2 * loader.c: Image Loader
5 * Paolo Molaro (lupus@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * (C) 2001 Ximian, Inc.
11 * This file is used by the interpreter and the JIT engine to locate
12 * assemblies. Used to load AssemblyRef and later to resolve various
16 * This should keep track of the assembly versions that we are loading.
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/cil-coff.h>
30 #include <mono/metadata/tabledefs.h>
31 #include <mono/metadata/loader.h>
32 #include <mono/metadata/class.h>
33 #include <mono/metadata/debug-helpers.h>
34 #include <mono/metadata/reflection.h>
36 static gboolean dummy_icall = TRUE;
38 MonoDefaults mono_defaults;
40 static GHashTable *icall_hash = NULL;
43 mono_add_internal_call (const char *name, gconstpointer method)
47 icall_hash = g_hash_table_new (g_str_hash , g_str_equal);
50 g_hash_table_insert (icall_hash, g_strdup (name), (gpointer) method);
54 ves_icall_dummy (void)
56 g_warning ("the mono runtime is not initialized");
57 g_assert_not_reached ();
61 mono_lookup_internal_call (MonoMethod *method)
68 return ves_icall_dummy;
71 g_warning ("can't resolve internal call, method is null");
75 g_warning ("icall_hash not initialized");
76 g_assert_not_reached ();
79 if (*method->klass->name_space)
80 name = g_strconcat (method->klass->name_space, ".", method->klass->name, "::", method->name, NULL);
82 name = g_strconcat (method->klass->name, "::", method->name, NULL);
83 if (!(res = g_hash_table_lookup (icall_hash, name))) {
84 /* trying to resolve with full signature */
87 tmpsig = mono_signature_get_desc(method->signature, TRUE);
88 if (*method->klass->name_space)
89 name = g_strconcat (method->klass->name_space, ".", method->klass->name, "::", method->name, "(", tmpsig, ")", NULL);
91 name = g_strconcat (method->klass->name, "::", method->name, "(", tmpsig, ")", NULL);
92 if (!(res = g_hash_table_lookup (icall_hash, name))) {
93 g_warning ("cant resolve internal call to \"%s\" (tested without signature also)", name);
94 g_print ("\nYour mono runtime and corlib are out of sync.\n");
95 g_print ("Corlib is: %s", method->klass->image->name);
96 g_print ("When you update one from cvs you need to update, compile and install\nthe other too.\n");
97 g_print ("Do not report this as a bug unless you're sure you have updated correctly:\nyou probably have a broken mono install.\n");
98 g_print ("If you see other errors or faults after this message they are probably related\n");
99 g_print ("and you need to fix your mono install first.\n");
116 mono_field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass)
119 MonoTableInfo *tables = image->tables;
121 guint32 nindex, class;
124 guint32 idx = mono_metadata_token_index (token);
126 if (image->assembly->dynamic) {
127 MonoClassField *result = mono_lookup_dynamic_token (image, token);
128 *retklass = result->parent;
132 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
133 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
134 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
136 fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
138 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
139 mono_metadata_decode_blob_size (ptr, &ptr);
140 /* we may want to check the signature here... */
143 case MEMBERREF_PARENT_TYPEREF:
144 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
146 g_warning ("Missing field %s in typeref index %d", fname, nindex);
149 mono_class_init (klass);
152 return mono_class_get_field_from_name (klass, fname);
159 mono_field_from_token (MonoImage *image, guint32 token, MonoClass **retklass)
164 if (image->assembly->dynamic) {
165 MonoClassField *result = mono_lookup_dynamic_token (image, token);
166 *retklass = result->parent;
170 if (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
171 return mono_field_from_memberref (image, token, retklass);
173 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
176 k = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
182 return mono_class_get_field (k, token);
186 find_method (MonoClass *klass, const char* name, MonoMethodSignature *sig)
190 /* mostly dumb search for now */
191 for (i = 0; i < klass->method.count; ++i) {
192 MonoMethod *m = klass->methods [i];
193 if (!strcmp (name, m->name)) {
194 if (mono_metadata_signature_equal (sig, m->signature))
198 klass = klass->parent;
205 method_from_memberref (MonoImage *image, guint32 idx)
209 MonoTableInfo *tables = image->tables;
211 guint32 nindex, class;
213 MonoMethodSignature *sig;
216 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
217 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
218 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
219 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
220 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
222 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
224 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
225 mono_metadata_decode_blob_size (ptr, &ptr);
226 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
229 case MEMBERREF_PARENT_TYPEREF:
230 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
232 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
233 mono_metadata_free_method_signature (sig);
236 mono_class_init (klass);
237 method = find_method (klass, mname, sig);
239 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
240 mono_metadata_free_method_signature (sig);
242 case MEMBERREF_PARENT_TYPESPEC: {
243 guint32 bcols [MONO_TYPESPEC_SIZE];
248 mono_metadata_decode_row (&tables [MONO_TABLE_TYPESPEC], nindex - 1,
249 bcols, MONO_TYPESPEC_SIZE);
250 ptr = mono_metadata_blob_heap (image, bcols [MONO_TYPESPEC_SIGNATURE]);
251 len = mono_metadata_decode_value (ptr, &ptr);
252 type = mono_metadata_parse_type (image, MONO_PARSE_TYPE, 0, ptr, &ptr);
254 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
255 klass = mono_class_from_mono_type (type);
256 mono_class_init (klass);
257 method = find_method (klass, mname, sig);
259 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
260 mono_metadata_free_method_signature (sig);
264 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
265 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_SPEC | nindex);
266 result->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
267 result->signature = sig;
268 result->name = mname;
270 if (!strcmp (mname, ".ctor")) {
271 /* we special-case this in the runtime. */
276 if (!strcmp (mname, "Set")) {
277 g_assert (sig->hasthis);
278 g_assert (type->data.array->rank + 1 == sig->param_count);
279 result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
284 if (!strcmp (mname, "Get")) {
285 g_assert (sig->hasthis);
286 g_assert (type->data.array->rank == sig->param_count);
287 result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
292 if (!strcmp (mname, "Address")) {
293 g_assert (sig->hasthis);
294 g_assert (type->data.array->rank == sig->param_count);
295 result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
300 g_assert_not_reached ();
303 case MEMBERREF_PARENT_TYPEDEF:
304 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | nindex);
306 g_warning ("Missing method %s in assembly %s typedef index %d", mname, image->name, nindex);
307 mono_metadata_free_method_signature (sig);
310 mono_class_init (klass);
311 method = find_method (klass, mname, sig);
313 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
314 mono_metadata_free_method_signature (sig);
317 g_error ("Memberref parent unknown: class: %d, index %d", class, nindex);
318 g_assert_not_reached ();
324 typedef struct MonoDllMap MonoDllMap;
333 static GHashTable *dll_map;
336 mono_dllmap_lookup (const char *dll, const char* func, const char **rdll, const char **rfunc) {
337 MonoDllMap *map, *tmp;
341 map = g_hash_table_lookup (dll_map, dll);
344 *rdll = map->target? map->target: dll;
346 for (tmp = map->next; tmp; tmp = tmp->next) {
347 if (strcmp (func, tmp->name) == 0) {
359 mono_dllmap_insert (const char *dll, const char *func, const char *tdll, const char *tfunc) {
360 MonoDllMap *map, *entry;
363 dll_map = g_hash_table_new (g_str_hash, g_str_equal);
365 map = g_hash_table_lookup (dll_map, dll);
367 map = g_new0 (MonoDllMap, 1);
368 map->dll = g_strdup (dll);
370 map->target = g_strdup (tdll);
371 g_hash_table_insert (dll_map, map->dll, map);
374 entry = g_new0 (MonoDllMap, 1);
375 entry->name = g_strdup (func);
377 entry->target = g_strdup (tfunc);
378 if (tdll && map->target && strcmp (map->target, tdll))
379 entry->dll = g_strdup (tdll);
380 entry->next = map->next;
386 mono_lookup_pinvoke_call (MonoMethod *method)
388 MonoImage *image = method->klass->image;
389 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
390 MonoTableInfo *tables = image->tables;
391 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
392 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
393 guint32 im_cols [MONO_IMPLMAP_SIZE];
395 const char *import = NULL;
396 const char *scope = NULL;
400 g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
404 if (!piinfo->implmap_idx)
407 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
409 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
410 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
411 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
412 scope = mono_metadata_string_heap (image, scope_token);
414 mono_dllmap_lookup (scope, import, &scope, &import);
416 full_name = g_module_build_path (NULL, scope);
417 gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
420 gchar *error = g_strdup (g_module_error ());
421 if (!(gmodule=g_module_open (scope, G_MODULE_BIND_LAZY))) {
422 g_warning ("Failed to load library %s (%s): %s", full_name, scope, error);
431 g_module_symbol (gmodule, import, &method->addr);
434 g_warning ("Failed to load function %s from %s", import, scope);
441 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
444 int table = mono_metadata_token_table (token);
445 int idx = mono_metadata_token_index (token);
446 MonoTableInfo *tables = image->tables;
447 const char *loc, *sig = NULL;
449 guint32 cols [MONO_TYPEDEF_SIZE];
451 if ((result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (token))))
454 if (image->assembly->dynamic)
455 return mono_lookup_dynamic_token (image, token);
457 if (table != MONO_TABLE_METHOD) {
458 if (table != MONO_TABLE_MEMBERREF)
459 g_print("got wrong token: 0x%08x\n", token);
460 g_assert (table == MONO_TABLE_MEMBERREF);
461 result = method_from_memberref (image, idx);
462 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
466 mono_metadata_decode_row (&tables [table], idx - 1, cols, 6);
468 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
469 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
470 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
472 result = (MonoMethod *)g_new0 (MonoMethodNormal, 1);
475 result->klass = klass;
476 result->flags = cols [2];
477 result->iflags = cols [1];
478 result->token = token;
479 result->name = mono_metadata_string_heap (image, cols [3]);
481 if (!sig) /* already taken from the methodref */
482 sig = mono_metadata_blob_heap (image, cols [4]);
483 size = mono_metadata_decode_blob_size (sig, &sig);
484 result->signature = mono_metadata_parse_method_signature (image, idx, sig, NULL);
486 if (!result->klass) {
487 guint32 type = mono_metadata_typedef_from_method (image, token);
488 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
491 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
492 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
493 result->string_ctor = 1;
495 result->addr = mono_lookup_internal_call (result);
496 result->signature->pinvoke = 1;
497 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
498 result->signature->pinvoke = 1;
499 ((MonoMethodPInvoke *)result)->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
501 /* if this is a methodref from another module/assembly, this fails */
502 loc = mono_cli_rva_map ((MonoCLIImageInfo *)image->image_info, cols [0]);
504 if (!result->klass->dummy && !(result->flags & METHOD_ATTRIBUTE_ABSTRACT) &&
505 !(result->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME)) {
507 ((MonoMethodNormal *)result)->header = mono_metadata_parse_mh (image, loc);
511 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
517 mono_free_method (MonoMethod *method)
519 mono_metadata_free_method_signature (method->signature);
520 if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
521 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
522 g_free (piinfo->code);
523 } else if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
524 mono_metadata_free_mh (((MonoMethodNormal *)method)->header);
531 mono_method_get_param_names (MonoMethod *method, const char **names)
534 MonoClass *klass = method->klass;
535 MonoTableInfo *methodt;
536 MonoTableInfo *paramt;
538 if (!method->signature->param_count)
540 for (i = 0; i < method->signature->param_count; ++i)
543 mono_class_init (klass);
545 if (klass->wastypebuilder) /* copy the names later */
548 methodt = &klass->image->tables [MONO_TABLE_METHOD];
549 paramt = &klass->image->tables [MONO_TABLE_PARAM];
550 for (i = 0; i < klass->method.count; ++i) {
551 if (method == klass->methods [i]) {
552 guint32 idx = klass->method.first + i;
553 guint32 cols [MONO_PARAM_SIZE];
554 guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
556 if (idx + 1 < methodt->rows)
557 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
559 lastp = paramt->rows + 1;
560 for (i = param_index; i < lastp; ++i) {
561 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
562 if (cols [MONO_PARAM_SEQUENCE]) /* skip return param spec */
563 names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass->image, cols [MONO_PARAM_NAME]);
571 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
574 MonoClass *klass = method->klass;
575 MonoTableInfo *methodt;
576 MonoTableInfo *paramt;
578 for (i = 0; i < method->signature->param_count + 1; ++i)
581 mono_class_init (klass);
583 methodt = &klass->image->tables [MONO_TABLE_METHOD];
584 paramt = &klass->image->tables [MONO_TABLE_PARAM];
586 for (i = 0; i < klass->method.count; ++i) {
587 if (method == klass->methods [i]) {
588 guint32 idx = klass->method.first + i;
589 guint32 cols [MONO_PARAM_SIZE];
590 guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
592 if (idx + 1 < methodt->rows)
593 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
595 lastp = paramt->rows + 1;
597 for (i = param_index; i < lastp; ++i) {
598 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
600 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL) {
602 tp = mono_metadata_get_marshal_info (klass->image, i - 1, FALSE);
604 mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass->image, tp);
613 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
616 g_assert (method != NULL);
617 g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
619 if (!(l = g_list_nth (((MonoMethodWrapper *)method)->data, id - 1)))
620 g_assert_not_reached ();
626 default_stack_walk (MonoStackWalk func, gpointer user_data) {
627 g_error ("stack walk not installed");
630 static MonoStackWalkImpl stack_walk = default_stack_walk;
633 mono_stack_walk (MonoStackWalk func, gpointer user_data)
635 stack_walk (func, user_data);
639 mono_install_stack_walk (MonoStackWalkImpl func)
645 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
647 MonoMethod **dest = data;
649 /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
655 mono_method_get_last_managed (void)
657 MonoMethod *m = NULL;
658 stack_walk (last_managed, &m);