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 MonoDefaults mono_defaults;
34 static char *dll_map[] = {
37 "cygwin1.dll", "libc.so.6",
42 mono_map_dll (const char *name)
47 if (!strcmp (dll_map [i], name))
48 return dll_map [i + 1];
58 static gboolean initialized = FALSE;
60 enum MonoImageOpenStatus status = MONO_IMAGE_OK;
66 ass = mono_assembly_open (CORLIB_NAME, NULL, &status);
67 g_assert (status == MONO_IMAGE_OK);
68 g_assert (ass != NULL);
69 mono_defaults.corlib = ass->image;
71 mono_defaults.object_class = mono_class_from_name (
72 mono_defaults.corlib, "System", "Object");
73 g_assert (mono_defaults.object_class != 0);
75 mono_defaults.void_class = mono_class_from_name (
76 mono_defaults.corlib, "System", "Void");
77 g_assert (mono_defaults.void_class != 0);
79 mono_defaults.boolean_class = mono_class_from_name (
80 mono_defaults.corlib, "System", "Boolean");
81 g_assert (mono_defaults.boolean_class != 0);
83 mono_defaults.byte_class = mono_class_from_name (
84 mono_defaults.corlib, "System", "Byte");
85 g_assert (mono_defaults.byte_class != 0);
87 mono_defaults.sbyte_class = mono_class_from_name (
88 mono_defaults.corlib, "System", "SByte");
89 g_assert (mono_defaults.sbyte_class != 0);
91 mono_defaults.int16_class = mono_class_from_name (
92 mono_defaults.corlib, "System", "Int16");
93 g_assert (mono_defaults.int16_class != 0);
95 mono_defaults.uint16_class = mono_class_from_name (
96 mono_defaults.corlib, "System", "UInt16");
97 g_assert (mono_defaults.uint16_class != 0);
99 mono_defaults.int32_class = mono_class_from_name (
100 mono_defaults.corlib, "System", "Int32");
101 g_assert (mono_defaults.int32_class != 0);
103 mono_defaults.uint32_class = mono_class_from_name (
104 mono_defaults.corlib, "System", "UInt32");
105 g_assert (mono_defaults.uint32_class != 0);
107 mono_defaults.uint_class = mono_class_from_name (
108 mono_defaults.corlib, "System", "UIntPtr");
109 g_assert (mono_defaults.uint_class != 0);
111 mono_defaults.int_class = mono_class_from_name (
112 mono_defaults.corlib, "System", "IntPtr");
113 g_assert (mono_defaults.int_class != 0);
115 mono_defaults.int64_class = mono_class_from_name (
116 mono_defaults.corlib, "System", "Int64");
117 g_assert (mono_defaults.int64_class != 0);
119 mono_defaults.uint64_class = mono_class_from_name (
120 mono_defaults.corlib, "System", "UInt64");
121 g_assert (mono_defaults.uint64_class != 0);
123 mono_defaults.single_class = mono_class_from_name (
124 mono_defaults.corlib, "System", "Single");
125 g_assert (mono_defaults.single_class != 0);
127 mono_defaults.double_class = mono_class_from_name (
128 mono_defaults.corlib, "System", "Double");
129 g_assert (mono_defaults.double_class != 0);
131 mono_defaults.char_class = mono_class_from_name (
132 mono_defaults.corlib, "System", "Char");
133 g_assert (mono_defaults.char_class != 0);
135 mono_defaults.string_class = mono_class_from_name (
136 mono_defaults.corlib, "System", "String");
137 g_assert (mono_defaults.string_class != 0);
139 mono_defaults.enum_class = mono_class_from_name (
140 mono_defaults.corlib, "System", "Enum");
141 g_assert (mono_defaults.enum_class != 0);
143 mono_defaults.array_class = mono_class_from_name (
144 mono_defaults.corlib, "System", "Array");
145 g_assert (mono_defaults.array_class != 0);
148 static GHashTable *icall_hash = NULL;
151 mono_add_internal_call (const char *name, gpointer method)
154 icall_hash = g_hash_table_new (g_str_hash , g_str_equal);
156 g_hash_table_insert (icall_hash, g_strdup (name), method);
160 mono_lookup_internal_call (const char *name)
165 g_warning ("icall_hash not initialized");
166 g_assert_not_reached ();
169 if (!(res = g_hash_table_lookup (icall_hash, name))) {
170 g_warning ("cant resolve internal call to \"%s\"", name);
171 g_assert_not_reached ();
178 method_from_memberref (MonoImage *image, guint32 index)
182 MonoTableInfo *tables = image->tables;
184 guint32 nindex, class, i;
185 const char *mname, *name, *nspace;
186 MonoMethodSignature *sig;
189 mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], index-1, cols, 3);
190 nindex = cols [MONO_MEMBERREF_CLASS] >> MEMBERREF_PARENT_BITS;
191 class = cols [MONO_MEMBERREF_CLASS] & MEMBERREF_PARENT_MASK;
192 /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
193 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
195 mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
197 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
198 mono_metadata_decode_blob_size (ptr, &ptr);
199 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
202 case MEMBERREF_PARENT_TYPEREF: {
203 guint32 scopeindex, scopetable;
205 mono_metadata_decode_row (&tables [MONO_TABLE_TYPEREF], nindex-1, cols, MONO_TYPEREF_SIZE);
206 scopeindex = cols [MONO_TYPEREF_SCOPE] >> RESOLTION_SCOPE_BITS;
207 scopetable = cols [MONO_TYPEREF_SCOPE] & RESOLTION_SCOPE_MASK;
208 /*g_print ("typeref: 0x%x 0x%x %s.%s\n", scopetable, scopeindex,
209 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAMESPACE]),
210 mono_metadata_string_heap (m, cols [MONO_TYPEREF_NAME]));*/
211 switch (scopetable) {
212 case RESOLTION_SCOPE_ASSEMBLYREF:
214 * To find the method we have the following info:
215 * *) name and namespace of the class from the TYPEREF table
216 * *) name and signature of the method from the MEMBERREF table
218 nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
219 name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
221 /* this will triggered by references to mscorlib */
222 if (image->references [scopeindex-1] == NULL)
223 g_error ("Reference to mscorlib? Probably need to implement %s.%s::%s in corlib", nspace, name, mname);
225 mimage = image->references [scopeindex-1]->image;
227 klass = mono_class_from_name (mimage, nspace, name);
228 mono_class_metadata_init (klass);
230 /* mostly dumb search for now */
231 for (i = 0; i < klass->method.count; ++i) {
232 MonoMethod *m = klass->methods [i];
233 if (!strcmp (mname, m->name)) {
234 if (mono_metadata_signature_equal (sig, m->signature)) {
235 mono_metadata_free_method_signature (sig);
240 g_warning ("can't find method %s.%s::%s", nspace, name, mname);
241 g_assert_not_reached ();
244 g_assert_not_reached ();
248 case MEMBERREF_PARENT_TYPESPEC: {
249 guint32 bcols [MONO_TYPESPEC_SIZE];
254 mono_metadata_decode_row (&tables [MONO_TABLE_TYPESPEC], nindex - 1,
255 bcols, MONO_TYPESPEC_SIZE);
256 ptr = mono_metadata_blob_heap (image, bcols [MONO_TYPESPEC_SIGNATURE]);
257 len = mono_metadata_decode_value (ptr, &ptr);
258 type = mono_metadata_parse_type (image, MONO_PARSE_TYPE, 0, ptr, &ptr);
260 if (type->type != MONO_TYPE_ARRAY)
261 g_assert_not_reached ();
263 result = (MonoMethod *)g_new0 (MonoMethod, 1);
264 result->klass = mono_defaults.array_class;
265 result->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
266 result->signature = sig;
268 if (!strcmp (mname, ".ctor")) {
269 g_assert (sig->hasthis);
270 if (type->data.array->rank == sig->param_count) {
271 result->addr = mono_lookup_internal_call ("__array_ctor");
273 } else if ((type->data.array->rank * 2) == sig->param_count) {
274 result->addr = mono_lookup_internal_call ("__array_bound_ctor");
277 g_assert_not_reached ();
280 if (!strcmp (mname, "Set")) {
281 g_assert (sig->hasthis);
282 g_assert (type->data.array->rank + 1 == sig->param_count);
284 result->addr = mono_lookup_internal_call ("__array_Set");
288 if (!strcmp (mname, "Get")) {
289 g_assert (sig->hasthis);
290 g_assert (type->data.array->rank == sig->param_count);
292 result->addr = mono_lookup_internal_call ("__array_Get");
296 g_assert_not_reached ();
300 g_assert_not_reached ();
307 ves_map_ffi_type (MonoType *type)
311 switch (type->type) {
313 rettype = &ffi_type_sint8;
315 case MONO_TYPE_BOOLEAN:
317 rettype = &ffi_type_uint8;
320 rettype = &ffi_type_sint16;
324 rettype = &ffi_type_uint16;
327 rettype = &ffi_type_sint32;
330 rettype = &ffi_type_sint32;
333 rettype = &ffi_type_sint;
336 rettype = &ffi_type_sint;
339 rettype = &ffi_type_sint64;
342 rettype = &ffi_type_pointer;
345 rettype = &ffi_type_float;
348 rettype = &ffi_type_double;
350 case MONO_TYPE_STRING:
351 rettype = &ffi_type_pointer;
354 rettype = &ffi_type_void;
357 g_warning ("not implemented 0x%02x", type->type);
358 g_assert_not_reached ();
365 fill_pinvoke_info (MonoImage *image, MonoMethodPInvoke *piinfo, int index)
367 MonoMethod *mh = &piinfo->method;
368 MonoTableInfo *tables = image->tables;
369 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
370 MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
373 const char *import = NULL;
374 const char *scope = NULL;
377 ffi_type **args, *rettype;
380 for (i = 0; i < im->rows; i++) {
382 mono_metadata_decode_row (im, i, im_cols, 4);
384 if ((im_cols[1] >> 1) == index + 1) {
386 import = mono_metadata_string_heap (image, im_cols [2]);
388 mono_metadata_decode_row (mr, im_cols [3] - 1, mr_cols,
391 scope = mono_metadata_string_heap (image, mr_cols [0]);
395 g_assert (import && scope);
397 scope = mono_map_dll (scope);
398 full_name = g_module_build_path (NULL, scope);
399 gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
402 g_error ("Failed to load library %s (%s)", full_name, scope);
405 piinfo->cif = g_new (ffi_cif , 1);
406 piinfo->piflags = im_cols [0];
408 g_module_symbol (gmodule, import, &mh->addr);
412 acount = mh->signature->param_count;
414 args = g_new (ffi_type *, acount);
416 for (i = 0; i < acount; i++)
417 args[i] = ves_map_ffi_type (mh->signature->params [i]);
419 rettype = ves_map_ffi_type (mh->signature->ret);
421 if (!ffi_prep_cif (piinfo->cif, FFI_DEFAULT_ABI, acount, rettype,
423 g_warning ("prepare pinvoke failed");
424 g_assert_not_reached ();
429 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
432 int table = mono_metadata_token_table (token);
433 int index = mono_metadata_token_index (token);
434 MonoTableInfo *tables = image->tables;
435 const char *loc, *sig = NULL;
438 guint32 cols [MONO_TYPEDEF_SIZE];
440 if (table == MONO_TABLE_METHOD && (result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (token))))
443 if (table != MONO_TABLE_METHOD) {
444 g_assert (table == MONO_TABLE_MEMBERREF);
445 return method_from_memberref (image, index);
448 mono_metadata_decode_row (&tables [table], index - 1, cols, 6);
450 if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
451 MonoTableInfo *t = &image->tables [MONO_TABLE_TYPEDEF];
452 MonoAssembly *corlib;
454 guint32 tdcols [MONO_TYPEDEF_SIZE];
456 tdef = mono_metadata_typedef_from_method (image, index - 1) - 1;
458 mono_metadata_decode_row (t, tdef, tdcols, MONO_TYPEDEF_SIZE);
460 name = g_strconcat (mono_metadata_string_heap (image, tdcols [MONO_TYPEDEF_NAMESPACE]), ".",
461 mono_metadata_string_heap (image, tdcols [MONO_TYPEDEF_NAME]), "::",
462 mono_metadata_string_heap (image, cols [MONO_METHOD_NAME]), NULL);
464 corlib = mono_assembly_open (CORLIB_NAME, NULL, NULL);
466 /* all internal calls must be inside corlib */
467 g_assert (corlib->image == image);
469 result = (MonoMethod *)g_new0 (MonoMethod, 1);
471 result->addr = mono_lookup_internal_call (name);
475 g_assert (result->addr != NULL);
477 } else if (cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
479 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
482 result = (MonoMethod *)g_new0 (MonoMethodNormal, 1);
485 result->klass = klass;
486 result->flags = cols [2];
487 result->iflags = cols [1];
488 result->name = mono_metadata_string_heap (image, cols [3]);
490 if (!sig) /* already taken from the methodref */
491 sig = mono_metadata_blob_heap (image, cols [4]);
492 size = mono_metadata_decode_blob_size (sig, &sig);
493 result->signature = mono_metadata_parse_method_signature (image, 0, sig, NULL);
495 if (!result->klass) {
496 guint32 type = mono_metadata_typedef_from_method (image, token);
497 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
500 if (result->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
501 fill_pinvoke_info (image, (MonoMethodPInvoke *)result,
503 } else if (!(result->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
504 /* if this is a methodref from another module/assembly, this fails */
505 loc = mono_cli_rva_map ((MonoCLIImageInfo *)image->image_info, cols [0]);
507 if (!result->klass->dummy && !(result->flags & METHOD_ATTRIBUTE_ABSTRACT)) {
509 ((MonoMethodNormal *)result)->header = mono_metadata_parse_mh (image, loc);
513 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
519 mono_free_method (MonoMethod *method)
521 mono_metadata_free_method_signature (method->signature);
522 if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
523 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
524 g_free (piinfo->cif->arg_types);
525 g_free (piinfo->cif);
526 } else if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
527 mono_metadata_free_mh (((MonoMethodNormal *)method)->header);