2 * loader.c: Image Loader
5 * Paolo Molaro (lupus@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
8 * (C) 2001 Ximian, Inc.
10 * This file is used by the interpreter and the JIT engine to locate
11 * assemblies. Used to load AssemblyRef and later to resolve various
15 * This should keep track of the assembly versions that we are loading.
23 #include <mono/metadata/metadata.h>
24 #include <mono/metadata/image.h>
25 #include <mono/metadata/assembly.h>
26 #include <mono/metadata/tokentype.h>
27 #include <mono/metadata/cil-coff.h>
28 #include <mono/metadata/tabledefs.h>
29 #include <mono/metadata/loader.h>
30 #include <mono/metadata/class.h>
32 static gboolean dummy_icall = TRUE;
34 MonoDefaults mono_defaults;
37 #define mono_map_dll(name) (name)
39 static char *dll_map[] = {
42 "cygwin1.dll", "libc.so.6",
47 mono_map_dll (const char *name)
52 if (!strcmp (dll_map [i], name))
53 return dll_map [i + 1];
64 static gboolean initialized = FALSE;
66 enum MonoImageOpenStatus status = MONO_IMAGE_OK;
72 ass = mono_assembly_open (CORLIB_NAME, NULL, &status);
73 g_assert (status == MONO_IMAGE_OK);
74 g_assert (ass != NULL);
75 mono_defaults.corlib = ass->image;
77 mono_defaults.object_class = mono_class_from_name (
78 mono_defaults.corlib, "System", "Object");
79 g_assert (mono_defaults.object_class != 0);
81 mono_defaults.void_class = mono_class_from_name (
82 mono_defaults.corlib, "System", "Void");
83 g_assert (mono_defaults.void_class != 0);
85 mono_defaults.boolean_class = mono_class_from_name (
86 mono_defaults.corlib, "System", "Boolean");
87 g_assert (mono_defaults.boolean_class != 0);
89 mono_defaults.byte_class = mono_class_from_name (
90 mono_defaults.corlib, "System", "Byte");
91 g_assert (mono_defaults.byte_class != 0);
93 mono_defaults.sbyte_class = mono_class_from_name (
94 mono_defaults.corlib, "System", "SByte");
95 g_assert (mono_defaults.sbyte_class != 0);
97 mono_defaults.int16_class = mono_class_from_name (
98 mono_defaults.corlib, "System", "Int16");
99 g_assert (mono_defaults.int16_class != 0);
101 mono_defaults.uint16_class = mono_class_from_name (
102 mono_defaults.corlib, "System", "UInt16");
103 g_assert (mono_defaults.uint16_class != 0);
105 mono_defaults.int32_class = mono_class_from_name (
106 mono_defaults.corlib, "System", "Int32");
107 g_assert (mono_defaults.int32_class != 0);
109 mono_defaults.uint32_class = mono_class_from_name (
110 mono_defaults.corlib, "System", "UInt32");
111 g_assert (mono_defaults.uint32_class != 0);
113 mono_defaults.uint_class = mono_class_from_name (
114 mono_defaults.corlib, "System", "UIntPtr");
115 g_assert (mono_defaults.uint_class != 0);
117 mono_defaults.int_class = mono_class_from_name (
118 mono_defaults.corlib, "System", "IntPtr");
119 g_assert (mono_defaults.int_class != 0);
121 mono_defaults.int64_class = mono_class_from_name (
122 mono_defaults.corlib, "System", "Int64");
123 g_assert (mono_defaults.int64_class != 0);
125 mono_defaults.uint64_class = mono_class_from_name (
126 mono_defaults.corlib, "System", "UInt64");
127 g_assert (mono_defaults.uint64_class != 0);
129 mono_defaults.single_class = mono_class_from_name (
130 mono_defaults.corlib, "System", "Single");
131 g_assert (mono_defaults.single_class != 0);
133 mono_defaults.double_class = mono_class_from_name (
134 mono_defaults.corlib, "System", "Double");
135 g_assert (mono_defaults.double_class != 0);
137 mono_defaults.char_class = mono_class_from_name (
138 mono_defaults.corlib, "System", "Char");
139 g_assert (mono_defaults.char_class != 0);
141 mono_defaults.string_class = mono_class_from_name (
142 mono_defaults.corlib, "System", "String");
143 g_assert (mono_defaults.string_class != 0);
145 mono_defaults.enum_class = mono_class_from_name (
146 mono_defaults.corlib, "System", "Enum");
147 g_assert (mono_defaults.enum_class != 0);
149 mono_defaults.array_class = mono_class_from_name (
150 mono_defaults.corlib, "System", "Array");
151 g_assert (mono_defaults.array_class != 0);
153 mono_defaults.delegate_class = mono_class_from_name (
154 mono_defaults.corlib, "System", "Delegate");
155 g_assert (mono_defaults.delegate_class != 0);
157 mono_defaults.typehandle_class = mono_class_from_name (
158 mono_defaults.corlib, "System", "RuntimeTypeHandle");
159 g_assert (mono_defaults.typehandle_class != 0);
161 mono_defaults.methodhandle_class = mono_class_from_name (
162 mono_defaults.corlib, "System", "RuntimeMethodHandle");
163 g_assert (mono_defaults.methodhandle_class != 0);
165 mono_defaults.fieldhandle_class = mono_class_from_name (
166 mono_defaults.corlib, "System", "RuntimeFieldHandle");
167 g_assert (mono_defaults.fieldhandle_class != 0);
169 mono_defaults.monotype_class = mono_class_from_name (
170 mono_defaults.corlib, "System", "MonoType");
171 g_assert (mono_defaults.monotype_class != 0);
174 static GHashTable *icall_hash = NULL;
177 mono_add_internal_call (const char *name, gpointer method)
181 icall_hash = g_hash_table_new (g_str_hash , g_str_equal);
184 g_hash_table_insert (icall_hash, g_strdup (name), method);
190 g_warning ("the mono runtime is not initialized");
191 g_assert_not_reached ();
195 mono_lookup_internal_call (const char *name)
200 return ves_icall_dummy;
203 g_warning ("icall_hash not initialized");
204 g_assert_not_reached ();
207 if (!(res = g_hash_table_lookup (icall_hash, name))) {
208 g_warning ("cant resolve internal call to \"%s\"", name);
216 mono_field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass)
220 MonoTableInfo *tables = image->tables;
222 guint32 nindex, class, i;
223 const char *fname, *name, *nspace;
225 guint32 index = mono_metadata_token_index (token);
227 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], index-1, cols, MONO_MEMBERREF_SIZE);
228 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
229 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
231 fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
233 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
234 mono_metadata_decode_blob_size (ptr, &ptr);
235 /* we may want to check the signature here... */
238 case MEMBERREF_PARENT_TYPEREF: {
239 guint32 scopeindex, scopetable;
241 mono_metadata_decode_row (&tables [MONO_TABLE_TYPEREF], nindex-1, cols, MONO_TYPEREF_SIZE);
242 scopeindex = cols [MONO_TYPEREF_SCOPE] >> RESOLTION_SCOPE_BITS;
243 scopetable = cols [MONO_TYPEREF_SCOPE] & RESOLTION_SCOPE_MASK;
244 /*g_print ("typeref: 0x%x 0x%x %s.%s\n", scopetable, scopeindex,
245 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAMESPACE]),
246 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAME]));*/
247 switch (scopetable) {
248 case RESOLTION_SCOPE_ASSEMBLYREF:
250 * To find the field we have the following info:
251 * *) name and namespace of the class from the TYPEREF table
252 * *) name and signature of the field from the MEMBERREF table
254 nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
255 name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
257 /* this will triggered by references to mscorlib */
258 if (image->references [scopeindex-1] == NULL)
259 g_error ("Reference to mscorlib? Probably need to implement %s.%s::%s in corlib", nspace, name, fname);
261 mimage = image->references [scopeindex-1]->image;
263 klass = mono_class_from_name (mimage, nspace, name);
264 mono_class_metadata_init (klass);
266 /* mostly dumb search for now */
267 for (i = 0; i < klass->field.count; ++i) {
268 MonoClassField *f = &klass->fields [i];
269 if (!strcmp (fname, f->name)) {
275 g_warning ("Missing field %s.%s::%s", nspace, name, fname);
288 method_from_memberref (MonoImage *image, guint32 index)
292 MonoTableInfo *tables = image->tables;
294 guint32 nindex, class, i;
295 const char *mname, *name, *nspace;
296 MonoMethodSignature *sig;
299 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], index-1, cols, 3);
300 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
301 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
302 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
303 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
305 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
307 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
308 mono_metadata_decode_blob_size (ptr, &ptr);
309 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
312 case MEMBERREF_PARENT_TYPEREF: {
313 guint32 scopeindex, scopetable;
315 mono_metadata_decode_row (&tables [MONO_TABLE_TYPEREF], nindex-1, cols, MONO_TYPEREF_SIZE);
316 scopeindex = cols [MONO_TYPEREF_SCOPE] >> RESOLTION_SCOPE_BITS;
317 scopetable = cols [MONO_TYPEREF_SCOPE] & RESOLTION_SCOPE_MASK;
318 /*g_print ("typeref: 0x%x 0x%x %s.%s\n", scopetable, scopeindex,
319 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAMESPACE]),
320 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAME]));*/
321 switch (scopetable) {
322 case RESOLTION_SCOPE_ASSEMBLYREF:
324 * To find the method we have the following info:
325 * *) name and namespace of the class from the TYPEREF table
326 * *) name and signature of the method from the MEMBERREF table
328 nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
329 name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
331 /* this will triggered by references to mscorlib */
332 if (image->references [scopeindex-1] == NULL)
333 g_error ("Reference to mscorlib? Probably need to implement %s.%s::%s in corlib", nspace, name, mname);
335 mimage = image->references [scopeindex-1]->image;
337 klass = mono_class_from_name (mimage, nspace, name);
338 mono_class_metadata_init (klass);
341 * FIXME: this is a workaround for the different signatures
342 * in delegates constructors you get in user code (native int)
343 * and in mscorlib (native unsigned int)
345 if (klass->parent && klass->parent->parent == mono_defaults.delegate_class) {
346 for (i = 0; i < klass->method.count; ++i) {
347 MonoMethod *m = klass->methods [i];
348 if (!strcmp (mname, m->name)) {
349 if (!strcmp (mname, ".ctor")) {
350 /* we assume signature is correct */
351 mono_metadata_free_method_signature (sig);
354 if (mono_metadata_signature_equal (sig, m->signature)) {
355 mono_metadata_free_method_signature (sig);
361 /* mostly dumb search for now */
362 for (i = 0; i < klass->method.count; ++i) {
363 MonoMethod *m = klass->methods [i];
364 if (!strcmp (mname, m->name)) {
365 if (mono_metadata_signature_equal (sig, m->signature)) {
366 mono_metadata_free_method_signature (sig);
371 g_warning ("Missing method %s.%s::%s", nspace, name, mname);
372 mono_metadata_free_method_signature (sig);
375 mono_metadata_free_method_signature (sig);
380 case MEMBERREF_PARENT_TYPESPEC: {
381 guint32 bcols [MONO_TYPESPEC_SIZE];
386 mono_metadata_decode_row (&tables [MONO_TABLE_TYPESPEC], nindex - 1,
387 bcols, MONO_TYPESPEC_SIZE);
388 ptr = mono_metadata_blob_heap (image, bcols [MONO_TYPESPEC_SIGNATURE]);
389 len = mono_metadata_decode_value (ptr, &ptr);
390 type = mono_metadata_parse_type (image, MONO_PARSE_TYPE, 0, ptr, &ptr);
392 if (type->type != MONO_TYPE_ARRAY)
393 g_assert_not_reached ();
395 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
396 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_SPEC | nindex);
397 result->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
398 result->signature = sig;
399 result->name = mname;
401 if (!strcmp (mname, ".ctor")) {
402 /* we special-case this in the runtime. */
407 if (!strcmp (mname, "Set")) {
408 g_assert (sig->hasthis);
409 g_assert (type->data.array->rank + 1 == sig->param_count);
411 result->addr = mono_lookup_internal_call ("__array_Set");
415 if (!strcmp (mname, "Get")) {
416 g_assert (sig->hasthis);
417 g_assert (type->data.array->rank == sig->param_count);
419 result->addr = mono_lookup_internal_call ("__array_Get");
423 g_assert_not_reached ();
427 g_assert_not_reached ();
434 fill_pinvoke_info (MonoImage *image, MonoMethodPInvoke *piinfo, int index)
436 MonoMethod *mh = &piinfo->method;
437 MonoTableInfo *tables = image->tables;
438 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
439 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
442 const char *import = NULL;
443 const char *scope = NULL;
448 for (i = 0; i < im->rows; i++) {
450 mono_metadata_decode_row (im, i, im_cols, 4);
452 if ((im_cols[1] >> 1) == index + 1) {
454 import = mono_metadata_string_heap (image, im_cols [2]);
456 mono_metadata_decode_row (mr, im_cols [3] - 1, mr_cols,
459 scope = mono_metadata_string_heap (image, mr_cols [0]);
463 piinfo->piflags = im_cols [0];
465 g_assert (import && scope);
467 scope = mono_map_dll (scope);
468 full_name = g_module_build_path (NULL, scope);
469 gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
473 if (!(gmodule=g_module_open (scope, G_MODULE_BIND_LAZY))) {
474 g_warning ("Failed to load library %s (%s)", full_name, scope);
481 g_module_symbol (gmodule, import, &mh->addr);
484 g_warning ("Failed to load function %s from %s", import, scope);
488 mh->flags |= METHOD_ATTRIBUTE_PINVOKE_IMPL;
492 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
495 int table = mono_metadata_token_table (token);
496 int index = mono_metadata_token_index (token);
497 MonoTableInfo *tables = image->tables;
498 const char *loc, *sig = NULL;
501 guint32 cols [MONO_TYPEDEF_SIZE];
503 if ((result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (token))))
506 if (table != MONO_TABLE_METHOD) {
507 g_assert (table == MONO_TABLE_MEMBERREF);
508 result = method_from_memberref (image, index);
509 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
513 mono_metadata_decode_row (&tables [table], index - 1, cols, 6);
515 if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
516 (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
517 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
519 result = (MonoMethod *)g_new0 (MonoMethodNormal, 1);
522 result->klass = klass;
523 result->flags = cols [2];
524 result->iflags = cols [1];
525 result->name = mono_metadata_string_heap (image, cols [3]);
527 if (!sig) /* already taken from the methodref */
528 sig = mono_metadata_blob_heap (image, cols [4]);
529 size = mono_metadata_decode_blob_size (sig, &sig);
530 result->signature = mono_metadata_parse_method_signature (image, 0, sig, NULL);
532 if (!result->klass) {
533 guint32 type = mono_metadata_typedef_from_method (image, token);
534 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
537 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
538 name = g_strconcat (result->klass->name_space, ".", result->klass->name, "::",
539 mono_metadata_string_heap (image, cols [MONO_METHOD_NAME]), NULL);
540 result->addr = mono_lookup_internal_call (name);
542 result->flags |= METHOD_ATTRIBUTE_PINVOKE_IMPL;
543 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
544 fill_pinvoke_info (image, (MonoMethodPInvoke *)result, index - 1);
546 /* if this is a methodref from another module/assembly, this fails */
547 loc = mono_cli_rva_map ((MonoCLIImageInfo *)image->image_info, cols [0]);
549 if (!result->klass->dummy && !(result->flags & METHOD_ATTRIBUTE_ABSTRACT) &&
550 !(result->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME)) {
552 ((MonoMethodNormal *)result)->header = mono_metadata_parse_mh (image, loc);
556 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
562 mono_free_method (MonoMethod *method)
564 mono_metadata_free_method_signature (method->signature);
565 if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
566 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
567 g_free (piinfo->code);
568 } else if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
569 mono_metadata_free_mh (((MonoMethodNormal *)method)->header);