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[metadata] Fix a possible crash when looking up a p/invoke function. (#4471)
[mono-project.git] / mono / metadata / loader.c
blobe0b18174a12eb66c15214112fdc165db20dab4e5
1 /*
2 * loader.c: Image Loader
3 *
4 * Authors:
5 * Paolo Molaro (lupus@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
8 *
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 *
13 * This file is used by the interpreter and the JIT engine to locate
14 * assemblies. Used to load AssemblyRef and later to resolve various
15 * kinds of `Refs'.
16 *
17 * TODO:
18 * This should keep track of the assembly versions that we are loading.
19 *
20 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
21 */
22 #include <config.h>
23 #include <glib.h>
24 #include <stdlib.h>
25 #include <stdio.h>
26 #include <string.h>
27 #include <mono/metadata/metadata.h>
28 #include <mono/metadata/image.h>
29 #include <mono/metadata/assembly.h>
30 #include <mono/metadata/tokentype.h>
31 #include <mono/metadata/tabledefs.h>
32 #include <mono/metadata/metadata-internals.h>
33 #include <mono/metadata/loader.h>
34 #include <mono/metadata/class-internals.h>
35 #include <mono/metadata/debug-helpers.h>
36 #include <mono/metadata/reflection.h>
37 #include <mono/metadata/profiler.h>
38 #include <mono/metadata/profiler-private.h>
39 #include <mono/metadata/exception.h>
40 #include <mono/metadata/marshal.h>
41 #include <mono/metadata/lock-tracer.h>
42 #include <mono/metadata/verify-internals.h>
43 #include <mono/utils/mono-logger-internals.h>
44 #include <mono/utils/mono-dl.h>
45 #include <mono/utils/mono-membar.h>
46 #include <mono/utils/mono-counters.h>
47 #include <mono/utils/mono-error-internals.h>
48 #include <mono/utils/mono-tls.h>
49 #include <mono/utils/mono-path.h>
50
51 MonoDefaults mono_defaults;
52
53 /*
54 * This lock protects the hash tables inside MonoImage used by the metadata
55 * loading functions in class.c and loader.c.
56 *
57 * See domain-internals.h for locking policy in combination with the
58 * domain lock.
59 */
60 static MonoCoopMutex loader_mutex;
61 static mono_mutex_t global_loader_data_mutex;
62 static gboolean loader_lock_inited;
63
64 /* Statistics */
65 static guint32 inflated_signatures_size;
66 static guint32 memberref_sig_cache_size;
67 static guint32 methods_size;
68 static guint32 signatures_size;
69
70 /*
71 * This TLS variable holds how many times the current thread has acquired the loader
72 * lock.
73 */
74 MonoNativeTlsKey loader_lock_nest_id;
75
76 static void dllmap_cleanup (void);
77
78
79 static void
80 global_loader_data_lock (void)
81 {
82 mono_locks_os_acquire (&global_loader_data_mutex, LoaderGlobalDataLock);
83 }
84
85 static void
86 global_loader_data_unlock (void)
87 {
88 mono_locks_os_release (&global_loader_data_mutex, LoaderGlobalDataLock);
89 }
90
91 void
92 mono_loader_init ()
93 {
94 static gboolean inited;
95
96 if (!inited) {
97 mono_coop_mutex_init_recursive (&loader_mutex);
98 mono_os_mutex_init_recursive (&global_loader_data_mutex);
99 loader_lock_inited = TRUE;
100
101 mono_native_tls_alloc (&loader_lock_nest_id, NULL);
102
103 mono_counters_init ();
104 mono_counters_register ("Inflated signatures size",
105 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &inflated_signatures_size);
106 mono_counters_register ("Memberref signature cache size",
107 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &memberref_sig_cache_size);
108 mono_counters_register ("MonoMethod size",
109 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &methods_size);
110 mono_counters_register ("MonoMethodSignature size",
111 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &signatures_size);
112
113 inited = TRUE;
114 }
115 }
116
117 void
118 mono_loader_cleanup (void)
119 {
120 dllmap_cleanup ();
121
122 mono_native_tls_free (loader_lock_nest_id);
123
124 mono_coop_mutex_destroy (&loader_mutex);
125 mono_os_mutex_destroy (&global_loader_data_mutex);
126 loader_lock_inited = FALSE;
127 }
128
129 /*
130 * find_cached_memberref_sig:
131 *
132 * Return a cached copy of the memberref signature identified by SIG_IDX.
133 * We use a gpointer since the cache stores both MonoTypes and MonoMethodSignatures.
134 * A cache is needed since the type/signature parsing routines allocate everything
135 * from a mempool, so without a cache, multiple requests for the same signature would
136 * lead to unbounded memory growth. For normal methods/fields this is not a problem
137 * since the resulting methods/fields are cached, but inflated methods/fields cannot
138 * be cached.
139 * LOCKING: Acquires the loader lock.
140 */
141 static gpointer
142 find_cached_memberref_sig (MonoImage *image, guint32 sig_idx)
143 {
144 gpointer res;
145
146 mono_image_lock (image);
147 res = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (sig_idx));
148 mono_image_unlock (image);
149
150 return res;
151 }
152
153 static gpointer
154 cache_memberref_sig (MonoImage *image, guint32 sig_idx, gpointer sig)
155 {
156 gpointer prev_sig;
157
158 mono_image_lock (image);
159 prev_sig = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (sig_idx));
160 if (prev_sig) {
161 /* Somebody got in before us */
162 sig = prev_sig;
163 }
164 else {
165 g_hash_table_insert (image->memberref_signatures, GUINT_TO_POINTER (sig_idx), sig);
166 /* An approximation based on glib 2.18 */
167 memberref_sig_cache_size += sizeof (gpointer) * 4;
168 }
169 mono_image_unlock (image);
170
171 return sig;
172 }
173
174 static MonoClassField*
175 field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass,
176 MonoGenericContext *context, MonoError *error)
177 {
178 MonoClass *klass = NULL;
179 MonoClassField *field;
180 MonoTableInfo *tables = image->tables;
181 MonoType *sig_type;
182 guint32 cols[6];
183 guint32 nindex, class_index;
184 const char *fname;
185 const char *ptr;
186 guint32 idx = mono_metadata_token_index (token);
187
188 error_init (error);
189
190 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
191 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
192 class_index = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
193
194 fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
195
196 if (!mono_verifier_verify_memberref_field_signature (image, cols [MONO_MEMBERREF_SIGNATURE], NULL)) {
197 mono_error_set_bad_image (error, image, "Bad field '%u' signature 0x%08x", class_index, token);
198 return NULL;
199 }
200
201 switch (class_index) {
202 case MONO_MEMBERREF_PARENT_TYPEDEF:
203 klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | nindex, error);
204 break;
205 case MONO_MEMBERREF_PARENT_TYPEREF:
206 klass = mono_class_from_typeref_checked (image, MONO_TOKEN_TYPE_REF | nindex, error);
207 break;
208 case MONO_MEMBERREF_PARENT_TYPESPEC:
209 klass = mono_class_get_and_inflate_typespec_checked (image, MONO_TOKEN_TYPE_SPEC | nindex, context, error);
210 break;
211 default:
212 mono_error_set_bad_image (error, image, "Bad field field '%u' signature 0x%08x", class_index, token);
213 }
214
215 if (!klass)
216 return NULL;
217
218 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
219 mono_metadata_decode_blob_size (ptr, &ptr);
220 /* we may want to check the signature here... */
221
222 if (*ptr++ != 0x6) {
223 mono_error_set_field_load (error, klass, fname, "Bad field signature class token %08x field name %s token %08x", class_index, fname, token);
224 return NULL;
225 }
226
227 /* FIXME: This needs a cache, especially for generic instances, since
228 * we ask mono_metadata_parse_type_checked () to allocates everything from a mempool.
229 * FIXME part2, mono_metadata_parse_type_checked actually allows for a transient type instead.
230 * FIXME part3, transient types are not 100% transient, so we need to take care of that first.
231 */
232 sig_type = (MonoType *)find_cached_memberref_sig (image, cols [MONO_MEMBERREF_SIGNATURE]);
233 if (!sig_type) {
234 MonoError inner_error;
235 sig_type = mono_metadata_parse_type_checked (image, NULL, 0, FALSE, ptr, &ptr, &inner_error);
236 if (sig_type == NULL) {
237 mono_error_set_field_load (error, klass, fname, "Could not parse field '%s' signature %08x due to: %s", fname, token, mono_error_get_message (&inner_error));
238 mono_error_cleanup (&inner_error);
239 return NULL;
240 }
241 sig_type = (MonoType *)cache_memberref_sig (image, cols [MONO_MEMBERREF_SIGNATURE], sig_type);
242 }
243
244 mono_class_init (klass); /*FIXME is this really necessary?*/
245 if (retklass)
246 *retklass = klass;
247 field = mono_class_get_field_from_name_full (klass, fname, sig_type);
248
249 if (!field) {
250 mono_error_set_field_load (error, klass, fname, "Could not find field '%s'", fname);
251 }
252
253 return field;
254 }
255
256 /*
257 * mono_field_from_token:
258 * @deprecated use the _checked variant
259 * Notes: runtime code MUST not use this function
260 */
261 MonoClassField*
262 mono_field_from_token (MonoImage *image, guint32 token, MonoClass **retklass, MonoGenericContext *context)
263 {
264 MonoError error;
265 MonoClassField *res = mono_field_from_token_checked (image, token, retklass, context, &error);
266 g_assert (mono_error_ok (&error));
267 return res;
268 }
269
270 MonoClassField*
271 mono_field_from_token_checked (MonoImage *image, guint32 token, MonoClass **retklass, MonoGenericContext *context, MonoError *error)
272 {
273 MonoClass *k;
274 guint32 type;
275 MonoClassField *field;
276
277 error_init (error);
278
279 if (image_is_dynamic (image)) {
280 MonoClassField *result;
281 MonoClass *handle_class;
282
283 *retklass = NULL;
284 MonoError inner_error;
285 result = (MonoClassField *)mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context, &inner_error);
286 mono_error_cleanup (&inner_error);
287 // This checks the memberref type as well
288 if (!result || handle_class != mono_defaults.fieldhandle_class) {
289 mono_error_set_bad_image (error, image, "Bad field token 0x%08x", token);
290 return NULL;
291 }
292 *retklass = result->parent;
293 return result;
294 }
295
296 if ((field = (MonoClassField *)mono_conc_hashtable_lookup (image->field_cache, GUINT_TO_POINTER (token)))) {
297 *retklass = field->parent;
298 return field;
299 }
300
301 if (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF) {
302 field = field_from_memberref (image, token, retklass, context, error);
303 } else {
304 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
305 if (!type) {
306 mono_error_set_bad_image (error, image, "Invalid field token 0x%08x", token);
307 return NULL;
308 }
309 k = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | type, error);
310 if (!k)
311 return NULL;
312
313 mono_class_init (k);
314 if (retklass)
315 *retklass = k;
316 field = mono_class_get_field (k, token);
317 if (!field) {
318 mono_error_set_bad_image (error, image, "Could not resolve field token 0x%08x", token);
319 }
320 }
321
322 if (field && field->parent && !mono_class_is_ginst (field->parent) && !mono_class_is_gtd (field->parent)) {
323 mono_image_lock (image);
324 mono_conc_hashtable_insert (image->field_cache, GUINT_TO_POINTER (token), field);
325 mono_image_unlock (image);
326 }
327
328 return field;
329 }
330
331 static gboolean
332 mono_metadata_signature_vararg_match (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
333 {
334 int i;
335
336 if (sig1->hasthis != sig2->hasthis ||
337 sig1->sentinelpos != sig2->sentinelpos)
338 return FALSE;
339
340 for (i = 0; i < sig1->sentinelpos; i++) {
341 MonoType *p1 = sig1->params[i];
342 MonoType *p2 = sig2->params[i];
343
344 /*if (p1->attrs != p2->attrs)
345 return FALSE;
346 */
347 if (!mono_metadata_type_equal (p1, p2))
348 return FALSE;
349 }
350
351 if (!mono_metadata_type_equal (sig1->ret, sig2->ret))
352 return FALSE;
353 return TRUE;
354 }
355
356 static MonoMethod *
357 find_method_in_class (MonoClass *klass, const char *name, const char *qname, const char *fqname,
358 MonoMethodSignature *sig, MonoClass *from_class, MonoError *error)
359 {
360 int i;
361
362 /* Search directly in the metadata to avoid calling setup_methods () */
363 error_init (error);
364
365 /* FIXME: !mono_class_is_ginst (from_class) condition causes test failures. */
366 if (klass->type_token && !image_is_dynamic (klass->image) && !klass->methods && !klass->rank && klass == from_class && !mono_class_is_ginst (from_class)) {
367 int first_idx = mono_class_get_first_method_idx (klass);
368 int mcount = mono_class_get_method_count (klass);
369 for (i = 0; i < mcount; ++i) {
370 guint32 cols [MONO_METHOD_SIZE];
371 MonoMethod *method;
372 const char *m_name;
373 MonoMethodSignature *other_sig;
374
375 mono_metadata_decode_table_row (klass->image, MONO_TABLE_METHOD, first_idx + i, cols, MONO_METHOD_SIZE);
376
377 m_name = mono_metadata_string_heap (klass->image, cols [MONO_METHOD_NAME]);
378
379 if (!((fqname && !strcmp (m_name, fqname)) ||
380 (qname && !strcmp (m_name, qname)) ||
381 (name && !strcmp (m_name, name))))
382 continue;
383
384 method = mono_get_method_checked (klass->image, MONO_TOKEN_METHOD_DEF | (first_idx + i + 1), klass, NULL, error);
385 if (!mono_error_ok (error)) //bail out if we hit a loader error
386 return NULL;
387 if (method) {
388 other_sig = mono_method_signature_checked (method, error);
389 if (!mono_error_ok (error)) //bail out if we hit a loader error
390 return NULL;
391 if (other_sig && (sig->call_convention != MONO_CALL_VARARG) && mono_metadata_signature_equal (sig, other_sig))
392 return method;
393 }
394 }
395 }
396
397 mono_class_setup_methods (klass); /* FIXME don't swallow the error here. */
398 /*
399 We can't fail lookup of methods otherwise the runtime will fail with MissingMethodException instead of TypeLoadException.
400 See mono/tests/generic-type-load-exception.2.il
401 FIXME we should better report this error to the caller
402 */
403 if (!klass->methods || mono_class_has_failure (klass)) {
404 mono_error_set_type_load_class (error, klass, "Could not find method due to a type load error"); //FIXME get the error from the class
405
406 return NULL;
407 }
408 int mcount = mono_class_get_method_count (klass);
409 for (i = 0; i < mcount; ++i) {
410 MonoMethod *m = klass->methods [i];
411 MonoMethodSignature *msig;
412
413 /* We must cope with failing to load some of the types. */
414 if (!m)
415 continue;
416
417 if (!((fqname && !strcmp (m->name, fqname)) ||
418 (qname && !strcmp (m->name, qname)) ||
419 (name && !strcmp (m->name, name))))
420 continue;
421 msig = mono_method_signature_checked (m, error);
422 if (!mono_error_ok (error)) //bail out if we hit a loader error
423 return NULL;
424
425 if (!msig)
426 continue;
427
428 if (sig->call_convention == MONO_CALL_VARARG) {
429 if (mono_metadata_signature_vararg_match (sig, msig))
430 break;
431 } else {
432 if (mono_metadata_signature_equal (sig, msig))
433 break;
434 }
435 }
436
437 if (i < mcount)
438 return mono_class_get_method_by_index (from_class, i);
439 return NULL;
440 }
441
442 static MonoMethod *
443 find_method (MonoClass *in_class, MonoClass *ic, const char* name, MonoMethodSignature *sig, MonoClass *from_class, MonoError *error)
444 {
445 int i;
446 char *qname, *fqname, *class_name;
447 gboolean is_interface;
448 MonoMethod *result = NULL;
449 MonoClass *initial_class = in_class;
450
451 error_init (error);
452 is_interface = MONO_CLASS_IS_INTERFACE (in_class);
453
454 if (ic) {
455 class_name = mono_type_get_name_full (&ic->byval_arg, MONO_TYPE_NAME_FORMAT_IL);
456
457 qname = g_strconcat (class_name, ".", name, NULL);
458 if (ic->name_space && ic->name_space [0])
459 fqname = g_strconcat (ic->name_space, ".", class_name, ".", name, NULL);
460 else
461 fqname = NULL;
462 } else
463 class_name = qname = fqname = NULL;
464
465 while (in_class) {
466 g_assert (from_class);
467 result = find_method_in_class (in_class, name, qname, fqname, sig, from_class, error);
468 if (result || !mono_error_ok (error))
469 goto out;
470
471 if (name [0] == '.' && (!strcmp (name, ".ctor") || !strcmp (name, ".cctor")))
472 break;
473
474 /*
475 * This happens when we fail to lazily load the interfaces of one of the types.
476 * On such case we can't just bail out since user code depends on us trying harder.
477 */
478 if (from_class->interface_offsets_count != in_class->interface_offsets_count) {
479 in_class = in_class->parent;
480 from_class = from_class->parent;
481 continue;
482 }
483
484 for (i = 0; i < in_class->interface_offsets_count; i++) {
485 MonoClass *in_ic = in_class->interfaces_packed [i];
486 MonoClass *from_ic = from_class->interfaces_packed [i];
487 char *ic_qname, *ic_fqname, *ic_class_name;
488
489 ic_class_name = mono_type_get_name_full (&in_ic->byval_arg, MONO_TYPE_NAME_FORMAT_IL);
490 ic_qname = g_strconcat (ic_class_name, ".", name, NULL);
491 if (in_ic->name_space && in_ic->name_space [0])
492 ic_fqname = g_strconcat (in_ic->name_space, ".", ic_class_name, ".", name, NULL);
493 else
494 ic_fqname = NULL;
495
496 result = find_method_in_class (in_ic, ic ? name : NULL, ic_qname, ic_fqname, sig, from_ic, error);
497 g_free (ic_class_name);
498 g_free (ic_fqname);
499 g_free (ic_qname);
500 if (result || !mono_error_ok (error))
501 goto out;
502 }
503
504 in_class = in_class->parent;
505 from_class = from_class->parent;
506 }
507 g_assert (!in_class == !from_class);
508
509 if (is_interface)
510 result = find_method_in_class (mono_defaults.object_class, name, qname, fqname, sig, mono_defaults.object_class, error);
511
512 //we did not find the method
513 if (!result && mono_error_ok (error)) {
514 char *desc = mono_signature_get_desc (sig, FALSE);
515 mono_error_set_method_load (error, initial_class, name, "Could not find method with signature %s", desc);
516 g_free (desc);
517 }
518
519 out:
520 g_free (class_name);
521 g_free (fqname);
522 g_free (qname);
523 return result;
524 }
525
526 static MonoMethodSignature*
527 inflate_generic_signature_checked (MonoImage *image, MonoMethodSignature *sig, MonoGenericContext *context, MonoError *error)
528 {
529 MonoMethodSignature *res;
530 gboolean is_open;
531 int i;
532
533 error_init (error);
534 if (!context)
535 return sig;
536
537 res = (MonoMethodSignature *)g_malloc0 (MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)sig->param_count) * sizeof (MonoType*));
538 res->param_count = sig->param_count;
539 res->sentinelpos = -1;
540 res->ret = mono_class_inflate_generic_type_checked (sig->ret, context, error);
541 if (!mono_error_ok (error))
542 goto fail;
543 is_open = mono_class_is_open_constructed_type (res->ret);
544 for (i = 0; i < sig->param_count; ++i) {
545 res->params [i] = mono_class_inflate_generic_type_checked (sig->params [i], context, error);
546 if (!mono_error_ok (error))
547 goto fail;
548
549 if (!is_open)
550 is_open = mono_class_is_open_constructed_type (res->params [i]);
551 }
552 res->hasthis = sig->hasthis;
553 res->explicit_this = sig->explicit_this;
554 res->call_convention = sig->call_convention;
555 res->pinvoke = sig->pinvoke;
556 res->generic_param_count = sig->generic_param_count;
557 res->sentinelpos = sig->sentinelpos;
558 res->has_type_parameters = is_open;
559 res->is_inflated = 1;
560 return res;
561
562 fail:
563 if (res->ret)
564 mono_metadata_free_type (res->ret);
565 for (i = 0; i < sig->param_count; ++i) {
566 if (res->params [i])
567 mono_metadata_free_type (res->params [i]);
568 }
569 g_free (res);
570 return NULL;
571 }
572
573 /*
574 * mono_inflate_generic_signature:
575 *
576 * Inflate SIG with CONTEXT, and return a canonical copy. On error, set ERROR, and return NULL.
577 */
578 MonoMethodSignature*
579 mono_inflate_generic_signature (MonoMethodSignature *sig, MonoGenericContext *context, MonoError *error)
580 {
581 MonoMethodSignature *res, *cached;
582
583 res = inflate_generic_signature_checked (NULL, sig, context, error);
584 if (!mono_error_ok (error))
585 return NULL;
586 cached = mono_metadata_get_inflated_signature (res, context);
587 if (cached != res)
588 mono_metadata_free_inflated_signature (res);
589 return cached;
590 }
591
592 static MonoMethodHeader*
593 inflate_generic_header (MonoMethodHeader *header, MonoGenericContext *context, MonoError *error)
594 {
595 size_t locals_size = sizeof (gpointer) * header->num_locals;
596 size_t clauses_size = header->num_clauses * sizeof (MonoExceptionClause);
597 size_t header_size = MONO_SIZEOF_METHOD_HEADER + locals_size + clauses_size;
598 MonoMethodHeader *res = (MonoMethodHeader *)g_malloc0 (header_size);
599 res->num_locals = header->num_locals;
600 res->clauses = (MonoExceptionClause *) &res->locals [res->num_locals] ;
601 memcpy (res->clauses, header->clauses, clauses_size);
602
603 res->code = header->code;
604 res->code_size = header->code_size;
605 res->max_stack = header->max_stack;
606 res->num_clauses = header->num_clauses;
607 res->init_locals = header->init_locals;
608
609 res->is_transient = TRUE;
610
611 error_init (error);
612
613 for (int i = 0; i < header->num_locals; ++i) {
614 res->locals [i] = mono_class_inflate_generic_type_checked (header->locals [i], context, error);
615 if (!is_ok (error))
616 goto fail;
617 }
618 if (res->num_clauses) {
619 for (int i = 0; i < header->num_clauses; ++i) {
620 MonoExceptionClause *clause = &res->clauses [i];
621 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE)
622 continue;
623 clause->data.catch_class = mono_class_inflate_generic_class_checked (clause->data.catch_class, context, error);
624 if (!is_ok (error))
625 goto fail;
626 }
627 }
628 return res;
629 fail:
630 g_free (res);
631 return NULL;
632 }
633
634 /*
635 * token is the method_ref/def/spec token used in a call IL instruction.
636 * @deprecated use the _checked variant
637 * Notes: runtime code MUST not use this function
638 */
639 MonoMethodSignature*
640 mono_method_get_signature_full (MonoMethod *method, MonoImage *image, guint32 token, MonoGenericContext *context)
641 {
642 MonoError error;
643 MonoMethodSignature *res = mono_method_get_signature_checked (method, image, token, context, &error);
644 mono_error_cleanup (&error);
645 return res;
646 }
647
648 MonoMethodSignature*
649 mono_method_get_signature_checked (MonoMethod *method, MonoImage *image, guint32 token, MonoGenericContext *context, MonoError *error)
650 {
651 int table = mono_metadata_token_table (token);
652 int idx = mono_metadata_token_index (token);
653 int sig_idx;
654 guint32 cols [MONO_MEMBERREF_SIZE];
655 MonoMethodSignature *sig;
656 const char *ptr;
657
658 error_init (error);
659
660 /* !table is for wrappers: we should really assign their own token to them */
661 if (!table || table == MONO_TABLE_METHOD)
662 return mono_method_signature_checked (method, error);
663
664 if (table == MONO_TABLE_METHODSPEC) {
665 /* the verifier (do_invoke_method) will turn the NULL into a verifier error */
666 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) || !method->is_inflated) {
667 mono_error_set_bad_image (error, image, "Method is a pinvoke or open generic");
668 return NULL;
669 }
670
671 return mono_method_signature_checked (method, error);
672 }
673
674 if (mono_class_is_ginst (method->klass))
675 return mono_method_signature_checked (method, error);
676
677 if (image_is_dynamic (image)) {
678 sig = mono_reflection_lookup_signature (image, method, token, error);
679 if (!sig)
680 return NULL;
681 } else {
682 mono_metadata_decode_row (&image->tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
683 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
684
685 sig = (MonoMethodSignature *)find_cached_memberref_sig (image, sig_idx);
686 if (!sig) {
687 if (!mono_verifier_verify_memberref_method_signature (image, sig_idx, NULL)) {
688 guint32 klass = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
689 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
690
691 //FIXME include the verification error
692 mono_error_set_bad_image (error, image, "Bad method signature class token 0x%08x field name %s token 0x%08x", klass, fname, token);
693 return NULL;
694 }
695
696 ptr = mono_metadata_blob_heap (image, sig_idx);
697 mono_metadata_decode_blob_size (ptr, &ptr);
698
699 sig = mono_metadata_parse_method_signature_full (image, NULL, 0, ptr, NULL, error);
700 if (!sig)
701 return NULL;
702
703 sig = (MonoMethodSignature *)cache_memberref_sig (image, sig_idx, sig);
704 }
705 /* FIXME: we probably should verify signature compat in the dynamic case too*/
706 if (!mono_verifier_is_sig_compatible (image, method, sig)) {
707 guint32 klass = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
708 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
709
710 mono_error_set_bad_image (error, image, "Incompatible method signature class token 0x%08x field name %s token 0x%08x", klass, fname, token);
711 return NULL;
712 }
713 }
714
715 if (context) {
716 MonoMethodSignature *cached;
717
718 /* This signature is not owned by a MonoMethod, so need to cache */
719 sig = inflate_generic_signature_checked (image, sig, context, error);
720 if (!mono_error_ok (error))
721 return NULL;
722
723 cached = mono_metadata_get_inflated_signature (sig, context);
724 if (cached != sig)
725 mono_metadata_free_inflated_signature (sig);
726 else
727 inflated_signatures_size += mono_metadata_signature_size (cached);
728 sig = cached;
729 }
730
731 g_assert (mono_error_ok (error));
732 return sig;
733 }
734
735 /*
736 * token is the method_ref/def/spec token used in a call IL instruction.
737 * @deprecated use the _checked variant
738 * Notes: runtime code MUST not use this function
739 */
740 MonoMethodSignature*
741 mono_method_get_signature (MonoMethod *method, MonoImage *image, guint32 token)
742 {
743 MonoError error;
744 MonoMethodSignature *res = mono_method_get_signature_checked (method, image, token, NULL, &error);
745 mono_error_cleanup (&error);
746 return res;
747 }
748
749 /* this is only for the typespec array methods */
750 MonoMethod*
751 mono_method_search_in_array_class (MonoClass *klass, const char *name, MonoMethodSignature *sig)
752 {
753 int i;
754
755 mono_class_setup_methods (klass);
756 g_assert (!mono_class_has_failure (klass)); /*FIXME this should not fail, right?*/
757 int mcount = mono_class_get_method_count (klass);
758 for (i = 0; i < mcount; ++i) {
759 MonoMethod *method = klass->methods [i];
760 if (strcmp (method->name, name) == 0 && sig->param_count == method->signature->param_count)
761 return method;
762 }
763 return NULL;
764 }
765
766 static MonoMethod *
767 method_from_memberref (MonoImage *image, guint32 idx, MonoGenericContext *typespec_context,
768 gboolean *used_context, MonoError *error)
769 {
770 MonoClass *klass = NULL;
771 MonoMethod *method = NULL;
772 MonoTableInfo *tables = image->tables;
773 guint32 cols[6];
774 guint32 nindex, class_index, sig_idx;
775 const char *mname;
776 MonoMethodSignature *sig;
777 const char *ptr;
778
779 error_init (error);
780
781 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
782 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
783 class_index = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
784 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
785 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
786
787 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
788
789 /*
790 * Whether we actually used the `typespec_context' or not.
791 * This is used to tell our caller whether or not it's safe to insert the returned
792 * method into a cache.
793 */
794 if (used_context)
795 *used_context = class_index == MONO_MEMBERREF_PARENT_TYPESPEC;
796
797 switch (class_index) {
798 case MONO_MEMBERREF_PARENT_TYPEREF:
799 klass = mono_class_from_typeref_checked (image, MONO_TOKEN_TYPE_REF | nindex, error);
800 if (!klass)
801 goto fail;
802 break;
803 case MONO_MEMBERREF_PARENT_TYPESPEC:
804 /*
805 * Parse the TYPESPEC in the parent's context.
806 */
807 klass = mono_class_get_and_inflate_typespec_checked (image, MONO_TOKEN_TYPE_SPEC | nindex, typespec_context, error);
808 if (!klass)
809 goto fail;
810 break;
811 case MONO_MEMBERREF_PARENT_TYPEDEF:
812 klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | nindex, error);
813 if (!klass)
814 goto fail;
815 break;
816 case MONO_MEMBERREF_PARENT_METHODDEF: {
817 method = mono_get_method_checked (image, MONO_TOKEN_METHOD_DEF | nindex, NULL, NULL, error);
818 if (!method)
819 goto fail;
820 return method;
821 }
822 default:
823 mono_error_set_bad_image (error, image, "Memberref parent unknown: class: %d, index %d", class_index, nindex);
824 goto fail;
825 }
826
827 g_assert (klass);
828 mono_class_init (klass);
829
830 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
831
832 if (!mono_verifier_verify_memberref_method_signature (image, sig_idx, NULL)) {
833 mono_error_set_method_load (error, klass, mname, "Verifier rejected method signature");
834 goto fail;
835 }
836
837 ptr = mono_metadata_blob_heap (image, sig_idx);
838 mono_metadata_decode_blob_size (ptr, &ptr);
839
840 sig = (MonoMethodSignature *)find_cached_memberref_sig (image, sig_idx);
841 if (!sig) {
842 sig = mono_metadata_parse_method_signature_full (image, NULL, 0, ptr, NULL, error);
843 if (sig == NULL)
844 goto fail;
845
846 sig = (MonoMethodSignature *)cache_memberref_sig (image, sig_idx, sig);
847 }
848
849 switch (class_index) {
850 case MONO_MEMBERREF_PARENT_TYPEREF:
851 case MONO_MEMBERREF_PARENT_TYPEDEF:
852 method = find_method (klass, NULL, mname, sig, klass, error);
853 break;
854
855 case MONO_MEMBERREF_PARENT_TYPESPEC: {
856 MonoType *type;
857
858 type = &klass->byval_arg;
859
860 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
861 MonoClass *in_class = mono_class_is_ginst (klass) ? mono_class_get_generic_class (klass)->container_class : klass;
862 method = find_method (in_class, NULL, mname, sig, klass, error);
863 break;
864 }
865
866 /* we're an array and we created these methods already in klass in mono_class_init () */
867 method = mono_method_search_in_array_class (klass, mname, sig);
868 break;
869 }
870 default:
871 mono_error_set_bad_image (error, image,"Memberref parent unknown: class: %d, index %d", class_index, nindex);
872 goto fail;
873 }
874
875 if (!method && mono_error_ok (error)) {
876 char *msig = mono_signature_get_desc (sig, FALSE);
877 GString *s = g_string_new (mname);
878 if (sig->generic_param_count)
879 g_string_append_printf (s, "<[%d]>", sig->generic_param_count);
880 g_string_append_printf (s, "(%s)", msig);
881 g_free (msig);
882 msig = g_string_free (s, FALSE);
883
884 mono_error_set_method_load (error, klass, mname, "Could not find method %s", msig);
885
886 g_free (msig);
887 }
888
889 return method;
890
891 fail:
892 g_assert (!mono_error_ok (error));
893 return NULL;
894 }
895
896 static MonoMethod *
897 method_from_methodspec (MonoImage *image, MonoGenericContext *context, guint32 idx, MonoError *error)
898 {
899 MonoMethod *method;
900 MonoClass *klass;
901 MonoTableInfo *tables = image->tables;
902 MonoGenericContext new_context;
903 MonoGenericInst *inst;
904 const char *ptr;
905 guint32 cols [MONO_METHODSPEC_SIZE];
906 guint32 token, nindex, param_count;
907
908 error_init (error);
909
910 mono_metadata_decode_row (&tables [MONO_TABLE_METHODSPEC], idx - 1, cols, MONO_METHODSPEC_SIZE);
911 token = cols [MONO_METHODSPEC_METHOD];
912 nindex = token >> MONO_METHODDEFORREF_BITS;
913
914 if (!mono_verifier_verify_methodspec_signature (image, cols [MONO_METHODSPEC_SIGNATURE], NULL)) {
915 mono_error_set_bad_image (error, image, "Bad method signals signature 0x%08x", idx);
916 return NULL;
917 }
918
919 ptr = mono_metadata_blob_heap (image, cols [MONO_METHODSPEC_SIGNATURE]);
920
921 mono_metadata_decode_value (ptr, &ptr);
922 ptr++;
923 param_count = mono_metadata_decode_value (ptr, &ptr);
924
925 inst = mono_metadata_parse_generic_inst (image, NULL, param_count, ptr, &ptr, error);
926 if (!inst)
927 return NULL;
928
929 if (context && inst->is_open) {
930 inst = mono_metadata_inflate_generic_inst (inst, context, error);
931 if (!mono_error_ok (error))
932 return NULL;
933 }
934
935 if ((token & MONO_METHODDEFORREF_MASK) == MONO_METHODDEFORREF_METHODDEF) {
936 method = mono_get_method_checked (image, MONO_TOKEN_METHOD_DEF | nindex, NULL, context, error);
937 if (!method)
938 return NULL;
939 } else {
940 method = method_from_memberref (image, nindex, context, NULL, error);
941 }
942
943 if (!method)
944 return NULL;
945
946 klass = method->klass;
947
948 if (mono_class_is_ginst (klass)) {
949 g_assert (method->is_inflated);
950 method = ((MonoMethodInflated *) method)->declaring;
951 }
952
953 new_context.class_inst = mono_class_is_ginst (klass) ? mono_class_get_generic_class (klass)->context.class_inst : NULL;
954 new_context.method_inst = inst;
955
956 method = mono_class_inflate_generic_method_full_checked (method, klass, &new_context, error);
957 return method;
958 }
959
960 struct _MonoDllMap {
961 char *dll;
962 char *target;
963 char *func;
964 char *target_func;
965 MonoDllMap *next;
966 };
967
968 static MonoDllMap *global_dll_map;
969
970 static int
971 mono_dllmap_lookup_list (MonoDllMap *dll_map, const char *dll, const char* func, const char **rdll, const char **rfunc) {
972 int found = 0;
973
974 *rdll = dll;
975
976 if (!dll_map)
977 return 0;
978
979 global_loader_data_lock ();
980
981 /*
982 * we use the first entry we find that matches, since entries from
983 * the config file are prepended to the list and we document that the
984 * later entries win.
985 */
986 for (; dll_map; dll_map = dll_map->next) {
987 if (dll_map->dll [0] == 'i' && dll_map->dll [1] == ':') {
988 if (g_ascii_strcasecmp (dll_map->dll + 2, dll))
989 continue;
990 } else if (strcmp (dll_map->dll, dll)) {
991 continue;
992 }
993 if (!found && dll_map->target) {
994 *rdll = dll_map->target;
995 found = 1;
996 /* we don't quit here, because we could find a full
997 * entry that matches also function and that has priority.
998 */
999 }
1000 if (dll_map->func && strcmp (dll_map->func, func) == 0) {
1001 *rdll = dll_map->target;
1002 *rfunc = dll_map->target_func;
1003 break;
1004 }
1005 }
1006
1007 global_loader_data_unlock ();
1008 return found;
1009 }
1010
1011 static int
1012 mono_dllmap_lookup (MonoImage *assembly, const char *dll, const char* func, const char **rdll, const char **rfunc)
1013 {
1014 int res;
1015 if (assembly && assembly->dll_map) {
1016 res = mono_dllmap_lookup_list (assembly->dll_map, dll, func, rdll, rfunc);
1017 if (res)
1018 return res;
1019 }
1020 return mono_dllmap_lookup_list (global_dll_map, dll, func, rdll, rfunc);
1021 }
1022
1023 /**
1024 * mono_dllmap_insert:
1025 * @assembly: if NULL, this is a global mapping, otherwise the remapping of the dynamic library will only apply to the specified assembly
1026 * @dll: The name of the external library, as it would be found in the DllImport declaration. If prefixed with 'i:' the matching of the library name is done without case sensitivity
1027 * @func: if not null, the mapping will only applied to the named function (the value of EntryPoint)
1028 * @tdll: The name of the library to map the specified @dll if it matches.
1029 * @tfunc: The name of the function that replaces the invocation. If NULL, it is replaced with a copy of @func.
1030 *
1031 * LOCKING: Acquires the loader lock.
1032 *
1033 * This function is used to programatically add DllImport remapping in either
1034 * a specific assembly, or as a global remapping. This is done by remapping
1035 * references in a DllImport attribute from the @dll library name into the @tdll
1036 * name. If the @dll name contains the prefix "i:", the comparison of the
1037 * library name is done without case sensitivity.
1038 *
1039 * If you pass @func, this is the name of the EntryPoint in a DllImport if specified
1040 * or the name of the function as determined by DllImport. If you pass @func, you
1041 * must also pass @tfunc which is the name of the target function to invoke on a match.
1042 *
1043 * Example:
1044 * mono_dllmap_insert (NULL, "i:libdemo.dll", NULL, relocated_demo_path, NULL);
1045 *
1046 * The above will remap DllImport statments for "libdemo.dll" and "LIBDEMO.DLL" to
1047 * the contents of relocated_demo_path for all assemblies in the Mono process.
1048 *
1049 * NOTE: This can be called before the runtime is initialized, for example from
1050 * mono_config_parse ().
1051 */
1052 void
1053 mono_dllmap_insert (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfunc)
1054 {
1055 MonoDllMap *entry;
1056
1057 mono_loader_init ();
1058
1059 if (!assembly) {
1060 entry = (MonoDllMap *)g_malloc0 (sizeof (MonoDllMap));
1061 entry->dll = dll? g_strdup (dll): NULL;
1062 entry->target = tdll? g_strdup (tdll): NULL;
1063 entry->func = func? g_strdup (func): NULL;
1064 entry->target_func = tfunc? g_strdup (tfunc): (func? g_strdup (func): NULL);
1065
1066 global_loader_data_lock ();
1067 entry->next = global_dll_map;
1068 global_dll_map = entry;
1069 global_loader_data_unlock ();
1070 } else {
1071 entry = (MonoDllMap *)mono_image_alloc0 (assembly, sizeof (MonoDllMap));
1072 entry->dll = dll? mono_image_strdup (assembly, dll): NULL;
1073 entry->target = tdll? mono_image_strdup (assembly, tdll): NULL;
1074 entry->func = func? mono_image_strdup (assembly, func): NULL;
1075 entry->target_func = tfunc? mono_image_strdup (assembly, tfunc): (func? mono_image_strdup (assembly, func): NULL);
1076
1077 mono_image_lock (assembly);
1078 entry->next = assembly->dll_map;
1079 assembly->dll_map = entry;
1080 mono_image_unlock (assembly);
1081 }
1082 }
1083
1084 static void
1085 free_dllmap (MonoDllMap *map)
1086 {
1087 while (map) {
1088 MonoDllMap *next = map->next;
1089
1090 g_free (map->dll);
1091 g_free (map->target);
1092 g_free (map->func);
1093 g_free (map->target_func);
1094 g_free (map);
1095 map = next;
1096 }
1097 }
1098
1099 static void
1100 dllmap_cleanup (void)
1101 {
1102 free_dllmap (global_dll_map);
1103 global_dll_map = NULL;
1104 }
1105
1106 static GHashTable *global_module_map;
1107
1108 static MonoDl*
1109 cached_module_load (const char *name, int flags, char **err)
1110 {
1111 MonoDl *res;
1112
1113 if (err)
1114 *err = NULL;
1115 global_loader_data_lock ();
1116 if (!global_module_map)
1117 global_module_map = g_hash_table_new (g_str_hash, g_str_equal);
1118 res = (MonoDl *)g_hash_table_lookup (global_module_map, name);
1119 if (res) {
1120 global_loader_data_unlock ();
1121 return res;
1122 }
1123 res = mono_dl_open (name, flags, err);
1124 if (res)
1125 g_hash_table_insert (global_module_map, g_strdup (name), res);
1126 global_loader_data_unlock ();
1127 return res;
1128 }
1129
1130 void
1131 mono_loader_register_module (const char *name, MonoDl *module)
1132 {
1133 if (!global_module_map)
1134 global_module_map = g_hash_table_new (g_str_hash, g_str_equal);
1135 g_hash_table_insert (global_module_map, g_strdup (name), module);
1136 }
1137
1138 static MonoDl *internal_module;
1139
1140 static gboolean
1141 is_absolute_path (const char *path)
1142 {
1143 #ifdef PLATFORM_MACOSX
1144 if (!strncmp (path, "@executable_path/", 17) || !strncmp (path, "@loader_path/", 13) ||
1145 !strncmp (path, "@rpath/", 7))
1146 return TRUE;
1147 #endif
1148 return g_path_is_absolute (path);
1149 }
1150
1151 gpointer
1152 mono_lookup_pinvoke_call (MonoMethod *method, const char **exc_class, const char **exc_arg)
1153 {
1154 MonoImage *image = method->klass->image;
1155 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
1156 MonoTableInfo *tables = image->tables;
1157 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
1158 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
1159 guint32 im_cols [MONO_IMPLMAP_SIZE];
1160 guint32 scope_token;
1161 const char *import = NULL;
1162 const char *orig_scope;
1163 const char *new_scope;
1164 char *error_msg;
1165 char *full_name, *file_name, *found_name = NULL;
1166 int i,j;
1167 MonoDl *module = NULL;
1168 gboolean cached = FALSE;
1169 gpointer addr = NULL;
1170
1171 g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
1172
1173 if (exc_class) {
1174 *exc_class = NULL;
1175 *exc_arg = NULL;
1176 }
1177
1178 if (piinfo->addr)
1179 return piinfo->addr;
1180
1181 if (image_is_dynamic (method->klass->image)) {
1182 MonoReflectionMethodAux *method_aux =
1183 (MonoReflectionMethodAux *)g_hash_table_lookup (
1184 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1185 if (!method_aux)
1186 return NULL;
1187
1188 import = method_aux->dllentry;
1189 orig_scope = method_aux->dll;
1190 }
1191 else {
1192 if (!piinfo->implmap_idx || piinfo->implmap_idx > im->rows)
1193 return NULL;
1194
1195 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
1196
1197 if (!im_cols [MONO_IMPLMAP_SCOPE] || im_cols [MONO_IMPLMAP_SCOPE] > mr->rows)
1198 return NULL;
1199
1200 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
1201 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
1202 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
1203 orig_scope = mono_metadata_string_heap (image, scope_token);
1204 }
1205
1206 mono_dllmap_lookup (image, orig_scope, import, &new_scope, &import);
1207
1208 if (!module) {
1209 mono_image_lock (image);
1210 if (!image->pinvoke_scopes) {
1211 image->pinvoke_scopes = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
1212 image->pinvoke_scope_filenames = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1213 }
1214 module = (MonoDl *)g_hash_table_lookup (image->pinvoke_scopes, new_scope);
1215 found_name = (char *)g_hash_table_lookup (image->pinvoke_scope_filenames, new_scope);
1216 mono_image_unlock (image);
1217 if (module)
1218 cached = TRUE;
1219 if (found_name)
1220 found_name = g_strdup (found_name);
1221 }
1222
1223 if (!module) {
1224 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1225 "DllImport attempting to load: '%s'.", new_scope);
1226
1227 /* we allow a special name to dlopen from the running process namespace */
1228 if (strcmp (new_scope, "__Internal") == 0){
1229 if (internal_module == NULL)
1230 internal_module = mono_dl_open (NULL, MONO_DL_LAZY, &error_msg);
1231 module = internal_module;
1232 }
1233 }
1234
1235 /*
1236 * Try loading the module using a variety of names
1237 */
1238 for (i = 0; i < 5; ++i) {
1239 char *base_name = NULL, *dir_name = NULL;
1240 gboolean is_absolute = is_absolute_path (new_scope);
1241
1242 switch (i) {
1243 case 0:
1244 /* Try the original name */
1245 file_name = g_strdup (new_scope);
1246 break;
1247 case 1:
1248 /* Try trimming the .dll extension */
1249 if (strstr (new_scope, ".dll") == (new_scope + strlen (new_scope) - 4)) {
1250 file_name = g_strdup (new_scope);
1251 file_name [strlen (new_scope) - 4] = '\0';
1252 }
1253 else
1254 continue;
1255 break;
1256 case 2:
1257 if (is_absolute) {
1258 dir_name = g_path_get_dirname (new_scope);
1259 base_name = g_path_get_basename (new_scope);
1260 if (strstr (base_name, "lib") != base_name) {
1261 char *tmp = g_strdup_printf ("lib%s", base_name);
1262 g_free (base_name);
1263 base_name = tmp;
1264 file_name = g_strdup_printf ("%s%s%s", dir_name, G_DIR_SEPARATOR_S, base_name);
1265 break;
1266 }
1267 } else if (strstr (new_scope, "lib") != new_scope) {
1268 file_name = g_strdup_printf ("lib%s", new_scope);
1269 break;
1270 }
1271 continue;
1272 case 3:
1273 if (!is_absolute && mono_dl_get_system_dir ()) {
1274 dir_name = (char*)mono_dl_get_system_dir ();
1275 file_name = g_path_get_basename (new_scope);
1276 base_name = NULL;
1277 } else
1278 continue;
1279 break;
1280 default:
1281 #ifndef TARGET_WIN32
1282 if (!g_ascii_strcasecmp ("user32.dll", new_scope) ||
1283 !g_ascii_strcasecmp ("kernel32.dll", new_scope) ||
1284 !g_ascii_strcasecmp ("user32", new_scope) ||
1285 !g_ascii_strcasecmp ("kernel", new_scope)) {
1286 file_name = g_strdup ("libMonoSupportW.so");
1287 } else
1288 #endif
1289 continue;
1290 #ifndef TARGET_WIN32
1291 break;
1292 #endif
1293 }
1294
1295 if (is_absolute) {
1296 if (!dir_name)
1297 dir_name = g_path_get_dirname (file_name);
1298 if (!base_name)
1299 base_name = g_path_get_basename (file_name);
1300 }
1301
1302 if (!module && is_absolute) {
1303 module = cached_module_load (file_name, MONO_DL_LAZY, &error_msg);
1304 if (!module) {
1305 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1306 "DllImport error loading library '%s': '%s'.",
1307 file_name, error_msg);
1308 g_free (error_msg);
1309 } else {
1310 found_name = g_strdup (file_name);
1311 }
1312 }
1313
1314 if (!module && !is_absolute) {
1315 void *iter;
1316 char *mdirname;
1317
1318 for (j = 0; j < 3; ++j) {
1319 iter = NULL;
1320 mdirname = NULL;
1321 switch (j) {
1322 case 0:
1323 mdirname = g_path_get_dirname (image->name);
1324 break;
1325 case 1: /* @executable_path@/../lib */
1326 {
1327 char buf [4096];
1328 int binl;
1329 binl = mono_dl_get_executable_path (buf, sizeof (buf));
1330 if (binl != -1) {
1331 char *base, *newbase;
1332 char *resolvedname;
1333 buf [binl] = 0;
1334 resolvedname = mono_path_resolve_symlinks (buf);
1335
1336 base = g_path_get_dirname (resolvedname);
1337 newbase = g_path_get_dirname(base);
1338 mdirname = g_strdup_printf ("%s/lib", newbase);
1339
1340 g_free (resolvedname);
1341 g_free (base);
1342 g_free (newbase);
1343 }
1344 break;
1345 }
1346 #ifdef __MACH__
1347 case 2: /* @executable_path@/../Libraries */
1348 {
1349 char buf [4096];
1350 int binl;
1351 binl = mono_dl_get_executable_path (buf, sizeof (buf));
1352 if (binl != -1) {
1353 char *base, *newbase;
1354 char *resolvedname;
1355 buf [binl] = 0;
1356 resolvedname = mono_path_resolve_symlinks (buf);
1357
1358 base = g_path_get_dirname (resolvedname);
1359 newbase = g_path_get_dirname(base);
1360 mdirname = g_strdup_printf ("%s/Libraries", newbase);
1361
1362 g_free (resolvedname);
1363 g_free (base);
1364 g_free (newbase);
1365 }
1366 break;
1367 }
1368 #endif
1369 }
1370
1371 if (!mdirname)
1372 continue;
1373
1374 while ((full_name = mono_dl_build_path (mdirname, file_name, &iter))) {
1375 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1376 if (!module) {
1377 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1378 "DllImport error loading library '%s': '%s'.",
1379 full_name, error_msg);
1380 g_free (error_msg);
1381 } else {
1382 found_name = g_strdup (full_name);
1383 }
1384 g_free (full_name);
1385 if (module)
1386 break;
1387
1388 }
1389 g_free (mdirname);
1390 if (module)
1391 break;
1392 }
1393
1394 }
1395
1396 if (!module) {
1397 void *iter = NULL;
1398 char *file_or_base = is_absolute ? base_name : file_name;
1399 while ((full_name = mono_dl_build_path (dir_name, file_or_base, &iter))) {
1400 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1401 if (!module) {
1402 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1403 "DllImport error loading library '%s': '%s'.",
1404 full_name, error_msg);
1405 g_free (error_msg);
1406 } else {
1407 found_name = g_strdup (full_name);
1408 }
1409 g_free (full_name);
1410 if (module)
1411 break;
1412 }
1413 }
1414
1415 if (!module) {
1416 module = cached_module_load (file_name, MONO_DL_LAZY, &error_msg);
1417 if (!module) {
1418 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1419 "DllImport error loading library '%s': '%s'.",
1420 file_name, error_msg);
1421 } else {
1422 found_name = g_strdup (file_name);
1423 }
1424 }
1425
1426 g_free (file_name);
1427 if (is_absolute) {
1428 g_free (base_name);
1429 g_free (dir_name);
1430 }
1431
1432 if (module)
1433 break;
1434 }
1435
1436 if (!module) {
1437 mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_DLLIMPORT,
1438 "DllImport unable to load library '%s'.",
1439 error_msg);
1440 g_free (error_msg);
1441
1442 if (exc_class) {
1443 *exc_class = "DllNotFoundException";
1444 *exc_arg = new_scope;
1445 }
1446 return NULL;
1447 }
1448
1449 if (!cached) {
1450 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1451 "DllImport loaded library '%s'.", found_name);
1452 mono_image_lock (image);
1453 if (!g_hash_table_lookup (image->pinvoke_scopes, new_scope)) {
1454 g_hash_table_insert (image->pinvoke_scopes, g_strdup (new_scope), module);
1455 g_hash_table_insert (image->pinvoke_scope_filenames, g_strdup (new_scope), g_strdup (found_name));
1456 }
1457 mono_image_unlock (image);
1458 }
1459
1460 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1461 "DllImport searching in: '%s' ('%s').", new_scope, found_name);
1462 g_free (found_name);
1463
1464 #ifdef TARGET_WIN32
1465 if (import && import [0] == '#' && isdigit (import [1])) {
1466 char *end;
1467 long id;
1468
1469 id = strtol (import + 1, &end, 10);
1470 if (id > 0 && *end == '\0')
1471 import++;
1472 }
1473 #endif
1474 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1475 "Searching for '%s'.", import);
1476
1477 if (piinfo->piflags & PINVOKE_ATTRIBUTE_NO_MANGLE) {
1478 error_msg = mono_dl_symbol (module, import, &addr);
1479 } else {
1480 char *mangled_name = NULL, *mangled_name2 = NULL;
1481 int mangle_charset;
1482 int mangle_stdcall;
1483 int mangle_param_count;
1484 #ifdef TARGET_WIN32
1485 int param_count;
1486 #endif
1487
1488 /*
1489 * Search using a variety of mangled names
1490 */
1491 for (mangle_charset = 0; mangle_charset <= 1; mangle_charset ++) {
1492 for (mangle_stdcall = 0; mangle_stdcall <= 1; mangle_stdcall ++) {
1493 gboolean need_param_count = FALSE;
1494 #ifdef TARGET_WIN32
1495 if (mangle_stdcall > 0)
1496 need_param_count = TRUE;
1497 #endif
1498 for (mangle_param_count = 0; mangle_param_count <= (need_param_count ? 256 : 0); mangle_param_count += 4) {
1499
1500 if (addr)
1501 continue;
1502
1503 mangled_name = (char*)import;
1504 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CHAR_SET_MASK) {
1505 case PINVOKE_ATTRIBUTE_CHAR_SET_UNICODE:
1506 /* Try the mangled name first */
1507 if (mangle_charset == 0)
1508 mangled_name = g_strconcat (import, "W", NULL);
1509 break;
1510 case PINVOKE_ATTRIBUTE_CHAR_SET_AUTO:
1511 #ifdef TARGET_WIN32
1512 if (mangle_charset == 0)
1513 mangled_name = g_strconcat (import, "W", NULL);
1514 #else
1515 /* Try the mangled name last */
1516 if (mangle_charset == 1)
1517 mangled_name = g_strconcat (import, "A", NULL);
1518 #endif
1519 break;
1520 case PINVOKE_ATTRIBUTE_CHAR_SET_ANSI:
1521 default:
1522 /* Try the mangled name last */
1523 if (mangle_charset == 1)
1524 mangled_name = g_strconcat (import, "A", NULL);
1525 break;
1526 }
1527
1528 #ifdef TARGET_WIN32
1529 if (mangle_param_count == 0)
1530 param_count = mono_method_signature (method)->param_count * sizeof (gpointer);
1531 else
1532 /* Try brute force, since it would be very hard to compute the stack usage correctly */
1533 param_count = mangle_param_count;
1534
1535 /* Try the stdcall mangled name */
1536 /*
1537 * gcc under windows creates mangled names without the underscore, but MS.NET
1538 * doesn't support it, so we doesn't support it either.
1539 */
1540 if (mangle_stdcall == 1)
1541 mangled_name2 = g_strdup_printf ("_%s@%d", mangled_name, param_count);
1542 else
1543 mangled_name2 = mangled_name;
1544 #else
1545 mangled_name2 = mangled_name;
1546 #endif
1547
1548 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1549 "Probing '%s'.", mangled_name2);
1550
1551 error_msg = mono_dl_symbol (module, mangled_name2, &addr);
1552
1553 if (addr)
1554 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1555 "Found as '%s'.", mangled_name2);
1556 else
1557 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1558 "Could not find '%s' due to '%s'.", mangled_name2, error_msg);
1559
1560 g_free (error_msg);
1561 error_msg = NULL;
1562
1563 if (mangled_name != mangled_name2)
1564 g_free (mangled_name2);
1565 if (mangled_name != import)
1566 g_free (mangled_name);
1567 }
1568 }
1569 }
1570 }
1571
1572 if (!addr) {
1573 g_free (error_msg);
1574 if (exc_class) {
1575 *exc_class = "EntryPointNotFoundException";
1576 *exc_arg = import;
1577 }
1578 return NULL;
1579 }
1580 piinfo->addr = addr;
1581 return addr;
1582 }
1583
1584 /*
1585 * LOCKING: assumes the loader lock to be taken.
1586 */
1587 static MonoMethod *
1588 mono_get_method_from_token (MonoImage *image, guint32 token, MonoClass *klass,
1589 MonoGenericContext *context, gboolean *used_context, MonoError *error)
1590 {
1591 MonoMethod *result;
1592 int table = mono_metadata_token_table (token);
1593 int idx = mono_metadata_token_index (token);
1594 MonoTableInfo *tables = image->tables;
1595 MonoGenericContainer *generic_container = NULL, *container = NULL;
1596 const char *sig = NULL;
1597 guint32 cols [MONO_TYPEDEF_SIZE];
1598
1599 error_init (error);
1600
1601 if (image_is_dynamic (image)) {
1602 MonoClass *handle_class;
1603
1604 result = (MonoMethod *)mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context, error);
1605 mono_error_assert_ok (error);
1606
1607 // This checks the memberref type as well
1608 if (result && handle_class != mono_defaults.methodhandle_class) {
1609 mono_error_set_bad_image (error, image, "Bad method token 0x%08x on dynamic image", token);
1610 return NULL;
1611 }
1612 return result;
1613 }
1614
1615 if (table != MONO_TABLE_METHOD) {
1616 if (table == MONO_TABLE_METHODSPEC) {
1617 if (used_context) *used_context = TRUE;
1618 return method_from_methodspec (image, context, idx, error);
1619 }
1620 if (table != MONO_TABLE_MEMBERREF) {
1621 mono_error_set_bad_image (error, image, "Bad method token 0x%08x.", token);
1622 return NULL;
1623 }
1624 return method_from_memberref (image, idx, context, used_context, error);
1625 }
1626
1627 if (used_context) *used_context = FALSE;
1628
1629 if (idx > image->tables [MONO_TABLE_METHOD].rows) {
1630 mono_error_set_bad_image (error, image, "Bad method token 0x%08x (out of bounds).", token);
1631 return NULL;
1632 }
1633
1634 if (!klass) {
1635 guint32 type = mono_metadata_typedef_from_method (image, token);
1636 if (!type) {
1637 mono_error_set_bad_image (error, image, "Bad method token 0x%08x (could not find corresponding typedef).", token);
1638 return NULL;
1639 }
1640 klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | type, error);
1641 if (klass == NULL)
1642 return NULL;
1643 }
1644
1645 mono_metadata_decode_row (&image->tables [MONO_TABLE_METHOD], idx - 1, cols, 6);
1646
1647 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1648 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
1649 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethodPInvoke));
1650 } else {
1651 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethod));
1652 methods_size += sizeof (MonoMethod);
1653 }
1654
1655 mono_stats.method_count ++;
1656
1657 result->slot = -1;
1658 result->klass = klass;
1659 result->flags = cols [2];
1660 result->iflags = cols [1];
1661 result->token = token;
1662 result->name = mono_metadata_string_heap (image, cols [3]);
1663
1664 if (!sig) /* already taken from the methodref */
1665 sig = mono_metadata_blob_heap (image, cols [4]);
1666 /* size = */ mono_metadata_decode_blob_size (sig, &sig);
1667
1668 container = mono_class_try_get_generic_container (klass);
1669
1670 /*
1671 * load_generic_params does a binary search so only call it if the method
1672 * is generic.
1673 */
1674 if (*sig & 0x10) {
1675 generic_container = mono_metadata_load_generic_params (image, token, container);
1676 }
1677 if (generic_container) {
1678 result->is_generic = TRUE;
1679 generic_container->owner.method = result;
1680 generic_container->is_anonymous = FALSE; // Method is now known, container is no longer anonymous
1681 /*FIXME put this before the image alloc*/
1682 if (!mono_metadata_load_generic_param_constraints_checked (image, token, generic_container, error))
1683 return NULL;
1684
1685 container = generic_container;
1686 }
1687
1688 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
1689 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
1690 result->string_ctor = 1;
1691 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
1692 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)result;
1693
1694 #ifdef TARGET_WIN32
1695 /* IJW is P/Invoke with a predefined function pointer. */
1696 if (image->is_module_handle && (cols [1] & METHOD_IMPL_ATTRIBUTE_NATIVE)) {
1697 piinfo->addr = mono_image_rva_map (image, cols [0]);
1698 g_assert (piinfo->addr);
1699 }
1700 #endif
1701 piinfo->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
1702 /* Native methods can have no map. */
1703 if (piinfo->implmap_idx)
1704 piinfo->piflags = mono_metadata_decode_row_col (&tables [MONO_TABLE_IMPLMAP], piinfo->implmap_idx - 1, MONO_IMPLMAP_FLAGS);
1705 }
1706
1707 if (generic_container)
1708 mono_method_set_generic_container (result, generic_container);
1709
1710 return result;
1711 }
1712
1713 MonoMethod *
1714 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
1715 {
1716 MonoError error;
1717 MonoMethod *result = mono_get_method_checked (image, token, klass, NULL, &error);
1718 mono_error_cleanup (&error);
1719 return result;
1720 }
1721
1722 MonoMethod *
1723 mono_get_method_full (MonoImage *image, guint32 token, MonoClass *klass,
1724 MonoGenericContext *context)
1725 {
1726 MonoError error;
1727 MonoMethod *result = mono_get_method_checked (image, token, klass, context, &error);
1728 mono_error_cleanup (&error);
1729 return result;
1730 }
1731
1732 MonoMethod *
1733 mono_get_method_checked (MonoImage *image, guint32 token, MonoClass *klass, MonoGenericContext *context, MonoError *error)
1734 {
1735 MonoMethod *result = NULL;
1736 gboolean used_context = FALSE;
1737
1738 /* We do everything inside the lock to prevent creation races */
1739
1740 error_init (error);
1741
1742 mono_image_lock (image);
1743
1744 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD) {
1745 if (!image->method_cache)
1746 image->method_cache = g_hash_table_new (NULL, NULL);
1747 result = (MonoMethod *)g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
1748 } else if (!image_is_dynamic (image)) {
1749 if (!image->methodref_cache)
1750 image->methodref_cache = g_hash_table_new (NULL, NULL);
1751 result = (MonoMethod *)g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
1752 }
1753 mono_image_unlock (image);
1754
1755 if (result)
1756 return result;
1757
1758
1759 result = mono_get_method_from_token (image, token, klass, context, &used_context, error);
1760 if (!result)
1761 return NULL;
1762
1763 mono_image_lock (image);
1764 if (!used_context && !result->is_inflated) {
1765 MonoMethod *result2 = NULL;
1766
1767 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
1768 result2 = (MonoMethod *)g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
1769 else if (!image_is_dynamic (image))
1770 result2 = (MonoMethod *)g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
1771
1772 if (result2) {
1773 mono_image_unlock (image);
1774 return result2;
1775 }
1776
1777 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
1778 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)), result);
1779 else if (!image_is_dynamic (image))
1780 g_hash_table_insert (image->methodref_cache, GINT_TO_POINTER (token), result);
1781 }
1782
1783 mono_image_unlock (image);
1784
1785 return result;
1786 }
1787
1788 static MonoMethod *
1789 get_method_constrained (MonoImage *image, MonoMethod *method, MonoClass *constrained_class, MonoGenericContext *context, MonoError *error)
1790 {
1791 MonoMethod *result;
1792 MonoClass *ic = NULL;
1793 MonoGenericContext *method_context = NULL;
1794 MonoMethodSignature *sig, *original_sig;
1795
1796 error_init (error);
1797
1798 mono_class_init (constrained_class);
1799 original_sig = sig = mono_method_signature_checked (method, error);
1800 if (sig == NULL) {
1801 return NULL;
1802 }
1803
1804 if (method->is_inflated && sig->generic_param_count) {
1805 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
1806 sig = mono_method_signature_checked (imethod->declaring, error); /*We assume that if the inflated method signature is valid, the declaring method is too*/
1807 if (!sig)
1808 return NULL;
1809 method_context = mono_method_get_context (method);
1810
1811 original_sig = sig;
1812 /*
1813 * We must inflate the signature with the class instantiation to work on
1814 * cases where a class inherit from a generic type and the override replaces
1815 * any type argument which a concrete type. See #325283.
1816 */
1817 if (method_context->class_inst) {
1818 MonoGenericContext ctx;
1819 ctx.method_inst = NULL;
1820 ctx.class_inst = method_context->class_inst;
1821 /*Fixme, property propagate this error*/
1822 sig = inflate_generic_signature_checked (method->klass->image, sig, &ctx, error);
1823 if (!sig)
1824 return NULL;
1825 }
1826 }
1827
1828 if ((constrained_class != method->klass) && (MONO_CLASS_IS_INTERFACE (method->klass)))
1829 ic = method->klass;
1830
1831 result = find_method (constrained_class, ic, method->name, sig, constrained_class, error);
1832 if (sig != original_sig)
1833 mono_metadata_free_inflated_signature (sig);
1834
1835 if (!result)
1836 return NULL;
1837
1838 if (method_context) {
1839 result = mono_class_inflate_generic_method_checked (result, method_context, error);
1840 if (!result)
1841 return NULL;
1842 }
1843
1844 return result;
1845 }
1846
1847 MonoMethod *
1848 mono_get_method_constrained_with_method (MonoImage *image, MonoMethod *method, MonoClass *constrained_class,
1849 MonoGenericContext *context, MonoError *error)
1850 {
1851 g_assert (method);
1852
1853 return get_method_constrained (image, method, constrained_class, context, error);
1854 }
1855
1856 /**
1857 * mono_get_method_constrained:
1858 *
1859 * This is used when JITing the `constrained.' opcode.
1860 *
1861 * This returns two values: the contrained method, which has been inflated
1862 * as the function return value; And the original CIL-stream method as
1863 * declared in cil_method. The later is used for verification.
1864 */
1865 MonoMethod *
1866 mono_get_method_constrained (MonoImage *image, guint32 token, MonoClass *constrained_class,
1867 MonoGenericContext *context, MonoMethod **cil_method)
1868 {
1869 MonoError error;
1870 MonoMethod *result = mono_get_method_constrained_checked (image, token, constrained_class, context, cil_method, &error);
1871 mono_error_cleanup (&error);
1872 return result;
1873 }
1874
1875 MonoMethod *
1876 mono_get_method_constrained_checked (MonoImage *image, guint32 token, MonoClass *constrained_class, MonoGenericContext *context, MonoMethod **cil_method, MonoError *error)
1877 {
1878 error_init (error);
1879
1880 *cil_method = mono_get_method_from_token (image, token, NULL, context, NULL, error);
1881 if (!*cil_method)
1882 return NULL;
1883
1884 return get_method_constrained (image, *cil_method, constrained_class, context, error);
1885 }
1886
1887 void
1888 mono_free_method (MonoMethod *method)
1889 {
1890 if (mono_profiler_get_events () & MONO_PROFILE_METHOD_EVENTS)
1891 mono_profiler_method_free (method);
1892
1893 /* FIXME: This hack will go away when the profiler will support freeing methods */
1894 if (mono_profiler_get_events () != MONO_PROFILE_NONE)
1895 return;
1896
1897 if (method->signature) {
1898 /*
1899 * FIXME: This causes crashes because the types inside signatures and
1900 * locals are shared.
1901 */
1902 /* mono_metadata_free_method_signature (method->signature); */
1903 /* g_free (method->signature); */
1904 }
1905
1906 if (method_is_dynamic (method)) {
1907 MonoMethodWrapper *mw = (MonoMethodWrapper*)method;
1908 int i;
1909
1910 mono_marshal_free_dynamic_wrappers (method);
1911
1912 mono_image_property_remove (method->klass->image, method);
1913
1914 g_free ((char*)method->name);
1915 if (mw->header) {
1916 g_free ((char*)mw->header->code);
1917 for (i = 0; i < mw->header->num_locals; ++i)
1918 g_free (mw->header->locals [i]);
1919 g_free (mw->header->clauses);
1920 g_free (mw->header);
1921 }
1922 g_free (mw->method_data);
1923 g_free (method->signature);
1924 g_free (method);
1925 }
1926 }
1927
1928 void
1929 mono_method_get_param_names (MonoMethod *method, const char **names)
1930 {
1931 int i, lastp;
1932 MonoClass *klass;
1933 MonoTableInfo *methodt;
1934 MonoTableInfo *paramt;
1935 MonoMethodSignature *signature;
1936 guint32 idx;
1937
1938 if (method->is_inflated)
1939 method = ((MonoMethodInflated *) method)->declaring;
1940
1941 signature = mono_method_signature (method);
1942 /*FIXME this check is somewhat redundant since the caller usally will have to get the signature to figure out the
1943 number of arguments and allocate a properly sized array. */
1944 if (signature == NULL)
1945 return;
1946
1947 if (!signature->param_count)
1948 return;
1949
1950 for (i = 0; i < signature->param_count; ++i)
1951 names [i] = "";
1952
1953 klass = method->klass;
1954 if (klass->rank)
1955 return;
1956
1957 mono_class_init (klass);
1958
1959 if (image_is_dynamic (klass->image)) {
1960 MonoReflectionMethodAux *method_aux =
1961 (MonoReflectionMethodAux *)g_hash_table_lookup (
1962 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1963 if (method_aux && method_aux->param_names) {
1964 for (i = 0; i < mono_method_signature (method)->param_count; ++i)
1965 if (method_aux->param_names [i + 1])
1966 names [i] = method_aux->param_names [i + 1];
1967 }
1968 return;
1969 }
1970
1971 if (method->wrapper_type) {
1972 char **pnames = NULL;
1973
1974 mono_image_lock (klass->image);
1975 if (klass->image->wrapper_param_names)
1976 pnames = (char **)g_hash_table_lookup (klass->image->wrapper_param_names, method);
1977 mono_image_unlock (klass->image);
1978
1979 if (pnames) {
1980 for (i = 0; i < signature->param_count; ++i)
1981 names [i] = pnames [i];
1982 }
1983 return;
1984 }
1985
1986 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1987 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1988 idx = mono_method_get_index (method);
1989 if (idx > 0) {
1990 guint32 cols [MONO_PARAM_SIZE];
1991 guint param_index;
1992
1993 param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1994
1995 if (idx < methodt->rows)
1996 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1997 else
1998 lastp = paramt->rows + 1;
1999 for (i = param_index; i < lastp; ++i) {
2000 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
2001 if (cols [MONO_PARAM_SEQUENCE] && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) /* skip return param spec and bounds check*/
2002 names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass->image, cols [MONO_PARAM_NAME]);
2003 }
2004 }
2005 }
2006
2007 guint32
2008 mono_method_get_param_token (MonoMethod *method, int index)
2009 {
2010 MonoClass *klass = method->klass;
2011 MonoTableInfo *methodt;
2012 guint32 idx;
2013
2014 mono_class_init (klass);
2015
2016 if (image_is_dynamic (klass->image))
2017 g_assert_not_reached ();
2018
2019 methodt = &klass->image->tables [MONO_TABLE_METHOD];
2020 idx = mono_method_get_index (method);
2021 if (idx > 0) {
2022 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2023
2024 if (index == -1)
2025 /* Return value */
2026 return mono_metadata_make_token (MONO_TABLE_PARAM, 0);
2027 else
2028 return mono_metadata_make_token (MONO_TABLE_PARAM, param_index + index);
2029 }
2030
2031 return 0;
2032 }
2033
2034 void
2035 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
2036 {
2037 int i, lastp;
2038 MonoClass *klass = method->klass;
2039 MonoTableInfo *methodt;
2040 MonoTableInfo *paramt;
2041 MonoMethodSignature *signature;
2042 guint32 idx;
2043
2044 signature = mono_method_signature (method);
2045 g_assert (signature); /*FIXME there is no way to signal error from this function*/
2046
2047 for (i = 0; i < signature->param_count + 1; ++i)
2048 mspecs [i] = NULL;
2049
2050 if (image_is_dynamic (method->klass->image)) {
2051 MonoReflectionMethodAux *method_aux =
2052 (MonoReflectionMethodAux *)g_hash_table_lookup (
2053 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
2054 if (method_aux && method_aux->param_marshall) {
2055 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
2056 for (i = 0; i < signature->param_count + 1; ++i)
2057 if (dyn_specs [i]) {
2058 mspecs [i] = g_new0 (MonoMarshalSpec, 1);
2059 memcpy (mspecs [i], dyn_specs [i], sizeof (MonoMarshalSpec));
2060 mspecs [i]->data.custom_data.custom_name = g_strdup (dyn_specs [i]->data.custom_data.custom_name);
2061 mspecs [i]->data.custom_data.cookie = g_strdup (dyn_specs [i]->data.custom_data.cookie);
2062 }
2063 }
2064 return;
2065 }
2066
2067 mono_class_init (klass);
2068
2069 methodt = &klass->image->tables [MONO_TABLE_METHOD];
2070 paramt = &klass->image->tables [MONO_TABLE_PARAM];
2071 idx = mono_method_get_index (method);
2072 if (idx > 0) {
2073 guint32 cols [MONO_PARAM_SIZE];
2074 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2075
2076 if (idx < methodt->rows)
2077 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
2078 else
2079 lastp = paramt->rows + 1;
2080
2081 for (i = param_index; i < lastp; ++i) {
2082 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
2083
2084 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) {
2085 const char *tp;
2086 tp = mono_metadata_get_marshal_info (klass->image, i - 1, FALSE);
2087 g_assert (tp);
2088 mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass->image, tp);
2089 }
2090 }
2091
2092 return;
2093 }
2094 }
2095
2096 gboolean
2097 mono_method_has_marshal_info (MonoMethod *method)
2098 {
2099 int i, lastp;
2100 MonoClass *klass = method->klass;
2101 MonoTableInfo *methodt;
2102 MonoTableInfo *paramt;
2103 guint32 idx;
2104
2105 if (image_is_dynamic (method->klass->image)) {
2106 MonoReflectionMethodAux *method_aux =
2107 (MonoReflectionMethodAux *)g_hash_table_lookup (
2108 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
2109 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
2110 if (dyn_specs) {
2111 for (i = 0; i < mono_method_signature (method)->param_count + 1; ++i)
2112 if (dyn_specs [i])
2113 return TRUE;
2114 }
2115 return FALSE;
2116 }
2117
2118 mono_class_init (klass);
2119
2120 methodt = &klass->image->tables [MONO_TABLE_METHOD];
2121 paramt = &klass->image->tables [MONO_TABLE_PARAM];
2122 idx = mono_method_get_index (method);
2123 if (idx > 0) {
2124 guint32 cols [MONO_PARAM_SIZE];
2125 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2126
2127 if (idx + 1 < methodt->rows)
2128 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
2129 else
2130 lastp = paramt->rows + 1;
2131
2132 for (i = param_index; i < lastp; ++i) {
2133 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
2134
2135 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL)
2136 return TRUE;
2137 }
2138 return FALSE;
2139 }
2140 return FALSE;
2141 }
2142
2143 gpointer
2144 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
2145 {
2146 void **data;
2147 g_assert (method != NULL);
2148 g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
2149
2150 data = (void **)((MonoMethodWrapper *)method)->method_data;
2151 g_assert (data != NULL);
2152 g_assert (id <= GPOINTER_TO_UINT (*data));
2153 return data [id];
2154 }
2155
2156 typedef struct {
2157 MonoStackWalk func;
2158 gpointer user_data;
2159 } StackWalkUserData;
2160
2161 static gboolean
2162 stack_walk_adapter (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
2163 {
2164 StackWalkUserData *d = (StackWalkUserData *)data;
2165
2166 switch (frame->type) {
2167 case FRAME_TYPE_DEBUGGER_INVOKE:
2168 case FRAME_TYPE_MANAGED_TO_NATIVE:
2169 case FRAME_TYPE_TRAMPOLINE:
2170 return FALSE;
2171 case FRAME_TYPE_MANAGED:
2172 g_assert (frame->ji);
2173 return d->func (frame->actual_method, frame->native_offset, frame->il_offset, frame->managed, d->user_data);
2174 break;
2175 default:
2176 g_assert_not_reached ();
2177 return FALSE;
2178 }
2179 }
2180
2181 void
2182 mono_stack_walk (MonoStackWalk func, gpointer user_data)
2183 {
2184 StackWalkUserData ud = { func, user_data };
2185 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (stack_walk_adapter, NULL, MONO_UNWIND_LOOKUP_ALL, &ud);
2186 }
2187
2188 void
2189 mono_stack_walk_no_il (MonoStackWalk func, gpointer user_data)
2190 {
2191 StackWalkUserData ud = { func, user_data };
2192 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (stack_walk_adapter, NULL, MONO_UNWIND_DEFAULT, &ud);
2193 }
2194
2195 typedef struct {
2196 MonoStackWalkAsyncSafe func;
2197 gpointer user_data;
2198 } AsyncStackWalkUserData;
2199
2200
2201 static gboolean
2202 async_stack_walk_adapter (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
2203 {
2204 AsyncStackWalkUserData *d = (AsyncStackWalkUserData *)data;
2205
2206 switch (frame->type) {
2207 case FRAME_TYPE_DEBUGGER_INVOKE:
2208 case FRAME_TYPE_MANAGED_TO_NATIVE:
2209 case FRAME_TYPE_TRAMPOLINE:
2210 return FALSE;
2211 case FRAME_TYPE_MANAGED:
2212 if (!frame->ji)
2213 return FALSE;
2214 if (frame->ji->async) {
2215 return d->func (NULL, frame->domain, frame->ji->code_start, frame->native_offset, d->user_data);
2216 } else {
2217 return d->func (frame->actual_method, frame->domain, frame->ji->code_start, frame->native_offset, d->user_data);
2218 }
2219 break;
2220 default:
2221 g_assert_not_reached ();
2222 return FALSE;
2223 }
2224 }
2225
2226
2227 /*
2228 * mono_stack_walk_async_safe:
2229 *
2230 * Async safe version callable from signal handlers.
2231 */
2232 void
2233 mono_stack_walk_async_safe (MonoStackWalkAsyncSafe func, void *initial_sig_context, void *user_data)
2234 {
2235 MonoContext ctx;
2236 AsyncStackWalkUserData ud = { func, user_data };
2237
2238 mono_sigctx_to_monoctx (initial_sig_context, &ctx);
2239 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (async_stack_walk_adapter, &ctx, MONO_UNWIND_SIGNAL_SAFE, &ud);
2240 }
2241
2242 static gboolean
2243 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2244 {
2245 MonoMethod **dest = (MonoMethod **)data;
2246 *dest = m;
2247 /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
2248
2249 return managed;
2250 }
2251
2252 MonoMethod*
2253 mono_method_get_last_managed (void)
2254 {
2255 MonoMethod *m = NULL;
2256 mono_stack_walk_no_il (last_managed, &m);
2257 return m;
2258 }
2259
2260 static gboolean loader_lock_track_ownership = FALSE;
2261
2262 /**
2263 * mono_loader_lock:
2264 *
2265 * See docs/thread-safety.txt for the locking strategy.
2266 */
2267 void
2268 mono_loader_lock (void)
2269 {
2270 mono_locks_coop_acquire (&loader_mutex, LoaderLock);
2271 if (G_UNLIKELY (loader_lock_track_ownership)) {
2272 mono_native_tls_set_value (loader_lock_nest_id, GUINT_TO_POINTER (GPOINTER_TO_UINT (mono_native_tls_get_value (loader_lock_nest_id)) + 1));
2273 }
2274 }
2275
2276 void
2277 mono_loader_unlock (void)
2278 {
2279 mono_locks_coop_release (&loader_mutex, LoaderLock);
2280 if (G_UNLIKELY (loader_lock_track_ownership)) {
2281 mono_native_tls_set_value (loader_lock_nest_id, GUINT_TO_POINTER (GPOINTER_TO_UINT (mono_native_tls_get_value (loader_lock_nest_id)) - 1));
2282 }
2283 }
2284
2285 /*
2286 * mono_loader_lock_track_ownership:
2287 *
2288 * Set whenever the runtime should track ownership of the loader lock. If set to TRUE,
2289 * the mono_loader_lock_is_owned_by_self () can be called to query whenever the current
2290 * thread owns the loader lock.
2291 */
2292 void
2293 mono_loader_lock_track_ownership (gboolean track)
2294 {
2295 loader_lock_track_ownership = track;
2296 }
2297
2298 /*
2299 * mono_loader_lock_is_owned_by_self:
2300 *
2301 * Return whenever the current thread owns the loader lock.
2302 * This is useful to avoid blocking operations while holding the loader lock.
2303 */
2304 gboolean
2305 mono_loader_lock_is_owned_by_self (void)
2306 {
2307 g_assert (loader_lock_track_ownership);
2308
2309 return GPOINTER_TO_UINT (mono_native_tls_get_value (loader_lock_nest_id)) > 0;
2310 }
2311
2312 /*
2313 * mono_loader_lock_if_inited:
2314 *
2315 * Acquire the loader lock if it has been initialized, no-op otherwise. This can
2316 * be used in runtime initialization code which can be executed before mono_loader_init ().
2317 */
2318 void
2319 mono_loader_lock_if_inited (void)
2320 {
2321 if (loader_lock_inited)
2322 mono_loader_lock ();
2323 }
2324
2325 void
2326 mono_loader_unlock_if_inited (void)
2327 {
2328 if (loader_lock_inited)
2329 mono_loader_unlock ();
2330 }
2331
2332 /**
2333 * mono_method_signature:
2334 *
2335 * Return the signature of the method M. On failure, returns NULL, and ERR is set.
2336 */
2337 MonoMethodSignature*
2338 mono_method_signature_checked (MonoMethod *m, MonoError *error)
2339 {
2340 int idx;
2341 MonoImage* img;
2342 const char *sig;
2343 gboolean can_cache_signature;
2344 MonoGenericContainer *container;
2345 MonoMethodSignature *signature = NULL, *sig2;
2346 guint32 sig_offset;
2347
2348 /* We need memory barriers below because of the double-checked locking pattern */
2349
2350 error_init (error);
2351
2352 if (m->signature)
2353 return m->signature;
2354
2355 img = m->klass->image;
2356
2357 if (m->is_inflated) {
2358 MonoMethodInflated *imethod = (MonoMethodInflated *) m;
2359 /* the lock is recursive */
2360 signature = mono_method_signature (imethod->declaring);
2361 signature = inflate_generic_signature_checked (imethod->declaring->klass->image, signature, mono_method_get_context (m), error);
2362 if (!mono_error_ok (error))
2363 return NULL;
2364
2365 inflated_signatures_size += mono_metadata_signature_size (signature);
2366
2367 mono_image_lock (img);
2368
2369 mono_memory_barrier ();
2370 if (!m->signature)
2371 m->signature = signature;
2372
2373 mono_image_unlock (img);
2374
2375 return m->signature;
2376 }
2377
2378 g_assert (mono_metadata_token_table (m->token) == MONO_TABLE_METHOD);
2379 idx = mono_metadata_token_index (m->token);
2380
2381 sig = mono_metadata_blob_heap (img, sig_offset = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_SIGNATURE));
2382
2383 g_assert (!mono_class_is_ginst (m->klass));
2384 container = mono_method_get_generic_container (m);
2385 if (!container)
2386 container = mono_class_try_get_generic_container (m->klass);
2387
2388 /* Generic signatures depend on the container so they cannot be cached */
2389 /* icall/pinvoke signatures cannot be cached cause we modify them below */
2390 can_cache_signature = !(m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) && !(m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) && !container;
2391
2392 /* If the method has parameter attributes, that can modify the signature */
2393 if (mono_metadata_method_has_param_attrs (img, idx))
2394 can_cache_signature = FALSE;
2395
2396 if (can_cache_signature) {
2397 mono_image_lock (img);
2398 signature = (MonoMethodSignature *)g_hash_table_lookup (img->method_signatures, sig);
2399 mono_image_unlock (img);
2400 }
2401
2402 if (!signature) {
2403 const char *sig_body;
2404 /*TODO we should cache the failure result somewhere*/
2405 if (!mono_verifier_verify_method_signature (img, sig_offset, error))
2406 return NULL;
2407
2408 /* size = */ mono_metadata_decode_blob_size (sig, &sig_body);
2409
2410 signature = mono_metadata_parse_method_signature_full (img, container, idx, sig_body, NULL, error);
2411 if (!signature)
2412 return NULL;
2413
2414 if (can_cache_signature) {
2415 mono_image_lock (img);
2416 sig2 = (MonoMethodSignature *)g_hash_table_lookup (img->method_signatures, sig);
2417 if (!sig2)
2418 g_hash_table_insert (img->method_signatures, (gpointer)sig, signature);
2419 mono_image_unlock (img);
2420 }
2421
2422 signatures_size += mono_metadata_signature_size (signature);
2423 }
2424
2425 /* Verify metadata consistency */
2426 if (signature->generic_param_count) {
2427 if (!container || !container->is_method) {
2428 mono_error_set_method_load (error, m->klass, m->name, "Signature claims method has generic parameters, but generic_params table says it doesn't for method 0x%08x from image %s", idx, img->name);
2429 return NULL;
2430 }
2431 if (container->type_argc != signature->generic_param_count) {
2432 mono_error_set_method_load (error, m->klass, m->name, "Inconsistent generic parameter count. Signature says %d, generic_params table says %d for method 0x%08x from image %s", signature->generic_param_count, container->type_argc, idx, img->name);
2433 return NULL;
2434 }
2435 } else if (container && container->is_method && container->type_argc) {
2436 mono_error_set_method_load (error, m->klass, m->name, "generic_params table claims method has generic parameters, but signature says it doesn't for method 0x%08x from image %s", idx, img->name);
2437 return NULL;
2438 }
2439 if (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
2440 signature->pinvoke = 1;
2441 #ifdef TARGET_WIN32
2442 /*
2443 * On Windows the default pinvoke calling convention is STDCALL but
2444 * we need CDECL since this is actually an icall.
2445 */
2446 signature->call_convention = MONO_CALL_C;
2447 #endif
2448 } else if (m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
2449 MonoCallConvention conv = (MonoCallConvention)0;
2450 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)m;
2451 signature->pinvoke = 1;
2452
2453 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CALL_CONV_MASK) {
2454 case 0: /* no call conv, so using default */
2455 case PINVOKE_ATTRIBUTE_CALL_CONV_WINAPI:
2456 conv = MONO_CALL_DEFAULT;
2457 break;
2458 case PINVOKE_ATTRIBUTE_CALL_CONV_CDECL:
2459 conv = MONO_CALL_C;
2460 break;
2461 case PINVOKE_ATTRIBUTE_CALL_CONV_STDCALL:
2462 conv = MONO_CALL_STDCALL;
2463 break;
2464 case PINVOKE_ATTRIBUTE_CALL_CONV_THISCALL:
2465 conv = MONO_CALL_THISCALL;
2466 break;
2467 case PINVOKE_ATTRIBUTE_CALL_CONV_FASTCALL:
2468 conv = MONO_CALL_FASTCALL;
2469 break;
2470 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERIC:
2471 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERICINST:
2472 default:
2473 mono_error_set_method_load (error, m->klass, m->name, "unsupported calling convention : 0x%04x for method 0x%08x from image %s", piinfo->piflags, idx, img->name);
2474 return NULL;
2475 }
2476 signature->call_convention = conv;
2477 }
2478
2479 mono_image_lock (img);
2480
2481 mono_memory_barrier ();
2482 if (!m->signature)
2483 m->signature = signature;
2484
2485 mono_image_unlock (img);
2486
2487 return m->signature;
2488 }
2489
2490 /**
2491 * mono_method_signature:
2492 *
2493 * Return the signature of the method M. On failure, returns NULL.
2494 */
2495 MonoMethodSignature*
2496 mono_method_signature (MonoMethod *m)
2497 {
2498 MonoError error;
2499 MonoMethodSignature *sig;
2500
2501 sig = mono_method_signature_checked (m, &error);
2502 if (!sig) {
2503 char *type_name = mono_type_get_full_name (m->klass);
2504 g_warning ("Could not load signature of %s:%s due to: %s", type_name, m->name, mono_error_get_message (&error));
2505 g_free (type_name);
2506 mono_error_cleanup (&error);
2507 }
2508
2509 return sig;
2510 }
2511
2512 const char*
2513 mono_method_get_name (MonoMethod *method)
2514 {
2515 return method->name;
2516 }
2517
2518 MonoClass*
2519 mono_method_get_class (MonoMethod *method)
2520 {
2521 return method->klass;
2522 }
2523
2524 guint32
2525 mono_method_get_token (MonoMethod *method)
2526 {
2527 return method->token;
2528 }
2529
2530 MonoMethodHeader*
2531 mono_method_get_header_checked (MonoMethod *method, MonoError *error)
2532 {
2533 int idx;
2534 guint32 rva;
2535 MonoImage* img;
2536 gpointer loc;
2537 MonoGenericContainer *container;
2538
2539 error_init (error);
2540 img = method->klass->image;
2541
2542 if ((method->flags & METHOD_ATTRIBUTE_ABSTRACT) || (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) || (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) || (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
2543 mono_error_set_bad_image (error, img, "Method has no body");
2544 return NULL;
2545 }
2546
2547 if (method->is_inflated) {
2548 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
2549 MonoMethodHeader *header, *iheader;
2550
2551 header = mono_method_get_header_checked (imethod->declaring, error);
2552 if (!header)
2553 return NULL;
2554
2555 iheader = inflate_generic_header (header, mono_method_get_context (method), error);
2556 mono_metadata_free_mh (header);
2557 if (!iheader) {
2558 return NULL;
2559 }
2560
2561 return iheader;
2562 }
2563
2564 if (method->wrapper_type != MONO_WRAPPER_NONE || method->sre_method) {
2565 MonoMethodWrapper *mw = (MonoMethodWrapper *)method;
2566 g_assert (mw->header);
2567 return mw->header;
2568 }
2569
2570 /*
2571 * We don't need locks here: the new header is allocated from malloc memory
2572 * and is not stored anywhere in the runtime, the user needs to free it.
2573 */
2574 g_assert (mono_metadata_token_table (method->token) == MONO_TABLE_METHOD);
2575 idx = mono_metadata_token_index (method->token);
2576 rva = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_RVA);
2577
2578 if (!mono_verifier_verify_method_header (img, rva, NULL)) {
2579 mono_error_set_bad_image (error, img, "Invalid method header, failed verification");
2580 return NULL;
2581 }
2582
2583 loc = mono_image_rva_map (img, rva);
2584 if (!loc) {
2585 mono_error_set_bad_image (error, img, "Method has zero rva");
2586 return NULL;
2587 }
2588
2589 /*
2590 * When parsing the types of local variables, we must pass any container available
2591 * to ensure that both VAR and MVAR will get the right owner.
2592 */
2593 container = mono_method_get_generic_container (method);
2594 if (!container)
2595 container = mono_class_try_get_generic_container (method->klass);
2596 return mono_metadata_parse_mh_full (img, container, (const char *)loc, error);
2597 }
2598
2599 MonoMethodHeader*
2600 mono_method_get_header (MonoMethod *method)
2601 {
2602 MonoError error;
2603 MonoMethodHeader *header = mono_method_get_header_checked (method, &error);
2604 mono_error_cleanup (&error);
2605 return header;
2606 }
2607
2608
2609 guint32
2610 mono_method_get_flags (MonoMethod *method, guint32 *iflags)
2611 {
2612 if (iflags)
2613 *iflags = method->iflags;
2614 return method->flags;
2615 }
2616
2617 /*
2618 * Find the method index in the metadata methodDef table.
2619 */
2620 guint32
2621 mono_method_get_index (MonoMethod *method)
2622 {
2623 MonoClass *klass = method->klass;
2624 int i;
2625
2626 if (klass->rank)
2627 /* constructed array methods are not in the MethodDef table */
2628 return 0;
2629
2630 if (method->token)
2631 return mono_metadata_token_index (method->token);
2632
2633 mono_class_setup_methods (klass);
2634 if (mono_class_has_failure (klass))
2635 return 0;
2636 int first_idx = mono_class_get_first_method_idx (klass);
2637 int mcount = mono_class_get_method_count (klass);
2638 for (i = 0; i < mcount; ++i) {
2639 if (method == klass->methods [i]) {
2640 if (klass->image->uncompressed_metadata)
2641 return mono_metadata_translate_token_index (klass->image, MONO_TABLE_METHOD, first_idx + i + 1);
2642 else
2643 return first_idx + i + 1;
2644 }
2645 }
2646 return 0;
2647 }
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