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2010-04-15 Rodrigo Kumpera <rkumpera@novell.com>
[mono.git] / mono / metadata / loader.c
blob8279931397fc3d7c5a0862e27d4abd5ce054cb97
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_checked (MonoImage *image, MonoMethodSignature *sig, MonoGenericContext *context, MonoError *error)
709 {
710 MonoMethodSignature *res;
711 gboolean is_open;
712 int i;
713
714 mono_error_init (error);
715 if (!context)
716 return sig;
717
718 res = g_malloc0 (MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)sig->param_count) * sizeof (MonoType*));
719 res->param_count = sig->param_count;
720 res->sentinelpos = -1;
721 res->ret = mono_class_inflate_generic_type_checked (sig->ret, context, error);
722 if (!mono_error_ok (error))
723 goto fail;
724 is_open = mono_class_is_open_constructed_type (res->ret);
725 for (i = 0; i < sig->param_count; ++i) {
726 res->params [i] = mono_class_inflate_generic_type_checked (sig->params [i], context, error);
727 if (!mono_error_ok (error))
728 goto fail;
729
730 if (!is_open)
731 is_open = mono_class_is_open_constructed_type (res->params [i]);
732 }
733 res->hasthis = sig->hasthis;
734 res->explicit_this = sig->explicit_this;
735 res->call_convention = sig->call_convention;
736 res->pinvoke = sig->pinvoke;
737 res->generic_param_count = sig->generic_param_count;
738 res->sentinelpos = sig->sentinelpos;
739 res->has_type_parameters = is_open;
740 res->is_inflated = 1;
741 return res;
742
743 fail:
744 if (res->ret)
745 mono_metadata_free_type (res->ret);
746 for (i = 0; i < sig->param_count; ++i) {
747 if (res->params [i])
748 mono_metadata_free_type (res->params [i]);
749 }
750 g_free (res);
751 return NULL;
752 }
753
754 static MonoMethodSignature*
755 inflate_generic_signature (MonoImage *image, MonoMethodSignature *sig, MonoGenericContext *context)
756 {
757 MonoError error;
758 MonoMethodSignature *res = inflate_generic_signature_checked (image, sig, context, &error);
759 g_assert (mono_error_ok (&error)); /*FIXME move callers to use _checked version*/
760 return res;
761 }
762
763 static MonoMethodHeader*
764 inflate_generic_header (MonoMethodHeader *header, MonoGenericContext *context)
765 {
766 MonoMethodHeader *res;
767 int i;
768 res = g_malloc0 (MONO_SIZEOF_METHOD_HEADER + sizeof (gpointer) * header->num_locals);
769 res->code = header->code;
770 res->code_size = header->code_size;
771 res->max_stack = header->max_stack;
772 res->num_clauses = header->num_clauses;
773 res->init_locals = header->init_locals;
774 res->num_locals = header->num_locals;
775 res->clauses = header->clauses;
776 for (i = 0; i < header->num_locals; ++i)
777 res->locals [i] = mono_class_inflate_generic_type (header->locals [i], context);
778 if (res->num_clauses) {
779 res->clauses = g_memdup (header->clauses, sizeof (MonoExceptionClause) * res->num_clauses);
780 for (i = 0; i < header->num_clauses; ++i) {
781 MonoExceptionClause *clause = &res->clauses [i];
782 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE)
783 continue;
784 clause->data.catch_class = mono_class_inflate_generic_class (clause->data.catch_class, context);
785 }
786 }
787 return res;
788 }
789
790 /*
791 * token is the method_ref/def/spec token used in a call IL instruction.
792 */
793 MonoMethodSignature*
794 mono_method_get_signature_full (MonoMethod *method, MonoImage *image, guint32 token, MonoGenericContext *context)
795 {
796 int table = mono_metadata_token_table (token);
797 int idx = mono_metadata_token_index (token);
798 int sig_idx;
799 guint32 cols [MONO_MEMBERREF_SIZE];
800 MonoMethodSignature *sig;
801 const char *ptr;
802
803 /* !table is for wrappers: we should really assign their own token to them */
804 if (!table || table == MONO_TABLE_METHOD)
805 return mono_method_signature (method);
806
807 if (table == MONO_TABLE_METHODSPEC) {
808 /* the verifier (do_invoke_method) will turn the NULL into a verifier error */
809 if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) || !method->is_inflated)
810 return NULL;
811
812 return mono_method_signature (method);
813 }
814
815 if (method->klass->generic_class)
816 return mono_method_signature (method);
817
818 if (image->dynamic)
819 /* FIXME: This might be incorrect for vararg methods */
820 return mono_method_signature (method);
821
822 mono_metadata_decode_row (&image->tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
823 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
824
825 sig = find_cached_memberref_sig (image, sig_idx);
826 if (!sig) {
827 if (!mono_verifier_verify_memberref_signature (image, sig_idx, NULL)) {
828 guint32 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
829 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
830
831 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));
832 return NULL;
833 }
834
835 ptr = mono_metadata_blob_heap (image, sig_idx);
836 mono_metadata_decode_blob_size (ptr, &ptr);
837 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
838 if (!sig)
839 return NULL;
840 sig = cache_memberref_sig (image, sig_idx, sig);
841 }
842
843 if (!mono_verifier_is_sig_compatible (image, method, sig)) {
844 guint32 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
845 const char *fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
846
847 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));
848 return NULL;
849 }
850
851 if (context) {
852 MonoError error;
853 MonoMethodSignature *cached;
854
855 /* This signature is not owned by a MonoMethod, so need to cache */
856 sig = inflate_generic_signature_checked (image, sig, context, &error);
857 if (!mono_error_ok (&error)) {/*XXX bubble up this and kill one use of loader errors */
858 mono_loader_set_error_bad_image (g_strdup_printf ("Could not inflate signature %s", mono_error_get_message (&error)));
859 mono_error_cleanup (&error);
860 return NULL;
861 }
862
863 cached = mono_metadata_get_inflated_signature (sig, context);
864 if (cached != sig)
865 mono_metadata_free_inflated_signature (sig);
866 else
867 inflated_signatures_size += mono_metadata_signature_size (cached);
868 sig = cached;
869 }
870
871 return sig;
872 }
873
874 MonoMethodSignature*
875 mono_method_get_signature (MonoMethod *method, MonoImage *image, guint32 token)
876 {
877 return mono_method_get_signature_full (method, image, token, NULL);
878 }
879
880 /* this is only for the typespec array methods */
881 MonoMethod*
882 mono_method_search_in_array_class (MonoClass *klass, const char *name, MonoMethodSignature *sig)
883 {
884 int i;
885
886 mono_class_setup_methods (klass);
887 g_assert (!klass->exception_type); /*FIXME this should not fail, right?*/
888 for (i = 0; i < klass->method.count; ++i) {
889 MonoMethod *method = klass->methods [i];
890 if (strcmp (method->name, name) == 0 && sig->param_count == method->signature->param_count)
891 return method;
892 }
893 return NULL;
894 }
895
896 static MonoMethod *
897 method_from_memberref (MonoImage *image, guint32 idx, MonoGenericContext *typespec_context,
898 gboolean *used_context)
899 {
900 MonoClass *klass = NULL;
901 MonoMethod *method = NULL;
902 MonoTableInfo *tables = image->tables;
903 guint32 cols[6];
904 guint32 nindex, class, sig_idx;
905 const char *mname;
906 MonoMethodSignature *sig;
907 const char *ptr;
908
909 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
910 nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
911 class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
912 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
913 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
914
915 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
916
917 /*
918 * Whether we actually used the `typespec_context' or not.
919 * This is used to tell our caller whether or not it's safe to insert the returned
920 * method into a cache.
921 */
922 if (used_context)
923 *used_context = class == MONO_MEMBERREF_PARENT_TYPESPEC;
924
925 switch (class) {
926 case MONO_MEMBERREF_PARENT_TYPEREF:
927 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
928 if (!klass) {
929 char *name = mono_class_name_from_token (image, MONO_TOKEN_TYPE_REF | nindex);
930 g_warning ("Missing method %s in assembly %s, type %s", mname, image->name, name);
931 mono_loader_set_error_type_load (name, image->assembly_name);
932 g_free (name);
933 return NULL;
934 }
935 break;
936 case MONO_MEMBERREF_PARENT_TYPESPEC:
937 /*
938 * Parse the TYPESPEC in the parent's context.
939 */
940 klass = mono_class_get_full (image, MONO_TOKEN_TYPE_SPEC | nindex, typespec_context);
941 if (!klass) {
942 char *name = mono_class_name_from_token (image, MONO_TOKEN_TYPE_SPEC | nindex);
943 g_warning ("Missing method %s in assembly %s, type %s", mname, image->name, name);
944 mono_loader_set_error_type_load (name, image->assembly_name);
945 g_free (name);
946 return NULL;
947 }
948 break;
949 case MONO_MEMBERREF_PARENT_TYPEDEF:
950 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | nindex);
951 if (!klass) {
952 char *name = mono_class_name_from_token (image, MONO_TOKEN_TYPE_DEF | nindex);
953 g_warning ("Missing method %s in assembly %s, type %s", mname, image->name, name);
954 mono_loader_set_error_type_load (name, image->assembly_name);
955 g_free (name);
956 return NULL;
957 }
958 break;
959 case MONO_MEMBERREF_PARENT_METHODDEF:
960 return mono_get_method (image, MONO_TOKEN_METHOD_DEF | nindex, NULL);
961
962 default:
963 {
964 /* This message leaks */
965 char *message = g_strdup_printf ("Memberref parent unknown: class: %d, index %d", class, nindex);
966 mono_loader_set_error_method_load ("", message);
967 return NULL;
968 }
969
970 }
971 g_assert (klass);
972 mono_class_init (klass);
973
974 sig_idx = cols [MONO_MEMBERREF_SIGNATURE];
975
976 if (!mono_verifier_verify_memberref_signature (image, sig_idx, NULL)) {
977 mono_loader_set_error_method_load (klass->name, mname);
978 return NULL;
979 }
980
981 ptr = mono_metadata_blob_heap (image, sig_idx);
982 mono_metadata_decode_blob_size (ptr, &ptr);
983
984 sig = find_cached_memberref_sig (image, sig_idx);
985 if (!sig) {
986 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
987 if (sig == NULL)
988 return NULL;
989
990 sig = cache_memberref_sig (image, sig_idx, sig);
991 }
992
993 switch (class) {
994 case MONO_MEMBERREF_PARENT_TYPEREF:
995 case MONO_MEMBERREF_PARENT_TYPEDEF:
996 method = find_method (klass, NULL, mname, sig, klass);
997 break;
998
999 case MONO_MEMBERREF_PARENT_TYPESPEC: {
1000 MonoType *type;
1001
1002 type = &klass->byval_arg;
1003
1004 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
1005 MonoClass *in_class = klass->generic_class ? klass->generic_class->container_class : klass;
1006 method = find_method (in_class, NULL, mname, sig, klass);
1007 break;
1008 }
1009
1010 /* we're an array and we created these methods already in klass in mono_class_init () */
1011 method = mono_method_search_in_array_class (klass, mname, sig);
1012 break;
1013 }
1014 default:
1015 g_error ("Memberref parent unknown: class: %d, index %d", class, nindex);
1016 g_assert_not_reached ();
1017 }
1018
1019 if (!method) {
1020 char *msig = mono_signature_get_desc (sig, FALSE);
1021 char * class_name = mono_type_get_name (&klass->byval_arg);
1022 GString *s = g_string_new (mname);
1023 if (sig->generic_param_count)
1024 g_string_append_printf (s, "<[%d]>", sig->generic_param_count);
1025 g_string_append_printf (s, "(%s)", msig);
1026 g_free (msig);
1027 msig = g_string_free (s, FALSE);
1028
1029 g_warning (
1030 "Missing method %s::%s in assembly %s, referenced in assembly %s",
1031 class_name, msig, klass->image->name, image->name);
1032 mono_loader_set_error_method_load (class_name, mname);
1033 g_free (msig);
1034 g_free (class_name);
1035 }
1036
1037 return method;
1038 }
1039
1040 static MonoMethod *
1041 method_from_methodspec (MonoImage *image, MonoGenericContext *context, guint32 idx)
1042 {
1043 MonoError error;
1044 MonoMethod *method;
1045 MonoClass *klass;
1046 MonoTableInfo *tables = image->tables;
1047 MonoGenericContext new_context;
1048 MonoGenericInst *inst;
1049 const char *ptr;
1050 guint32 cols [MONO_METHODSPEC_SIZE];
1051 guint32 token, nindex, param_count;
1052
1053 mono_metadata_decode_row (&tables [MONO_TABLE_METHODSPEC], idx - 1, cols, MONO_METHODSPEC_SIZE);
1054 token = cols [MONO_METHODSPEC_METHOD];
1055 nindex = token >> MONO_METHODDEFORREF_BITS;
1056
1057 if (!mono_verifier_verify_methodspec_signature (image, cols [MONO_METHODSPEC_SIGNATURE], NULL))
1058 return NULL;
1059
1060 ptr = mono_metadata_blob_heap (image, cols [MONO_METHODSPEC_SIGNATURE]);
1061
1062 mono_metadata_decode_value (ptr, &ptr);
1063 ptr++;
1064 param_count = mono_metadata_decode_value (ptr, &ptr);
1065 g_assert (param_count);
1066
1067 inst = mono_metadata_parse_generic_inst (image, NULL, param_count, ptr, &ptr);
1068 if (context && inst->is_open) {
1069 inst = mono_metadata_inflate_generic_inst (inst, context, &error);
1070 if (!mono_error_ok (&error)) {
1071 mono_error_cleanup (&error); /*FIXME don't swallow error message.*/
1072 return NULL;
1073 }
1074 }
1075
1076 if ((token & MONO_METHODDEFORREF_MASK) == MONO_METHODDEFORREF_METHODDEF)
1077 method = mono_get_method_full (image, MONO_TOKEN_METHOD_DEF | nindex, NULL, context);
1078 else
1079 method = method_from_memberref (image, nindex, context, NULL);
1080
1081 if (!method)
1082 return NULL;
1083
1084 klass = method->klass;
1085
1086 if (klass->generic_class) {
1087 g_assert (method->is_inflated);
1088 method = ((MonoMethodInflated *) method)->declaring;
1089 }
1090
1091 new_context.class_inst = klass->generic_class ? klass->generic_class->context.class_inst : NULL;
1092 new_context.method_inst = inst;
1093
1094 return mono_class_inflate_generic_method_full (method, klass, &new_context);
1095 }
1096
1097 struct _MonoDllMap {
1098 char *dll;
1099 char *target;
1100 char *func;
1101 char *target_func;
1102 MonoDllMap *next;
1103 };
1104
1105 static MonoDllMap *global_dll_map;
1106
1107 static int
1108 mono_dllmap_lookup_list (MonoDllMap *dll_map, const char *dll, const char* func, const char **rdll, const char **rfunc) {
1109 int found = 0;
1110
1111 *rdll = dll;
1112
1113 if (!dll_map)
1114 return 0;
1115
1116 mono_loader_lock ();
1117
1118 /*
1119 * we use the first entry we find that matches, since entries from
1120 * the config file are prepended to the list and we document that the
1121 * later entries win.
1122 */
1123 for (; dll_map; dll_map = dll_map->next) {
1124 if (dll_map->dll [0] == 'i' && dll_map->dll [1] == ':') {
1125 if (g_ascii_strcasecmp (dll_map->dll + 2, dll))
1126 continue;
1127 } else if (strcmp (dll_map->dll, dll)) {
1128 continue;
1129 }
1130 if (!found && dll_map->target) {
1131 *rdll = dll_map->target;
1132 found = 1;
1133 /* we don't quit here, because we could find a full
1134 * entry that matches also function and that has priority.
1135 */
1136 }
1137 if (dll_map->func && strcmp (dll_map->func, func) == 0) {
1138 *rfunc = dll_map->target_func;
1139 break;
1140 }
1141 }
1142
1143 mono_loader_unlock ();
1144 return found;
1145 }
1146
1147 static int
1148 mono_dllmap_lookup (MonoImage *assembly, const char *dll, const char* func, const char **rdll, const char **rfunc)
1149 {
1150 int res;
1151 if (assembly && assembly->dll_map) {
1152 res = mono_dllmap_lookup_list (assembly->dll_map, dll, func, rdll, rfunc);
1153 if (res)
1154 return res;
1155 }
1156 return mono_dllmap_lookup_list (global_dll_map, dll, func, rdll, rfunc);
1157 }
1158
1159 /*
1160 * mono_dllmap_insert:
1161 *
1162 * LOCKING: Acquires the loader lock.
1163 *
1164 * NOTE: This can be called before the runtime is initialized, for example from
1165 * mono_config_parse ().
1166 */
1167 void
1168 mono_dllmap_insert (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfunc)
1169 {
1170 MonoDllMap *entry;
1171
1172 mono_loader_init ();
1173
1174 mono_loader_lock ();
1175
1176 if (!assembly) {
1177 entry = g_malloc0 (sizeof (MonoDllMap));
1178 entry->dll = dll? g_strdup (dll): NULL;
1179 entry->target = tdll? g_strdup (tdll): NULL;
1180 entry->func = func? g_strdup (func): NULL;
1181 entry->target_func = tfunc? g_strdup (tfunc): NULL;
1182 entry->next = global_dll_map;
1183 global_dll_map = entry;
1184 } else {
1185 entry = mono_image_alloc0 (assembly, sizeof (MonoDllMap));
1186 entry->dll = dll? mono_image_strdup (assembly, dll): NULL;
1187 entry->target = tdll? mono_image_strdup (assembly, tdll): NULL;
1188 entry->func = func? mono_image_strdup (assembly, func): NULL;
1189 entry->target_func = tfunc? mono_image_strdup (assembly, tfunc): NULL;
1190 entry->next = assembly->dll_map;
1191 assembly->dll_map = entry;
1192 }
1193
1194 mono_loader_unlock ();
1195 }
1196
1197 static GHashTable *global_module_map;
1198
1199 static MonoDl*
1200 cached_module_load (const char *name, int flags, char **err)
1201 {
1202 MonoDl *res;
1203
1204 if (err)
1205 *err = NULL;
1206 mono_loader_lock ();
1207 if (!global_module_map)
1208 global_module_map = g_hash_table_new (g_str_hash, g_str_equal);
1209 res = g_hash_table_lookup (global_module_map, name);
1210 if (res) {
1211 mono_loader_unlock ();
1212 return res;
1213 }
1214 res = mono_dl_open (name, flags, NULL);
1215 if (res)
1216 g_hash_table_insert (global_module_map, g_strdup (name), res);
1217 mono_loader_unlock ();
1218 return res;
1219 }
1220
1221 gpointer
1222 mono_lookup_pinvoke_call (MonoMethod *method, const char **exc_class, const char **exc_arg)
1223 {
1224 MonoImage *image = method->klass->image;
1225 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
1226 MonoTableInfo *tables = image->tables;
1227 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
1228 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
1229 guint32 im_cols [MONO_IMPLMAP_SIZE];
1230 guint32 scope_token;
1231 const char *import = NULL;
1232 const char *orig_scope;
1233 const char *new_scope;
1234 char *error_msg;
1235 char *full_name, *file_name;
1236 int i;
1237 MonoDl *module = NULL;
1238
1239 g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
1240
1241 if (piinfo->addr)
1242 return piinfo->addr;
1243
1244 if (method->klass->image->dynamic) {
1245 MonoReflectionMethodAux *method_aux =
1246 g_hash_table_lookup (
1247 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1248 if (!method_aux)
1249 return NULL;
1250
1251 import = method_aux->dllentry;
1252 orig_scope = method_aux->dll;
1253 }
1254 else {
1255 if (!piinfo->implmap_idx)
1256 return NULL;
1257
1258 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
1259
1260 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
1261 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
1262 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
1263 orig_scope = mono_metadata_string_heap (image, scope_token);
1264 }
1265
1266 mono_dllmap_lookup (image, orig_scope, import, &new_scope, &import);
1267
1268 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1269 "DllImport attempting to load: '%s'.", new_scope);
1270
1271 if (exc_class) {
1272 *exc_class = NULL;
1273 *exc_arg = NULL;
1274 }
1275
1276 /* we allow a special name to dlopen from the running process namespace */
1277 if (strcmp (new_scope, "__Internal") == 0)
1278 module = mono_dl_open (NULL, MONO_DL_LAZY, &error_msg);
1279
1280 /*
1281 * Try loading the module using a variety of names
1282 */
1283 for (i = 0; i < 4; ++i) {
1284 switch (i) {
1285 case 0:
1286 /* Try the original name */
1287 file_name = g_strdup (new_scope);
1288 break;
1289 case 1:
1290 /* Try trimming the .dll extension */
1291 if (strstr (new_scope, ".dll") == (new_scope + strlen (new_scope) - 4)) {
1292 file_name = g_strdup (new_scope);
1293 file_name [strlen (new_scope) - 4] = '\0';
1294 }
1295 else
1296 continue;
1297 break;
1298 case 2:
1299 if (strstr (new_scope, "lib") != new_scope) {
1300 file_name = g_strdup_printf ("lib%s", new_scope);
1301 }
1302 else
1303 continue;
1304 break;
1305 default:
1306 #ifndef TARGET_WIN32
1307 if (!g_ascii_strcasecmp ("user32.dll", new_scope) ||
1308 !g_ascii_strcasecmp ("kernel32.dll", new_scope) ||
1309 !g_ascii_strcasecmp ("user32", new_scope) ||
1310 !g_ascii_strcasecmp ("kernel", new_scope)) {
1311 file_name = g_strdup ("libMonoSupportW.so");
1312 } else
1313 #endif
1314 continue;
1315 #ifndef TARGET_WIN32
1316 break;
1317 #endif
1318 }
1319
1320 if (!module) {
1321 void *iter = NULL;
1322 while ((full_name = mono_dl_build_path (NULL, file_name, &iter))) {
1323 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1324 "DllImport loading location: '%s'.", full_name);
1325 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1326 if (!module) {
1327 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1328 "DllImport error loading library: '%s'.",
1329 error_msg);
1330 g_free (error_msg);
1331 }
1332 g_free (full_name);
1333 if (module)
1334 break;
1335 }
1336 }
1337
1338 if (!module) {
1339 void *iter = NULL;
1340 while ((full_name = mono_dl_build_path (".", file_name, &iter))) {
1341 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1342 "DllImport loading library: '%s'.", full_name);
1343 module = cached_module_load (full_name, MONO_DL_LAZY, &error_msg);
1344 if (!module) {
1345 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1346 "DllImport error loading library '%s'.",
1347 error_msg);
1348 g_free (error_msg);
1349 }
1350 g_free (full_name);
1351 if (module)
1352 break;
1353 }
1354 }
1355
1356 if (!module) {
1357 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1358 "DllImport loading: '%s'.", file_name);
1359 module = cached_module_load (file_name, MONO_DL_LAZY, &error_msg);
1360 if (!module) {
1361 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1362 "DllImport error loading library '%s'.",
1363 error_msg);
1364 }
1365 }
1366
1367 g_free (file_name);
1368
1369 if (module)
1370 break;
1371 }
1372
1373 if (!module) {
1374 mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_DLLIMPORT,
1375 "DllImport unable to load library '%s'.",
1376 error_msg);
1377 g_free (error_msg);
1378
1379 if (exc_class) {
1380 *exc_class = "DllNotFoundException";
1381 *exc_arg = new_scope;
1382 }
1383 return NULL;
1384 }
1385
1386 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1387 "Searching for '%s'.", import);
1388
1389 if (piinfo->piflags & PINVOKE_ATTRIBUTE_NO_MANGLE) {
1390 error_msg = mono_dl_symbol (module, import, &piinfo->addr);
1391 } else {
1392 char *mangled_name = NULL, *mangled_name2 = NULL;
1393 int mangle_charset;
1394 int mangle_stdcall;
1395 int mangle_param_count;
1396 #ifdef TARGET_WIN32
1397 int param_count;
1398 #endif
1399
1400 /*
1401 * Search using a variety of mangled names
1402 */
1403 for (mangle_charset = 0; mangle_charset <= 1; mangle_charset ++) {
1404 for (mangle_stdcall = 0; mangle_stdcall <= 1; mangle_stdcall ++) {
1405 gboolean need_param_count = FALSE;
1406 #ifdef TARGET_WIN32
1407 if (mangle_stdcall > 0)
1408 need_param_count = TRUE;
1409 #endif
1410 for (mangle_param_count = 0; mangle_param_count <= (need_param_count ? 256 : 0); mangle_param_count += 4) {
1411
1412 if (piinfo->addr)
1413 continue;
1414
1415 mangled_name = (char*)import;
1416 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CHAR_SET_MASK) {
1417 case PINVOKE_ATTRIBUTE_CHAR_SET_UNICODE:
1418 /* Try the mangled name first */
1419 if (mangle_charset == 0)
1420 mangled_name = g_strconcat (import, "W", NULL);
1421 break;
1422 case PINVOKE_ATTRIBUTE_CHAR_SET_AUTO:
1423 #ifdef TARGET_WIN32
1424 if (mangle_charset == 0)
1425 mangled_name = g_strconcat (import, "W", NULL);
1426 #else
1427 /* Try the mangled name last */
1428 if (mangle_charset == 1)
1429 mangled_name = g_strconcat (import, "A", NULL);
1430 #endif
1431 break;
1432 case PINVOKE_ATTRIBUTE_CHAR_SET_ANSI:
1433 default:
1434 /* Try the mangled name last */
1435 if (mangle_charset == 1)
1436 mangled_name = g_strconcat (import, "A", NULL);
1437 break;
1438 }
1439
1440 #ifdef TARGET_WIN32
1441 if (mangle_param_count == 0)
1442 param_count = mono_method_signature (method)->param_count * sizeof (gpointer);
1443 else
1444 /* Try brute force, since it would be very hard to compute the stack usage correctly */
1445 param_count = mangle_param_count;
1446
1447 /* Try the stdcall mangled name */
1448 /*
1449 * gcc under windows creates mangled names without the underscore, but MS.NET
1450 * doesn't support it, so we doesn't support it either.
1451 */
1452 if (mangle_stdcall == 1)
1453 mangled_name2 = g_strdup_printf ("_%s@%d", mangled_name, param_count);
1454 else
1455 mangled_name2 = mangled_name;
1456 #else
1457 mangled_name2 = mangled_name;
1458 #endif
1459
1460 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1461 "Probing '%s'.", mangled_name2);
1462
1463 error_msg = mono_dl_symbol (module, mangled_name2, &piinfo->addr);
1464
1465 if (piinfo->addr)
1466 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
1467 "Found as '%s'.", mangled_name2);
1468
1469 if (mangled_name != mangled_name2)
1470 g_free (mangled_name2);
1471 if (mangled_name != import)
1472 g_free (mangled_name);
1473 }
1474 }
1475 }
1476 }
1477
1478 if (!piinfo->addr) {
1479 g_free (error_msg);
1480 if (exc_class) {
1481 *exc_class = "EntryPointNotFoundException";
1482 *exc_arg = import;
1483 }
1484 return NULL;
1485 }
1486 return piinfo->addr;
1487 }
1488
1489 /*
1490 * LOCKING: assumes the loader lock to be taken.
1491 */
1492 static MonoMethod *
1493 mono_get_method_from_token (MonoImage *image, guint32 token, MonoClass *klass,
1494 MonoGenericContext *context, gboolean *used_context)
1495 {
1496 MonoMethod *result;
1497 int table = mono_metadata_token_table (token);
1498 int idx = mono_metadata_token_index (token);
1499 MonoTableInfo *tables = image->tables;
1500 MonoGenericContainer *generic_container = NULL, *container = NULL;
1501 const char *sig = NULL;
1502 int size;
1503 guint32 cols [MONO_TYPEDEF_SIZE];
1504
1505 if (image->dynamic) {
1506 MonoClass *handle_class;
1507
1508 result = mono_lookup_dynamic_token_class (image, token, TRUE, &handle_class, context);
1509 // This checks the memberref type as well
1510 if (result && handle_class != mono_defaults.methodhandle_class) {
1511 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method token 0x%08x on image %s.", token, image->name));
1512 return NULL;
1513 }
1514 return result;
1515 }
1516
1517 if (table != MONO_TABLE_METHOD) {
1518 if (table == MONO_TABLE_METHODSPEC) {
1519 if (used_context) *used_context = TRUE;
1520 return method_from_methodspec (image, context, idx);
1521 }
1522 if (table != MONO_TABLE_MEMBERREF) {
1523 g_warning ("got wrong token: 0x%08x\n", token);
1524 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method token 0x%08x on image %s.", token, image->name));
1525 return NULL;
1526 }
1527 return method_from_memberref (image, idx, context, used_context);
1528 }
1529
1530 if (used_context) *used_context = FALSE;
1531
1532 if (idx > image->tables [MONO_TABLE_METHOD].rows) {
1533 mono_loader_set_error_bad_image (g_strdup_printf ("Bad method token 0x%08x on image %s.", token, image->name));
1534 return NULL;
1535 }
1536
1537 mono_metadata_decode_row (&image->tables [MONO_TABLE_METHOD], idx - 1, cols, 6);
1538
1539 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1540 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
1541 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethodPInvoke));
1542 else
1543 result = (MonoMethod *)mono_image_alloc0 (image, sizeof (MonoMethod));
1544
1545 mono_stats.method_count ++;
1546
1547 if (!klass) { /*FIXME put this before the image alloc*/
1548 guint32 type = mono_metadata_typedef_from_method (image, token);
1549 if (!type)
1550 return NULL;
1551 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
1552 if (klass == NULL)
1553 return NULL;
1554 }
1555
1556 result->slot = -1;
1557 result->klass = klass;
1558 result->flags = cols [2];
1559 result->iflags = cols [1];
1560 result->token = token;
1561 result->name = mono_metadata_string_heap (image, cols [3]);
1562
1563 if (!sig) /* already taken from the methodref */
1564 sig = mono_metadata_blob_heap (image, cols [4]);
1565 size = mono_metadata_decode_blob_size (sig, &sig);
1566
1567 container = klass->generic_container;
1568
1569 /*
1570 * load_generic_params does a binary search so only call it if the method
1571 * is generic.
1572 */
1573 if (*sig & 0x10)
1574 generic_container = mono_metadata_load_generic_params (image, token, container);
1575 if (generic_container) {
1576 result->is_generic = TRUE;
1577 generic_container->owner.method = result;
1578 /*FIXME put this before the image alloc*/
1579 if (!mono_metadata_load_generic_param_constraints_full (image, token, generic_container))
1580 return NULL;
1581
1582 container = generic_container;
1583 }
1584
1585 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
1586 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
1587 result->string_ctor = 1;
1588 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
1589 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)result;
1590
1591 #ifdef TARGET_WIN32
1592 /* IJW is P/Invoke with a predefined function pointer. */
1593 if (image->is_module_handle && (cols [1] & METHOD_IMPL_ATTRIBUTE_NATIVE)) {
1594 piinfo->addr = mono_image_rva_map (image, cols [0]);
1595 g_assert (piinfo->addr);
1596 }
1597 #endif
1598 piinfo->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
1599 /* Native methods can have no map. */
1600 if (piinfo->implmap_idx)
1601 piinfo->piflags = mono_metadata_decode_row_col (&tables [MONO_TABLE_IMPLMAP], piinfo->implmap_idx - 1, MONO_IMPLMAP_FLAGS);
1602 }
1603
1604 if (generic_container)
1605 mono_method_set_generic_container (result, generic_container);
1606
1607 return result;
1608 }
1609
1610 MonoMethod *
1611 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
1612 {
1613 return mono_get_method_full (image, token, klass, NULL);
1614 }
1615
1616 MonoMethod *
1617 mono_get_method_full (MonoImage *image, guint32 token, MonoClass *klass,
1618 MonoGenericContext *context)
1619 {
1620 MonoMethod *result;
1621 gboolean used_context = FALSE;
1622
1623 /* We do everything inside the lock to prevent creation races */
1624
1625 mono_image_lock (image);
1626
1627 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD) {
1628 if (!image->method_cache)
1629 image->method_cache = g_hash_table_new (NULL, NULL);
1630 result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
1631 } else {
1632 if (!image->methodref_cache)
1633 image->methodref_cache = g_hash_table_new (NULL, NULL);
1634 result = g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
1635 }
1636 mono_image_unlock (image);
1637
1638 if (result)
1639 return result;
1640
1641 result = mono_get_method_from_token (image, token, klass, context, &used_context);
1642 if (!result)
1643 return NULL;
1644
1645 mono_image_lock (image);
1646 if (!used_context && !result->is_inflated) {
1647 MonoMethod *result2;
1648 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
1649 result2 = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)));
1650 else
1651 result2 = g_hash_table_lookup (image->methodref_cache, GINT_TO_POINTER (token));
1652
1653 if (result2) {
1654 mono_image_unlock (image);
1655 return result2;
1656 }
1657
1658 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
1659 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (mono_metadata_token_index (token)), result);
1660 else
1661 g_hash_table_insert (image->methodref_cache, GINT_TO_POINTER (token), result);
1662 }
1663
1664 mono_image_unlock (image);
1665
1666 return result;
1667 }
1668
1669 /**
1670 * mono_get_method_constrained:
1671 *
1672 * This is used when JITing the `constrained.' opcode.
1673 *
1674 * This returns two values: the contrained method, which has been inflated
1675 * as the function return value; And the original CIL-stream method as
1676 * declared in cil_method. The later is used for verification.
1677 */
1678 MonoMethod *
1679 mono_get_method_constrained (MonoImage *image, guint32 token, MonoClass *constrained_class,
1680 MonoGenericContext *context, MonoMethod **cil_method)
1681 {
1682 MonoMethod *method, *result;
1683 MonoClass *ic = NULL;
1684 MonoGenericContext *method_context = NULL;
1685 MonoMethodSignature *sig, *original_sig;
1686
1687 mono_loader_lock ();
1688
1689 *cil_method = mono_get_method_from_token (image, token, NULL, context, NULL);
1690 if (!*cil_method) {
1691 mono_loader_unlock ();
1692 return NULL;
1693 }
1694
1695 mono_class_init (constrained_class);
1696 method = *cil_method;
1697 original_sig = sig = mono_method_signature (method);
1698 if (sig == NULL)
1699 return NULL;
1700
1701 if (method->is_inflated && sig->generic_param_count) {
1702 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
1703 sig = mono_method_signature (imethod->declaring); /*We assume that if the inflated method signature is valid, the declaring method is too*/
1704 method_context = mono_method_get_context (method);
1705
1706 original_sig = sig;
1707 /*
1708 * We must inflate the signature with the class instantiation to work on
1709 * cases where a class inherit from a generic type and the override replaces
1710 * any type argument which a concrete type. See #325283.
1711 */
1712 if (method_context->class_inst) {
1713 MonoGenericContext ctx;
1714 ctx.method_inst = NULL;
1715 ctx.class_inst = method_context->class_inst;
1716
1717 sig = inflate_generic_signature (method->klass->image, sig, &ctx);
1718 if (sig == NULL)
1719 return NULL;
1720 }
1721 }
1722
1723 if ((constrained_class != method->klass) && (MONO_CLASS_IS_INTERFACE (method->klass)))
1724 ic = method->klass;
1725
1726 result = find_method (constrained_class, ic, method->name, sig, constrained_class);
1727 if (sig != original_sig)
1728 mono_metadata_free_inflated_signature (sig);
1729
1730 if (!result) {
1731 g_warning ("Missing method %s.%s.%s in assembly %s token %x", method->klass->name_space,
1732 method->klass->name, method->name, image->name, token);
1733 mono_loader_unlock ();
1734 return NULL;
1735 }
1736
1737 if (method_context)
1738 result = mono_class_inflate_generic_method (result, method_context);
1739
1740 mono_loader_unlock ();
1741 return result;
1742 }
1743
1744 void
1745 mono_free_method (MonoMethod *method)
1746 {
1747 if (mono_profiler_get_events () & MONO_PROFILE_METHOD_EVENTS)
1748 mono_profiler_method_free (method);
1749
1750 /* FIXME: This hack will go away when the profiler will support freeing methods */
1751 if (mono_profiler_get_events () != MONO_PROFILE_NONE)
1752 return;
1753
1754 if (method->signature) {
1755 /*
1756 * FIXME: This causes crashes because the types inside signatures and
1757 * locals are shared.
1758 */
1759 /* mono_metadata_free_method_signature (method->signature); */
1760 /* g_free (method->signature); */
1761 }
1762
1763 if (method->dynamic) {
1764 MonoMethodWrapper *mw = (MonoMethodWrapper*)method;
1765 int i;
1766
1767 mono_marshal_free_dynamic_wrappers (method);
1768
1769 mono_image_property_remove (method->klass->image, method);
1770
1771 g_free ((char*)method->name);
1772 if (mw->header) {
1773 g_free ((char*)mw->header->code);
1774 for (i = 0; i < mw->header->num_locals; ++i)
1775 g_free (mw->header->locals [i]);
1776 g_free (mw->header->clauses);
1777 g_free (mw->header);
1778 }
1779 g_free (mw->method_data);
1780 g_free (method->signature);
1781 g_free (method);
1782 }
1783 }
1784
1785 void
1786 mono_method_get_param_names (MonoMethod *method, const char **names)
1787 {
1788 int i, lastp;
1789 MonoClass *klass;
1790 MonoTableInfo *methodt;
1791 MonoTableInfo *paramt;
1792 MonoMethodSignature *signature;
1793 guint32 idx;
1794
1795 if (method->is_inflated)
1796 method = ((MonoMethodInflated *) method)->declaring;
1797
1798 signature = mono_method_signature (method);
1799 /*FIXME this check is somewhat redundant since the caller usally will have to get the signature to figure out the
1800 number of arguments and allocate a properly sized array. */
1801 if (signature == NULL)
1802 return;
1803
1804 if (!signature->param_count)
1805 return;
1806
1807 for (i = 0; i < signature->param_count; ++i)
1808 names [i] = "";
1809
1810 klass = method->klass;
1811 if (klass->rank)
1812 return;
1813
1814 mono_class_init (klass);
1815
1816 if (klass->image->dynamic) {
1817 MonoReflectionMethodAux *method_aux =
1818 g_hash_table_lookup (
1819 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1820 if (method_aux && method_aux->param_names) {
1821 for (i = 0; i < mono_method_signature (method)->param_count; ++i)
1822 if (method_aux->param_names [i + 1])
1823 names [i] = method_aux->param_names [i + 1];
1824 }
1825 return;
1826 }
1827
1828 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1829 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1830 idx = mono_method_get_index (method);
1831 if (idx > 0) {
1832 guint32 cols [MONO_PARAM_SIZE];
1833 guint param_index;
1834
1835 param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1836
1837 if (idx < methodt->rows)
1838 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1839 else
1840 lastp = paramt->rows + 1;
1841 for (i = param_index; i < lastp; ++i) {
1842 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1843 if (cols [MONO_PARAM_SEQUENCE] && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) /* skip return param spec and bounds check*/
1844 names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass->image, cols [MONO_PARAM_NAME]);
1845 }
1846 }
1847 }
1848
1849 guint32
1850 mono_method_get_param_token (MonoMethod *method, int index)
1851 {
1852 MonoClass *klass = method->klass;
1853 MonoTableInfo *methodt;
1854 guint32 idx;
1855
1856 mono_class_init (klass);
1857
1858 if (klass->image->dynamic) {
1859 g_assert_not_reached ();
1860 }
1861
1862 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1863 idx = mono_method_get_index (method);
1864 if (idx > 0) {
1865 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1866
1867 if (index == -1)
1868 /* Return value */
1869 return mono_metadata_make_token (MONO_TABLE_PARAM, 0);
1870 else
1871 return mono_metadata_make_token (MONO_TABLE_PARAM, param_index + index);
1872 }
1873
1874 return 0;
1875 }
1876
1877 void
1878 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
1879 {
1880 int i, lastp;
1881 MonoClass *klass = method->klass;
1882 MonoTableInfo *methodt;
1883 MonoTableInfo *paramt;
1884 MonoMethodSignature *signature;
1885 guint32 idx;
1886
1887 signature = mono_method_signature (method);
1888 g_assert (signature); /*FIXME there is no way to signal error from this function*/
1889
1890 for (i = 0; i < signature->param_count + 1; ++i)
1891 mspecs [i] = NULL;
1892
1893 if (method->klass->image->dynamic) {
1894 MonoReflectionMethodAux *method_aux =
1895 g_hash_table_lookup (
1896 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1897 if (method_aux && method_aux->param_marshall) {
1898 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
1899 for (i = 0; i < signature->param_count + 1; ++i)
1900 if (dyn_specs [i]) {
1901 mspecs [i] = g_new0 (MonoMarshalSpec, 1);
1902 memcpy (mspecs [i], dyn_specs [i], sizeof (MonoMarshalSpec));
1903 mspecs [i]->data.custom_data.custom_name = g_strdup (dyn_specs [i]->data.custom_data.custom_name);
1904 mspecs [i]->data.custom_data.cookie = g_strdup (dyn_specs [i]->data.custom_data.cookie);
1905 }
1906 }
1907 return;
1908 }
1909
1910 mono_class_init (klass);
1911
1912 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1913 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1914 idx = mono_method_get_index (method);
1915 if (idx > 0) {
1916 guint32 cols [MONO_PARAM_SIZE];
1917 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1918
1919 if (idx < methodt->rows)
1920 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1921 else
1922 lastp = paramt->rows + 1;
1923
1924 for (i = param_index; i < lastp; ++i) {
1925 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1926
1927 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL && cols [MONO_PARAM_SEQUENCE] <= signature->param_count) {
1928 const char *tp;
1929 tp = mono_metadata_get_marshal_info (klass->image, i - 1, FALSE);
1930 g_assert (tp);
1931 mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass->image, tp);
1932 }
1933 }
1934
1935 return;
1936 }
1937 }
1938
1939 gboolean
1940 mono_method_has_marshal_info (MonoMethod *method)
1941 {
1942 int i, lastp;
1943 MonoClass *klass = method->klass;
1944 MonoTableInfo *methodt;
1945 MonoTableInfo *paramt;
1946 guint32 idx;
1947
1948 if (method->klass->image->dynamic) {
1949 MonoReflectionMethodAux *method_aux =
1950 g_hash_table_lookup (
1951 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1952 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
1953 if (dyn_specs) {
1954 for (i = 0; i < mono_method_signature (method)->param_count + 1; ++i)
1955 if (dyn_specs [i])
1956 return TRUE;
1957 }
1958 return FALSE;
1959 }
1960
1961 mono_class_init (klass);
1962
1963 methodt = &klass->image->tables [MONO_TABLE_METHOD];
1964 paramt = &klass->image->tables [MONO_TABLE_PARAM];
1965 idx = mono_method_get_index (method);
1966 if (idx > 0) {
1967 guint32 cols [MONO_PARAM_SIZE];
1968 guint param_index = mono_metadata_decode_row_col (methodt, idx - 1, MONO_METHOD_PARAMLIST);
1969
1970 if (idx + 1 < methodt->rows)
1971 lastp = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1972 else
1973 lastp = paramt->rows + 1;
1974
1975 for (i = param_index; i < lastp; ++i) {
1976 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1977
1978 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL)
1979 return TRUE;
1980 }
1981 return FALSE;
1982 }
1983 return FALSE;
1984 }
1985
1986 gpointer
1987 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
1988 {
1989 void **data;
1990 g_assert (method != NULL);
1991 g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
1992
1993 if (method->is_inflated)
1994 method = ((MonoMethodInflated *) method)->declaring;
1995 data = ((MonoMethodWrapper *)method)->method_data;
1996 g_assert (data != NULL);
1997 g_assert (id <= GPOINTER_TO_UINT (*data));
1998 return data [id];
1999 }
2000
2001 static void
2002 default_stack_walk (MonoStackWalk func, gboolean do_il_offset, gpointer user_data) {
2003 g_error ("stack walk not installed");
2004 }
2005
2006 static MonoStackWalkImpl stack_walk = default_stack_walk;
2007
2008 void
2009 mono_stack_walk (MonoStackWalk func, gpointer user_data)
2010 {
2011 stack_walk (func, TRUE, user_data);
2012 }
2013
2014 void
2015 mono_stack_walk_no_il (MonoStackWalk func, gpointer user_data)
2016 {
2017 stack_walk (func, FALSE, user_data);
2018 }
2019
2020 void
2021 mono_install_stack_walk (MonoStackWalkImpl func)
2022 {
2023 stack_walk = func;
2024 }
2025
2026 static gboolean
2027 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2028 {
2029 MonoMethod **dest = data;
2030 *dest = m;
2031 /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
2032
2033 return managed;
2034 }
2035
2036 MonoMethod*
2037 mono_method_get_last_managed (void)
2038 {
2039 MonoMethod *m = NULL;
2040 stack_walk (last_managed, FALSE, &m);
2041 return m;
2042 }
2043
2044 static gboolean loader_lock_track_ownership = FALSE;
2045
2046 /**
2047 * mono_loader_lock:
2048 *
2049 * See docs/thread-safety.txt for the locking strategy.
2050 */
2051 void
2052 mono_loader_lock (void)
2053 {
2054 mono_locks_acquire (&loader_mutex, LoaderLock);
2055 if (G_UNLIKELY (loader_lock_track_ownership)) {
2056 TlsSetValue (loader_lock_nest_id, GUINT_TO_POINTER (GPOINTER_TO_UINT (TlsGetValue (loader_lock_nest_id)) + 1));
2057 }
2058 }
2059
2060 void
2061 mono_loader_unlock (void)
2062 {
2063 mono_locks_release (&loader_mutex, LoaderLock);
2064 if (G_UNLIKELY (loader_lock_track_ownership)) {
2065 TlsSetValue (loader_lock_nest_id, GUINT_TO_POINTER (GPOINTER_TO_UINT (TlsGetValue (loader_lock_nest_id)) - 1));
2066 }
2067 }
2068
2069 /*
2070 * mono_loader_lock_track_ownership:
2071 *
2072 * Set whenever the runtime should track ownership of the loader lock. If set to TRUE,
2073 * the mono_loader_lock_is_owned_by_self () can be called to query whenever the current
2074 * thread owns the loader lock.
2075 */
2076 void
2077 mono_loader_lock_track_ownership (gboolean track)
2078 {
2079 loader_lock_track_ownership = track;
2080 }
2081
2082 /*
2083 * mono_loader_lock_is_owned_by_self:
2084 *
2085 * Return whenever the current thread owns the loader lock.
2086 * This is useful to avoid blocking operations while holding the loader lock.
2087 */
2088 gboolean
2089 mono_loader_lock_is_owned_by_self (void)
2090 {
2091 g_assert (loader_lock_track_ownership);
2092
2093 return GPOINTER_TO_UINT (TlsGetValue (loader_lock_nest_id)) > 0;
2094 }
2095
2096 /**
2097 * mono_method_signature:
2098 *
2099 * Return the signature of the method M. On failure, returns NULL, and ERR is set.
2100 */
2101 MonoMethodSignature*
2102 mono_method_signature_checked (MonoMethod *m, MonoError *error)
2103 {
2104 int idx;
2105 int size;
2106 MonoImage* img;
2107 const char *sig;
2108 gboolean can_cache_signature;
2109 MonoGenericContainer *container;
2110 MonoMethodSignature *signature = NULL;
2111 guint32 sig_offset;
2112
2113 /* We need memory barriers below because of the double-checked locking pattern */
2114
2115 mono_error_init (error);
2116
2117 if (m->signature)
2118 return m->signature;
2119
2120 mono_loader_lock ();
2121
2122 if (m->signature) {
2123 mono_loader_unlock ();
2124 return m->signature;
2125 }
2126
2127 if (m->is_inflated) {
2128 MonoMethodInflated *imethod = (MonoMethodInflated *) m;
2129 /* the lock is recursive */
2130 signature = mono_method_signature (imethod->declaring);
2131 signature = inflate_generic_signature (imethod->declaring->klass->image, signature, mono_method_get_context (m));
2132
2133 inflated_signatures_size += mono_metadata_signature_size (signature);
2134
2135 mono_memory_barrier ();
2136 m->signature = signature;
2137 mono_loader_unlock ();
2138 return m->signature;
2139 }
2140
2141 g_assert (mono_metadata_token_table (m->token) == MONO_TABLE_METHOD);
2142 idx = mono_metadata_token_index (m->token);
2143 img = m->klass->image;
2144
2145 sig = mono_metadata_blob_heap (img, sig_offset = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_SIGNATURE));
2146
2147 g_assert (!m->klass->generic_class);
2148 container = mono_method_get_generic_container (m);
2149 if (!container)
2150 container = m->klass->generic_container;
2151
2152 /* Generic signatures depend on the container so they cannot be cached */
2153 /* icall/pinvoke signatures cannot be cached cause we modify them below */
2154 can_cache_signature = !(m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) && !(m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) && !container;
2155
2156 /* If the method has parameter attributes, that can modify the signature */
2157 if (mono_metadata_method_has_param_attrs (img, idx))
2158 can_cache_signature = FALSE;
2159
2160 if (can_cache_signature)
2161 signature = g_hash_table_lookup (img->method_signatures, sig);
2162
2163 if (!signature) {
2164 const char *sig_body;
2165 /*TODO we should cache the failure result somewhere*/
2166 if (!mono_verifier_verify_method_signature (img, sig_offset, NULL)) {
2167 mono_loader_unlock ();
2168 mono_error_set_method_load (error, m->klass, m->name, "");
2169 return NULL;
2170 }
2171
2172 size = mono_metadata_decode_blob_size (sig, &sig_body);
2173
2174 signature = mono_metadata_parse_method_signature_full (img, container, idx, sig_body, NULL);
2175 if (!signature) {
2176 mono_loader_unlock ();
2177 mono_error_set_method_load (error, m->klass, m->name, "");
2178 return NULL;
2179 }
2180
2181 if (can_cache_signature)
2182 g_hash_table_insert (img->method_signatures, (gpointer)sig, signature);
2183 }
2184
2185 /* Verify metadata consistency */
2186 if (signature->generic_param_count) {
2187 if (!container || !container->is_method) {
2188 mono_loader_unlock ();
2189 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);
2190 return NULL;
2191 }
2192 if (container->type_argc != signature->generic_param_count) {
2193 mono_loader_unlock ();
2194 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);
2195 return NULL;
2196 }
2197 } else if (container && container->is_method && container->type_argc) {
2198 mono_loader_unlock ();
2199 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);
2200 return NULL;
2201 }
2202 if (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)
2203 signature->pinvoke = 1;
2204 else if (m->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
2205 MonoCallConvention conv = 0;
2206 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)m;
2207 signature->pinvoke = 1;
2208
2209 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CALL_CONV_MASK) {
2210 case 0: /* no call conv, so using default */
2211 case PINVOKE_ATTRIBUTE_CALL_CONV_WINAPI:
2212 conv = MONO_CALL_DEFAULT;
2213 break;
2214 case PINVOKE_ATTRIBUTE_CALL_CONV_CDECL:
2215 conv = MONO_CALL_C;
2216 break;
2217 case PINVOKE_ATTRIBUTE_CALL_CONV_STDCALL:
2218 conv = MONO_CALL_STDCALL;
2219 break;
2220 case PINVOKE_ATTRIBUTE_CALL_CONV_THISCALL:
2221 conv = MONO_CALL_THISCALL;
2222 break;
2223 case PINVOKE_ATTRIBUTE_CALL_CONV_FASTCALL:
2224 conv = MONO_CALL_FASTCALL;
2225 break;
2226 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERIC:
2227 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERICINST:
2228 default:
2229 mono_loader_unlock ();
2230 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);
2231 return NULL;
2232 }
2233 signature->call_convention = conv;
2234 }
2235
2236 mono_memory_barrier ();
2237 m->signature = signature;
2238
2239 mono_loader_unlock ();
2240 return m->signature;
2241 }
2242
2243 /**
2244 * mono_method_signature:
2245 *
2246 * Return the signature of the method M. On failure, returns NULL.
2247 */
2248 MonoMethodSignature*
2249 mono_method_signature (MonoMethod *m)
2250 {
2251 MonoError error;
2252 MonoMethodSignature *sig;
2253
2254 sig = mono_method_signature_checked (m, &error);
2255 if (!sig) {
2256 g_warning ("Could not load signature due to: %s", mono_error_get_message (&error));
2257 mono_error_cleanup (&error);
2258 }
2259
2260 return sig;
2261 }
2262
2263 const char*
2264 mono_method_get_name (MonoMethod *method)
2265 {
2266 return method->name;
2267 }
2268
2269 MonoClass*
2270 mono_method_get_class (MonoMethod *method)
2271 {
2272 return method->klass;
2273 }
2274
2275 guint32
2276 mono_method_get_token (MonoMethod *method)
2277 {
2278 return method->token;
2279 }
2280
2281 MonoMethodHeader*
2282 mono_method_get_header (MonoMethod *method)
2283 {
2284 int idx;
2285 guint32 rva;
2286 MonoImage* img;
2287 gpointer loc;
2288 MonoMethodHeader *header;
2289
2290 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))
2291 return NULL;
2292
2293 if (method->wrapper_type != MONO_WRAPPER_NONE || method->sre_method) {
2294 MonoMethodWrapper *mw = (MonoMethodWrapper *)method;
2295 g_assert (mw->header);
2296 return mw->header;
2297 }
2298
2299 if (method->is_inflated) {
2300 MonoMethodInflated *imethod = (MonoMethodInflated *) method;
2301 MonoMethodHeader *header;
2302
2303 mono_loader_lock ();
2304
2305 if (imethod->header) {
2306 mono_loader_unlock ();
2307 return imethod->header;
2308 }
2309
2310 header = mono_method_get_header (imethod->declaring);
2311
2312 imethod->header = inflate_generic_header (header, mono_method_get_context (method));
2313 mono_loader_unlock ();
2314 mono_metadata_free_mh (header);
2315 return imethod->header;
2316 }
2317
2318 /*
2319 * We don't need locks here: the new header is allocated from malloc memory
2320 * and is not stored anywhere in the runtime, the user needs to free it.
2321 */
2322 g_assert (mono_metadata_token_table (method->token) == MONO_TABLE_METHOD);
2323 idx = mono_metadata_token_index (method->token);
2324 img = method->klass->image;
2325 rva = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_RVA);
2326
2327 if (!mono_verifier_verify_method_header (img, rva, NULL))
2328 return NULL;
2329
2330 loc = mono_image_rva_map (img, rva);
2331 if (!loc)
2332 return NULL;
2333
2334 header = mono_metadata_parse_mh_full (img, mono_method_get_generic_container (method), loc);
2335
2336 return header;
2337 }
2338
2339 guint32
2340 mono_method_get_flags (MonoMethod *method, guint32 *iflags)
2341 {
2342 if (iflags)
2343 *iflags = method->iflags;
2344 return method->flags;
2345 }
2346
2347 /*
2348 * Find the method index in the metadata methodDef table.
2349 */
2350 guint32
2351 mono_method_get_index (MonoMethod *method) {
2352 MonoClass *klass = method->klass;
2353 int i;
2354
2355 if (method->token)
2356 return mono_metadata_token_index (method->token);
2357
2358 mono_class_setup_methods (klass);
2359 if (klass->exception_type)
2360 return 0;
2361 for (i = 0; i < klass->method.count; ++i) {
2362 if (method == klass->methods [i]) {
2363 if (klass->image->uncompressed_metadata)
2364 return mono_metadata_translate_token_index (klass->image, MONO_TABLE_METHOD, klass->method.first + i + 1);
2365 else
2366 return klass->method.first + i + 1;
2367 }
2368 }
2369 return 0;
2370 }
2371
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