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 ("When you update one from cvs you need to update, compile and install\nthe other too.\n");
96 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");
97 g_print ("If you see other errors or faults after this message they are probably related\n");
98 g_print ("and you need to fix your mono install first.\n");
115 mono_field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass)
118 MonoTableInfo *tables = image->tables;
120 guint32 nindex, class;
123 guint32 idx = mono_metadata_token_index (token);
125 if (image->assembly->dynamic) {
126 MonoClassField *result = mono_lookup_dynamic_token (image, token);
127 *retklass = result->parent;
131 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
132 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
133 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
135 fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
137 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
138 mono_metadata_decode_blob_size (ptr, &ptr);
139 /* we may want to check the signature here... */
142 case MEMBERREF_PARENT_TYPEREF:
143 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
145 g_warning ("Missing field %s in typeref index %d", fname, nindex);
148 mono_class_init (klass);
151 return mono_class_get_field_from_name (klass, fname);
158 mono_field_from_token (MonoImage *image, guint32 token, MonoClass **retklass)
163 if (image->assembly->dynamic) {
164 MonoClassField *result = mono_lookup_dynamic_token (image, token);
165 *retklass = result->parent;
169 if (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
170 return mono_field_from_memberref (image, token, retklass);
172 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
175 k = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
181 return mono_class_get_field (k, token);
185 find_method (MonoClass *klass, const char* name, MonoMethodSignature *sig)
189 /* mostly dumb search for now */
190 for (i = 0; i < klass->method.count; ++i) {
191 MonoMethod *m = klass->methods [i];
192 if (!strcmp (name, m->name)) {
193 if (mono_metadata_signature_equal (sig, m->signature))
197 klass = klass->parent;
204 method_from_memberref (MonoImage *image, guint32 idx)
208 MonoTableInfo *tables = image->tables;
210 guint32 nindex, class;
212 MonoMethodSignature *sig;
215 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
216 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
217 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
218 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
219 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
221 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
223 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
224 mono_metadata_decode_blob_size (ptr, &ptr);
225 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
228 case MEMBERREF_PARENT_TYPEREF:
229 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
231 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
232 mono_metadata_free_method_signature (sig);
235 mono_class_init (klass);
236 method = find_method (klass, mname, sig);
238 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
239 mono_metadata_free_method_signature (sig);
241 case MEMBERREF_PARENT_TYPESPEC: {
242 guint32 bcols [MONO_TYPESPEC_SIZE];
247 mono_metadata_decode_row (&tables [MONO_TABLE_TYPESPEC], nindex - 1,
248 bcols, MONO_TYPESPEC_SIZE);
249 ptr = mono_metadata_blob_heap (image, bcols [MONO_TYPESPEC_SIGNATURE]);
250 len = mono_metadata_decode_value (ptr, &ptr);
251 type = mono_metadata_parse_type (image, MONO_PARSE_TYPE, 0, ptr, &ptr);
253 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
254 klass = mono_class_from_mono_type (type);
255 mono_class_init (klass);
256 method = find_method (klass, mname, sig);
258 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
259 mono_metadata_free_method_signature (sig);
263 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
264 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_SPEC | nindex);
265 result->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
266 result->signature = sig;
267 result->name = mname;
269 if (!strcmp (mname, ".ctor")) {
270 /* we special-case this in the runtime. */
275 if (!strcmp (mname, "Set")) {
276 g_assert (sig->hasthis);
277 g_assert (type->data.array->rank + 1 == sig->param_count);
278 result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
283 if (!strcmp (mname, "Get")) {
284 g_assert (sig->hasthis);
285 g_assert (type->data.array->rank == sig->param_count);
286 result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
291 if (!strcmp (mname, "Address")) {
292 g_assert (sig->hasthis);
293 g_assert (type->data.array->rank == sig->param_count);
294 result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
299 g_assert_not_reached ();
302 case MEMBERREF_PARENT_TYPEDEF:
303 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | nindex);
305 g_warning ("Missing method %s in assembly %s typedef index %d", mname, image->name, nindex);
306 mono_metadata_free_method_signature (sig);
309 mono_class_init (klass);
310 method = find_method (klass, mname, sig);
312 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
313 mono_metadata_free_method_signature (sig);
316 g_error ("Memberref parent unknown: class: %d, index %d", class, nindex);
317 g_assert_not_reached ();
323 typedef struct MonoDllMap MonoDllMap;
332 static GHashTable *dll_map;
335 mono_dllmap_lookup (const char *dll, const char* func, const char **rdll, const char **rfunc) {
336 MonoDllMap *map, *tmp;
340 map = g_hash_table_lookup (dll_map, dll);
343 *rdll = map->target? map->target: dll;
345 for (tmp = map->next; tmp; tmp = tmp->next) {
346 if (strcmp (func, tmp->name) == 0) {
358 mono_dllmap_insert (const char *dll, const char *func, const char *tdll, const char *tfunc) {
359 MonoDllMap *map, *entry;
362 dll_map = g_hash_table_new (g_str_hash, g_str_equal);
364 map = g_hash_table_lookup (dll_map, dll);
366 map = g_new0 (MonoDllMap, 1);
367 map->dll = g_strdup (dll);
369 map->target = g_strdup (tdll);
370 g_hash_table_insert (dll_map, map->dll, map);
373 entry = g_new0 (MonoDllMap, 1);
374 entry->name = g_strdup (func);
376 entry->target = g_strdup (tfunc);
377 if (tdll && map->target && strcmp (map->target, tdll))
378 entry->dll = g_strdup (tdll);
379 entry->next = map->next;
385 mono_lookup_pinvoke_call (MonoMethod *method)
387 MonoImage *image = method->klass->image;
388 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
389 MonoTableInfo *tables = image->tables;
390 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
391 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
392 guint32 im_cols [MONO_IMPLMAP_SIZE];
394 const char *import = NULL;
395 const char *scope = NULL;
399 g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
403 if (!piinfo->implmap_idx)
406 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
408 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
409 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
410 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
411 scope = mono_metadata_string_heap (image, scope_token);
413 mono_dllmap_lookup (scope, import, &scope, &import);
415 full_name = g_module_build_path (NULL, scope);
416 gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
419 gchar *error = g_strdup (g_module_error ());
420 if (!(gmodule=g_module_open (scope, G_MODULE_BIND_LAZY))) {
421 g_warning ("Failed to load library %s (%s): %s", full_name, scope, error);
430 g_module_symbol (gmodule, import, &method->addr);
433 g_warning ("Failed to load function %s from %s", import, scope);
440 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
443 int table = mono_metadata_token_table (token);
444 int idx = mono_metadata_token_index (token);
445 MonoTableInfo *tables = image->tables;
446 const char *loc, *sig = NULL;
448 guint32 cols [MONO_TYPEDEF_SIZE];
450 if ((result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (token))))
453 if (image->assembly->dynamic)
454 return mono_lookup_dynamic_token (image, token);
456 if (table != MONO_TABLE_METHOD) {
457 if (table != MONO_TABLE_MEMBERREF)
458 g_print("got wrong token: 0x%08x\n", token);
459 g_assert (table == MONO_TABLE_MEMBERREF);
460 result = method_from_memberref (image, idx);
461 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
465 mono_metadata_decode_row (&tables [table], idx - 1, cols, 6);
467 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
468 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
469 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
471 result = (MonoMethod *)g_new0 (MonoMethodNormal, 1);
474 result->klass = klass;
475 result->flags = cols [2];
476 result->iflags = cols [1];
477 result->token = token;
478 result->name = mono_metadata_string_heap (image, cols [3]);
480 if (!sig) /* already taken from the methodref */
481 sig = mono_metadata_blob_heap (image, cols [4]);
482 size = mono_metadata_decode_blob_size (sig, &sig);
483 result->signature = mono_metadata_parse_method_signature (image, idx, sig, NULL);
485 if (!result->klass) {
486 guint32 type = mono_metadata_typedef_from_method (image, token);
487 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
490 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
491 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
492 result->string_ctor = 1;
494 result->addr = mono_lookup_internal_call (result);
495 result->signature->pinvoke = 1;
496 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
497 result->signature->pinvoke = 1;
498 ((MonoMethodPInvoke *)result)->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
500 /* if this is a methodref from another module/assembly, this fails */
501 loc = mono_cli_rva_map ((MonoCLIImageInfo *)image->image_info, cols [0]);
503 if (!result->klass->dummy && !(result->flags & METHOD_ATTRIBUTE_ABSTRACT) &&
504 !(result->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME)) {
506 ((MonoMethodNormal *)result)->header = mono_metadata_parse_mh (image, loc);
510 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
516 mono_free_method (MonoMethod *method)
518 mono_metadata_free_method_signature (method->signature);
519 if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
520 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
521 g_free (piinfo->code);
522 } else if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
523 mono_metadata_free_mh (((MonoMethodNormal *)method)->header);
530 mono_method_get_param_names (MonoMethod *method, const char **names)
533 MonoClass *klass = method->klass;
534 MonoTableInfo *methodt;
535 MonoTableInfo *paramt;
537 if (!method->signature->param_count)
539 for (i = 0; i < method->signature->param_count; ++i)
542 mono_class_init (klass);
544 if (klass->wastypebuilder) /* copy the names later */
547 methodt = &klass->image->tables [MONO_TABLE_METHOD];
548 paramt = &klass->image->tables [MONO_TABLE_PARAM];
549 for (i = 0; i < klass->method.count; ++i) {
550 if (method == klass->methods [i]) {
551 guint32 idx = klass->method.first + i;
552 guint32 cols [MONO_PARAM_SIZE];
553 guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
555 if (idx + 1 < methodt->rows)
556 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
558 lastp = paramt->rows + 1;
559 for (i = param_index; i < lastp; ++i) {
560 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
561 if (cols [MONO_PARAM_SEQUENCE]) /* skip return param spec */
562 names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass->image, cols [MONO_PARAM_NAME]);
570 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
573 MonoClass *klass = method->klass;
574 MonoTableInfo *methodt;
575 MonoTableInfo *paramt;
577 for (i = 0; i < method->signature->param_count + 1; ++i)
580 mono_class_init (klass);
582 methodt = &klass->image->tables [MONO_TABLE_METHOD];
583 paramt = &klass->image->tables [MONO_TABLE_PARAM];
585 for (i = 0; i < klass->method.count; ++i) {
586 if (method == klass->methods [i]) {
587 guint32 idx = klass->method.first + i;
588 guint32 cols [MONO_PARAM_SIZE];
589 guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
591 if (idx + 1 < methodt->rows)
592 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
594 lastp = paramt->rows + 1;
596 for (i = param_index; i < lastp; ++i) {
597 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
599 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL) {
601 tp = mono_metadata_get_marshal_info (klass->image, i - 1, FALSE);
603 mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass->image, tp);
612 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
615 g_assert (method != NULL);
616 g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
618 if (!(l = g_list_nth (((MonoMethodWrapper *)method)->data, id - 1)))
619 g_assert_not_reached ();
625 default_stack_walk (MonoStackWalk func, gpointer user_data) {
626 g_error ("stack walk not installed");
629 static MonoStackWalkImpl stack_walk = default_stack_walk;
632 mono_stack_walk (MonoStackWalk func, gpointer user_data)
634 stack_walk (func, user_data);
638 mono_install_stack_walk (MonoStackWalkImpl func)
644 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
646 MonoMethod **dest = data;
648 /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
654 mono_method_get_last_managed (void)
656 MonoMethod *m = NULL;
657 stack_walk (last_managed, &m);