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Partially inline mono_method_signature_checked/internal. (#16927)
[mono-project.git] / mono / metadata / loader.c
blob095cb3693d1b5b1ba4139265b372d9def47b7c2d
1 /**
2 * \file
3 * Image Loader
4 *
5 * Authors:
6 * Paolo Molaro (lupus@ximian.com)
7 * Miguel de Icaza (miguel@ximian.com)
8 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 *
10 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 *
14 * This file is used by the interpreter and the JIT engine to locate
15 * assemblies. Used to load AssemblyRef and later to resolve various
16 * kinds of `Refs'.
17 *
18 * TODO:
19 * This should keep track of the assembly versions that we are loading.
20 *
21 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
22 */
23 #include <config.h>
24 #include <glib.h>
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <mono/metadata/metadata.h>
29 #include <mono/metadata/image.h>
30 #include <mono/metadata/assembly.h>
31 #include <mono/metadata/tokentype.h>
32 #include <mono/metadata/tabledefs.h>
33 #include <mono/metadata/metadata-internals.h>
34 #include <mono/metadata/loader.h>
35 #include <mono/metadata/loader-internals.h>
36 #include <mono/metadata/class-init.h>
37 #include <mono/metadata/class-internals.h>
38 #include <mono/metadata/debug-helpers.h>
39 #include <mono/metadata/reflection.h>
40 #include <mono/metadata/profiler-private.h>
41 #include <mono/metadata/exception.h>
42 #include <mono/metadata/marshal.h>
43 #include <mono/metadata/lock-tracer.h>
44 #include <mono/metadata/verify-internals.h>
45 #include <mono/metadata/exception-internals.h>
46 #include <mono/utils/mono-logger-internals.h>
47 #include <mono/utils/mono-dl.h>
48 #include <mono/utils/mono-membar.h>
49 #include <mono/utils/mono-counters.h>
50 #include <mono/utils/mono-error-internals.h>
51 #include <mono/utils/mono-tls.h>
52 #include <mono/utils/mono-path.h>
53
54 MonoDefaults mono_defaults;
55
56 /*
57 * This lock protects the hash tables inside MonoImage used by the metadata
58 * loading functions in class.c and loader.c.
59 *
60 * See domain-internals.h for locking policy in combination with the
61 * domain lock.
62 */
63 static MonoCoopMutex loader_mutex;
64 static mono_mutex_t global_loader_data_mutex;
65 static gboolean loader_lock_inited;
66
67 /* Statistics */
68 static gint32 inflated_signatures_size;
69 static gint32 memberref_sig_cache_size;
70 static gint32 methods_size;
71 static gint32 signatures_size;
72
73 /*
74 * This TLS variable holds how many times the current thread has acquired the loader
75 * lock.
76 */
77 static MonoNativeTlsKey loader_lock_nest_id;
78
79 #if ENABLE_NETCORE
80 static int pinvoke_search_directories_count;
81 static char **pinvoke_search_directories;
82 #endif
83
84 static void dllmap_cleanup (void);
85 static void cached_module_cleanup(void);
86
87 static void dllmap_insert_global (const char *dll, const char *func, const char *tdll, const char *tfunc);
88 static void dllmap_insert_image (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfun);
89
90
91 /* Class lazy loading functions */
92 GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
93 GENERATE_TRY_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
94
95 static void
96 global_loader_data_lock (void)
97 {
98 mono_locks_os_acquire (&global_loader_data_mutex, LoaderGlobalDataLock);
99 }
100
101 static void
102 global_loader_data_unlock (void)
103 {
104 mono_locks_os_release (&global_loader_data_mutex, LoaderGlobalDataLock);
105 }
106
107 void
108 mono_loader_init ()
109 {
110 static gboolean inited;
111
112 if (!inited) {
113 mono_coop_mutex_init_recursive (&loader_mutex);
114 mono_os_mutex_init_recursive (&global_loader_data_mutex);
115 loader_lock_inited = TRUE;
116
117 mono_native_tls_alloc (&loader_lock_nest_id, NULL);
118
119 mono_counters_init ();
120 mono_counters_register ("Inflated signatures size",
121 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &inflated_signatures_size);
122 mono_counters_register ("Memberref signature cache size",
123 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &memberref_sig_cache_size);
124 mono_counters_register ("MonoMethod size",
125 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &methods_size);
126 mono_counters_register ("MonoMethodSignature size",
127 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &signatures_size);
128
129 inited = TRUE;
130 }
131 }
132
133 void
134 mono_loader_cleanup (void)
135 {
136 dllmap_cleanup ();
137 cached_module_cleanup ();
138
139 mono_native_tls_free (loader_lock_nest_id);
140
141 mono_coop_mutex_destroy (&loader_mutex);
142 mono_os_mutex_destroy (&global_loader_data_mutex);
143 loader_lock_inited = FALSE;
144 }
145
146 /*
147 * find_cached_memberref_sig:
148 *
149 * Return a cached copy of the memberref signature identified by SIG_IDX.
150 * We use a gpointer since the cache stores both MonoTypes and MonoMethodSignatures.
151 * A cache is needed since the type/signature parsing routines allocate everything
152 * from a mempool, so without a cache, multiple requests for the same signature would
153 * lead to unbounded memory growth. For normal methods/fields this is not a problem
154 * since the resulting methods/fields are cached, but inflated methods/fields cannot
155 * be cached.
156 * LOCKING: Acquires the loader lock.
157 */
158 static gpointer
159 find_cached_memberref_sig (MonoImage *image, guint32 sig_idx)
160 {
161 gpointer res;
162
163 mono_image_lock (image);
164 res = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (sig_idx));
165 mono_image_unlock (image);
166
167 return res;
168 }
169
170 static gpointer
171 cache_memberref_sig (MonoImage *image, guint32 sig_idx, gpointer sig)
172 {
173 gpointer prev_sig;
174
175 mono_image_lock (image);
176 prev_sig = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (sig_idx));
177 if (prev_sig) {
178 /* Somebody got in before us */
179 sig = prev_sig;
180 }
181 else {
182 g_hash_table_insert (image->memberref_signatures, GUINT_TO_POINTER (sig_idx), sig);
183 /* An approximation based on glib 2.18 */
184 mono_atomic_fetch_add_i32 (&memberref_sig_cache_size, sizeof (gpointer) * 4);
185 }
186 mono_image_unlock (image);
187
188 return sig;
189 }
190
191 static MonoClassField*
192 field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass,
193 MonoGenericContext *context, MonoError *error)
194 {
195 MonoClass *klass = NULL;
196 MonoClassField *field;
197 MonoTableInfo *tables = image->tables;
198 MonoType *sig_type;
199 guint32 cols[6];
200 guint32 nindex, class_index;
201 const char *fname;
202 const char *ptr;
203 guint32 idx = mono_metadata_token_index (token);
204
205 error_init (error);
206
207 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
208 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
209 class_index = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
210
211 fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
212
213 if (!mono_verifier_verify_memberref_field_signature (image, cols [MONO_MEMBERREF_SIGNATURE], error))
214 return NULL;
215
216 switch (class_index) {
217 case MONO_MEMBERREF_PARENT_TYPEDEF:
218 klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | nindex, error);
219 break;
220 case MONO_MEMBERREF_PARENT_TYPEREF:
221 klass = mono_class_from_typeref_checked (image, MONO_TOKEN_TYPE_REF | nindex, error);
222 break;
223 case MONO_MEMBERREF_PARENT_TYPESPEC:
224 klass = mono_class_get_and_inflate_typespec_checked (image, MONO_TOKEN_TYPE_SPEC | nindex, context, error);
225 break;
226 default:
227 mono_error_set_bad_image (error, image, "Bad field field '%u' signature 0x%08x", class_index, token);
228 }
229
230 if (!klass)
231 return NULL;
232
233 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
234 mono_metadata_decode_blob_size (ptr, &ptr);
235 /* we may want to check the signature here... */
236
237 if (*ptr++ != 0x6) {
238 mono_error_set_field_missing (error, klass, fname, NULL, "Bad field signature class token %08x field token %08x", class_index, token);
239 return NULL;
240 }
241
242 /* FIXME: This needs a cache, especially for generic instances, since
243 * we ask mono_metadata_parse_type_checked () to allocates everything from a mempool.
244 * FIXME part2, mono_metadata_parse_type_checked actually allows for a transient type instead.
245 * FIXME part3, transient types are not 100% transient, so we need to take care of that first.
246 */
247 sig_type = (MonoType *)find_cached_memberref_sig (image, cols [MONO_MEMBERREF_SIGNATURE]);
248 if (!sig_type) {
249 ERROR_DECL (inner_error);
250 sig_type = mono_metadata_parse_type_checked (image, NULL, 0, FALSE, ptr, &ptr, inner_error);
251 if (sig_type == NULL) {
252 mono_error_set_field_missing (error, klass, fname, NULL, "Could not parse field signature %08x due to: %s", token, mono_error_get_message (inner_error));
253 mono_error_cleanup (inner_error);
254 return NULL;
255 }
256 sig_type = (MonoType *)cache_memberref_sig (image, cols [MONO_MEMBERREF_SIGNATURE], sig_type);
257 }
258
259 mono_class_init_internal (klass); /*FIXME is this really necessary?*/
260 if (retklass)
261 *retklass = klass;
262 field = mono_class_get_field_from_name_full (klass, fname, sig_type);
263
264 if (!field) {
265 mono_error_set_field_missing (error, klass, fname, sig_type, "Could not find field in class");
266 }
267
268 return field;
269 }
270
271 /**
272 * mono_field_from_token:
273 * \deprecated use the \c _checked variant
274 * Notes: runtime code MUST not use this function
275 */
276 MonoClassField*
277 mono_field_from_token (MonoImage *image, guint32 token, MonoClass **retklass, MonoGenericContext *context)
278 {
279 ERROR_DECL (error);
280 MonoClassField *res = mono_field_from_token_checked (image, token, retklass, context, error);
281 mono_error_assert_ok (error);
282 return res;
283 }
284
285 MonoClassField*
286 mono_field_from_token_checked (MonoImage *image, guint32 token, MonoClass **retklass, MonoGenericContext *context, MonoError *error)
287 {
288 MonoClass *k;
289 guint32 type;
290 MonoClassField *field;
291
292 error_init (error);
293
294 if (image_is_dynamic (image)) {
295 MonoClassField *result;
296 MonoClass *handle_class;
297
298 *retklass = NULL;
299 ERROR_DECL (inner_error);
300 result = (MonoClassField *)mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context, inner_error);
301 mono_error_cleanup (inner_error);
302 // This checks the memberref type as well
303 if (!result || handle_class != mono_defaults.fieldhandle_class) {
304 mono_error_set_bad_image (error, image, "Bad field token 0x%08x", token);
305 return NULL;
306 }
307 *retklass = result->parent;
308 return result;
309 }
310
311 if ((field = (MonoClassField *)mono_conc_hashtable_lookup (image->field_cache, GUINT_TO_POINTER (token)))) {
312 *retklass = field->parent;
313 return field;
314 }
315
316 if (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF) {
317 field = field_from_memberref (image, token, retklass, context, error);
318 } else {
319 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
320 if (!type) {
321 mono_error_set_bad_image (error, image, "Invalid field token 0x%08x", token);
322 return NULL;
323 }
324 k = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | type, error);
325 if (!k)
326 return NULL;
327
328 mono_class_init_internal (k);
329 if (retklass)
330 *retklass = k;
331 if (mono_class_has_failure (k)) {
332 ERROR_DECL (causedby_error);
333 mono_error_set_for_class_failure (causedby_error, k);
334 mono_error_set_bad_image (error, image, "Could not resolve field token 0x%08x, due to: %s", token, mono_error_get_message (causedby_error));
335 mono_error_cleanup (causedby_error);
336 } else {
337 field = mono_class_get_field (k, token);
338 if (!field) {
339 mono_error_set_bad_image (error, image, "Could not resolve field token 0x%08x", token);
340 }
341 }
342 }
343
344 if (field && field->parent && !mono_class_is_ginst (field->parent) && !mono_class_is_gtd (field->parent)) {
345 mono_image_lock (image);
346 mono_conc_hashtable_insert (image->field_cache, GUINT_TO_POINTER (token), field);
347 mono_image_unlock (image);
348 }
349
350 return field;
351 }
352
353 static gboolean
354 mono_metadata_signature_vararg_match (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
355 {
356 int i;
357
358 if (sig1->hasthis != sig2->hasthis ||
359 sig1->sentinelpos != sig2->sentinelpos)
360 return FALSE;
361
362 for (i = 0; i < sig1->sentinelpos; i++) {
363 MonoType *p1 = sig1->params[i];
364 MonoType *p2 = sig2->params[i];
365
366 /*if (p1->attrs != p2->attrs)
367 return FALSE;
368 */
369 if (!mono_metadata_type_equal (p1, p2))
370 return FALSE;
371 }
372
373 if (!mono_metadata_type_equal (sig1->ret, sig2->ret))
374 return FALSE;
375 return TRUE;
376 }
377
378 static MonoMethod *
379 find_method_in_class (MonoClass *klass, const char *name, const char *qname, const char *fqname,
380 MonoMethodSignature *sig, MonoClass *from_class, MonoError *error)
381 {
382 int i;
383
384 /* Search directly in the metadata to avoid calling setup_methods () */
385 error_init (error);
386
387 MonoImage *klass_image = m_class_get_image (klass);
388 /* FIXME: !mono_class_is_ginst (from_class) condition causes test failures. */
389 if (m_class_get_type_token (klass) && !image_is_dynamic (klass_image) && !m_class_get_methods (klass) && !m_class_get_rank (klass) && klass == from_class && !mono_class_is_ginst (from_class)) {
390 int first_idx = mono_class_get_first_method_idx (klass);
391 int mcount = mono_class_get_method_count (klass);
392 for (i = 0; i < mcount; ++i) {
393 guint32 cols [MONO_METHOD_SIZE];
394 MonoMethod *method;
395 const char *m_name;
396 MonoMethodSignature *other_sig;
397
398 mono_metadata_decode_table_row (klass_image, MONO_TABLE_METHOD, first_idx + i, cols, MONO_METHOD_SIZE);
399
400 m_name = mono_metadata_string_heap (klass_image, cols [MONO_METHOD_NAME]);
401
402 if (!((fqname && !strcmp (m_name, fqname)) ||
403 (qname && !strcmp (m_name, qname)) ||
404 (name && !strcmp (m_name, name))))
405 continue;
406
407 method = mono_get_method_checked (klass_image, MONO_TOKEN_METHOD_DEF | (first_idx + i + 1), klass, NULL, error);
408 if (!is_ok (error)) //bail out if we hit a loader error
409 return NULL;
410 if (method) {
411 other_sig = mono_method_signature_checked (method, error);
412 if (!is_ok (error)) //bail out if we hit a loader error
413 return NULL;
414 if (other_sig && (sig->call_convention != MONO_CALL_VARARG) && mono_metadata_signature_equal (sig, other_sig))
415 return method;
416 }
417 }
418 }
419
420 mono_class_setup_methods (klass); /* FIXME don't swallow the error here. */
421 /*
422 We can't fail lookup of methods otherwise the runtime will fail with MissingMethodException instead of TypeLoadException.
423 See mono/tests/generic-type-load-exception.2.il
424 FIXME we should better report this error to the caller
425 */
426 if (!m_class_get_methods (klass) || mono_class_has_failure (klass)) {
427 ERROR_DECL (cause_error);
428 mono_error_set_for_class_failure (cause_error, klass);
429 mono_error_set_type_load_class (error, klass, "Could not find method '%s' due to a type load error: %s", name, mono_error_get_message (cause_error));
430 mono_error_cleanup (cause_error);
431 return NULL;
432 }
433 int mcount = mono_class_get_method_count (klass);
434 MonoMethod **klass_methods = m_class_get_methods (klass);
435 for (i = 0; i < mcount; ++i) {
436 MonoMethod *m = klass_methods [i];
437 MonoMethodSignature *msig;
438
439 /* We must cope with failing to load some of the types. */
440 if (!m)
441 continue;
442
443 if (!((fqname && !strcmp (m->name, fqname)) ||
444 (qname && !strcmp (m->name, qname)) ||
445 (name && !strcmp (m->name, name))))
446 continue;
447 msig = mono_method_signature_checked (m, error);
448 if (!is_ok (error)) //bail out if we hit a loader error
449 return NULL;
450
451 if (!msig)
452 continue;
453
454 if (sig->call_convention == MONO_CALL_VARARG) {
455 if (mono_metadata_signature_vararg_match (sig, msig))
456 break;
457 } else {
458 if (mono_metadata_signature_equal (sig, msig))
459 break;
460 }
461 }
462
463 if (i < mcount)
464 return mono_class_get_method_by_index (from_class, i);
465 return NULL;
466 }
467
468 static MonoMethod *
469 find_method (MonoClass *in_class, MonoClass *ic, const char* name, MonoMethodSignature *sig, MonoClass *from_class, MonoError *error)
470 {
471 int i;
472 char *qname, *fqname, *class_name;
473 gboolean is_interface;
474 MonoMethod *result = NULL;
475 MonoClass *initial_class = in_class;
476
477 error_init (error);
478 is_interface = MONO_CLASS_IS_INTERFACE_INTERNAL (in_class);
479
480 if (ic) {
481 class_name = mono_type_get_name_full (m_class_get_byval_arg (ic), MONO_TYPE_NAME_FORMAT_IL);
482
483 qname = g_strconcat (class_name, ".", name, (const char*)NULL);
484 const char *ic_name_space = m_class_get_name_space (ic);
485 if (ic_name_space && ic_name_space [0])
486 fqname = g_strconcat (ic_name_space, ".", class_name, ".", name, (const char*)NULL);
487 else
488 fqname = NULL;
489 } else
490 class_name = qname = fqname = NULL;
491
492 while (in_class) {
493 g_assert (from_class);
494 result = find_method_in_class (in_class, name, qname, fqname, sig, from_class, error);
495 if (result || !is_ok (error))
496 goto out;
497
498 if (name [0] == '.' && (!strcmp (name, ".ctor") || !strcmp (name, ".cctor")))
499 break;
500
501 /*
502 * This happens when we fail to lazily load the interfaces of one of the types.
503 * On such case we can't just bail out since user code depends on us trying harder.
504 */
505 if (m_class_get_interface_offsets_count (from_class) != m_class_get_interface_offsets_count (in_class)) {
506 in_class = m_class_get_parent (in_class);
507 from_class = m_class_get_parent (from_class);
508 continue;
509 }
510
511 int in_class_interface_offsets_count = m_class_get_interface_offsets_count (in_class);
512 MonoClass **in_class_interfaces_packed = m_class_get_interfaces_packed (in_class);
513 MonoClass **from_class_interfaces_packed = m_class_get_interfaces_packed (from_class);
514 for (i = 0; i < in_class_interface_offsets_count; i++) {
515 MonoClass *in_ic = in_class_interfaces_packed [i];
516 MonoClass *from_ic = from_class_interfaces_packed [i];
517 char *ic_qname, *ic_fqname, *ic_class_name;
518
519 ic_class_name = mono_type_get_name_full (m_class_get_byval_arg (in_ic), MONO_TYPE_NAME_FORMAT_IL);
520 ic_qname = g_strconcat (ic_class_name, ".", name, (const char*)NULL);
521 const char *in_ic_name_space = m_class_get_name_space (in_ic);
522 if (in_ic_name_space && in_ic_name_space [0])
523 ic_fqname = g_strconcat (in_ic_name_space, ".", ic_class_name, ".", name, (const char*)NULL);
524 else
525 ic_fqname = NULL;
526
527 result = find_method_in_class (in_ic, ic ? name : NULL, ic_qname, ic_fqname, sig, from_ic, error);
528 g_free (ic_class_name);
529 g_free (ic_fqname);
530 g_free (ic_qname);
531 if (result || !is_ok (error))
532 goto out;
533 }
534
535 in_class = m_class_get_parent (in_class);
536 from_class = m_class_get_parent (from_class);
537 }
538 g_assert (!in_class == !from_class);
539
540 if (is_interface)
541 result = find_method_in_class (mono_defaults.object_class, name, qname, fqname, sig, mono_defaults.object_class, error);
542
543 //we did not find the method
544 if (!result && is_ok (error))
545 mono_error_set_method_missing (error, initial_class, name, sig, NULL);
546
547 out:
548 g_free (class_name);
549 g_free (fqname);
550 g_free (qname);
551 return result;
552 }
553
554 static MonoMethodSignature*
555 inflate_generic_signature_checked (MonoImage *image, MonoMethodSignature *sig, MonoGenericContext *context, MonoError *error)
556 {
557 MonoMethodSignature *res;
558 gboolean is_open;
559 int i;
560
561 error_init (error);
562 if (!context)
563 return sig;
564
565 res = (MonoMethodSignature *)g_malloc0 (MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)sig->param_count) * sizeof (MonoType*));
566 res->param_count = sig->param_count;
567 res->sentinelpos = -1;
568 res->ret = mono_class_inflate_generic_type_checked (sig->ret, context, error);
569 if (!is_ok (error))
570 goto fail;
571 is_open = mono_class_is_open_constructed_type (res->ret);
572 for (i = 0; i < sig->param_count; ++i) {
573 res->params [i] = mono_class_inflate_generic_type_checked (sig->params [i], context, error);
574 if (!is_ok (error))
575 goto fail;
576
577 if (!is_open)
578 is_open = mono_class_is_open_constructed_type (res->params [i]);
579 }
580 res->hasthis = sig->hasthis;
581 res->explicit_this = sig->explicit_this;
582 res->call_convention = sig->call_convention;
583 res->pinvoke = sig->pinvoke;
584 res->generic_param_count = sig->generic_param_count;
585 res->sentinelpos = sig->sentinelpos;
586 res->has_type_parameters = is_open;
587 res->is_inflated = 1;
588 return res;
589
590 fail:
591 if (res->ret)
592 mono_metadata_free_type (res->ret);
593 for (i = 0; i < sig->param_count; ++i) {
594 if (res->params [i])
595 mono_metadata_free_type (res->params [i]);
596 }
597 g_free (res);
598 return NULL;
599 }
600
601 /**
602 * mono_inflate_generic_signature:
603 *
604 * Inflate \p sig with \p context, and return a canonical copy. On error, set \p error, and return NULL.
605 */
606 MonoMethodSignature*
607 mono_inflate_generic_signature (MonoMethodSignature *sig, MonoGenericContext *context, MonoError *error)
608 {
609 MonoMethodSignature *res, *cached;
610
611 res = inflate_generic_signature_checked (NULL, sig, context, error);
612 if (!is_ok (error))
613 return NULL;
614 cached = mono_metadata_get_inflated_signature (res, context);
615 if (cached != res)
616 mono_metadata_free_inflated_signature (res);
617 return cached;
618 }
619
620 static MonoMethodHeader*
621 inflate_generic_header (MonoMethodHeader *header, MonoGenericContext *context, MonoError *error)
622 {
623 size_t locals_size = sizeof (gpointer) * header->num_locals;
624 size_t clauses_size = header->num_clauses * sizeof (MonoExceptionClause);
625 size_t header_size = MONO_SIZEOF_METHOD_HEADER + locals_size + clauses_size;
626 MonoMethodHeader *res = (MonoMethodHeader *)g_malloc0 (header_size);
627 res->num_locals = header->num_locals;
628 res->clauses = (MonoExceptionClause *) &res->locals [res->num_locals] ;
629 memcpy (res->clauses, header->clauses, clauses_size);
630
631 res->code = header->code;
632 res->code_size = header->code_size;
633 res->max_stack = header->max_stack;
634 res->num_clauses = header->num_clauses;
635 res->init_locals = header->init_locals;
636
637 res->is_transient = TRUE;
638
639 error_init (error);
640
641 for (int i = 0; i < header->num_locals; ++i) {
642 res->locals [i] = mono_class_inflate_generic_type_checked (header->locals [i], context, error);
643 goto_if_nok (error, fail);
644 }
645 if (res->num_clauses) {
646 for (int i = 0; i < header->num_clauses; ++i) {
647 MonoExceptionClause *clause = &res->clauses [i];
648 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE)
649 continue;
650 clause->data.catch_class = mono_class_inflate_generic_class_checked (clause->data.catch_class, context, error);
651 goto_if_nok (error, fail);
652 }
653 }
654 return res;
655 fail:
656 g_free (res);
657 return NULL;
658 }
659
660 /**
661 * mono_method_get_signature_full:
662 * \p token is the method ref/def/spec token used in a \c call IL instruction.
663 * \deprecated use the \c _checked variant
664 * Notes: runtime code MUST not use this function
665 */
666 MonoMethodSignature*
667 mono_method_get_signature_full (MonoMethod *method, MonoImage *image, guint32 token, MonoGenericContext *context)
668 {
669 ERROR_DECL (error);
670 MonoMethodSignature *res = mono_method_get_signature_checked (method, image, token, context, error);
671 mono_error_cleanup (error);
672 return res;
673 }
674
675 MonoMethodSignature*
676 mono_method_get_signature_checked (MonoMethod *method, MonoImage *image, guint32 token, MonoGenericContext *context, MonoError *error)
677 {
678 int table = mono_metadata_token_table (token);
679 int idx = mono_metadata_token_index (token);
680 int sig_idx;
681 guint32 cols [MONO_MEMBERREF_SIZE];
682 MonoMethodSignature *sig;
683 const char *ptr;
684
685 error_init (error);
686
687 /* !table is for wrappers: we should really assign their own token to them */
688 if (!table || table == MONO_TABLE_METHOD)
689 return mono_method_signature_checked (method, error);
690
691 if (table == MONO_TABLE_METHODSPEC) {
692 /* the verifier (do_invoke_method) will turn the NULL into a verifier error */
693 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) || !method->is_inflated) {
694 mono_error_set_bad_image (error, image, "Method is a pinvoke or open generic");
695 return NULL;
696 }
697
698 return mono_method_signature_checked (method, error);
699 }
700
701 if (mono_class_is_ginst (method->klass))
702 return mono_method_signature_checked (method, error);
703
704 if (image_is_dynamic (image)) {
705 sig = mono_reflection_lookup_signature (image, method, token, error);
706 if (!sig)
707 return NULL;
708 } else {
709 mono_metadata_decode_row (&image->tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
710 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
711
712 sig = (MonoMethodSignature *)find_cached_memberref_sig (image, sig_idx);
713 if (!sig) {
714 if (!mono_verifier_verify_memberref_method_signature (image, sig_idx, error))
715 return NULL;
716
717 ptr = mono_metadata_blob_heap (image, sig_idx);
718 mono_metadata_decode_blob_size (ptr, &ptr);
719
720 sig = mono_metadata_parse_method_signature_full (image, NULL, 0, ptr, NULL, error);
721 if (!sig)
722 return NULL;
723
724 sig = (MonoMethodSignature *)cache_memberref_sig (image, sig_idx, sig);
725 }
726 /* FIXME: we probably should verify signature compat in the dynamic case too*/
727 if (!mono_verifier_is_sig_compatible (image, method, sig)) {
728 guint32 klass = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
729 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
730
731 mono_error_set_bad_image (error, image, "Incompatible method signature class token 0x%08x field name %s token 0x%08x", klass, fname, token);
732 return NULL;
733 }
734 }
735
736 if (context) {
737 MonoMethodSignature *cached;
738
739 /* This signature is not owned by a MonoMethod, so need to cache */
740 sig = inflate_generic_signature_checked (image, sig, context, error);
741 if (!is_ok (error))
742 return NULL;
743
744 cached = mono_metadata_get_inflated_signature (sig, context);
745 if (cached != sig)
746 mono_metadata_free_inflated_signature (sig);
747 else
748 mono_atomic_fetch_add_i32 (&inflated_signatures_size, mono_metadata_signature_size (cached));
749 sig = cached;
750 }
751
752 g_assert (is_ok (error));
753 return sig;
754 }
755
756 /**
757 * mono_method_get_signature:
758 * \p token is the method_ref/def/spec token used in a call IL instruction.
759 * \deprecated use the \c _checked variant
760 * Notes: runtime code MUST not use this function
761 */
762 MonoMethodSignature*
763 mono_method_get_signature (MonoMethod *method, MonoImage *image, guint32 token)
764 {
765 ERROR_DECL (error);
766 MonoMethodSignature *res = mono_method_get_signature_checked (method, image, token, NULL, error);
767 mono_error_cleanup (error);
768 return res;
769 }
770
771 /* this is only for the typespec array methods */
772 MonoMethod*
773 mono_method_search_in_array_class (MonoClass *klass, const char *name, MonoMethodSignature *sig)
774 {
775 int i;
776
777 mono_class_setup_methods (klass);
778 g_assert (!mono_class_has_failure (klass)); /*FIXME this should not fail, right?*/
779 int mcount = mono_class_get_method_count (klass);
780 MonoMethod **klass_methods = m_class_get_methods (klass);
781 for (i = 0; i < mcount; ++i) {
782 MonoMethod *method = klass_methods [i];
783 if (strcmp (method->name, name) == 0 && sig->param_count == method->signature->param_count)
784 return method;
785 }
786 return NULL;
787 }
788
789 static MonoMethod *
790 method_from_memberref (MonoImage *image, guint32 idx, MonoGenericContext *typespec_context,
791 gboolean *used_context, MonoError *error)
792 {
793 MonoClass *klass = NULL;
794 MonoMethod *method = NULL;
795 MonoTableInfo *tables = image->tables;
796 guint32 cols[6];
797 guint32 nindex, class_index, sig_idx;
798 const char *mname;
799 MonoMethodSignature *sig;
800 const char *ptr;
801
802 error_init (error);
803
804 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
805 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
806 class_index = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
807 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
808 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
809
810 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
811
812 /*
813 * Whether we actually used the `typespec_context' or not.
814 * This is used to tell our caller whether or not it's safe to insert the returned
815 * method into a cache.
816 */
817 if (used_context)
818 *used_context = class_index == MONO_MEMBERREF_PARENT_TYPESPEC;
819
820 switch (class_index) {
821 case MONO_MEMBERREF_PARENT_TYPEREF:
822 klass = mono_class_from_typeref_checked (image, MONO_TOKEN_TYPE_REF | nindex, error);
823 if (!klass)
824 goto fail;
825 break;
826 case MONO_MEMBERREF_PARENT_TYPESPEC:
827 /*
828 * Parse the TYPESPEC in the parent's context.
829 */
830 klass = mono_class_get_and_inflate_typespec_checked (image, MONO_TOKEN_TYPE_SPEC | nindex, typespec_context, error);
831 if (!klass)
832 goto fail;
833 break;
834 case MONO_MEMBERREF_PARENT_TYPEDEF:
835 klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | nindex, error);
836 if (!klass)
837 goto fail;
838 break;
839 case MONO_MEMBERREF_PARENT_METHODDEF: {
840 method = mono_get_method_checked (image, MONO_TOKEN_METHOD_DEF | nindex, NULL, NULL, error);
841 if (!method)
842 goto fail;
843 return method;
844 }
845 default:
846 mono_error_set_bad_image (error, image, "Memberref parent unknown: class: %d, index %d", class_index, nindex);
847 goto fail;
848 }
849
850 g_assert (klass);
851 mono_class_init_internal (klass);
852
853 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
854
855 if (!mono_verifier_verify_memberref_method_signature (image, sig_idx, error))
856 goto fail;
857
858 ptr = mono_metadata_blob_heap (image, sig_idx);
859 mono_metadata_decode_blob_size (ptr, &ptr);
860
861 sig = (MonoMethodSignature *)find_cached_memberref_sig (image, sig_idx);
862 if (!sig) {
863 sig = mono_metadata_parse_method_signature_full (image, NULL, 0, ptr, NULL, error);
864 if (sig == NULL)
865 goto fail;
866
867 sig = (MonoMethodSignature *)cache_memberref_sig (image, sig_idx, sig);
868 }
869
870 switch (class_index) {
871 case MONO_MEMBERREF_PARENT_TYPEREF:
872 case MONO_MEMBERREF_PARENT_TYPEDEF:
873 method = find_method (klass, NULL, mname, sig, klass, error);
874 break;
875
876 case MONO_MEMBERREF_PARENT_TYPESPEC: {
877 MonoType *type;
878
879 type = m_class_get_byval_arg (klass);
880
881 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
882 MonoClass *in_class = mono_class_is_ginst (klass) ? mono_class_get_generic_class (klass)->container_class : klass;
883 method = find_method (in_class, NULL, mname, sig, klass, error);
884 break;
885 }
886
887 /* we're an array and we created these methods already in klass in mono_class_init_internal () */
888 method = mono_method_search_in_array_class (klass, mname, sig);
889 break;
890 }
891 default:
892 mono_error_set_bad_image (error, image,"Memberref parent unknown: class: %d, index %d", class_index, nindex);
893 goto fail;
894 }
895
896 if (!method && is_ok (error))
897 mono_error_set_method_missing (error, klass, mname, sig, "Failed to load due to unknown reasons");
898
899 return method;
900
901 fail:
902 g_assert (!is_ok (error));
903 return NULL;
904 }
905
906 static MonoMethod *
907 method_from_methodspec (MonoImage *image, MonoGenericContext *context, guint32 idx, MonoError *error)
908 {
909 MonoMethod *method;
910 MonoClass *klass;
911 MonoTableInfo *tables = image->tables;
912 MonoGenericContext new_context;
913 MonoGenericInst *inst;
914 const char *ptr;
915 guint32 cols [MONO_METHODSPEC_SIZE];
916 guint32 token, nindex, param_count;
917
918 error_init (error);
919
920 mono_metadata_decode_row (&tables [MONO_TABLE_METHODSPEC], idx - 1, cols, MONO_METHODSPEC_SIZE);
921 token = cols [MONO_METHODSPEC_METHOD];
922 nindex = token >> MONO_METHODDEFORREF_BITS;
923
924 if (!mono_verifier_verify_methodspec_signature (image, cols [MONO_METHODSPEC_SIGNATURE], error))
925 return NULL;
926
927 ptr = mono_metadata_blob_heap (image, cols [MONO_METHODSPEC_SIGNATURE]);
928
929 mono_metadata_decode_value (ptr, &ptr);
930 ptr++;
931 param_count = mono_metadata_decode_value (ptr, &ptr);
932
933 inst = mono_metadata_parse_generic_inst (image, NULL, param_count, ptr, &ptr, error);
934 if (!inst)
935 return NULL;
936
937 if (context && inst->is_open) {
938 inst = mono_metadata_inflate_generic_inst (inst, context, error);
939 if (!is_ok (error))
940 return NULL;
941 }
942
943 if ((token & MONO_METHODDEFORREF_MASK) == MONO_METHODDEFORREF_METHODDEF) {
944 method = mono_get_method_checked (image, MONO_TOKEN_METHOD_DEF | nindex, NULL, context, error);
945 if (!method)
946 return NULL;
947 } else {
948 method = method_from_memberref (image, nindex, context, NULL, error);
949 }
950
951 if (!method)
952 return NULL;
953
954 klass = method->klass;
955
956 if (mono_class_is_ginst (klass)) {
957 g_assert (method->is_inflated);
958 method = ((MonoMethodInflated *) method)->declaring;
959 }
960
961 new_context.class_inst = mono_class_is_ginst (klass) ? mono_class_get_generic_class (klass)->context.class_inst : NULL;
962 new_context.method_inst = inst;
963
964 method = mono_class_inflate_generic_method_full_checked (method, klass, &new_context, error);
965 return method;
966 }
967
968 struct _MonoDllMap {
969 char *dll;
970 char *target;
971 char *func;
972 char *target_func;
973 MonoDllMap *next;
974 };
975
976 static MonoDllMap *global_dll_map;
977
978 static int
979 mono_dllmap_lookup_list (MonoDllMap *dll_map, const char *dll, const char* func, const char **rdll, const char **rfunc) {
980 int found = 0;
981
982 *rdll = dll;
983
984 if (!dll_map)
985 return 0;
986
987 global_loader_data_lock ();
988
989 /*
990 * we use the first entry we find that matches, since entries from
991 * the config file are prepended to the list and we document that the
992 * later entries win.
993 */
994 for (; dll_map; dll_map = dll_map->next) {
995 if (dll_map->dll [0] == 'i' && dll_map->dll [1] == ':') {
996 if (g_ascii_strcasecmp (dll_map->dll + 2, dll))
997 continue;
998 } else if (strcmp (dll_map->dll, dll)) {
999 continue;
1000 }
1001 if (!found && dll_map->target) {
1002 *rdll = dll_map->target;
1003 found = 1;
1004 /* we don't quit here, because we could find a full
1005 * entry that matches also function and that has priority.
1006 */
1007 }
1008 if (dll_map->func && strcmp (dll_map->func, func) == 0) {
1009 *rdll = dll_map->target;
1010 *rfunc = dll_map->target_func;
1011 break;
1012 }
1013 }
1014
1015 global_loader_data_unlock ();
1016 return found;
1017 }
1018
1019 static int
1020 mono_dllmap_lookup (MonoImage *assembly, const char *dll, const char* func, const char **rdll, const char **rfunc)
1021 {
1022 int res;
1023 if (assembly && assembly->dll_map) {
1024 res = mono_dllmap_lookup_list (assembly->dll_map, dll, func, rdll, rfunc);
1025 if (res)
1026 return res;
1027 }
1028 return mono_dllmap_lookup_list (global_dll_map, dll, func, rdll, rfunc);
1029 }
1030
1031 /**
1032 * mono_dllmap_insert:
1033 * \param assembly if NULL, this is a global mapping, otherwise the remapping of the dynamic library will only apply to the specified assembly
1034 * \param dll The name of the external library, as it would be found in the \c DllImport declaration. If prefixed with <code>i:</code> the matching of the library name is done without case sensitivity
1035 * \param func if not null, the mapping will only applied to the named function (the value of <code>EntryPoint</code>)
1036 * \param tdll The name of the library to map the specified \p dll if it matches.
1037 * \param tfunc The name of the function that replaces the invocation. If NULL, it is replaced with a copy of \p func.
1038 *
1039 * LOCKING: Acquires the loader lock.
1040 *
1041 * This function is used to programatically add \c DllImport remapping in either
1042 * a specific assembly, or as a global remapping. This is done by remapping
1043 * references in a \c DllImport attribute from the \p dll library name into the \p tdll
1044 * name. If the \p dll name contains the prefix <code>i:</code>, the comparison of the
1045 * library name is done without case sensitivity.
1046 *
1047 * If you pass \p func, this is the name of the \c EntryPoint in a \c DllImport if specified
1048 * or the name of the function as determined by \c DllImport. If you pass \p func, you
1049 * must also pass \p tfunc which is the name of the target function to invoke on a match.
1050 *
1051 * Example:
1052 *
1053 * <code>mono_dllmap_insert (NULL, "i:libdemo.dll", NULL, relocated_demo_path, NULL);</code>
1054 *
1055 * The above will remap \c DllImport statements for \c libdemo.dll and \c LIBDEMO.DLL to
1056 * the contents of \c relocated_demo_path for all assemblies in the Mono process.
1057 *
1058 * NOTE: This can be called before the runtime is initialized, for example from
1059 * \c mono_config_parse.
1060 */
1061 void
1062 mono_dllmap_insert (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfunc)
1063 {
1064 if (!assembly)
1065 dllmap_insert_global (dll, func, tdll, tfunc);
1066 else {
1067 MONO_ENTER_GC_UNSAFE;
1068 dllmap_insert_image (assembly, dll, func, tdll, tfunc);
1069 MONO_EXIT_GC_UNSAFE;
1070 }
1071 }
1072
1073 void
1074 dllmap_insert_global (const char *dll, const char *func, const char *tdll, const char *tfunc)
1075 {
1076 MonoDllMap *entry;
1077
1078 mono_loader_init ();
1079
1080 entry = (MonoDllMap *)g_malloc0 (sizeof (MonoDllMap));
1081 entry->dll = dll? g_strdup (dll): NULL;
1082 entry->target = tdll? g_strdup (tdll): NULL;
1083 entry->func = func? g_strdup (func): NULL;
1084 entry->target_func = tfunc? g_strdup (tfunc): (func? g_strdup (func): NULL);
1085
1086 global_loader_data_lock ();
1087 entry->next = global_dll_map;
1088 global_dll_map = entry;
1089 global_loader_data_unlock ();
1090 }
1091
1092 void
1093 dllmap_insert_image (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfunc)
1094 {
1095 MonoDllMap *entry;
1096 g_assert (assembly != NULL);
1097
1098 mono_loader_init ();
1099
1100 entry = (MonoDllMap *)mono_image_alloc0 (assembly, sizeof (MonoDllMap));
1101 entry->dll = dll? mono_image_strdup (assembly, dll): NULL;
1102 entry->target = tdll? mono_image_strdup (assembly, tdll): NULL;
1103 entry->func = func? mono_image_strdup (assembly, func): NULL;
1104 entry->target_func = tfunc? mono_image_strdup (assembly, tfunc): (func? mono_image_strdup (assembly, func): NULL);
1105
1106 mono_image_lock (assembly);
1107 entry->next = assembly->dll_map;
1108 assembly->dll_map = entry;
1109 mono_image_unlock (assembly);
1110 }
1111
1112 static void
1113 free_dllmap (MonoDllMap *map)
1114 {
1115 while (map) {
1116 MonoDllMap *next = map->next;
1117
1118 g_free (map->dll);
1119 g_free (map->target);
1120 g_free (map->func);
1121 g_free (map->target_func);
1122 g_free (map);
1123 map = next;
1124 }
1125 }
1126
1127 static void
1128 dllmap_cleanup (void)
1129 {
1130 free_dllmap (global_dll_map);
1131 global_dll_map = NULL;
1132 }
1133
1134 static GHashTable *global_module_map;
1135
1136 static MonoDl*
1137 cached_module_load (const char *name, int flags, char **err)
1138 {
1139 MonoDl *res;
1140
1141 if (err)
1142 *err = NULL;
1143 global_loader_data_lock ();
1144 if (!global_module_map)
1145 global_module_map = g_hash_table_new (g_str_hash, g_str_equal);
1146 res = (MonoDl *)g_hash_table_lookup (global_module_map, name);
1147 if (res) {
1148 global_loader_data_unlock ();
1149 return res;
1150 }
1151 res = mono_dl_open (name, flags, err);
1152 if (res)
1153 g_hash_table_insert (global_module_map, g_strdup (name), res);
1154 global_loader_data_unlock ();
1155 return res;
1156 }
1157
1158 void
1159 mono_loader_register_module (const char *name, MonoDl *module)
1160 {
1161 if (!global_module_map)
1162 global_module_map = g_hash_table_new (g_str_hash, g_str_equal);
1163 g_hash_table_insert (global_module_map, g_strdup (name), module);
1164 }
1165
1166 static void
1167 remove_cached_module(gpointer key, gpointer value, gpointer user_data)
1168 {
1169 mono_dl_close((MonoDl*)value);
1170 }
1171
1172 static void
1173 cached_module_cleanup(void)
1174 {
1175 if (global_module_map != NULL) {
1176 g_hash_table_foreach(global_module_map, remove_cached_module, NULL);
1177
1178 g_hash_table_destroy(global_module_map);
1179 global_module_map = NULL;
1180 }
1181 }
1182
1183 static MonoDl *internal_module;
1184
1185 static gboolean
1186 is_absolute_path (const char *path)
1187 {
1188 #ifdef HOST_DARWIN
1189 if (!strncmp (path, "@executable_path/", 17) || !strncmp (path, "@loader_path/", 13) ||
1190 !strncmp (path, "@rpath/", 7))
1191 return TRUE;
1192 #endif
1193 return g_path_is_absolute (path);
1194 }
1195
1196 typedef enum {
1197 LOOKUP_PINVOKE_ERR_OK = 0, /* No error */
1198 LOOKUP_PINVOKE_ERR_NO_LIB, /* DllNotFoundException */
1199 LOOKUP_PINVOKE_ERR_NO_SYM, /* EntryPointNotFoundException */
1200 } MonoLookupPInvokeErr;
1201
1202 /* We should just use a MonoError, but mono_lookup_pinvoke_call has this legacy
1203 * error reporting mechanism where it returns an exception class and a string
1204 * message. So instead we return an error code and message, and for internal
1205 * callers convert it to a MonoError.
1206 *
1207 * Don't expose this type to the runtime. It's just an implementation
1208 * detail for backward compatability.
1209 */
1210 typedef struct MonoLookupPInvokeStatus {
1211 MonoLookupPInvokeErr err_code;
1212 char *err_arg;
1213 } MonoLookupPInvokeStatus;
1214
1215 static gpointer
1216 lookup_pinvoke_call_impl (MonoMethod *method, MonoLookupPInvokeStatus *status_out);
1217
1218 static void
1219 pinvoke_probe_convert_status_for_api (MonoLookupPInvokeStatus *status, const char **exc_class, const char **exc_arg)
1220 {
1221 if (!exc_class)
1222 return;
1223 switch (status->err_code) {
1224 case LOOKUP_PINVOKE_ERR_OK:
1225 *exc_class = NULL;
1226 *exc_arg = NULL;
1227 break;
1228 case LOOKUP_PINVOKE_ERR_NO_LIB:
1229 *exc_class = "DllNotFoundException";
1230 *exc_arg = status->err_arg;
1231 status->err_arg = NULL;
1232 break;
1233 case LOOKUP_PINVOKE_ERR_NO_SYM:
1234 *exc_class = "EntryPointNotFoundException";
1235 *exc_arg = status->err_arg;
1236 status->err_arg = NULL;
1237 break;
1238 default:
1239 g_assert_not_reached ();
1240 }
1241 }
1242
1243 static void
1244 pinvoke_probe_convert_status_to_error (MonoLookupPInvokeStatus *status, MonoError *error)
1245 {
1246 /* Note: this has to return a MONO_ERROR_GENERIC because mono_mb_emit_exception_for_error only knows how to decode generic errors. */
1247 switch (status->err_code) {
1248 case LOOKUP_PINVOKE_ERR_OK:
1249 return;
1250 case LOOKUP_PINVOKE_ERR_NO_LIB:
1251 mono_error_set_generic_error (error, "System", "DllNotFoundException", "%s", status->err_arg);
1252 g_free (status->err_arg);
1253 status->err_arg = NULL;
1254 break;
1255 case LOOKUP_PINVOKE_ERR_NO_SYM:
1256 mono_error_set_generic_error (error, "System", "EntryPointNotFoundException", "%s", status->err_arg);
1257 g_free (status->err_arg);
1258 status->err_arg = NULL;
1259 break;
1260 default:
1261 g_assert_not_reached ();
1262 }
1263 }
1264
1265 /**
1266 * mono_lookup_pinvoke_call:
1267 */
1268 gpointer
1269 mono_lookup_pinvoke_call (MonoMethod *method, const char **exc_class, const char **exc_arg)
1270 {
1271 gpointer result;
1272 MONO_ENTER_GC_UNSAFE;
1273 MonoLookupPInvokeStatus status;
1274 memset (&status, 0, sizeof (status));
1275 result = lookup_pinvoke_call_impl (method, &status);
1276 pinvoke_probe_convert_status_for_api (&status, exc_class, exc_arg);
1277 MONO_EXIT_GC_UNSAFE;
1278 return result;
1279 }
1280
1281 static MonoDl*
1282 pinvoke_probe_for_module (MonoImage *image, const char*new_scope, const char *import, char **found_name_out, char **error_msg_out);
1283
1284 static MonoDl*
1285 pinvoke_probe_for_module_relative_directories (MonoImage *image, const char *file_name, char **found_name_out);
1286
1287 static gpointer
1288 pinvoke_probe_for_symbol (MonoDl *module, MonoMethodPInvoke *piinfo, const char *import, char **error_msg_out);
1289
1290 gpointer
1291 mono_lookup_pinvoke_call_internal (MonoMethod *method, MonoError *error)
1292 {
1293 gpointer result;
1294 MonoLookupPInvokeStatus status;
1295 memset (&status, 0, sizeof (status));
1296 result = lookup_pinvoke_call_impl (method, &status);
1297 if (status.err_code)
1298 pinvoke_probe_convert_status_to_error (&status, error);
1299 return result;
1300 }
1301
1302 gpointer
1303 lookup_pinvoke_call_impl (MonoMethod *method, MonoLookupPInvokeStatus *status_out)
1304 {
1305 MonoImage *image = m_class_get_image (method->klass);
1306 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
1307 MonoTableInfo *tables = image->tables;
1308 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
1309 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
1310 guint32 im_cols [MONO_IMPLMAP_SIZE];
1311 guint32 scope_token;
1312 const char *import = NULL;
1313 const char *orig_scope;
1314 const char *new_scope;
1315 char *error_msg;
1316 char *found_name = NULL;
1317 MonoDl *module = NULL;
1318 gboolean cached = FALSE;
1319 gpointer addr = NULL;
1320
1321 g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
1322
1323 g_assert (status_out);
1324
1325 if (piinfo->addr)
1326 return piinfo->addr;
1327
1328 if (image_is_dynamic (m_class_get_image (method->klass))) {
1329 MonoReflectionMethodAux *method_aux =
1330 (MonoReflectionMethodAux *)g_hash_table_lookup (
1331 ((MonoDynamicImage*)m_class_get_image (method->klass))->method_aux_hash, method);
1332 if (!method_aux)
1333 return NULL;
1334
1335 import = method_aux->dllentry;
1336 orig_scope = method_aux->dll;
1337 }
1338 else {
1339 if (!piinfo->implmap_idx || piinfo->implmap_idx > im->rows)
1340 return NULL;
1341
1342 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
1343
1344 if (!im_cols [MONO_IMPLMAP_SCOPE] || im_cols [MONO_IMPLMAP_SCOPE] > mr->rows)
1345 return NULL;
1346
1347 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
1348 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
1349 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
1350 orig_scope = mono_metadata_string_heap (image, scope_token);
1351 }
1352
1353 #ifndef ENABLE_NETCORE
1354 // FIXME: The dllmap remaps System.Native to mono-native
1355 mono_dllmap_lookup (image, orig_scope, import, &new_scope, &import);
1356 #else
1357 /* AK: FIXME: dllmap, above doesn't strdup the results, so these leak
1358 * since there's no free() */
1359 new_scope = g_strdup (orig_scope);
1360 import = g_strdup (import);
1361 #endif
1362
1363 if (!module) {
1364 mono_image_lock (image);
1365 if (!image->pinvoke_scopes) {
1366 image->pinvoke_scopes = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
1367 image->pinvoke_scope_filenames = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1368 }
1369 module = (MonoDl *)g_hash_table_lookup (image->pinvoke_scopes, new_scope);
1370 found_name = (char *)g_hash_table_lookup (image->pinvoke_scope_filenames, new_scope);
1371 mono_image_unlock (image);
1372 if (module)
1373 cached = TRUE;
1374 if (found_name)
1375 found_name = g_strdup (found_name);
1376 }
1377
1378 if (!module)
1379 module = pinvoke_probe_for_module (image, new_scope, import, &found_name, &error_msg);
1380
1381 if (!module) {
1382 mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_DLLIMPORT,
1383 "DllImport unable to load library '%s'.",
1384 error_msg);
1385 g_free (error_msg);
1386
1387 status_out->err_code = LOOKUP_PINVOKE_ERR_NO_LIB;
1388 status_out->err_arg = g_strdup (new_scope);
1389 return NULL;
1390 }
1391
1392 if (!cached) {
1393 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1394 "DllImport loaded library '%s'.", found_name);
1395 mono_image_lock (image);
1396 if (!g_hash_table_lookup (image->pinvoke_scopes, new_scope)) {
1397 g_hash_table_insert (image->pinvoke_scopes, g_strdup (new_scope), module);
1398 g_hash_table_insert (image->pinvoke_scope_filenames, g_strdup (new_scope), g_strdup (found_name));
1399 }
1400 mono_image_unlock (image);
1401 }
1402
1403 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1404 "DllImport searching in: '%s' ('%s').", new_scope, found_name);
1405 g_free (found_name);
1406
1407 addr = pinvoke_probe_for_symbol (module, piinfo, import, &error_msg);
1408
1409 if (!addr) {
1410 g_free (error_msg);
1411 status_out->err_code = LOOKUP_PINVOKE_ERR_NO_SYM;
1412 status_out->err_arg = g_strdup (import);
1413 return NULL;
1414 }
1415 piinfo->addr = addr;
1416 return addr;
1417 }
1418
1419 /**
1420 * pinvoke_probe_transform_path:
1421 *
1422 * Try transforming the library path given in \p new_scope in different ways
1423 * depending on \p phase
1424 *
1425 * \returns \c TRUE if a transformation was applied and the transformed path
1426 * components are written to the out arguments, or \c FALSE if a transformation
1427 * did not apply.
1428 */
1429 static gboolean
1430 pinvoke_probe_transform_path (const char *new_scope, int phase, char **file_name_out, char **base_name_out, char **dir_name_out, gboolean *is_absolute_out)
1431 {
1432 char *file_name = NULL, *base_name = NULL, *dir_name = NULL;
1433 gboolean changed = FALSE;
1434 gboolean is_absolute = is_absolute_path (new_scope);
1435 switch (phase) {
1436 case 0:
1437 /* Try the original name */
1438 file_name = g_strdup (new_scope);
1439 changed = TRUE;
1440 break;
1441 case 1:
1442 /* Try trimming the .dll extension */
1443 if (strstr (new_scope, ".dll") == (new_scope + strlen (new_scope) - 4)) {
1444 file_name = g_strdup (new_scope);
1445 file_name [strlen (new_scope) - 4] = '\0';
1446 changed = TRUE;
1447 }
1448 break;
1449 case 2:
1450 if (is_absolute) {
1451 dir_name = g_path_get_dirname (new_scope);
1452 base_name = g_path_get_basename (new_scope);
1453 if (strstr (base_name, "lib") != base_name) {
1454 char *tmp = g_strdup_printf ("lib%s", base_name);
1455 g_free (base_name);
1456 base_name = tmp;
1457 file_name = g_strdup_printf ("%s%s%s", dir_name, G_DIR_SEPARATOR_S, base_name);
1458 changed = TRUE;
1459 }
1460 } else if (strstr (new_scope, "lib") != new_scope) {
1461 file_name = g_strdup_printf ("lib%s", new_scope);
1462 changed = TRUE;
1463 }
1464 break;
1465 case 3:
1466 if (!is_absolute && mono_dl_get_system_dir ()) {
1467 dir_name = (char*)mono_dl_get_system_dir ();
1468 file_name = g_path_get_basename (new_scope);
1469 base_name = NULL;
1470 changed = TRUE;
1471 }
1472 break;
1473 default:
1474 #ifndef TARGET_WIN32
1475 if (!g_ascii_strcasecmp ("user32.dll", new_scope) ||
1476 !g_ascii_strcasecmp ("kernel32.dll", new_scope) ||
1477 !g_ascii_strcasecmp ("user32", new_scope) ||
1478 !g_ascii_strcasecmp ("kernel", new_scope)) {
1479 file_name = g_strdup ("libMonoSupportW.so");
1480 changed = TRUE;
1481 }
1482 #endif
1483 break;
1484 }
1485 if (changed && is_absolute) {
1486 if (!dir_name)
1487 dir_name = g_path_get_dirname (file_name);
1488 if (!base_name)
1489 base_name = g_path_get_basename (file_name);
1490 }
1491 *file_name_out = file_name;
1492 *base_name_out = base_name;
1493 *dir_name_out = dir_name;
1494 *is_absolute_out = is_absolute;
1495 return changed;
1496 }
1497
1498 static MonoDl*
1499 pinvoke_probe_for_module (MonoImage *image, const char*new_scope, const char *import, char **found_name_out, char **error_msg_out)
1500 {
1501 char *full_name, *file_name;
1502 char *error_msg = NULL;
1503 char *found_name = NULL;
1504 int i;
1505 MonoDl *module = NULL;
1506
1507 g_assert (found_name_out);
1508 g_assert (error_msg_out);
1509
1510 if (!module) {
1511 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1512 "DllImport attempting to load: '%s'.", new_scope);
1513
1514 /* we allow a special name to dlopen from the running process namespace */
1515 if (strcmp (new_scope, "__Internal") == 0){
1516 if (internal_module == NULL)
1517 internal_module = mono_dl_open (NULL, MONO_DL_LAZY, &error_msg);
1518 module = internal_module;
1519 }
1520 }
1521
1522 /*
1523 * Try loading the module using a variety of names
1524 */
1525 for (i = 0; i < 5; ++i) {
1526 char *base_name = NULL, *dir_name = NULL;
1527 gboolean is_absolute;
1528
1529 gboolean changed = pinvoke_probe_transform_path (new_scope, i, &file_name, &base_name, &dir_name, &is_absolute);
1530 if (!changed)
1531 continue;
1532
1533 if (!module && is_absolute) {
1534 module = cached_module_load (file_name, MONO_DL_LAZY, &error_msg);
1535 if (!module) {
1536 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1537 "DllImport error loading library '%s': '%s'.",
1538 file_name, error_msg);
1539 g_free (error_msg);
1540 } else {
1541 found_name = g_strdup (file_name);
1542 }
1543 }
1544
1545 if (!module && !is_absolute) {
1546 module = pinvoke_probe_for_module_relative_directories (image, file_name, &found_name);
1547 }
1548
1549 if (!module) {
1550 void *iter = NULL;
1551 char *file_or_base = is_absolute ? base_name : file_name;
1552 while ((full_name = mono_dl_build_path (dir_name, file_or_base, &iter))) {
1553 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1554 if (!module) {
1555 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1556 "DllImport error loading library '%s': '%s'.",
1557 full_name, error_msg);
1558 g_free (error_msg);
1559 } else {
1560 found_name = g_strdup (full_name);
1561 }
1562 g_free (full_name);
1563 if (module)
1564 break;
1565 }
1566 }
1567
1568 if (!module) {
1569 module = cached_module_load (file_name, MONO_DL_LAZY, &error_msg);
1570 if (!module) {
1571 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1572 "DllImport error loading library '%s': '%s'.",
1573 file_name, error_msg);
1574 } else {
1575 found_name = g_strdup (file_name);
1576 }
1577 }
1578
1579 g_free (file_name);
1580 if (is_absolute) {
1581 g_free (base_name);
1582 g_free (dir_name);
1583 }
1584
1585 if (module)
1586 break;
1587 }
1588
1589 *found_name_out = found_name;
1590 *error_msg_out = error_msg;
1591 return module;
1592 }
1593
1594 #if ENABLE_NETCORE
1595 void
1596 mono_set_pinvoke_search_directories (int dir_count, char **dirs)
1597 {
1598 pinvoke_search_directories_count = dir_count;
1599 pinvoke_search_directories = dirs;
1600 }
1601 #endif
1602
1603 static MonoDl*
1604 pinvoke_probe_for_module_in_directory (const char *mdirname, const char *file_name, char **found_name_out)
1605 {
1606 void *iter = NULL;
1607 char *full_name;
1608 MonoDl* module = NULL;
1609
1610 while ((full_name = mono_dl_build_path (mdirname, file_name, &iter)) && module == NULL) {
1611 char *error_msg;
1612 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1613 if (!module) {
1614 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT, "DllImport error loading library '%s': '%s'.", full_name, error_msg);
1615 g_free (error_msg);
1616 } else {
1617 *found_name_out = g_strdup (full_name);
1618 }
1619 g_free (full_name);
1620 }
1621 g_free (full_name);
1622
1623 return module;
1624 }
1625
1626 static MonoDl*
1627 pinvoke_probe_for_module_relative_directories (MonoImage *image, const char *file_name, char **found_name_out)
1628 {
1629 char *found_name = NULL;
1630 MonoDl* module = NULL;
1631
1632 g_assert (found_name_out);
1633
1634 #if ENABLE_NETCORE
1635 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_DLLIMPORT, "netcore DllImport handler: wanted '%s'", file_name);
1636
1637 // Search in predefined directories first
1638 for (int j = 0; j < pinvoke_search_directories_count && module == NULL; ++j) {
1639 module = pinvoke_probe_for_module_in_directory (pinvoke_search_directories[j], file_name, &found_name);
1640 }
1641
1642 // Fallback to image directory
1643 if (module == NULL) {
1644 // TODO: Check DefaultDllImportSearchPathsAttribute, NativeLibrary callback
1645 char *mdirname = g_path_get_dirname (image->name);
1646 if (mdirname)
1647 module = pinvoke_probe_for_module_in_directory (mdirname, file_name, &found_name);
1648 g_free (mdirname);
1649 }
1650 #else
1651 for (int j = 0; j < 3; ++j) {
1652 char *mdirname = NULL;
1653 switch (j) {
1654 case 0:
1655 mdirname = g_path_get_dirname (image->name);
1656 break;
1657 case 1: /* @executable_path@/../lib */
1658 {
1659 char buf [4096];
1660 int binl;
1661 binl = mono_dl_get_executable_path (buf, sizeof (buf));
1662 if (binl != -1) {
1663 char *base, *newbase;
1664 char *resolvedname;
1665 buf [binl] = 0;
1666 resolvedname = mono_path_resolve_symlinks (buf);
1667
1668 base = g_path_get_dirname (resolvedname);
1669 newbase = g_path_get_dirname(base);
1670
1671 // On Android the executable for the application is going to be /system/bin/app_process{32,64} depending on
1672 // the application's architecture. However, libraries for the different architectures live in different
1673 // subdirectories of `/system`: `lib` for 32-bit apps and `lib64` for 64-bit ones. Thus appending `/lib` below
1674 // will fail to load the DSO for a 64-bit app, even if it exists there, because it will have a different
1675 // architecture. This is the cause of https://github.com/xamarin/xamarin-android/issues/2780 and the ifdef
1676 // below is the fix.
1677 mdirname = g_strdup_printf (
1678 #if defined(TARGET_ANDROID) && (defined(TARGET_ARM64) || defined(TARGET_AMD64))
1679 "%s/lib64",
1680 #else
1681 "%s/lib",
1682 #endif
1683 newbase);
1684 g_free (resolvedname);
1685 g_free (base);
1686 g_free (newbase);
1687 }
1688 break;
1689 }
1690 #ifdef __MACH__
1691 case 2: /* @executable_path@/../Libraries */
1692 {
1693 char buf [4096];
1694 int binl;
1695 binl = mono_dl_get_executable_path (buf, sizeof (buf));
1696 if (binl != -1) {
1697 char *base, *newbase;
1698 char *resolvedname;
1699 buf [binl] = 0;
1700 resolvedname = mono_path_resolve_symlinks (buf);
1701
1702 base = g_path_get_dirname (resolvedname);
1703 newbase = g_path_get_dirname(base);
1704 mdirname = g_strdup_printf ("%s/Libraries", newbase);
1705
1706 g_free (resolvedname);
1707 g_free (base);
1708 g_free (newbase);
1709 }
1710 break;
1711 }
1712 #endif
1713 }
1714
1715 if (!mdirname)
1716 continue;
1717
1718 module = pinvoke_probe_for_module_in_directory (mdirname, file_name, &found_name);
1719 g_free (mdirname);
1720 if (module)
1721 break;
1722 }
1723 #endif
1724
1725 *found_name_out = found_name;
1726 return module;
1727 }
1728
1729
1730 static gpointer
1731 pinvoke_probe_for_symbol (MonoDl *module, MonoMethodPInvoke *piinfo, const char *import, char **error_msg_out)
1732 {
1733 char *error_msg = NULL;
1734 gpointer addr = NULL;
1735
1736 g_assert (error_msg_out);
1737
1738 #ifdef HOST_WIN32
1739 if (import && import [0] == '#' && isdigit (import [1])) {
1740 char *end;
1741 long id;
1742
1743 id = strtol (import + 1, &end, 10);
1744 if (id > 0 && *end == '\0')
1745 import++;
1746 }
1747 #endif
1748 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1749 "Searching for '%s'.", import);
1750
1751 if (piinfo->piflags & PINVOKE_ATTRIBUTE_NO_MANGLE) {
1752 error_msg = mono_dl_symbol (module, import, &addr);
1753 } else {
1754 /*
1755 * Search using a variety of mangled names
1756 */
1757 for (int mangle_stdcall = 0; mangle_stdcall <= 1 && addr == NULL; mangle_stdcall++) {
1758 #if HOST_WIN32 && HOST_X86
1759 const int max_managle_param_count = (mangle_stdcall == 0) ? 0 : 256;
1760 #else
1761 const int max_managle_param_count = 0;
1762 #endif
1763 for (int mangle_charset = 0; mangle_charset <= 1 && addr == NULL; mangle_charset ++) {
1764 for (int mangle_param_count = 0; mangle_param_count <= max_managle_param_count && addr == NULL; mangle_param_count += 4) {
1765
1766 char *mangled_name = (char*)import;
1767 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CHAR_SET_MASK) {
1768 case PINVOKE_ATTRIBUTE_CHAR_SET_UNICODE:
1769 /* Try the mangled name first */
1770 if (mangle_charset == 0)
1771 mangled_name = g_strconcat (import, "W", (const char*)NULL);
1772 break;
1773 case PINVOKE_ATTRIBUTE_CHAR_SET_AUTO:
1774 #ifdef HOST_WIN32
1775 if (mangle_charset == 0)
1776 mangled_name = g_strconcat (import, "W", (const char*)NULL);
1777 #else
1778 /* Try the mangled name last */
1779 if (mangle_charset == 1)
1780 mangled_name = g_strconcat (import, "A", (const char*)NULL);
1781 #endif
1782 break;
1783 case PINVOKE_ATTRIBUTE_CHAR_SET_ANSI:
1784 default:
1785 /* Try the mangled name last */
1786 if (mangle_charset == 1)
1787 mangled_name = g_strconcat (import, "A", (const char*)NULL);
1788 break;
1789 }
1790
1791 #if HOST_WIN32 && HOST_X86
1792 /* Try the stdcall mangled name */
1793 /*
1794 * gcc under windows creates mangled names without the underscore, but MS.NET
1795 * doesn't support it, so we doesn't support it either.
1796 */
1797 if (mangle_stdcall == 1) {
1798 MonoMethod *method = &piinfo->method;
1799 int param_count;
1800 if (mangle_param_count == 0)
1801 param_count = mono_method_signature_internal (method)->param_count * sizeof (gpointer);
1802 else
1803 /* Try brute force, since it would be very hard to compute the stack usage correctly */
1804 param_count = mangle_param_count;
1805
1806 char *mangled_stdcall_name = g_strdup_printf ("_%s@%d", mangled_name, param_count);
1807
1808 if (mangled_name != import)
1809 g_free (mangled_name);
1810
1811 mangled_name = mangled_stdcall_name;
1812 }
1813 #endif
1814 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1815 "Probing '%s'.", mangled_name);
1816
1817 error_msg = mono_dl_symbol (module, mangled_name, &addr);
1818
1819 if (addr)
1820 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1821 "Found as '%s'.", mangled_name);
1822 else
1823 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1824 "Could not find '%s' due to '%s'.", mangled_name, error_msg);
1825
1826 g_free (error_msg);
1827 error_msg = NULL;
1828
1829 if (mangled_name != import)
1830 g_free (mangled_name);
1831 }
1832 }
1833 }
1834 }
1835
1836 *error_msg_out = error_msg;
1837 return addr;
1838 }
1839
1840 /*
1841 * LOCKING: assumes the loader lock to be taken.
1842 */
1843 static MonoMethod *
1844 mono_get_method_from_token (MonoImage *image, guint32 token, MonoClass *klass,
1845 MonoGenericContext *context, gboolean *used_context, MonoError *error)
1846 {
1847 MonoMethod *result;
1848 int table = mono_metadata_token_table (token);
1849 int idx = mono_metadata_token_index (token);
1850 MonoTableInfo *tables = image->tables;
1851 MonoGenericContainer *generic_container = NULL, *container = NULL;
1852 const char *sig = NULL;
1853 guint32 cols [MONO_TYPEDEF_SIZE];
1854
1855 error_init (error);
1856
1857 if (image_is_dynamic (image)) {
1858 MonoClass *handle_class;
1859
1860 result = (MonoMethod *)mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context, error);
1861 return_val_if_nok (error, NULL);
1862
1863 // This checks the memberref type as well
1864 if (result && handle_class != mono_defaults.methodhandle_class) {
1865 mono_error_set_bad_image (error, image, "Bad method token 0x%08x on dynamic image", token);
1866 return NULL;
1867 }
1868 return result;
1869 }
1870
1871 if (table != MONO_TABLE_METHOD) {
1872 if (table == MONO_TABLE_METHODSPEC) {
1873 if (used_context) *used_context = TRUE;
1874 return method_from_methodspec (image, context, idx, error);
1875 }
1876 if (table != MONO_TABLE_MEMBERREF) {
1877 mono_error_set_bad_image (error, image, "Bad method token 0x%08x.", token);
1878 return NULL;
1879 }
1880 return method_from_memberref (image, idx, context, used_context, error);
1881 }
1882
1883 if (used_context) *used_context = FALSE;
1884
1885 if (idx > image->tables [MONO_TABLE_METHOD].rows) {
1886 mono_error_set_bad_image (error, image, "Bad method token 0x%08x (out of bounds).", token);
1887 return NULL;
1888 }
1889
1890 if (!klass) {
1891 guint32 type = mono_metadata_typedef_from_method (image, token);
1892 if (!type) {
1893 mono_error_set_bad_image (error, image, "Bad method token 0x%08x (could not find corresponding typedef).", token);
1894 return NULL;
1895 }
1896 klass = mono_class_get_checked (image, MONO_TOKEN_TYPE_DEF | type, error);
1897 if (klass == NULL)
1898 return NULL;
1899 }
1900
1901 mono_metadata_decode_row (&image->tables [MONO_TABLE_METHOD], idx - 1, cols, 6);
1902
1903 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1904 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
1905 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethodPInvoke));
1906 } else {
1907 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethod));
1908 mono_atomic_fetch_add_i32 (&methods_size, sizeof (MonoMethod));
1909 }
1910
1911 mono_atomic_inc_i32 (&mono_stats.method_count);
1912
1913 result->slot = -1;
1914 result->klass = klass;
1915 result->flags = cols [2];
1916 result->iflags = cols [1];
1917 result->token = token;
1918 result->name = mono_metadata_string_heap (image, cols [3]);
1919
1920 /* If a method is abstract and marked as an icall, silently ignore the
1921 * icall attribute so that we don't later emit a warning that the icall
1922 * can't be found.
1923 */
1924 if ((result->flags & METHOD_ATTRIBUTE_ABSTRACT) &&
1925 (result->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
1926 result->iflags &= ~METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
1927
1928 if (!sig) /* already taken from the methodref */
1929 sig = mono_metadata_blob_heap (image, cols [4]);
1930 /* size = */ mono_metadata_decode_blob_size (sig, &sig);
1931
1932 container = mono_class_try_get_generic_container (klass);
1933
1934 /*
1935 * load_generic_params does a binary search so only call it if the method
1936 * is generic.
1937 */
1938 if (*sig & 0x10) {
1939 generic_container = mono_metadata_load_generic_params (image, token, container, result);
1940 }
1941 if (generic_container) {
1942 result->is_generic = TRUE;
1943 /*FIXME put this before the image alloc*/
1944 if (!mono_metadata_load_generic_param_constraints_checked (image, token, generic_container, error))
1945 return NULL;
1946
1947 container = generic_container;
1948 }
1949
1950 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
1951 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
1952 result->string_ctor = 1;
1953 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
1954 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)result;
1955
1956 #ifdef TARGET_WIN32
1957 /* IJW is P/Invoke with a predefined function pointer. */
1958 if (m_image_is_module_handle (image) && (cols [1] & METHOD_IMPL_ATTRIBUTE_NATIVE)) {
1959 piinfo->addr = mono_image_rva_map (image, cols [0]);
1960 g_assert (piinfo->addr);
1961 }
1962 #endif
1963 piinfo->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
1964 /* Native methods can have no map. */
1965 if (piinfo->implmap_idx)
1966 piinfo->piflags = mono_metadata_decode_row_col (&tables [MONO_TABLE_IMPLMAP], piinfo->implmap_idx - 1, MONO_IMPLMAP_FLAGS);
1967 }
1968
1969 if (generic_container)
1970 mono_method_set_generic_container (result, generic_container);
1971
1972 return result;
1973 }
1974
1975 /**
1976 * mono_get_method:
1977 */
1978 MonoMethod *
1979 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
1980 {
1981 ERROR_DECL (error);
1982 MonoMethod *result = mono_get_method_checked (image, token, klass, NULL, error);
1983 mono_error_cleanup (error);
1984 return result;
1985 }
1986
1987 /**
1988 * mono_get_method_full:
1989 */
1990 MonoMethod *
1991 mono_get_method_full (MonoImage *image, guint32 token, MonoClass *klass,
1992 MonoGenericContext *context)
1993 {
1994 ERROR_DECL (error);
1995 MonoMethod *result = mono_get_method_checked (image, token, klass, context, error);
1996 mono_error_cleanup (error);
1997 return result;
1998 }
1999
2000 MonoMethod *
2001 mono_get_method_checked (MonoImage *image, guint32 token, MonoClass *klass, MonoGenericContext *context, MonoError *error)
2002 {
2003 MonoMethod *result = NULL;
2004 gboolean used_context = FALSE;
2005
2006 /* We do everything inside the lock to prevent creation races */
2007
2008 error_init (error);
2009
2010 mono_image_lock (image);
2011
2012 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD) {
2013 if (!image->method_cache)
2014 image->method_cache = g_hash_table_new (NULL, NULL);
2015 result = (MonoMethod *)g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
2016 } else if (!image_is_dynamic (image)) {
2017 if (!image->methodref_cache)
2018 image->methodref_cache = g_hash_table_new (NULL, NULL);
2019 result = (MonoMethod *)g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
2020 }
2021 mono_image_unlock (image);
2022
2023 if (result)
2024 return result;
2025
2026
2027 result = mono_get_method_from_token (image, token, klass, context, &used_context, error);
2028 if (!result)
2029 return NULL;
2030
2031 mono_image_lock (image);
2032 if (!used_context && !result->is_inflated) {
2033 MonoMethod *result2 = NULL;
2034
2035 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
2036 result2 = (MonoMethod *)g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
2037 else if (!image_is_dynamic (image))
2038 result2 = (MonoMethod *)g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
2039
2040 if (result2) {
2041 mono_image_unlock (image);
2042 return result2;
2043 }
2044
2045 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
2046 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)), result);
2047 else if (!image_is_dynamic (image))
2048 g_hash_table_insert (image->methodref_cache, GINT_TO_POINTER (token), result);
2049 }
2050
2051 mono_image_unlock (image);
2052
2053 return result;
2054 }
2055
2056 static MonoMethod*
2057 get_method_constrained (MonoImage *image, MonoMethod *method, MonoClass *constrained_class, MonoGenericContext *context, MonoError *error)
2058 {
2059 MonoClass *base_class = method->klass;
2060
2061 error_init (error);
2062
2063 if (!mono_class_is_assignable_from_internal (base_class, constrained_class)) {
2064 char *base_class_name = mono_type_get_full_name (base_class);
2065 char *constrained_class_name = mono_type_get_full_name (constrained_class);
2066 mono_error_set_invalid_operation (error, "constrained call: %s is not assignable from %s", base_class_name, constrained_class_name);
2067 g_free (base_class_name);
2068 g_free (constrained_class_name);
2069 return NULL;
2070 }
2071
2072 /* If the constraining class is actually an interface, we don't learn
2073 * anything new by constraining.
2074 */
2075 if (MONO_CLASS_IS_INTERFACE_INTERNAL (constrained_class))
2076 return method;
2077
2078 mono_class_setup_vtable (base_class);
2079 if (mono_class_has_failure (base_class)) {
2080 mono_error_set_for_class_failure (error, base_class);
2081 return NULL;
2082 }
2083
2084 MonoGenericContext inflated_method_ctx;
2085 memset (&inflated_method_ctx, 0, sizeof (inflated_method_ctx));
2086 inflated_method_ctx.class_inst = NULL;
2087 inflated_method_ctx.method_inst = NULL;
2088 gboolean inflated_generic_method = FALSE;
2089 if (method->is_inflated) {
2090 MonoGenericContext *method_ctx = mono_method_get_context (method);
2091 /* If method is an instantiation of a generic method definition, ie
2092 * class H<T> { void M<U> (...) { ... } }
2093 * and method is H<C>.M<D>
2094 * we will get at the end a refined HSubclass<...>.M<U> and we will need to re-instantiate it with D.
2095 * to get HSubclass<...>.M<D>
2096 *
2097 */
2098 if (method_ctx->method_inst != NULL) {
2099 inflated_generic_method = TRUE;
2100 inflated_method_ctx.method_inst = method_ctx->method_inst;
2101 }
2102 }
2103 int vtable_slot = 0;
2104 if (!MONO_CLASS_IS_INTERFACE_INTERNAL (base_class)) {
2105 /*if the base class isn't an interface and the method isn't
2106 * virtual, there's nothing to do, we're already on the method
2107 * we want to call. */
2108 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) == 0)
2109 return method;
2110 /* if this isn't an interface method, get the vtable slot and
2111 * find the corresponding method in the constrained class,
2112 * which is a subclass of the base class. */
2113 vtable_slot = mono_method_get_vtable_index (method);
2114
2115 mono_class_setup_vtable (constrained_class);
2116 if (mono_class_has_failure (constrained_class)) {
2117 mono_error_set_for_class_failure (error, constrained_class);
2118 return NULL;
2119 }
2120 } else {
2121 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) == 0)
2122 return method;
2123 mono_class_setup_vtable (constrained_class);
2124 if (mono_class_has_failure (constrained_class)) {
2125 mono_error_set_for_class_failure (error, constrained_class);
2126 return NULL;
2127 }
2128
2129 /* Get the slot of the method in the interface. Then get the
2130 * interface base in constrained_class */
2131 int itf_slot = mono_method_get_vtable_index (method);
2132 g_assert (itf_slot >= 0);
2133 gboolean variant = FALSE;
2134 int itf_base = mono_class_interface_offset_with_variance (constrained_class, base_class, &variant);
2135 vtable_slot = itf_slot + itf_base;
2136 }
2137 g_assert (vtable_slot >= 0);
2138
2139 MonoMethod *res = mono_class_get_vtable_entry (constrained_class, vtable_slot);
2140 if (res == NULL && mono_class_is_abstract (constrained_class) ) {
2141 /* Constraining class is abstract, there may not be a refined method. */
2142 return method;
2143 }
2144 g_assert (res != NULL);
2145 if (inflated_generic_method) {
2146 g_assert (res->is_generic || res->is_inflated);
2147 res = mono_class_inflate_generic_method_checked (res, &inflated_method_ctx, error);
2148 return_val_if_nok (error, NULL);
2149 }
2150 return res;
2151 }
2152
2153 MonoMethod *
2154 mono_get_method_constrained_with_method (MonoImage *image, MonoMethod *method, MonoClass *constrained_class,
2155 MonoGenericContext *context, MonoError *error)
2156 {
2157 g_assert (method);
2158
2159 return get_method_constrained (image, method, constrained_class, context, error);
2160 }
2161
2162 /**
2163 * mono_get_method_constrained:
2164 * This is used when JITing the <code>constrained.</code> opcode.
2165 * \returns The contrained method, which has been inflated
2166 * as the function return value; and the original CIL-stream method as
2167 * declared in \p cil_method. The latter is used for verification.
2168 */
2169 MonoMethod *
2170 mono_get_method_constrained (MonoImage *image, guint32 token, MonoClass *constrained_class,
2171 MonoGenericContext *context, MonoMethod **cil_method)
2172 {
2173 ERROR_DECL (error);
2174 MonoMethod *result = mono_get_method_constrained_checked (image, token, constrained_class, context, cil_method, error);
2175 mono_error_cleanup (error);
2176 return result;
2177 }
2178
2179 MonoMethod *
2180 mono_get_method_constrained_checked (MonoImage *image, guint32 token, MonoClass *constrained_class, MonoGenericContext *context, MonoMethod **cil_method, MonoError *error)
2181 {
2182 error_init (error);
2183
2184 *cil_method = mono_get_method_checked (image, token, NULL, context, error);
2185 if (!*cil_method)
2186 return NULL;
2187
2188 return get_method_constrained (image, *cil_method, constrained_class, context, error);
2189 }
2190
2191 /**
2192 * mono_free_method:
2193 */
2194 void
2195 mono_free_method (MonoMethod *method)
2196 {
2197 if (!method)
2198 return;
2199
2200 MONO_PROFILER_RAISE (method_free, (method));
2201
2202 /* FIXME: This hack will go away when the profiler will support freeing methods */
2203 if (G_UNLIKELY (mono_profiler_installed ()))
2204 return;
2205
2206 if (method->signature) {
2207 /*
2208 * FIXME: This causes crashes because the types inside signatures and
2209 * locals are shared.
2210 */
2211 /* mono_metadata_free_method_signature (method->signature); */
2212 /* g_free (method->signature); */
2213 }
2214
2215 if (method_is_dynamic (method)) {
2216 MonoMethodWrapper *mw = (MonoMethodWrapper*)method;
2217 int i;
2218
2219 mono_marshal_free_dynamic_wrappers (method);
2220
2221 mono_image_property_remove (m_class_get_image (method->klass), method);
2222
2223 g_free ((char*)method->name);
2224 if (mw->header) {
2225 g_free ((char*)mw->header->code);
2226 for (i = 0; i < mw->header->num_locals; ++i)
2227 g_free (mw->header->locals [i]);
2228 g_free (mw->header->clauses);
2229 g_free (mw->header);
2230 }
2231 g_free (mw->method_data);
2232 g_free (method->signature);
2233 g_free (method);
2234 }
2235 }
2236
2237 /**
2238 * mono_method_get_param_names:
2239 */
2240 void
2241 mono_method_get_param_names (MonoMethod *method, const char **names)
2242 {
2243 int i, lastp;
2244 MonoClass *klass;
2245 MonoTableInfo *methodt;
2246 MonoTableInfo *paramt;
2247 MonoMethodSignature *signature;
2248 guint32 idx;
2249
2250 if (method->is_inflated)
2251 method = ((MonoMethodInflated *) method)->declaring;
2252
2253 signature = mono_method_signature_internal (method);
2254 /*FIXME this check is somewhat redundant since the caller usally will have to get the signature to figure out the
2255 number of arguments and allocate a properly sized array. */
2256 if (signature == NULL)
2257 return;
2258
2259 if (!signature->param_count)
2260 return;
2261
2262 for (i = 0; i < signature->param_count; ++i)
2263 names [i] = "";
2264
2265 klass = method->klass;
2266 if (m_class_get_rank (klass))
2267 return;
2268
2269 mono_class_init_internal (klass);
2270
2271 MonoImage *klass_image = m_class_get_image (klass);
2272 if (image_is_dynamic (klass_image)) {
2273 MonoReflectionMethodAux *method_aux =
2274 (MonoReflectionMethodAux *)g_hash_table_lookup (
2275 ((MonoDynamicImage*)m_class_get_image (method->klass))->method_aux_hash, method);
2276 if (method_aux && method_aux->param_names) {
2277 for (i = 0; i < mono_method_signature_internal (method)->param_count; ++i)
2278 if (method_aux->param_names [i + 1])
2279 names [i] = method_aux->param_names [i + 1];
2280 }
2281 return;
2282 }
2283
2284 if (method->wrapper_type) {
2285 char **pnames = NULL;
2286
2287 mono_image_lock (klass_image);
2288 if (klass_image->wrapper_param_names)
2289 pnames = (char **)g_hash_table_lookup (klass_image->wrapper_param_names, method);
2290 mono_image_unlock (klass_image);
2291
2292 if (pnames) {
2293 for (i = 0; i < signature->param_count; ++i)
2294 names [i] = pnames [i];
2295 }
2296 return;
2297 }
2298
2299 methodt = &klass_image->tables [MONO_TABLE_METHOD];
2300 paramt = &klass_image->tables [MONO_TABLE_PARAM];
2301 idx = mono_method_get_index (method);
2302 if (idx > 0) {
2303 guint32 cols [MONO_PARAM_SIZE];
2304 guint param_index;
2305
2306 param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2307
2308 if (idx < methodt->rows)
2309 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
2310 else
2311 lastp = paramt->rows + 1;
2312 for (i = param_index; i < lastp; ++i) {
2313 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
2314 if (cols [MONO_PARAM_SEQUENCE] && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) /* skip return param spec and bounds check*/
2315 names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass_image, cols [MONO_PARAM_NAME]);
2316 }
2317 }
2318 }
2319
2320 /**
2321 * mono_method_get_param_token:
2322 */
2323 guint32
2324 mono_method_get_param_token (MonoMethod *method, int index)
2325 {
2326 MonoClass *klass = method->klass;
2327 MonoTableInfo *methodt;
2328 guint32 idx;
2329
2330 mono_class_init_internal (klass);
2331
2332 MonoImage *klass_image = m_class_get_image (klass);
2333 g_assert (!image_is_dynamic (klass_image));
2334
2335 methodt = &klass_image->tables [MONO_TABLE_METHOD];
2336 idx = mono_method_get_index (method);
2337 if (idx > 0) {
2338 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2339
2340 if (index == -1)
2341 /* Return value */
2342 return mono_metadata_make_token (MONO_TABLE_PARAM, 0);
2343 else
2344 return mono_metadata_make_token (MONO_TABLE_PARAM, param_index + index);
2345 }
2346
2347 return 0;
2348 }
2349
2350 /**
2351 * mono_method_get_marshal_info:
2352 */
2353 void
2354 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
2355 {
2356 int i, lastp;
2357 MonoClass *klass = method->klass;
2358 MonoTableInfo *methodt;
2359 MonoTableInfo *paramt;
2360 MonoMethodSignature *signature;
2361 guint32 idx;
2362
2363 signature = mono_method_signature_internal (method);
2364 g_assert (signature); /*FIXME there is no way to signal error from this function*/
2365
2366 for (i = 0; i < signature->param_count + 1; ++i)
2367 mspecs [i] = NULL;
2368
2369 if (image_is_dynamic (m_class_get_image (method->klass))) {
2370 MonoReflectionMethodAux *method_aux =
2371 (MonoReflectionMethodAux *)g_hash_table_lookup (
2372 ((MonoDynamicImage*)m_class_get_image (method->klass))->method_aux_hash, method);
2373 if (method_aux && method_aux->param_marshall) {
2374 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
2375 for (i = 0; i < signature->param_count + 1; ++i)
2376 if (dyn_specs [i]) {
2377 mspecs [i] = g_new0 (MonoMarshalSpec, 1);
2378 memcpy (mspecs [i], dyn_specs [i], sizeof (MonoMarshalSpec));
2379 mspecs [i]->data.custom_data.custom_name = g_strdup (dyn_specs [i]->data.custom_data.custom_name);
2380 mspecs [i]->data.custom_data.cookie = g_strdup (dyn_specs [i]->data.custom_data.cookie);
2381 }
2382 }
2383 return;
2384 }
2385
2386 /* dynamic method added to non-dynamic image */
2387 if (method->dynamic)
2388 return;
2389
2390 mono_class_init_internal (klass);
2391
2392 MonoImage *klass_image = m_class_get_image (klass);
2393 methodt = &klass_image->tables [MONO_TABLE_METHOD];
2394 paramt = &klass_image->tables [MONO_TABLE_PARAM];
2395 idx = mono_method_get_index (method);
2396 if (idx > 0) {
2397 guint32 cols [MONO_PARAM_SIZE];
2398 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2399
2400 if (idx < methodt->rows)
2401 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
2402 else
2403 lastp = paramt->rows + 1;
2404
2405 for (i = param_index; i < lastp; ++i) {
2406 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
2407
2408 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) {
2409 const char *tp;
2410 tp = mono_metadata_get_marshal_info (klass_image, i - 1, FALSE);
2411 g_assert (tp);
2412 mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass_image, tp);
2413 }
2414 }
2415
2416 return;
2417 }
2418 }
2419
2420 /**
2421 * mono_method_has_marshal_info:
2422 */
2423 gboolean
2424 mono_method_has_marshal_info (MonoMethod *method)
2425 {
2426 int i, lastp;
2427 MonoClass *klass = method->klass;
2428 MonoTableInfo *methodt;
2429 MonoTableInfo *paramt;
2430 guint32 idx;
2431
2432 if (image_is_dynamic (m_class_get_image (method->klass))) {
2433 MonoReflectionMethodAux *method_aux =
2434 (MonoReflectionMethodAux *)g_hash_table_lookup (
2435 ((MonoDynamicImage*)m_class_get_image (method->klass))->method_aux_hash, method);
2436 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
2437 if (dyn_specs) {
2438 for (i = 0; i < mono_method_signature_internal (method)->param_count + 1; ++i)
2439 if (dyn_specs [i])
2440 return TRUE;
2441 }
2442 return FALSE;
2443 }
2444
2445 mono_class_init_internal (klass);
2446
2447 methodt = &m_class_get_image (klass)->tables [MONO_TABLE_METHOD];
2448 paramt = &m_class_get_image (klass)->tables [MONO_TABLE_PARAM];
2449 idx = mono_method_get_index (method);
2450 if (idx > 0) {
2451 guint32 cols [MONO_PARAM_SIZE];
2452 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
2453
2454 if (idx + 1 < methodt->rows)
2455 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
2456 else
2457 lastp = paramt->rows + 1;
2458
2459 for (i = param_index; i < lastp; ++i) {
2460 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
2461
2462 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL)
2463 return TRUE;
2464 }
2465 return FALSE;
2466 }
2467 return FALSE;
2468 }
2469
2470 gpointer
2471 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
2472 {
2473 void **data;
2474 g_assert (method != NULL);
2475 g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
2476
2477 data = (void **)((MonoMethodWrapper *)method)->method_data;
2478 g_assert (data != NULL);
2479 g_assert (id <= GPOINTER_TO_UINT (*data));
2480 return data [id];
2481 }
2482
2483 typedef struct {
2484 MonoStackWalk func;
2485 gpointer user_data;
2486 } StackWalkUserData;
2487
2488 static gboolean
2489 stack_walk_adapter (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
2490 {
2491 StackWalkUserData *d = (StackWalkUserData *)data;
2492
2493 switch (frame->type) {
2494 case FRAME_TYPE_DEBUGGER_INVOKE:
2495 case FRAME_TYPE_MANAGED_TO_NATIVE:
2496 case FRAME_TYPE_TRAMPOLINE:
2497 case FRAME_TYPE_INTERP_TO_MANAGED:
2498 case FRAME_TYPE_INTERP_TO_MANAGED_WITH_CTX:
2499 return FALSE;
2500 case FRAME_TYPE_MANAGED:
2501 case FRAME_TYPE_INTERP:
2502 g_assert (frame->ji);
2503 return d->func (frame->actual_method, frame->native_offset, frame->il_offset, frame->managed, d->user_data);
2504 break;
2505 default:
2506 g_assert_not_reached ();
2507 return FALSE;
2508 }
2509 }
2510
2511 void
2512 mono_stack_walk (MonoStackWalk func, gpointer user_data)
2513 {
2514 StackWalkUserData ud = { func, user_data };
2515 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (stack_walk_adapter, NULL, MONO_UNWIND_LOOKUP_ALL, &ud);
2516 }
2517
2518 /**
2519 * mono_stack_walk_no_il:
2520 */
2521 void
2522 mono_stack_walk_no_il (MonoStackWalk func, gpointer user_data)
2523 {
2524 StackWalkUserData ud = { func, user_data };
2525 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (stack_walk_adapter, NULL, MONO_UNWIND_DEFAULT, &ud);
2526 }
2527
2528 typedef struct {
2529 MonoStackWalkAsyncSafe func;
2530 gpointer user_data;
2531 } AsyncStackWalkUserData;
2532
2533
2534 static gboolean
2535 async_stack_walk_adapter (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
2536 {
2537 AsyncStackWalkUserData *d = (AsyncStackWalkUserData *)data;
2538
2539 switch (frame->type) {
2540 case FRAME_TYPE_DEBUGGER_INVOKE:
2541 case FRAME_TYPE_MANAGED_TO_NATIVE:
2542 case FRAME_TYPE_TRAMPOLINE:
2543 case FRAME_TYPE_INTERP_TO_MANAGED:
2544 case FRAME_TYPE_INTERP_TO_MANAGED_WITH_CTX:
2545 return FALSE;
2546 case FRAME_TYPE_MANAGED:
2547 case FRAME_TYPE_INTERP:
2548 if (!frame->ji)
2549 return FALSE;
2550
2551 MonoMethod *method;
2552 method = frame->ji->async ? NULL : frame->actual_method;
2553
2554 return d->func (method, frame->domain, frame->ji->code_start, frame->native_offset, d->user_data);
2555 default:
2556 g_assert_not_reached ();
2557 return FALSE;
2558 }
2559 }
2560
2561
2562 /**
2563 * mono_stack_walk_async_safe:
2564 * Async safe version callable from signal handlers.
2565 */
2566 void
2567 mono_stack_walk_async_safe (MonoStackWalkAsyncSafe func, void *initial_sig_context, void *user_data)
2568 {
2569 MonoContext ctx;
2570 AsyncStackWalkUserData ud = { func, user_data };
2571
2572 mono_sigctx_to_monoctx (initial_sig_context, &ctx);
2573 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (async_stack_walk_adapter, &ctx, MONO_UNWIND_SIGNAL_SAFE, &ud);
2574 }
2575
2576 static gboolean
2577 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2578 {
2579 MonoMethod **dest = (MonoMethod **)data;
2580 *dest = m;
2581 /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
2582
2583 return managed;
2584 }
2585
2586 /**
2587 * mono_method_get_last_managed:
2588 */
2589 MonoMethod*
2590 mono_method_get_last_managed (void)
2591 {
2592 MonoMethod *m = NULL;
2593 mono_stack_walk_no_il (last_managed, &m);
2594 return m;
2595 }
2596
2597 static gboolean loader_lock_track_ownership = FALSE;
2598
2599 /**
2600 * mono_loader_lock:
2601 *
2602 * See \c docs/thread-safety.txt for the locking strategy.
2603 */
2604 void
2605 mono_loader_lock (void)
2606 {
2607 mono_locks_coop_acquire (&loader_mutex, LoaderLock);
2608 if (G_UNLIKELY (loader_lock_track_ownership)) {
2609 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));
2610 }
2611 }
2612
2613 /**
2614 * mono_loader_unlock:
2615 */
2616 void
2617 mono_loader_unlock (void)
2618 {
2619 mono_locks_coop_release (&loader_mutex, LoaderLock);
2620 if (G_UNLIKELY (loader_lock_track_ownership)) {
2621 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));
2622 }
2623 }
2624
2625 /*
2626 * mono_loader_lock_track_ownership:
2627 *
2628 * Set whenever the runtime should track ownership of the loader lock. If set to TRUE,
2629 * the mono_loader_lock_is_owned_by_self () can be called to query whenever the current
2630 * thread owns the loader lock.
2631 */
2632 void
2633 mono_loader_lock_track_ownership (gboolean track)
2634 {
2635 loader_lock_track_ownership = track;
2636 }
2637
2638 /*
2639 * mono_loader_lock_is_owned_by_self:
2640 *
2641 * Return whenever the current thread owns the loader lock.
2642 * This is useful to avoid blocking operations while holding the loader lock.
2643 */
2644 gboolean
2645 mono_loader_lock_is_owned_by_self (void)
2646 {
2647 g_assert (loader_lock_track_ownership);
2648
2649 return GPOINTER_TO_UINT (mono_native_tls_get_value (loader_lock_nest_id)) > 0;
2650 }
2651
2652 /*
2653 * mono_loader_lock_if_inited:
2654 *
2655 * Acquire the loader lock if it has been initialized, no-op otherwise. This can
2656 * be used in runtime initialization code which can be executed before mono_loader_init ().
2657 */
2658 void
2659 mono_loader_lock_if_inited (void)
2660 {
2661 if (loader_lock_inited)
2662 mono_loader_lock ();
2663 }
2664
2665 void
2666 mono_loader_unlock_if_inited (void)
2667 {
2668 if (loader_lock_inited)
2669 mono_loader_unlock ();
2670 }
2671
2672 /**
2673 * mono_method_signature_checked_slow:
2674 *
2675 * Return the signature of the method M. On failure, returns NULL, and ERR is set.
2676 * Call mono_method_signature_checked instead.
2677 */
2678 MonoMethodSignature*
2679 mono_method_signature_checked_slow (MonoMethod *m, MonoError *error)
2680 {
2681 int idx;
2682 MonoImage* img;
2683 const char *sig;
2684 gboolean can_cache_signature;
2685 MonoGenericContainer *container;
2686 MonoMethodSignature *signature = NULL, *sig2;
2687 guint32 sig_offset;
2688
2689 /* We need memory barriers below because of the double-checked locking pattern */
2690
2691 error_init (error);
2692
2693 if (m->signature)
2694 return m->signature;
2695
2696 img = m_class_get_image (m->klass);
2697
2698 if (m->is_inflated) {
2699 MonoMethodInflated *imethod = (MonoMethodInflated *) m;
2700 /* the lock is recursive */
2701 signature = mono_method_signature_internal (imethod->declaring);
2702 signature = inflate_generic_signature_checked (m_class_get_image (imethod->declaring->klass), signature, mono_method_get_context (m), error);
2703 if (!is_ok (error))
2704 return NULL;
2705
2706 mono_atomic_fetch_add_i32 (&inflated_signatures_size, mono_metadata_signature_size (signature));
2707
2708 mono_image_lock (img);
2709
2710 mono_memory_barrier ();
2711 if (!m->signature)
2712 m->signature = signature;
2713
2714 mono_image_unlock (img);
2715
2716 return m->signature;
2717 }
2718
2719 g_assert (mono_metadata_token_table (m->token) == MONO_TABLE_METHOD);
2720 idx = mono_metadata_token_index (m->token);
2721
2722 sig = mono_metadata_blob_heap (img, sig_offset = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_SIGNATURE));
2723
2724 g_assert (!mono_class_is_ginst (m->klass));
2725 container = mono_method_get_generic_container (m);
2726 if (!container)
2727 container = mono_class_try_get_generic_container (m->klass);
2728
2729 /* Generic signatures depend on the container so they cannot be cached */
2730 /* icall/pinvoke signatures cannot be cached cause we modify them below */
2731 can_cache_signature = !(m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) && !(m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) && !container;
2732
2733 /* If the method has parameter attributes, that can modify the signature */
2734 if (mono_metadata_method_has_param_attrs (img, idx))
2735 can_cache_signature = FALSE;
2736
2737 if (can_cache_signature) {
2738 mono_image_lock (img);
2739 signature = (MonoMethodSignature *)g_hash_table_lookup (img->method_signatures, sig);
2740 mono_image_unlock (img);
2741 }
2742
2743 if (!signature) {
2744 const char *sig_body;
2745 /*TODO we should cache the failure result somewhere*/
2746 if (!mono_verifier_verify_method_signature (img, sig_offset, error))
2747 return NULL;
2748
2749 /* size = */ mono_metadata_decode_blob_size (sig, &sig_body);
2750
2751 signature = mono_metadata_parse_method_signature_full (img, container, idx, sig_body, NULL, error);
2752 if (!signature)
2753 return NULL;
2754
2755 if (can_cache_signature) {
2756 mono_image_lock (img);
2757 sig2 = (MonoMethodSignature *)g_hash_table_lookup (img->method_signatures, sig);
2758 if (!sig2)
2759 g_hash_table_insert (img->method_signatures, (gpointer)sig, signature);
2760 mono_image_unlock (img);
2761 }
2762
2763 mono_atomic_fetch_add_i32 (&signatures_size, mono_metadata_signature_size (signature));
2764 }
2765
2766 /* Verify metadata consistency */
2767 if (signature->generic_param_count) {
2768 if (!container || !container->is_method) {
2769 mono_error_set_method_missing (error, m->klass, m->name, signature, "Signature claims method has generic parameters, but generic_params table says it doesn't for method 0x%08x from image %s", idx, img->name);
2770 return NULL;
2771 }
2772 if (container->type_argc != signature->generic_param_count) {
2773 mono_error_set_method_missing (error, m->klass, m->name, signature, "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);
2774 return NULL;
2775 }
2776 } else if (container && container->is_method && container->type_argc) {
2777 mono_error_set_method_missing (error, m->klass, m->name, signature, "generic_params table claims method has generic parameters, but signature says it doesn't for method 0x%08x from image %s", idx, img->name);
2778 return NULL;
2779 }
2780 if (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
2781 signature->pinvoke = 1;
2782 #ifdef TARGET_WIN32
2783 /*
2784 * On Windows the default pinvoke calling convention is STDCALL but
2785 * we need CDECL since this is actually an icall.
2786 */
2787 signature->call_convention = MONO_CALL_C;
2788 #endif
2789 } else if (m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
2790 MonoCallConvention conv = (MonoCallConvention)0;
2791 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)m;
2792 signature->pinvoke = 1;
2793
2794 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CALL_CONV_MASK) {
2795 case 0: /* no call conv, so using default */
2796 case PINVOKE_ATTRIBUTE_CALL_CONV_WINAPI:
2797 conv = MONO_CALL_DEFAULT;
2798 break;
2799 case PINVOKE_ATTRIBUTE_CALL_CONV_CDECL:
2800 conv = MONO_CALL_C;
2801 break;
2802 case PINVOKE_ATTRIBUTE_CALL_CONV_STDCALL:
2803 conv = MONO_CALL_STDCALL;
2804 break;
2805 case PINVOKE_ATTRIBUTE_CALL_CONV_THISCALL:
2806 conv = MONO_CALL_THISCALL;
2807 break;
2808 case PINVOKE_ATTRIBUTE_CALL_CONV_FASTCALL:
2809 conv = MONO_CALL_FASTCALL;
2810 break;
2811 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERIC:
2812 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERICINST:
2813 default: {
2814 mono_error_set_method_missing (error, m->klass, m->name, signature, "Unsupported calling convention : 0x%04x for method 0x%08x from image %s", piinfo->piflags, idx, img->name);
2815 }
2816 return NULL;
2817 }
2818 signature->call_convention = conv;
2819 }
2820
2821 mono_image_lock (img);
2822
2823 mono_memory_barrier ();
2824 if (!m->signature)
2825 m->signature = signature;
2826
2827 mono_image_unlock (img);
2828
2829 return m->signature;
2830 }
2831
2832 /**
2833 * mono_method_signature_internal_slow:
2834 * \returns the signature of the method \p m. On failure, returns NULL.
2835 * Call mono_method_signature_internal instead.
2836 */
2837 MonoMethodSignature*
2838 mono_method_signature_internal_slow (MonoMethod *m)
2839 {
2840 ERROR_DECL (error);
2841 MonoMethodSignature *sig = mono_method_signature_checked (m, error);
2842 if (sig)
2843 return sig;
2844 char *type_name = mono_type_get_full_name (m->klass);
2845 g_warning ("Could not load signature of %s:%s due to: %s", type_name, m->name, mono_error_get_message (error));
2846 g_free (type_name);
2847 mono_error_cleanup (error);
2848 return NULL;
2849 }
2850
2851 /**
2852 * mono_method_signature:
2853 * \returns the signature of the method \p m. On failure, returns NULL.
2854 */
2855 MonoMethodSignature*
2856 mono_method_signature (MonoMethod *m)
2857 {
2858 MonoMethodSignature *sig;
2859 MONO_ENTER_GC_UNSAFE;
2860 sig = mono_method_signature_internal (m);
2861 MONO_EXIT_GC_UNSAFE;
2862 return sig;
2863 }
2864
2865 /**
2866 * mono_method_get_name:
2867 */
2868 const char*
2869 mono_method_get_name (MonoMethod *method)
2870 {
2871 return method->name;
2872 }
2873
2874 /**
2875 * mono_method_get_class:
2876 */
2877 MonoClass*
2878 mono_method_get_class (MonoMethod *method)
2879 {
2880 return method->klass;
2881 }
2882
2883 /**
2884 * mono_method_get_token:
2885 */
2886 guint32
2887 mono_method_get_token (MonoMethod *method)
2888 {
2889 return method->token;
2890 }
2891
2892 gboolean
2893 mono_method_has_no_body (MonoMethod *method)
2894 {
2895 return ((method->flags & METHOD_ATTRIBUTE_ABSTRACT) ||
2896 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
2897 (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
2898 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL));
2899 }
2900
2901 // FIXME Replace all internal callers of mono_method_get_header_checked with
2902 // mono_method_get_header_internal; the difference is in error initialization.
2903 MonoMethodHeader*
2904 mono_method_get_header_internal (MonoMethod *method, MonoError *error)
2905 {
2906 int idx;
2907 guint32 rva;
2908 MonoImage* img;
2909 gpointer loc;
2910 MonoGenericContainer *container;
2911
2912 error_init (error);
2913 img = m_class_get_image (method->klass);
2914
2915 // FIXME: for internal callers maybe it makes sense to do this check at the call site, not
2916 // here?
2917 if (mono_method_has_no_body (method)) {
2918 if (method->is_reabstracted == 1)
2919 mono_error_set_generic_error (error, "System", "EntryPointNotFoundException", "%s", method->name);
2920 else
2921 mono_error_set_bad_image (error, img, "Method has no body");
2922 return NULL;
2923 }
2924
2925 if (method->is_inflated) {
2926 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
2927 MonoMethodHeader *header, *iheader;
2928
2929 header = mono_method_get_header_checked (imethod->declaring, error);
2930 if (!header)
2931 return NULL;
2932
2933 iheader = inflate_generic_header (header, mono_method_get_context (method), error);
2934 mono_metadata_free_mh (header);
2935 if (!iheader) {
2936 return NULL;
2937 }
2938
2939 return iheader;
2940 }
2941
2942 if (method->wrapper_type != MONO_WRAPPER_NONE || method->sre_method) {
2943 MonoMethodWrapper *mw = (MonoMethodWrapper *)method;
2944 g_assert (mw->header);
2945 return mw->header;
2946 }
2947
2948 /*
2949 * We don't need locks here: the new header is allocated from malloc memory
2950 * and is not stored anywhere in the runtime, the user needs to free it.
2951 */
2952 g_assert (mono_metadata_token_table (method->token) == MONO_TABLE_METHOD);
2953 idx = mono_metadata_token_index (method->token);
2954 rva = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_RVA);
2955
2956 if (!mono_verifier_verify_method_header (img, rva, error))
2957 return NULL;
2958
2959 loc = mono_image_rva_map (img, rva);
2960 if (!loc) {
2961 mono_error_set_bad_image (error, img, "Method has zero rva");
2962 return NULL;
2963 }
2964
2965 /*
2966 * When parsing the types of local variables, we must pass any container available
2967 * to ensure that both VAR and MVAR will get the right owner.
2968 */
2969 container = mono_method_get_generic_container (method);
2970 if (!container)
2971 container = mono_class_try_get_generic_container (method->klass);
2972 return mono_metadata_parse_mh_full (img, container, (const char *)loc, error);
2973 }
2974
2975 MonoMethodHeader*
2976 mono_method_get_header_checked (MonoMethod *method, MonoError *error)
2977 // Public function that must initialize MonoError for compatibility.
2978 {
2979 MONO_API_ERROR_INIT (error);
2980 return mono_method_get_header_internal (method, error);
2981 }
2982 /**
2983 * mono_method_get_header:
2984 */
2985 MonoMethodHeader*
2986 mono_method_get_header (MonoMethod *method)
2987 {
2988 ERROR_DECL (error);
2989 MonoMethodHeader *header = mono_method_get_header_checked (method, error);
2990 mono_error_cleanup (error);
2991 return header;
2992 }
2993
2994
2995 /**
2996 * mono_method_get_flags:
2997 */
2998 guint32
2999 mono_method_get_flags (MonoMethod *method, guint32 *iflags)
3000 {
3001 if (iflags)
3002 *iflags = method->iflags;
3003 return method->flags;
3004 }
3005
3006 /**
3007 * mono_method_get_index:
3008 * Find the method index in the metadata \c MethodDef table.
3009 */
3010 guint32
3011 mono_method_get_index (MonoMethod *method)
3012 {
3013 MonoClass *klass = method->klass;
3014 int i;
3015
3016 if (m_class_get_rank (klass))
3017 /* constructed array methods are not in the MethodDef table */
3018 return 0;
3019
3020 if (method->token)
3021 return mono_metadata_token_index (method->token);
3022
3023 mono_class_setup_methods (klass);
3024 if (mono_class_has_failure (klass))
3025 return 0;
3026 int first_idx = mono_class_get_first_method_idx (klass);
3027 int mcount = mono_class_get_method_count (klass);
3028 MonoMethod **klass_methods = m_class_get_methods (klass);
3029 for (i = 0; i < mcount; ++i) {
3030 if (method == klass_methods [i]) {
3031 if (m_class_get_image (klass)->uncompressed_metadata)
3032 return mono_metadata_translate_token_index (m_class_get_image (klass), MONO_TABLE_METHOD, first_idx + i + 1);
3033 else
3034 return first_idx + i + 1;
3035 }
3036 }
3037 return 0;
3038 }
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