRUE if @type is an enum type.
397 mono_type_is_enum_type (MonoType
*type
)
399 if (type
->type
== MONO_TYPE_VALUETYPE
&& type
->data
.klass
->enumtype
)
401 if (type
->type
== MONO_TYPE_GENERICINST
&& type
->data
.generic_class
->container_class
->enumtype
)
407 * mono_type_is_value_type:
409 * Returns: TRUE if @type is named after @namespace.@name.
413 mono_type_is_value_type (MonoType
*type
, const char *namespace_
, const char *name
)
415 return type
->type
== MONO_TYPE_VALUETYPE
&&
416 !strcmp (namespace_
, type
->data
.klass
->name_space
) &&
417 !strcmp (name
, type
->data
.klass
->name
);
421 * Returns TURE if @type is VAR or MVAR
424 mono_type_is_generic_argument (MonoType
*type
)
426 return type
->type
== MONO_TYPE_VAR
|| type
->type
== MONO_TYPE_MVAR
;
430 * mono_type_get_underlying_type_any:
432 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
434 * Returns the underlying type of @type regardless if it is byref or not.
437 mono_type_get_underlying_type_any (MonoType
*type
)
439 if (type
->type
== MONO_TYPE_VALUETYPE
&& type
->data
.klass
->enumtype
)
440 return mono_class_enum_basetype (type
->data
.klass
);
441 if (type
->type
== MONO_TYPE_GENERICINST
&& type
->data
.generic_class
->container_class
->enumtype
)
442 return mono_class_enum_basetype (type
->data
.generic_class
->container_class
);
446 static G_GNUC_UNUSED
const char*
447 mono_type_get_stack_name (MonoType
*type
)
449 return type_names
[get_stack_type (type
) & TYPE_MASK
];
452 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
453 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
456 mono_method_is_constructor (MonoMethod
*method
)
458 return ((method
->flags
& CTOR_REQUIRED_FLAGS
) == CTOR_REQUIRED_FLAGS
&&
459 !(method
->flags
& CTOR_INVALID_FLAGS
) &&
460 !strcmp (".ctor", method
->name
));
464 mono_class_has_default_constructor (MonoClass
*klass
)
469 mono_class_setup_methods (klass
);
470 if (mono_class_has_failure (klass
))
473 int mcount
= mono_class_get_method_count (klass
);
474 for (i
= 0; i
< mcount
; ++i
) {
475 method
= klass
->methods
[i
];
476 if (mono_method_is_constructor (method
) &&
477 mono_method_signature (method
) &&
478 mono_method_signature (method
)->param_count
== 0 &&
479 (method
->flags
& METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK
) == METHOD_ATTRIBUTE_PUBLIC
)
486 * Verify if @type is valid for the given @ctx verification context.
487 * this function checks for VAR and MVAR types that are invalid under the current verifier,
490 mono_type_is_valid_type_in_context_full (MonoType
*type
, MonoGenericContext
*context
, gboolean check_gtd
)
493 MonoGenericInst
*inst
;
495 switch (type
->type
) {
500 inst
= type
->type
== MONO_TYPE_VAR
? context
->class_inst
: context
->method_inst
;
501 if (!inst
|| mono_type_get_generic_param_num (type
) >= inst
->type_argc
)
504 case MONO_TYPE_SZARRAY
:
505 return mono_type_is_valid_type_in_context_full (&type
->data
.klass
->byval_arg
, context
, check_gtd
);
506 case MONO_TYPE_ARRAY
:
507 return mono_type_is_valid_type_in_context_full (&type
->data
.array
->eklass
->byval_arg
, context
, check_gtd
);
509 return mono_type_is_valid_type_in_context_full (type
->data
.type
, context
, check_gtd
);
510 case MONO_TYPE_GENERICINST
:
511 inst
= type
->data
.generic_class
->context
.class_inst
;
514 for (i
= 0; i
< inst
->type_argc
; ++i
)
515 if (!mono_type_is_valid_type_in_context_full (inst
->type_argv
[i
], context
, check_gtd
))
518 case MONO_TYPE_CLASS
:
519 case MONO_TYPE_VALUETYPE
: {
520 MonoClass
*klass
= type
->data
.klass
;
522 * It's possible to encode generic'sh types in such a way that they disguise themselves as class or valuetype.
523 * Fixing the type decoding is really tricky since under some cases this behavior is needed, for example, to
524 * have a 'class' type pointing to a 'genericinst' class.
526 * For the runtime these non canonical (weird) encodings work fine, the worst they can cause is some
527 * reflection oddities which are harmless - to security at least.
529 if (klass
->byval_arg
.type
!= type
->type
)
530 return mono_type_is_valid_type_in_context_full (&klass
->byval_arg
, context
, check_gtd
);
532 if (check_gtd
&& mono_class_is_gtd (klass
))
543 mono_type_is_valid_type_in_context (MonoType
*type
, MonoGenericContext
*context
)
545 return mono_type_is_valid_type_in_context_full (type
, context
, FALSE
);
548 /*This function returns NULL if the type is not instantiatable*/
550 verifier_inflate_type (VerifyContext
*ctx
, MonoType
*type
, MonoGenericContext
*context
)
555 result
= mono_class_inflate_generic_type_checked (type
, context
, &error
);
556 if (!mono_error_ok (&error
)) {
557 mono_error_cleanup (&error
);
563 /*A side note here. We don't need to check if arguments are broken since this
564 is only need to be done by the runtime before realizing the type.
567 is_valid_generic_instantiation (MonoGenericContainer
*gc
, MonoGenericContext
*context
, MonoGenericInst
*ginst
)
572 if (ginst
->type_argc
!= gc
->type_argc
)
575 for (i
= 0; i
< gc
->type_argc
; ++i
) {
576 MonoGenericParamInfo
*param_info
= mono_generic_container_get_param_info (gc
, i
);
577 MonoClass
*paramClass
;
578 MonoClass
**constraints
;
579 MonoType
*param_type
= ginst
->type_argv
[i
];
581 /*it's not our job to validate type variables*/
582 if (mono_type_is_generic_argument (param_type
))
585 paramClass
= mono_class_from_mono_type (param_type
);
588 /* A GTD can't be a generic argument.
590 * Due to how types are encoded we must check for the case of a genericinst MonoType and GTD MonoClass.
591 * This happens in cases such as: class Foo<T> { void X() { new Bar<T> (); } }
593 * Open instantiations can have GTDs as this happens when one type is instantiated with others params
594 * and the former has an expansion into the later. For example:
596 * class A<T>: B<K> {}
597 * The type A <K> has a parent B<K>, that is inflated into the GTD B<>.
598 * Since A<K> is open, thus not instantiatable, this is valid.
600 if (mono_class_is_gtd (paramClass
) && param_type
->type
!= MONO_TYPE_GENERICINST
&& !ginst
->is_open
)
603 /*it's not safe to call mono_class_init from here*/
604 if (mono_class_is_ginst (paramClass
) && !paramClass
->inited
) {
605 if (!mono_class_is_valid_generic_instantiation (NULL
, paramClass
))
609 if (!param_info
->constraints
&& !(param_info
->flags
& GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK
))
612 if ((param_info
->flags
& GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT
) && (!paramClass
->valuetype
|| mono_class_is_nullable (paramClass
)))
615 if ((param_info
->flags
& GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT
) && paramClass
->valuetype
)
618 if ((param_info
->flags
& GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT
) && !paramClass
->valuetype
&& !mono_class_has_default_constructor (paramClass
))
621 if (!param_info
->constraints
)
624 for (constraints
= param_info
->constraints
; *constraints
; ++constraints
) {
625 MonoClass
*ctr
= *constraints
;
628 inflated
= mono_class_inflate_generic_type_checked (&ctr
->byval_arg
, context
, &error
);
629 if (!mono_error_ok (&error
)) {
630 mono_error_cleanup (&error
);
633 ctr
= mono_class_from_mono_type (inflated
);
634 mono_metadata_free_type (inflated
);
636 /*FIXME maybe we need the same this as verifier_class_is_assignable_from*/
637 if (!mono_class_is_assignable_from_slow (ctr
, paramClass
))
645 * mono_generic_param_is_constraint_compatible:
647 * Returns: TRUE if @candidate is constraint compatible with @target.
649 * This means that @candidate constraints are a super set of @target constaints
652 mono_generic_param_is_constraint_compatible (VerifyContext
*ctx
, MonoGenericParam
*target
, MonoGenericParam
*candidate
, MonoClass
*candidate_param_class
, MonoGenericContext
*context
)
654 MonoGenericParamInfo
*tinfo
= mono_generic_param_info (target
);
655 MonoGenericParamInfo
*cinfo
= mono_generic_param_info (candidate
);
656 MonoClass
**candidate_class
;
657 gboolean class_constraint_satisfied
= FALSE
;
658 gboolean valuetype_constraint_satisfied
= FALSE
;
660 int tmask
= tinfo
->flags
& GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK
;
661 int cmask
= cinfo
->flags
& GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK
;
663 if (cinfo
->constraints
) {
664 for (candidate_class
= cinfo
->constraints
; *candidate_class
; ++candidate_class
) {
666 MonoType
*inflated
= verifier_inflate_type (ctx
, &(*candidate_class
)->byval_arg
, ctx
->generic_context
);
669 cc
= mono_class_from_mono_type (inflated
);
670 mono_metadata_free_type (inflated
);
672 if (mono_type_is_reference (&cc
->byval_arg
) && !MONO_CLASS_IS_INTERFACE (cc
))
673 class_constraint_satisfied
= TRUE
;
674 else if (!mono_type_is_reference (&cc
->byval_arg
) && !MONO_CLASS_IS_INTERFACE (cc
))
675 valuetype_constraint_satisfied
= TRUE
;
678 class_constraint_satisfied
|= (cmask
& GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT
) != 0;
679 valuetype_constraint_satisfied
|= (cmask
& GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT
) != 0;
681 if ((tmask
& GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT
) && !class_constraint_satisfied
)
683 if ((tmask
& GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT
) && !valuetype_constraint_satisfied
)
685 if ((tmask
& GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT
) && !((cmask
& GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT
) ||
686 valuetype_constraint_satisfied
)) {
691 if (tinfo
->constraints
) {
692 MonoClass
**target_class
;
693 for (target_class
= tinfo
->constraints
; *target_class
; ++target_class
) {
695 MonoType
*inflated
= verifier_inflate_type (ctx
, &(*target_class
)->byval_arg
, context
);
698 tc
= mono_class_from_mono_type (inflated
);
699 mono_metadata_free_type (inflated
);
702 * A constraint from @target might inflate into @candidate itself and in that case we don't need
703 * check it's constraints since it satisfy the constraint by itself.
705 if (mono_metadata_type_equal (&tc
->byval_arg
, &candidate_param_class
->byval_arg
))
708 if (!cinfo
->constraints
)
711 for (candidate_class
= cinfo
->constraints
; *candidate_class
; ++candidate_class
) {
713 inflated
= verifier_inflate_type (ctx
, &(*candidate_class
)->byval_arg
, ctx
->generic_context
);
716 cc
= mono_class_from_mono_type (inflated
);
717 mono_metadata_free_type (inflated
);
719 if (verifier_class_is_assignable_from (tc
, cc
))
723 * This happens when we have the following:
725 * Bar<K> where K : IFace
726 * Foo<T, U> where T : U where U : IFace
728 * Bar<T> <- T here satisfy K constraint transitively through to U's constraint
731 if (mono_type_is_generic_argument (&cc
->byval_arg
)) {
732 MonoGenericParam
*other_candidate
= verifier_get_generic_param_from_type (ctx
, &cc
->byval_arg
);
734 if (mono_generic_param_is_constraint_compatible (ctx
, target
, other_candidate
, cc
, context
)) {
739 if (!*candidate_class
)
746 static MonoGenericParam
*
747 verifier_get_generic_param_from_type (VerifyContext
*ctx
, MonoType
*type
)
749 MonoGenericContainer
*gc
;
750 MonoMethod
*method
= ctx
->method
;
753 num
= mono_type_get_generic_param_num (type
);
755 if (type
->type
== MONO_TYPE_VAR
) {
756 MonoClass
*gtd
= method
->klass
;
757 if (mono_class_is_ginst (gtd
))
758 gtd
= mono_class_get_generic_class (gtd
)->container_class
;
759 gc
= mono_class_try_get_generic_container (gtd
);
761 MonoMethod
*gmd
= method
;
762 if (method
->is_inflated
)
763 gmd
= ((MonoMethodInflated
*)method
)->declaring
;
764 gc
= mono_method_get_generic_container (gmd
);
768 return mono_generic_container_get_param (gc
, num
);
774 * Verify if @type is valid for the given @ctx verification context.
775 * this function checks for VAR and MVAR types that are invalid under the current verifier,
776 * This means that it either
779 is_valid_type_in_context (VerifyContext
*ctx
, MonoType
*type
)
781 return mono_type_is_valid_type_in_context (type
, ctx
->generic_context
);
785 is_valid_generic_instantiation_in_context (VerifyContext
*ctx
, MonoGenericInst
*ginst
, gboolean check_gtd
)
788 for (i
= 0; i
< ginst
->type_argc
; ++i
) {
789 MonoType
*type
= ginst
->type_argv
[i
];
791 if (!mono_type_is_valid_type_in_context_full (type
, ctx
->generic_context
, TRUE
))
798 generic_arguments_respect_constraints (VerifyContext
*ctx
, MonoGenericContainer
*gc
, MonoGenericContext
*context
, MonoGenericInst
*ginst
)
801 for (i
= 0; i
< ginst
->type_argc
; ++i
) {
802 MonoType
*type
= ginst
->type_argv
[i
];
803 MonoGenericParam
*target
= mono_generic_container_get_param (gc
, i
);
804 MonoGenericParam
*candidate
;
805 MonoClass
*candidate_class
;
807 if (!mono_type_is_generic_argument (type
))
810 if (!is_valid_type_in_context (ctx
, type
))
813 candidate
= verifier_get_generic_param_from_type (ctx
, type
);
814 candidate_class
= mono_class_from_mono_type (type
);
816 if (!mono_generic_param_is_constraint_compatible (ctx
, target
, candidate
, candidate_class
, context
))
823 mono_method_repect_method_constraints (VerifyContext
*ctx
, MonoMethod
*method
)
825 MonoMethodInflated
*gmethod
= (MonoMethodInflated
*)method
;
826 MonoGenericInst
*ginst
= gmethod
->context
.method_inst
;
827 MonoGenericContainer
*gc
= mono_method_get_generic_container (gmethod
->declaring
);
828 return !gc
|| generic_arguments_respect_constraints (ctx
, gc
, &gmethod
->context
, ginst
);
832 mono_class_repect_method_constraints (VerifyContext
*ctx
, MonoClass
*klass
)
834 MonoGenericClass
*gklass
= mono_class_get_generic_class (klass
);
835 MonoGenericInst
*ginst
= gklass
->context
.class_inst
;
836 MonoGenericContainer
*gc
= mono_class_get_generic_container (gklass
->container_class
);
837 return !gc
|| generic_arguments_respect_constraints (ctx
, gc
, &gklass
->context
, ginst
);
841 mono_method_is_valid_generic_instantiation (VerifyContext
*ctx
, MonoMethod
*method
)
843 MonoMethodInflated
*gmethod
= (MonoMethodInflated
*)method
;
844 MonoGenericInst
*ginst
= gmethod
->context
.method_inst
;
845 MonoGenericContainer
*gc
= mono_method_get_generic_container (gmethod
->declaring
);
846 if (!gc
) /*non-generic inflated method - it's part of a generic type */
848 if (ctx
&& !is_valid_generic_instantiation_in_context (ctx
, ginst
, TRUE
))
850 return is_valid_generic_instantiation (gc
, &gmethod
->context
, ginst
);
855 mono_class_is_valid_generic_instantiation (VerifyContext
*ctx
, MonoClass
*klass
)
857 MonoGenericClass
*gklass
= mono_class_get_generic_class (klass
);
858 MonoGenericInst
*ginst
= gklass
->context
.class_inst
;
859 MonoGenericContainer
*gc
= mono_class_get_generic_container (gklass
->container_class
);
860 if (ctx
&& !is_valid_generic_instantiation_in_context (ctx
, ginst
, TRUE
))
862 return is_valid_generic_instantiation (gc
, &gklass
->context
, ginst
);
866 mono_type_is_valid_in_context (VerifyContext
*ctx
, MonoType
*type
)
871 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid null type at 0x%04x", ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
875 if (!is_valid_type_in_context (ctx
, type
)) {
876 char *str
= mono_type_full_name (type
);
877 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
878 str
[0] == '!' ? "" : type
->type
== MONO_TYPE_VAR
? "!" : "!!",
880 type
->type
== MONO_TYPE_VAR
? "class" : "method",
882 MONO_EXCEPTION_BAD_IMAGE
);
887 klass
= mono_class_from_mono_type (type
);
888 mono_class_init (klass
);
889 if (mono_class_has_failure (klass
)) {
890 if (mono_class_is_ginst (klass
) && !mono_class_is_valid_generic_instantiation (NULL
, klass
))
891 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid generic instantiation of type %s.%s at 0x%04x", klass
->name_space
, klass
->name
, ctx
->ip_offset
), MONO_EXCEPTION_TYPE_LOAD
);
893 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Could not load type %s.%s at 0x%04x", klass
->name_space
, klass
->name
, ctx
->ip_offset
), MONO_EXCEPTION_TYPE_LOAD
);
897 if (mono_class_is_ginst (klass
) && mono_class_has_failure (mono_class_get_generic_class (klass
)->container_class
)) {
898 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Could not load type %s.%s at 0x%04x", klass
->name_space
, klass
->name
, ctx
->ip_offset
), MONO_EXCEPTION_TYPE_LOAD
);
902 if (!mono_class_is_ginst (klass
))
905 if (!mono_class_is_valid_generic_instantiation (ctx
, klass
)) {
906 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid generic type instantiation of type %s.%s at 0x%04x", klass
->name_space
, klass
->name
, ctx
->ip_offset
), MONO_EXCEPTION_TYPE_LOAD
);
910 if (!mono_class_repect_method_constraints (ctx
, klass
)) {
911 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid generic type instantiation of type %s.%s (generic args don't respect target's constraints) at 0x%04x", klass
->name_space
, klass
->name
, ctx
->ip_offset
), MONO_EXCEPTION_TYPE_LOAD
);
918 static verify_result_t
919 mono_method_is_valid_in_context (VerifyContext
*ctx
, MonoMethod
*method
)
921 if (!mono_type_is_valid_in_context (ctx
, &method
->klass
->byval_arg
))
922 return RESULT_INVALID
;
924 if (!method
->is_inflated
)
927 if (!mono_method_is_valid_generic_instantiation (ctx
, method
)) {
928 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid generic method instantiation of method %s.%s::%s at 0x%04x", method
->klass
->name_space
, method
->klass
->name
, method
->name
, ctx
->ip_offset
), MONO_EXCEPTION_UNVERIFIABLE_IL
);
929 return RESULT_INVALID
;
932 if (!mono_method_repect_method_constraints (ctx
, method
)) {
933 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid generic method instantiation of method %s.%s::%s (generic args don't respect target's constraints) at 0x%04x", method
->klass
->name_space
, method
->klass
->name
, method
->name
, ctx
->ip_offset
));
934 return RESULT_UNVERIFIABLE
;
940 static MonoClassField
*
941 verifier_load_field (VerifyContext
*ctx
, int token
, MonoClass
**out_klass
, const char *opcode
) {
943 MonoClassField
*field
;
944 MonoClass
*klass
= NULL
;
946 if (ctx
->method
->wrapper_type
!= MONO_WRAPPER_NONE
) {
947 field
= (MonoClassField
*)mono_method_get_wrapper_data (ctx
->method
, (guint32
)token
);
948 klass
= field
? field
->parent
: NULL
;
950 if (!IS_FIELD_DEF_OR_REF (token
) || !token_bounds_check (ctx
->image
, token
)) {
951 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid field token 0x%08x for %s at 0x%04x", token
, opcode
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
955 field
= mono_field_from_token_checked (ctx
->image
, token
, &klass
, ctx
->generic_context
, &error
);
956 mono_error_cleanup (&error
); /*FIXME don't swallow the error */
959 if (!field
|| !field
->parent
|| !klass
) {
960 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Cannot load field from token 0x%08x for %s at 0x%04x", token
, opcode
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
964 if (!mono_type_is_valid_in_context (ctx
, &klass
->byval_arg
))
967 if (mono_field_get_flags (field
) & FIELD_ATTRIBUTE_LITERAL
) {
968 char *type_name
= mono_type_get_full_name (field
->parent
);
969 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Cannot reference literal field %s::%s at 0x%04x", type_name
, field
->name
, ctx
->ip_offset
));
979 verifier_load_method (VerifyContext
*ctx
, int token
, const char *opcode
) {
983 if (ctx
->method
->wrapper_type
!= MONO_WRAPPER_NONE
) {
984 method
= (MonoMethod
*)mono_method_get_wrapper_data (ctx
->method
, (guint32
)token
);
987 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token
) || !token_bounds_check (ctx
->image
, token
)) {
988 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid method token 0x%08x for %s at 0x%04x", token
, opcode
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
992 method
= mono_get_method_checked (ctx
->image
, token
, NULL
, ctx
->generic_context
, &error
);
993 mono_error_cleanup (&error
); /* FIXME don't swallow this error */
997 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Cannot load method from token 0x%08x for %s at 0x%04x", token
, opcode
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
1001 if (mono_method_is_valid_in_context (ctx
, method
) == RESULT_INVALID
)
1008 verifier_load_type (VerifyContext
*ctx
, int token
, const char *opcode
) {
1011 if (ctx
->method
->wrapper_type
!= MONO_WRAPPER_NONE
) {
1012 MonoClass
*klass
= (MonoClass
*)mono_method_get_wrapper_data (ctx
->method
, (guint32
)token
);
1013 type
= klass
? &klass
->byval_arg
: NULL
;
1016 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token
) || !token_bounds_check (ctx
->image
, token
)) {
1017 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
1020 type
= mono_type_get_checked (ctx
->image
, token
, ctx
->generic_context
, &error
);
1021 mono_error_cleanup (&error
); /*FIXME don't swallow the error */
1025 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Cannot load type from token 0x%08x for %s at 0x%04x", token
, opcode
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
1029 if (!mono_type_is_valid_in_context (ctx
, type
))
1036 /* stack_slot_get_type:
1038 * Returns the stack type of @value. This value includes POINTER_MASK.
1040 * Use this function to checks that account for a managed pointer.
1043 stack_slot_get_type (ILStackDesc
*value
)
1045 return value
->stype
& RAW_TYPE_MASK
;
1048 /* stack_slot_get_underlying_type:
1050 * Returns the stack type of @value. This value does not include POINTER_MASK.
1052 * Use this function is cases where the fact that the value could be a managed pointer is
1053 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1056 stack_slot_get_underlying_type (ILStackDesc
*value
)
1058 return value
->stype
& TYPE_MASK
;
1061 /* stack_slot_is_managed_pointer:
1063 * Returns TRUE is @value is a managed pointer.
1066 stack_slot_is_managed_pointer (ILStackDesc
*value
)
1068 return (value
->stype
& POINTER_MASK
) == POINTER_MASK
;
1071 /* stack_slot_is_managed_mutability_pointer:
1073 * Returns TRUE is @value is a managed mutability pointer.
1075 static G_GNUC_UNUSED gboolean
1076 stack_slot_is_managed_mutability_pointer (ILStackDesc
*value
)
1078 return (value
->stype
& CMMP_MASK
) == CMMP_MASK
;
1081 /* stack_slot_is_null_literal:
1083 * Returns TRUE is @value is the null literal.
1086 stack_slot_is_null_literal (ILStackDesc
*value
)
1088 return (value
->stype
& NULL_LITERAL_MASK
) == NULL_LITERAL_MASK
;
1092 /* stack_slot_is_this_pointer:
1094 * Returns TRUE is @value is the this literal
1097 stack_slot_is_this_pointer (ILStackDesc
*value
)
1099 return (value
->stype
& THIS_POINTER_MASK
) == THIS_POINTER_MASK
;
1102 /* stack_slot_is_boxed_value:
1104 * Returns TRUE is @value is a boxed value
1107 stack_slot_is_boxed_value (ILStackDesc
*value
)
1109 return (value
->stype
& BOXED_MASK
) == BOXED_MASK
;
1113 stack_slot_get_name (ILStackDesc
*value
)
1115 return type_names
[value
->stype
& TYPE_MASK
];
1118 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1119 if (PRED (value)) { \
1121 g_string_append (str, ", "); \
1122 g_string_append (str, NAME); \
1127 stack_slot_stack_type_full_name (ILStackDesc
*value
)
1129 GString
*str
= g_string_new ("");
1131 gboolean has_pred
= FALSE
, first
= TRUE
;
1133 if ((value
->stype
& TYPE_MASK
) != value
->stype
) {
1134 g_string_append(str
, "[");
1135 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer
, "this");
1136 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value
, "boxed");
1137 APPEND_WITH_PREDICATE (stack_slot_is_null_literal
, "null");
1138 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer
, "cmmp");
1139 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer
, "mp");
1143 if (mono_type_is_generic_argument (value
->type
) && !stack_slot_is_boxed_value (value
)) {
1145 g_string_append(str
, "[");
1147 g_string_append (str
, ", ");
1148 g_string_append (str
, "unboxed");
1153 g_string_append(str
, "] ");
1155 g_string_append (str
, stack_slot_get_name (value
));
1157 g_string_free (str
, FALSE
);
1162 stack_slot_full_name (ILStackDesc
*value
)
1164 char *type_name
= mono_type_full_name (value
->type
);
1165 char *stack_name
= stack_slot_stack_type_full_name (value
);
1166 char *res
= g_strdup_printf ("%s (%s)", type_name
, stack_name
);
1168 g_free (stack_name
);
1172 //////////////////////////////////////////////////////////////////
1174 mono_free_verify_list (GSList
*list
)
1176 MonoVerifyInfoExtended
*info
;
1179 for (tmp
= list
; tmp
; tmp
= tmp
->next
) {
1180 info
= (MonoVerifyInfoExtended
*)tmp
->data
;
1181 g_free (info
->info
.message
);
1184 g_slist_free (list
);
1187 #define ADD_ERROR(list,msg) \
1189 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1190 vinfo->info.status = MONO_VERIFY_ERROR; \
1191 vinfo->info.message = (msg); \
1192 (list) = g_slist_prepend ((list), vinfo); \
1195 #define ADD_WARN(list,code,msg) \
1197 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1198 vinfo->info.status = (code); \
1199 vinfo->info.message = (msg); \
1200 (list) = g_slist_prepend ((list), vinfo); \
1203 #define ADD_INVALID(list,msg) \
1205 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1206 vinfo->status = MONO_VERIFY_ERROR; \
1207 vinfo->message = (msg); \
1208 (list) = g_slist_prepend ((list), vinfo); \
1209 /*G_BREAKPOINT ();*/ \
1213 #define CHECK_STACK_UNDERFLOW(num) \
1215 if (cur_stack < (num)) \
1216 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1219 #define CHECK_STACK_OVERFLOW() \
1221 if (cur_stack >= max_stack) \
1222 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1227 in_any_block (MonoMethodHeader
*header
, guint offset
)
1230 MonoExceptionClause
*clause
;
1232 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1233 clause
= &header
->clauses
[i
];
1234 if (MONO_OFFSET_IN_CLAUSE (clause
, offset
))
1236 if (MONO_OFFSET_IN_HANDLER (clause
, offset
))
1238 if (MONO_OFFSET_IN_FILTER (clause
, offset
))
1245 * in_any_exception_block:
1247 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1250 in_any_exception_block (MonoMethodHeader
*header
, guint offset
)
1253 MonoExceptionClause
*clause
;
1255 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1256 clause
= &header
->clauses
[i
];
1257 if (MONO_OFFSET_IN_HANDLER (clause
, offset
))
1259 if (MONO_OFFSET_IN_FILTER (clause
, offset
))
1266 * is_valid_branch_instruction:
1268 * Verify if it's valid to perform a branch from @offset to @target.
1269 * This should be used with br and brtrue/false.
1270 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1271 * The major difference from other similiar functions is that branching into a
1272 * finally/fault block is invalid instead of just unverifiable.
1275 is_valid_branch_instruction (MonoMethodHeader
*header
, guint offset
, guint target
)
1278 MonoExceptionClause
*clause
;
1280 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1281 clause
= &header
->clauses
[i
];
1282 /*branching into a finally block is invalid*/
1283 if ((clause
->flags
== MONO_EXCEPTION_CLAUSE_FINALLY
|| clause
->flags
== MONO_EXCEPTION_CLAUSE_FAULT
) &&
1284 !MONO_OFFSET_IN_HANDLER (clause
, offset
) &&
1285 MONO_OFFSET_IN_HANDLER (clause
, target
))
1288 if (clause
->try_offset
!= target
&& (MONO_OFFSET_IN_CLAUSE (clause
, offset
) ^ MONO_OFFSET_IN_CLAUSE (clause
, target
)))
1290 if (MONO_OFFSET_IN_HANDLER (clause
, offset
) ^ MONO_OFFSET_IN_HANDLER (clause
, target
))
1292 if (MONO_OFFSET_IN_FILTER (clause
, offset
) ^ MONO_OFFSET_IN_FILTER (clause
, target
))
1299 * is_valid_cmp_branch_instruction:
1301 * Verify if it's valid to perform a branch from @offset to @target.
1302 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1303 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1305 * The major differences from other similar functions are that most errors lead to invalid
1306 * code and only branching out of finally, filter or fault clauses is unverifiable.
1309 is_valid_cmp_branch_instruction (MonoMethodHeader
*header
, guint offset
, guint target
)
1312 MonoExceptionClause
*clause
;
1314 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1315 clause
= &header
->clauses
[i
];
1316 /*branching out of a handler or finally*/
1317 if (clause
->flags
!= MONO_EXCEPTION_CLAUSE_NONE
&&
1318 MONO_OFFSET_IN_HANDLER (clause
, offset
) &&
1319 !MONO_OFFSET_IN_HANDLER (clause
, target
))
1322 if (clause
->try_offset
!= target
&& (MONO_OFFSET_IN_CLAUSE (clause
, offset
) ^ MONO_OFFSET_IN_CLAUSE (clause
, target
)))
1324 if (MONO_OFFSET_IN_HANDLER (clause
, offset
) ^ MONO_OFFSET_IN_HANDLER (clause
, target
))
1326 if (MONO_OFFSET_IN_FILTER (clause
, offset
) ^ MONO_OFFSET_IN_FILTER (clause
, target
))
1333 * A leave can't escape a finally block
1336 is_correct_leave (MonoMethodHeader
*header
, guint offset
, guint target
)
1339 MonoExceptionClause
*clause
;
1341 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1342 clause
= &header
->clauses
[i
];
1343 if (clause
->flags
== MONO_EXCEPTION_CLAUSE_FINALLY
&& MONO_OFFSET_IN_HANDLER (clause
, offset
) && !MONO_OFFSET_IN_HANDLER (clause
, target
))
1345 if (MONO_OFFSET_IN_FILTER (clause
, offset
))
1352 * A rethrow can't happen outside of a catch handler.
1355 is_correct_rethrow (MonoMethodHeader
*header
, guint offset
)
1358 MonoExceptionClause
*clause
;
1360 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1361 clause
= &header
->clauses
[i
];
1362 if (MONO_OFFSET_IN_HANDLER (clause
, offset
))
1369 * An endfinally can't happen outside of a finally/fault handler.
1372 is_correct_endfinally (MonoMethodHeader
*header
, guint offset
)
1375 MonoExceptionClause
*clause
;
1377 for (i
= 0; i
< header
->num_clauses
; ++i
) {
1378 clause
= &header
->clauses
[i
];
1379 if (MONO_OFFSET_IN_HANDLER (clause
, offset
) && (clause
->flags
== MONO_EXCEPTION_CLAUSE_FAULT
|| clause
->flags
== MONO_EXCEPTION_CLAUSE_FINALLY
))
1387 * An endfilter can only happens inside a filter clause.
1388 * In non-strict mode filter is allowed inside the handler clause too
1390 static MonoExceptionClause
*
1391 is_correct_endfilter (VerifyContext
*ctx
, guint offset
)
1394 MonoExceptionClause
*clause
;
1396 for (i
= 0; i
< ctx
->header
->num_clauses
; ++i
) {
1397 clause
= &ctx
->header
->clauses
[i
];
1398 if (clause
->flags
!= MONO_EXCEPTION_CLAUSE_FILTER
)
1400 if (MONO_OFFSET_IN_FILTER (clause
, offset
))
1402 if (!IS_STRICT_MODE (ctx
) && MONO_OFFSET_IN_HANDLER (clause
, offset
))
1410 * Non-strict endfilter can happens inside a try block or any handler block
1413 is_unverifiable_endfilter (VerifyContext
*ctx
, guint offset
)
1416 MonoExceptionClause
*clause
;
1418 for (i
= 0; i
< ctx
->header
->num_clauses
; ++i
) {
1419 clause
= &ctx
->header
->clauses
[i
];
1420 if (MONO_OFFSET_IN_CLAUSE (clause
, offset
))
1427 is_valid_bool_arg (ILStackDesc
*arg
)
1429 if (stack_slot_is_managed_pointer (arg
) || stack_slot_is_boxed_value (arg
) || stack_slot_is_null_literal (arg
))
1433 switch (stack_slot_get_underlying_type (arg
)) {
1436 case TYPE_NATIVE_INT
:
1440 g_assert (arg
->type
);
1441 switch (arg
->type
->type
) {
1442 case MONO_TYPE_CLASS
:
1443 case MONO_TYPE_STRING
:
1444 case MONO_TYPE_OBJECT
:
1445 case MONO_TYPE_SZARRAY
:
1446 case MONO_TYPE_ARRAY
:
1447 case MONO_TYPE_FNPTR
:
1450 case MONO_TYPE_GENERICINST
:
1451 /*We need to check if the container class
1452 * of the generic type is a valuetype, iow:
1453 * is it a "class Foo<T>" or a "struct Foo<T>"?
1455 return !arg
->type
->data
.generic_class
->container_class
->valuetype
;
1465 /*Type manipulation helper*/
1467 /*Returns the byref version of the supplied MonoType*/
1469 mono_type_get_type_byref (MonoType
*type
)
1473 return &mono_class_from_mono_type (type
)->this_arg
;
1477 /*Returns the byval version of the supplied MonoType*/
1479 mono_type_get_type_byval (MonoType
*type
)
1483 return &mono_class_from_mono_type (type
)->byval_arg
;
1487 mono_type_from_stack_slot (ILStackDesc
*slot
)
1489 if (stack_slot_is_managed_pointer (slot
))
1490 return mono_type_get_type_byref (slot
->type
);
1494 /*Stack manipulation code*/
1497 ensure_stack_size (ILCodeDesc
*stack
, int required
)
1502 if (required
< stack
->max_size
)
1505 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1506 new_size
= MAX (8, MAX (required
, stack
->max_size
* 2));
1508 g_assert (new_size
>= stack
->size
);
1509 g_assert (new_size
>= required
);
1511 tmp
= g_new0 (ILStackDesc
, new_size
);
1512 _MEM_ALLOC (sizeof (ILStackDesc
) * new_size
);
1516 memcpy (tmp
, stack
->stack
, stack
->size
* sizeof (ILStackDesc
));
1517 g_free (stack
->stack
);
1518 _MEM_FREE (sizeof (ILStackDesc
) * stack
->max_size
);
1522 stack
->max_size
= new_size
;
1526 stack_init (VerifyContext
*ctx
, ILCodeDesc
*state
)
1528 if (state
->flags
& IL_CODE_FLAG_STACK_INITED
)
1530 state
->size
= state
->max_size
= 0;
1531 state
->flags
|= IL_CODE_FLAG_STACK_INITED
;
1535 stack_copy (ILCodeDesc
*to
, ILCodeDesc
*from
)
1537 ensure_stack_size (to
, from
->size
);
1538 to
->size
= from
->size
;
1540 /*stack copy happens at merge points, which have small stacks*/
1542 memcpy (to
->stack
, from
->stack
, sizeof (ILStackDesc
) * from
->size
);
1546 copy_stack_value (ILStackDesc
*to
, ILStackDesc
*from
)
1548 to
->stype
= from
->stype
;
1549 to
->type
= from
->type
;
1550 to
->method
= from
->method
;
1554 check_underflow (VerifyContext
*ctx
, int size
)
1556 if (ctx
->eval
.size
< size
) {
1557 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size
, ctx
->eval
.size
, ctx
->ip_offset
));
1564 check_overflow (VerifyContext
*ctx
)
1566 if (ctx
->eval
.size
>= ctx
->max_stack
) {
1567 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx
->eval
.size
+ 1, ctx
->ip_offset
));
1573 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1575 check_unmanaged_pointer (VerifyContext
*ctx
, ILStackDesc
*value
)
1577 if (stack_slot_get_type (value
) == TYPE_PTR
) {
1578 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx
->ip_offset
));
1584 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1586 check_unverifiable_type (VerifyContext
*ctx
, MonoType
*type
)
1588 if (type
->type
== MONO_TYPE_PTR
|| type
->type
== MONO_TYPE_FNPTR
) {
1589 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx
->ip_offset
));
1595 static ILStackDesc
*
1596 stack_push (VerifyContext
*ctx
)
1598 g_assert (ctx
->eval
.size
< ctx
->max_stack
);
1599 g_assert (ctx
->eval
.size
<= ctx
->eval
.max_size
);
1601 ensure_stack_size (&ctx
->eval
, ctx
->eval
.size
+ 1);
1603 return & ctx
->eval
.stack
[ctx
->eval
.size
++];
1606 static ILStackDesc
*
1607 stack_push_val (VerifyContext
*ctx
, int stype
, MonoType
*type
)
1609 ILStackDesc
*top
= stack_push (ctx
);
1615 static ILStackDesc
*
1616 stack_pop (VerifyContext
*ctx
)
1619 g_assert (ctx
->eval
.size
> 0);
1620 ret
= ctx
->eval
.stack
+ --ctx
->eval
.size
;
1621 if ((ret
->stype
& UNINIT_THIS_MASK
) == UNINIT_THIS_MASK
)
1622 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx
->ip_offset
));
1626 /* This function allows to safely pop an unititialized this ptr from
1627 * the eval stack without marking the method as unverifiable.
1629 static ILStackDesc
*
1630 stack_pop_safe (VerifyContext
*ctx
)
1632 g_assert (ctx
->eval
.size
> 0);
1633 return ctx
->eval
.stack
+ --ctx
->eval
.size
;
1636 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1638 stack_peek (VerifyContext
*ctx
, int distance
)
1640 g_assert (ctx
->eval
.size
- distance
> 0);
1641 return ctx
->eval
.stack
+ (ctx
->eval
.size
- 1 - distance
);
1644 static ILStackDesc
*
1645 stack_push_stack_val (VerifyContext
*ctx
, ILStackDesc
*value
)
1647 ILStackDesc
*top
= stack_push (ctx
);
1648 copy_stack_value (top
, value
);
1652 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1654 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1657 get_boxable_mono_type (VerifyContext
* ctx
, int token
, const char *opcode
)
1662 if (!(type
= verifier_load_type (ctx
, token
, opcode
)))
1665 if (type
->byref
&& type
->type
!= MONO_TYPE_TYPEDBYREF
) {
1666 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode
, ctx
->ip_offset
));
1670 if (type
->type
== MONO_TYPE_VOID
) {
1671 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode
, ctx
->ip_offset
));
1675 if (type
->type
== MONO_TYPE_TYPEDBYREF
)
1676 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode
, ctx
->ip_offset
));
1678 if (!(klass
= mono_class_from_mono_type (type
)))
1679 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode
, ctx
->ip_offset
));
1681 if (mono_class_is_gtd (klass
) && type
->type
!= MONO_TYPE_GENERICINST
)
1682 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use the generic type definition in a boxable type position for %s at 0x%04x", opcode
, ctx
->ip_offset
));
1684 check_unverifiable_type (ctx
, type
);
1689 /*operation result tables */
1691 static const unsigned char bin_op_table
[TYPE_MAX
][TYPE_MAX
] = {
1692 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1693 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1694 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1695 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_R8
, TYPE_INV
, TYPE_INV
},
1696 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1697 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1700 static const unsigned char add_table
[TYPE_MAX
][TYPE_MAX
] = {
1701 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1702 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1703 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1704 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_R8
, TYPE_INV
, TYPE_INV
},
1705 {TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1706 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1709 static const unsigned char sub_table
[TYPE_MAX
][TYPE_MAX
] = {
1710 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1711 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1712 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1713 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_R8
, TYPE_INV
, TYPE_INV
},
1714 {TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_NATIVE_INT
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1715 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1718 static const unsigned char int_bin_op_table
[TYPE_MAX
][TYPE_MAX
] = {
1719 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1720 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1721 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1722 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1723 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1724 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1727 static const unsigned char shift_op_table
[TYPE_MAX
][TYPE_MAX
] = {
1728 {TYPE_I4
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1729 {TYPE_I8
, TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1730 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1731 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1732 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1733 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1736 static const unsigned char cmp_br_op
[TYPE_MAX
][TYPE_MAX
] = {
1737 {TYPE_I4
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1738 {TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1739 {TYPE_I4
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1740 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
},
1741 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_I4
, TYPE_INV
},
1742 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1745 static const unsigned char cmp_br_eq_op
[TYPE_MAX
][TYPE_MAX
] = {
1746 {TYPE_I4
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1747 {TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1748 {TYPE_I4
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_I4
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1749 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_I4
, TYPE_INV
, TYPE_INV
},
1750 {TYPE_INV
, TYPE_INV
, TYPE_I4
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_I4
, TYPE_INV
},
1751 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_I4
},
1754 static const unsigned char add_ovf_un_table
[TYPE_MAX
][TYPE_MAX
] = {
1755 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1756 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1757 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1758 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1759 {TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1760 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1763 static const unsigned char sub_ovf_un_table
[TYPE_MAX
][TYPE_MAX
] = {
1764 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1765 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1766 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1767 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1768 {TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_PTR
| NON_VERIFIABLE_RESULT
, TYPE_INV
, TYPE_NATIVE_INT
| NON_VERIFIABLE_RESULT
, TYPE_INV
},
1769 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1772 static const unsigned char bin_ovf_table
[TYPE_MAX
][TYPE_MAX
] = {
1773 {TYPE_I4
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1774 {TYPE_INV
, TYPE_I8
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1775 {TYPE_NATIVE_INT
, TYPE_INV
, TYPE_NATIVE_INT
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1776 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1777 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1778 {TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
, TYPE_INV
},
1781 #ifdef MONO_VERIFIER_DEBUG
1785 dump_stack_value (ILStackDesc
*value
)
1787 printf ("[(%x)(%x)", value
->type
->type
, value
->stype
);
1789 if (stack_slot_is_this_pointer (value
))
1792 if (stack_slot_is_boxed_value (value
))
1793 printf ("[boxed] ");
1795 if (stack_slot_is_null_literal (value
))
1798 if (stack_slot_is_managed_mutability_pointer (value
))
1799 printf ("Controled Mutability MP: ");
1801 if (stack_slot_is_managed_pointer (value
))
1802 printf ("Managed Pointer to: ");
1804 switch (stack_slot_get_underlying_type (value
)) {
1806 printf ("invalid type]");
1814 case TYPE_NATIVE_INT
:
1815 printf ("native int]");
1818 printf ("float64]");
1821 printf ("unmanaged pointer]");
1824 switch (value
->type
->type
) {
1825 case MONO_TYPE_CLASS
:
1826 case MONO_TYPE_VALUETYPE
:
1827 printf ("complex] (%s)", value
->type
->data
.klass
->name
);
1829 case MONO_TYPE_STRING
:
1830 printf ("complex] (string)");
1832 case MONO_TYPE_OBJECT
:
1833 printf ("complex] (object)");
1835 case MONO_TYPE_SZARRAY
:
1836 printf ("complex] (%s [])", value
->type
->data
.klass
->name
);
1838 case MONO_TYPE_ARRAY
:
1839 printf ("complex] (%s [%d %d %d])",
1840 value
->type
->data
.array
->eklass
->name
,
1841 value
->type
->data
.array
->rank
,
1842 value
->type
->data
.array
->numsizes
,
1843 value
->type
->data
.array
->numlobounds
);
1845 case MONO_TYPE_GENERICINST
:
1846 printf ("complex] (inst of %s )", value
->type
->data
.generic_class
->container_class
->name
);
1849 printf ("complex] (type generic param !%d - %s) ", value
->type
->data
.generic_param
->num
, mono_generic_param_info (value
->type
->data
.generic_param
)->name
);
1851 case MONO_TYPE_MVAR
:
1852 printf ("complex] (method generic param !!%d - %s) ", value
->type
->data
.generic_param
->num
, mono_generic_param_info (value
->type
->data
.generic_param
)->name
);
1855 //should be a boxed value
1856 char * name
= mono_type_full_name (value
->type
);
1857 printf ("complex] %s", name
);
1863 printf ("unknown stack %x type]\n", value
->stype
);
1864 g_assert_not_reached ();
1869 dump_stack_state (ILCodeDesc
*state
)
1873 printf ("(%d) ", state
->size
);
1874 for (i
= 0; i
< state
->size
; ++i
)
1875 dump_stack_value (state
->stack
+ i
);
1881 * is_array_type_compatible:
1883 * Returns TRUE if candidate array type can be assigned to target.
1885 * Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1888 is_array_type_compatible (MonoType
*target
, MonoType
*candidate
)
1890 MonoArrayType
*left
= target
->data
.array
;
1891 MonoArrayType
*right
= candidate
->data
.array
;
1893 g_assert (target
->type
== MONO_TYPE_ARRAY
);
1894 g_assert (candidate
->type
== MONO_TYPE_ARRAY
);
1896 if (left
->rank
!= right
->rank
)
1899 return verifier_class_is_assignable_from (left
->eklass
, right
->eklass
);
1903 get_stack_type (MonoType
*type
)
1906 int type_kind
= type
->type
;
1908 mask
= POINTER_MASK
;
1909 /*TODO handle CMMP_MASK */
1912 switch (type_kind
) {
1915 case MONO_TYPE_BOOLEAN
:
1918 case MONO_TYPE_CHAR
:
1921 return TYPE_I4
| mask
;
1925 return TYPE_NATIVE_INT
| mask
;
1927 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1928 case MONO_TYPE_FNPTR
:
1930 case MONO_TYPE_TYPEDBYREF
:
1931 return TYPE_PTR
| mask
;
1934 case MONO_TYPE_MVAR
:
1936 case MONO_TYPE_CLASS
:
1937 case MONO_TYPE_STRING
:
1938 case MONO_TYPE_OBJECT
:
1939 case MONO_TYPE_SZARRAY
:
1940 case MONO_TYPE_ARRAY
:
1941 return TYPE_COMPLEX
| mask
;
1945 return TYPE_I8
| mask
;
1949 return TYPE_R8
| mask
;
1951 case MONO_TYPE_GENERICINST
:
1952 case MONO_TYPE_VALUETYPE
:
1953 if (mono_type_is_enum_type (type
)) {
1954 type
= mono_type_get_underlying_type_any (type
);
1957 type_kind
= type
->type
;
1960 return TYPE_COMPLEX
| mask
;
1968 /* convert MonoType to ILStackDesc format (stype) */
1970 set_stack_value (VerifyContext
*ctx
, ILStackDesc
*stack
, MonoType
*type
, int take_addr
)
1973 int type_kind
= type
->type
;
1975 if (type
->byref
|| take_addr
)
1976 mask
= POINTER_MASK
;
1977 /* TODO handle CMMP_MASK */
1982 switch (type_kind
) {
1985 case MONO_TYPE_BOOLEAN
:
1988 case MONO_TYPE_CHAR
:
1991 stack
->stype
= TYPE_I4
| mask
;
1995 stack
->stype
= TYPE_NATIVE_INT
| mask
;
1998 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
1999 case MONO_TYPE_FNPTR
:
2001 case MONO_TYPE_TYPEDBYREF
:
2002 stack
->stype
= TYPE_PTR
| mask
;
2005 case MONO_TYPE_CLASS
:
2006 case MONO_TYPE_STRING
:
2007 case MONO_TYPE_OBJECT
:
2008 case MONO_TYPE_SZARRAY
:
2009 case MONO_TYPE_ARRAY
:
2012 case MONO_TYPE_MVAR
:
2013 stack
->stype
= TYPE_COMPLEX
| mask
;
2018 stack
->stype
= TYPE_I8
| mask
;
2022 stack
->stype
= TYPE_R8
| mask
;
2024 case MONO_TYPE_GENERICINST
:
2025 case MONO_TYPE_VALUETYPE
:
2026 if (mono_type_is_enum_type (type
)) {
2027 MonoType
*utype
= mono_type_get_underlying_type_any (type
);
2029 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Could not resolve underlying type of %x at %d", type
->type
, ctx
->ip_offset
));
2033 type_kind
= type
->type
;
2036 stack
->stype
= TYPE_COMPLEX
| mask
;
2040 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type
->type
); );
2041 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type
->type
, ctx
->ip_offset
));
2048 * init_stack_with_value_at_exception_boundary:
2050 * Initialize the stack and push a given type.
2051 * The instruction is marked as been on the exception boundary.
2054 init_stack_with_value_at_exception_boundary (VerifyContext
*ctx
, ILCodeDesc
*code
, MonoClass
*klass
)
2057 MonoType
*type
= mono_class_inflate_generic_type_checked (&klass
->byval_arg
, ctx
->generic_context
, &error
);
2059 if (!mono_error_ok (&error
)) {
2060 char *name
= mono_type_get_full_name (klass
);
2061 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid class %s used for exception", name
));
2063 mono_error_cleanup (&error
);
2067 if (!ctx
->max_stack
) {
2068 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Stack overflow at 0x%04x", ctx
->ip_offset
));
2072 stack_init (ctx
, code
);
2073 ensure_stack_size (code
, 1);
2074 set_stack_value (ctx
, code
->stack
, type
, FALSE
);
2075 ctx
->exception_types
= g_slist_prepend (ctx
->exception_types
, type
);
2077 code
->flags
|= IL_CODE_FLAG_WAS_TARGET
;
2078 if (mono_type_is_generic_argument (type
))
2079 code
->stack
->stype
|= BOXED_MASK
;
2081 /* Class lazy loading functions */
2082 static GENERATE_GET_CLASS_WITH_CACHE (ienumerable
, "System.Collections.Generic", "IEnumerable`1")
2083 static GENERATE_GET_CLASS_WITH_CACHE (icollection
, "System.Collections.Generic", "ICollection`1")
2084 static GENERATE_GET_CLASS_WITH_CACHE (ireadonly_list
, "System.Collections.Generic", "IReadOnlyList`1")
2085 static GENERATE_GET_CLASS_WITH_CACHE (ireadonly_collection
, "System.Collections.Generic", "IReadOnlyCollection`1")
2089 get_ienumerable_class (void)
2091 return mono_class_get_ienumerable_class ();
2095 get_icollection_class (void)
2097 return mono_class_get_icollection_class ();
2101 get_ireadonlylist_class (void)
2103 return mono_class_get_ireadonly_list_class ();
2107 get_ireadonlycollection_class (void)
2109 return mono_class_get_ireadonly_collection_class ();
2113 inflate_class_one_arg (MonoClass
*gtype
, MonoClass
*arg0
)
2116 args
[0] = &arg0
->byval_arg
;
2118 return mono_class_bind_generic_parameters (gtype
, 1, args
, FALSE
);
2122 verifier_inflate_and_check_compat (MonoClass
*target
, MonoClass
*gtd
, MonoClass
*arg
)
2125 if (!(tmp
= inflate_class_one_arg (gtd
, arg
)))
2127 if (mono_class_is_variant_compatible (target
, tmp
, TRUE
))
2133 verifier_class_is_assignable_from (MonoClass
*target
, MonoClass
*candidate
)
2135 MonoClass
*iface_gtd
;
2137 if (target
== candidate
)
2140 if (mono_class_has_variant_generic_params (target
)) {
2141 if (MONO_CLASS_IS_INTERFACE (target
)) {
2142 if (MONO_CLASS_IS_INTERFACE (candidate
) && mono_class_is_variant_compatible (target
, candidate
, TRUE
))
2145 if (candidate
->rank
== 1) {
2146 if (verifier_inflate_and_check_compat (target
, mono_defaults
.generic_ilist_class
, candidate
->element_class
))
2148 if (verifier_inflate_and_check_compat (target
, get_icollection_class (), candidate
->element_class
))
2150 if (verifier_inflate_and_check_compat (target
, get_ienumerable_class (), candidate
->element_class
))
2152 if (verifier_inflate_and_check_compat (target
, get_ireadonlylist_class (), candidate
->element_class
))
2154 if (verifier_inflate_and_check_compat (target
, get_ireadonlycollection_class (), candidate
->element_class
))
2159 while (candidate
&& candidate
!= mono_defaults
.object_class
) {
2160 mono_class_setup_interfaces (candidate
, &error
);
2161 if (!mono_error_ok (&error
)) {
2162 mono_error_cleanup (&error
);
2166 /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
2167 for (i
= 0; i
< candidate
->interface_offsets_count
; ++i
) {
2168 MonoClass
*iface
= candidate
->interfaces_packed
[i
];
2169 if (mono_class_is_variant_compatible (target
, iface
, TRUE
))
2173 for (i
= 0; i
< candidate
->interface_count
; ++i
) {
2174 MonoClass
*iface
= candidate
->interfaces
[i
];
2175 if (mono_class_is_variant_compatible (target
, iface
, TRUE
))
2178 candidate
= candidate
->parent
;
2181 } else if (target
->delegate
) {
2182 if (mono_class_is_variant_compatible (target
, candidate
, TRUE
))
2188 if (mono_class_is_assignable_from (target
, candidate
))
2191 if (!MONO_CLASS_IS_INTERFACE (target
) || !mono_class_is_ginst (target
) || candidate
->rank
!= 1)
2194 iface_gtd
= mono_class_get_generic_class (target
)->container_class
;
2195 if (iface_gtd
!= mono_defaults
.generic_ilist_class
&& iface_gtd
!= get_icollection_class () && iface_gtd
!= get_ienumerable_class ())
2198 target
= mono_class_from_mono_type (mono_class_get_generic_class (target
)->context
.class_inst
->type_argv
[0]);
2199 candidate
= candidate
->element_class
;
2204 /*Verify if type 'candidate' can be stored in type 'target'.
2206 * If strict, check for the underlying type and not the verification stack types
2209 verify_type_compatibility_full (VerifyContext
*ctx
, MonoType
*target
, MonoType
*candidate
, gboolean strict
)
2211 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2212 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2214 MonoType
*original_candidate
= candidate
;
2215 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target
), mono_type_full_name (candidate
), strict
); );
2217 /*only one is byref */
2218 if (candidate
->byref
^ target
->byref
) {
2219 /* converting from native int to byref*/
2220 if (get_stack_type (candidate
) == TYPE_NATIVE_INT
&& target
->byref
) {
2221 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("using byref native int at 0x%04x", ctx
->ip_offset
));
2226 strict
|= target
->byref
;
2227 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2228 candidate
= mono_type_get_underlying_type_any (candidate
);
2231 switch (target
->type
) {
2232 case MONO_TYPE_VOID
:
2233 return candidate
->type
== MONO_TYPE_VOID
;
2236 case MONO_TYPE_BOOLEAN
:
2238 return IS_ONE_OF3 (candidate
->type
, MONO_TYPE_I1
, MONO_TYPE_U1
, MONO_TYPE_BOOLEAN
);
2241 case MONO_TYPE_CHAR
:
2243 return IS_ONE_OF3 (candidate
->type
, MONO_TYPE_I2
, MONO_TYPE_U2
, MONO_TYPE_CHAR
);
2245 case MONO_TYPE_U4
: {
2246 gboolean is_native_int
= IS_ONE_OF2 (candidate
->type
, MONO_TYPE_I
, MONO_TYPE_U
);
2247 gboolean is_int4
= IS_ONE_OF2 (candidate
->type
, MONO_TYPE_I4
, MONO_TYPE_U4
);
2249 return is_native_int
|| is_int4
;
2250 return is_native_int
|| get_stack_type (candidate
) == TYPE_I4
;
2255 return IS_ONE_OF2 (candidate
->type
, MONO_TYPE_I8
, MONO_TYPE_U8
);
2260 return candidate
->type
== target
->type
;
2261 return IS_ONE_OF2 (candidate
->type
, MONO_TYPE_R4
, MONO_TYPE_R8
);
2265 gboolean is_native_int
= IS_ONE_OF2 (candidate
->type
, MONO_TYPE_I
, MONO_TYPE_U
);
2266 gboolean is_int4
= IS_ONE_OF2 (candidate
->type
, MONO_TYPE_I4
, MONO_TYPE_U4
);
2268 return is_native_int
|| is_int4
;
2269 return is_native_int
|| get_stack_type (candidate
) == TYPE_I4
;
2273 if (candidate
->type
!= MONO_TYPE_PTR
)
2275 /* check the underlying type */
2276 return verify_type_compatibility_full (ctx
, target
->data
.type
, candidate
->data
.type
, TRUE
);
2278 case MONO_TYPE_FNPTR
: {
2279 MonoMethodSignature
*left
, *right
;
2280 if (candidate
->type
!= MONO_TYPE_FNPTR
)
2283 left
= mono_type_get_signature (target
);
2284 right
= mono_type_get_signature (candidate
);
2285 return mono_metadata_signature_equal (left
, right
) && left
->call_convention
== right
->call_convention
;
2288 case MONO_TYPE_GENERICINST
: {
2289 MonoClass
*target_klass
;
2290 MonoClass
*candidate_klass
;
2291 if (mono_type_is_enum_type (target
)) {
2292 target
= mono_type_get_underlying_type_any (target
);
2298 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2299 * to take boxing status into account.
2301 if (mono_type_is_generic_argument (original_candidate
))
2304 target_klass
= mono_class_from_mono_type (target
);
2305 candidate_klass
= mono_class_from_mono_type (candidate
);
2306 if (mono_class_is_nullable (target_klass
)) {
2307 if (!mono_class_is_nullable (candidate_klass
))
2309 return target_klass
== candidate_klass
;
2311 return verifier_class_is_assignable_from (target_klass
, candidate_klass
);
2314 case MONO_TYPE_STRING
:
2315 return candidate
->type
== MONO_TYPE_STRING
;
2317 case MONO_TYPE_CLASS
:
2319 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2320 * to take boxing status into account.
2322 if (mono_type_is_generic_argument (original_candidate
))
2325 if (candidate
->type
== MONO_TYPE_VALUETYPE
)
2328 /* If candidate is an enum it should return true for System.Enum and supertypes.
2329 * That's why here we use the original type and not the underlying type.
2331 return verifier_class_is_assignable_from (target
->data
.klass
, mono_class_from_mono_type (original_candidate
));
2333 case MONO_TYPE_OBJECT
:
2334 return MONO_TYPE_IS_REFERENCE (candidate
);
2336 case MONO_TYPE_SZARRAY
: {
2339 if (candidate
->type
!= MONO_TYPE_SZARRAY
)
2342 left
= mono_class_from_mono_type (target
);
2343 right
= mono_class_from_mono_type (candidate
);
2345 return verifier_class_is_assignable_from (left
, right
);
2348 case MONO_TYPE_ARRAY
:
2349 if (candidate
->type
!= MONO_TYPE_ARRAY
)
2351 return is_array_type_compatible (target
, candidate
);
2353 case MONO_TYPE_TYPEDBYREF
:
2354 return candidate
->type
== MONO_TYPE_TYPEDBYREF
;
2356 case MONO_TYPE_VALUETYPE
: {
2357 MonoClass
*target_klass
;
2358 MonoClass
*candidate_klass
;
2360 if (candidate
->type
== MONO_TYPE_CLASS
)
2363 target_klass
= mono_class_from_mono_type (target
);
2364 candidate_klass
= mono_class_from_mono_type (candidate
);
2365 if (target_klass
== candidate_klass
)
2367 if (mono_type_is_enum_type (target
)) {
2368 target
= mono_type_get_underlying_type_any (target
);
2377 if (candidate
->type
!= MONO_TYPE_VAR
)
2379 return mono_type_get_generic_param_num (candidate
) == mono_type_get_generic_param_num (target
);
2381 case MONO_TYPE_MVAR
:
2382 if (candidate
->type
!= MONO_TYPE_MVAR
)
2384 return mono_type_get_generic_param_num (candidate
) == mono_type_get_generic_param_num (target
);
2387 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target
->type
); );
2388 g_assert_not_reached ();
2397 verify_type_compatibility (VerifyContext
*ctx
, MonoType
*target
, MonoType
*candidate
)
2399 return verify_type_compatibility_full (ctx
, target
, candidate
, FALSE
);
2403 * Returns the generic param bound to the context been verified.
2406 static MonoGenericParam
*
2407 get_generic_param (VerifyContext
*ctx
, MonoType
*param
)
2409 guint16 param_num
= mono_type_get_generic_param_num (param
);
2410 if (param
->type
== MONO_TYPE_VAR
) {
2411 if (!ctx
->generic_context
->class_inst
|| ctx
->generic_context
->class_inst
->type_argc
<= param_num
) {
2412 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid generic type argument %d", param_num
));
2415 return ctx
->generic_context
->class_inst
->type_argv
[param_num
]->data
.generic_param
;
2418 /*param must be a MVAR */
2419 if (!ctx
->generic_context
->method_inst
|| ctx
->generic_context
->method_inst
->type_argc
<= param_num
) {
2420 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid generic method argument %d", param_num
));
2423 return ctx
->generic_context
->method_inst
->type_argv
[param_num
]->data
.generic_param
;
2428 recursive_boxed_constraint_type_check (VerifyContext
*ctx
, MonoType
*type
, MonoClass
*constraint_class
, int recursion_level
)
2430 MonoType
*constraint_type
= &constraint_class
->byval_arg
;
2431 if (recursion_level
<= 0)
2434 if (verify_type_compatibility_full (ctx
, type
, mono_type_get_type_byval (constraint_type
), FALSE
))
2437 if (mono_type_is_generic_argument (constraint_type
)) {
2438 MonoGenericParam
*param
= get_generic_param (ctx
, constraint_type
);
2442 for (klass
= mono_generic_param_info (param
)->constraints
; klass
&& *klass
; ++klass
) {
2443 if (recursive_boxed_constraint_type_check (ctx
, type
, *klass
, recursion_level
- 1))
2451 * is_compatible_boxed_valuetype:
2453 * Returns: TRUE if @candidate / @stack is a valid boxed valuetype.
2455 * @type The source type. It it tested to be of the proper type.
2456 * @candidate type of the boxed valuetype.
2457 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2458 * @strict if TRUE candidate must be boxed compatible to the target type
2462 is_compatible_boxed_valuetype (VerifyContext
*ctx
, MonoType
*type
, MonoType
*candidate
, ILStackDesc
*stack
, gboolean strict
)
2464 if (!stack_slot_is_boxed_value (stack
))
2466 if (type
->byref
|| candidate
->byref
)
2469 if (mono_type_is_generic_argument (candidate
)) {
2470 MonoGenericParam
*param
= get_generic_param (ctx
, candidate
);
2475 for (klass
= mono_generic_param_info (param
)->constraints
; klass
&& *klass
; ++klass
) {
2476 /*256 should be enough since there can't be more than 255 generic arguments.*/
2477 if (recursive_boxed_constraint_type_check (ctx
, type
, *klass
, 256))
2482 if (mono_type_is_generic_argument (type
))
2488 return MONO_TYPE_IS_REFERENCE (type
) && verifier_class_is_assignable_from (mono_class_from_mono_type (type
), mono_class_from_mono_type (candidate
));
2492 verify_stack_type_compatibility_full (VerifyContext
*ctx
, MonoType
*type
, ILStackDesc
*stack
, gboolean drop_byref
, gboolean valuetype_must_be_boxed
)
2494 MonoType
*candidate
= mono_type_from_stack_slot (stack
);
2495 if (MONO_TYPE_IS_REFERENCE (type
) && !type
->byref
&& stack_slot_is_null_literal (stack
))
2498 if (is_compatible_boxed_valuetype (ctx
, type
, candidate
, stack
, TRUE
))
2501 if (valuetype_must_be_boxed
&& !stack_slot_is_boxed_value (stack
) && !MONO_TYPE_IS_REFERENCE (candidate
))
2504 if (!valuetype_must_be_boxed
&& stack_slot_is_boxed_value (stack
))
2508 return verify_type_compatibility_full (ctx
, type
, mono_type_get_type_byval (candidate
), FALSE
);
2510 /* Handle how Roslyn emit fixed statements by encoding it as byref */
2511 if (type
->byref
&& candidate
->byref
&& (type
->type
== MONO_TYPE_I
) && !mono_type_is_reference (candidate
)) {
2512 if (!IS_STRICT_MODE (ctx
))
2516 return verify_type_compatibility_full (ctx
, type
, candidate
, FALSE
);
2520 verify_stack_type_compatibility (VerifyContext
*ctx
, MonoType
*type
, ILStackDesc
*stack
)
2522 return verify_stack_type_compatibility_full (ctx
, type
, stack
, FALSE
, FALSE
);
2526 mono_delegate_type_equal (MonoType
*target
, MonoType
*candidate
)
2528 if (candidate
->byref
^ target
->byref
)
2531 switch (target
->type
) {
2532 case MONO_TYPE_VOID
:
2535 case MONO_TYPE_BOOLEAN
:
2538 case MONO_TYPE_CHAR
:
2547 case MONO_TYPE_STRING
:
2548 case MONO_TYPE_TYPEDBYREF
:
2549 return candidate
->type
== target
->type
;
2552 if (candidate
->type
!= MONO_TYPE_PTR
)
2554 return mono_delegate_type_equal (target
->data
.type
, candidate
->data
.type
);
2556 case MONO_TYPE_FNPTR
:
2557 if (candidate
->type
!= MONO_TYPE_FNPTR
)
2559 return mono_delegate_signature_equal (mono_type_get_signature (target
), mono_type_get_signature (candidate
), FALSE
);
2561 case MONO_TYPE_GENERICINST
: {
2562 MonoClass
*target_klass
;
2563 MonoClass
*candidate_klass
;
2564 target_klass
= mono_class_from_mono_type (target
);
2565 candidate_klass
= mono_class_from_mono_type (candidate
);
2566 /*FIXME handle nullables and enum*/
2567 return verifier_class_is_assignable_from (target_klass
, candidate_klass
);
2569 case MONO_TYPE_OBJECT
:
2570 return MONO_TYPE_IS_REFERENCE (candidate
);
2572 case MONO_TYPE_CLASS
:
2573 return verifier_class_is_assignable_from(target
->data
.klass
, mono_class_from_mono_type (candidate
));
2575 case MONO_TYPE_SZARRAY
:
2576 if (candidate
->type
!= MONO_TYPE_SZARRAY
)
2578 return verifier_class_is_assignable_from (mono_class_from_mono_type (target
)->element_class
, mono_class_from_mono_type (candidate
)->element_class
);
2580 case MONO_TYPE_ARRAY
:
2581 if (candidate
->type
!= MONO_TYPE_ARRAY
)
2583 return is_array_type_compatible (target
, candidate
);
2585 case MONO_TYPE_VALUETYPE
:
2586 /*FIXME handle nullables and enum*/
2587 return mono_class_from_mono_type (candidate
) == mono_class_from_mono_type (target
);
2590 return candidate
->type
== MONO_TYPE_VAR
&& mono_type_get_generic_param_num (target
) == mono_type_get_generic_param_num (candidate
);
2593 case MONO_TYPE_MVAR
:
2594 return candidate
->type
== MONO_TYPE_MVAR
&& mono_type_get_generic_param_num (target
) == mono_type_get_generic_param_num (candidate
);
2598 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target
->type
); );
2599 g_assert_not_reached ();
2605 mono_delegate_param_equal (MonoType
*delegate
, MonoType
*method
)
2607 if (mono_metadata_type_equal_full (delegate
, method
, TRUE
))
2610 return mono_delegate_type_equal (method
, delegate
);
2614 mono_delegate_ret_equal (MonoType
*delegate
, MonoType
*method
)
2616 if (mono_metadata_type_equal_full (delegate
, method
, TRUE
))
2619 return mono_delegate_type_equal (delegate
, method
);
2623 * mono_delegate_signature_equal:
2625 * Compare two signatures in the way expected by delegates.
2627 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2629 * FIXME can this function be eliminated and proper metadata functionality be used?
2632 mono_delegate_signature_equal (MonoMethodSignature
*delegate_sig
, MonoMethodSignature
*method_sig
, gboolean is_static_ldftn
)
2635 int method_offset
= is_static_ldftn
? 1 : 0;
2637 if (delegate_sig
->param_count
+ method_offset
!= method_sig
->param_count
)
2640 if (delegate_sig
->call_convention
!= method_sig
->call_convention
)
2643 for (i
= 0; i
< delegate_sig
->param_count
; i
++) {
2644 MonoType
*p1
= delegate_sig
->params
[i
];
2645 MonoType
*p2
= method_sig
->params
[i
+ method_offset
];
2647 if (!mono_delegate_param_equal (p1
, p2
))
2651 if (!mono_delegate_ret_equal (delegate_sig
->ret
, method_sig
->ret
))
2658 mono_verifier_is_signature_compatible (MonoMethodSignature
*target
, MonoMethodSignature
*candidate
)
2660 return mono_delegate_signature_equal (target
, candidate
, FALSE
);
2664 * verify_ldftn_delegate:
2666 * Verify properties of ldftn based delegates.
2669 verify_ldftn_delegate (VerifyContext
*ctx
, MonoClass
*delegate
, ILStackDesc
*value
, ILStackDesc
*funptr
)
2671 MonoMethod
*method
= funptr
->method
;
2673 /*ldftn non-final virtuals only allowed if method is not static,
2674 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2675 * This rules doesn't apply if the object on stack is a boxed valuetype.
2677 if ((method
->flags
& METHOD_ATTRIBUTE_VIRTUAL
) && !(method
->flags
& METHOD_ATTRIBUTE_FINAL
) && !mono_class_is_sealed (method
->klass
) && !stack_slot_is_boxed_value (value
)) {
2678 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2679 if (IS_FAIL_FAST_MODE (ctx
) && ctx
->has_this_store
)
2680 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx
->ip_offset
));
2682 /*current method must not be static*/
2683 if (ctx
->method
->flags
& METHOD_ATTRIBUTE_STATIC
)
2684 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx
->ip_offset
));
2686 /*value is the this pointer, loaded using ldarg.0 */
2687 if (!stack_slot_is_this_pointer (value
))
2688 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid object argument, it is not the this pointer, to ldftn with virtual method at 0x%04x", ctx
->ip_offset
));
2690 ctx
->code
[ctx
->ip_offset
].flags
|= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL
;
2695 * verify_delegate_compatibility:
2697 * Verify delegate creation sequence.
2701 verify_delegate_compatibility (VerifyContext
*ctx
, MonoClass
*delegate
, ILStackDesc
*value
, ILStackDesc
*funptr
)
2703 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2704 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2706 MonoMethod
*invoke
, *method
;
2707 const guint8
*ip
= ctx
->header
->code
;
2708 guint32 ip_offset
= ctx
->ip_offset
;
2709 gboolean is_static_ldftn
= FALSE
, is_first_arg_bound
= FALSE
;
2711 if (stack_slot_get_type (funptr
) != TYPE_PTR
|| !funptr
->method
) {
2712 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx
->ip_offset
));
2716 invoke
= mono_get_delegate_invoke (delegate
);
2717 method
= funptr
->method
;
2719 if (!method
|| !mono_method_signature (method
)) {
2720 char *name
= mono_type_get_full_name (delegate
);
2721 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name
, ctx
->ip_offset
));
2726 if (!invoke
|| !mono_method_signature (invoke
)) {
2727 char *name
= mono_type_get_full_name (delegate
);
2728 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name
, ctx
->ip_offset
));
2733 is_static_ldftn
= (ip_offset
> 5 && IS_LOAD_FUN_PTR (CEE_LDFTN
)) && method
->flags
& METHOD_ATTRIBUTE_STATIC
;
2735 if (is_static_ldftn
)
2736 is_first_arg_bound
= mono_method_signature (invoke
)->param_count
+ 1 == mono_method_signature (method
)->param_count
;
2738 if (!mono_delegate_signature_equal (mono_method_signature (invoke
), mono_method_signature (method
), is_first_arg_bound
)) {
2739 char *fun_sig
= mono_signature_get_desc (mono_method_signature (method
), FALSE
);
2740 char *invoke_sig
= mono_signature_get_desc (mono_method_signature (invoke
), FALSE
);
2741 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Function pointer signature '%s' doesn't match delegate's signature '%s' at 0x%04x", fun_sig
, invoke_sig
, ctx
->ip_offset
));
2743 g_free (invoke_sig
);
2747 * Delegate code sequences:
2753 * [-6] ldvirtftn token
2757 if (ip_offset
> 5 && IS_LOAD_FUN_PTR (CEE_LDFTN
)) {
2758 verify_ldftn_delegate (ctx
, delegate
, value
, funptr
);
2759 } else if (ip_offset
> 6 && IS_VALID_OPCODE (7, CEE_DUP
) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN
)) {
2760 ctx
->code
[ip_offset
- 6].flags
|= IL_CODE_DELEGATE_SEQUENCE
;
2762 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx
->ip_offset
));
2764 ctx
->code
[ip_offset
].flags
|= IL_CODE_DELEGATE_SEQUENCE
;
2767 if (is_first_arg_bound
) {
2768 if (mono_method_signature (method
)->param_count
== 0 || !verify_stack_type_compatibility_full (ctx
, mono_method_signature (method
)->params
[0], value
, FALSE
, TRUE
))
2769 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx
->ip_offset
));
2771 if (method
->flags
& METHOD_ATTRIBUTE_STATIC
) {
2772 if (!stack_slot_is_null_literal (value
))
2773 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx
->ip_offset
));
2775 if (!verify_stack_type_compatibility_full (ctx
, &method
->klass
->byval_arg
, value
, FALSE
, TRUE
) && !stack_slot_is_null_literal (value
))
2776 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx
->ip_offset
));
2780 if (stack_slot_get_type (value
) != TYPE_COMPLEX
)
2781 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx
->ip_offset
));
2783 #undef IS_VALID_OPCODE
2784 #undef IS_LOAD_FUN_PTR
2787 /* implement the opcode checks*/
2789 push_arg (VerifyContext
*ctx
, unsigned int arg
, int take_addr
)
2793 if (arg
>= ctx
->max_args
) {
2795 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Method doesn't have argument %d", arg
+ 1));
2797 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Method doesn't have argument %d", arg
+ 1));
2798 if (check_overflow (ctx
)) //FIXME: what sane value could we ever push?
2799 stack_push_val (ctx
, TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
2801 } else if (check_overflow (ctx
)) {
2802 /*We must let the value be pushed, otherwise we would get an underflow error*/
2803 check_unverifiable_type (ctx
, ctx
->params
[arg
]);
2804 if (ctx
->params
[arg
]->byref
&& take_addr
)
2805 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx
->ip_offset
));
2806 top
= stack_push (ctx
);
2807 if (!set_stack_value (ctx
, top
, ctx
->params
[arg
], take_addr
))
2810 if (arg
== 0 && !(ctx
->method
->flags
& METHOD_ATTRIBUTE_STATIC
)) {
2812 ctx
->has_this_store
= TRUE
;
2814 top
->stype
|= THIS_POINTER_MASK
;
2815 if (mono_method_is_constructor (ctx
->method
) && !ctx
->super_ctor_called
&& !ctx
->method
->klass
->valuetype
)
2816 top
->stype
|= UNINIT_THIS_MASK
;
2822 push_local (VerifyContext
*ctx
, guint32 arg
, int take_addr
)
2824 if (arg
>= ctx
->num_locals
) {
2825 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Method doesn't have local %d", arg
+ 1));
2826 } else if (check_overflow (ctx
)) {
2827 /*We must let the value be pushed, otherwise we would get an underflow error*/
2828 check_unverifiable_type (ctx
, ctx
->locals
[arg
]);
2829 if (ctx
->locals
[arg
]->byref
&& take_addr
)
2830 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx
->ip_offset
));
2832 set_stack_value (ctx
, stack_push (ctx
), ctx
->locals
[arg
], take_addr
);
2837 store_arg (VerifyContext
*ctx
, guint32 arg
)
2841 if (arg
>= ctx
->max_args
) {
2842 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg
+ 1, ctx
->ip_offset
));
2843 if (check_underflow (ctx
, 1))
2848 if (check_underflow (ctx
, 1)) {
2849 value
= stack_pop (ctx
);
2850 if (!verify_stack_type_compatibility (ctx
, ctx
->params
[arg
], value
)) {
2851 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
2854 if (arg
== 0 && !(ctx
->method
->flags
& METHOD_ATTRIBUTE_STATIC
))
2855 ctx
->has_this_store
= 1;
2859 store_local (VerifyContext
*ctx
, guint32 arg
)
2862 if (arg
>= ctx
->num_locals
) {
2863 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg
+ 1, ctx
->ip_offset
));
2867 /*TODO verify definite assigment */
2868 if (!check_underflow (ctx
, 1))
2871 value
= stack_pop (ctx
);
2872 if (ctx
->locals
[arg
]->byref
&& stack_slot_is_managed_mutability_pointer (value
))
2873 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly managed reference when storing on a local variable at 0x%04x", ctx
->ip_offset
));
2875 if (!verify_stack_type_compatibility (ctx
, ctx
->locals
[arg
], value
)) {
2876 char *expected
= mono_type_full_name (ctx
->locals
[arg
]);
2877 char *found
= stack_slot_full_name (value
);
2878 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2888 /*FIXME add and sub needs special care here*/
2890 do_binop (VerifyContext
*ctx
, unsigned int opcode
, const unsigned char table
[TYPE_MAX
][TYPE_MAX
])
2892 ILStackDesc
*a
, *b
, *top
;
2893 int idxa
, idxb
, complexMerge
= 0;
2896 if (!check_underflow (ctx
, 2))
2898 b
= stack_pop (ctx
);
2899 a
= stack_pop (ctx
);
2901 idxa
= stack_slot_get_underlying_type (a
);
2902 if (stack_slot_is_managed_pointer (a
)) {
2907 idxb
= stack_slot_get_underlying_type (b
);
2908 if (stack_slot_is_managed_pointer (b
)) {
2915 res
= table
[idxa
][idxb
];
2917 VERIFIER_DEBUG ( printf ("binop res %d\n", res
); );
2918 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa
, idxb
); );
2920 top
= stack_push (ctx
);
2921 if (res
== TYPE_INV
) {
2922 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Binary instruction applyed to ill formed stack (%s x %s)", stack_slot_get_name (a
), stack_slot_get_name (b
)));
2923 copy_stack_value (top
, a
);
2927 if (res
& NON_VERIFIABLE_RESULT
) {
2928 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Binary instruction is not verifiable (%s x %s)", stack_slot_get_name (a
), stack_slot_get_name (b
)));
2930 res
= res
& ~NON_VERIFIABLE_RESULT
;
2933 if (complexMerge
&& res
== TYPE_PTR
) {
2934 if (complexMerge
== 1)
2935 copy_stack_value (top
, a
);
2936 else if (complexMerge
== 2)
2937 copy_stack_value (top
, b
);
2939 * There is no need to merge the type of two pointers.
2940 * The only valid operation is subtraction, that returns a native
2941 * int as result and can be used with any 2 pointer kinds.
2942 * This is valid acording to Patition III 1.1.4
2951 do_boolean_branch_op (VerifyContext
*ctx
, int delta
)
2953 int target
= ctx
->ip_offset
+ delta
;
2956 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx
->ip_offset
, delta
, target
); );
2958 if (target
< 0 || target
>= ctx
->code_size
) {
2959 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx
->ip_offset
));
2963 switch (is_valid_branch_instruction (ctx
->header
, ctx
->ip_offset
, target
)) {
2965 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx
->ip_offset
));
2968 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx
->ip_offset
));
2972 ctx
->target
= target
;
2974 if (!check_underflow (ctx
, 1))
2977 top
= stack_pop (ctx
);
2978 if (!is_valid_bool_arg (top
))
2979 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Argument type %s not valid for brtrue/brfalse at 0x%04x", stack_slot_get_name (top
), ctx
->ip_offset
));
2981 check_unmanaged_pointer (ctx
, top
);
2985 stack_slot_is_complex_type_not_reference_type (ILStackDesc
*slot
)
2987 return stack_slot_get_type (slot
) == TYPE_COMPLEX
&& !MONO_TYPE_IS_REFERENCE (slot
->type
) && !stack_slot_is_boxed_value (slot
);
2991 stack_slot_is_reference_value (ILStackDesc
*slot
)
2993 return stack_slot_get_type (slot
) == TYPE_COMPLEX
&& (MONO_TYPE_IS_REFERENCE (slot
->type
) || stack_slot_is_boxed_value (slot
));
2997 do_branch_op (VerifyContext
*ctx
, signed int delta
, const unsigned char table
[TYPE_MAX
][TYPE_MAX
])
3002 int target
= ctx
->ip_offset
+ delta
;
3004 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx
->ip_offset
, delta
, target
); );
3006 if (target
< 0 || target
>= ctx
->code_size
) {
3007 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Branch target out of code at 0x%04x", ctx
->ip_offset
));
3011 switch (is_valid_cmp_branch_instruction (ctx
->header
, ctx
->ip_offset
, target
)) {
3012 case 1: /*FIXME use constants and not magic numbers.*/
3013 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx
->ip_offset
));
3016 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx
->ip_offset
));
3020 ctx
->target
= target
;
3022 if (!check_underflow (ctx
, 2))
3025 b
= stack_pop (ctx
);
3026 a
= stack_pop (ctx
);
3028 idxa
= stack_slot_get_underlying_type (a
);
3029 if (stack_slot_is_managed_pointer (a
))
3032 idxb
= stack_slot_get_underlying_type (b
);
3033 if (stack_slot_is_managed_pointer (b
))
3036 if (stack_slot_is_complex_type_not_reference_type (a
) || stack_slot_is_complex_type_not_reference_type (b
)) {
3041 res
= table
[idxa
][idxb
];
3044 VERIFIER_DEBUG ( printf ("branch res %d\n", res
); );
3045 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa
, idxb
); );
3047 if (res
== TYPE_INV
) {
3048 CODE_NOT_VERIFIABLE (ctx
,
3049 g_strdup_printf ("Compare and Branch instruction applyed to ill formed stack (%s x %s) at 0x%04x", stack_slot_get_name (a
), stack_slot_get_name (b
), ctx
->ip_offset
));
3050 } else if (res
& NON_VERIFIABLE_RESULT
) {
3051 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Compare and Branch instruction is not verifiable (%s x %s) at 0x%04x", stack_slot_get_name (a
), stack_slot_get_name (b
), ctx
->ip_offset
));
3052 res
= res
& ~NON_VERIFIABLE_RESULT
;
3057 do_cmp_op (VerifyContext
*ctx
, const unsigned char table
[TYPE_MAX
][TYPE_MAX
], guint32 opcode
)
3063 if (!check_underflow (ctx
, 2))
3065 b
= stack_pop (ctx
);
3066 a
= stack_pop (ctx
);
3068 if (opcode
== CEE_CGT_UN
) {
3069 if ((stack_slot_is_reference_value (a
) && stack_slot_is_null_literal (b
)) ||
3070 (stack_slot_is_reference_value (b
) && stack_slot_is_null_literal (a
))) {
3071 stack_push_val (ctx
, TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
3076 idxa
= stack_slot_get_underlying_type (a
);
3077 if (stack_slot_is_managed_pointer (a
))
3080 idxb
= stack_slot_get_underlying_type (b
);
3081 if (stack_slot_is_managed_pointer (b
))
3084 if (stack_slot_is_complex_type_not_reference_type (a
) || stack_slot_is_complex_type_not_reference_type (b
)) {
3089 res
= table
[idxa
][idxb
];
3092 if(res
== TYPE_INV
) {
3093 char *left_type
= stack_slot_full_name (a
);
3094 char *right_type
= stack_slot_full_name (b
);
3095 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf("Compare instruction applyed to ill formed stack (%s x %s) at 0x%04x", left_type
, right_type
, ctx
->ip_offset
));
3097 g_free (right_type
);
3098 } else if (res
& NON_VERIFIABLE_RESULT
) {
3099 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Compare instruction is not verifiable (%s x %s) at 0x%04x", stack_slot_get_name (a
), stack_slot_get_name (b
), ctx
->ip_offset
));
3100 res
= res
& ~NON_VERIFIABLE_RESULT
;
3102 stack_push_val (ctx
, TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
3106 do_ret (VerifyContext
*ctx
)
3108 MonoType
*ret
= ctx
->signature
->ret
;
3109 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3110 if (ret
->type
!= MONO_TYPE_VOID
) {
3112 if (!check_underflow (ctx
, 1))
3115 top
= stack_pop(ctx
);
3117 if (!verify_stack_type_compatibility (ctx
, ctx
->signature
->ret
, top
)) {
3118 char *ret_type
= mono_type_full_name (ctx
->signature
->ret
);
3119 char *stack_type
= stack_slot_full_name (top
);
3120 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible return value on stack with method signature, expected '%s' but got '%s' at 0x%04x", ret_type
, stack_type
, ctx
->ip_offset
));
3121 g_free (stack_type
);
3126 if (ret
->byref
|| ret
->type
== MONO_TYPE_TYPEDBYREF
|| mono_type_is_value_type (ret
, "System", "ArgIterator") || mono_type_is_value_type (ret
, "System", "RuntimeArgumentHandle"))
3127 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx
->ip_offset
));
3130 if (ctx
->eval
.size
> 0) {
3131 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx
->eval
.size
, ctx
->ip_offset
));
3133 if (in_any_block (ctx
->header
, ctx
->ip_offset
))
3134 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx
->ip_offset
));
3138 * FIXME we need to fix the case of a non-virtual instance method defined in the parent but call using a token pointing to a subclass.
3139 * This is illegal but mono_get_method_full decoded it.
3140 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3143 do_invoke_method (VerifyContext
*ctx
, int method_token
, gboolean virtual_
)
3147 MonoMethodSignature
*sig
;
3150 gboolean virt_check_this
= FALSE
;
3151 gboolean constrained
= ctx
->prefix_set
& PREFIX_CONSTRAINED
;
3153 if (!(method
= verifier_load_method (ctx
, method_token
, virtual_
? "callvirt" : "call")))
3157 CLEAR_PREFIX (ctx
, PREFIX_CONSTRAINED
);
3159 if (method
->klass
->valuetype
) // && !constrained ???
3160 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx
->ip_offset
));
3162 if ((method
->flags
& METHOD_ATTRIBUTE_STATIC
))
3163 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx
->ip_offset
));
3166 if (method
->flags
& METHOD_ATTRIBUTE_ABSTRACT
)
3167 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx
->ip_offset
));
3169 if ((method
->flags
& METHOD_ATTRIBUTE_VIRTUAL
) && !(method
->flags
& METHOD_ATTRIBUTE_FINAL
) && !mono_class_is_sealed (method
->klass
)) {
3170 virt_check_this
= TRUE
;
3171 ctx
->code
[ctx
->ip_offset
].flags
|= IL_CODE_CALL_NONFINAL_VIRTUAL
;
3175 if (!(sig
= mono_method_get_signature_checked (method
, ctx
->image
, method_token
, ctx
->generic_context
, &error
))) {
3176 mono_error_cleanup (&error
);
3177 sig
= mono_method_get_signature_checked (method
, ctx
->image
, method_token
, NULL
, &error
);
3181 char *name
= mono_type_get_full_name (method
->klass
);
3182 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Could not resolve signature of %s:%s at 0x%04x due to: %s", name
, method
->name
, ctx
->ip_offset
, mono_error_get_message (&error
)));
3183 mono_error_cleanup (&error
);
3188 param_count
= sig
->param_count
+ sig
->hasthis
;
3189 if (!check_underflow (ctx
, param_count
))
3192 for (i
= sig
->param_count
- 1; i
>= 0; --i
) {
3193 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i
); );
3194 value
= stack_pop (ctx
);
3195 if (!verify_stack_type_compatibility (ctx
, sig
->params
[i
], value
)) {
3196 char *stack_name
= stack_slot_full_name (value
);
3197 char *sig_name
= mono_type_full_name (sig
->params
[i
]);
3198 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible parameter with function signature: Calling method with signature (%s) but for argument %d there is a (%s) on stack at 0x%04x", sig_name
, i
, stack_name
, ctx
->ip_offset
));
3199 g_free (stack_name
);
3203 if (stack_slot_is_managed_mutability_pointer (value
))
3204 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer as argument of %s at 0x%04x", virtual_
? "callvirt" : "call", ctx
->ip_offset
));
3206 if ((ctx
->prefix_set
& PREFIX_TAIL
) && stack_slot_is_managed_pointer (value
)) {
3207 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Cannot pass a byref argument to a tail %s at 0x%04x", virtual_
? "callvirt" : "call", ctx
->ip_offset
));
3213 MonoType
*type
= &method
->klass
->byval_arg
;
3216 if (mono_method_is_constructor (method
) && !method
->klass
->valuetype
) {
3217 if (IS_STRICT_MODE (ctx
) && !mono_method_is_constructor (ctx
->method
))
3218 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx
->ip_offset
));
3219 if (IS_STRICT_MODE (ctx
) && method
->klass
!= ctx
->method
->klass
->parent
&& method
->klass
!= ctx
->method
->klass
)
3220 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot call a constructor of a type different from this or super at 0x%04x", ctx
->ip_offset
));
3222 ctx
->super_ctor_called
= TRUE
;
3223 value
= stack_pop_safe (ctx
);
3224 if (IS_STRICT_MODE (ctx
) && (value
->stype
& THIS_POINTER_MASK
) != THIS_POINTER_MASK
)
3225 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx
->ip_offset
));
3227 value
= stack_pop (ctx
);
3230 copy_stack_value (©
, value
);
3231 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3232 //Other parts of the code suffer from the same issue of
3233 copy
.type
= mono_type_get_type_byval (copy
.type
);
3234 copy
.stype
&= ~POINTER_MASK
;
3236 if (virt_check_this
&& !stack_slot_is_this_pointer (value
) && !(method
->klass
->valuetype
|| stack_slot_is_boxed_value (value
)))
3237 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use the call opcode with a non-final virtual method on an object different than the 'this' pointer at 0x%04x", ctx
->ip_offset
));
3239 if (constrained
&& virtual_
) {
3240 if (!stack_slot_is_managed_pointer (value
))
3241 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx
->ip_offset
));
3242 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value
->type
), mono_type_get_underlying_type (ctx
->constrained_type
), TRUE
))
3243 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx
->ip_offset
));
3244 copy
.stype
|= BOXED_MASK
;
3245 copy
.type
= ctx
->constrained_type
;
3247 if (stack_slot_is_managed_pointer (value
) && !mono_class_from_mono_type (value
->type
)->valuetype
)
3248 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot call a reference type using a managed pointer to the this arg at 0x%04x", ctx
->ip_offset
));
3250 if (!virtual_
&& mono_class_from_mono_type (value
->type
)->valuetype
&& !method
->klass
->valuetype
&& !stack_slot_is_boxed_value (value
))
3251 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx
->ip_offset
));
3253 if (virtual_
&& mono_class_from_mono_type (value
->type
)->valuetype
&& !stack_slot_is_boxed_value (value
))
3254 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx
->ip_offset
));
3256 if (method
->klass
->valuetype
&& (stack_slot_is_boxed_value (value
) || !stack_slot_is_managed_pointer (value
)))
3257 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a boxed or literal valuetype to call a valuetype method at 0x%04x", ctx
->ip_offset
));
3259 if (!verify_stack_type_compatibility (ctx
, type
, ©
)) {
3260 char *expected
= mono_type_full_name (type
);
3261 char *effective
= stack_slot_full_name (©
);
3262 char *method_name
= mono_method_full_name (method
, TRUE
);
3263 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible this argument on stack with method signature expected '%s' but got '%s' for a call to '%s' at 0x%04x",
3264 expected
, effective
, method_name
, ctx
->ip_offset
));
3265 g_free (method_name
);
3270 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_method_full (ctx
->method
, method
, mono_class_from_mono_type (value
->type
))) {
3271 char *name
= mono_method_full_name (method
, TRUE
);
3272 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Method %s is not accessible at 0x%04x", name
, ctx
->ip_offset
), MONO_EXCEPTION_METHOD_ACCESS
);
3276 } else if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_method_full (ctx
->method
, method
, NULL
)) {
3277 char *name
= mono_method_full_name (method
, TRUE
);
3278 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Method %s is not accessible at 0x%04x", name
, ctx
->ip_offset
), MONO_EXCEPTION_METHOD_ACCESS
);
3282 if (sig
->ret
->type
!= MONO_TYPE_VOID
) {
3283 if (!mono_type_is_valid_in_context (ctx
, sig
->ret
))
3286 if (check_overflow (ctx
)) {
3287 value
= stack_push (ctx
);
3288 set_stack_value (ctx
, value
, sig
->ret
, FALSE
);
3289 if ((ctx
->prefix_set
& PREFIX_READONLY
) && method
->klass
->rank
&& !strcmp (method
->name
, "Address")) {
3290 ctx
->prefix_set
&= ~PREFIX_READONLY
;
3291 value
->stype
|= CMMP_MASK
;
3296 if ((ctx
->prefix_set
& PREFIX_TAIL
)) {
3297 if (!mono_delegate_ret_equal (mono_method_signature (ctx
->method
)->ret
, sig
->ret
))
3298 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx
->ip_offset
));
3299 if (ctx
->header
->code
[ctx
->ip_offset
+ 5] != CEE_RET
)
3300 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx
->ip_offset
));
3306 do_push_static_field (VerifyContext
*ctx
, int token
, gboolean take_addr
)
3308 MonoClassField
*field
;
3310 if (!check_overflow (ctx
))
3313 CLEAR_PREFIX (ctx
, PREFIX_VOLATILE
);
3315 if (!(field
= verifier_load_field (ctx
, token
, &klass
, take_addr
? "ldsflda" : "ldsfld")))
3318 if (!(field
->type
->attrs
& FIELD_ATTRIBUTE_STATIC
)) {
3319 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx
->ip_offset
));
3322 /*taking the address of initonly field only works from the static constructor */
3323 if (take_addr
&& (field
->type
->attrs
& FIELD_ATTRIBUTE_INIT_ONLY
) &&
3324 !(field
->parent
== ctx
->method
->klass
&& (ctx
->method
->flags
& (METHOD_ATTRIBUTE_SPECIAL_NAME
| METHOD_ATTRIBUTE_STATIC
)) && !strcmp (".cctor", ctx
->method
->name
)))
3325 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx
->ip_offset
));
3327 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_field_full (ctx
->method
, field
, NULL
))
3328 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx
->ip_offset
), MONO_EXCEPTION_FIELD_ACCESS
);
3330 set_stack_value (ctx
, stack_push (ctx
), field
->type
, take_addr
);
3334 do_store_static_field (VerifyContext
*ctx
, int token
) {
3335 MonoClassField
*field
;
3338 CLEAR_PREFIX (ctx
, PREFIX_VOLATILE
);
3340 if (!check_underflow (ctx
, 1))
3343 value
= stack_pop (ctx
);
3345 if (!(field
= verifier_load_field (ctx
, token
, &klass
, "stsfld")))
3348 if (!(field
->type
->attrs
& FIELD_ATTRIBUTE_STATIC
)) {
3349 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx
->ip_offset
));
3353 if (field
->type
->type
== MONO_TYPE_TYPEDBYREF
) {
3354 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx
->ip_offset
));
3358 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_field_full (ctx
->method
, field
, NULL
))
3359 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx
->ip_offset
), MONO_EXCEPTION_FIELD_ACCESS
);
3361 if (!verify_stack_type_compatibility (ctx
, field
->type
, value
)) {
3362 char *stack_name
= stack_slot_full_name (value
);
3363 char *field_name
= mono_type_full_name (field
->type
);
3364 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3365 field_name
, stack_name
, ctx
->ip_offset
));
3366 g_free (field_name
);
3367 g_free (stack_name
);
3372 check_is_valid_type_for_field_ops (VerifyContext
*ctx
, int token
, ILStackDesc
*obj
, MonoClassField
**ret_field
, const char *opcode
)
3374 MonoClassField
*field
;
3376 gboolean is_pointer
;
3378 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3379 if (!(field
= verifier_load_field (ctx
, token
, &klass
, opcode
)))
3383 //the value on stack is going to be used as a pointer
3384 is_pointer
= stack_slot_get_type (obj
) == TYPE_PTR
|| (stack_slot_get_type (obj
) == TYPE_NATIVE_INT
&& !get_stack_type (&field
->parent
->byval_arg
));
3386 if (field
->type
->type
== MONO_TYPE_TYPEDBYREF
) {
3387 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx
->ip_offset
));
3390 g_assert (obj
->type
);
3392 /*The value on the stack must be a subclass of the defining type of the field*/
3393 /* we need to check if we can load the field from the stack value*/
3395 if (stack_slot_get_underlying_type (obj
) == TYPE_NATIVE_INT
)
3396 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx
->ip_offset
));
3398 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_field_full (ctx
->method
, field
, NULL
))
3399 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx
->ip_offset
), MONO_EXCEPTION_FIELD_ACCESS
);
3401 if (!field
->parent
->valuetype
&& stack_slot_is_managed_pointer (obj
))
3402 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Type at stack is a managed pointer to a reference type and is not compatible to reference the field at 0x%04x", ctx
->ip_offset
));
3404 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3405 if (field
->parent
->valuetype
&& stack_slot_is_boxed_value (obj
))
3406 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Type at stack is a boxed valuetype and is not compatible to reference the field at 0x%04x", ctx
->ip_offset
));
3408 if (!stack_slot_is_null_literal (obj
) && !verify_stack_type_compatibility_full (ctx
, &field
->parent
->byval_arg
, obj
, TRUE
, FALSE
)) {
3409 char *found
= stack_slot_full_name (obj
);
3410 char *expected
= mono_type_full_name (&field
->parent
->byval_arg
);
3411 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Expected type '%s' but found '%s' referencing the 'this' argument at 0x%04x", expected
, found
, ctx
->ip_offset
));
3416 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_field_full (ctx
->method
, field
, mono_class_from_mono_type (obj
->type
)))
3417 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx
->ip_offset
), MONO_EXCEPTION_FIELD_ACCESS
);
3420 check_unmanaged_pointer (ctx
, obj
);
3425 do_push_field (VerifyContext
*ctx
, int token
, gboolean take_addr
)
3428 MonoClassField
*field
;
3431 CLEAR_PREFIX (ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
3433 if (!check_underflow (ctx
, 1))
3435 obj
= stack_pop_safe (ctx
);
3437 if (!check_is_valid_type_for_field_ops (ctx
, token
, obj
, &field
, take_addr
? "ldflda" : "ldfld"))
3440 if (take_addr
&& field
->parent
->valuetype
&& !stack_slot_is_managed_pointer (obj
))
3441 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx
->ip_offset
));
3443 if (take_addr
&& (field
->type
->attrs
& FIELD_ATTRIBUTE_INIT_ONLY
) &&
3444 !(field
->parent
== ctx
->method
->klass
&& mono_method_is_constructor (ctx
->method
)))
3445 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx
->ip_offset
));
3447 set_stack_value (ctx
, stack_push (ctx
), field
->type
, take_addr
);
3451 do_store_field (VerifyContext
*ctx
, int token
)
3453 ILStackDesc
*value
, *obj
;
3454 MonoClassField
*field
;
3455 CLEAR_PREFIX (ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
3457 if (!check_underflow (ctx
, 2))
3460 value
= stack_pop (ctx
);
3461 obj
= stack_pop_safe (ctx
);
3463 if (!check_is_valid_type_for_field_ops (ctx
, token
, obj
, &field
, "stfld"))
3466 if (!verify_stack_type_compatibility (ctx
, field
->type
, value
))
3467 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
3470 /*TODO proper handle for Nullable<T>*/
3472 do_box_value (VerifyContext
*ctx
, int klass_token
)
3475 MonoType
*type
= get_boxable_mono_type (ctx
, klass_token
, "box");
3481 if (!check_underflow (ctx
, 1))
3484 value
= stack_pop (ctx
);
3485 /*box is a nop for reference types*/
3487 if (stack_slot_get_underlying_type (value
) == TYPE_COMPLEX
&& MONO_TYPE_IS_REFERENCE (value
->type
) && MONO_TYPE_IS_REFERENCE (type
)) {
3488 stack_push_stack_val (ctx
, value
)->stype
|= BOXED_MASK
;
3493 if (!verify_stack_type_compatibility (ctx
, type
, value
))
3494 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx
->ip_offset
));
3496 klass
= mono_class_from_mono_type (type
);
3497 if (mono_class_is_nullable (klass
))
3498 type
= &mono_class_get_nullable_param (klass
)->byval_arg
;
3499 stack_push_val (ctx
, TYPE_COMPLEX
| BOXED_MASK
, type
);
3503 do_unbox_value (VerifyContext
*ctx
, int klass_token
)
3506 MonoType
*type
= get_boxable_mono_type (ctx
, klass_token
, "unbox");
3511 if (!check_underflow (ctx
, 1))
3514 if (!mono_class_from_mono_type (type
)->valuetype
)
3515 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx
->ip_offset
));
3517 value
= stack_pop (ctx
);
3519 /*Value should be: a boxed valuetype or a reference type*/
3520 if (!(stack_slot_get_type (value
) == TYPE_COMPLEX
&&
3521 (stack_slot_is_boxed_value (value
) || !mono_class_from_mono_type (value
->type
)->valuetype
)))
3522 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type %s at stack for unbox operation at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
3524 set_stack_value (ctx
, value
= stack_push (ctx
), mono_type_get_type_byref (type
), FALSE
);
3525 value
->stype
|= CMMP_MASK
;
3529 do_unbox_any (VerifyContext
*ctx
, int klass_token
)
3532 MonoType
*type
= get_boxable_mono_type (ctx
, klass_token
, "unbox.any");
3537 if (!check_underflow (ctx
, 1))
3540 value
= stack_pop (ctx
);
3542 /*Value should be: a boxed valuetype or a reference type*/
3543 if (!(stack_slot_get_type (value
) == TYPE_COMPLEX
&&
3544 (stack_slot_is_boxed_value (value
) || !mono_class_from_mono_type (value
->type
)->valuetype
)))
3545 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type %s at stack for unbox.any operation at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
3547 set_stack_value (ctx
, stack_push (ctx
), type
, FALSE
);
3551 do_unary_math_op (VerifyContext
*ctx
, int op
)
3554 if (!check_underflow (ctx
, 1))
3556 value
= stack_pop (ctx
);
3557 switch (stack_slot_get_type (value
)) {
3560 case TYPE_NATIVE_INT
:
3565 case TYPE_COMPLEX
: /*only enums are ok*/
3566 if (mono_type_is_enum_type (value
->type
))
3569 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx
->ip_offset
));
3571 stack_push_stack_val (ctx
, value
);
3575 do_conversion (VerifyContext
*ctx
, int kind
)
3578 if (!check_underflow (ctx
, 1))
3580 value
= stack_pop (ctx
);
3582 switch (stack_slot_get_type (value
)) {
3585 case TYPE_NATIVE_INT
:
3589 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type (%s) at stack for conversion operation. Numeric type expected at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
3594 stack_push_val (ctx
, TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
3597 stack_push_val (ctx
,TYPE_I8
, &mono_defaults
.int64_class
->byval_arg
);
3600 stack_push_val (ctx
, TYPE_R8
, &mono_defaults
.double_class
->byval_arg
);
3602 case TYPE_NATIVE_INT
:
3603 stack_push_val (ctx
, TYPE_NATIVE_INT
, &mono_defaults
.int_class
->byval_arg
);
3606 g_error ("unknown type %02x in conversion", kind
);
3612 do_load_token (VerifyContext
*ctx
, int token
)
3616 MonoClass
*handle_class
;
3617 if (!check_overflow (ctx
))
3620 if (ctx
->method
->wrapper_type
!= MONO_WRAPPER_NONE
) {
3621 handle
= mono_method_get_wrapper_data (ctx
->method
, token
);
3622 handle_class
= (MonoClass
*)mono_method_get_wrapper_data (ctx
->method
, token
+ 1);
3623 if (handle_class
== mono_defaults
.typehandle_class
)
3624 handle
= &((MonoClass
*)handle
)->byval_arg
;
3626 switch (token
& 0xff000000) {
3627 case MONO_TOKEN_TYPE_DEF
:
3628 case MONO_TOKEN_TYPE_REF
:
3629 case MONO_TOKEN_TYPE_SPEC
:
3630 case MONO_TOKEN_FIELD_DEF
:
3631 case MONO_TOKEN_METHOD_DEF
:
3632 case MONO_TOKEN_METHOD_SPEC
:
3633 case MONO_TOKEN_MEMBER_REF
:
3634 if (!token_bounds_check (ctx
->image
, token
)) {
3635 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Table index out of range 0x%x for token %x for ldtoken at 0x%04x", mono_metadata_token_index (token
), token
, ctx
->ip_offset
));
3640 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid table 0x%x for token 0x%x for ldtoken at 0x%04x", mono_metadata_token_table (token
), token
, ctx
->ip_offset
));
3644 handle
= mono_ldtoken_checked (ctx
->image
, token
, &handle_class
, ctx
->generic_context
, &error
);
3648 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid token 0x%x for ldtoken at 0x%04x due to %s", token
, ctx
->ip_offset
, mono_error_get_message (&error
)));
3649 mono_error_cleanup (&error
);
3652 if (handle_class
== mono_defaults
.typehandle_class
) {
3653 mono_type_is_valid_in_context (ctx
, (MonoType
*)handle
);
3654 } else if (handle_class
== mono_defaults
.methodhandle_class
) {
3655 mono_method_is_valid_in_context (ctx
, (MonoMethod
*)handle
);
3656 } else if (handle_class
== mono_defaults
.fieldhandle_class
) {
3657 mono_type_is_valid_in_context (ctx
, &((MonoClassField
*)handle
)->parent
->byval_arg
);
3659 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
3661 stack_push_val (ctx
, TYPE_COMPLEX
, mono_class_get_type (handle_class
));
3665 do_ldobj_value (VerifyContext
*ctx
, int token
)
3668 MonoType
*type
= get_boxable_mono_type (ctx
, token
, "ldobj");
3669 CLEAR_PREFIX (ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
3674 if (!check_underflow (ctx
, 1))
3677 value
= stack_pop (ctx
);
3678 if (!stack_slot_is_managed_pointer (value
)
3679 && stack_slot_get_type (value
) != TYPE_NATIVE_INT
3680 && !(stack_slot_get_type (value
) == TYPE_PTR
&& value
->type
->type
!= MONO_TYPE_FNPTR
)) {
3681 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
3685 if (stack_slot_get_type (value
) == TYPE_NATIVE_INT
)
3686 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx
->ip_offset
));
3688 /*We have a byval on the stack, but the comparison must be strict. */
3689 if (!verify_type_compatibility_full (ctx
, type
, mono_type_get_type_byval (value
->type
), TRUE
))
3690 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx
->ip_offset
));
3692 set_stack_value (ctx
, stack_push (ctx
), type
, FALSE
);
3696 do_stobj (VerifyContext
*ctx
, int token
)
3698 ILStackDesc
*dest
, *src
;
3699 MonoType
*type
= get_boxable_mono_type (ctx
, token
, "stobj");
3700 CLEAR_PREFIX (ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
3705 if (!check_underflow (ctx
, 2))
3708 src
= stack_pop (ctx
);
3709 dest
= stack_pop (ctx
);
3711 if (stack_slot_is_managed_mutability_pointer (dest
))
3712 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx
->ip_offset
));
3714 if (!stack_slot_is_managed_pointer (dest
))
3715 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx
->ip_offset
));
3717 if (stack_slot_is_boxed_value (src
) && !MONO_TYPE_IS_REFERENCE (src
->type
) && !MONO_TYPE_IS_REFERENCE (type
))
3718 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use stobj with a boxed source value that is not a reference type at 0x%04x", ctx
->ip_offset
));
3720 if (!verify_stack_type_compatibility (ctx
, type
, src
)) {
3721 char *type_name
= mono_type_full_name (type
);
3722 char *src_name
= stack_slot_full_name (src
);
3723 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Token '%s' and source '%s' of stobj don't match ' at 0x%04x", type_name
, src_name
, ctx
->ip_offset
));
3728 if (!verify_type_compatibility (ctx
, mono_type_get_type_byval (dest
->type
), type
))
3729 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx
->ip_offset
));
3733 do_cpobj (VerifyContext
*ctx
, int token
)
3735 ILStackDesc
*dest
, *src
;
3736 MonoType
*type
= get_boxable_mono_type (ctx
, token
, "cpobj");
3740 if (!check_underflow (ctx
, 2))
3743 src
= stack_pop (ctx
);
3744 dest
= stack_pop (ctx
);
3746 if (!stack_slot_is_managed_pointer (src
))
3747 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx
->ip_offset
));
3749 if (!stack_slot_is_managed_pointer (dest
))
3750 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx
->ip_offset
));
3752 if (stack_slot_is_managed_mutability_pointer (dest
))
3753 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx
->ip_offset
));
3755 if (!verify_type_compatibility (ctx
, type
, mono_type_get_type_byval (src
->type
)))
3756 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx
->ip_offset
));
3758 if (!verify_type_compatibility (ctx
, mono_type_get_type_byval (dest
->type
), type
))
3759 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx
->ip_offset
));
3763 do_initobj (VerifyContext
*ctx
, int token
)
3766 MonoType
*stack
, *type
= get_boxable_mono_type (ctx
, token
, "initobj");
3770 if (!check_underflow (ctx
, 1))
3773 obj
= stack_pop (ctx
);
3775 if (!stack_slot_is_managed_pointer (obj
))
3776 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx
->ip_offset
));
3778 if (stack_slot_is_managed_mutability_pointer (obj
))
3779 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx
->ip_offset
));
3781 stack
= mono_type_get_type_byval (obj
->type
);
3782 if (MONO_TYPE_IS_REFERENCE (stack
)) {
3783 if (!verify_type_compatibility (ctx
, stack
, type
))
3784 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx
->ip_offset
));
3785 else if (IS_STRICT_MODE (ctx
) && !mono_metadata_type_equal (type
, stack
))
3786 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx
->ip_offset
));
3787 } else if (!verify_type_compatibility (ctx
, stack
, type
)) {
3788 char *expected_name
= mono_type_full_name (type
);
3789 char *stack_name
= mono_type_full_name (stack
);
3791 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Initobj %s not compatible with value on stack %s at 0x%04x", expected_name
, stack_name
, ctx
->ip_offset
));
3792 g_free (expected_name
);
3793 g_free (stack_name
);
3798 do_newobj (VerifyContext
*ctx
, int token
)
3802 MonoMethodSignature
*sig
;
3804 gboolean is_delegate
= FALSE
;
3806 if (!(method
= verifier_load_method (ctx
, token
, "newobj")))
3809 if (!mono_method_is_constructor (method
)) {
3810 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token
, ctx
->ip_offset
));
3814 if (mono_class_get_flags (method
->klass
) & (TYPE_ATTRIBUTE_ABSTRACT
| TYPE_ATTRIBUTE_INTERFACE
))
3815 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx
->ip_offset
));
3817 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_method_full (ctx
->method
, method
, NULL
)) {
3818 char *from
= mono_method_full_name (ctx
->method
, TRUE
);
3819 char *to
= mono_method_full_name (method
, TRUE
);
3820 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Constructor %s not visible from %s at 0x%04x", to
, from
, ctx
->ip_offset
), MONO_EXCEPTION_METHOD_ACCESS
);
3825 //FIXME use mono_method_get_signature_full
3826 sig
= mono_method_signature (method
);
3828 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx
->ip_offset
));
3832 if (!sig
->hasthis
) {
3833 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx
->ip_offset
));
3837 if (!check_underflow (ctx
, sig
->param_count
))
3840 is_delegate
= method
->klass
->parent
== mono_defaults
.multicastdelegate_class
;
3843 ILStackDesc
*funptr
;
3844 //first arg is object, second arg is fun ptr
3845 if (sig
->param_count
!= 2) {
3846 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx
->ip_offset
));
3849 funptr
= stack_pop (ctx
);
3850 value
= stack_pop (ctx
);
3851 verify_delegate_compatibility (ctx
, method
->klass
, value
, funptr
);
3853 for (i
= sig
->param_count
- 1; i
>= 0; --i
) {
3854 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i
); );
3855 value
= stack_pop (ctx
);
3856 if (!verify_stack_type_compatibility (ctx
, sig
->params
[i
], value
)) {
3857 char *stack_name
= stack_slot_full_name (value
);
3858 char *sig_name
= mono_type_full_name (sig
->params
[i
]);
3859 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Incompatible parameter value with constructor signature: %s X %s at 0x%04x", sig_name
, stack_name
, ctx
->ip_offset
));
3860 g_free (stack_name
);
3864 if (stack_slot_is_managed_mutability_pointer (value
))
3865 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx
->ip_offset
));
3869 if (check_overflow (ctx
))
3870 set_stack_value (ctx
, stack_push (ctx
), &method
->klass
->byval_arg
, FALSE
);
3874 do_cast (VerifyContext
*ctx
, int token
, const char *opcode
) {
3880 if (!check_underflow (ctx
, 1))
3883 if (!(type
= get_boxable_mono_type (ctx
, token
, opcode
)))
3887 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid %s type at 0x%04x", opcode
, ctx
->ip_offset
));
3891 value
= stack_pop (ctx
);
3892 is_boxed
= stack_slot_is_boxed_value (value
);
3894 if (stack_slot_is_managed_pointer (value
))
3895 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode
, ctx
->ip_offset
));
3896 else if (!MONO_TYPE_IS_REFERENCE (value
->type
) && !is_boxed
) {
3897 char *name
= stack_slot_full_name (value
);
3898 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Expected a reference type on stack for %s but found %s at 0x%04x", opcode
, name
, ctx
->ip_offset
));
3902 switch (value
->type
->type
) {
3903 case MONO_TYPE_FNPTR
:
3905 case MONO_TYPE_TYPEDBYREF
:
3906 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode
, ctx
->ip_offset
));
3911 do_box
= is_boxed
|| mono_type_is_generic_argument(type
) || mono_class_from_mono_type (type
)->valuetype
;
3912 stack_push_val (ctx
, TYPE_COMPLEX
| (do_box
? BOXED_MASK
: 0), type
);
3916 mono_type_from_opcode (int opcode
) {
3924 return &mono_defaults
.sbyte_class
->byval_arg
;
3932 return &mono_defaults
.int16_class
->byval_arg
;
3940 return &mono_defaults
.int32_class
->byval_arg
;
3946 return &mono_defaults
.int64_class
->byval_arg
;
3952 return &mono_defaults
.single_class
->byval_arg
;
3958 return &mono_defaults
.double_class
->byval_arg
;
3964 return &mono_defaults
.int_class
->byval_arg
;
3968 case CEE_LDELEM_REF
:
3969 case CEE_STELEM_REF
:
3970 return &mono_defaults
.object_class
->byval_arg
;
3973 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode
);
3979 do_load_indirect (VerifyContext
*ctx
, int opcode
)
3982 CLEAR_PREFIX (ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
3984 if (!check_underflow (ctx
, 1))
3987 value
= stack_pop (ctx
);
3988 if (!stack_slot_is_managed_pointer (value
)) {
3989 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx
->ip_offset
));
3990 set_stack_value (ctx
, stack_push (ctx
), mono_type_from_opcode (opcode
), FALSE
);
3994 if (opcode
== CEE_LDIND_REF
) {
3995 if (stack_slot_get_underlying_type (value
) != TYPE_COMPLEX
|| mono_class_from_mono_type (value
->type
)->valuetype
)
3996 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx
->ip_offset
));
3997 set_stack_value (ctx
, stack_push (ctx
), mono_type_get_type_byval (value
->type
), FALSE
);
3999 if (!verify_type_compatibility_full (ctx
, mono_type_from_opcode (opcode
), mono_type_get_type_byval (value
->type
), TRUE
))
4000 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode
, ctx
->ip_offset
));
4001 set_stack_value (ctx
, stack_push (ctx
), mono_type_from_opcode (opcode
), FALSE
);
4006 do_store_indirect (VerifyContext
*ctx
, int opcode
)
4008 ILStackDesc
*addr
, *val
;
4009 CLEAR_PREFIX (ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
4011 if (!check_underflow (ctx
, 2))
4014 val
= stack_pop (ctx
);
4015 addr
= stack_pop (ctx
);
4017 check_unmanaged_pointer (ctx
, addr
);
4019 if (!stack_slot_is_managed_pointer (addr
) && stack_slot_get_type (addr
) != TYPE_PTR
) {
4020 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx
->ip_offset
));
4024 if (stack_slot_is_managed_mutability_pointer (addr
)) {
4025 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx
->ip_offset
));
4029 if (!verify_type_compatibility_full (ctx
, mono_type_from_opcode (opcode
), mono_type_get_type_byval (addr
->type
), TRUE
))
4030 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode
, ctx
->ip_offset
));
4032 if (!verify_stack_type_compatibility (ctx
, mono_type_from_opcode (opcode
), val
))
4033 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode
, ctx
->ip_offset
));
4037 do_newarr (VerifyContext
*ctx
, int token
)
4040 MonoType
*type
= get_boxable_mono_type (ctx
, token
, "newarr");
4045 if (!check_underflow (ctx
, 1))
4048 value
= stack_pop (ctx
);
4049 if (stack_slot_get_type (value
) != TYPE_I4
&& stack_slot_get_type (value
) != TYPE_NATIVE_INT
)
4050 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Array size type on stack (%s) is not a verifiable type at 0x%04x", stack_slot_get_name (value
), ctx
->ip_offset
));
4052 set_stack_value (ctx
, stack_push (ctx
), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type
), 1)), FALSE
);
4055 /*FIXME handle arrays that are not 0-indexed*/
4057 do_ldlen (VerifyContext
*ctx
)
4061 if (!check_underflow (ctx
, 1))
4064 value
= stack_pop (ctx
);
4066 if (stack_slot_get_type (value
) != TYPE_COMPLEX
|| value
->type
->type
!= MONO_TYPE_SZARRAY
)
4067 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx
->ip_offset
));
4069 stack_push_val (ctx
, TYPE_NATIVE_INT
, &mono_defaults
.int_class
->byval_arg
);
4072 /*FIXME handle arrays that are not 0-indexed*/
4073 /*FIXME handle readonly prefix and CMMP*/
4075 do_ldelema (VerifyContext
*ctx
, int klass_token
)
4077 ILStackDesc
*index
, *array
, *res
;
4078 MonoType
*type
= get_boxable_mono_type (ctx
, klass_token
, "ldelema");
4084 if (!check_underflow (ctx
, 2))
4087 index
= stack_pop (ctx
);
4088 array
= stack_pop (ctx
);
4090 if (stack_slot_get_type (index
) != TYPE_I4
&& stack_slot_get_type (index
) != TYPE_NATIVE_INT
)
4091 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Index type(%s) for ldelema is not an int or a native int at 0x%04x", stack_slot_get_name (index
), ctx
->ip_offset
));
4093 if (!stack_slot_is_null_literal (array
)) {
4094 if (stack_slot_get_type (array
) != TYPE_COMPLEX
|| array
->type
->type
!= MONO_TYPE_SZARRAY
)
4095 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array
), ctx
->ip_offset
));
4097 if (get_stack_type (type
) == TYPE_I4
|| get_stack_type (type
) == TYPE_NATIVE_INT
) {
4098 valid
= verify_type_compatibility_full (ctx
, type
, &array
->type
->data
.klass
->byval_arg
, TRUE
);
4100 valid
= mono_metadata_type_equal (type
, &array
->type
->data
.klass
->byval_arg
);
4103 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx
->ip_offset
));
4107 res
= stack_push (ctx
);
4108 set_stack_value (ctx
, res
, type
, TRUE
);
4109 if (ctx
->prefix_set
& PREFIX_READONLY
) {
4110 ctx
->prefix_set
&= ~PREFIX_READONLY
;
4111 res
->stype
|= CMMP_MASK
;
4116 * FIXME handle arrays that are not 0-indexed
4117 * FIXME handle readonly prefix and CMMP
4120 do_ldelem (VerifyContext
*ctx
, int opcode
, int token
)
4122 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4123 ILStackDesc
*index
, *array
;
4125 if (!check_underflow (ctx
, 2))
4128 if (opcode
== CEE_LDELEM
) {
4129 if (!(type
= verifier_load_type (ctx
, token
, "ldelem.any"))) {
4130 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token
, ctx
->ip_offset
));
4134 type
= mono_type_from_opcode (opcode
);
4137 index
= stack_pop (ctx
);
4138 array
= stack_pop (ctx
);
4140 if (stack_slot_get_type (index
) != TYPE_I4
&& stack_slot_get_type (index
) != TYPE_NATIVE_INT
)
4141 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Index type(%s) for ldelem.X is not an int or a native int at 0x%04x", stack_slot_get_name (index
), ctx
->ip_offset
));
4143 if (!stack_slot_is_null_literal (array
)) {
4144 if (stack_slot_get_type (array
) != TYPE_COMPLEX
|| array
->type
->type
!= MONO_TYPE_SZARRAY
)
4145 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type(%s) for ldelem.X at 0x%04x", stack_slot_get_name (array
), ctx
->ip_offset
));
4147 if (opcode
== CEE_LDELEM_REF
) {
4148 if (array
->type
->data
.klass
->valuetype
)
4149 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx
->ip_offset
));
4150 type
= &array
->type
->data
.klass
->byval_arg
;
4152 MonoType
*candidate
= &array
->type
->data
.klass
->byval_arg
;
4153 if (IS_STRICT_MODE (ctx
)) {
4154 MonoType
*underlying_type
= mono_type_get_underlying_type_any (type
);
4155 MonoType
*underlying_candidate
= mono_type_get_underlying_type_any (candidate
);
4156 if ((IS_ONE_OF2 (underlying_type
->type
, MONO_TYPE_I4
, MONO_TYPE_U4
) && IS_ONE_OF2 (underlying_candidate
->type
, MONO_TYPE_I
, MONO_TYPE_U
)) ||
4157 (IS_ONE_OF2 (underlying_candidate
->type
, MONO_TYPE_I4
, MONO_TYPE_U4
) && IS_ONE_OF2 (underlying_type
->type
, MONO_TYPE_I
, MONO_TYPE_U
)))
4158 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx
->ip_offset
));
4160 if (!verify_type_compatibility_full (ctx
, type
, candidate
, TRUE
))
4161 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx
->ip_offset
));
4166 set_stack_value (ctx
, stack_push (ctx
), type
, FALSE
);
4171 * FIXME handle arrays that are not 0-indexed
4174 do_stelem (VerifyContext
*ctx
, int opcode
, int token
)
4176 ILStackDesc
*index
, *array
, *value
;
4178 if (!check_underflow (ctx
, 3))
4181 if (opcode
== CEE_STELEM
) {
4182 if (!(type
= verifier_load_type (ctx
, token
, "stelem.any"))) {
4183 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token
, ctx
->ip_offset
));
4187 type
= mono_type_from_opcode (opcode
);
4190 value
= stack_pop (ctx
);
4191 index
= stack_pop (ctx
);
4192 array
= stack_pop (ctx
);
4194 if (stack_slot_get_type (index
) != TYPE_I4
&& stack_slot_get_type (index
) != TYPE_NATIVE_INT
)
4195 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Index type(%s) for stdelem.X is not an int or a native int at 0x%04x", stack_slot_get_name (index
), ctx
->ip_offset
));
4197 if (!stack_slot_is_null_literal (array
)) {
4198 if (stack_slot_get_type (array
) != TYPE_COMPLEX
|| array
->type
->type
!= MONO_TYPE_SZARRAY
) {
4199 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type(%s) for stelem.X at 0x%04x", stack_slot_get_name (array
), ctx
->ip_offset
));
4201 if (opcode
== CEE_STELEM_REF
) {
4202 if (array
->type
->data
.klass
->valuetype
)
4203 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx
->ip_offset
));
4204 } else if (!verify_type_compatibility_full (ctx
, &array
->type
->data
.klass
->byval_arg
, type
, TRUE
)) {
4205 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx
->ip_offset
));
4209 if (opcode
== CEE_STELEM_REF
) {
4210 if (!stack_slot_is_boxed_value (value
) && mono_class_from_mono_type (value
->type
)->valuetype
)
4211 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx
->ip_offset
));
4212 } else if (opcode
!= CEE_STELEM_REF
) {
4213 if (!verify_stack_type_compatibility (ctx
, type
, value
))
4214 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx
->ip_offset
));
4216 if (stack_slot_is_boxed_value (value
) && !MONO_TYPE_IS_REFERENCE (value
->type
) && !MONO_TYPE_IS_REFERENCE (type
))
4217 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use stobj with a boxed source value that is not a reference type at 0x%04x", ctx
->ip_offset
));
4223 do_throw (VerifyContext
*ctx
)
4225 ILStackDesc
*exception
;
4226 if (!check_underflow (ctx
, 1))
4228 exception
= stack_pop (ctx
);
4230 if (!stack_slot_is_null_literal (exception
) && !(stack_slot_get_type (exception
) == TYPE_COMPLEX
&& !mono_class_from_mono_type (exception
->type
)->valuetype
))
4231 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx
->ip_offset
));
4233 if (mono_type_is_generic_argument (exception
->type
) && !stack_slot_is_boxed_value (exception
)) {
4234 char *name
= mono_type_full_name (exception
->type
);
4235 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid type on stack for throw, expected reference type but found unboxed %s at 0x%04x ", name
, ctx
->ip_offset
));
4238 /*The stack is left empty after a throw*/
4244 do_endfilter (VerifyContext
*ctx
)
4246 MonoExceptionClause
*clause
;
4248 if (IS_STRICT_MODE (ctx
)) {
4249 if (ctx
->eval
.size
!= 1)
4250 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx
->ip_offset
));
4252 if (ctx
->eval
.size
>= 1 && stack_slot_get_type (stack_pop (ctx
)) != TYPE_I4
)
4253 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx
->ip_offset
));
4256 if ((clause
= is_correct_endfilter (ctx
, ctx
->ip_offset
))) {
4257 if (IS_STRICT_MODE (ctx
)) {
4258 if (ctx
->ip_offset
!= clause
->handler_offset
- 2)
4259 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx
->ip_offset
));
4261 if ((ctx
->ip_offset
!= clause
->handler_offset
- 2) && !MONO_OFFSET_IN_HANDLER (clause
, ctx
->ip_offset
))
4262 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx
->ip_offset
));
4265 if (IS_STRICT_MODE (ctx
) && !is_unverifiable_endfilter (ctx
, ctx
->ip_offset
))
4266 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx
->ip_offset
));
4268 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx
->ip_offset
));
4275 do_leave (VerifyContext
*ctx
, int delta
)
4277 int target
= ((gint32
)ctx
->ip_offset
) + delta
;
4278 if (target
>= ctx
->code_size
|| target
< 0)
4279 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Branch target out of code at 0x%04x", ctx
->ip_offset
));
4281 if (!is_correct_leave (ctx
->header
, ctx
->ip_offset
, target
))
4282 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx
->ip_offset
));
4284 ctx
->target
= target
;
4290 * Verify br and br.s opcodes.
4293 do_static_branch (VerifyContext
*ctx
, int delta
)
4295 int target
= ctx
->ip_offset
+ delta
;
4296 if (target
< 0 || target
>= ctx
->code_size
) {
4297 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("branch target out of code at 0x%04x", ctx
->ip_offset
));
4301 switch (is_valid_branch_instruction (ctx
->header
, ctx
->ip_offset
, target
)) {
4303 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx
->ip_offset
));
4306 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx
->ip_offset
));
4310 ctx
->target
= target
;
4314 do_switch (VerifyContext
*ctx
, int count
, const unsigned char *data
)
4316 int i
, base
= ctx
->ip_offset
+ 5 + count
* 4;
4319 if (!check_underflow (ctx
, 1))
4322 value
= stack_pop (ctx
);
4324 if (stack_slot_get_type (value
) != TYPE_I4
&& stack_slot_get_type (value
) != TYPE_NATIVE_INT
)
4325 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx
->ip_offset
));
4327 for (i
= 0; i
< count
; ++i
) {
4328 int target
= base
+ read32 (data
+ i
* 4);
4330 if (target
< 0 || target
>= ctx
->code_size
) {
4331 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Switch target %x out of code at 0x%04x", i
, ctx
->ip_offset
));
4335 switch (is_valid_branch_instruction (ctx
->header
, ctx
->ip_offset
, target
)) {
4337 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i
, ctx
->ip_offset
));
4340 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i
, ctx
->ip_offset
));
4343 merge_stacks (ctx
, &ctx
->eval
, &ctx
->code
[target
], FALSE
, TRUE
);
4348 do_load_function_ptr (VerifyContext
*ctx
, guint32 token
, gboolean virtual_
)
4353 if (virtual_
&& !check_underflow (ctx
, 1))
4356 if (!virtual_
&& !check_overflow (ctx
))
4359 if (ctx
->method
->wrapper_type
!= MONO_WRAPPER_NONE
) {
4360 method
= (MonoMethod
*)mono_method_get_wrapper_data (ctx
->method
, (guint32
)token
);
4362 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
4366 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token
) || !token_bounds_check (ctx
->image
, token
)) {
4367 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
4371 if (!(method
= verifier_load_method (ctx
, token
, virtual_
? "ldvirtfrn" : "ldftn")))
4375 if (mono_method_is_constructor (method
))
4376 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx
->ip_offset
));
4379 ILStackDesc
*top
= stack_pop (ctx
);
4381 if (stack_slot_get_type (top
) != TYPE_COMPLEX
|| top
->type
->type
== MONO_TYPE_VALUETYPE
)
4382 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx
->ip_offset
));
4384 if (method
->flags
& METHOD_ATTRIBUTE_STATIC
)
4385 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx
->ip_offset
));
4387 if (!verify_stack_type_compatibility (ctx
, &method
->klass
->byval_arg
, top
))
4388 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx
->ip_offset
));
4391 if (!IS_SKIP_VISIBILITY (ctx
) && !mono_method_can_access_method_full (ctx
->method
, method
, NULL
))
4392 CODE_NOT_VERIFIABLE2 (ctx
, g_strdup_printf ("Loaded method is not visible for ldftn/ldvirtftn at 0x%04x", ctx
->ip_offset
), MONO_EXCEPTION_METHOD_ACCESS
);
4394 top
= stack_push_val(ctx
, TYPE_PTR
, mono_type_create_fnptr_from_mono_method (ctx
, method
));
4395 top
->method
= method
;
4399 do_sizeof (VerifyContext
*ctx
, int token
)
4403 if (!(type
= verifier_load_type (ctx
, token
, "sizeof")))
4406 if (type
->byref
&& type
->type
!= MONO_TYPE_TYPEDBYREF
) {
4407 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx
->ip_offset
));
4411 if (type
->type
== MONO_TYPE_VOID
) {
4412 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx
->ip_offset
));
4416 if (check_overflow (ctx
))
4417 set_stack_value (ctx
, stack_push (ctx
), &mono_defaults
.uint32_class
->byval_arg
, FALSE
);
4420 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4422 do_localloc (VerifyContext
*ctx
)
4424 if (ctx
->eval
.size
!= 1) {
4425 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx
->ip_offset
));
4429 if (in_any_exception_block (ctx
->header
, ctx
->ip_offset
)) {
4430 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx
->ip_offset
));
4434 /*TODO verify top type*/
4435 /* top = */ stack_pop (ctx
);
4437 set_stack_value (ctx
, stack_push (ctx
), &mono_defaults
.int_class
->byval_arg
, FALSE
);
4438 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx
->ip_offset
));
4442 do_ldstr (VerifyContext
*ctx
, guint32 token
)
4444 GSList
*error
= NULL
;
4445 if (ctx
->method
->wrapper_type
== MONO_WRAPPER_NONE
&& !image_is_dynamic (ctx
->image
)) {
4446 if (mono_metadata_token_code (token
) != MONO_TOKEN_STRING
) {
4447 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid string token %x at 0x%04x", token
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
4451 if (!mono_verifier_verify_string_signature (ctx
->image
, mono_metadata_token_index (token
), &error
)) {
4453 ctx
->list
= g_slist_concat (ctx
->list
, error
);
4454 ADD_VERIFY_ERROR2 (ctx
, g_strdup_printf ("Invalid string index %x at 0x%04x", token
, ctx
->ip_offset
), MONO_EXCEPTION_BAD_IMAGE
);
4459 if (check_overflow (ctx
))
4460 stack_push_val (ctx
, TYPE_COMPLEX
, &mono_defaults
.string_class
->byval_arg
);
4464 do_refanyval (VerifyContext
*ctx
, int token
)
4468 if (!check_underflow (ctx
, 1))
4471 if (!(type
= get_boxable_mono_type (ctx
, token
, "refanyval")))
4474 top
= stack_pop (ctx
);
4476 if (top
->stype
!= TYPE_PTR
|| top
->type
->type
!= MONO_TYPE_TYPEDBYREF
)
4477 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Expected a typedref as argument for refanyval, but found %s at 0x%04x", stack_slot_get_name (top
), ctx
->ip_offset
));
4479 set_stack_value (ctx
, stack_push (ctx
), type
, TRUE
);
4483 do_refanytype (VerifyContext
*ctx
)
4487 if (!check_underflow (ctx
, 1))
4490 top
= stack_pop (ctx
);
4492 if (top
->stype
!= TYPE_PTR
|| top
->type
->type
!= MONO_TYPE_TYPEDBYREF
)
4493 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Expected a typedref as argument for refanytype, but found %s at 0x%04x", stack_slot_get_name (top
), ctx
->ip_offset
));
4495 set_stack_value (ctx
, stack_push (ctx
), &mono_defaults
.typehandle_class
->byval_arg
, FALSE
);
4500 do_mkrefany (VerifyContext
*ctx
, int token
)
4504 if (!check_underflow (ctx
, 1))
4507 if (!(type
= get_boxable_mono_type (ctx
, token
, "refanyval")))
4510 top
= stack_pop (ctx
);
4512 if (stack_slot_is_managed_mutability_pointer (top
))
4513 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx
->ip_offset
));
4515 if (!stack_slot_is_managed_pointer (top
)) {
4516 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Expected a managed pointer for mkrefany, but found %s at 0x%04x", stack_slot_get_name (top
), ctx
->ip_offset
));
4518 MonoType
*stack_type
= mono_type_get_type_byval (top
->type
);
4519 if (MONO_TYPE_IS_REFERENCE (type
) && !mono_metadata_type_equal (type
, stack_type
))
4520 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx
->ip_offset
));
4522 if (!MONO_TYPE_IS_REFERENCE (type
) && !verify_type_compatibility_full (ctx
, type
, stack_type
, TRUE
))
4523 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx
->ip_offset
));
4526 set_stack_value (ctx
, stack_push (ctx
), &mono_defaults
.typed_reference_class
->byval_arg
, FALSE
);
4530 do_ckfinite (VerifyContext
*ctx
)
4533 if (!check_underflow (ctx
, 1))
4536 top
= stack_pop (ctx
);
4538 if (stack_slot_get_underlying_type (top
) != TYPE_R8
)
4539 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Expected float32 or float64 on stack for ckfinit but found %s at 0x%04x", stack_slot_get_name (top
), ctx
->ip_offset
));
4540 stack_push_stack_val (ctx
, top
);
4544 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4546 * @from holds new values for a given control path
4547 * @to holds the current values of a given control path
4549 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4552 merge_stacks (VerifyContext
*ctx
, ILCodeDesc
*from
, ILCodeDesc
*to
, gboolean start
, gboolean external
)
4556 stack_init (ctx
, to
);
4559 if (to
->flags
== IL_CODE_FLAG_NOT_PROCESSED
)
4562 stack_copy (&ctx
->eval
, to
);
4564 } else if (!(to
->flags
& IL_CODE_STACK_MERGED
)) {
4565 stack_copy (to
, &ctx
->eval
);
4568 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from
->size
, to
->size
); );
4570 if (from
->size
!= to
->size
) {
4571 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from
->size
, to
->size
, ctx
->ip_offset
); );
4572 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Could not merge stacks, different sizes (%d x %d) at 0x%04x", from
->size
, to
->size
, ctx
->ip_offset
));
4576 //FIXME we need to preserve CMMP attributes
4577 //FIXME we must take null literals into consideration.
4578 for (i
= 0; i
< from
->size
; ++i
) {
4579 ILStackDesc
*new_slot
= from
->stack
+ i
;
4580 ILStackDesc
*old_slot
= to
->stack
+ i
;
4581 MonoType
*new_type
= mono_type_from_stack_slot (new_slot
);
4582 MonoType
*old_type
= mono_type_from_stack_slot (old_slot
);
4583 MonoClass
*old_class
= mono_class_from_mono_type (old_type
);
4584 MonoClass
*new_class
= mono_class_from_mono_type (new_type
);
4585 MonoClass
*match_class
= NULL
;
4587 // S := T then U = S (new value is compatible with current value, keep current)
4588 if (verify_stack_type_compatibility (ctx
, old_type
, new_slot
)) {
4589 copy_stack_value (new_slot
, old_slot
);
4593 // T := S then U = T (old value is compatible with current value, use new)
4594 if (verify_stack_type_compatibility (ctx
, new_type
, old_slot
)) {
4595 copy_stack_value (old_slot
, new_slot
);
4599 /*Both slots are the same boxed valuetype. Simply copy it.*/
4600 if (stack_slot_is_boxed_value (old_slot
) &&
4601 stack_slot_is_boxed_value (new_slot
) &&
4602 mono_metadata_type_equal (old_type
, new_type
)) {
4603 copy_stack_value (new_slot
, old_slot
);
4607 if (mono_type_is_generic_argument (old_type
) || mono_type_is_generic_argument (new_type
)) {
4608 char *old_name
= stack_slot_full_name (old_slot
);
4609 char *new_name
= stack_slot_full_name (new_slot
);
4610 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Could not merge stack at depth %d, types not compatible: %s X %s at 0x%04x", i
, old_name
, new_name
, ctx
->ip_offset
));
4616 //both are reference types, use closest common super type
4617 if (!mono_class_from_mono_type (old_type
)->valuetype
4618 && !mono_class_from_mono_type (new_type
)->valuetype
4619 && !stack_slot_is_managed_pointer (old_slot
)
4620 && !stack_slot_is_managed_pointer (new_slot
)) {
4622 mono_class_setup_supertypes (old_class
);
4623 mono_class_setup_supertypes (new_class
);
4625 for (j
= MIN (old_class
->idepth
, new_class
->idepth
) - 1; j
> 0; --j
) {
4626 if (mono_metadata_type_equal (&old_class
->supertypes
[j
]->byval_arg
, &new_class
->supertypes
[j
]->byval_arg
)) {
4627 match_class
= old_class
->supertypes
[j
];
4632 mono_class_setup_interfaces (old_class
, &error
);
4633 if (!mono_error_ok (&error
)) {
4634 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot merge stacks due to a TypeLoadException %s at 0x%04x", mono_error_get_message (&error
), ctx
->ip_offset
));
4635 mono_error_cleanup (&error
);
4638 mono_class_setup_interfaces (new_class
, &error
);
4639 if (!mono_error_ok (&error
)) {
4640 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Cannot merge stacks due to a TypeLoadException %s at 0x%04x", mono_error_get_message (&error
), ctx
->ip_offset
));
4641 mono_error_cleanup (&error
);
4645 /* if old class is an interface that new class implements */
4646 if (mono_class_is_interface (old_class
)) {
4647 if (verifier_class_is_assignable_from (old_class
, new_class
)) {
4648 match_class
= old_class
;
4651 for (j
= 0; j
< old_class
->interface_count
; ++j
) {
4652 if (verifier_class_is_assignable_from (old_class
->interfaces
[j
], new_class
)) {
4653 match_class
= old_class
->interfaces
[j
];
4659 if (mono_class_is_interface (new_class
)) {
4660 if (verifier_class_is_assignable_from (new_class
, old_class
)) {
4661 match_class
= new_class
;
4664 for (j
= 0; j
< new_class
->interface_count
; ++j
) {
4665 if (verifier_class_is_assignable_from (new_class
->interfaces
[j
], old_class
)) {
4666 match_class
= new_class
->interfaces
[j
];
4672 //No decent super type found, use object
4673 match_class
= mono_defaults
.object_class
;
4675 } else if (is_compatible_boxed_valuetype (ctx
,old_type
, new_type
, new_slot
, FALSE
) || is_compatible_boxed_valuetype (ctx
, new_type
, old_type
, old_slot
, FALSE
)) {
4676 match_class
= mono_defaults
.object_class
;
4681 char *old_name
= stack_slot_full_name (old_slot
);
4682 char *new_name
= stack_slot_full_name (new_slot
);
4683 CODE_NOT_VERIFIABLE (ctx
, g_strdup_printf ("Could not merge stack at depth %d, types not compatible: %s X %s at 0x%04x", i
, old_name
, new_name
, ctx
->ip_offset
));
4687 set_stack_value (ctx
, old_slot
, &new_class
->byval_arg
, stack_slot_is_managed_pointer (old_slot
));
4691 g_assert (match_class
);
4692 set_stack_value (ctx
, old_slot
, &match_class
->byval_arg
, stack_slot_is_managed_pointer (old_slot
));
4693 set_stack_value (ctx
, new_slot
, &match_class
->byval_arg
, stack_slot_is_managed_pointer (old_slot
));
4699 to
->flags
|= IL_CODE_FLAG_WAS_TARGET
;
4700 to
->flags
|= IL_CODE_STACK_MERGED
;
4703 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4704 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4707 * is_clause_in_range :
4709 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4712 is_clause_in_range (MonoExceptionClause
*clause
, guint32 start
, guint32 end
)
4714 if (clause
->try_offset
>= start
&& clause
->try_offset
< end
)
4716 if (HANDLER_START (clause
) >= start
&& HANDLER_START (clause
) < end
)
4722 * is_clause_inside_range :
4724 * Returns TRUE if @clause lies completely inside the @start - @end range.
4727 is_clause_inside_range (MonoExceptionClause
*clause
, guint32 start
, guint32 end
)
4729 if (clause
->try_offset
< start
|| (clause
->try_offset
+ clause
->try_len
) > end
)
4731 if (HANDLER_START (clause
) < start
|| (clause
->handler_offset
+ clause
->handler_len
) > end
)
4737 * is_clause_nested :
4739 * Returns TRUE if @nested is nested in @clause.
4742 is_clause_nested (MonoExceptionClause
*clause
, MonoExceptionClause
*nested
)
4744 if (clause
->flags
== MONO_EXCEPTION_CLAUSE_FILTER
&& is_clause_inside_range (nested
, clause
->data
.filter_offset
, clause
->handler_offset
))
4746 return is_clause_inside_range (nested
, clause
->try_offset
, clause
->try_offset
+ clause
->try_len
) ||
4747 is_clause_inside_range (nested
, clause
->handler_offset
, clause
->handler_offset
+ clause
->handler_len
);
4750 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4751 * the each pair of exception must have the following properties:
4752 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4753 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4754 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4757 verify_clause_relationship (VerifyContext
*ctx
, MonoExceptionClause
*clause
, MonoExceptionClause
*to_test
)
4759 /*clause is nested*/
4760 if (to_test
->flags
== MONO_EXCEPTION_CLAUSE_FILTER
&& is_clause_inside_range (clause
, to_test
->data
.filter_offset
, to_test
->handler_offset
)) {
4761 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Exception clause inside filter"));
4765 /*wrong nesting order.*/
4766 if (is_clause_nested (clause
, to_test
)) {
4767 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4771 /*mutual protection*/
4772 if (clause
->try_offset
== to_test
->try_offset
&& clause
->try_len
== to_test
->try_len
) {
4773 /*handlers are not disjoint*/
4774 if (is_clause_in_range (to_test
, HANDLER_START (clause
), clause
->handler_offset
+ clause
->handler_len
)) {
4775 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Exception handlers overlap"));
4778 /* handlers are not catch or filter */
4779 if (!IS_CATCH_OR_FILTER (clause
) || !IS_CATCH_OR_FILTER (to_test
)) {
4780 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4787 /*not completelly disjoint*/
4788 if ((is_clause_in_range (to_test
, clause
->try_offset
, clause
->try_offset
+ clause
->try_len
) ||
4789 is_clause_in_range (to_test
, HANDLER_START (clause
), clause
->handler_offset
+ clause
->handler_len
)) && !is_clause_nested (to_test
, clause
))
4790 ADD_VERIFY_ERROR (ctx
, g_strdup_printf ("Exception clauses overlap"));
4793 #define code_bounds_check(size) \
4794 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4795 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4800 mono_opcode_is_prefix (int op
)
4803 case MONO_CEE_UNALIGNED_
:
4804 case MONO_CEE_VOLATILE_
:
4805 case MONO_CEE_TAIL_
:
4806 case MONO_CEE_CONSTRAINED_
:
4807 case MONO_CEE_READONLY_
:
4814 * FIXME: need to distinguish between valid and verifiable.
4815 * Need to keep track of types on the stack.
4816 * Verify types for opcodes.
4819 mono_method_verify (MonoMethod
*method
, int level
)
4822 const unsigned char *ip
, *code_start
;
4823 const unsigned char *end
;
4824 MonoSimpleBasicBlock
*bb
= NULL
, *original_bb
= NULL
;
4826 int i
, n
, need_merge
= 0, start
= 0;
4827 guint ip_offset
= 0, prefix
= 0;
4828 MonoGenericContext
*generic_context
= NULL
;
4832 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method
->klass
->name_space
, method
->klass
->name
, method
->name
); );
4834 init_verifier_stats ();
4836 if (method
->iflags
& (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL
| METHOD_IMPL_ATTRIBUTE_RUNTIME
) ||
4837 (method
->flags
& (METHOD_ATTRIBUTE_PINVOKE_IMPL
| METHOD_ATTRIBUTE_ABSTRACT
))) {
4841 memset (&ctx
, 0, sizeof (VerifyContext
));
4843 //FIXME use mono_method_get_signature_full
4844 ctx
.signature
= mono_method_signature (method
);
4845 if (!ctx
.signature
) {
4846 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Could not decode method signature"));
4848 finish_collect_stats ();
4851 if (!method
->is_generic
&& !mono_class_is_gtd (method
->klass
) && ctx
.signature
->has_type_parameters
) {
4852 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4853 finish_collect_stats ();
4857 ctx
.header
= mono_method_get_header_checked (method
, &error
);
4859 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Could not decode method header due to %s", mono_error_get_message (&error
)));
4860 mono_error_cleanup (&error
);
4861 finish_collect_stats ();
4864 ctx
.method
= method
;
4865 code_start
= ip
= ctx
.header
->code
;
4866 end
= ip
+ ctx
.header
->code_size
;
4867 ctx
.image
= image
= method
->klass
->image
;
4870 ctx
.max_args
= ctx
.signature
->param_count
+ ctx
.signature
->hasthis
;
4871 ctx
.max_stack
= ctx
.header
->max_stack
;
4872 ctx
.verifiable
= ctx
.valid
= 1;
4875 ctx
.code
= g_new (ILCodeDesc
, ctx
.header
->code_size
);
4876 ctx
.code_size
= ctx
.header
->code_size
;
4877 _MEM_ALLOC (sizeof (ILCodeDesc
) * ctx
.header
->code_size
);
4879 memset(ctx
.code
, 0, sizeof (ILCodeDesc
) * ctx
.header
->code_size
);
4881 ctx
.num_locals
= ctx
.header
->num_locals
;
4882 ctx
.locals
= (MonoType
**)g_memdup (ctx
.header
->locals
, sizeof (MonoType
*) * ctx
.header
->num_locals
);
4883 _MEM_ALLOC (sizeof (MonoType
*) * ctx
.header
->num_locals
);
4885 if (ctx
.num_locals
> 0 && !ctx
.header
->init_locals
)
4886 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Method with locals variable but without init locals set"));
4888 ctx
.params
= g_new (MonoType
*, ctx
.max_args
);
4889 _MEM_ALLOC (sizeof (MonoType
*) * ctx
.max_args
);
4891 if (ctx
.signature
->hasthis
)
4892 ctx
.params
[0] = method
->klass
->valuetype
? &method
->klass
->this_arg
: &method
->klass
->byval_arg
;
4893 memcpy (ctx
.params
+ ctx
.signature
->hasthis
, ctx
.signature
->params
, sizeof (MonoType
*) * ctx
.signature
->param_count
);
4895 if (ctx
.signature
->is_inflated
)
4896 ctx
.generic_context
= generic_context
= mono_method_get_context (method
);
4898 if (!generic_context
&& (mono_class_is_gtd (method
->klass
) || method
->is_generic
)) {
4899 if (method
->is_generic
)
4900 ctx
.generic_context
= generic_context
= &(mono_method_get_generic_container (method
)->context
);
4902 ctx
.generic_context
= generic_context
= &mono_class_get_generic_container (method
->klass
)->context
;
4905 for (i
= 0; i
< ctx
.num_locals
; ++i
) {
4906 MonoType
*uninflated
= ctx
.locals
[i
];
4907 ctx
.locals
[i
] = mono_class_inflate_generic_type_checked (ctx
.locals
[i
], ctx
.generic_context
, &error
);
4908 if (!mono_error_ok (&error
)) {
4909 char *name
= mono_type_full_name (ctx
.locals
[i
] ? ctx
.locals
[i
] : uninflated
);
4910 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid local %d of type %s", i
, name
));
4912 mono_error_cleanup (&error
);
4913 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4919 for (i
= 0; i
< ctx
.max_args
; ++i
) {
4920 MonoType
*uninflated
= ctx
.params
[i
];
4921 ctx
.params
[i
] = mono_class_inflate_generic_type_checked (ctx
.params
[i
], ctx
.generic_context
, &error
);
4922 if (!mono_error_ok (&error
)) {
4923 char *name
= mono_type_full_name (ctx
.params
[i
] ? ctx
.params
[i
] : uninflated
);
4924 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid parameter %d of type %s", i
, name
));
4926 mono_error_cleanup (&error
);
4927 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4932 stack_init (&ctx
, &ctx
.eval
);
4934 for (i
= 0; i
< ctx
.num_locals
; ++i
) {
4935 if (!mono_type_is_valid_in_context (&ctx
, ctx
.locals
[i
]))
4937 if (get_stack_type (ctx
.locals
[i
]) == TYPE_INV
) {
4938 char *name
= mono_type_full_name (ctx
.locals
[i
]);
4939 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid local %i of type %s", i
, name
));
4946 for (i
= 0; i
< ctx
.max_args
; ++i
) {
4947 if (!mono_type_is_valid_in_context (&ctx
, ctx
.params
[i
]))
4950 if (get_stack_type (ctx
.params
[i
]) == TYPE_INV
) {
4951 char *name
= mono_type_full_name (ctx
.params
[i
]);
4952 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid parameter %i of type %s", i
, name
));
4961 for (i
= 0; i
< ctx
.header
->num_clauses
&& ctx
.valid
; ++i
) {
4962 MonoExceptionClause
*clause
= ctx
.header
->clauses
+ i
;
4963 VERIFIER_DEBUG (printf ("clause try %x len %x filter at %x handler at %x len %x\n", clause
->try_offset
, clause
->try_len
, clause
->data
.filter_offset
, clause
->handler_offset
, clause
->handler_len
); );
4965 if (clause
->try_offset
> ctx
.code_size
|| ADD_IS_GREATER_OR_OVF (clause
->try_offset
, clause
->try_len
, ctx
.code_size
))
4966 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("try clause out of bounds at 0x%04x", clause
->try_offset
));
4968 if (clause
->try_len
<= 0)
4969 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause
->try_offset
));
4971 if (clause
->handler_offset
> ctx
.code_size
|| ADD_IS_GREATER_OR_OVF (clause
->handler_offset
, clause
->handler_len
, ctx
.code_size
))
4972 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause
->try_offset
));
4974 if (clause
->handler_len
<= 0)
4975 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause
->try_offset
));
4977 if (clause
->try_offset
< clause
->handler_offset
&& ADD_IS_GREATER_OR_OVF (clause
->try_offset
, clause
->try_len
, HANDLER_START (clause
)))
4978 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause
->try_offset
, clause
->handler_offset
));
4980 if (clause
->flags
== MONO_EXCEPTION_CLAUSE_FILTER
) {
4981 if (clause
->data
.filter_offset
> ctx
.code_size
)
4982 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause
->try_offset
));
4984 if (clause
->data
.filter_offset
>= clause
->handler_offset
)
4985 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause
->data
.filter_offset
));
4988 for (n
= i
+ 1; n
< ctx
.header
->num_clauses
&& ctx
.valid
; ++n
)
4989 verify_clause_relationship (&ctx
, clause
, ctx
.header
->clauses
+ n
);
4994 ctx
.code
[clause
->try_offset
].flags
|= IL_CODE_FLAG_WAS_TARGET
;
4995 if (clause
->try_offset
+ clause
->try_len
< ctx
.code_size
)
4996 ctx
.code
[clause
->try_offset
+ clause
->try_len
].flags
|= IL_CODE_FLAG_WAS_TARGET
;
4997 if (clause
->handler_offset
+ clause
->handler_len
< ctx
.code_size
)
4998 ctx
.code
[clause
->handler_offset
+ clause
->handler_len
].flags
|= IL_CODE_FLAG_WAS_TARGET
;
5000 if (clause
->flags
== MONO_EXCEPTION_CLAUSE_NONE
) {
5001 if (!clause
->data
.catch_class
) {
5002 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Catch clause %d with invalid type", i
));
5005 if (!mono_type_is_valid_in_context (&ctx
, &clause
->data
.catch_class
->byval_arg
))
5008 init_stack_with_value_at_exception_boundary (&ctx
, ctx
.code
+ clause
->handler_offset
, clause
->data
.catch_class
);
5010 else if (clause
->flags
== MONO_EXCEPTION_CLAUSE_FILTER
) {
5011 init_stack_with_value_at_exception_boundary (&ctx
, ctx
.code
+ clause
->data
.filter_offset
, mono_defaults
.exception_class
);
5012 init_stack_with_value_at_exception_boundary (&ctx
, ctx
.code
+ clause
->handler_offset
, mono_defaults
.exception_class
);
5019 original_bb
= bb
= mono_basic_block_split (method
, &error
, ctx
.header
);
5020 if (!mono_error_ok (&error
)) {
5021 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error
)));
5022 mono_error_cleanup (&error
);
5027 while (ip
< end
&& ctx
.valid
) {
5029 ip_offset
= (guint
) (ip
- code_start
);
5031 const unsigned char *ip_copy
= ip
;
5034 if (ip_offset
> bb
->end
) {
5035 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb
->end
, ip_offset
));
5039 if (ip_offset
== bb
->end
)
5042 op_size
= mono_opcode_value_and_size (&ip_copy
, end
, &op
);
5043 if (op_size
== -1) {
5044 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip
, ip_offset
));
5048 if (ADD_IS_GREATER_OR_OVF (ip_offset
, op_size
, bb
->end
)) {
5049 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset
));
5053 /*Last Instruction*/
5054 if (ip_offset
+ op_size
== bb
->end
&& mono_opcode_is_prefix (op
)) {
5055 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Branch or EH block targets between prefix '%s' and instruction at 0x%04x", mono_opcode_name (op
), ip_offset
));
5060 ctx
.ip_offset
= ip_offset
= (guint
) (ip
- code_start
);
5062 /*We need to check against fallthrou in and out of protected blocks.
5063 * For fallout we check the once a protected block ends, if the start flag is not set.
5064 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5065 * TODO convert these checks to be done using flags and not this loop
5067 for (i
= 0; i
< ctx
.header
->num_clauses
&& ctx
.valid
; ++i
) {
5068 MonoExceptionClause
*clause
= ctx
.header
->clauses
+ i
;
5070 if ((clause
->try_offset
+ clause
->try_len
== ip_offset
) && start
== 0) {
5071 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset
));
5075 if ((clause
->handler_offset
+ clause
->handler_len
== ip_offset
) && start
== 0) {
5076 if (clause
->flags
== MONO_EXCEPTION_CLAUSE_FILTER
)
5077 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset
));
5079 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset
));
5083 if (clause
->flags
== MONO_EXCEPTION_CLAUSE_FILTER
&& clause
->handler_offset
== ip_offset
&& start
== 0) {
5084 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset
));
5088 if (clause
->handler_offset
== ip_offset
&& start
== 0) {
5089 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset
));
5093 if (clause
->try_offset
== ip_offset
&& ctx
.eval
.size
> 0 && start
== 0) {
5094 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset
));
5099 /*This must be done after fallthru detection otherwise it won't happen.*/
5101 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5102 ctx
.code
[ip_offset
].flags
|= IL_CODE_FLAG_SEEN
;
5111 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx
.target
); );
5112 merge_stacks (&ctx
, &ctx
.eval
, &ctx
.code
[ctx
.target
], FALSE
, TRUE
);
5115 merge_stacks (&ctx
, &ctx
.eval
, &ctx
.code
[ip_offset
], start
, FALSE
);
5118 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5119 #ifdef MONO_VERIFIER_DEBUG
5122 discode
= mono_disasm_code_one (NULL
, method
, ip
, NULL
);
5123 discode
[strlen (discode
) - 1] = 0; /* no \n */
5124 g_print ("[%d] %-29s (%d)\n", ip_offset
, discode
, ctx
.eval
.size
);
5127 dump_stack_state (&ctx
.code
[ip_offset
]);
5128 dump_stack_state (&ctx
.eval
);
5141 push_arg (&ctx
, *ip
- CEE_LDARG_0
, FALSE
);
5147 code_bounds_check (2);
5148 push_arg (&ctx
, ip
[1], *ip
== CEE_LDARGA_S
);
5152 case CEE_ADD_OVF_UN
:
5153 do_binop (&ctx
, *ip
, add_ovf_un_table
);
5157 case CEE_SUB_OVF_UN
:
5158 do_binop (&ctx
, *ip
, sub_ovf_un_table
);
5165 case CEE_MUL_OVF_UN
:
5166 do_binop (&ctx
, *ip
, bin_ovf_table
);
5171 do_binop (&ctx
, *ip
, add_table
);
5176 do_binop (&ctx
, *ip
, sub_table
);
5183 do_binop (&ctx
, *ip
, bin_op_table
);
5192 do_binop (&ctx
, *ip
, int_bin_op_table
);
5199 do_binop (&ctx
, *ip
, shift_op_table
);
5204 if (!check_underflow (&ctx
, 1))
5206 stack_pop_safe (&ctx
);
5220 /*TODO support definite assignment verification? */
5221 push_local (&ctx
, *ip
- CEE_LDLOC_0
, FALSE
);
5229 store_local (&ctx
, *ip
- CEE_STLOC_0
);
5234 code_bounds_check (2);
5235 store_local (&ctx
, ip
[1]);
5240 code_bounds_check (2);
5241 store_arg (&ctx
, ip
[1]);
5255 if (check_overflow (&ctx
))
5256 stack_push_val (&ctx
, TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
5261 code_bounds_check (2);
5262 if (check_overflow (&ctx
))
5263 stack_push_val (&ctx
, TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
5268 code_bounds_check (5);
5269 if (check_overflow (&ctx
))
5270 stack_push_val (&ctx
,TYPE_I4
, &mono_defaults
.int32_class
->byval_arg
);
5275 code_bounds_check (9);
5276 if (check_overflow (&ctx
))
5277 stack_push_val (&ctx
,TYPE_I8
, &mono_defaults
.int64_class
->byval_arg
);
5282 code_bounds_check (5);
5283 if (check_overflow (&ctx
))
5284 stack_push_val (&ctx
, TYPE_R8
, &mono_defaults
.double_class
->byval_arg
);
5289 code_bounds_check (9);
5290 if (check_overflow (&ctx
))
5291 stack_push_val (&ctx
, TYPE_R8
, &mono_defaults
.double_class
->byval_arg
);
5296 if (check_overflow (&ctx
))
5297 stack_push_val (&ctx
, TYPE_COMPLEX
| NULL_LITERAL_MASK
, &mono_defaults
.object_class
->byval_arg
);
5303 code_bounds_check (2);
5304 do_branch_op (&ctx
, (signed char)ip
[1] + 2, cmp_br_eq_op
);
5317 code_bounds_check (2);
5318 do_branch_op (&ctx
, (signed char)ip
[1] + 2, cmp_br_op
);
5325 code_bounds_check (5);
5326 do_branch_op (&ctx
, (gint32
)read32 (ip
+ 1) + 5, cmp_br_eq_op
);
5339 code_bounds_check (5);
5340 do_branch_op (&ctx
, (gint32
)read32 (ip
+ 1) + 5, cmp_br_op
);
5347 code_bounds_check (2);
5348 push_local (&ctx
, ip
[1], *ip
== CEE_LDLOCA_S
);
5353 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Use of the `unused' opcode"));
5359 if (!check_underflow (&ctx
, 1))
5361 if (!check_overflow (&ctx
))
5363 top
= stack_push (&ctx
);
5364 copy_stack_value (top
, stack_peek (&ctx
, 1));
5370 code_bounds_check (5);
5372 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset
));
5373 /* token = read32 (ip + 1); */
5374 if (in_any_block (ctx
.header
, ip_offset
))
5375 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset
));
5377 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx
.ip_offset
));
5379 * FIXME: check signature, retval, arguments etc.
5385 code_bounds_check (5);
5386 do_invoke_method (&ctx
, read32 (ip
+ 1), *ip
== CEE_CALLVIRT
);
5391 code_bounds_check (5);
5392 /* token = read32 (ip + 1); */
5394 * FIXME: check signature, retval, arguments etc.
5395 * FIXME: check requirements for tail call
5397 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx
.ip_offset
));
5401 code_bounds_check (2);
5402 do_static_branch (&ctx
, (signed char)ip
[1] + 2);
5410 code_bounds_check (2);
5411 do_boolean_branch_op (&ctx
, (signed char)ip
[1] + 2);
5417 code_bounds_check (5);
5418 do_static_branch (&ctx
, (gint32
)read32 (ip
+ 1) + 5);
5426 code_bounds_check (5);
5427 do_boolean_branch_op (&ctx
, (gint32
)read32 (ip
+ 1) + 5);
5434 code_bounds_check (5);
5435 entries
= read32 (ip
+ 1);
5437 if (entries
> 0xFFFFFFFFU
/ sizeof (guint32
))
5438 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries
, ctx
.ip_offset
));
5441 code_bounds_check (sizeof (guint32
) * entries
);
5443 do_switch (&ctx
, entries
, ip
);
5444 ip
+= sizeof (guint32
) * entries
;
5458 do_load_indirect (&ctx
, *ip
);
5470 do_store_indirect (&ctx
, *ip
);
5476 do_unary_math_op (&ctx
, *ip
);
5486 do_conversion (&ctx
, TYPE_I4
);
5492 do_conversion (&ctx
, TYPE_I8
);
5499 do_conversion (&ctx
, TYPE_R8
);
5505 do_conversion (&ctx
, TYPE_NATIVE_INT
);
5510 code_bounds_check (5);
5511 do_cpobj (&ctx
, read32 (ip
+ 1));
5516 code_bounds_check (5);
5517 do_ldobj_value (&ctx
, read32 (ip
+ 1));
5522 code_bounds_check (5);
5523 do_ldstr (&ctx
, read32 (ip
+ 1));
5528 code_bounds_check (5);
5529 do_newobj (&ctx
, read32 (ip
+ 1));
5535 code_bounds_check (5);
5536 do_cast (&ctx
, read32 (ip
+ 1), *ip
== CEE_CASTCLASS
? "castclass" : "isinst");
5542 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Use of the `unused' opcode"));
5547 code_bounds_check (5);
5548 do_unbox_value (&ctx
, read32 (ip
+ 1));
5560 code_bounds_check (5);
5561 do_push_field (&ctx
, read32 (ip
+ 1), *ip
== CEE_LDFLDA
);
5567 code_bounds_check (5);
5568 do_push_static_field (&ctx
, read32 (ip
+ 1), *ip
== CEE_LDSFLDA
);
5573 code_bounds_check (5);
5574 do_store_field (&ctx
, read32 (ip
+ 1));
5579 code_bounds_check (5);
5580 do_store_static_field (&ctx
, read32 (ip
+ 1));
5585 code_bounds_check (5);
5586 do_stobj (&ctx
, read32 (ip
+ 1));
5590 case CEE_CONV_OVF_I1_UN
:
5591 case CEE_CONV_OVF_I2_UN
:
5592 case CEE_CONV_OVF_I4_UN
:
5593 case CEE_CONV_OVF_U1_UN
:
5594 case CEE_CONV_OVF_U2_UN
:
5595 case CEE_CONV_OVF_U4_UN
:
5596 do_conversion (&ctx
, TYPE_I4
);
5600 case CEE_CONV_OVF_I8_UN
:
5601 case CEE_CONV_OVF_U8_UN
:
5602 do_conversion (&ctx
, TYPE_I8
);
5606 case CEE_CONV_OVF_I_UN
:
5607 case CEE_CONV_OVF_U_UN
:
5608 do_conversion (&ctx
, TYPE_NATIVE_INT
);
5613 code_bounds_check (5);
5614 do_box_value (&ctx
, read32 (ip
+ 1));
5619 code_bounds_check (5);
5620 do_newarr (&ctx
, read32 (ip
+ 1));
5630 code_bounds_check (5);
5631 do_ldelema (&ctx
, read32 (ip
+ 1));
5645 case CEE_LDELEM_REF
:
5646 do_ldelem (&ctx
, *ip
, 0);
5657 case CEE_STELEM_REF
:
5658 do_stelem (&ctx
, *ip
, 0);
5663 code_bounds_check (5);
5664 do_ldelem (&ctx
, *ip
, read32 (ip
+ 1));
5669 code_bounds_check (5);
5670 do_stelem (&ctx
, *ip
, read32 (ip
+ 1));
5675 code_bounds_check (5);
5676 do_unbox_any (&ctx
, read32 (ip
+ 1));
5680 case CEE_CONV_OVF_I1
:
5681 case CEE_CONV_OVF_U1
:
5682 case CEE_CONV_OVF_I2
:
5683 case CEE_CONV_OVF_U2
:
5684 case CEE_CONV_OVF_I4
:
5685 case CEE_CONV_OVF_U4
:
5686 do_conversion (&ctx
, TYPE_I4
);
5690 case CEE_CONV_OVF_I8
:
5691 case CEE_CONV_OVF_U8
:
5692 do_conversion (&ctx
, TYPE_I8
);
5696 case CEE_CONV_OVF_I
:
5697 case CEE_CONV_OVF_U
:
5698 do_conversion (&ctx
, TYPE_NATIVE_INT
);
5703 code_bounds_check (5);
5704 do_refanyval (&ctx
, read32 (ip
+ 1));
5714 code_bounds_check (5);
5715 do_mkrefany (&ctx
, read32 (ip
+ 1));
5720 code_bounds_check (5);
5721 do_load_token (&ctx
, read32 (ip
+ 1));
5725 case CEE_ENDFINALLY
:
5726 if (!is_correct_endfinally (ctx
.header
, ip_offset
))
5727 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx
.ip_offset
));
5734 code_bounds_check (5);
5735 do_leave (&ctx
, read32 (ip
+ 1) + 5);
5742 code_bounds_check (2);
5743 do_leave (&ctx
, (signed char)ip
[1] + 2);
5750 code_bounds_check (2);
5754 code_bounds_check (3);
5755 store_local (&ctx
, read16 (ip
+ 1));
5760 do_cmp_op (&ctx
, cmp_br_eq_op
, *ip
);
5768 do_cmp_op (&ctx
, cmp_br_op
, *ip
);
5773 code_bounds_check (3);
5774 store_arg (&ctx
, read16 (ip
+ 1) );
5780 if (!check_overflow (&ctx
))
5782 if (ctx
.signature
->call_convention
!= MONO_CALL_VARARG
)
5783 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx
.ip_offset
));
5784 set_stack_value (&ctx
, stack_push (&ctx
), &mono_defaults
.argumenthandle_class
->byval_arg
, FALSE
);
5789 code_bounds_check (5);
5790 do_load_function_ptr (&ctx
, read32 (ip
+ 1), FALSE
);
5795 code_bounds_check (5);
5796 do_load_function_ptr (&ctx
, read32 (ip
+ 1), TRUE
);
5802 code_bounds_check (3);
5803 push_arg (&ctx
, read16 (ip
+ 1), *ip
== CEE_LDARGA
);
5809 code_bounds_check (3);
5810 push_local (&ctx
, read16 (ip
+ 1), *ip
== CEE_LDLOCA
);
5823 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Use of the `unused' opcode"));
5827 do_endfilter (&ctx
);
5831 case CEE_UNALIGNED_
:
5832 code_bounds_check (2);
5833 prefix
|= PREFIX_UNALIGNED
;
5837 prefix
|= PREFIX_VOLATILE
;
5841 prefix
|= PREFIX_TAIL
;
5843 if (ip
< end
&& (*ip
!= CEE_CALL
&& *ip
!= CEE_CALLI
&& *ip
!= CEE_CALLVIRT
))
5844 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset
));
5848 code_bounds_check (5);
5849 do_initobj (&ctx
, read32 (ip
+ 1));
5853 case CEE_CONSTRAINED_
:
5854 code_bounds_check (5);
5855 ctx
.constrained_type
= get_boxable_mono_type (&ctx
, read32 (ip
+ 1), "constrained.");
5856 prefix
|= PREFIX_CONSTRAINED
;
5861 prefix
|= PREFIX_READONLY
;
5866 CLEAR_PREFIX (&ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
5867 if (!check_underflow (&ctx
, 3))
5869 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx
.ip_offset
));
5874 CLEAR_PREFIX (&ctx
, PREFIX_UNALIGNED
| PREFIX_VOLATILE
);
5875 if (!check_underflow (&ctx
, 3))
5877 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx
.ip_offset
));
5885 if (!is_correct_rethrow (ctx
.header
, ip_offset
))
5886 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx
.ip_offset
));
5893 code_bounds_check (5);
5894 do_sizeof (&ctx
, read32 (ip
+ 1));
5898 case CEE_REFANYTYPE
:
5899 do_refanytype (&ctx
);
5904 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip
, ctx
.ip_offset
));
5910 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip
, ctx
.ip_offset
));
5914 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5916 if (!ctx
.prefix_set
) //first prefix
5917 ctx
.code
[ctx
.ip_offset
].flags
|= IL_CODE_FLAG_SEEN
;
5918 ctx
.prefix_set
|= prefix
;
5919 ctx
.has_flags
= TRUE
;
5923 ctx
.code
[ctx
.ip_offset
].flags
|= IL_CODE_FLAG_SEEN
;
5925 if (ctx
.prefix_set
& PREFIX_CONSTRAINED
)
5926 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx
.ip_offset
));
5927 if (ctx
.prefix_set
& PREFIX_READONLY
)
5928 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx
.ip_offset
));
5929 if (ctx
.prefix_set
& PREFIX_VOLATILE
)
5930 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx
.ip_offset
));
5931 if (ctx
.prefix_set
& PREFIX_UNALIGNED
)
5932 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx
.ip_offset
));
5933 ctx
.prefix_set
= prefix
= 0;
5934 ctx
.has_flags
= FALSE
;
5938 * if ip != end we overflowed: mark as error.
5940 if ((ip
!= end
|| !start
) && ctx
.verifiable
&& !ctx
.list
) {
5941 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset
));
5944 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5945 for (i
= 0; i
< ctx
.code_size
&& i
< ip_offset
; ++i
) {
5946 if (ctx
.code
[i
].flags
& IL_CODE_FLAG_WAS_TARGET
) {
5947 if (!(ctx
.code
[i
].flags
& IL_CODE_FLAG_SEEN
))
5948 ADD_VERIFY_ERROR (&ctx
, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i
));
5950 if (ctx
.code
[i
].flags
& IL_CODE_DELEGATE_SEQUENCE
)
5951 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i
));
5953 if ((ctx
.code
[i
].flags
& IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL
) && ctx
.has_this_store
)
5954 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i
));
5956 if ((ctx
.code
[i
].flags
& IL_CODE_CALL_NONFINAL_VIRTUAL
) && ctx
.has_this_store
)
5957 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Invalid call to a non-final virtual function in method with stdarg.0 or ldarga.0 at 0x%04x", i
));
5960 if (mono_method_is_constructor (ctx
.method
) && !ctx
.super_ctor_called
&& !ctx
.method
->klass
->valuetype
&& ctx
.method
->klass
!= mono_defaults
.object_class
) {
5961 char *method_name
= mono_method_full_name (ctx
.method
, TRUE
);
5962 char *type
= mono_type_get_full_name (ctx
.method
->klass
);
5963 if (ctx
.method
->klass
->parent
&& mono_class_has_failure (ctx
.method
->klass
->parent
))
5964 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Constructor %s for type %s not calling base type ctor due to a TypeLoadException on base type.", method_name
, type
));
5966 CODE_NOT_VERIFIABLE (&ctx
, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name
, type
));
5967 g_free (method_name
);
5973 for (i
= 0; i
< ctx
.header
->code_size
; ++i
) {
5974 if (ctx
.code
[i
].stack
)
5975 g_free (ctx
.code
[i
].stack
);
5979 for (tmp
= ctx
.funptrs
; tmp
; tmp
= tmp
->next
)
5981 g_slist_free (ctx
.funptrs
);
5983 for (tmp
= ctx
.exception_types
; tmp
; tmp
= tmp
->next
)
5984 mono_metadata_free_type ((MonoType
*)tmp
->data
);
5985 g_slist_free (ctx
.exception_types
);
5987 for (i
= 0; i
< ctx
.num_locals
; ++i
) {
5989 mono_metadata_free_type (ctx
.locals
[i
]);
5991 for (i
= 0; i
< ctx
.max_args
; ++i
) {
5993 mono_metadata_free_type (ctx
.params
[i
]);
5997 g_free (ctx
.eval
.stack
);
6000 g_free (ctx
.locals
);
6001 g_free (ctx
.params
);
6002 mono_basic_block_free (original_bb
);
6003 mono_metadata_free_mh (ctx
.header
);
6005 finish_collect_stats ();
6010 mono_verify_corlib ()
6012 /* This is a public API function so cannot be removed */
6017 * mono_verifier_is_enabled_for_method:
6018 * @method: the method to probe
6020 * Returns TRUE if @method needs to be verified.
6024 mono_verifier_is_enabled_for_method (MonoMethod
*method
)
6026 return mono_verifier_is_enabled_for_class (method
->klass
) && (method
->wrapper_type
== MONO_WRAPPER_NONE
|| method
->wrapper_type
== MONO_WRAPPER_DYNAMIC_METHOD
);
6030 * mono_verifier_is_enabled_for_class:
6031 * @klass: The `MonoClass` to probe
6033 * Returns TRUE if @klass need to be verified.
6037 mono_verifier_is_enabled_for_class (MonoClass
*klass
)
6039 return verify_all
|| (verifier_mode
> MONO_VERIFIER_MODE_OFF
&& !(klass
->image
->assembly
&& klass
->image
->assembly
->in_gac
) && klass
->image
!= mono_defaults
.corlib
);
6043 mono_verifier_is_enabled_for_image (MonoImage
*image
)
6045 return verify_all
|| verifier_mode
> MONO_VERIFIER_MODE_OFF
;
6049 * Dynamic methods are not considered full trust since if the user is trusted and need to
6050 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6053 mono_verifier_is_method_full_trust (MonoMethod
*method
)
6055 return mono_verifier_is_class_full_trust (method
->klass
) && !method_is_dynamic (method
);
6059 * Returns if @klass is under full trust or not.
6061 * TODO This code doesn't take CAS into account.
6063 * Under verify_all all user code must be verifiable if no security option was set
6067 mono_verifier_is_class_full_trust (MonoClass
*klass
)
6069 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6070 gboolean trusted_location
= !mono_security_core_clr_enabled () ?
6071 (klass
->image
->assembly
&& klass
->image
->assembly
->in_gac
) : mono_security_core_clr_is_platform_image (klass
->image
);
6073 if (verify_all
&& verifier_mode
== MONO_VERIFIER_MODE_OFF
)
6074 return trusted_location
|| klass
->image
== mono_defaults
.corlib
;
6075 return verifier_mode
< MONO_VERIFIER_MODE_VERIFIABLE
|| trusted_location
|| klass
->image
== mono_defaults
.corlib
;
6079 mono_method_verify_with_current_settings (MonoMethod
*method
, gboolean skip_visibility
, gboolean is_fulltrust
)
6081 return mono_method_verify (method
,
6082 (verifier_mode
!= MONO_VERIFIER_MODE_STRICT
? MONO_VERIFY_NON_STRICT
: 0)
6083 | (!is_fulltrust
&& !mono_verifier_is_method_full_trust (method
) ? MONO_VERIFY_FAIL_FAST
: 0)
6084 | (skip_visibility
? MONO_VERIFY_SKIP_VISIBILITY
: 0));
6088 get_field_end (MonoClassField
*field
)
6091 int size
= mono_type_size (field
->type
, &align
);
6093 size
= 4; /*FIXME Is this a safe bet?*/
6094 return size
+ field
->offset
;
6098 verify_class_for_overlapping_reference_fields (MonoClass
*klass
)
6101 gpointer iter
= NULL
;
6102 MonoClassField
*field
;
6103 gboolean is_fulltrust
= mono_verifier_is_class_full_trust (klass
);
6104 /*We can't skip types with !has_references since this is calculated after we have run.*/
6105 if (!mono_class_is_explicit_layout (klass
))
6109 /*We must check for stuff overlapping reference fields.
6110 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6112 while ((field
= mono_class_get_fields (klass
, &iter
))) {
6113 int fieldEnd
= get_field_end (field
);
6114 gboolean is_valuetype
= !MONO_TYPE_IS_REFERENCE (field
->type
);
6117 if (mono_field_is_deleted (field
) || (field
->type
->attrs
& FIELD_ATTRIBUTE_STATIC
))
6120 int fcount
= mono_class_get_field_count (klass
);
6121 for (j
= i
; j
< fcount
; ++j
) {
6122 MonoClassField
*other
= &klass
->fields
[j
];
6123 int otherEnd
= get_field_end (other
);
6124 if (mono_field_is_deleted (other
) || (is_valuetype
&& !MONO_TYPE_IS_REFERENCE (other
->type
)) || (other
->type
->attrs
& FIELD_ATTRIBUTE_STATIC
))
6127 if (!is_valuetype
&& MONO_TYPE_IS_REFERENCE (other
->type
) && field
->offset
== other
->offset
&& is_fulltrust
)
6130 if ((otherEnd
> field
->offset
&& otherEnd
<= fieldEnd
) || (other
->offset
>= field
->offset
&& other
->offset
< fieldEnd
))
6138 field_hash (gconstpointer key
)
6140 const MonoClassField
*field
= (const MonoClassField
*)key
;
6141 return g_str_hash (field
->name
) ^ mono_metadata_type_hash (field
->type
); /**/
6145 field_equals (gconstpointer _a
, gconstpointer _b
)
6147 const MonoClassField
*a
= (const MonoClassField
*)_a
;
6148 const MonoClassField
*b
= (const MonoClassField
*)_b
;
6149 return !strcmp (a
->name
, b
->name
) && mono_metadata_type_equal (a
->type
, b
->type
);
6154 verify_class_fields (MonoClass
*klass
)
6156 gpointer iter
= NULL
;
6157 MonoClassField
*field
;
6158 MonoGenericContext
*context
= mono_class_get_context (klass
);
6159 GHashTable
*unique_fields
= g_hash_table_new_full (&field_hash
, &field_equals
, NULL
, NULL
);
6160 if (mono_class_is_gtd (klass
))
6161 context
= &mono_class_get_generic_container (klass
)->context
;
6163 while ((field
= mono_class_get_fields (klass
, &iter
)) != NULL
) {
6164 if (!mono_type_is_valid_type_in_context (field
->type
, context
)) {
6165 g_hash_table_destroy (unique_fields
);
6168 if (g_hash_table_lookup (unique_fields
, field
)) {
6169 g_hash_table_destroy (unique_fields
);
6172 g_hash_table_insert (unique_fields
, field
, field
);
6174 g_hash_table_destroy (unique_fields
);
6179 verify_interfaces (MonoClass
*klass
)
6182 for (i
= 0; i
< klass
->interface_count
; ++i
) {
6183 MonoClass
*iface
= klass
->interfaces
[i
];
6184 if (!mono_class_get_flags (iface
))
6191 verify_valuetype_layout_with_target (MonoClass
*klass
, MonoClass
*target_class
)
6194 gpointer iter
= NULL
;
6195 MonoClassField
*field
;
6196 MonoClass
*field_class
;
6198 if (!klass
->valuetype
)
6201 type
= klass
->byval_arg
.type
;
6202 /*primitive type fields are not properly decoded*/
6203 if ((type
>= MONO_TYPE_BOOLEAN
&& type
<= MONO_TYPE_R8
) || (type
>= MONO_TYPE_I
&& type
<= MONO_TYPE_U
))
6206 while ((field
= mono_class_get_fields (klass
, &iter
)) != NULL
) {
6210 if (field
->type
->attrs
& (FIELD_ATTRIBUTE_STATIC
| FIELD_ATTRIBUTE_HAS_FIELD_RVA
))
6213 field_class
= mono_class_get_generic_type_definition (mono_class_from_mono_type (field
->type
));
6215 if (field_class
== target_class
|| klass
== field_class
|| !verify_valuetype_layout_with_target (field_class
, target_class
))
6223 verify_valuetype_layout (MonoClass
*klass
)
6226 res
= verify_valuetype_layout_with_target (klass
, klass
);
6231 recursive_mark_constraint_args (MonoBitSet
*used_args
, MonoGenericContainer
*gc
, MonoType
*type
)
6234 MonoClass
**constraints
;
6235 MonoGenericParamInfo
*param_info
;
6237 g_assert (mono_type_is_generic_argument (type
));
6239 idx
= mono_type_get_generic_param_num (type
);
6240 if (mono_bitset_test_fast (used_args
, idx
))
6243 mono_bitset_set_fast (used_args
, idx
);
6244 param_info
= mono_generic_container_get_param_info (gc
, idx
);
6246 if (!param_info
->constraints
)
6249 for (constraints
= param_info
->constraints
; *constraints
; ++constraints
) {
6250 MonoClass
*ctr
= *constraints
;
6251 MonoType
*constraint_type
= &ctr
->byval_arg
;
6253 if (mono_type_is_generic_argument (constraint_type
) && !recursive_mark_constraint_args (used_args
, gc
, constraint_type
))
6260 verify_generic_parameters (MonoClass
*klass
)
6263 MonoGenericContainer
*gc
= mono_class_get_generic_container (klass
);
6264 MonoBitSet
*used_args
= mono_bitset_new (gc
->type_argc
, 0);
6266 for (i
= 0; i
< gc
->type_argc
; ++i
) {
6267 MonoGenericParamInfo
*param_info
= mono_generic_container_get_param_info (gc
, i
);
6268 MonoClass
**constraints
;
6270 if (!param_info
->constraints
)
6273 mono_bitset_clear_all (used_args
);
6274 mono_bitset_set_fast (used_args
, i
);
6276 for (constraints
= param_info
->constraints
; *constraints
; ++constraints
) {
6277 MonoClass
*ctr
= *constraints
;
6278 MonoType
*constraint_type
= &ctr
->byval_arg
;
6280 if (!mono_class_can_access_class (klass
, ctr
))
6283 if (!mono_type_is_valid_type_in_context (constraint_type
, &gc
->context
))
6286 if (mono_type_is_generic_argument (constraint_type
) && !recursive_mark_constraint_args (used_args
, gc
, constraint_type
))
6288 if (mono_class_is_ginst (ctr
) && !mono_class_is_valid_generic_instantiation (NULL
, ctr
))
6292 mono_bitset_free (used_args
);
6296 mono_bitset_free (used_args
);
6301 * Check if the class is verifiable.
6303 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6304 * field and invalid generic instantiation are fatal errors.
6306 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6310 mono_verifier_verify_class (MonoClass
*klass
)
6312 /*Neither <Module>, object or ifaces have parent.*/
6313 if (!klass
->parent
&&
6314 klass
!= mono_defaults
.object_class
&&
6315 !MONO_CLASS_IS_INTERFACE (klass
) &&
6316 (!image_is_dynamic (klass
->image
) && klass
->type_token
!= 0x2000001)) /*<Module> is the first type in the assembly*/
6318 if (klass
->parent
) {
6319 if (MONO_CLASS_IS_INTERFACE (klass
->parent
))
6321 if (!mono_class_is_ginst (klass
) && mono_class_is_gtd (klass
->parent
))
6323 if (mono_class_is_ginst (klass
->parent
) && !mono_class_is_ginst (klass
)) {
6324 MonoGenericContext
*context
= mono_class_get_context (klass
);
6325 if (mono_class_is_gtd (klass
))
6326 context
= &mono_class_get_generic_container (klass
)->context
;
6327 if (!mono_type_is_valid_type_in_context (&klass
->parent
->byval_arg
, context
))
6331 if (mono_class_is_gtd (klass
) && (mono_class_is_explicit_layout (klass
)))
6333 if (mono_class_is_gtd (klass
) && !verify_generic_parameters (klass
))
6335 if (!verify_class_for_overlapping_reference_fields (klass
))
6337 if (mono_class_is_ginst (klass
) && !mono_class_is_valid_generic_instantiation (NULL
, klass
))
6339 if (!mono_class_is_ginst (klass
) && !verify_class_fields (klass
))
6341 if (klass
->valuetype
&& !verify_valuetype_layout (klass
))
6343 if (!verify_interfaces (klass
))
6349 mono_verifier_class_is_valid_generic_instantiation (MonoClass
*klass
)
6351 return mono_class_is_valid_generic_instantiation (NULL
, klass
);
6355 mono_verifier_is_method_valid_generic_instantiation (MonoMethod
*method
)
6357 if (!method
->is_inflated
)
6359 return mono_method_is_valid_generic_instantiation (NULL
, method
);
6365 mono_verifier_verify_class (MonoClass
*klass
)
6367 /* The verifier was disabled at compile time */
6372 mono_method_verify_with_current_settings (MonoMethod
*method
, gboolean skip_visibility
, gboolean is_fulltrust
)
6374 /* The verifier was disabled at compile time */
6379 mono_verifier_is_class_full_trust (MonoClass
*klass
)
6381 /* The verifier was disabled at compile time */
6386 mono_verifier_is_method_full_trust (MonoMethod
*method
)
6388 /* The verifier was disabled at compile time */
6393 mono_verifier_is_enabled_for_image (MonoImage
*image
)
6395 /* The verifier was disabled at compile time */
6400 mono_verifier_is_enabled_for_class (MonoClass
*klass
)
6402 /* The verifier was disabled at compile time */
6407 mono_verifier_is_enabled_for_method (MonoMethod
*method
)
6409 /* The verifier was disabled at compile time */
6414 mono_method_verify (MonoMethod
*method
, int level
)
6416 /* The verifier was disabled at compile time */
6421 mono_free_verify_list (GSList
*list
)
6423 /* The verifier was disabled at compile time */
6424 /* will always be null if verifier is disabled */
6428 mono_verifier_class_is_valid_generic_instantiation (MonoClass
*klass
)
6434 mono_verifier_is_method_valid_generic_instantiation (MonoMethod
*method
)