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2010-04-13 Rodrigo Kumpera <rkumpera@novell.com>
[mono.git] / mono / metadata / loader.c
blob368e1006a8f8cd0fccb5a044add3413c37fcbb03
1 /*
2 * loader.c: Image Loader
3 *
4 * Authors:
5 * Paolo Molaro (lupus@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
8 *
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 *
12 * This file is used by the interpreter and the JIT engine to locate
13 * assemblies. Used to load AssemblyRef and later to resolve various
14 * kinds of `Refs'.
15 *
16 * TODO:
17 * This should keep track of the assembly versions that we are loading.
18 *
19 */
20 #include <config.h>
21 #include <glib.h>
22 #include <stdlib.h>
23 #include <stdio.h>
24 #include <string.h>
25 #include <mono/metadata/metadata.h>
26 #include <mono/metadata/image.h>
27 #include <mono/metadata/assembly.h>
28 #include <mono/metadata/tokentype.h>
29 #include <mono/metadata/tabledefs.h>
30 #include <mono/metadata/metadata-internals.h>
31 #include <mono/metadata/loader.h>
32 #include <mono/metadata/class-internals.h>
33 #include <mono/metadata/debug-helpers.h>
34 #include <mono/metadata/reflection.h>
35 #include <mono/metadata/profiler.h>
36 #include <mono/metadata/profiler-private.h>
37 #include <mono/metadata/exception.h>
38 #include <mono/metadata/marshal.h>
39 #include <mono/metadata/lock-tracer.h>
40 #include <mono/metadata/verify-internals.h>
41 #include <mono/utils/mono-logger-internal.h>
42 #include <mono/utils/mono-dl.h>
43 #include <mono/utils/mono-membar.h>
44 #include <mono/utils/mono-counters.h>
45 #include <mono/utils/mono-error-internals.h>
46
47 MonoDefaults mono_defaults;
48
49 /*
50 * This lock protects the hash tables inside MonoImage used by the metadata
51 * loading functions in class.c and loader.c.
52 *
53 * See domain-internals.h for locking policy in combination with the
54 * domain lock.
55 */
56 static CRITICAL_SECTION loader_mutex;
57
58 /* Statistics */
59 static guint32 inflated_signatures_size;
60 static guint32 memberref_sig_cache_size;
61
62 /*
63 * This TLS variable contains the last type load error encountered by the loader.
64 */
65 guint32 loader_error_thread_id;
66
67 /*
68 * This TLS variable holds how many times the current thread has acquired the loader
69 * lock.
70 */
71 guint32 loader_lock_nest_id;
72
73 void
74 mono_loader_init ()
75 {
76 static gboolean inited;
77
78 if (!inited) {
79 InitializeCriticalSection (&loader_mutex);
80
81 loader_error_thread_id = TlsAlloc ();
82 loader_lock_nest_id = TlsAlloc ();
83
84 mono_counters_register ("Inflated signatures size",
85 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &inflated_signatures_size);
86 mono_counters_register ("Memberref signature cache size",
87 MONO_COUNTER_METADATA | MONO_COUNTER_INT, &memberref_sig_cache_size);
88
89 inited = TRUE;
90 }
91 }
92
93 void
94 mono_loader_cleanup (void)
95 {
96 TlsFree (loader_error_thread_id);
97 TlsFree (loader_lock_nest_id);
98
99 /*DeleteCriticalSection (&loader_mutex);*/
100 }
101
102 /*
103 * Handling of type load errors should be done as follows:
104 *
105 * If something could not be loaded, the loader should call one of the
106 * mono_loader_set_error_XXX functions ()
107 * with the appropriate arguments, then return NULL to report the failure. The error
108 * should be propagated until it reaches code which can throw managed exceptions. At that
109 * point, an exception should be thrown based on the information returned by
110 * mono_loader_get_last_error (). Then the error should be cleared by calling
111 * mono_loader_clear_error ().
112 */
113
114 static void
115 set_loader_error (MonoLoaderError *error)
116 {
117 TlsSetValue (loader_error_thread_id, error);
118 }
119
120 /**
121 * mono_loader_set_error_assembly_load:
122 *
123 * Set the loader error for this thread.
124 */
125 void
126 mono_loader_set_error_assembly_load (const char *assembly_name, gboolean ref_only)
127 {
128 MonoLoaderError *error;
129
130 if (mono_loader_get_last_error ())
131 return;
132
133 error = g_new0 (MonoLoaderError, 1);
134 error->exception_type = MONO_EXCEPTION_FILE_NOT_FOUND;
135 error->assembly_name = g_strdup (assembly_name);
136 error->ref_only = ref_only;
137
138 /*
139 * This is not strictly needed, but some (most) of the loader code still
140 * can't deal with load errors, and this message is more helpful than an
141 * assert.
142 */
143 if (ref_only)
144 g_warning ("Cannot resolve dependency to assembly '%s' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.", assembly_name);
145 else
146 g_warning ("Could not load file or assembly '%s' or one of its dependencies.", assembly_name);
147
148 set_loader_error (error);
149 }
150
151 /**
152 * mono_loader_set_error_type_load:
153 *
154 * Set the loader error for this thread.
155 */
156 void
157 mono_loader_set_error_type_load (const char *class_name, const char *assembly_name)
158 {
159 MonoLoaderError *error;
160
161 if (mono_loader_get_last_error ())
162 return;
163
164 error = g_new0 (MonoLoaderError, 1);
165 error->exception_type = MONO_EXCEPTION_TYPE_LOAD;
166 error->class_name = g_strdup (class_name);
167 error->assembly_name = g_strdup (assembly_name);
168
169 /*
170 * This is not strictly needed, but some (most) of the loader code still
171 * can't deal with load errors, and this message is more helpful than an
172 * assert.
173 */
174 g_warning ("The class %s could not be loaded, used in %s", class_name, assembly_name);
175
176 set_loader_error (error);
177 }
178
179 /*
180 * mono_loader_set_error_method_load:
181 *
182 * Set the loader error for this thread. MEMBER_NAME should point to a string
183 * inside metadata.
184 */
185 void
186 mono_loader_set_error_method_load (const char *class_name, const char *member_name)
187 {
188 MonoLoaderError *error;
189
190 /* FIXME: Store the signature as well */
191 if (mono_loader_get_last_error ())
192 return;
193
194 error = g_new0 (MonoLoaderError, 1);
195 error->exception_type = MONO_EXCEPTION_MISSING_METHOD;
196 error->class_name = g_strdup (class_name);
197 error->member_name = member_name;
198
199 set_loader_error (error);
200 }
201
202 /*
203 * mono_loader_set_error_field_load:
204 *
205 * Set the loader error for this thread. MEMBER_NAME should point to a string
206 * inside metadata.
207 */
208 void
209 mono_loader_set_error_field_load (MonoClass *klass, const char *member_name)
210 {
211 MonoLoaderError *error;
212
213 /* FIXME: Store the signature as well */
214 if (mono_loader_get_last_error ())
215 return;
216
217 error = g_new0 (MonoLoaderError, 1);
218 error->exception_type = MONO_EXCEPTION_MISSING_FIELD;
219 error->klass = klass;
220 error->member_name = member_name;
221
222 set_loader_error (error);
223 }
224
225 /*
226 * mono_loader_set_error_bad_image:
227 *
228 * Set the loader error for this thread.
229 */
230 void
231 mono_loader_set_error_bad_image (char *msg)
232 {
233 MonoLoaderError *error;
234
235 if (mono_loader_get_last_error ())
236 return;
237
238 error = g_new0 (MonoLoaderError, 1);
239 error->exception_type = MONO_EXCEPTION_BAD_IMAGE;
240 error->msg = msg;
241
242 set_loader_error (error);
243 }
244
245
246 /*
247 * mono_loader_get_last_error:
248 *
249 * Returns information about the last type load exception encountered by the loader, or
250 * NULL. After use, the exception should be cleared by calling mono_loader_clear_error.
251 */
252 MonoLoaderError*
253 mono_loader_get_last_error (void)
254 {
255 return (MonoLoaderError*)TlsGetValue (loader_error_thread_id);
256 }
257
258 /**
259 * mono_loader_clear_error:
260 *
261 * Disposes any loader error messages on this thread
262 */
263 void
264 mono_loader_clear_error (void)
265 {
266 MonoLoaderError *ex = (MonoLoaderError*)TlsGetValue (loader_error_thread_id);
267
268 if (ex) {
269 g_free (ex->class_name);
270 g_free (ex->assembly_name);
271 g_free (ex->msg);
272 g_free (ex);
273
274 TlsSetValue (loader_error_thread_id, NULL);
275 }
276 }
277
278 /**
279 * mono_loader_error_prepare_exception:
280 * @error: The MonoLoaderError to turn into an exception
281 *
282 * This turns a MonoLoaderError into an exception that can be thrown
283 * and resets the Mono Loader Error state during this process.
284 *
285 */
286 MonoException *
287 mono_loader_error_prepare_exception (MonoLoaderError *error)
288 {
289 MonoException *ex = NULL;
290
291 switch (error->exception_type) {
292 case MONO_EXCEPTION_TYPE_LOAD: {
293 char *cname = g_strdup (error->class_name);
294 char *aname = g_strdup (error->assembly_name);
295 MonoString *class_name;
296
297 mono_loader_clear_error ();
298
299 class_name = mono_string_new (mono_domain_get (), cname);
300
301 ex = mono_get_exception_type_load (class_name, aname);
302 g_free (cname);
303 g_free (aname);
304 break;
305 }
306 case MONO_EXCEPTION_MISSING_METHOD: {
307 char *cname = g_strdup (error->class_name);
308 char *aname = g_strdup (error->member_name);
309
310 mono_loader_clear_error ();
311 ex = mono_get_exception_missing_method (cname, aname);
312 g_free (cname);
313 g_free (aname);
314 break;
315 }
316
317 case MONO_EXCEPTION_MISSING_FIELD: {
318 char *cnspace = g_strdup ((error->klass && *error->klass->name_space) ? error->klass->name_space : "");
319 char *cname = g_strdup (error->klass ? error->klass->name : "");
320 char *cmembername = g_strdup (error->member_name);
321 char *class_name;
322
323 mono_loader_clear_error ();
324 class_name = g_strdup_printf ("%s%s%s", cnspace, cnspace ? "." : "", cname);
325
326 ex = mono_get_exception_missing_field (class_name, cmembername);
327 g_free (class_name);
328 g_free (cname);
329 g_free (cmembername);
330 g_free (cnspace);
331 break;
332 }
333
334 case MONO_EXCEPTION_FILE_NOT_FOUND: {
335 char *msg;
336 char *filename;
337
338 if (error->ref_only)
339 msg = g_strdup_printf ("Cannot resolve dependency to assembly '%s' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.", error->assembly_name);
340 else
341 msg = g_strdup_printf ("Could not load file or assembly '%s' or one of its dependencies.", error->assembly_name);
342 filename = g_strdup (error->assembly_name);
343 /* Has to call this before calling anything which might call mono_class_init () */
344 mono_loader_clear_error ();
345 ex = mono_get_exception_file_not_found2 (msg, mono_string_new (mono_domain_get (), filename));
346 g_free (msg);
347 g_free (filename);
348 break;
349 }
350
351 case MONO_EXCEPTION_BAD_IMAGE: {
352 char *msg = g_strdup (error->msg);
353 mono_loader_clear_error ();
354 ex = mono_get_exception_bad_image_format (msg);
355 g_free (msg);
356 break;
357 }
358
359 default:
360 g_assert_not_reached ();
361 }
362
363 return ex;
364 }
365
366 /*
367 * find_cached_memberref_sig:
368 *
369 * Return a cached copy of the memberref signature identified by SIG_IDX.
370 * We use a gpointer since the cache stores both MonoTypes and MonoMethodSignatures.
371 * A cache is needed since the type/signature parsing routines allocate everything
372 * from a mempool, so without a cache, multiple requests for the same signature would
373 * lead to unbounded memory growth. For normal methods/fields this is not a problem
374 * since the resulting methods/fields are cached, but inflated methods/fields cannot
375 * be cached.
376 * LOCKING: Acquires the loader lock.
377 */
378 static gpointer
379 find_cached_memberref_sig (MonoImage *image, guint32 sig_idx)
380 {
381 gpointer res;
382
383 mono_loader_lock ();
384 res = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (sig_idx));
385 mono_loader_unlock ();
386
387 return res;
388 }
389
390 static gpointer
391 cache_memberref_sig (MonoImage *image, guint32 sig_idx, gpointer sig)
392 {
393 gpointer prev_sig;
394
395 mono_loader_lock ();
396 prev_sig = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (sig_idx));
397 if (prev_sig) {
398 /* Somebody got in before us */
399 sig = prev_sig;
400 }
401 else {
402 g_hash_table_insert (image->memberref_signatures, GUINT_TO_POINTER (sig_idx), sig);
403 /* An approximation based on glib 2.18 */
404 memberref_sig_cache_size += sizeof (gpointer) * 4;
405 }
406
407 mono_loader_unlock ();
408
409 return sig;
410 }
411
412 static MonoClassField*
413 field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass,
414 MonoGenericContext *context)
415 {
416 MonoClass *klass;
417 MonoClassField *field;
418 MonoTableInfo *tables = image->tables;
419 MonoType *sig_type;
420 guint32 cols[6];
421 guint32 nindex, class, class_table;
422 const char *fname;
423 const char *ptr;
424 guint32 idx = mono_metadata_token_index (token);
425
426 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
427 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
428 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
429
430 fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
431
432 if (!mono_verifier_verify_memberref_signature (image, cols [MONO_MEMBERREF_SIGNATURE], NULL)) {
433 mono_loader_set_error_bad_image (g_strdup_printf ("Bad field signature class token 0x%08x field name %s token 0x%08x on image %s", class, fname, token, image->name));
434 return NULL;
435 }
436
437 switch (class) {
438 case MONO_MEMBERREF_PARENT_TYPEDEF:
439 class_table = MONO_TOKEN_TYPE_DEF;
440 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | nindex);
441 break;
442 case MONO_MEMBERREF_PARENT_TYPEREF:
443 class_table = MONO_TOKEN_TYPE_REF;
444 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
445 break;
446 case MONO_MEMBERREF_PARENT_TYPESPEC:
447 class_table = MONO_TOKEN_TYPE_SPEC;
448 klass = mono_class_get_full (image, MONO_TOKEN_TYPE_SPEC | nindex, context);
449 break;
450 default:
451 /*FIXME this must set a loader error!*/
452 g_warning ("field load from %x", class);
453 return NULL;
454 }
455
456 if (!klass) {
457 char *name = mono_class_name_from_token (image, class_table | nindex);
458 g_warning ("Missing field %s in class %s (type token %d)", fname, name, class_table | nindex);
459 mono_loader_set_error_type_load (name, image->assembly_name);
460 g_free (name);
461 return NULL;
462 }
463
464 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
465 mono_metadata_decode_blob_size (ptr, &ptr);
466 /* we may want to check the signature here... */
467
468 if (*ptr++ != 0x6) {
469 g_warning ("Bad field signature class token %08x field name %s token %08x", class, fname, token);
470 mono_loader_set_error_field_load (klass, fname);
471 return NULL;
472 }
473 /* FIXME: This needs a cache, especially for generic instances, since
474 * mono_metadata_parse_type () allocates everything from a mempool.
475 */
476 sig_type = find_cached_memberref_sig (image, cols [MONO_MEMBERREF_SIGNATURE]);
477 if (!sig_type) {
478 sig_type = mono_metadata_parse_type (image, MONO_PARSE_TYPE, 0, ptr, &ptr);
479 if (sig_type == NULL) {
480 mono_loader_set_error_field_load (klass, fname);
481 return NULL;
482 }
483 sig_type = cache_memberref_sig (image, cols [MONO_MEMBERREF_SIGNATURE], sig_type);
484 }
485
486 mono_class_init (klass); /*FIXME is this really necessary?*/
487 if (retklass)
488 *retklass = klass;
489 field = mono_class_get_field_from_name_full (klass, fname, sig_type);
490
491 if (!field)
492 mono_loader_set_error_field_load (klass, fname);
493
494 return field;
495 }
496
497 MonoClassField*
498 mono_field_from_token (MonoImage *image, guint32 token, MonoClass **retklass,
499 MonoGenericContext *context)
500 {
501 MonoClass *k;
502 guint32 type;
503 MonoClassField *field;
504
505 if (image->dynamic) {
506 MonoClassField *result;
507 MonoClass *handle_class;
508
509 *retklass = NULL;
510 result = mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context);
511 // This checks the memberref type as well
512 if (!result || handle_class != mono_defaults.fieldhandle_class) {
513 mono_loader_set_error_bad_image (g_strdup_printf ("Bad field token 0x%08x on image %s.", token, image->name));
514 return NULL;
515 }
516 *retklass = result->parent;
517 return result;
518 }
519
520 mono_loader_lock ();
521 if ((field = g_hash_table_lookup (image->field_cache, GUINT_TO_POINTER (token)))) {
522 *retklass = field->parent;
523 mono_loader_unlock ();
524 return field;
525 }
526 mono_loader_unlock ();
527
528 if (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
529 field = field_from_memberref (image, token, retklass, context);
530 else {
531 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
532 if (!type)
533 return NULL;
534 k = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
535 if (!k)
536 return NULL;
537 mono_class_init (k);
538 if (retklass)
539 *retklass = k;
540 field = mono_class_get_field (k, token);
541 }
542
543 mono_loader_lock ();
544 if (field && field->parent && !field->parent->generic_class && !field->parent->generic_container)
545 g_hash_table_insert (image->field_cache, GUINT_TO_POINTER (token), field);
546 mono_loader_unlock ();
547 return field;
548 }
549
550 static gboolean
551 mono_metadata_signature_vararg_match (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
552 {
553 int i;
554
555 if (sig1->hasthis != sig2->hasthis ||
556 sig1->sentinelpos != sig2->sentinelpos)
557 return FALSE;
558
559 for (i = 0; i < sig1->sentinelpos; i++) {
560 MonoType *p1 = sig1->params[i];
561 MonoType *p2 = sig2->params[i];
562
563 /*if (p1->attrs != p2->attrs)
564 return FALSE;
565 */
566 if (!mono_metadata_type_equal (p1, p2))
567 return FALSE;
568 }
569
570 if (!mono_metadata_type_equal (sig1->ret, sig2->ret))
571 return FALSE;
572 return TRUE;
573 }
574
575 static MonoMethod *
576 find_method_in_class (MonoClass *klass, const char *name, const char *qname, const char *fqname,
577 MonoMethodSignature *sig, MonoClass *from_class)
578 {
579 int i;
580
581 /* Search directly in the metadata to avoid calling setup_methods () */
582
583 /* FIXME: !from_class->generic_class condition causes test failures. */
584 if (klass->type_token && !klass->image->dynamic && !klass->methods && !klass->rank && klass == from_class && !from_class->generic_class) {
585 for (i = 0; i < klass->method.count; ++i) {
586 guint32 cols [MONO_METHOD_SIZE];
587 MonoMethod *method;
588 const char *m_name;
589 MonoMethodSignature *other_sig;
590
591 mono_metadata_decode_table_row (klass->image, MONO_TABLE_METHOD, klass->method.first + i, cols, MONO_METHOD_SIZE);
592
593 m_name = mono_metadata_string_heap (klass->image, cols [MONO_METHOD_NAME]);
594
595 if (!((fqname && !strcmp (m_name, fqname)) ||
596 (qname && !strcmp (m_name, qname)) ||
597 (name && !strcmp (m_name, name))))
598 continue;
599
600 method = mono_get_method (klass->image, MONO_TOKEN_METHOD_DEF | (klass->method.first + i + 1), klass);
601 other_sig = mono_method_signature (method);
602 if (method && other_sig && (sig->call_convention != MONO_CALL_VARARG) && mono_metadata_signature_equal (sig, other_sig))
603 return method;
604 }
605 }
606
607 mono_class_setup_methods (klass);
608 /*
609 We can't fail lookup of methods otherwise the runtime will fail with MissingMethodException instead of TypeLoadException.
610 See mono/tests/generic-type-load-exception.2.il
611 FIXME we should better report this error to the caller
612 */
613 if (!klass->methods)
614 return NULL;
615 for (i = 0; i < klass->method.count; ++i) {
616 MonoMethod *m = klass->methods [i];
617 MonoMethodSignature *msig;
618
619 if (!((fqname && !strcmp (m->name, fqname)) ||
620 (qname && !strcmp (m->name, qname)) ||
621 (name && !strcmp (m->name, name))))
622 continue;
623 msig = mono_method_signature (m);
624 if (!msig)
625 continue;
626
627 if (sig->call_convention == MONO_CALL_VARARG) {
628 if (mono_metadata_signature_vararg_match (sig, msig))
629 break;
630 } else {
631 if (mono_metadata_signature_equal (sig, msig))
632 break;
633 }
634 }
635
636 if (i < klass->method.count)
637 return mono_class_get_method_by_index (from_class, i);
638 return NULL;
639 }
640
641 static MonoMethod *
642 find_method (MonoClass *in_class, MonoClass *ic, const char* name, MonoMethodSignature *sig, MonoClass *from_class)
643 {
644 int i;
645 char *qname, *fqname, *class_name;
646 gboolean is_interface;
647 MonoMethod *result = NULL;
648
649 is_interface = MONO_CLASS_IS_INTERFACE (in_class);
650
651 if (ic) {
652 class_name = mono_type_get_name_full (&ic->byval_arg, MONO_TYPE_NAME_FORMAT_IL);
653
654 qname = g_strconcat (class_name, ".", name, NULL);
655 if (ic->name_space && ic->name_space [0])
656 fqname = g_strconcat (ic->name_space, ".", class_name, ".", name, NULL);
657 else
658 fqname = NULL;
659 } else
660 class_name = qname = fqname = NULL;
661
662 while (in_class) {
663 g_assert (from_class);
664 result = find_method_in_class (in_class, name, qname, fqname, sig, from_class);
665 if (result)
666 goto out;
667
668 if (name [0] == '.' && (!strcmp (name, ".ctor") || !strcmp (name, ".cctor")))
669 break;
670
671 g_assert (from_class->interface_offsets_count == in_class->interface_offsets_count);
672 for (i = 0; i < in_class->interface_offsets_count; i++) {
673 MonoClass *in_ic = in_class->interfaces_packed [i];
674 MonoClass *from_ic = from_class->interfaces_packed [i];
675 char *ic_qname, *ic_fqname, *ic_class_name;
676
677 ic_class_name = mono_type_get_name_full (&in_ic->byval_arg, MONO_TYPE_NAME_FORMAT_IL);
678 ic_qname = g_strconcat (ic_class_name, ".", name, NULL);
679 if (in_ic->name_space && in_ic->name_space [0])
680 ic_fqname = g_strconcat (in_ic->name_space, ".", ic_class_name, ".", name, NULL);
681 else
682 ic_fqname = NULL;
683
684 result = find_method_in_class (in_ic, ic ? name : NULL, ic_qname, ic_fqname, sig, from_ic);
685 g_free (ic_class_name);
686 g_free (ic_fqname);
687 g_free (ic_qname);
688 if (result)
689 goto out;
690 }
691
692 in_class = in_class->parent;
693 from_class = from_class->parent;
694 }
695 g_assert (!in_class == !from_class);
696
697 if (is_interface)
698 result = find_method_in_class (mono_defaults.object_class, name, qname, fqname, sig, mono_defaults.object_class);
699
700 out:
701 g_free (class_name);
702 g_free (fqname);
703 g_free (qname);
704 return result;
705 }
706
707 static MonoMethodSignature*
708 inflate_generic_signature (MonoImage *image, MonoMethodSignature *sig, MonoGenericContext *context)
709 {
710 MonoMethodSignature *res;
711 gboolean is_open;
712 int i;
713
714 if (!context)
715 return sig;
716
717 res = g_malloc0 (MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)sig->param_count) * sizeof (MonoType*));
718 res->param_count = sig->param_count;
719 res->sentinelpos = -1;
720 res->ret = mono_class_inflate_generic_type (sig->ret, context);
721 is_open = mono_class_is_open_constructed_type (res->ret);
722 for (i = 0; i < sig->param_count; ++i) {
723 res->params [i] = mono_class_inflate_generic_type (sig->params [i], context);
724 if (!is_open)
725 is_open = mono_class_is_open_constructed_type (res->params [i]);
726 }
727 res->hasthis = sig->hasthis;
728 res->explicit_this = sig->explicit_this;
729 res->call_convention = sig->call_convention;
730 res->pinvoke = sig->pinvoke;
731 res->generic_param_count = sig->generic_param_count;
732 res->sentinelpos = sig->sentinelpos;
733 res->has_type_parameters = is_open;
734 res->is_inflated = 1;
735 return res;
736 }
737
738 static MonoMethodHeader*
739 inflate_generic_header (MonoMethodHeader *header, MonoGenericContext *context)
740 {
741 MonoMethodHeader *res;
742 int i;
743 res = g_malloc0 (MONO_SIZEOF_METHOD_HEADER + sizeof (gpointer) * header->num_locals);
744 res->code = header->code;
745 res->code_size = header->code_size;
746 res->max_stack = header->max_stack;
747 res->num_clauses = header->num_clauses;
748 res->init_locals = header->init_locals;
749 res->num_locals = header->num_locals;
750 res->clauses = header->clauses;
751 for (i = 0; i < header->num_locals; ++i)
752 res->locals [i] = mono_class_inflate_generic_type (header->locals [i], context);
753 if (res->num_clauses) {
754 res->clauses = g_memdup (header->clauses, sizeof (MonoExceptionClause) * res->num_clauses);
755 for (i = 0; i < header->num_clauses; ++i) {
756 MonoExceptionClause *clause = &res->clauses [i];
757 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE)
758 continue;
759 clause->data.catch_class = mono_class_inflate_generic_class (clause->data.catch_class, context);
760 }
761 }
762 return res;
763 }
764
765 /*
766 * token is the method_ref/def/spec token used in a call IL instruction.
767 */
768 MonoMethodSignature*
769 mono_method_get_signature_full (MonoMethod *method, MonoImage *image, guint32 token, MonoGenericContext *context)
770 {
771 int table = mono_metadata_token_table (token);
772 int idx = mono_metadata_token_index (token);
773 int sig_idx;
774 guint32 cols [MONO_MEMBERREF_SIZE];
775 MonoMethodSignature *sig;
776 const char *ptr;
777
778 /* !table is for wrappers: we should really assign their own token to them */
779 if (!table || table == MONO_TABLE_METHOD)
780 return mono_method_signature (method);
781
782 if (table == MONO_TABLE_METHODSPEC) {
783 /* the verifier (do_invoke_method) will turn the NULL into a verifier error */
784 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) || !method->is_inflated)
785 return NULL;
786
787 return mono_method_signature (method);
788 }
789
790 if (method->klass->generic_class)
791 return mono_method_signature (method);
792
793 if (image->dynamic)
794 /* FIXME: This might be incorrect for vararg methods */
795 return mono_method_signature (method);
796
797 mono_metadata_decode_row (&image->tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
798 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
799
800 sig = find_cached_memberref_sig (image, sig_idx);
801 if (!sig) {
802 if (!mono_verifier_verify_memberref_signature (image, sig_idx, NULL)) {
803 guint32 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
804 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
805
806 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method signature class token 0x%08x field name %s token 0x%08x on image %s", class, fname, token, image->name));
807 return NULL;
808 }
809
810 ptr = mono_metadata_blob_heap (image, sig_idx);
811 mono_metadata_decode_blob_size (ptr, &ptr);
812 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
813 if (!sig)
814 return NULL;
815 sig = cache_memberref_sig (image, sig_idx, sig);
816 }
817
818 if (!mono_verifier_is_sig_compatible (image, method, sig)) {
819 guint32 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
820 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
821
822 mono_loader_set_error_bad_image (g_strdup_printf ("Incompatible method signature class token 0x%08x field name %s token 0x%08x on image %s", class, fname, token, image->name));
823 return NULL;
824 }
825
826 if (context) {
827 MonoMethodSignature *cached;
828
829 /* This signature is not owned by a MonoMethod, so need to cache */
830 sig = inflate_generic_signature (image, sig, context);
831 cached = mono_metadata_get_inflated_signature (sig, context);
832 if (cached != sig)
833 mono_metadata_free_inflated_signature (sig);
834 else
835 inflated_signatures_size += mono_metadata_signature_size (cached);
836 sig = cached;
837 }
838
839 return sig;
840 }
841
842 MonoMethodSignature*
843 mono_method_get_signature (MonoMethod *method, MonoImage *image, guint32 token)
844 {
845 return mono_method_get_signature_full (method, image, token, NULL);
846 }
847
848 /* this is only for the typespec array methods */
849 MonoMethod*
850 mono_method_search_in_array_class (MonoClass *klass, const char *name, MonoMethodSignature *sig)
851 {
852 int i;
853
854 mono_class_setup_methods (klass);
855 g_assert (!klass->exception_type); /*FIXME this should not fail, right?*/
856 for (i = 0; i < klass->method.count; ++i) {
857 MonoMethod *method = klass->methods [i];
858 if (strcmp (method->name, name) == 0 && sig->param_count == method->signature->param_count)
859 return method;
860 }
861 return NULL;
862 }
863
864 static MonoMethod *
865 method_from_memberref (MonoImage *image, guint32 idx, MonoGenericContext *typespec_context,
866 gboolean *used_context)
867 {
868 MonoClass *klass = NULL;
869 MonoMethod *method = NULL;
870 MonoTableInfo *tables = image->tables;
871 guint32 cols[6];
872 guint32 nindex, class, sig_idx;
873 const char *mname;
874 MonoMethodSignature *sig;
875 const char *ptr;
876
877 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
878 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
879 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
880 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
881 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
882
883 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
884
885 /*
886 * Whether we actually used the `typespec_context' or not.
887 * This is used to tell our caller whether or not it's safe to insert the returned
888 * method into a cache.
889 */
890 if (used_context)
891 *used_context = class == MONO_MEMBERREF_PARENT_TYPESPEC;
892
893 switch (class) {
894 case MONO_MEMBERREF_PARENT_TYPEREF:
895 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
896 if (!klass) {
897 char *name = mono_class_name_from_token (image, MONO_TOKEN_TYPE_REF | nindex);
898 g_warning ("Missing method %s in assembly %s, type %s", mname, image->name, name);
899 mono_loader_set_error_type_load (name, image->assembly_name);
900 g_free (name);
901 return NULL;
902 }
903 break;
904 case MONO_MEMBERREF_PARENT_TYPESPEC:
905 /*
906 * Parse the TYPESPEC in the parent's context.
907 */
908 klass = mono_class_get_full (image, MONO_TOKEN_TYPE_SPEC | nindex, typespec_context);
909 if (!klass) {
910 char *name = mono_class_name_from_token (image, MONO_TOKEN_TYPE_SPEC | nindex);
911 g_warning ("Missing method %s in assembly %s, type %s", mname, image->name, name);
912 mono_loader_set_error_type_load (name, image->assembly_name);
913 g_free (name);
914 return NULL;
915 }
916 break;
917 case MONO_MEMBERREF_PARENT_TYPEDEF:
918 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | nindex);
919 if (!klass) {
920 char *name = mono_class_name_from_token (image, MONO_TOKEN_TYPE_DEF | nindex);
921 g_warning ("Missing method %s in assembly %s, type %s", mname, image->name, name);
922 mono_loader_set_error_type_load (name, image->assembly_name);
923 g_free (name);
924 return NULL;
925 }
926 break;
927 case MONO_MEMBERREF_PARENT_METHODDEF:
928 return mono_get_method (image, MONO_TOKEN_METHOD_DEF | nindex, NULL);
929
930 default:
931 {
932 /* This message leaks */
933 char *message = g_strdup_printf ("Memberref parent unknown: class: %d, index %d", class, nindex);
934 mono_loader_set_error_method_load ("", message);
935 return NULL;
936 }
937
938 }
939 g_assert (klass);
940 mono_class_init (klass);
941
942 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
943
944 if (!mono_verifier_verify_memberref_signature (image, sig_idx, NULL)) {
945 mono_loader_set_error_method_load (klass->name, mname);
946 return NULL;
947 }
948
949 ptr = mono_metadata_blob_heap (image, sig_idx);
950 mono_metadata_decode_blob_size (ptr, &ptr);
951
952 sig = find_cached_memberref_sig (image, sig_idx);
953 if (!sig) {
954 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
955 if (sig == NULL)
956 return NULL;
957
958 sig = cache_memberref_sig (image, sig_idx, sig);
959 }
960
961 switch (class) {
962 case MONO_MEMBERREF_PARENT_TYPEREF:
963 case MONO_MEMBERREF_PARENT_TYPEDEF:
964 method = find_method (klass, NULL, mname, sig, klass);
965 break;
966
967 case MONO_MEMBERREF_PARENT_TYPESPEC: {
968 MonoType *type;
969
970 type = &klass->byval_arg;
971
972 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
973 MonoClass *in_class = klass->generic_class ? klass->generic_class->container_class : klass;
974 method = find_method (in_class, NULL, mname, sig, klass);
975 break;
976 }
977
978 /* we're an array and we created these methods already in klass in mono_class_init () */
979 method = mono_method_search_in_array_class (klass, mname, sig);
980 break;
981 }
982 default:
983 g_error ("Memberref parent unknown: class: %d, index %d", class, nindex);
984 g_assert_not_reached ();
985 }
986
987 if (!method) {
988 char *msig = mono_signature_get_desc (sig, FALSE);
989 char * class_name = mono_type_get_name (&klass->byval_arg);
990 GString *s = g_string_new (mname);
991 if (sig->generic_param_count)
992 g_string_append_printf (s, "<[%d]>", sig->generic_param_count);
993 g_string_append_printf (s, "(%s)", msig);
994 g_free (msig);
995 msig = g_string_free (s, FALSE);
996
997 g_warning (
998 "Missing method %s::%s in assembly %s, referenced in assembly %s",
999 class_name, msig, klass->image->name, image->name);
1000 mono_loader_set_error_method_load (class_name, mname);
1001 g_free (msig);
1002 g_free (class_name);
1003 }
1004
1005 return method;
1006 }
1007
1008 static MonoMethod *
1009 method_from_methodspec (MonoImage *image, MonoGenericContext *context, guint32 idx)
1010 {
1011 MonoError error;
1012 MonoMethod *method;
1013 MonoClass *klass;
1014 MonoTableInfo *tables = image->tables;
1015 MonoGenericContext new_context;
1016 MonoGenericInst *inst;
1017 const char *ptr;
1018 guint32 cols [MONO_METHODSPEC_SIZE];
1019 guint32 token, nindex, param_count;
1020
1021 mono_metadata_decode_row (&tables [MONO_TABLE_METHODSPEC], idx - 1, cols, MONO_METHODSPEC_SIZE);
1022 token = cols [MONO_METHODSPEC_METHOD];
1023 nindex = token >> MONO_METHODDEFORREF_BITS;
1024
1025 if (!mono_verifier_verify_methodspec_signature (image, cols [MONO_METHODSPEC_SIGNATURE], NULL))
1026 return NULL;
1027
1028 ptr = mono_metadata_blob_heap (image, cols [MONO_METHODSPEC_SIGNATURE]);
1029
1030 mono_metadata_decode_value (ptr, &ptr);
1031 ptr++;
1032 param_count = mono_metadata_decode_value (ptr, &ptr);
1033 g_assert (param_count);
1034
1035 inst = mono_metadata_parse_generic_inst (image, NULL, param_count, ptr, &ptr);
1036 if (context && inst->is_open) {
1037 inst = mono_metadata_inflate_generic_inst (inst, context, &error);
1038 if (!mono_error_ok (&error)) {
1039 mono_error_cleanup (&error); /*FIXME don't swallow error message.*/
1040 return NULL;
1041 }
1042 }
1043
1044 if ((token & MONO_METHODDEFORREF_MASK) == MONO_METHODDEFORREF_METHODDEF)
1045 method = mono_get_method_full (image, MONO_TOKEN_METHOD_DEF | nindex, NULL, context);
1046 else
1047 method = method_from_memberref (image, nindex, context, NULL);
1048
1049 if (!method)
1050 return NULL;
1051
1052 klass = method->klass;
1053
1054 if (klass->generic_class) {
1055 g_assert (method->is_inflated);
1056 method = ((MonoMethodInflated *) method)->declaring;
1057 }
1058
1059 new_context.class_inst = klass->generic_class ? klass->generic_class->context.class_inst : NULL;
1060 new_context.method_inst = inst;
1061
1062 return mono_class_inflate_generic_method_full (method, klass, &new_context);
1063 }
1064
1065 struct _MonoDllMap {
1066 char *dll;
1067 char *target;
1068 char *func;
1069 char *target_func;
1070 MonoDllMap *next;
1071 };
1072
1073 static MonoDllMap *global_dll_map;
1074
1075 static int
1076 mono_dllmap_lookup_list (MonoDllMap *dll_map, const char *dll, const char* func, const char **rdll, const char **rfunc) {
1077 int found = 0;
1078
1079 *rdll = dll;
1080
1081 if (!dll_map)
1082 return 0;
1083
1084 mono_loader_lock ();
1085
1086 /*
1087 * we use the first entry we find that matches, since entries from
1088 * the config file are prepended to the list and we document that the
1089 * later entries win.
1090 */
1091 for (; dll_map; dll_map = dll_map->next) {
1092 if (dll_map->dll [0] == 'i' && dll_map->dll [1] == ':') {
1093 if (g_ascii_strcasecmp (dll_map->dll + 2, dll))
1094 continue;
1095 } else if (strcmp (dll_map->dll, dll)) {
1096 continue;
1097 }
1098 if (!found && dll_map->target) {
1099 *rdll = dll_map->target;
1100 found = 1;
1101 /* we don't quit here, because we could find a full
1102 * entry that matches also function and that has priority.
1103 */
1104 }
1105 if (dll_map->func && strcmp (dll_map->func, func) == 0) {
1106 *rfunc = dll_map->target_func;
1107 break;
1108 }
1109 }
1110
1111 mono_loader_unlock ();
1112 return found;
1113 }
1114
1115 static int
1116 mono_dllmap_lookup (MonoImage *assembly, const char *dll, const char* func, const char **rdll, const char **rfunc)
1117 {
1118 int res;
1119 if (assembly && assembly->dll_map) {
1120 res = mono_dllmap_lookup_list (assembly->dll_map, dll, func, rdll, rfunc);
1121 if (res)
1122 return res;
1123 }
1124 return mono_dllmap_lookup_list (global_dll_map, dll, func, rdll, rfunc);
1125 }
1126
1127 /*
1128 * mono_dllmap_insert:
1129 *
1130 * LOCKING: Acquires the loader lock.
1131 *
1132 * NOTE: This can be called before the runtime is initialized, for example from
1133 * mono_config_parse ().
1134 */
1135 void
1136 mono_dllmap_insert (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfunc)
1137 {
1138 MonoDllMap *entry;
1139
1140 mono_loader_init ();
1141
1142 mono_loader_lock ();
1143
1144 if (!assembly) {
1145 entry = g_malloc0 (sizeof (MonoDllMap));
1146 entry->dll = dll? g_strdup (dll): NULL;
1147 entry->target = tdll? g_strdup (tdll): NULL;
1148 entry->func = func? g_strdup (func): NULL;
1149 entry->target_func = tfunc? g_strdup (tfunc): NULL;
1150 entry->next = global_dll_map;
1151 global_dll_map = entry;
1152 } else {
1153 entry = mono_image_alloc0 (assembly, sizeof (MonoDllMap));
1154 entry->dll = dll? mono_image_strdup (assembly, dll): NULL;
1155 entry->target = tdll? mono_image_strdup (assembly, tdll): NULL;
1156 entry->func = func? mono_image_strdup (assembly, func): NULL;
1157 entry->target_func = tfunc? mono_image_strdup (assembly, tfunc): NULL;
1158 entry->next = assembly->dll_map;
1159 assembly->dll_map = entry;
1160 }
1161
1162 mono_loader_unlock ();
1163 }
1164
1165 static GHashTable *global_module_map;
1166
1167 static MonoDl*
1168 cached_module_load (const char *name, int flags, char **err)
1169 {
1170 MonoDl *res;
1171
1172 if (err)
1173 *err = NULL;
1174 mono_loader_lock ();
1175 if (!global_module_map)
1176 global_module_map = g_hash_table_new (g_str_hash, g_str_equal);
1177 res = g_hash_table_lookup (global_module_map, name);
1178 if (res) {
1179 mono_loader_unlock ();
1180 return res;
1181 }
1182 res = mono_dl_open (name, flags, NULL);
1183 if (res)
1184 g_hash_table_insert (global_module_map, g_strdup (name), res);
1185 mono_loader_unlock ();
1186 return res;
1187 }
1188
1189 gpointer
1190 mono_lookup_pinvoke_call (MonoMethod *method, const char **exc_class, const char **exc_arg)
1191 {
1192 MonoImage *image = method->klass->image;
1193 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
1194 MonoTableInfo *tables = image->tables;
1195 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
1196 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
1197 guint32 im_cols [MONO_IMPLMAP_SIZE];
1198 guint32 scope_token;
1199 const char *import = NULL;
1200 const char *orig_scope;
1201 const char *new_scope;
1202 char *error_msg;
1203 char *full_name, *file_name;
1204 int i;
1205 MonoDl *module = NULL;
1206
1207 g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
1208
1209 if (piinfo->addr)
1210 return piinfo->addr;
1211
1212 if (method->klass->image->dynamic) {
1213 MonoReflectionMethodAux *method_aux =
1214 g_hash_table_lookup (
1215 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1216 if (!method_aux)
1217 return NULL;
1218
1219 import = method_aux->dllentry;
1220 orig_scope = method_aux->dll;
1221 }
1222 else {
1223 if (!piinfo->implmap_idx)
1224 return NULL;
1225
1226 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
1227
1228 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
1229 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
1230 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
1231 orig_scope = mono_metadata_string_heap (image, scope_token);
1232 }
1233
1234 mono_dllmap_lookup (image, orig_scope, import, &new_scope, &import);
1235
1236 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1237 "DllImport attempting to load: '%s'.", new_scope);
1238
1239 if (exc_class) {
1240 *exc_class = NULL;
1241 *exc_arg = NULL;
1242 }
1243
1244 /* we allow a special name to dlopen from the running process namespace */
1245 if (strcmp (new_scope, "__Internal") == 0)
1246 module = mono_dl_open (NULL, MONO_DL_LAZY, &error_msg);
1247
1248 /*
1249 * Try loading the module using a variety of names
1250 */
1251 for (i = 0; i < 4; ++i) {
1252 switch (i) {
1253 case 0:
1254 /* Try the original name */
1255 file_name = g_strdup (new_scope);
1256 break;
1257 case 1:
1258 /* Try trimming the .dll extension */
1259 if (strstr (new_scope, ".dll") == (new_scope + strlen (new_scope) - 4)) {
1260 file_name = g_strdup (new_scope);
1261 file_name [strlen (new_scope) - 4] = '\0';
1262 }
1263 else
1264 continue;
1265 break;
1266 case 2:
1267 if (strstr (new_scope, "lib") != new_scope) {
1268 file_name = g_strdup_printf ("lib%s", new_scope);
1269 }
1270 else
1271 continue;
1272 break;
1273 default:
1274 #ifndef TARGET_WIN32
1275 if (!g_ascii_strcasecmp ("user32.dll", new_scope) ||
1276 !g_ascii_strcasecmp ("kernel32.dll", new_scope) ||
1277 !g_ascii_strcasecmp ("user32", new_scope) ||
1278 !g_ascii_strcasecmp ("kernel", new_scope)) {
1279 file_name = g_strdup ("libMonoSupportW.so");
1280 } else
1281 #endif
1282 continue;
1283 #ifndef TARGET_WIN32
1284 break;
1285 #endif
1286 }
1287
1288 if (!module) {
1289 void *iter = NULL;
1290 while ((full_name = mono_dl_build_path (NULL, file_name, &iter))) {
1291 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1292 "DllImport loading location: '%s'.", full_name);
1293 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1294 if (!module) {
1295 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1296 "DllImport error loading library: '%s'.",
1297 error_msg);
1298 g_free (error_msg);
1299 }
1300 g_free (full_name);
1301 if (module)
1302 break;
1303 }
1304 }
1305
1306 if (!module) {
1307 void *iter = NULL;
1308 while ((full_name = mono_dl_build_path (".", file_name, &iter))) {
1309 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1310 "DllImport loading library: '%s'.", full_name);
1311 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1312 if (!module) {
1313 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1314 "DllImport error loading library '%s'.",
1315 error_msg);
1316 g_free (error_msg);
1317 }
1318 g_free (full_name);
1319 if (module)
1320 break;
1321 }
1322 }
1323
1324 if (!module) {
1325 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1326 "DllImport loading: '%s'.", file_name);
1327 module = cached_module_load (file_name, MONO_DL_LAZY, &error_msg);
1328 if (!module) {
1329 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1330 "DllImport error loading library '%s'.",
1331 error_msg);
1332 }
1333 }
1334
1335 g_free (file_name);
1336
1337 if (module)
1338 break;
1339 }
1340
1341 if (!module) {
1342 mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_DLLIMPORT,
1343 "DllImport unable to load library '%s'.",
1344 error_msg);
1345 g_free (error_msg);
1346
1347 if (exc_class) {
1348 *exc_class = "DllNotFoundException";
1349 *exc_arg = new_scope;
1350 }
1351 return NULL;
1352 }
1353
1354 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1355 "Searching for '%s'.", import);
1356
1357 if (piinfo->piflags & PINVOKE_ATTRIBUTE_NO_MANGLE) {
1358 error_msg = mono_dl_symbol (module, import, &piinfo->addr);
1359 } else {
1360 char *mangled_name = NULL, *mangled_name2 = NULL;
1361 int mangle_charset;
1362 int mangle_stdcall;
1363 int mangle_param_count;
1364 #ifdef TARGET_WIN32
1365 int param_count;
1366 #endif
1367
1368 /*
1369 * Search using a variety of mangled names
1370 */
1371 for (mangle_charset = 0; mangle_charset <= 1; mangle_charset ++) {
1372 for (mangle_stdcall = 0; mangle_stdcall <= 1; mangle_stdcall ++) {
1373 gboolean need_param_count = FALSE;
1374 #ifdef TARGET_WIN32
1375 if (mangle_stdcall > 0)
1376 need_param_count = TRUE;
1377 #endif
1378 for (mangle_param_count = 0; mangle_param_count <= (need_param_count ? 256 : 0); mangle_param_count += 4) {
1379
1380 if (piinfo->addr)
1381 continue;
1382
1383 mangled_name = (char*)import;
1384 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CHAR_SET_MASK) {
1385 case PINVOKE_ATTRIBUTE_CHAR_SET_UNICODE:
1386 /* Try the mangled name first */
1387 if (mangle_charset == 0)
1388 mangled_name = g_strconcat (import, "W", NULL);
1389 break;
1390 case PINVOKE_ATTRIBUTE_CHAR_SET_AUTO:
1391 #ifdef TARGET_WIN32
1392 if (mangle_charset == 0)
1393 mangled_name = g_strconcat (import, "W", NULL);
1394 #else
1395 /* Try the mangled name last */
1396 if (mangle_charset == 1)
1397 mangled_name = g_strconcat (import, "A", NULL);
1398 #endif
1399 break;
1400 case PINVOKE_ATTRIBUTE_CHAR_SET_ANSI:
1401 default:
1402 /* Try the mangled name last */
1403 if (mangle_charset == 1)
1404 mangled_name = g_strconcat (import, "A", NULL);
1405 break;
1406 }
1407
1408 #ifdef TARGET_WIN32
1409 if (mangle_param_count == 0)
1410 param_count = mono_method_signature (method)->param_count * sizeof (gpointer);
1411 else
1412 /* Try brute force, since it would be very hard to compute the stack usage correctly */
1413 param_count = mangle_param_count;
1414
1415 /* Try the stdcall mangled name */
1416 /*
1417 * gcc under windows creates mangled names without the underscore, but MS.NET
1418 * doesn't support it, so we doesn't support it either.
1419 */
1420 if (mangle_stdcall == 1)
1421 mangled_name2 = g_strdup_printf ("_%s@%d", mangled_name, param_count);
1422 else
1423 mangled_name2 = mangled_name;
1424 #else
1425 mangled_name2 = mangled_name;
1426 #endif
1427
1428 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1429 "Probing '%s'.", mangled_name2);
1430
1431 error_msg = mono_dl_symbol (module, mangled_name2, &piinfo->addr);
1432
1433 if (piinfo->addr)
1434 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1435 "Found as '%s'.", mangled_name2);
1436
1437 if (mangled_name != mangled_name2)
1438 g_free (mangled_name2);
1439 if (mangled_name != import)
1440 g_free (mangled_name);
1441 }
1442 }
1443 }
1444 }
1445
1446 if (!piinfo->addr) {
1447 g_free (error_msg);
1448 if (exc_class) {
1449 *exc_class = "EntryPointNotFoundException";
1450 *exc_arg = import;
1451 }
1452 return NULL;
1453 }
1454 return piinfo->addr;
1455 }
1456
1457 /*
1458 * LOCKING: assumes the loader lock to be taken.
1459 */
1460 static MonoMethod *
1461 mono_get_method_from_token (MonoImage *image, guint32 token, MonoClass *klass,
1462 MonoGenericContext *context, gboolean *used_context)
1463 {
1464 MonoMethod *result;
1465 int table = mono_metadata_token_table (token);
1466 int idx = mono_metadata_token_index (token);
1467 MonoTableInfo *tables = image->tables;
1468 MonoGenericContainer *generic_container = NULL, *container = NULL;
1469 const char *sig = NULL;
1470 int size;
1471 guint32 cols [MONO_TYPEDEF_SIZE];
1472
1473 if (image->dynamic) {
1474 MonoClass *handle_class;
1475
1476 result = mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context);
1477 // This checks the memberref type as well
1478 if (result && handle_class != mono_defaults.methodhandle_class) {
1479 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method token 0x%08x on image %s.", token, image->name));
1480 return NULL;
1481 }
1482 return result;
1483 }
1484
1485 if (table != MONO_TABLE_METHOD) {
1486 if (table == MONO_TABLE_METHODSPEC) {
1487 if (used_context) *used_context = TRUE;
1488 return method_from_methodspec (image, context, idx);
1489 }
1490 if (table != MONO_TABLE_MEMBERREF) {
1491 g_warning ("got wrong token: 0x%08x\n", token);
1492 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method token 0x%08x on image %s.", token, image->name));
1493 return NULL;
1494 }
1495 return method_from_memberref (image, idx, context, used_context);
1496 }
1497
1498 if (used_context) *used_context = FALSE;
1499
1500 if (idx > image->tables [MONO_TABLE_METHOD].rows) {
1501 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method token 0x%08x on image %s.", token, image->name));
1502 return NULL;
1503 }
1504
1505 mono_metadata_decode_row (&image->tables [MONO_TABLE_METHOD], idx - 1, cols, 6);
1506
1507 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1508 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
1509 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethodPInvoke));
1510 else
1511 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethod));
1512
1513 mono_stats.method_count ++;
1514
1515 if (!klass) { /*FIXME put this before the image alloc*/
1516 guint32 type = mono_metadata_typedef_from_method (image, token);
1517 if (!type)
1518 return NULL;
1519 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
1520 if (klass == NULL)
1521 return NULL;
1522 }
1523
1524 result->slot = -1;
1525 result->klass = klass;
1526 result->flags = cols [2];
1527 result->iflags = cols [1];
1528 result->token = token;
1529 result->name = mono_metadata_string_heap (image, cols [3]);
1530
1531 if (!sig) /* already taken from the methodref */
1532 sig = mono_metadata_blob_heap (image, cols [4]);
1533 size = mono_metadata_decode_blob_size (sig, &sig);
1534
1535 container = klass->generic_container;
1536
1537 /*
1538 * load_generic_params does a binary search so only call it if the method
1539 * is generic.
1540 */
1541 if (*sig & 0x10)
1542 generic_container = mono_metadata_load_generic_params (image, token, container);
1543 if (generic_container) {
1544 result->is_generic = TRUE;
1545 generic_container->owner.method = result;
1546 /*FIXME put this before the image alloc*/
1547 if (!mono_metadata_load_generic_param_constraints_full (image, token, generic_container))
1548 return NULL;
1549
1550 container = generic_container;
1551 }
1552
1553 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
1554 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
1555 result->string_ctor = 1;
1556 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
1557 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)result;
1558
1559 #ifdef TARGET_WIN32
1560 /* IJW is P/Invoke with a predefined function pointer. */
1561 if (image->is_module_handle && (cols [1] & METHOD_IMPL_ATTRIBUTE_NATIVE)) {
1562 piinfo->addr = mono_image_rva_map (image, cols [0]);
1563 g_assert (piinfo->addr);
1564 }
1565 #endif
1566 piinfo->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
1567 /* Native methods can have no map. */
1568 if (piinfo->implmap_idx)
1569 piinfo->piflags = mono_metadata_decode_row_col (&tables [MONO_TABLE_IMPLMAP], piinfo->implmap_idx - 1, MONO_IMPLMAP_FLAGS);
1570 }
1571
1572 if (generic_container)
1573 mono_method_set_generic_container (result, generic_container);
1574
1575 return result;
1576 }
1577
1578 MonoMethod *
1579 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
1580 {
1581 return mono_get_method_full (image, token, klass, NULL);
1582 }
1583
1584 MonoMethod *
1585 mono_get_method_full (MonoImage *image, guint32 token, MonoClass *klass,
1586 MonoGenericContext *context)
1587 {
1588 MonoMethod *result;
1589 gboolean used_context = FALSE;
1590
1591 /* We do everything inside the lock to prevent creation races */
1592
1593 mono_image_lock (image);
1594
1595 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD) {
1596 if (!image->method_cache)
1597 image->method_cache = g_hash_table_new (NULL, NULL);
1598 result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
1599 } else {
1600 if (!image->methodref_cache)
1601 image->methodref_cache = g_hash_table_new (NULL, NULL);
1602 result = g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
1603 }
1604 mono_image_unlock (image);
1605
1606 if (result)
1607 return result;
1608
1609 result = mono_get_method_from_token (image, token, klass, context, &used_context);
1610 if (!result)
1611 return NULL;
1612
1613 mono_image_lock (image);
1614 if (!used_context && !result->is_inflated) {
1615 MonoMethod *result2;
1616 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
1617 result2 = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
1618 else
1619 result2 = g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
1620
1621 if (result2) {
1622 mono_image_unlock (image);
1623 return result2;
1624 }
1625
1626 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
1627 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)), result);
1628 else
1629 g_hash_table_insert (image->methodref_cache, GINT_TO_POINTER (token), result);
1630 }
1631
1632 mono_image_unlock (image);
1633
1634 return result;
1635 }
1636
1637 /**
1638 * mono_get_method_constrained:
1639 *
1640 * This is used when JITing the `constrained.' opcode.
1641 *
1642 * This returns two values: the contrained method, which has been inflated
1643 * as the function return value; And the original CIL-stream method as
1644 * declared in cil_method. The later is used for verification.
1645 */
1646 MonoMethod *
1647 mono_get_method_constrained (MonoImage *image, guint32 token, MonoClass *constrained_class,
1648 MonoGenericContext *context, MonoMethod **cil_method)
1649 {
1650 MonoMethod *method, *result;
1651 MonoClass *ic = NULL;
1652 MonoGenericContext *method_context = NULL;
1653 MonoMethodSignature *sig, *original_sig;
1654
1655 mono_loader_lock ();
1656
1657 *cil_method = mono_get_method_from_token (image, token, NULL, context, NULL);
1658 if (!*cil_method) {
1659 mono_loader_unlock ();
1660 return NULL;
1661 }
1662
1663 mono_class_init (constrained_class);
1664 method = *cil_method;
1665 original_sig = sig = mono_method_signature (method);
1666 if (sig == NULL)
1667 return NULL;
1668
1669 if (method->is_inflated && sig->generic_param_count) {
1670 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
1671 sig = mono_method_signature (imethod->declaring); /*We assume that if the inflated method signature is valid, the declaring method is too*/
1672 method_context = mono_method_get_context (method);
1673
1674 original_sig = sig;
1675 /*
1676 * We must inflate the signature with the class instantiation to work on
1677 * cases where a class inherit from a generic type and the override replaces
1678 * any type argument which a concrete type. See #325283.
1679 */
1680 if (method_context->class_inst) {
1681 MonoGenericContext ctx;
1682 ctx.method_inst = NULL;
1683 ctx.class_inst = method_context->class_inst;
1684
1685 sig = inflate_generic_signature (method->klass->image, sig, &ctx);
1686 if (sig == NULL)
1687 return NULL;
1688 }
1689 }
1690
1691 if ((constrained_class != method->klass) && (MONO_CLASS_IS_INTERFACE (method->klass)))
1692 ic = method->klass;
1693
1694 result = find_method (constrained_class, ic, method->name, sig, constrained_class);
1695 if (sig != original_sig)
1696 mono_metadata_free_inflated_signature (sig);
1697
1698 if (!result) {
1699 g_warning ("Missing method %s.%s.%s in assembly %s token %x", method->klass->name_space,
1700 method->klass->name, method->name, image->name, token);
1701 mono_loader_unlock ();
1702 return NULL;
1703 }
1704
1705 if (method_context)
1706 result = mono_class_inflate_generic_method (result, method_context);
1707
1708 mono_loader_unlock ();
1709 return result;
1710 }
1711
1712 void
1713 mono_free_method (MonoMethod *method)
1714 {
1715 if (mono_profiler_get_events () & MONO_PROFILE_METHOD_EVENTS)
1716 mono_profiler_method_free (method);
1717
1718 /* FIXME: This hack will go away when the profiler will support freeing methods */
1719 if (mono_profiler_get_events () != MONO_PROFILE_NONE)
1720 return;
1721
1722 if (method->signature) {
1723 /*
1724 * FIXME: This causes crashes because the types inside signatures and
1725 * locals are shared.
1726 */
1727 /* mono_metadata_free_method_signature (method->signature); */
1728 /* g_free (method->signature); */
1729 }
1730
1731 if (method->dynamic) {
1732 MonoMethodWrapper *mw = (MonoMethodWrapper*)method;
1733 int i;
1734
1735 mono_marshal_free_dynamic_wrappers (method);
1736
1737 mono_image_property_remove (method->klass->image, method);
1738
1739 g_free ((char*)method->name);
1740 if (mw->header) {
1741 g_free ((char*)mw->header->code);
1742 for (i = 0; i < mw->header->num_locals; ++i)
1743 g_free (mw->header->locals [i]);
1744 g_free (mw->header->clauses);
1745 g_free (mw->header);
1746 }
1747 g_free (mw->method_data);
1748 g_free (method->signature);
1749 g_free (method);
1750 }
1751 }
1752
1753 void
1754 mono_method_get_param_names (MonoMethod *method, const char **names)
1755 {
1756 int i, lastp;
1757 MonoClass *klass;
1758 MonoTableInfo *methodt;
1759 MonoTableInfo *paramt;
1760 MonoMethodSignature *signature;
1761 guint32 idx;
1762
1763 if (method->is_inflated)
1764 method = ((MonoMethodInflated *) method)->declaring;
1765
1766 signature = mono_method_signature (method);
1767 /*FIXME this check is somewhat redundant since the caller usally will have to get the signature to figure out the
1768 number of arguments and allocate a properly sized array. */
1769 if (signature == NULL)
1770 return;
1771
1772 if (!signature->param_count)
1773 return;
1774
1775 for (i = 0; i < signature->param_count; ++i)
1776 names [i] = "";
1777
1778 klass = method->klass;
1779 if (klass->rank)
1780 return;
1781
1782 mono_class_init (klass);
1783
1784 if (klass->image->dynamic) {
1785 MonoReflectionMethodAux *method_aux =
1786 g_hash_table_lookup (
1787 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1788 if (method_aux && method_aux->param_names) {
1789 for (i = 0; i < mono_method_signature (method)->param_count; ++i)
1790 if (method_aux->param_names [i + 1])
1791 names [i] = method_aux->param_names [i + 1];
1792 }
1793 return;
1794 }
1795
1796 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1797 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1798 idx = mono_method_get_index (method);
1799 if (idx > 0) {
1800 guint32 cols [MONO_PARAM_SIZE];
1801 guint param_index;
1802
1803 param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1804
1805 if (idx < methodt->rows)
1806 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1807 else
1808 lastp = paramt->rows + 1;
1809 for (i = param_index; i < lastp; ++i) {
1810 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1811 if (cols [MONO_PARAM_SEQUENCE] && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) /* skip return param spec and bounds check*/
1812 names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass->image, cols [MONO_PARAM_NAME]);
1813 }
1814 }
1815 }
1816
1817 guint32
1818 mono_method_get_param_token (MonoMethod *method, int index)
1819 {
1820 MonoClass *klass = method->klass;
1821 MonoTableInfo *methodt;
1822 guint32 idx;
1823
1824 mono_class_init (klass);
1825
1826 if (klass->image->dynamic) {
1827 g_assert_not_reached ();
1828 }
1829
1830 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1831 idx = mono_method_get_index (method);
1832 if (idx > 0) {
1833 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1834
1835 if (index == -1)
1836 /* Return value */
1837 return mono_metadata_make_token (MONO_TABLE_PARAM, 0);
1838 else
1839 return mono_metadata_make_token (MONO_TABLE_PARAM, param_index + index);
1840 }
1841
1842 return 0;
1843 }
1844
1845 void
1846 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
1847 {
1848 int i, lastp;
1849 MonoClass *klass = method->klass;
1850 MonoTableInfo *methodt;
1851 MonoTableInfo *paramt;
1852 MonoMethodSignature *signature;
1853 guint32 idx;
1854
1855 signature = mono_method_signature (method);
1856 g_assert (signature); /*FIXME there is no way to signal error from this function*/
1857
1858 for (i = 0; i < signature->param_count + 1; ++i)
1859 mspecs [i] = NULL;
1860
1861 if (method->klass->image->dynamic) {
1862 MonoReflectionMethodAux *method_aux =
1863 g_hash_table_lookup (
1864 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1865 if (method_aux && method_aux->param_marshall) {
1866 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
1867 for (i = 0; i < signature->param_count + 1; ++i)
1868 if (dyn_specs [i]) {
1869 mspecs [i] = g_new0 (MonoMarshalSpec, 1);
1870 memcpy (mspecs [i], dyn_specs [i], sizeof (MonoMarshalSpec));
1871 mspecs [i]->data.custom_data.custom_name = g_strdup (dyn_specs [i]->data.custom_data.custom_name);
1872 mspecs [i]->data.custom_data.cookie = g_strdup (dyn_specs [i]->data.custom_data.cookie);
1873 }
1874 }
1875 return;
1876 }
1877
1878 mono_class_init (klass);
1879
1880 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1881 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1882 idx = mono_method_get_index (method);
1883 if (idx > 0) {
1884 guint32 cols [MONO_PARAM_SIZE];
1885 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1886
1887 if (idx < methodt->rows)
1888 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1889 else
1890 lastp = paramt->rows + 1;
1891
1892 for (i = param_index; i < lastp; ++i) {
1893 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1894
1895 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) {
1896 const char *tp;
1897 tp = mono_metadata_get_marshal_info (klass->image, i - 1, FALSE);
1898 g_assert (tp);
1899 mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass->image, tp);
1900 }
1901 }
1902
1903 return;
1904 }
1905 }
1906
1907 gboolean
1908 mono_method_has_marshal_info (MonoMethod *method)
1909 {
1910 int i, lastp;
1911 MonoClass *klass = method->klass;
1912 MonoTableInfo *methodt;
1913 MonoTableInfo *paramt;
1914 guint32 idx;
1915
1916 if (method->klass->image->dynamic) {
1917 MonoReflectionMethodAux *method_aux =
1918 g_hash_table_lookup (
1919 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1920 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
1921 if (dyn_specs) {
1922 for (i = 0; i < mono_method_signature (method)->param_count + 1; ++i)
1923 if (dyn_specs [i])
1924 return TRUE;
1925 }
1926 return FALSE;
1927 }
1928
1929 mono_class_init (klass);
1930
1931 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1932 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1933 idx = mono_method_get_index (method);
1934 if (idx > 0) {
1935 guint32 cols [MONO_PARAM_SIZE];
1936 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1937
1938 if (idx + 1 < methodt->rows)
1939 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1940 else
1941 lastp = paramt->rows + 1;
1942
1943 for (i = param_index; i < lastp; ++i) {
1944 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1945
1946 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL)
1947 return TRUE;
1948 }
1949 return FALSE;
1950 }
1951 return FALSE;
1952 }
1953
1954 gpointer
1955 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
1956 {
1957 void **data;
1958 g_assert (method != NULL);
1959 g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
1960
1961 if (method->is_inflated)
1962 method = ((MonoMethodInflated *) method)->declaring;
1963 data = ((MonoMethodWrapper *)method)->method_data;
1964 g_assert (data != NULL);
1965 g_assert (id <= GPOINTER_TO_UINT (*data));
1966 return data [id];
1967 }
1968
1969 static void
1970 default_stack_walk (MonoStackWalk func, gboolean do_il_offset, gpointer user_data) {
1971 g_error ("stack walk not installed");
1972 }
1973
1974 static MonoStackWalkImpl stack_walk = default_stack_walk;
1975
1976 void
1977 mono_stack_walk (MonoStackWalk func, gpointer user_data)
1978 {
1979 stack_walk (func, TRUE, user_data);
1980 }
1981
1982 void
1983 mono_stack_walk_no_il (MonoStackWalk func, gpointer user_data)
1984 {
1985 stack_walk (func, FALSE, user_data);
1986 }
1987
1988 void
1989 mono_install_stack_walk (MonoStackWalkImpl func)
1990 {
1991 stack_walk = func;
1992 }
1993
1994 static gboolean
1995 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
1996 {
1997 MonoMethod **dest = data;
1998 *dest = m;
1999 /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
2000
2001 return managed;
2002 }
2003
2004 MonoMethod*
2005 mono_method_get_last_managed (void)
2006 {
2007 MonoMethod *m = NULL;
2008 stack_walk (last_managed, FALSE, &m);
2009 return m;
2010 }
2011
2012 static gboolean loader_lock_track_ownership = FALSE;
2013
2014 /**
2015 * mono_loader_lock:
2016 *
2017 * See docs/thread-safety.txt for the locking strategy.
2018 */
2019 void
2020 mono_loader_lock (void)
2021 {
2022 mono_locks_acquire (&loader_mutex, LoaderLock);
2023 if (G_UNLIKELY (loader_lock_track_ownership)) {
2024 TlsSetValue (loader_lock_nest_id, GUINT_TO_POINTER (GPOINTER_TO_UINT (TlsGetValue (loader_lock_nest_id)) + 1));
2025 }
2026 }
2027
2028 void
2029 mono_loader_unlock (void)
2030 {
2031 mono_locks_release (&loader_mutex, LoaderLock);
2032 if (G_UNLIKELY (loader_lock_track_ownership)) {
2033 TlsSetValue (loader_lock_nest_id, GUINT_TO_POINTER (GPOINTER_TO_UINT (TlsGetValue (loader_lock_nest_id)) - 1));
2034 }
2035 }
2036
2037 /*
2038 * mono_loader_lock_track_ownership:
2039 *
2040 * Set whenever the runtime should track ownership of the loader lock. If set to TRUE,
2041 * the mono_loader_lock_is_owned_by_self () can be called to query whenever the current
2042 * thread owns the loader lock.
2043 */
2044 void
2045 mono_loader_lock_track_ownership (gboolean track)
2046 {
2047 loader_lock_track_ownership = track;
2048 }
2049
2050 /*
2051 * mono_loader_lock_is_owned_by_self:
2052 *
2053 * Return whenever the current thread owns the loader lock.
2054 * This is useful to avoid blocking operations while holding the loader lock.
2055 */
2056 gboolean
2057 mono_loader_lock_is_owned_by_self (void)
2058 {
2059 g_assert (loader_lock_track_ownership);
2060
2061 return GPOINTER_TO_UINT (TlsGetValue (loader_lock_nest_id)) > 0;
2062 }
2063
2064 /**
2065 * mono_method_signature:
2066 *
2067 * Return the signature of the method M. On failure, returns NULL, and ERR is set.
2068 */
2069 MonoMethodSignature*
2070 mono_method_signature_checked (MonoMethod *m, MonoError *error)
2071 {
2072 int idx;
2073 int size;
2074 MonoImage* img;
2075 const char *sig;
2076 gboolean can_cache_signature;
2077 MonoGenericContainer *container;
2078 MonoMethodSignature *signature = NULL;
2079 guint32 sig_offset;
2080
2081 /* We need memory barriers below because of the double-checked locking pattern */
2082
2083 mono_error_init (error);
2084
2085 if (m->signature)
2086 return m->signature;
2087
2088 mono_loader_lock ();
2089
2090 if (m->signature) {
2091 mono_loader_unlock ();
2092 return m->signature;
2093 }
2094
2095 if (m->is_inflated) {
2096 MonoMethodInflated *imethod = (MonoMethodInflated *) m;
2097 /* the lock is recursive */
2098 signature = mono_method_signature (imethod->declaring);
2099 signature = inflate_generic_signature (imethod->declaring->klass->image, signature, mono_method_get_context (m));
2100
2101 inflated_signatures_size += mono_metadata_signature_size (signature);
2102
2103 mono_memory_barrier ();
2104 m->signature = signature;
2105 mono_loader_unlock ();
2106 return m->signature;
2107 }
2108
2109 g_assert (mono_metadata_token_table (m->token) == MONO_TABLE_METHOD);
2110 idx = mono_metadata_token_index (m->token);
2111 img = m->klass->image;
2112
2113 sig = mono_metadata_blob_heap (img, sig_offset = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_SIGNATURE));
2114
2115 g_assert (!m->klass->generic_class);
2116 container = mono_method_get_generic_container (m);
2117 if (!container)
2118 container = m->klass->generic_container;
2119
2120 /* Generic signatures depend on the container so they cannot be cached */
2121 /* icall/pinvoke signatures cannot be cached cause we modify them below */
2122 can_cache_signature = !(m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) && !(m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) && !container;
2123
2124 /* If the method has parameter attributes, that can modify the signature */
2125 if (mono_metadata_method_has_param_attrs (img, idx))
2126 can_cache_signature = FALSE;
2127
2128 if (can_cache_signature)
2129 signature = g_hash_table_lookup (img->method_signatures, sig);
2130
2131 if (!signature) {
2132 const char *sig_body;
2133 /*TODO we should cache the failure result somewhere*/
2134 if (!mono_verifier_verify_method_signature (img, sig_offset, NULL)) {
2135 mono_loader_unlock ();
2136 mono_error_set_method_load (error, m->klass, m->name, "");
2137 return NULL;
2138 }
2139
2140 size = mono_metadata_decode_blob_size (sig, &sig_body);
2141
2142 signature = mono_metadata_parse_method_signature_full (img, container, idx, sig_body, NULL);
2143 if (!signature) {
2144 mono_loader_unlock ();
2145 mono_error_set_method_load (error, m->klass, m->name, "");
2146 return NULL;
2147 }
2148
2149 if (can_cache_signature)
2150 g_hash_table_insert (img->method_signatures, (gpointer)sig, signature);
2151 }
2152
2153 /* Verify metadata consistency */
2154 if (signature->generic_param_count) {
2155 if (!container || !container->is_method) {
2156 mono_loader_unlock ();
2157 mono_error_set_method_load (error, m->klass, m->name, "Signature claims method has generic parameters, but generic_params table says it doesn't for method 0x%08x from image %s", idx, img->name);
2158 return NULL;
2159 }
2160 if (container->type_argc != signature->generic_param_count) {
2161 mono_loader_unlock ();
2162 mono_error_set_method_load (error, m->klass, m->name, "Inconsistent generic parameter count. Signature says %d, generic_params table says %d for method 0x%08x from image %s", signature->generic_param_count, container->type_argc, idx, img->name);
2163 return NULL;
2164 }
2165 } else if (container && container->is_method && container->type_argc) {
2166 mono_loader_unlock ();
2167 mono_error_set_method_load (error, m->klass, m->name, "generic_params table claims method has generic parameters, but signature says it doesn't for method 0x%08x from image %s", idx, img->name);
2168 return NULL;
2169 }
2170 if (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)
2171 signature->pinvoke = 1;
2172 else if (m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
2173 MonoCallConvention conv = 0;
2174 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)m;
2175 signature->pinvoke = 1;
2176
2177 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CALL_CONV_MASK) {
2178 case 0: /* no call conv, so using default */
2179 case PINVOKE_ATTRIBUTE_CALL_CONV_WINAPI:
2180 conv = MONO_CALL_DEFAULT;
2181 break;
2182 case PINVOKE_ATTRIBUTE_CALL_CONV_CDECL:
2183 conv = MONO_CALL_C;
2184 break;
2185 case PINVOKE_ATTRIBUTE_CALL_CONV_STDCALL:
2186 conv = MONO_CALL_STDCALL;
2187 break;
2188 case PINVOKE_ATTRIBUTE_CALL_CONV_THISCALL:
2189 conv = MONO_CALL_THISCALL;
2190 break;
2191 case PINVOKE_ATTRIBUTE_CALL_CONV_FASTCALL:
2192 conv = MONO_CALL_FASTCALL;
2193 break;
2194 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERIC:
2195 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERICINST:
2196 default:
2197 mono_loader_unlock ();
2198 mono_error_set_method_load (error, m->klass, m->name, "unsupported calling convention : 0x%04x for method 0x%08x from image %s", piinfo->piflags, idx, img->name);
2199 return NULL;
2200 }
2201 signature->call_convention = conv;
2202 }
2203
2204 mono_memory_barrier ();
2205 m->signature = signature;
2206
2207 mono_loader_unlock ();
2208 return m->signature;
2209 }
2210
2211 /**
2212 * mono_method_signature:
2213 *
2214 * Return the signature of the method M. On failure, returns NULL.
2215 */
2216 MonoMethodSignature*
2217 mono_method_signature (MonoMethod *m)
2218 {
2219 MonoError error;
2220 MonoMethodSignature *sig;
2221
2222 sig = mono_method_signature_checked (m, &error);
2223 if (!sig) {
2224 g_warning ("Could not load signature due to: %s", mono_error_get_message (&error));
2225 mono_error_cleanup (&error);
2226 }
2227
2228 return sig;
2229 }
2230
2231 const char*
2232 mono_method_get_name (MonoMethod *method)
2233 {
2234 return method->name;
2235 }
2236
2237 MonoClass*
2238 mono_method_get_class (MonoMethod *method)
2239 {
2240 return method->klass;
2241 }
2242
2243 guint32
2244 mono_method_get_token (MonoMethod *method)
2245 {
2246 return method->token;
2247 }
2248
2249 MonoMethodHeader*
2250 mono_method_get_header (MonoMethod *method)
2251 {
2252 int idx;
2253 guint32 rva;
2254 MonoImage* img;
2255 gpointer loc;
2256 MonoMethodHeader *header;
2257
2258 if ((method->flags & METHOD_ATTRIBUTE_ABSTRACT) || (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) || (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) || (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
2259 return NULL;
2260
2261 if (method->wrapper_type != MONO_WRAPPER_NONE || method->sre_method) {
2262 MonoMethodWrapper *mw = (MonoMethodWrapper *)method;
2263 g_assert (mw->header);
2264 return mw->header;
2265 }
2266
2267 if (method->is_inflated) {
2268 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
2269 MonoMethodHeader *header;
2270
2271 mono_loader_lock ();
2272
2273 if (imethod->header) {
2274 mono_loader_unlock ();
2275 return imethod->header;
2276 }
2277
2278 header = mono_method_get_header (imethod->declaring);
2279
2280 imethod->header = inflate_generic_header (header, mono_method_get_context (method));
2281 mono_loader_unlock ();
2282 mono_metadata_free_mh (header);
2283 return imethod->header;
2284 }
2285
2286 /*
2287 * We don't need locks here: the new header is allocated from malloc memory
2288 * and is not stored anywhere in the runtime, the user needs to free it.
2289 */
2290 g_assert (mono_metadata_token_table (method->token) == MONO_TABLE_METHOD);
2291 idx = mono_metadata_token_index (method->token);
2292 img = method->klass->image;
2293 rva = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_RVA);
2294
2295 if (!mono_verifier_verify_method_header (img, rva, NULL))
2296 return NULL;
2297
2298 loc = mono_image_rva_map (img, rva);
2299 if (!loc)
2300 return NULL;
2301
2302 header = mono_metadata_parse_mh_full (img, mono_method_get_generic_container (method), loc);
2303
2304 return header;
2305 }
2306
2307 guint32
2308 mono_method_get_flags (MonoMethod *method, guint32 *iflags)
2309 {
2310 if (iflags)
2311 *iflags = method->iflags;
2312 return method->flags;
2313 }
2314
2315 /*
2316 * Find the method index in the metadata methodDef table.
2317 */
2318 guint32
2319 mono_method_get_index (MonoMethod *method) {
2320 MonoClass *klass = method->klass;
2321 int i;
2322
2323 if (method->token)
2324 return mono_metadata_token_index (method->token);
2325
2326 mono_class_setup_methods (klass);
2327 if (klass->exception_type)
2328 return 0;
2329 for (i = 0; i < klass->method.count; ++i) {
2330 if (method == klass->methods [i]) {
2331 if (klass->image->uncompressed_metadata)
2332 return mono_metadata_translate_token_index (klass->image, MONO_TABLE_METHOD, klass->method.first + i + 1);
2333 else
2334 return klass->method.first + i + 1;
2335 }
2336 }
2337 return 0;
2338 }
2339
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