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>
31 MonoDefaults mono_defaults;
33 static char *dll_map[] = {
36 "cygwin1.dll", "libc.so.6",
41 mono_map_dll (const char *name)
46 if (!strcmp (dll_map [i], name))
47 return dll_map [i + 1];
55 mono_typedef_from_name (MonoImage *image, const char *name,
56 const char *nspace, guint32 *mlist)
58 MonoMetadata *m = &image->metadata;
59 MonoTableInfo *t = &m->tables [MONO_TABLE_TYPEDEF];
61 guint32 cols [MONO_TYPEDEF_SIZE];
63 for (i=0; i < t->rows; ++i) {
64 mono_metadata_decode_row (t, i, cols, MONO_TYPEDEF_SIZE);
65 if (strcmp (name, mono_metadata_string_heap (m, cols [MONO_TYPEDEF_NAME])) == 0
66 && strcmp (nspace, mono_metadata_string_heap (m, cols [MONO_TYPEDEF_NAMESPACE])) == 0) {
68 *mlist = cols [MONO_TYPEDEF_METHOD_LIST];
69 return MONO_TOKEN_TYPE_DEF | (i + 1);
72 g_assert_not_reached ();
79 static gboolean initialized = FALSE;
81 enum MonoImageOpenStatus status = MONO_IMAGE_OK;
87 ass = mono_assembly_open (CORLIB_NAME, NULL, &status);
88 g_assert (status == MONO_IMAGE_OK);
89 g_assert (ass != NULL);
90 mono_defaults.corlib = ass->image;
92 mono_defaults.array_token = mono_typedef_from_name (
93 mono_defaults.corlib, "Array", "System", NULL);
94 g_assert (mono_defaults.array_token != 0);
96 mono_defaults.char_token = mono_typedef_from_name (
97 mono_defaults.corlib, "Char", "System", NULL);
98 g_assert (mono_defaults.char_token != 0);
100 mono_defaults.string_token = mono_typedef_from_name (
101 mono_defaults.corlib, "String", "System", NULL);
103 g_assert (mono_defaults.string_token != 0);
108 method_from_memberref (MonoImage *image, guint32 index)
111 MonoMetadata *m = &image->metadata;
112 MonoTableInfo *tables = m->tables;
114 guint32 nindex, class, i;
115 const char *mname, *name, *nspace;
116 MonoMethodSignature *sig, *msig;
119 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], index-1, cols, 3);
120 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
121 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
122 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
123 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
125 mname = mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]);
127 ptr = mono_metadata_blob_heap (m, cols [MONO_MEMBERREF_SIGNATURE]);
128 mono_metadata_decode_blob_size (ptr, &ptr);
129 sig = mono_metadata_parse_method_signature (m, 0, ptr, NULL);
132 case MEMBERREF_PARENT_TYPEREF: {
133 guint32 scopeindex, scopetable;
135 mono_metadata_decode_row (&tables [MONO_TABLE_TYPEREF], nindex-1, cols, MONO_TYPEREF_SIZE);
136 scopeindex = cols [MONO_TYPEREF_SCOPE] >> RESOLTION_SCOPE_BITS;
137 scopetable = cols [MONO_TYPEREF_SCOPE] & RESOLTION_SCOPE_MASK;
138 /*g_print ("typeref: 0x%x 0x%x %s.%s\n", scopetable, scopeindex,
139 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAMESPACE]),
140 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAME]));*/
141 switch (scopetable) {
142 case RESOLTION_SCOPE_ASSEMBLYREF:
144 * To find the method we have the following info:
145 * *) name and namespace of the class from the TYPEREF table
146 * *) name and signature of the method from the MEMBERREF table
148 nspace = mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAMESPACE]);
149 name = mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAME]);
151 /* this will triggered by references to mscorlib */
152 g_assert (image->references [scopeindex-1] != NULL);
154 mimage = image->references [scopeindex-1]->image;
156 m = &mimage->metadata;
157 tables = &m->tables [MONO_TABLE_METHOD];
158 mono_typedef_from_name (mimage, name, nspace, &i);
159 /* mostly dumb search for now */
160 for (i--; i < tables->rows; ++i) {
162 mono_metadata_decode_row (tables, i, cols, MONO_METHOD_SIZE);
164 if (!strcmp (mname, mono_metadata_string_heap (m, cols [MONO_METHOD_NAME]))) {
166 ptr = mono_metadata_blob_heap (m, cols [MONO_METHOD_SIGNATURE]);
167 mono_metadata_decode_blob_size (ptr, &ptr);
168 msig = mono_metadata_parse_method_signature (m, 1, ptr, NULL);
170 if (mono_metadata_signature_equal (&image->metadata, sig,
171 &mimage->metadata, msig)) {
172 mono_metadata_free_method_signature (sig);
173 mono_metadata_free_method_signature (msig);
174 return mono_get_method (mimage, MONO_TOKEN_METHOD_DEF | (i + 1));
178 g_warning ("cant find method %s.%s::%s",nspace, name, mname);
179 g_assert_not_reached ();
182 g_assert_not_reached ();
186 case MEMBERREF_PARENT_TYPESPEC: {
187 guint32 bcols [MONO_TYPESPEC_SIZE];
192 mono_metadata_decode_row (&tables [MONO_TABLE_TYPESPEC], nindex - 1,
193 bcols, MONO_TYPESPEC_SIZE);
194 ptr = mono_metadata_blob_heap (m, bcols [MONO_TYPESPEC_SIGNATURE]);
195 len = mono_metadata_decode_value (ptr, &ptr);
196 type = mono_metadata_parse_type (m, ptr, &ptr);
198 if (type->type != MONO_TYPE_ARRAY)
199 g_assert_not_reached ();
201 result = (MonoMethod *)g_new0 (MonoMethod, 1);
202 result->image = image;
203 result->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
204 result->signature = sig;
206 if (!strcmp (mname, ".ctor")) {
207 g_assert (sig->hasthis);
208 if (type->data.array->rank == sig->param_count) {
209 result->addr = mono_lookup_internal_call ("__array_ctor");
211 } else if ((type->data.array->rank * 2) == sig->param_count) {
212 result->addr = mono_lookup_internal_call ("__array_bound_ctor");
215 g_assert_not_reached ();
218 if (!strcmp (mname, "Set")) {
219 g_assert (sig->hasthis);
220 g_assert (type->data.array->rank + 1 == sig->param_count);
222 result->addr = mono_lookup_internal_call ("__array_Set");
226 if (!strcmp (mname, "Get")) {
227 g_assert (sig->hasthis);
228 g_assert (type->data.array->rank == sig->param_count);
230 result->addr = mono_lookup_internal_call ("__array_Get");
234 g_assert_not_reached ();
238 g_assert_not_reached ();
245 ves_map_ffi_type (MonoType *type)
249 switch (type->type) {
251 rettype = &ffi_type_sint8;
253 case MONO_TYPE_BOOLEAN:
255 rettype = &ffi_type_uint8;
258 rettype = &ffi_type_sint16;
262 rettype = &ffi_type_uint16;
265 rettype = &ffi_type_sint32;
268 rettype = &ffi_type_sint32;
271 rettype = &ffi_type_float;
274 rettype = &ffi_type_double;
276 case MONO_TYPE_STRING:
277 rettype = &ffi_type_pointer;
280 rettype = &ffi_type_void;
283 g_warning ("not implemented");
284 g_assert_not_reached ();
291 fill_pinvoke_info (MonoImage *image, MonoMethodPInvoke *piinfo, int index)
293 MonoMethod *mh = &piinfo->method;
294 MonoTableInfo *tables = image->metadata.tables;
295 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
296 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
299 const char *import = NULL;
300 const char *scope = NULL;
303 ffi_type **args, *rettype;
306 for (i = 0; i < im->rows; i++) {
308 mono_metadata_decode_row (im, i, im_cols, 4);
310 if ((im_cols[1] >> 1) == index + 1) {
312 import = mono_metadata_string_heap (&image->metadata,
315 mono_metadata_decode_row (mr, im_cols [3] - 1, mr_cols,
318 scope = mono_metadata_string_heap (&image->metadata,
323 g_assert (import && scope);
325 scope = mono_map_dll (scope);
326 full_name = g_module_build_path (NULL, scope);
327 gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
332 piinfo->cif = g_new (ffi_cif , 1);
333 piinfo->piflags = im_cols [0];
335 g_module_symbol (gmodule, import, &mh->addr);
339 acount = mh->signature->param_count;
341 args = g_new (ffi_type *, acount);
343 for (i = 0; i < acount; i++)
344 args[i] = ves_map_ffi_type (mh->signature->params [i]->type);
346 rettype = ves_map_ffi_type (mh->signature->ret->type);
348 if (!ffi_prep_cif (piinfo->cif, FFI_DEFAULT_ABI, acount, rettype,
350 g_warning ("prepare pinvoke failed");
351 g_assert_not_reached ();
356 mono_get_method (MonoImage *image, guint32 token)
359 MonoMetadata *m = &image->metadata;
360 int table = mono_metadata_token_table (token);
361 int index = mono_metadata_token_index (token);
362 MonoTableInfo *tables = m->tables;
363 const char *loc, *sig = NULL;
366 guint32 cols[MONO_TYPEDEF_SIZE];
368 if (table == MONO_TABLE_METHOD && (result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (token))))
371 if (table != MONO_TABLE_METHOD) {
372 g_assert (table == MONO_TABLE_MEMBERREF);
373 return method_from_memberref (image, index);
376 mono_metadata_decode_row (&tables [table], index - 1, cols, 6);
378 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
379 MonoTableInfo *t = &m->tables [MONO_TABLE_TYPEDEF];
380 MonoAssembly *corlib;
382 guint32 tdcols [MONO_TYPEDEF_SIZE];
384 tdef = mono_metadata_typedef_from_method (m, index - 1) - 1;
386 mono_metadata_decode_row (t, tdef, tdcols, MONO_TYPEDEF_SIZE);
388 name = g_strconcat (mono_metadata_string_heap (m, tdcols [MONO_TYPEDEF_NAMESPACE]), ".",
389 mono_metadata_string_heap (m, tdcols [MONO_TYPEDEF_NAME]), "::",
390 mono_metadata_string_heap (m, cols [MONO_METHOD_NAME]), NULL);
392 corlib = mono_assembly_open (CORLIB_NAME, NULL, NULL);
394 /* all internal calls must be inside corlib */
395 g_assert (corlib->image == image);
397 result = (MonoMethod *)g_new0 (MonoMethod, 1);
399 result->addr = mono_lookup_internal_call (name);
403 g_assert (result->addr != NULL);
405 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
407 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
410 result = (MonoMethod *)g_new0 (MonoMethodNormal, 1);
413 result->image = image;
414 result->flags = cols [2];
415 result->iflags = cols [1];
416 result->name = mono_metadata_string_heap (m, cols [3]);
418 if (!sig) /* already taken from the methodref */
419 sig = mono_metadata_blob_heap (m, cols [4]);
420 size = mono_metadata_decode_blob_size (sig, &sig);
421 result->signature = mono_metadata_parse_method_signature (m, 0, sig, NULL);
423 if (result->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
424 fill_pinvoke_info (image, (MonoMethodPInvoke *)result,
426 } else if (!(result->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
427 /* if this is a methodref from another module/assembly, this fails */
428 loc = mono_cli_rva_map ((MonoCLIImageInfo *)image->image_info, cols [0]);
430 ((MonoMethodNormal *)result)->header =
431 mono_metadata_parse_mh (m, loc);
434 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
440 mono_free_method (MonoMethod *method)
442 mono_metadata_free_method_signature (method->signature);
443 if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
444 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
445 g_free (piinfo->cif->arg_types);
446 g_free (piinfo->cif);
447 } else if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
448 mono_metadata_free_mh (((MonoMethodNormal *)method)->header);