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2009-12-01 Jb Evain <jbevain@novell.com>
[mono.git] / mono / metadata / metadata.c
blobac5296ac1fb8bb80b359dcb6a75b6d852d4b1fb1
1 /*
2 * metadata.c: Routines for accessing the metadata
3 *
4 * Authors:
5 * Miguel de Icaza (miguel@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 *
8 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
9 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
10 */
11
12 #include <config.h>
13 #ifdef HAVE_ALLOCA_H
14 #include <alloca.h>
15 #endif
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <string.h>
19 #include <glib.h>
20 #include "metadata.h"
21 #include "tabledefs.h"
22 #include "mono-endian.h"
23 #include "cil-coff.h"
24 #include "tokentype.h"
25 #include "metadata-internals.h"
26 #include "class-internals.h"
27 #include "verify-internals.h"
28 #include "class.h"
29 #include "marshal.h"
30 #include "gc-internal.h"
31 #include <mono/utils/mono-error-internals.h>
32
33
34 static gboolean do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
35 const char *ptr, const char **rptr);
36
37 static gboolean do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only);
38 static gboolean mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only);
39 static gboolean mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only);
40 static gboolean _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2,
41 gboolean signature_only);
42 static void free_generic_inst (MonoGenericInst *ginst);
43 static void free_generic_class (MonoGenericClass *ginst);
44 static void free_inflated_method (MonoMethodInflated *method);
45 static void mono_metadata_field_info_full (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva, MonoMarshalSpec **marshal_spec, gboolean alloc_from_image);
46
47 /*
48 * This enumeration is used to describe the data types in the metadata
49 * tables
50 */
51 enum {
52 MONO_MT_END,
53
54 /* Sized elements */
55 MONO_MT_UINT32,
56 MONO_MT_UINT16,
57 MONO_MT_UINT8,
58
59 /* Index into Blob heap */
60 MONO_MT_BLOB_IDX,
61
62 /* Index into String heap */
63 MONO_MT_STRING_IDX,
64
65 /* GUID index */
66 MONO_MT_GUID_IDX,
67
68 /* Pointer into a table */
69 MONO_MT_TABLE_IDX,
70
71 /* HasConstant:Parent pointer (Param, Field or Property) */
72 MONO_MT_CONST_IDX,
73
74 /* HasCustomAttribute index. Indexes any table except CustomAttribute */
75 MONO_MT_HASCAT_IDX,
76
77 /* CustomAttributeType encoded index */
78 MONO_MT_CAT_IDX,
79
80 /* HasDeclSecurity index: TypeDef Method or Assembly */
81 MONO_MT_HASDEC_IDX,
82
83 /* Implementation coded index: File, Export AssemblyRef */
84 MONO_MT_IMPL_IDX,
85
86 /* HasFieldMarshal coded index: Field or Param table */
87 MONO_MT_HFM_IDX,
88
89 /* MemberForwardedIndex: Field or Method */
90 MONO_MT_MF_IDX,
91
92 /* TypeDefOrRef coded index: typedef, typeref, typespec */
93 MONO_MT_TDOR_IDX,
94
95 /* MemberRefParent coded index: typeref, moduleref, method, memberref, typesepc, typedef */
96 MONO_MT_MRP_IDX,
97
98 /* MethodDefOrRef coded index: Method or Member Ref table */
99 MONO_MT_MDOR_IDX,
100
101 /* HasSemantic coded index: Event or Property */
102 MONO_MT_HS_IDX,
103
104 /* ResolutionScope coded index: Module, ModuleRef, AssemblytRef, TypeRef */
105 MONO_MT_RS_IDX
106 };
107
108 const static unsigned char TableSchemas [] = {
109 #define ASSEMBLY_SCHEMA_OFFSET 0
110 MONO_MT_UINT32, /* "HashId" }, */
111 MONO_MT_UINT16, /* "Major" }, */
112 MONO_MT_UINT16, /* "Minor" }, */
113 MONO_MT_UINT16, /* "BuildNumber" }, */
114 MONO_MT_UINT16, /* "RevisionNumber" }, */
115 MONO_MT_UINT32, /* "Flags" }, */
116 MONO_MT_BLOB_IDX, /* "PublicKey" }, */
117 MONO_MT_STRING_IDX, /* "Name" }, */
118 MONO_MT_STRING_IDX, /* "Culture" }, */
119 MONO_MT_END,
120
121 #define ASSEMBLYOS_SCHEMA_OFFSET ASSEMBLY_SCHEMA_OFFSET + 10
122 MONO_MT_UINT32, /* "OSPlatformID" }, */
123 MONO_MT_UINT32, /* "OSMajor" }, */
124 MONO_MT_UINT32, /* "OSMinor" }, */
125 MONO_MT_END,
126
127 #define ASSEMBLYPROC_SCHEMA_OFFSET ASSEMBLYOS_SCHEMA_OFFSET + 4
128 MONO_MT_UINT32, /* "Processor" }, */
129 MONO_MT_END,
130
131 #define ASSEMBLYREF_SCHEMA_OFFSET ASSEMBLYPROC_SCHEMA_OFFSET + 2
132 MONO_MT_UINT16, /* "Major" }, */
133 MONO_MT_UINT16, /* "Minor" }, */
134 MONO_MT_UINT16, /* "Build" }, */
135 MONO_MT_UINT16, /* "Revision" }, */
136 MONO_MT_UINT32, /* "Flags" }, */
137 MONO_MT_BLOB_IDX, /* "PublicKeyOrToken" }, */
138 MONO_MT_STRING_IDX, /* "Name" }, */
139 MONO_MT_STRING_IDX, /* "Culture" }, */
140 MONO_MT_BLOB_IDX, /* "HashValue" }, */
141 MONO_MT_END,
142
143 #define ASSEMBLYREFOS_SCHEMA_OFFSET ASSEMBLYREF_SCHEMA_OFFSET + 10
144 MONO_MT_UINT32, /* "OSPlatformID" }, */
145 MONO_MT_UINT32, /* "OSMajorVersion" }, */
146 MONO_MT_UINT32, /* "OSMinorVersion" }, */
147 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
148 MONO_MT_END,
149
150 #define ASSEMBLYREFPROC_SCHEMA_OFFSET ASSEMBLYREFOS_SCHEMA_OFFSET + 5
151 MONO_MT_UINT32, /* "Processor" }, */
152 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
153 MONO_MT_END,
154
155 #define CLASS_LAYOUT_SCHEMA_OFFSET ASSEMBLYREFPROC_SCHEMA_OFFSET + 3
156 MONO_MT_UINT16, /* "PackingSize" }, */
157 MONO_MT_UINT32, /* "ClassSize" }, */
158 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
159 MONO_MT_END,
160
161 #define CONSTANT_SCHEMA_OFFSET CLASS_LAYOUT_SCHEMA_OFFSET + 4
162 MONO_MT_UINT8, /* "Type" }, */
163 MONO_MT_UINT8, /* "PaddingZero" }, */
164 MONO_MT_CONST_IDX, /* "Parent" }, */
165 MONO_MT_BLOB_IDX, /* "Value" }, */
166 MONO_MT_END,
167
168 #define CUSTOM_ATTR_SCHEMA_OFFSET CONSTANT_SCHEMA_OFFSET + 5
169 MONO_MT_HASCAT_IDX, /* "Parent" }, */
170 MONO_MT_CAT_IDX, /* "Type" }, */
171 MONO_MT_BLOB_IDX, /* "Value" }, */
172 MONO_MT_END,
173
174 #define DECL_SEC_SCHEMA_OFFSET CUSTOM_ATTR_SCHEMA_OFFSET + 4
175 MONO_MT_UINT16, /* "Action" }, */
176 MONO_MT_HASDEC_IDX, /* "Parent" }, */
177 MONO_MT_BLOB_IDX, /* "PermissionSet" }, */
178 MONO_MT_END,
179
180 #define EVENTMAP_SCHEMA_OFFSET DECL_SEC_SCHEMA_OFFSET + 4
181 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
182 MONO_MT_TABLE_IDX, /* "EventList:Event" }, */
183 MONO_MT_END,
184
185 #define EVENT_SCHEMA_OFFSET EVENTMAP_SCHEMA_OFFSET + 3
186 MONO_MT_UINT16, /* "EventFlags#EventAttribute" }, */
187 MONO_MT_STRING_IDX, /* "Name" }, */
188 MONO_MT_TDOR_IDX, /* "EventType" }, TypeDef or TypeRef or TypeSpec */
189 MONO_MT_END,
190
191 #define EVENT_POINTER_SCHEMA_OFFSET EVENT_SCHEMA_OFFSET + 4
192 MONO_MT_TABLE_IDX, /* "Event" }, */
193 MONO_MT_END,
194
195 #define EXPORTED_TYPE_SCHEMA_OFFSET EVENT_POINTER_SCHEMA_OFFSET + 2
196 MONO_MT_UINT32, /* "Flags" }, */
197 MONO_MT_TABLE_IDX, /* "TypeDefId" }, */
198 MONO_MT_STRING_IDX, /* "TypeName" }, */
199 MONO_MT_STRING_IDX, /* "TypeNameSpace" }, */
200 MONO_MT_IMPL_IDX, /* "Implementation" }, */
201 MONO_MT_END,
202
203 #define FIELD_SCHEMA_OFFSET EXPORTED_TYPE_SCHEMA_OFFSET + 6
204 MONO_MT_UINT16, /* "Flags" }, */
205 MONO_MT_STRING_IDX, /* "Name" }, */
206 MONO_MT_BLOB_IDX, /* "Signature" }, */
207 MONO_MT_END,
208
209 #define FIELD_LAYOUT_SCHEMA_OFFSET FIELD_SCHEMA_OFFSET + 4
210 MONO_MT_UINT32, /* "Offset" }, */
211 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
212 MONO_MT_END,
213
214 #define FIELD_MARSHAL_SCHEMA_OFFSET FIELD_LAYOUT_SCHEMA_OFFSET + 3
215 MONO_MT_HFM_IDX, /* "Parent" }, */
216 MONO_MT_BLOB_IDX, /* "NativeType" }, */
217 MONO_MT_END,
218
219 #define FIELD_RVA_SCHEMA_OFFSET FIELD_MARSHAL_SCHEMA_OFFSET + 3
220 MONO_MT_UINT32, /* "RVA" }, */
221 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
222 MONO_MT_END,
223
224 #define FIELD_POINTER_SCHEMA_OFFSET FIELD_RVA_SCHEMA_OFFSET + 3
225 MONO_MT_TABLE_IDX, /* "Field" }, */
226 MONO_MT_END,
227
228 #define FILE_SCHEMA_OFFSET FIELD_POINTER_SCHEMA_OFFSET + 2
229 MONO_MT_UINT32, /* "Flags" }, */
230 MONO_MT_STRING_IDX, /* "Name" }, */
231 MONO_MT_BLOB_IDX, /* "Value" }, */
232 MONO_MT_END,
233
234 #define IMPLMAP_SCHEMA_OFFSET FILE_SCHEMA_OFFSET + 4
235 MONO_MT_UINT16, /* "MappingFlag" }, */
236 MONO_MT_MF_IDX, /* "MemberForwarded" }, */
237 MONO_MT_STRING_IDX, /* "ImportName" }, */
238 MONO_MT_TABLE_IDX, /* "ImportScope:ModuleRef" }, */
239 MONO_MT_END,
240
241 #define IFACEMAP_SCHEMA_OFFSET IMPLMAP_SCHEMA_OFFSET + 5
242 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
243 MONO_MT_TDOR_IDX, /* "Interface=TypeDefOrRef" }, */
244 MONO_MT_END,
245
246 #define MANIFEST_SCHEMA_OFFSET IFACEMAP_SCHEMA_OFFSET + 3
247 MONO_MT_UINT32, /* "Offset" }, */
248 MONO_MT_UINT32, /* "Flags" }, */
249 MONO_MT_STRING_IDX, /* "Name" }, */
250 MONO_MT_IMPL_IDX, /* "Implementation" }, */
251 MONO_MT_END,
252
253 #define MEMBERREF_SCHEMA_OFFSET MANIFEST_SCHEMA_OFFSET + 5
254 MONO_MT_MRP_IDX, /* "Class" }, */
255 MONO_MT_STRING_IDX, /* "Name" }, */
256 MONO_MT_BLOB_IDX, /* "Signature" }, */
257 MONO_MT_END,
258
259 #define METHOD_SCHEMA_OFFSET MEMBERREF_SCHEMA_OFFSET + 4
260 MONO_MT_UINT32, /* "RVA" }, */
261 MONO_MT_UINT16, /* "ImplFlags#MethodImplAttributes" }, */
262 MONO_MT_UINT16, /* "Flags#MethodAttribute" }, */
263 MONO_MT_STRING_IDX, /* "Name" }, */
264 MONO_MT_BLOB_IDX, /* "Signature" }, */
265 MONO_MT_TABLE_IDX, /* "ParamList:Param" }, */
266 MONO_MT_END,
267
268 #define METHOD_IMPL_SCHEMA_OFFSET METHOD_SCHEMA_OFFSET + 7
269 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
270 MONO_MT_MDOR_IDX, /* "MethodBody" }, */
271 MONO_MT_MDOR_IDX, /* "MethodDeclaration" }, */
272 MONO_MT_END,
273
274 #define METHOD_SEMA_SCHEMA_OFFSET METHOD_IMPL_SCHEMA_OFFSET + 4
275 MONO_MT_UINT16, /* "MethodSemantic" }, */
276 MONO_MT_TABLE_IDX, /* "Method:Method" }, */
277 MONO_MT_HS_IDX, /* "Association" }, */
278 MONO_MT_END,
279
280 #define METHOD_POINTER_SCHEMA_OFFSET METHOD_SEMA_SCHEMA_OFFSET + 4
281 MONO_MT_TABLE_IDX, /* "Method" }, */
282 MONO_MT_END,
283
284 #define MODULE_SCHEMA_OFFSET METHOD_POINTER_SCHEMA_OFFSET + 2
285 MONO_MT_UINT16, /* "Generation" }, */
286 MONO_MT_STRING_IDX, /* "Name" }, */
287 MONO_MT_GUID_IDX, /* "MVID" }, */
288 MONO_MT_GUID_IDX, /* "EncID" }, */
289 MONO_MT_GUID_IDX, /* "EncBaseID" }, */
290 MONO_MT_END,
291
292 #define MODULEREF_SCHEMA_OFFSET MODULE_SCHEMA_OFFSET + 6
293 MONO_MT_STRING_IDX, /* "Name" }, */
294 MONO_MT_END,
295
296 #define NESTED_CLASS_SCHEMA_OFFSET MODULEREF_SCHEMA_OFFSET + 2
297 MONO_MT_TABLE_IDX, /* "NestedClass:TypeDef" }, */
298 MONO_MT_TABLE_IDX, /* "EnclosingClass:TypeDef" }, */
299 MONO_MT_END,
300
301 #define PARAM_SCHEMA_OFFSET NESTED_CLASS_SCHEMA_OFFSET + 3
302 MONO_MT_UINT16, /* "Flags" }, */
303 MONO_MT_UINT16, /* "Sequence" }, */
304 MONO_MT_STRING_IDX, /* "Name" }, */
305 MONO_MT_END,
306
307 #define PARAM_POINTER_SCHEMA_OFFSET PARAM_SCHEMA_OFFSET + 4
308 MONO_MT_TABLE_IDX, /* "Param" }, */
309 MONO_MT_END,
310
311 #define PROPERTY_SCHEMA_OFFSET PARAM_POINTER_SCHEMA_OFFSET + 2
312 MONO_MT_UINT16, /* "Flags" }, */
313 MONO_MT_STRING_IDX, /* "Name" }, */
314 MONO_MT_BLOB_IDX, /* "Type" }, */
315 MONO_MT_END,
316
317 #define PROPERTY_POINTER_SCHEMA_OFFSET PROPERTY_SCHEMA_OFFSET + 4
318 MONO_MT_TABLE_IDX, /* "Property" }, */
319 MONO_MT_END,
320
321 #define PROPERTY_MAP_SCHEMA_OFFSET PROPERTY_POINTER_SCHEMA_OFFSET + 2
322 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
323 MONO_MT_TABLE_IDX, /* "PropertyList:Property" }, */
324 MONO_MT_END,
325
326 #define STDALON_SIG_SCHEMA_OFFSET PROPERTY_MAP_SCHEMA_OFFSET + 3
327 MONO_MT_BLOB_IDX, /* "Signature" }, */
328 MONO_MT_END,
329
330 #define TYPEDEF_SCHEMA_OFFSET STDALON_SIG_SCHEMA_OFFSET + 2
331 MONO_MT_UINT32, /* "Flags" }, */
332 MONO_MT_STRING_IDX, /* "Name" }, */
333 MONO_MT_STRING_IDX, /* "Namespace" }, */
334 MONO_MT_TDOR_IDX, /* "Extends" }, */
335 MONO_MT_TABLE_IDX, /* "FieldList:Field" }, */
336 MONO_MT_TABLE_IDX, /* "MethodList:Method" }, */
337 MONO_MT_END,
338
339 #define TYPEREF_SCHEMA_OFFSET TYPEDEF_SCHEMA_OFFSET + 7
340 MONO_MT_RS_IDX, /* "ResolutionScope=ResolutionScope" }, */
341 MONO_MT_STRING_IDX, /* "Name" }, */
342 MONO_MT_STRING_IDX, /* "Namespace" }, */
343 MONO_MT_END,
344
345 #define TYPESPEC_SCHEMA_OFFSET TYPEREF_SCHEMA_OFFSET + 4
346 MONO_MT_BLOB_IDX, /* "Signature" }, */
347 MONO_MT_END,
348
349 #define GENPARAM_SCHEMA_OFFSET TYPESPEC_SCHEMA_OFFSET + 2
350 MONO_MT_UINT16, /* "Number" }, */
351 MONO_MT_UINT16, /* "Flags" }, */
352 MONO_MT_TABLE_IDX, /* "Owner" }, TypeDef or MethodDef */
353 MONO_MT_STRING_IDX, /* "Name" }, */
354 MONO_MT_END,
355
356 #define METHOD_SPEC_SCHEMA_OFFSET GENPARAM_SCHEMA_OFFSET + 5
357 MONO_MT_MDOR_IDX, /* "Method" }, */
358 MONO_MT_BLOB_IDX, /* "Signature" }, */
359 MONO_MT_END,
360
361 #define GEN_CONSTRAINT_SCHEMA_OFFSET METHOD_SPEC_SCHEMA_OFFSET + 3
362 MONO_MT_TABLE_IDX, /* "GenericParam" }, */
363 MONO_MT_TDOR_IDX, /* "Constraint" }, */
364 MONO_MT_END,
365
366 #define NULL_SCHEMA_OFFSET GEN_CONSTRAINT_SCHEMA_OFFSET + 3
367 MONO_MT_END
368 };
369
370 /* Must be the same order as MONO_TABLE_* */
371 const static unsigned char
372 table_description [] = {
373 MODULE_SCHEMA_OFFSET,
374 TYPEREF_SCHEMA_OFFSET,
375 TYPEDEF_SCHEMA_OFFSET,
376 FIELD_POINTER_SCHEMA_OFFSET,
377 FIELD_SCHEMA_OFFSET,
378 METHOD_POINTER_SCHEMA_OFFSET,
379 METHOD_SCHEMA_OFFSET,
380 PARAM_POINTER_SCHEMA_OFFSET,
381 PARAM_SCHEMA_OFFSET,
382 IFACEMAP_SCHEMA_OFFSET,
383 MEMBERREF_SCHEMA_OFFSET, /* 0xa */
384 CONSTANT_SCHEMA_OFFSET,
385 CUSTOM_ATTR_SCHEMA_OFFSET,
386 FIELD_MARSHAL_SCHEMA_OFFSET,
387 DECL_SEC_SCHEMA_OFFSET,
388 CLASS_LAYOUT_SCHEMA_OFFSET,
389 FIELD_LAYOUT_SCHEMA_OFFSET, /* 0x10 */
390 STDALON_SIG_SCHEMA_OFFSET,
391 EVENTMAP_SCHEMA_OFFSET,
392 EVENT_POINTER_SCHEMA_OFFSET,
393 EVENT_SCHEMA_OFFSET,
394 PROPERTY_MAP_SCHEMA_OFFSET,
395 PROPERTY_POINTER_SCHEMA_OFFSET,
396 PROPERTY_SCHEMA_OFFSET,
397 METHOD_SEMA_SCHEMA_OFFSET,
398 METHOD_IMPL_SCHEMA_OFFSET,
399 MODULEREF_SCHEMA_OFFSET, /* 0x1a */
400 TYPESPEC_SCHEMA_OFFSET,
401 IMPLMAP_SCHEMA_OFFSET,
402 FIELD_RVA_SCHEMA_OFFSET,
403 NULL_SCHEMA_OFFSET,
404 NULL_SCHEMA_OFFSET,
405 ASSEMBLY_SCHEMA_OFFSET, /* 0x20 */
406 ASSEMBLYPROC_SCHEMA_OFFSET,
407 ASSEMBLYOS_SCHEMA_OFFSET,
408 ASSEMBLYREF_SCHEMA_OFFSET,
409 ASSEMBLYREFPROC_SCHEMA_OFFSET,
410 ASSEMBLYREFOS_SCHEMA_OFFSET,
411 FILE_SCHEMA_OFFSET,
412 EXPORTED_TYPE_SCHEMA_OFFSET,
413 MANIFEST_SCHEMA_OFFSET,
414 NESTED_CLASS_SCHEMA_OFFSET,
415 GENPARAM_SCHEMA_OFFSET, /* 0x2a */
416 METHOD_SPEC_SCHEMA_OFFSET,
417 GEN_CONSTRAINT_SCHEMA_OFFSET
418 };
419
420 #ifdef HAVE_ARRAY_ELEM_INIT
421 #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
422 #define MSGSTRFIELD1(line) str##line
423 static const struct msgstr_t {
424 #define TABLEDEF(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
425 #include "mono/cil/tables.def"
426 #undef TABLEDEF
427 } tablestr = {
428 #define TABLEDEF(a,b) b,
429 #include "mono/cil/tables.def"
430 #undef TABLEDEF
431 };
432 static const gint16 tableidx [] = {
433 #define TABLEDEF(a,b) [a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
434 #include "mono/cil/tables.def"
435 #undef TABLEDEF
436 };
437
438 #else
439 #define TABLEDEF(a,b) b,
440 static const char* const
441 mono_tables_names [] = {
442 #include "mono/cil/tables.def"
443 NULL
444 };
445
446 #endif
447
448 /* Auxiliary structure used for caching inflated signatures */
449 typedef struct {
450 MonoMethodSignature *sig;
451 MonoGenericContext context;
452 } MonoInflatedMethodSignature;
453
454 /**
455 * mono_meta_table_name:
456 * @table: table index
457 *
458 * Returns the name of the given ECMA metadata logical format table
459 * as described in ECMA 335, Partition II, Section 22.
460 *
461 * Returns: the name for the @table index
462 */
463 const char *
464 mono_meta_table_name (int table)
465 {
466 if ((table < 0) || (table > MONO_TABLE_LAST))
467 return "";
468
469 #ifdef HAVE_ARRAY_ELEM_INIT
470 return (const char*)&tablestr + tableidx [table];
471 #else
472 return mono_tables_names [table];
473 #endif
474 }
475
476 /* The guy who wrote the spec for this should not be allowed near a
477 * computer again.
478
479 If e is a coded token(see clause 23.1.7) that points into table ti out of n possible tables t0, .. tn-1,
480 then it is stored as e << (log n) & tag{ t0, .. tn-1}[ ti] using 2 bytes if the maximum number of
481 rows of tables t0, ..tn-1, is less than 2^16 - (log n), and using 4 bytes otherwise. The family of
482 finite maps tag{ t0, ..tn-1} is defined below. Note that to decode a physical row, you need the
483 inverse of this mapping.
484
485 */
486 #define rtsize(s,b) (((s) < (1 << (b)) ? 2 : 4))
487 #define idx_size(tableidx) (meta->tables [(tableidx)].rows < 65536 ? 2 : 4)
488
489 /* Reference: Partition II - 23.2.6 */
490 /*
491 * mono_metadata_compute_size:
492 * @meta: metadata context
493 * @tableindex: metadata table number
494 * @result_bitfield: pointer to guint32 where to store additional info
495 *
496 * mono_metadata_compute_size() computes the lenght in bytes of a single
497 * row in a metadata table. The size of each column is encoded in the
498 * @result_bitfield return value along with the number of columns in the table.
499 * the resulting bitfield should be handed to the mono_metadata_table_size()
500 * and mono_metadata_table_count() macros.
501 * This is a Mono runtime internal only function.
502 */
503 int
504 mono_metadata_compute_size (MonoImage *meta, int tableindex, guint32 *result_bitfield)
505 {
506 guint32 bitfield = 0;
507 int size = 0, field_size = 0;
508 int i, n, code;
509 int shift = 0;
510 const unsigned char *description = TableSchemas + table_description [tableindex];
511
512 for (i = 0; (code = description [i]) != MONO_MT_END; i++){
513 switch (code){
514 case MONO_MT_UINT32:
515 field_size = 4; break;
516
517 case MONO_MT_UINT16:
518 field_size = 2; break;
519
520 case MONO_MT_UINT8:
521 field_size = 1; break;
522
523 case MONO_MT_BLOB_IDX:
524 field_size = meta->idx_blob_wide ? 4 : 2; break;
525
526 case MONO_MT_STRING_IDX:
527 field_size = meta->idx_string_wide ? 4 : 2; break;
528
529 case MONO_MT_GUID_IDX:
530 field_size = meta->idx_guid_wide ? 4 : 2; break;
531
532 case MONO_MT_TABLE_IDX:
533 /* Uhm, a table index can point to other tables besides the current one
534 * so, it's not correct to use the rowcount of the current table to
535 * get the size for this column - lupus
536 */
537 switch (tableindex) {
538 case MONO_TABLE_ASSEMBLYREFOS:
539 g_assert (i == 3);
540 field_size = idx_size (MONO_TABLE_ASSEMBLYREF); break;
541 case MONO_TABLE_ASSEMBLYREFPROCESSOR:
542 g_assert (i == 1);
543 field_size = idx_size (MONO_TABLE_ASSEMBLYREF); break;
544 case MONO_TABLE_CLASSLAYOUT:
545 g_assert (i == 2);
546 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
547 case MONO_TABLE_EVENTMAP:
548 g_assert (i == 0 || i == 1);
549 field_size = i ? idx_size (MONO_TABLE_EVENT):
550 idx_size(MONO_TABLE_TYPEDEF);
551 break;
552 case MONO_TABLE_EVENT_POINTER:
553 g_assert (i == 0);
554 field_size = idx_size (MONO_TABLE_EVENT); break;
555 case MONO_TABLE_EXPORTEDTYPE:
556 g_assert (i == 1);
557 /* the index is in another metadata file, so it must be 4 */
558 field_size = 4; break;
559 case MONO_TABLE_FIELDLAYOUT:
560 g_assert (i == 1);
561 field_size = idx_size (MONO_TABLE_FIELD); break;
562 case MONO_TABLE_FIELDRVA:
563 g_assert (i == 1);
564 field_size = idx_size (MONO_TABLE_FIELD); break;
565 case MONO_TABLE_FIELD_POINTER:
566 g_assert (i == 0);
567 field_size = idx_size (MONO_TABLE_FIELD); break;
568 case MONO_TABLE_IMPLMAP:
569 g_assert (i == 3);
570 field_size = idx_size (MONO_TABLE_MODULEREF); break;
571 case MONO_TABLE_INTERFACEIMPL:
572 g_assert (i == 0);
573 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
574 case MONO_TABLE_METHOD:
575 g_assert (i == 5);
576 field_size = idx_size (MONO_TABLE_PARAM); break;
577 case MONO_TABLE_METHODIMPL:
578 g_assert (i == 0);
579 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
580 case MONO_TABLE_METHODSEMANTICS:
581 g_assert (i == 1);
582 field_size = idx_size (MONO_TABLE_METHOD); break;
583 case MONO_TABLE_METHOD_POINTER:
584 g_assert (i == 0);
585 field_size = idx_size (MONO_TABLE_METHOD); break;
586 case MONO_TABLE_NESTEDCLASS:
587 g_assert (i == 0 || i == 1);
588 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
589 case MONO_TABLE_PARAM_POINTER:
590 g_assert (i == 0);
591 field_size = idx_size (MONO_TABLE_PARAM); break;
592 case MONO_TABLE_PROPERTYMAP:
593 g_assert (i == 0 || i == 1);
594 field_size = i ? idx_size (MONO_TABLE_PROPERTY):
595 idx_size(MONO_TABLE_TYPEDEF);
596 break;
597 case MONO_TABLE_PROPERTY_POINTER:
598 g_assert (i == 0);
599 field_size = idx_size (MONO_TABLE_PROPERTY); break;
600 case MONO_TABLE_TYPEDEF:
601 g_assert (i == 4 || i == 5);
602 field_size = i == 4 ? idx_size (MONO_TABLE_FIELD):
603 idx_size(MONO_TABLE_METHOD);
604 break;
605 case MONO_TABLE_GENERICPARAM:
606 g_assert (i == 2);
607 n = MAX (meta->tables [MONO_TABLE_METHOD].rows, meta->tables [MONO_TABLE_TYPEDEF].rows);
608 /*This is a coded token for 2 tables, so takes 1 bit */
609 field_size = rtsize (n, 16 - MONO_TYPEORMETHOD_BITS);
610 break;
611 case MONO_TABLE_GENERICPARAMCONSTRAINT:
612 g_assert (i == 0);
613 field_size = idx_size (MONO_TABLE_GENERICPARAM);
614 break;
615
616 default:
617 g_error ("Can't handle MONO_MT_TABLE_IDX for table %d element %d", tableindex, i);
618 }
619 break;
620
621 /*
622 * HasConstant: ParamDef, FieldDef, Property
623 */
624 case MONO_MT_CONST_IDX:
625 n = MAX (meta->tables [MONO_TABLE_PARAM].rows,
626 meta->tables [MONO_TABLE_FIELD].rows);
627 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
628
629 /* 2 bits to encode tag */
630 field_size = rtsize (n, 16-2);
631 break;
632
633 /*
634 * HasCustomAttribute: points to any table but
635 * itself.
636 */
637 case MONO_MT_HASCAT_IDX:
638 /*
639 * We believe that since the signature and
640 * permission are indexing the Blob heap,
641 * we should consider the blob size first
642 */
643 /* I'm not a believer - lupus
644 if (meta->idx_blob_wide){
645 field_size = 4;
646 break;
647 }*/
648
649 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
650 meta->tables [MONO_TABLE_FIELD].rows);
651 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
652 n = MAX (n, meta->tables [MONO_TABLE_TYPEDEF].rows);
653 n = MAX (n, meta->tables [MONO_TABLE_PARAM].rows);
654 n = MAX (n, meta->tables [MONO_TABLE_INTERFACEIMPL].rows);
655 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
656 n = MAX (n, meta->tables [MONO_TABLE_MODULE].rows);
657 n = MAX (n, meta->tables [MONO_TABLE_DECLSECURITY].rows);
658 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
659 n = MAX (n, meta->tables [MONO_TABLE_EVENT].rows);
660 n = MAX (n, meta->tables [MONO_TABLE_STANDALONESIG].rows);
661 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
662 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
663 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
664 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
665 n = MAX (n, meta->tables [MONO_TABLE_FILE].rows);
666 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
667 n = MAX (n, meta->tables [MONO_TABLE_MANIFESTRESOURCE].rows);
668
669 /* 5 bits to encode */
670 field_size = rtsize (n, 16-5);
671 break;
672
673 /*
674 * CustomAttributeType: TypeDef, TypeRef, MethodDef,
675 * MemberRef and String.
676 */
677 case MONO_MT_CAT_IDX:
678 /* String is a heap, if it is wide, we know the size */
679 /* See above, nope.
680 if (meta->idx_string_wide){
681 field_size = 4;
682 break;
683 }*/
684
685 n = MAX (meta->tables [MONO_TABLE_TYPEREF].rows,
686 meta->tables [MONO_TABLE_TYPEDEF].rows);
687 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
688 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
689
690 /* 3 bits to encode */
691 field_size = rtsize (n, 16-3);
692 break;
693
694 /*
695 * HasDeclSecurity: Typedef, MethodDef, Assembly
696 */
697 case MONO_MT_HASDEC_IDX:
698 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
699 meta->tables [MONO_TABLE_METHOD].rows);
700 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
701
702 /* 2 bits to encode */
703 field_size = rtsize (n, 16-2);
704 break;
705
706 /*
707 * Implementation: File, AssemblyRef, ExportedType
708 */
709 case MONO_MT_IMPL_IDX:
710 n = MAX (meta->tables [MONO_TABLE_FILE].rows,
711 meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
712 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
713
714 /* 2 bits to encode tag */
715 field_size = rtsize (n, 16-2);
716 break;
717
718 /*
719 * HasFieldMarshall: FieldDef, ParamDef
720 */
721 case MONO_MT_HFM_IDX:
722 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
723 meta->tables [MONO_TABLE_PARAM].rows);
724
725 /* 1 bit used to encode tag */
726 field_size = rtsize (n, 16-1);
727 break;
728
729 /*
730 * MemberForwarded: FieldDef, MethodDef
731 */
732 case MONO_MT_MF_IDX:
733 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
734 meta->tables [MONO_TABLE_METHOD].rows);
735
736 /* 1 bit used to encode tag */
737 field_size = rtsize (n, 16-1);
738 break;
739
740 /*
741 * TypeDefOrRef: TypeDef, ParamDef, TypeSpec
742 * LAMESPEC
743 * It is TypeDef, _TypeRef_, TypeSpec, instead.
744 */
745 case MONO_MT_TDOR_IDX:
746 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
747 meta->tables [MONO_TABLE_TYPEREF].rows);
748 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
749
750 /* 2 bits to encode */
751 field_size = rtsize (n, 16-2);
752 break;
753
754 /*
755 * MemberRefParent: TypeDef, TypeRef, MethodDef, ModuleRef, TypeSpec, MemberRef
756 */
757 case MONO_MT_MRP_IDX:
758 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
759 meta->tables [MONO_TABLE_TYPEREF].rows);
760 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
761 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
762 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
763 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
764
765 /* 3 bits to encode */
766 field_size = rtsize (n, 16 - 3);
767 break;
768
769 /*
770 * MethodDefOrRef: MethodDef, MemberRef
771 */
772 case MONO_MT_MDOR_IDX:
773 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
774 meta->tables [MONO_TABLE_MEMBERREF].rows);
775
776 /* 1 bit used to encode tag */
777 field_size = rtsize (n, 16-1);
778 break;
779
780 /*
781 * HasSemantics: Property, Event
782 */
783 case MONO_MT_HS_IDX:
784 n = MAX (meta->tables [MONO_TABLE_PROPERTY].rows,
785 meta->tables [MONO_TABLE_EVENT].rows);
786
787 /* 1 bit used to encode tag */
788 field_size = rtsize (n, 16-1);
789 break;
790
791 /*
792 * ResolutionScope: Module, ModuleRef, AssemblyRef, TypeRef
793 */
794 case MONO_MT_RS_IDX:
795 n = MAX (meta->tables [MONO_TABLE_MODULE].rows,
796 meta->tables [MONO_TABLE_MODULEREF].rows);
797 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
798 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
799
800 /* 2 bits used to encode tag (ECMA spec claims 3) */
801 field_size = rtsize (n, 16 - 2);
802 break;
803 }
804
805 /*
806 * encode field size as follows (we just need to
807 * distinguish them).
808 *
809 * 4 -> 3
810 * 2 -> 1
811 * 1 -> 0
812 */
813 bitfield |= (field_size-1) << shift;
814 shift += 2;
815 size += field_size;
816 /*g_print ("table %02x field %d size %d\n", tableindex, i, field_size);*/
817 }
818
819 *result_bitfield = (i << 24) | bitfield;
820 return size;
821 }
822
823 /**
824 * mono_metadata_compute_table_bases:
825 * @meta: metadata context to compute table values
826 *
827 * Computes the table bases for the metadata structure.
828 * This is an internal function used by the image loader code.
829 */
830 void
831 mono_metadata_compute_table_bases (MonoImage *meta)
832 {
833 int i;
834 const char *base = meta->tables_base;
835
836 for (i = 0; i < MONO_TABLE_NUM; i++) {
837 MonoTableInfo *table = &meta->tables [i];
838 if (table->rows == 0)
839 continue;
840
841 table->row_size = mono_metadata_compute_size (meta, i, &table->size_bitfield);
842 table->base = base;
843 base += table->rows * table->row_size;
844 }
845 }
846
847 /**
848 * mono_metadata_locate:
849 * @meta: metadata context
850 * @table: table code.
851 * @idx: index of element to retrieve from @table.
852 *
853 * Returns: a pointer to the @idx element in the metadata table
854 * whose code is @table.
855 */
856 const char *
857 mono_metadata_locate (MonoImage *meta, int table, int idx)
858 {
859 /* idx == 0 refers always to NULL */
860 g_return_val_if_fail (idx > 0 && idx <= meta->tables [table].rows, ""); /*FIXME shouldn't we return NULL here?*/
861
862 return meta->tables [table].base + (meta->tables [table].row_size * (idx - 1));
863 }
864
865 /**
866 * mono_metadata_locate_token:
867 * @meta: metadata context
868 * @token: metadata token
869 *
870 * Returns: a pointer to the data in the metadata represented by the
871 * token #token.
872 */
873 const char *
874 mono_metadata_locate_token (MonoImage *meta, guint32 token)
875 {
876 return mono_metadata_locate (meta, token >> 24, token & 0xffffff);
877 }
878
879 /**
880 * mono_metadata_string_heap:
881 * @meta: metadata context
882 * @index: index into the string heap.
883 *
884 * Returns: an in-memory pointer to the @index in the string heap.
885 */
886 const char *
887 mono_metadata_string_heap (MonoImage *meta, guint32 index)
888 {
889 g_return_val_if_fail (index < meta->heap_strings.size, "");
890 return meta->heap_strings.data + index;
891 }
892
893 /**
894 * mono_metadata_user_string:
895 * @meta: metadata context
896 * @index: index into the user string heap.
897 *
898 * Returns: an in-memory pointer to the @index in the user string heap ("#US").
899 */
900 const char *
901 mono_metadata_user_string (MonoImage *meta, guint32 index)
902 {
903 g_return_val_if_fail (index < meta->heap_us.size, "");
904 return meta->heap_us.data + index;
905 }
906
907 /**
908 * mono_metadata_blob_heap:
909 * @meta: metadata context
910 * @index: index into the blob.
911 *
912 * Returns: an in-memory pointer to the @index in the Blob heap.
913 */
914 const char *
915 mono_metadata_blob_heap (MonoImage *meta, guint32 index)
916 {
917 g_return_val_if_fail (index < meta->heap_blob.size, "");/*FIXME shouldn't we return NULL and check for index == 0?*/
918 return meta->heap_blob.data + index;
919 }
920
921 /**
922 * mono_metadata_guid_heap:
923 * @meta: metadata context
924 * @index: index into the guid heap.
925 *
926 * Returns: an in-memory pointer to the @index in the guid heap.
927 */
928 const char *
929 mono_metadata_guid_heap (MonoImage *meta, guint32 index)
930 {
931 --index;
932 index *= 16; /* adjust for guid size and 1-based index */
933 g_return_val_if_fail (index < meta->heap_guid.size, "");
934 return meta->heap_guid.data + index;
935 }
936
937 static const unsigned char *
938 dword_align (const unsigned char *ptr)
939 {
940 #if SIZEOF_VOID_P == 8
941 return (const unsigned char *) (((guint64) (ptr + 3)) & ~3);
942 #else
943 return (const unsigned char *) (((guint32) (ptr + 3)) & ~3);
944 #endif
945 }
946
947 /**
948 * mono_metadata_decode_row:
949 * @t: table to extract information from.
950 * @idx: index in table.
951 * @res: array of @res_size cols to store the results in
952 *
953 * This decompresses the metadata element @idx in table @t
954 * into the guint32 @res array that has res_size elements
955 */
956 void
957 mono_metadata_decode_row (const MonoTableInfo *t, int idx, guint32 *res, int res_size)
958 {
959 guint32 bitfield = t->size_bitfield;
960 int i, count = mono_metadata_table_count (bitfield);
961 const char *data;
962
963 g_assert (idx < t->rows);
964 data = t->base + idx * t->row_size;
965
966 g_assert (res_size == count);
967
968 for (i = 0; i < count; i++) {
969 int n = mono_metadata_table_size (bitfield, i);
970
971 switch (n){
972 case 1:
973 res [i] = *data; break;
974 case 2:
975 res [i] = read16 (data); break;
976 case 4:
977 res [i] = read32 (data); break;
978 default:
979 g_assert_not_reached ();
980 }
981 data += n;
982 }
983 }
984
985 /**
986 * mono_metadata_decode_row_col:
987 * @t: table to extract information from.
988 * @idx: index for row in table.
989 * @col: column in the row.
990 *
991 * This function returns the value of column @col from the @idx
992 * row in the table @t.
993 */
994 guint32
995 mono_metadata_decode_row_col (const MonoTableInfo *t, int idx, guint col)
996 {
997 guint32 bitfield = t->size_bitfield;
998 int i;
999 register const char *data;
1000 register int n;
1001
1002 g_assert (idx < t->rows);
1003 g_assert (col < mono_metadata_table_count (bitfield));
1004 data = t->base + idx * t->row_size;
1005
1006 n = mono_metadata_table_size (bitfield, 0);
1007 for (i = 0; i < col; ++i) {
1008 data += n;
1009 n = mono_metadata_table_size (bitfield, i + 1);
1010 }
1011 switch (n) {
1012 case 1:
1013 return *data;
1014 case 2:
1015 return read16 (data);
1016 case 4:
1017 return read32 (data);
1018 default:
1019 g_assert_not_reached ();
1020 }
1021 return 0;
1022 }
1023
1024 /**
1025 * mono_metadata_decode_blob_size:
1026 * @ptr: pointer to a blob object
1027 * @rptr: the new position of the pointer
1028 *
1029 * This decodes a compressed size as described by 23.1.4 (a blob or user string object)
1030 *
1031 * Returns: the size of the blob object
1032 */
1033 guint32
1034 mono_metadata_decode_blob_size (const char *xptr, const char **rptr)
1035 {
1036 const unsigned char *ptr = (const unsigned char *)xptr;
1037 guint32 size;
1038
1039 if ((*ptr & 0x80) == 0){
1040 size = ptr [0] & 0x7f;
1041 ptr++;
1042 } else if ((*ptr & 0x40) == 0){
1043 size = ((ptr [0] & 0x3f) << 8) + ptr [1];
1044 ptr += 2;
1045 } else {
1046 size = ((ptr [0] & 0x1f) << 24) +
1047 (ptr [1] << 16) +
1048 (ptr [2] << 8) +
1049 ptr [3];
1050 ptr += 4;
1051 }
1052 if (rptr)
1053 *rptr = (char*)ptr;
1054 return size;
1055 }
1056
1057 /**
1058 * mono_metadata_decode_value:
1059 * @ptr: pointer to decode from
1060 * @rptr: the new position of the pointer
1061 *
1062 * This routine decompresses 32-bit values as specified in the "Blob and
1063 * Signature" section (22.2)
1064 *
1065 * Returns: the decoded value
1066 */
1067 guint32
1068 mono_metadata_decode_value (const char *_ptr, const char **rptr)
1069 {
1070 const unsigned char *ptr = (const unsigned char *) _ptr;
1071 unsigned char b = *ptr;
1072 guint32 len;
1073
1074 if ((b & 0x80) == 0){
1075 len = b;
1076 ++ptr;
1077 } else if ((b & 0x40) == 0){
1078 len = ((b & 0x3f) << 8 | ptr [1]);
1079 ptr += 2;
1080 } else {
1081 len = ((b & 0x1f) << 24) |
1082 (ptr [1] << 16) |
1083 (ptr [2] << 8) |
1084 ptr [3];
1085 ptr += 4;
1086 }
1087 if (rptr)
1088 *rptr = (char*)ptr;
1089
1090 return len;
1091 }
1092
1093 /**
1094 * mono_metadata_decode_signed_value:
1095 * @ptr: pointer to decode from
1096 * @rptr: the new position of the pointer
1097 *
1098 * This routine decompresses 32-bit signed values
1099 * (not specified in the spec)
1100 *
1101 * Returns: the decoded value
1102 */
1103 gint32
1104 mono_metadata_decode_signed_value (const char *ptr, const char **rptr)
1105 {
1106 guint32 uval = mono_metadata_decode_value (ptr, rptr);
1107 gint32 ival = uval >> 1;
1108 if (!(uval & 1))
1109 return ival;
1110 /* ival is a truncated 2's complement negative number. */
1111 if (ival < 0x40)
1112 /* 6 bits = 7 bits for compressed representation (top bit is '0') - 1 sign bit */
1113 return ival - 0x40;
1114 if (ival < 0x2000)
1115 /* 13 bits = 14 bits for compressed representation (top bits are '10') - 1 sign bit */
1116 return ival - 0x2000;
1117 if (ival < 0x10000000)
1118 /* 28 bits = 29 bits for compressed representation (top bits are '110') - 1 sign bit */
1119 return ival - 0x10000000;
1120 g_assert (ival < 0x20000000);
1121 g_warning ("compressed signed value appears to use 29 bits for compressed representation: %x (raw: %8x)", ival, uval);
1122 return ival - 0x20000000;
1123 }
1124
1125 /*
1126 * Translates the given 1-based index into the Method, Field, Event, or Param tables
1127 * using the *Ptr tables in uncompressed metadata, if they are available.
1128 *
1129 * FIXME: The caller is not forced to call this function, which is error-prone, since
1130 * forgetting to call it would only show up as a bug on uncompressed metadata.
1131 */
1132 guint32
1133 mono_metadata_translate_token_index (MonoImage *image, int table, guint32 idx)
1134 {
1135 if (!image->uncompressed_metadata)
1136 return idx;
1137
1138 switch (table) {
1139 case MONO_TABLE_METHOD:
1140 if (image->tables [MONO_TABLE_METHOD_POINTER].rows)
1141 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_METHOD_POINTER], idx - 1, MONO_METHOD_POINTER_METHOD);
1142 else
1143 return idx;
1144 case MONO_TABLE_FIELD:
1145 if (image->tables [MONO_TABLE_FIELD_POINTER].rows)
1146 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_FIELD_POINTER], idx - 1, MONO_FIELD_POINTER_FIELD);
1147 else
1148 return idx;
1149 case MONO_TABLE_EVENT:
1150 if (image->tables [MONO_TABLE_EVENT_POINTER].rows)
1151 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_EVENT_POINTER], idx - 1, MONO_EVENT_POINTER_EVENT);
1152 else
1153 return idx;
1154 case MONO_TABLE_PROPERTY:
1155 if (image->tables [MONO_TABLE_PROPERTY_POINTER].rows)
1156 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PROPERTY_POINTER], idx - 1, MONO_PROPERTY_POINTER_PROPERTY);
1157 else
1158 return idx;
1159 case MONO_TABLE_PARAM:
1160 if (image->tables [MONO_TABLE_PARAM_POINTER].rows)
1161 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PARAM_POINTER], idx - 1, MONO_PARAM_POINTER_PARAM);
1162 else
1163 return idx;
1164 default:
1165 return idx;
1166 }
1167 }
1168
1169 /**
1170 * mono_metadata_decode_table_row:
1171 *
1172 * Same as mono_metadata_decode_row, but takes an IMAGE+TABLE ID pair, and takes
1173 * uncompressed metadata into account, so it should be used to access the
1174 * Method, Field, Param and Event tables when the access is made from metadata, i.e.
1175 * IDX is retrieved from a metadata table, like MONO_TYPEDEF_FIELD_LIST.
1176 */
1177 void
1178 mono_metadata_decode_table_row (MonoImage *image, int table, int idx, guint32 *res, int res_size)
1179 {
1180 if (image->uncompressed_metadata)
1181 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1182
1183 mono_metadata_decode_row (&image->tables [table], idx, res, res_size);
1184 }
1185
1186 /**
1187 * mono_metadata_decode_table_row_col:
1188 *
1189 * Same as mono_metadata_decode_row_col, but takes an IMAGE+TABLE ID pair, and takes
1190 * uncompressed metadata into account, so it should be used to access the
1191 * Method, Field, Param and Event tables.
1192 */
1193 guint32 mono_metadata_decode_table_row_col (MonoImage *image, int table, int idx, guint col)
1194 {
1195 if (image->uncompressed_metadata)
1196 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1197
1198 return mono_metadata_decode_row_col (&image->tables [table], idx, col);
1199 }
1200
1201 /*
1202 * mono_metadata_parse_typedef_or_ref:
1203 * @m: a metadata context.
1204 * @ptr: a pointer to an encoded TypedefOrRef in @m
1205 * @rptr: pointer updated to match the end of the decoded stream
1206 *
1207 * Returns: a token valid in the @m metadata decoded from
1208 * the compressed representation.
1209 */
1210 guint32
1211 mono_metadata_parse_typedef_or_ref (MonoImage *m, const char *ptr, const char **rptr)
1212 {
1213 guint32 token;
1214 token = mono_metadata_decode_value (ptr, &ptr);
1215 if (rptr)
1216 *rptr = ptr;
1217 return mono_metadata_token_from_dor (token);
1218 }
1219
1220 /*
1221 * mono_metadata_parse_custom_mod:
1222 * @m: a metadata context.
1223 * @dest: storage where the info about the custom modifier is stored (may be NULL)
1224 * @ptr: a pointer to (possibly) the start of a custom modifier list
1225 * @rptr: pointer updated to match the end of the decoded stream
1226 *
1227 * Checks if @ptr points to a type custom modifier compressed representation.
1228 *
1229 * Returns: #TRUE if a custom modifier was found, #FALSE if not.
1230 */
1231 int
1232 mono_metadata_parse_custom_mod (MonoImage *m, MonoCustomMod *dest, const char *ptr, const char **rptr)
1233 {
1234 MonoCustomMod local;
1235 if ((*ptr == MONO_TYPE_CMOD_OPT) || (*ptr == MONO_TYPE_CMOD_REQD)) {
1236 if (!dest)
1237 dest = &local;
1238 dest->required = *ptr == MONO_TYPE_CMOD_REQD ? 1 : 0;
1239 dest->token = mono_metadata_parse_typedef_or_ref (m, ptr + 1, rptr);
1240 return TRUE;
1241 }
1242 return FALSE;
1243 }
1244
1245 /*
1246 * mono_metadata_parse_array_full:
1247 * @m: a metadata context.
1248 * @ptr: a pointer to an encoded array description.
1249 * @rptr: pointer updated to match the end of the decoded stream
1250 *
1251 * Decodes the compressed array description found in the metadata @m at @ptr.
1252 *
1253 * Returns: a #MonoArrayType structure describing the array type
1254 * and dimensions. Memory is allocated from the image mempool.
1255 *
1256 * LOCKING: Acquires the loader lock
1257 */
1258 MonoArrayType *
1259 mono_metadata_parse_array_full (MonoImage *m, MonoGenericContainer *container,
1260 const char *ptr, const char **rptr)
1261 {
1262 int i;
1263 MonoArrayType *array;
1264 MonoType *etype;
1265
1266 array = mono_image_alloc0 (m, sizeof (MonoArrayType));
1267 etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
1268 if (!etype)
1269 return NULL;
1270 array->eklass = mono_class_from_mono_type (etype);
1271 array->rank = mono_metadata_decode_value (ptr, &ptr);
1272
1273 array->numsizes = mono_metadata_decode_value (ptr, &ptr);
1274 if (array->numsizes)
1275 array->sizes = mono_image_alloc0 (m, sizeof (int) * array->numsizes);
1276 for (i = 0; i < array->numsizes; ++i)
1277 array->sizes [i] = mono_metadata_decode_value (ptr, &ptr);
1278
1279 array->numlobounds = mono_metadata_decode_value (ptr, &ptr);
1280 if (array->numlobounds)
1281 array->lobounds = mono_image_alloc0 (m, sizeof (int) * array->numlobounds);
1282 for (i = 0; i < array->numlobounds; ++i)
1283 array->lobounds [i] = mono_metadata_decode_signed_value (ptr, &ptr);
1284
1285 if (rptr)
1286 *rptr = ptr;
1287 return array;
1288 }
1289
1290 MonoArrayType *
1291 mono_metadata_parse_array (MonoImage *m, const char *ptr, const char **rptr)
1292 {
1293 return mono_metadata_parse_array_full (m, NULL, ptr, rptr);
1294 }
1295
1296 /*
1297 * mono_metadata_free_array:
1298 * @array: array description
1299 *
1300 * Frees the array description returned from mono_metadata_parse_array().
1301 */
1302 void
1303 mono_metadata_free_array (MonoArrayType *array)
1304 {
1305 g_free (array->sizes);
1306 g_free (array->lobounds);
1307 g_free (array);
1308 }
1309
1310 /*
1311 * need to add common field and param attributes combinations:
1312 * [out] param
1313 * public static
1314 * public static literal
1315 * private
1316 * private static
1317 * private static literal
1318 */
1319 static const MonoType
1320 builtin_types[] = {
1321 /* data, attrs, type, nmods, byref, pinned */
1322 {{NULL}, 0, MONO_TYPE_VOID, 0, 0, 0},
1323 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 0, 0},
1324 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 1, 0},
1325 {{NULL}, 0, MONO_TYPE_CHAR, 0, 0, 0},
1326 {{NULL}, 0, MONO_TYPE_CHAR, 0, 1, 0},
1327 {{NULL}, 0, MONO_TYPE_I1, 0, 0, 0},
1328 {{NULL}, 0, MONO_TYPE_I1, 0, 1, 0},
1329 {{NULL}, 0, MONO_TYPE_U1, 0, 0, 0},
1330 {{NULL}, 0, MONO_TYPE_U1, 0, 1, 0},
1331 {{NULL}, 0, MONO_TYPE_I2, 0, 0, 0},
1332 {{NULL}, 0, MONO_TYPE_I2, 0, 1, 0},
1333 {{NULL}, 0, MONO_TYPE_U2, 0, 0, 0},
1334 {{NULL}, 0, MONO_TYPE_U2, 0, 1, 0},
1335 {{NULL}, 0, MONO_TYPE_I4, 0, 0, 0},
1336 {{NULL}, 0, MONO_TYPE_I4, 0, 1, 0},
1337 {{NULL}, 0, MONO_TYPE_U4, 0, 0, 0},
1338 {{NULL}, 0, MONO_TYPE_U4, 0, 1, 0},
1339 {{NULL}, 0, MONO_TYPE_I8, 0, 0, 0},
1340 {{NULL}, 0, MONO_TYPE_I8, 0, 1, 0},
1341 {{NULL}, 0, MONO_TYPE_U8, 0, 0, 0},
1342 {{NULL}, 0, MONO_TYPE_U8, 0, 1, 0},
1343 {{NULL}, 0, MONO_TYPE_R4, 0, 0, 0},
1344 {{NULL}, 0, MONO_TYPE_R4, 0, 1, 0},
1345 {{NULL}, 0, MONO_TYPE_R8, 0, 0, 0},
1346 {{NULL}, 0, MONO_TYPE_R8, 0, 1, 0},
1347 {{NULL}, 0, MONO_TYPE_STRING, 0, 0, 0},
1348 {{NULL}, 0, MONO_TYPE_STRING, 0, 1, 0},
1349 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 0, 0},
1350 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 1, 0},
1351 {{NULL}, 0, MONO_TYPE_TYPEDBYREF, 0, 0, 0},
1352 {{NULL}, 0, MONO_TYPE_I, 0, 0, 0},
1353 {{NULL}, 0, MONO_TYPE_I, 0, 1, 0},
1354 {{NULL}, 0, MONO_TYPE_U, 0, 0, 0},
1355 {{NULL}, 0, MONO_TYPE_U, 0, 1, 0},
1356 };
1357
1358 #define NBUILTIN_TYPES() (sizeof (builtin_types) / sizeof (builtin_types [0]))
1359
1360 static GHashTable *type_cache = NULL;
1361 static GHashTable *generic_inst_cache = NULL;
1362 static GHashTable *generic_class_cache = NULL;
1363 static int next_generic_inst_id = 0;
1364
1365 /*
1366 * Protected by the loader lock.
1367 * It has a MonoMethodInflated* as key and value.
1368 * The key lookup will just access the declaring and context fields
1369 */
1370 static GHashTable *generic_method_cache = NULL;
1371
1372 /*
1373 * Protected by the loader lock.
1374 * It has a MonoInflatedMethodSignature* as key and value.
1375 */
1376 static GHashTable *generic_signature_cache = NULL;
1377
1378 static guint mono_generic_class_hash (gconstpointer data);
1379
1380 /*
1381 * MonoTypes with modifies are never cached, so we never check or use that field.
1382 */
1383 static guint
1384 mono_type_hash (gconstpointer data)
1385 {
1386 const MonoType *type = (const MonoType *) data;
1387 if (type->type == MONO_TYPE_GENERICINST)
1388 return mono_generic_class_hash (type->data.generic_class);
1389 else
1390 return type->type | (type->byref << 8) | (type->attrs << 9);
1391 }
1392
1393 static gint
1394 mono_type_equal (gconstpointer ka, gconstpointer kb)
1395 {
1396 const MonoType *a = (const MonoType *) ka;
1397 const MonoType *b = (const MonoType *) kb;
1398
1399 if (a->type != b->type || a->byref != b->byref || a->attrs != b->attrs || a->pinned != b->pinned)
1400 return 0;
1401 /* need other checks */
1402 return 1;
1403 }
1404
1405 guint
1406 mono_metadata_generic_inst_hash (gconstpointer data)
1407 {
1408 const MonoGenericInst *ginst = (const MonoGenericInst *) data;
1409 guint hash = 0;
1410 int i;
1411
1412 for (i = 0; i < ginst->type_argc; ++i) {
1413 hash *= 13;
1414 hash += mono_metadata_type_hash (ginst->type_argv [i]);
1415 }
1416
1417 return hash ^ (ginst->is_open << 8);
1418 }
1419
1420 static gboolean
1421 mono_generic_inst_equal_full (const MonoGenericInst *a, const MonoGenericInst *b, gboolean signature_only)
1422 {
1423 int i;
1424
1425 if (a->id && b->id) {
1426 if (a->id == b->id)
1427 return TRUE;
1428 if (!signature_only)
1429 return FALSE;
1430 }
1431
1432 if (a->is_open != b->is_open || a->type_argc != b->type_argc)
1433 return FALSE;
1434 for (i = 0; i < a->type_argc; ++i) {
1435 if (!do_mono_metadata_type_equal (a->type_argv [i], b->type_argv [i], signature_only))
1436 return FALSE;
1437 }
1438 return TRUE;
1439 }
1440
1441 gboolean
1442 mono_metadata_generic_inst_equal (gconstpointer ka, gconstpointer kb)
1443 {
1444 const MonoGenericInst *a = (const MonoGenericInst *) ka;
1445 const MonoGenericInst *b = (const MonoGenericInst *) kb;
1446
1447 return mono_generic_inst_equal_full (a, b, FALSE);
1448 }
1449
1450 static guint
1451 mono_generic_class_hash (gconstpointer data)
1452 {
1453 const MonoGenericClass *gclass = (const MonoGenericClass *) data;
1454 guint hash = mono_metadata_type_hash (&gclass->container_class->byval_arg);
1455
1456 hash *= 13;
1457 hash += gclass->is_tb_open;
1458 hash += mono_metadata_generic_context_hash (&gclass->context);
1459
1460 return hash;
1461 }
1462
1463 static gboolean
1464 mono_generic_class_equal (gconstpointer ka, gconstpointer kb)
1465 {
1466 const MonoGenericClass *a = (const MonoGenericClass *) ka;
1467 const MonoGenericClass *b = (const MonoGenericClass *) kb;
1468
1469 return _mono_metadata_generic_class_equal (a, b, FALSE);
1470 }
1471
1472 /**
1473 * mono_metadata_init:
1474 *
1475 * Initialize the global variables of this module.
1476 * This is a Mono runtime internal function.
1477 */
1478 void
1479 mono_metadata_init (void)
1480 {
1481 int i;
1482
1483 type_cache = g_hash_table_new (mono_type_hash, mono_type_equal);
1484 generic_inst_cache = g_hash_table_new_full (mono_metadata_generic_inst_hash, mono_metadata_generic_inst_equal, NULL, (GDestroyNotify)free_generic_inst);
1485 generic_class_cache = g_hash_table_new_full (mono_generic_class_hash, mono_generic_class_equal, NULL, (GDestroyNotify)free_generic_class);
1486
1487 for (i = 0; i < NBUILTIN_TYPES (); ++i)
1488 g_hash_table_insert (type_cache, (gpointer) &builtin_types [i], (gpointer) &builtin_types [i]);
1489 }
1490
1491 /**
1492 * mono_metadata_cleanup:
1493 *
1494 * Free all resources used by this module.
1495 * This is a Mono runtime internal function.
1496 */
1497 void
1498 mono_metadata_cleanup (void)
1499 {
1500 /* Has to free this first, as it could reference data in the other caches */
1501 if (generic_method_cache)
1502 g_hash_table_destroy (generic_method_cache);
1503 g_hash_table_destroy (type_cache);
1504 g_hash_table_destroy (generic_inst_cache);
1505 g_hash_table_destroy (generic_class_cache);
1506 if (generic_signature_cache)
1507 g_hash_table_destroy (generic_signature_cache);
1508 type_cache = NULL;
1509 generic_inst_cache = NULL;
1510 generic_class_cache = NULL;
1511 generic_method_cache = NULL;
1512 generic_signature_cache = NULL;
1513 }
1514
1515 /**
1516 * mono_metadata_parse_type:
1517 * @m: metadata context
1518 * @mode: king of type that may be found at @ptr
1519 * @opt_attrs: optional attributes to store in the returned type
1520 * @ptr: pointer to the type representation
1521 * @rptr: pointer updated to match the end of the decoded stream
1522 *
1523 * Decode a compressed type description found at @ptr in @m.
1524 * @mode can be one of MONO_PARSE_MOD_TYPE, MONO_PARSE_PARAM, MONO_PARSE_RET,
1525 * MONO_PARSE_FIELD, MONO_PARSE_LOCAL, MONO_PARSE_TYPE.
1526 * This function can be used to decode type descriptions in method signatures,
1527 * field signatures, locals signatures etc.
1528 *
1529 * To parse a generic type, `generic_container' points to the current class'es
1530 * (the `generic_container' field in the MonoClass) or the current generic method's
1531 * (the `generic_container' field in the MonoMethodNormal) generic container.
1532 * When we encounter any MONO_TYPE_VAR or MONO_TYPE_MVAR's, they're looked up in
1533 * this MonoGenericContainer.
1534 * This is a Mono runtime internal function.
1535 *
1536 * LOCKING: Acquires the loader lock.
1537 *
1538 * Returns: a #MonoType structure representing the decoded type.
1539 */
1540 MonoType*
1541 mono_metadata_parse_type_full (MonoImage *m, MonoGenericContainer *container, MonoParseTypeMode mode,
1542 short opt_attrs, const char *ptr, const char **rptr)
1543 {
1544 MonoType *type, *cached;
1545 MonoType stype;
1546 gboolean byref = FALSE;
1547 gboolean pinned = FALSE;
1548 const char *tmp_ptr;
1549 int count = 0;
1550 gboolean found;
1551
1552 /*
1553 * According to the spec, custom modifiers should come before the byref
1554 * flag, but the IL produced by ilasm from the following signature:
1555 * object modopt(...) &
1556 * starts with a byref flag, followed by the modifiers. (bug #49802)
1557 * Also, this type seems to be different from 'object & modopt(...)'. Maybe
1558 * it would be better to treat byref as real type constructor instead of
1559 * a modifier...
1560 * Also, pinned should come before anything else, but some MSV++ produced
1561 * assemblies violate this (#bug 61990).
1562 */
1563
1564 /* Count the modifiers first */
1565 tmp_ptr = ptr;
1566 found = TRUE;
1567 while (found) {
1568 switch (*tmp_ptr) {
1569 case MONO_TYPE_PINNED:
1570 case MONO_TYPE_BYREF:
1571 ++tmp_ptr;
1572 break;
1573 case MONO_TYPE_CMOD_REQD:
1574 case MONO_TYPE_CMOD_OPT:
1575 count ++;
1576 mono_metadata_parse_custom_mod (m, NULL, tmp_ptr, &tmp_ptr);
1577 break;
1578 default:
1579 found = FALSE;
1580 }
1581 }
1582
1583 if (count) {
1584 type = mono_image_alloc0 (m, MONO_SIZEOF_TYPE + ((gint32)count) * sizeof (MonoCustomMod));
1585 type->num_mods = count;
1586 if (count > 64)
1587 g_warning ("got more than 64 modifiers in type");
1588 } else {
1589 type = &stype;
1590 memset (type, 0, MONO_SIZEOF_TYPE);
1591 }
1592
1593 /* Parse pinned, byref and custom modifiers */
1594 found = TRUE;
1595 count = 0;
1596 while (found) {
1597 switch (*ptr) {
1598 case MONO_TYPE_PINNED:
1599 pinned = TRUE;
1600 ++ptr;
1601 break;
1602 case MONO_TYPE_BYREF:
1603 byref = TRUE;
1604 ++ptr;
1605 break;
1606 case MONO_TYPE_CMOD_REQD:
1607 case MONO_TYPE_CMOD_OPT:
1608 mono_metadata_parse_custom_mod (m, &(type->modifiers [count]), ptr, &ptr);
1609 count ++;
1610 break;
1611 default:
1612 found = FALSE;
1613 }
1614 }
1615
1616 type->attrs = opt_attrs;
1617 type->byref = byref;
1618 type->pinned = pinned ? 1 : 0;
1619
1620 if (!do_mono_metadata_parse_type (type, m, container, ptr, &ptr)) {
1621 return NULL;
1622 }
1623
1624 if (rptr)
1625 *rptr = ptr;
1626
1627 if (!type->num_mods) {
1628 /* no need to free type here, because it is on the stack */
1629 if ((type->type == MONO_TYPE_CLASS || type->type == MONO_TYPE_VALUETYPE) && !type->pinned && !type->attrs) {
1630 MonoType *ret = type->byref ? &type->data.klass->this_arg : &type->data.klass->byval_arg;
1631
1632 /* Consider the case:
1633
1634 class Foo<T> { class Bar {} }
1635 class Test : Foo<Test>.Bar {}
1636
1637 When Foo<Test> is being expanded, 'Test' isn't yet initialized. It's actually in
1638 a really pristine state: it doesn't even know whether 'Test' is a reference or a value type.
1639
1640 We ensure that the MonoClass is in a state that we can canonicalize to:
1641
1642 klass->byval_arg.data.klass == klass
1643 klass->this_arg.data.klass == klass
1644
1645 If we can't canonicalize 'type', it doesn't matter, since later users of 'type' will do it.
1646
1647 LOCKING: even though we don't explicitly hold a lock, in the problematic case 'ret' is a field
1648 of a MonoClass which currently holds the loader lock. 'type' is local.
1649 */
1650 if (ret->data.klass == type->data.klass) {
1651 return ret;
1652 }
1653 }
1654 /* No need to use locking since nobody is modifying the hash table */
1655 if ((cached = g_hash_table_lookup (type_cache, type))) {
1656 return cached;
1657 }
1658 }
1659
1660 /* printf ("%x %x %c %s\n", type->attrs, type->num_mods, type->pinned ? 'p' : ' ', mono_type_full_name (type)); */
1661
1662 if (type == &stype) {
1663 type = mono_image_alloc (m, MONO_SIZEOF_TYPE);
1664 memcpy (type, &stype, MONO_SIZEOF_TYPE);
1665 }
1666 return type;
1667 }
1668
1669 /*
1670 * LOCKING: Acquires the loader lock.
1671 */
1672 MonoType*
1673 mono_metadata_parse_type (MonoImage *m, MonoParseTypeMode mode, short opt_attrs,
1674 const char *ptr, const char **rptr)
1675 {
1676 return mono_metadata_parse_type_full (m, NULL, mode, opt_attrs, ptr, rptr);
1677 }
1678
1679 gboolean
1680 mono_metadata_method_has_param_attrs (MonoImage *m, int def)
1681 {
1682 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1683 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1684 guint lastp, i, param_index = mono_metadata_decode_row_col (methodt, def - 1, MONO_METHOD_PARAMLIST);
1685
1686 if (def < methodt->rows)
1687 lastp = mono_metadata_decode_row_col (methodt, def, MONO_METHOD_PARAMLIST);
1688 else
1689 lastp = m->tables [MONO_TABLE_PARAM].rows + 1;
1690
1691 for (i = param_index; i < lastp; ++i) {
1692 guint32 flags = mono_metadata_decode_row_col (paramt, i - 1, MONO_PARAM_FLAGS);
1693 if (flags)
1694 return TRUE;
1695 }
1696
1697 return FALSE;
1698 }
1699
1700 /*
1701 * mono_metadata_get_param_attrs:
1702 *
1703 * @m The image to loader parameter attributes from
1704 * @def method def token (one based)
1705 * @param_count number of params to decode including the return value
1706 *
1707 * Return the parameter attributes for the method whose MethodDef index is DEF. The
1708 * returned memory needs to be freed by the caller. If all the param attributes are
1709 * 0, then NULL is returned.
1710 */
1711 int*
1712 mono_metadata_get_param_attrs (MonoImage *m, int def, int param_count)
1713 {
1714 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1715 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1716 guint32 cols [MONO_PARAM_SIZE];
1717 guint lastp, i, param_index = mono_metadata_decode_row_col (methodt, def - 1, MONO_METHOD_PARAMLIST);
1718 int *pattrs = NULL;
1719
1720 if (def < methodt->rows)
1721 lastp = mono_metadata_decode_row_col (methodt, def, MONO_METHOD_PARAMLIST);
1722 else
1723 lastp = paramt->rows + 1;
1724
1725 for (i = param_index; i < lastp; ++i) {
1726 mono_metadata_decode_row (paramt, i - 1, cols, MONO_PARAM_SIZE);
1727 if (cols [MONO_PARAM_FLAGS]) {
1728 if (!pattrs)
1729 pattrs = g_new0 (int, param_count);
1730 /* at runtime we just ignore this kind of malformed file:
1731 * the verifier can signal the error to the user
1732 */
1733 if (cols [MONO_PARAM_SEQUENCE] >= param_count)
1734 continue;
1735 pattrs [cols [MONO_PARAM_SEQUENCE]] = cols [MONO_PARAM_FLAGS];
1736 }
1737 }
1738
1739 return pattrs;
1740 }
1741
1742 /*
1743 * mono_metadata_parse_signature_full:
1744 * @image: metadata context
1745 * @generic_container: generic container
1746 * @toke: metadata token
1747 *
1748 * Decode a method signature stored in the STANDALONESIG table
1749 *
1750 * LOCKING: Assumes the loader lock is held.
1751 *
1752 * Returns: a MonoMethodSignature describing the signature.
1753 */
1754 MonoMethodSignature*
1755 mono_metadata_parse_signature_full (MonoImage *image, MonoGenericContainer *generic_container, guint32 token)
1756 {
1757 MonoTableInfo *tables = image->tables;
1758 guint32 idx = mono_metadata_token_index (token);
1759 guint32 sig;
1760 const char *ptr;
1761
1762 if (image->dynamic)
1763 return mono_lookup_dynamic_token (image, token, NULL);
1764
1765 g_assert (mono_metadata_token_table(token) == MONO_TABLE_STANDALONESIG);
1766
1767 sig = mono_metadata_decode_row_col (&tables [MONO_TABLE_STANDALONESIG], idx - 1, 0);
1768
1769 ptr = mono_metadata_blob_heap (image, sig);
1770 mono_metadata_decode_blob_size (ptr, &ptr);
1771
1772 return mono_metadata_parse_method_signature_full (image, generic_container, 0, ptr, NULL);
1773 }
1774
1775 /*
1776 * mono_metadata_parse_signature:
1777 * @image: metadata context
1778 * @toke: metadata token
1779 *
1780 * Decode a method signature stored in the STANDALONESIG table
1781 *
1782 * Returns: a MonoMethodSignature describing the signature.
1783 */
1784 MonoMethodSignature*
1785 mono_metadata_parse_signature (MonoImage *image, guint32 token)
1786 {
1787 return mono_metadata_parse_signature_full (image, NULL, token);
1788 }
1789
1790 /*
1791 * mono_metadata_signature_alloc:
1792 * @image: metadata context
1793 * @nparmas: number of parameters in the signature
1794 *
1795 * Allocate a MonoMethodSignature structure with the specified number of params.
1796 * The return type and the params types need to be filled later.
1797 * This is a Mono runtime internal function.
1798 *
1799 * LOCKING: Assumes the loader lock is held.
1800 *
1801 * Returns: the new MonoMethodSignature structure.
1802 */
1803 MonoMethodSignature*
1804 mono_metadata_signature_alloc (MonoImage *m, guint32 nparams)
1805 {
1806 MonoMethodSignature *sig;
1807
1808 sig = mono_image_alloc0 (m, MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)nparams) * sizeof (MonoType*));
1809 sig->param_count = nparams;
1810 sig->sentinelpos = -1;
1811
1812 return sig;
1813 }
1814
1815 static MonoMethodSignature*
1816 mono_metadata_signature_dup_internal (MonoImage *image, MonoMemPool *mp, MonoMethodSignature *sig)
1817 {
1818 int sigsize;
1819 MonoMethodSignature *ret;
1820 sigsize = MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *);
1821
1822 if (image) {
1823 ret = mono_image_alloc (image, sigsize);
1824 } else if (mp) {
1825 ret = mono_mempool_alloc (mp, sigsize);
1826 } else {
1827 ret = g_malloc (sigsize);
1828 }
1829 memcpy (ret, sig, sigsize);
1830 return ret;
1831 }
1832
1833 MonoMethodSignature*
1834 mono_metadata_signature_dup_full (MonoImage *image, MonoMethodSignature *sig)
1835 {
1836 return mono_metadata_signature_dup_internal (image, NULL, sig);
1837 }
1838
1839 /*The mempool is accessed without synchronization*/
1840 MonoMethodSignature*
1841 mono_metadata_signature_dup_mempool (MonoMemPool *mp, MonoMethodSignature *sig)
1842 {
1843 return mono_metadata_signature_dup_internal (NULL, mp, sig);
1844 }
1845
1846 /*
1847 * mono_metadata_signature_dup:
1848 * @sig: method signature
1849 *
1850 * Duplicate an existing MonoMethodSignature so it can be modified.
1851 * This is a Mono runtime internal function.
1852 *
1853 * Returns: the new MonoMethodSignature structure.
1854 */
1855 MonoMethodSignature*
1856 mono_metadata_signature_dup (MonoMethodSignature *sig)
1857 {
1858 return mono_metadata_signature_dup_full (NULL, sig);
1859 }
1860
1861 /*
1862 * mono_metadata_signature_size:
1863 *
1864 * Return the amount of memory allocated to SIG.
1865 */
1866 guint32
1867 mono_metadata_signature_size (MonoMethodSignature *sig)
1868 {
1869 return MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *);
1870 }
1871
1872 /*
1873 * mono_metadata_parse_method_signature:
1874 * @m: metadata context
1875 * @generic_container: generics container
1876 * @def: the MethodDef index or 0 for Ref signatures.
1877 * @ptr: pointer to the signature metadata representation
1878 * @rptr: pointer updated to match the end of the decoded stream
1879 *
1880 * Decode a method signature stored at @ptr.
1881 * This is a Mono runtime internal function.
1882 *
1883 * LOCKING: Assumes the loader lock is held.
1884 *
1885 * Returns: a MonoMethodSignature describing the signature.
1886 */
1887 MonoMethodSignature *
1888 mono_metadata_parse_method_signature_full (MonoImage *m, MonoGenericContainer *container,
1889 int def, const char *ptr, const char **rptr)
1890 {
1891 MonoMethodSignature *method;
1892 int i, *pattrs = NULL;
1893 guint32 hasthis = 0, explicit_this = 0, call_convention, param_count;
1894 guint32 gen_param_count = 0;
1895 gboolean is_open = FALSE;
1896
1897 if (*ptr & 0x10)
1898 gen_param_count = 1;
1899 if (*ptr & 0x20)
1900 hasthis = 1;
1901 if (*ptr & 0x40)
1902 explicit_this = 1;
1903 call_convention = *ptr & 0x0F;
1904 ptr++;
1905 if (gen_param_count)
1906 gen_param_count = mono_metadata_decode_value (ptr, &ptr);
1907 param_count = mono_metadata_decode_value (ptr, &ptr);
1908
1909 if (def)
1910 pattrs = mono_metadata_get_param_attrs (m, def, param_count + 1); /*Must be + 1 since signature's param count doesn't account for the return value */
1911
1912 method = mono_metadata_signature_alloc (m, param_count);
1913 method->hasthis = hasthis;
1914 method->explicit_this = explicit_this;
1915 method->call_convention = call_convention;
1916 method->generic_param_count = gen_param_count;
1917
1918 if (call_convention != 0xa) {
1919 method->ret = mono_metadata_parse_type_full (m, container, MONO_PARSE_RET, pattrs ? pattrs [0] : 0, ptr, &ptr);
1920 if (!method->ret) {
1921 mono_metadata_free_method_signature (method);
1922 g_free (pattrs);
1923 return NULL;
1924 }
1925 is_open = mono_class_is_open_constructed_type (method->ret);
1926 }
1927
1928 for (i = 0; i < method->param_count; ++i) {
1929 if (*ptr == MONO_TYPE_SENTINEL) {
1930 if (method->call_convention != MONO_CALL_VARARG || def) {
1931 g_warning ("found sentinel for methoddef or no vararg method 0x%08x on image %s", def, m->name);
1932 g_free (pattrs);
1933 return NULL;
1934 }
1935 if (method->sentinelpos >= 0) {
1936 g_warning ("found sentinel twice in the same signature for method 0x%08x on image %s", def, m->name);
1937 g_free (pattrs);
1938 return NULL;
1939 }
1940 method->sentinelpos = i;
1941 ptr++;
1942 }
1943 method->params [i] = mono_metadata_parse_type_full (m, container, MONO_PARSE_PARAM, pattrs ? pattrs [i+1] : 0, ptr, &ptr);
1944 if (!method->params [i]) {
1945 mono_metadata_free_method_signature (method);
1946 g_free (pattrs);
1947 return NULL;
1948 }
1949 if (!is_open)
1950 is_open = mono_class_is_open_constructed_type (method->params [i]);
1951 }
1952
1953 /* The sentinel could be missing if the caller does not pass any additional arguments */
1954 if (!def && method->call_convention == MONO_CALL_VARARG && method->sentinelpos < 0)
1955 method->sentinelpos = method->param_count;
1956
1957 method->has_type_parameters = is_open;
1958
1959 if (def && (method->call_convention == MONO_CALL_VARARG))
1960 method->sentinelpos = method->param_count;
1961
1962 g_free (pattrs);
1963
1964 if (rptr)
1965 *rptr = ptr;
1966 /*
1967 * Add signature to a cache and increase ref count...
1968 */
1969
1970 return method;
1971 }
1972
1973 /*
1974 * mono_metadata_parse_method_signature:
1975 * @m: metadata context
1976 * @def: the MethodDef index or 0 for Ref signatures.
1977 * @ptr: pointer to the signature metadata representation
1978 * @rptr: pointer updated to match the end of the decoded stream
1979 *
1980 * Decode a method signature stored at @ptr.
1981 * This is a Mono runtime internal function.
1982 *
1983 * LOCKING: Assumes the loader lock is held.
1984 *
1985 * Returns: a MonoMethodSignature describing the signature.
1986 */
1987 MonoMethodSignature *
1988 mono_metadata_parse_method_signature (MonoImage *m, int def, const char *ptr, const char **rptr)
1989 {
1990 return mono_metadata_parse_method_signature_full (m, NULL, def, ptr, rptr);
1991 }
1992
1993 /*
1994 * mono_metadata_free_method_signature:
1995 * @sig: signature to destroy
1996 *
1997 * Free the memory allocated in the signature @sig.
1998 * This method needs to be robust and work also on partially-built
1999 * signatures, so it does extra checks.
2000 */
2001 void
2002 mono_metadata_free_method_signature (MonoMethodSignature *sig)
2003 {
2004 /* Everything is allocated from mempools */
2005 /*
2006 int i;
2007 if (sig->ret)
2008 mono_metadata_free_type (sig->ret);
2009 for (i = 0; i < sig->param_count; ++i) {
2010 if (sig->params [i])
2011 mono_metadata_free_type (sig->params [i]);
2012 }
2013 */
2014 }
2015
2016 void
2017 mono_metadata_free_inflated_signature (MonoMethodSignature *sig)
2018 {
2019 int i;
2020
2021 /* Allocated in inflate_generic_signature () */
2022 if (sig->ret)
2023 mono_metadata_free_type (sig->ret);
2024 for (i = 0; i < sig->param_count; ++i) {
2025 if (sig->params [i])
2026 mono_metadata_free_type (sig->params [i]);
2027 }
2028 g_free (sig);
2029 }
2030
2031 static gboolean
2032 inflated_method_equal (gconstpointer a, gconstpointer b)
2033 {
2034 const MonoMethodInflated *ma = a;
2035 const MonoMethodInflated *mb = b;
2036 if (ma->declaring != mb->declaring)
2037 return FALSE;
2038 if (ma->method.method.is_mb_open != mb->method.method.is_mb_open)
2039 return FALSE;
2040 return mono_metadata_generic_context_equal (&ma->context, &mb->context);
2041 }
2042
2043 static guint
2044 inflated_method_hash (gconstpointer a)
2045 {
2046 const MonoMethodInflated *ma = a;
2047 return (mono_metadata_generic_context_hash (&ma->context) ^ mono_aligned_addr_hash (ma->declaring)) + ma->method.method.is_mb_open;
2048 }
2049
2050 static gboolean
2051 inflated_signature_equal (gconstpointer a, gconstpointer b)
2052 {
2053 const MonoInflatedMethodSignature *sig1 = a;
2054 const MonoInflatedMethodSignature *sig2 = b;
2055
2056 /* sig->sig is assumed to be canonized */
2057 if (sig1->sig != sig2->sig)
2058 return FALSE;
2059 /* The generic instances are canonized */
2060 return mono_metadata_generic_context_equal (&sig1->context, &sig2->context);
2061 }
2062
2063 static guint
2064 inflated_signature_hash (gconstpointer a)
2065 {
2066 const MonoInflatedMethodSignature *sig = a;
2067
2068 /* sig->sig is assumed to be canonized */
2069 return mono_metadata_generic_context_hash (&sig->context) ^ mono_aligned_addr_hash (sig->sig);
2070 }
2071
2072 /*static void
2073 dump_ginst (MonoGenericInst *ginst)
2074 {
2075 int i;
2076 char *name;
2077
2078 g_print ("Ginst: <");
2079 for (i = 0; i < ginst->type_argc; ++i) {
2080 if (i != 0)
2081 g_print (", ");
2082 name = mono_type_get_name (ginst->type_argv [i]);
2083 g_print ("%s", name);
2084 g_free (name);
2085 }
2086 g_print (">");
2087 }*/
2088
2089 static gboolean type_in_image (MonoType *type, MonoImage *image);
2090
2091 static gboolean
2092 signature_in_image (MonoMethodSignature *sig, MonoImage *image)
2093 {
2094 gpointer iter = NULL;
2095 MonoType *p;
2096
2097 while ((p = mono_signature_get_params (sig, &iter)) != NULL)
2098 if (type_in_image (p, image))
2099 return TRUE;
2100
2101 return type_in_image (mono_signature_get_return_type (sig), image);
2102 }
2103
2104 static gboolean
2105 ginst_in_image (MonoGenericInst *ginst, MonoImage *image)
2106 {
2107 int i;
2108
2109 for (i = 0; i < ginst->type_argc; ++i) {
2110 if (type_in_image (ginst->type_argv [i], image))
2111 return TRUE;
2112 }
2113
2114 return FALSE;
2115 }
2116
2117 static gboolean
2118 gclass_in_image (MonoGenericClass *gclass, MonoImage *image)
2119 {
2120 return gclass->container_class->image == image ||
2121 ginst_in_image (gclass->context.class_inst, image);
2122 }
2123
2124 static gboolean
2125 type_in_image (MonoType *type, MonoImage *image)
2126 {
2127 retry:
2128 switch (type->type) {
2129 case MONO_TYPE_GENERICINST:
2130 return gclass_in_image (type->data.generic_class, image);
2131 case MONO_TYPE_PTR:
2132 type = type->data.type;
2133 goto retry;
2134 case MONO_TYPE_SZARRAY:
2135 type = &type->data.klass->byval_arg;
2136 goto retry;
2137 case MONO_TYPE_ARRAY:
2138 type = &type->data.array->eklass->byval_arg;
2139 goto retry;
2140 case MONO_TYPE_FNPTR:
2141 return signature_in_image (type->data.method, image);
2142 case MONO_TYPE_VAR: {
2143 MonoGenericContainer *container = mono_type_get_generic_param_owner (type);
2144 if (container) {
2145 g_assert (!container->is_method);
2146 /*
2147 * FIXME: The following check is here solely
2148 * for monodis, which uses the internal
2149 * function
2150 * mono_metadata_load_generic_params(). The
2151 * caller of that function needs to fill in
2152 * owner->klass or owner->method of the
2153 * returned struct, but monodis doesn't do
2154 * that. The image unloading depends on that,
2155 * however, so a crash results without this
2156 * check.
2157 */
2158 if (!container->owner.klass)
2159 return container->image == image;
2160 return container->owner.klass->image == image;
2161 } else {
2162 return type->data.generic_param->image == image;
2163 }
2164 }
2165 case MONO_TYPE_MVAR: {
2166 MonoGenericContainer *container = mono_type_get_generic_param_owner (type);
2167 if (type->data.generic_param->image == image)
2168 return TRUE;
2169 if (container) {
2170 g_assert (container->is_method);
2171 if (!container->owner.method)
2172 /* RefEmit created generic param whose method is not finished */
2173 return container->image == image;
2174 return container->owner.method->klass->image == image;
2175 } else {
2176 return type->data.generic_param->image == image;
2177 }
2178 }
2179 default:
2180 /* At this point, we should've avoided all potential allocations in mono_class_from_mono_type () */
2181 return image == mono_class_from_mono_type (type)->image;
2182 }
2183 }
2184
2185 typedef struct {
2186 MonoImage *image;
2187 GSList *list;
2188 } CleanForImageUserData;
2189
2190 static gboolean
2191 steal_gclass_in_image (gpointer key, gpointer value, gpointer data)
2192 {
2193 MonoGenericClass *gclass = key;
2194 CleanForImageUserData *user_data = data;
2195
2196 if (!gclass_in_image (gclass, user_data->image))
2197 return FALSE;
2198
2199 user_data->list = g_slist_prepend (user_data->list, gclass);
2200 return TRUE;
2201 }
2202
2203 static gboolean
2204 steal_ginst_in_image (gpointer key, gpointer value, gpointer data)
2205 {
2206 MonoGenericInst *ginst = key;
2207 CleanForImageUserData *user_data = data;
2208
2209 if (!ginst_in_image (ginst, user_data->image))
2210 return FALSE;
2211
2212 user_data->list = g_slist_prepend (user_data->list, ginst);
2213 return TRUE;
2214 }
2215
2216 static gboolean
2217 inflated_method_in_image (gpointer key, gpointer value, gpointer data)
2218 {
2219 MonoImage *image = data;
2220 MonoMethodInflated *method = key;
2221
2222 // FIXME:
2223 // https://bugzilla.novell.com/show_bug.cgi?id=458168
2224 return method->declaring->klass->image == image ||
2225 (method->context.class_inst && ginst_in_image (method->context.class_inst, image)) ||
2226 (method->context.method_inst && ginst_in_image (method->context.method_inst, image)) || (((MonoMethod*)method)->signature && signature_in_image (mono_method_signature ((MonoMethod*)method), image));
2227 }
2228
2229 static gboolean
2230 inflated_signature_in_image (gpointer key, gpointer value, gpointer data)
2231 {
2232 MonoImage *image = data;
2233 MonoInflatedMethodSignature *sig = key;
2234
2235 return signature_in_image (sig->sig, image) ||
2236 (sig->context.class_inst && ginst_in_image (sig->context.class_inst, image)) ||
2237 (sig->context.method_inst && ginst_in_image (sig->context.method_inst, image));
2238 }
2239
2240 void
2241 mono_metadata_clean_for_image (MonoImage *image)
2242 {
2243 CleanForImageUserData ginst_data, gclass_data;
2244 GSList *l;
2245
2246 /* The data structures could reference each other so we delete them in two phases */
2247 ginst_data.image = gclass_data.image = image;
2248 ginst_data.list = gclass_data.list = NULL;
2249
2250 mono_loader_lock ();
2251 /* Collect the items to delete and remove them from the hash table */
2252 g_hash_table_foreach_steal (generic_inst_cache, steal_ginst_in_image, &ginst_data);
2253 g_hash_table_foreach_steal (generic_class_cache, steal_gclass_in_image, &gclass_data);
2254 if (generic_method_cache)
2255 g_hash_table_foreach_remove (generic_method_cache, inflated_method_in_image, image);
2256 if (generic_signature_cache)
2257 g_hash_table_foreach_remove (generic_signature_cache, inflated_signature_in_image, image);
2258 /* Delete the removed items */
2259 for (l = ginst_data.list; l; l = l->next)
2260 free_generic_inst (l->data);
2261 for (l = gclass_data.list; l; l = l->next)
2262 free_generic_class (l->data);
2263 g_slist_free (ginst_data.list);
2264 g_slist_free (gclass_data.list);
2265 mono_class_unregister_image_generic_subclasses (image);
2266 mono_loader_unlock ();
2267 }
2268
2269 static void
2270 free_inflated_method (MonoMethodInflated *imethod)
2271 {
2272 int i;
2273 MonoMethod *method = (MonoMethod*)imethod;
2274
2275 mono_marshal_free_inflated_wrappers (method);
2276
2277 if (method->signature)
2278 mono_metadata_free_inflated_signature (method->signature);
2279
2280 if (!((method->flags & METHOD_ATTRIBUTE_ABSTRACT) || (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) || (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) || (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))) {
2281 MonoMethodNormal* mn = (MonoMethodNormal*) method;
2282 MonoMethodHeader *header = mn->header;
2283
2284 if (header) {
2285 /* Allocated in inflate_generic_header () */
2286 for (i = 0; i < header->num_locals; ++i)
2287 mono_metadata_free_type (header->locals [i]);
2288 g_free (header->clauses);
2289 g_free (header);
2290 }
2291 }
2292
2293 g_free (method);
2294 }
2295
2296 static void
2297 free_generic_inst (MonoGenericInst *ginst)
2298 {
2299 int i;
2300
2301 for (i = 0; i < ginst->type_argc; ++i)
2302 mono_metadata_free_type (ginst->type_argv [i]);
2303 g_free (ginst);
2304 }
2305
2306
2307 static void
2308 free_generic_class (MonoGenericClass *gclass)
2309 {
2310 int i;
2311
2312 /* FIXME: The dynamic case */
2313 if (gclass->cached_class && !gclass->cached_class->image->dynamic && !mono_generic_class_is_generic_type_definition (gclass)) {
2314 MonoClass *class = gclass->cached_class;
2315
2316 /* Allocated in mono_class_init () */
2317 g_free (class->methods);
2318 if (class->ext)
2319 g_free (class->ext->properties);
2320 /* Allocated in mono_generic_class_get_class () */
2321 g_free (class->interfaces);
2322 g_free (class);
2323 } else if (gclass->is_dynamic) {
2324 MonoDynamicGenericClass *dgclass = (MonoDynamicGenericClass *)gclass;
2325
2326 for (i = 0; i < dgclass->count_fields; ++i) {
2327 MonoClassField *field = dgclass->fields + i;
2328 mono_metadata_free_type (field->type);
2329 g_free ((char*)field->name);
2330 #if HAVE_SGEN_GC
2331 MONO_GC_UNREGISTER_ROOT (dgclass->field_objects [i]);
2332 #endif
2333 }
2334 for (i = 0; i < dgclass->count_properties; ++i) {
2335 MonoProperty *property = dgclass->properties + i;
2336 g_free ((char*)property->name);
2337 }
2338 for (i = 0; i < dgclass->count_events; ++i) {
2339 MonoEvent *event = dgclass->events + i;
2340 g_free ((char*)event->name);
2341 }
2342
2343 g_free (dgclass->methods);
2344 g_free (dgclass->ctors);
2345 g_free (dgclass->fields);
2346 g_free (dgclass->properties);
2347 g_free (dgclass->events);
2348 g_free (dgclass->field_objects);
2349 g_free (dgclass->field_generic_types);
2350 if (!mono_generic_class_is_generic_type_definition (gclass))
2351 g_free (gclass->cached_class);
2352 }
2353 g_free (gclass);
2354 }
2355
2356 static void
2357 free_inflated_signature (MonoInflatedMethodSignature *sig)
2358 {
2359 mono_metadata_free_inflated_signature (sig->sig);
2360 g_free (sig);
2361 }
2362
2363 /*
2364 * LOCKING: assumes the loader lock is held.
2365 */
2366 MonoMethodInflated*
2367 mono_method_inflated_lookup (MonoMethodInflated* method, gboolean cache)
2368 {
2369 if (cache) {
2370 if (!generic_method_cache)
2371 generic_method_cache = g_hash_table_new_full (inflated_method_hash, inflated_method_equal, NULL, (GDestroyNotify)free_inflated_method);
2372 g_hash_table_insert (generic_method_cache, method, method);
2373 return method;
2374 } else {
2375 if (generic_method_cache)
2376 return g_hash_table_lookup (generic_method_cache, method);
2377 return NULL;
2378 }
2379 }
2380
2381 /*
2382 * mono_metadata_get_inflated_signature:
2383 *
2384 * Given an inflated signature and a generic context, return a canonical copy of the
2385 * signature. The returned signature might be equal to SIG or it might be a cached copy.
2386 */
2387 MonoMethodSignature *
2388 mono_metadata_get_inflated_signature (MonoMethodSignature *sig, MonoGenericContext *context)
2389 {
2390 MonoInflatedMethodSignature helper;
2391 MonoInflatedMethodSignature *res;
2392
2393 mono_loader_lock ();
2394 if (!generic_signature_cache)
2395 generic_signature_cache = g_hash_table_new_full (inflated_signature_hash, inflated_signature_equal, NULL, (GDestroyNotify)free_inflated_signature);
2396
2397 helper.sig = sig;
2398 helper.context.class_inst = context->class_inst;
2399 helper.context.method_inst = context->method_inst;
2400 res = g_hash_table_lookup (generic_signature_cache, &helper);
2401 if (!res) {
2402 res = g_new0 (MonoInflatedMethodSignature, 1);
2403 res->sig = sig;
2404 res->context.class_inst = context->class_inst;
2405 res->context.method_inst = context->method_inst;
2406 g_hash_table_insert (generic_signature_cache, res, res);
2407 }
2408
2409 mono_loader_unlock ();
2410 return res->sig;
2411 }
2412
2413 /*
2414 * mono_metadata_get_generic_inst:
2415 *
2416 * Given a list of types, return a MonoGenericInst that represents that list.
2417 * The returned MonoGenericInst has its own copy of the list of types. The list
2418 * passed in the argument can be freed, modified or disposed of.
2419 *
2420 */
2421 MonoGenericInst *
2422 mono_metadata_get_generic_inst (int type_argc, MonoType **type_argv)
2423 {
2424 MonoGenericInst *ginst;
2425 gboolean is_open;
2426 int i;
2427 int size = MONO_SIZEOF_GENERIC_INST + type_argc * sizeof (MonoType *);
2428
2429 for (i = 0; i < type_argc; ++i)
2430 if (mono_class_is_open_constructed_type (type_argv [i]))
2431 break;
2432 is_open = (i < type_argc);
2433
2434 ginst = alloca (size);
2435 ginst->id = 0;
2436 ginst->is_open = is_open;
2437 ginst->type_argc = type_argc;
2438 memcpy (ginst->type_argv, type_argv, type_argc * sizeof (MonoType *));
2439
2440 mono_loader_lock ();
2441
2442 ginst = g_hash_table_lookup (generic_inst_cache, ginst);
2443 if (!ginst) {
2444 ginst = g_malloc (size);
2445 ginst->id = ++next_generic_inst_id;
2446 ginst->is_open = is_open;
2447 ginst->type_argc = type_argc;
2448
2449 for (i = 0; i < type_argc; ++i)
2450 ginst->type_argv [i] = mono_metadata_type_dup (NULL, type_argv [i]);
2451
2452 g_hash_table_insert (generic_inst_cache, ginst, ginst);
2453 }
2454
2455 mono_loader_unlock ();
2456 return ginst;
2457 }
2458
2459 static gboolean
2460 mono_metadata_is_type_builder_generic_type_definition (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2461 {
2462 MonoGenericContainer *container = container_class->generic_container;
2463
2464 if (!is_dynamic || container_class->wastypebuilder || container->type_argc != inst->type_argc)
2465 return FALSE;
2466 return inst == container->context.class_inst;
2467 }
2468
2469 /*
2470 * mono_metadata_lookup_generic_class:
2471 *
2472 * Returns a MonoGenericClass with the given properties.
2473 *
2474 */
2475 MonoGenericClass *
2476 mono_metadata_lookup_generic_class (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2477 {
2478 MonoGenericClass *gclass;
2479 MonoGenericClass helper;
2480 gboolean is_tb_open = mono_metadata_is_type_builder_generic_type_definition (container_class, inst, is_dynamic);
2481
2482 helper.container_class = container_class;
2483 helper.context.class_inst = inst;
2484 helper.context.method_inst = NULL;
2485 helper.is_dynamic = is_dynamic; /* We use this in a hash lookup, which does not attempt to downcast the pointer */
2486 helper.is_tb_open = is_tb_open;
2487 helper.cached_class = NULL;
2488
2489 mono_loader_lock ();
2490
2491 gclass = g_hash_table_lookup (generic_class_cache, &helper);
2492
2493 /* A tripwire just to keep us honest */
2494 g_assert (!helper.cached_class);
2495
2496 if (gclass) {
2497 mono_loader_unlock ();
2498 return gclass;
2499 }
2500
2501 if (is_dynamic) {
2502 MonoDynamicGenericClass *dgclass = g_new0 (MonoDynamicGenericClass, 1);
2503 gclass = &dgclass->generic_class;
2504 gclass->is_dynamic = 1;
2505 } else {
2506 gclass = g_new0 (MonoGenericClass, 1);
2507 }
2508
2509 gclass->is_tb_open = is_tb_open;
2510 gclass->container_class = container_class;
2511 gclass->context.class_inst = inst;
2512 gclass->context.method_inst = NULL;
2513 if (inst == container_class->generic_container->context.class_inst && !is_tb_open)
2514 gclass->cached_class = container_class;
2515
2516 g_hash_table_insert (generic_class_cache, gclass, gclass);
2517
2518 mono_loader_unlock ();
2519
2520 return gclass;
2521 }
2522
2523 /*
2524 * mono_metadata_inflate_generic_inst:
2525 *
2526 * Instantiate the generic instance @ginst with the context @context.
2527 *
2528 */
2529 MonoGenericInst *
2530 mono_metadata_inflate_generic_inst (MonoGenericInst *ginst, MonoGenericContext *context)
2531 {
2532 MonoType **type_argv;
2533 MonoGenericInst *nginst;
2534 int i;
2535
2536 if (!ginst->is_open)
2537 return ginst;
2538
2539 type_argv = g_new0 (MonoType*, ginst->type_argc);
2540
2541 for (i = 0; i < ginst->type_argc; i++)
2542 type_argv [i] = mono_class_inflate_generic_type (ginst->type_argv [i], context);
2543
2544 nginst = mono_metadata_get_generic_inst (ginst->type_argc, type_argv);
2545
2546 for (i = 0; i < ginst->type_argc; i++)
2547 mono_metadata_free_type (type_argv [i]);
2548 g_free (type_argv);
2549
2550 return nginst;
2551 }
2552
2553 MonoGenericInst *
2554 mono_metadata_parse_generic_inst (MonoImage *m, MonoGenericContainer *container,
2555 int count, const char *ptr, const char **rptr)
2556 {
2557 MonoType **type_argv;
2558 MonoGenericInst *ginst;
2559 int i;
2560
2561 type_argv = g_new0 (MonoType*, count);
2562
2563 for (i = 0; i < count; i++) {
2564 MonoType *t = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
2565 if (!t) {
2566 g_free (type_argv);
2567 return NULL;
2568 }
2569 type_argv [i] = t;
2570 }
2571
2572 if (rptr)
2573 *rptr = ptr;
2574
2575 ginst = mono_metadata_get_generic_inst (count, type_argv);
2576
2577 g_free (type_argv);
2578
2579 return ginst;
2580 }
2581
2582 static gboolean
2583 do_mono_metadata_parse_generic_class (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2584 const char *ptr, const char **rptr)
2585 {
2586 MonoGenericInst *inst;
2587 MonoClass *gklass;
2588 MonoType *gtype;
2589 int count;
2590
2591 gtype = mono_metadata_parse_type (m, MONO_PARSE_TYPE, 0, ptr, &ptr);
2592 if (gtype == NULL)
2593 return FALSE;
2594
2595 gklass = mono_class_from_mono_type (gtype);
2596 if (!gklass->generic_container)
2597 return FALSE;
2598
2599 count = mono_metadata_decode_value (ptr, &ptr);
2600 inst = mono_metadata_parse_generic_inst (m, container, count, ptr, &ptr);
2601 if (inst == NULL)
2602 return FALSE;
2603
2604 if (rptr)
2605 *rptr = ptr;
2606
2607 type->data.generic_class = mono_metadata_lookup_generic_class (gklass, inst, FALSE);
2608 return TRUE;
2609 }
2610
2611 /*
2612 * select_container:
2613 * @gc: The generic container to normalize
2614 * @type: The kind of generic parameters the resulting generic-container should contain
2615 */
2616
2617 static MonoGenericContainer *
2618 select_container (MonoGenericContainer *gc, MonoTypeEnum type)
2619 {
2620 gboolean is_var = (type == MONO_TYPE_VAR);
2621 if (!gc)
2622 return NULL;
2623
2624 g_assert (is_var || type == MONO_TYPE_MVAR);
2625
2626 if (is_var) {
2627 if (gc->is_method || gc->parent)
2628 /*
2629 * The current MonoGenericContainer is a generic method -> its `parent'
2630 * points to the containing class'es container.
2631 */
2632 return gc->parent;
2633 }
2634
2635 return gc;
2636 }
2637
2638 /*
2639 * mono_metadata_parse_generic_param:
2640 * @generic_container: Our MonoClass's or MonoMethodNormal's MonoGenericContainer;
2641 * see mono_metadata_parse_type_full() for details.
2642 * Internal routine to parse a generic type parameter.
2643 * LOCKING: Acquires the loader lock
2644 */
2645 static MonoGenericParam *
2646 mono_metadata_parse_generic_param (MonoImage *m, MonoGenericContainer *generic_container,
2647 MonoTypeEnum type, const char *ptr, const char **rptr)
2648 {
2649 int index = mono_metadata_decode_value (ptr, &ptr);
2650 if (rptr)
2651 *rptr = ptr;
2652
2653 generic_container = select_container (generic_container, type);
2654 if (!generic_container) {
2655 /* Create dummy MonoGenericParam */
2656 MonoGenericParam *param;
2657
2658 param = mono_image_alloc0 (m, sizeof (MonoGenericParam));
2659 param->num = index;
2660 param->image = m;
2661
2662 return param;
2663 }
2664
2665 if (index >= generic_container->type_argc)
2666 return NULL;
2667
2668 return mono_generic_container_get_param (generic_container, index);
2669 }
2670
2671 /*
2672 * mono_metadata_get_shared_type:
2673 *
2674 * Return a shared instance of TYPE, if available, NULL otherwise.
2675 * Shared MonoType instances help save memory. Their contents should not be modified
2676 * by the caller. They do not need to be freed as their lifetime is bound by either
2677 * the lifetime of the runtime (builtin types), or the lifetime of the MonoClass
2678 * instance they are embedded in. If they are freed, they should be freed using
2679 * mono_metadata_free_type () instead of g_free ().
2680 */
2681 MonoType*
2682 mono_metadata_get_shared_type (MonoType *type)
2683 {
2684 MonoType *cached;
2685
2686 /* No need to use locking since nobody is modifying the hash table */
2687 if ((cached = g_hash_table_lookup (type_cache, type)))
2688 return cached;
2689
2690 switch (type->type){
2691 case MONO_TYPE_CLASS:
2692 case MONO_TYPE_VALUETYPE:
2693 if (type == &type->data.klass->byval_arg)
2694 return type;
2695 if (type == &type->data.klass->this_arg)
2696 return type;
2697 break;
2698 }
2699
2700 return NULL;
2701 }
2702
2703 /*
2704 * do_mono_metadata_parse_type:
2705 * @type: MonoType to be filled in with the return value
2706 * @m: image context
2707 * @generic_context: generics_context
2708 * @ptr: pointer to the encoded type
2709 * @rptr: pointer where the end of the encoded type is saved
2710 *
2711 * Internal routine used to "fill" the contents of @type from an
2712 * allocated pointer. This is done this way to avoid doing too
2713 * many mini-allocations (particularly for the MonoFieldType which
2714 * most of the time is just a MonoType, but sometimes might be augmented).
2715 *
2716 * This routine is used by mono_metadata_parse_type and
2717 * mono_metadata_parse_field_type
2718 *
2719 * This extracts a Type as specified in Partition II (22.2.12)
2720 *
2721 * Returns: FALSE if the type could not be loaded
2722 */
2723 static gboolean
2724 do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2725 const char *ptr, const char **rptr)
2726 {
2727 gboolean ok = TRUE;
2728 type->type = mono_metadata_decode_value (ptr, &ptr);
2729
2730 switch (type->type){
2731 case MONO_TYPE_VOID:
2732 case MONO_TYPE_BOOLEAN:
2733 case MONO_TYPE_CHAR:
2734 case MONO_TYPE_I1:
2735 case MONO_TYPE_U1:
2736 case MONO_TYPE_I2:
2737 case MONO_TYPE_U2:
2738 case MONO_TYPE_I4:
2739 case MONO_TYPE_U4:
2740 case MONO_TYPE_I8:
2741 case MONO_TYPE_U8:
2742 case MONO_TYPE_R4:
2743 case MONO_TYPE_R8:
2744 case MONO_TYPE_I:
2745 case MONO_TYPE_U:
2746 case MONO_TYPE_STRING:
2747 case MONO_TYPE_OBJECT:
2748 case MONO_TYPE_TYPEDBYREF:
2749 break;
2750 case MONO_TYPE_VALUETYPE:
2751 case MONO_TYPE_CLASS: {
2752 guint32 token;
2753 token = mono_metadata_parse_typedef_or_ref (m, ptr, &ptr);
2754 type->data.klass = mono_class_get (m, token);
2755 if (!type->data.klass)
2756 return FALSE;
2757 break;
2758 }
2759 case MONO_TYPE_SZARRAY: {
2760 MonoType *etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2761 if (!etype)
2762 return FALSE;
2763 type->data.klass = mono_class_from_mono_type (etype);
2764 if (!type->data.klass)
2765 return FALSE;
2766 break;
2767 }
2768 case MONO_TYPE_PTR:
2769 type->data.type = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2770 if (!type->data.type)
2771 return FALSE;
2772 break;
2773 case MONO_TYPE_FNPTR:
2774 type->data.method = mono_metadata_parse_method_signature_full (m, container, 0, ptr, &ptr);
2775 if (!type->data.method)
2776 return FALSE;
2777 break;
2778 case MONO_TYPE_ARRAY:
2779 type->data.array = mono_metadata_parse_array_full (m, container, ptr, &ptr);
2780 if (!type->data.array)
2781 return FALSE;
2782 break;
2783 case MONO_TYPE_MVAR:
2784 if (container && !container->is_method)
2785 return FALSE;
2786 case MONO_TYPE_VAR:
2787 type->data.generic_param = mono_metadata_parse_generic_param (m, container, type->type, ptr, &ptr);
2788 if (!type->data.generic_param)
2789 return FALSE;
2790 break;
2791 case MONO_TYPE_GENERICINST:
2792 ok = do_mono_metadata_parse_generic_class (type, m, container, ptr, &ptr);
2793 break;
2794 default:
2795 g_warning ("type 0x%02x not handled in do_mono_metadata_parse_type on image %s", type->type, m->name);
2796 return FALSE;
2797 }
2798
2799 if (rptr)
2800 *rptr = ptr;
2801 return ok;
2802 }
2803
2804 /*
2805 * mono_metadata_free_type:
2806 * @type: type to free
2807 *
2808 * Free the memory allocated for type @type which is allocated on the heap.
2809 */
2810 void
2811 mono_metadata_free_type (MonoType *type)
2812 {
2813 if (type >= builtin_types && type < builtin_types + NBUILTIN_TYPES ())
2814 return;
2815
2816 switch (type->type){
2817 case MONO_TYPE_OBJECT:
2818 case MONO_TYPE_STRING:
2819 if (!type->data.klass)
2820 break;
2821 /* fall through */
2822 case MONO_TYPE_CLASS:
2823 case MONO_TYPE_VALUETYPE:
2824 if (type == &type->data.klass->byval_arg || type == &type->data.klass->this_arg)
2825 return;
2826 break;
2827 case MONO_TYPE_PTR:
2828 mono_metadata_free_type (type->data.type);
2829 break;
2830 case MONO_TYPE_FNPTR:
2831 mono_metadata_free_method_signature (type->data.method);
2832 break;
2833 case MONO_TYPE_ARRAY:
2834 mono_metadata_free_array (type->data.array);
2835 break;
2836 }
2837
2838 g_free (type);
2839 }
2840
2841 #if 0
2842 static void
2843 hex_dump (const char *buffer, int base, int count)
2844 {
2845 int show_header = 1;
2846 int i;
2847
2848 if (count < 0){
2849 count = -count;
2850 show_header = 0;
2851 }
2852
2853 for (i = 0; i < count; i++){
2854 if (show_header)
2855 if ((i % 16) == 0)
2856 printf ("\n0x%08x: ", (unsigned char) base + i);
2857
2858 printf ("%02x ", (unsigned char) (buffer [i]));
2859 }
2860 fflush (stdout);
2861 }
2862 #endif
2863
2864 /**
2865 * @mh: The Method header
2866 * @ptr: Points to the beginning of the Section Data (25.3)
2867 */
2868 static void
2869 parse_section_data (MonoImage *m, MonoMethodHeader *mh, const unsigned char *ptr)
2870 {
2871 unsigned char sect_data_flags;
2872 const unsigned char *sptr;
2873 int is_fat;
2874 guint32 sect_data_len;
2875
2876 while (1) {
2877 /* align on 32-bit boundary */
2878 sptr = ptr = dword_align (ptr);
2879 sect_data_flags = *ptr;
2880 ptr++;
2881
2882 is_fat = sect_data_flags & METHOD_HEADER_SECTION_FAT_FORMAT;
2883 if (is_fat) {
2884 sect_data_len = (ptr [2] << 16) | (ptr [1] << 8) | ptr [0];
2885 ptr += 3;
2886 } else {
2887 sect_data_len = ptr [0];
2888 ++ptr;
2889 }
2890 /*
2891 g_print ("flags: %02x, len: %d\n", sect_data_flags, sect_data_len);
2892 hex_dump (sptr, 0, sect_data_len+8);
2893 g_print ("\nheader: ");
2894 hex_dump (sptr-4, 0, 4);
2895 g_print ("\n");
2896 */
2897
2898 if (sect_data_flags & METHOD_HEADER_SECTION_EHTABLE) {
2899 const unsigned char *p = dword_align (ptr);
2900 int i;
2901 mh->num_clauses = is_fat ? sect_data_len / 24: sect_data_len / 12;
2902 /* we could just store a pointer if we don't need to byteswap */
2903 mh->clauses = mono_image_alloc0 (m, sizeof (MonoExceptionClause) * mh->num_clauses);
2904 for (i = 0; i < mh->num_clauses; ++i) {
2905 MonoExceptionClause *ec = &mh->clauses [i];
2906 guint32 tof_value;
2907 if (is_fat) {
2908 ec->flags = read32 (p);
2909 ec->try_offset = read32 (p + 4);
2910 ec->try_len = read32 (p + 8);
2911 ec->handler_offset = read32 (p + 12);
2912 ec->handler_len = read32 (p + 16);
2913 tof_value = read32 (p + 20);
2914 p += 24;
2915 } else {
2916 ec->flags = read16 (p);
2917 ec->try_offset = read16 (p + 2);
2918 ec->try_len = *(p + 4);
2919 ec->handler_offset = read16 (p + 5);
2920 ec->handler_len = *(p + 7);
2921 tof_value = read32 (p + 8);
2922 p += 12;
2923 }
2924 if (ec->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2925 ec->data.filter_offset = tof_value;
2926 } else if (ec->flags == MONO_EXCEPTION_CLAUSE_NONE) {
2927 ec->data.catch_class = tof_value? mono_class_get (m, tof_value): 0;
2928 } else {
2929 ec->data.catch_class = NULL;
2930 }
2931 /* g_print ("try %d: %x %04x-%04x %04x\n", i, ec->flags, ec->try_offset, ec->try_offset+ec->try_len, ec->try_len); */
2932 }
2933
2934 }
2935 if (sect_data_flags & METHOD_HEADER_SECTION_MORE_SECTS)
2936 ptr += sect_data_len - 4; /* LAMESPEC: it seems the size includes the header */
2937 else
2938 return;
2939 }
2940 }
2941
2942 /*
2943 * mono_metadata_parse_mh_full:
2944 * @m: metadata context
2945 * @generic_context: generics context
2946 * @ptr: pointer to the method header.
2947 *
2948 * Decode the method header at @ptr, including pointer to the IL code,
2949 * info about local variables and optional exception tables.
2950 * This is a Mono runtime internal function.
2951 *
2952 * LOCKING: Acquires the loader lock.
2953 *
2954 * Returns: a MonoMethodHeader allocated from the image mempool.
2955 */
2956 MonoMethodHeader *
2957 mono_metadata_parse_mh_full (MonoImage *m, MonoGenericContainer *container, const char *ptr)
2958 {
2959 MonoMethodHeader *mh;
2960 unsigned char flags = *(const unsigned char *) ptr;
2961 unsigned char format = flags & METHOD_HEADER_FORMAT_MASK;
2962 guint16 fat_flags;
2963 guint32 local_var_sig_tok, max_stack, code_size, init_locals;
2964 const unsigned char *code;
2965 int hsize;
2966
2967 g_return_val_if_fail (ptr != NULL, NULL);
2968
2969 switch (format) {
2970 case METHOD_HEADER_TINY_FORMAT:
2971 mh = mono_image_alloc0 (m, MONO_SIZEOF_METHOD_HEADER);
2972 ptr++;
2973 mh->max_stack = 8;
2974 local_var_sig_tok = 0;
2975 mh->code_size = flags >> 2;
2976 mh->code = (unsigned char*)ptr;
2977 return mh;
2978 case METHOD_HEADER_FAT_FORMAT:
2979 fat_flags = read16 (ptr);
2980 ptr += 2;
2981 hsize = (fat_flags >> 12) & 0xf;
2982 max_stack = read16 (ptr);
2983 ptr += 2;
2984 code_size = read32 (ptr);
2985 ptr += 4;
2986 local_var_sig_tok = read32 (ptr);
2987 ptr += 4;
2988
2989 if (fat_flags & METHOD_HEADER_INIT_LOCALS)
2990 init_locals = 1;
2991 else
2992 init_locals = 0;
2993
2994 code = (unsigned char*)ptr;
2995
2996 if (!(fat_flags & METHOD_HEADER_MORE_SECTS))
2997 break;
2998
2999 /*
3000 * There are more sections
3001 */
3002 ptr = (char*)code + code_size;
3003 break;
3004 default:
3005 return NULL;
3006 }
3007
3008 if (local_var_sig_tok) {
3009 MonoTableInfo *t = &m->tables [MONO_TABLE_STANDALONESIG];
3010 const char *locals_ptr;
3011 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
3012 int len=0, i, bsize;
3013
3014 mono_metadata_decode_row (t, (local_var_sig_tok & 0xffffff)-1, cols, 1);
3015
3016 if (!mono_verifier_verify_standalone_signature (m, cols [MONO_STAND_ALONE_SIGNATURE], NULL))
3017 return NULL;
3018
3019 locals_ptr = mono_metadata_blob_heap (m, cols [MONO_STAND_ALONE_SIGNATURE]);
3020 bsize = mono_metadata_decode_blob_size (locals_ptr, &locals_ptr);
3021 if (*locals_ptr != 0x07)
3022 g_warning ("wrong signature for locals blob");
3023 locals_ptr++;
3024 len = mono_metadata_decode_value (locals_ptr, &locals_ptr);
3025 mh = mono_image_alloc0 (m, MONO_SIZEOF_METHOD_HEADER + len * sizeof (MonoType*));
3026 mh->num_locals = len;
3027 for (i = 0; i < len; ++i) {
3028 mh->locals [i] = mono_metadata_parse_type_full (
3029 m, container, MONO_PARSE_LOCAL, 0, locals_ptr, &locals_ptr);
3030 if (!mh->locals [i]) {
3031 return NULL;
3032 }
3033 }
3034 } else {
3035 mh = mono_image_alloc0 (m, MONO_SIZEOF_METHOD_HEADER);
3036 }
3037 mh->code = code;
3038 mh->code_size = code_size;
3039 mh->max_stack = max_stack;
3040 mh->init_locals = init_locals;
3041 if (fat_flags & METHOD_HEADER_MORE_SECTS)
3042 parse_section_data (m, mh, (const unsigned char*)ptr);
3043 return mh;
3044 }
3045
3046 /*
3047 * mono_metadata_parse_mh:
3048 * @generic_context: generics context
3049 * @ptr: pointer to the method header.
3050 *
3051 * Decode the method header at @ptr, including pointer to the IL code,
3052 * info about local variables and optional exception tables.
3053 * This is a Mono runtime internal function.
3054 *
3055 * Returns: a MonoMethodHeader.
3056 */
3057 MonoMethodHeader *
3058 mono_metadata_parse_mh (MonoImage *m, const char *ptr)
3059 {
3060 MonoMethodHeader *res;
3061
3062 mono_loader_lock ();
3063
3064 res = mono_metadata_parse_mh_full (m, NULL, ptr);
3065
3066 mono_loader_unlock ();
3067
3068 return res;
3069 }
3070
3071 /*
3072 * mono_metadata_free_mh:
3073 * @mh: a method header
3074 *
3075 * Free the memory allocated for the method header.
3076 * This is a Mono runtime internal function.
3077 */
3078 void
3079 mono_metadata_free_mh (MonoMethodHeader *mh)
3080 {
3081 /* Allocated from the mempool */
3082 }
3083
3084 /*
3085 * mono_method_header_get_code:
3086 * @header: a MonoMethodHeader pointer
3087 * @code_size: memory location for returning the code size
3088 * @max_stack: memory location for returning the max stack
3089 *
3090 * Method header accessor to retreive info about the IL code properties:
3091 * a pointer to the IL code itself, the size of the code and the max number
3092 * of stack slots used by the code.
3093 *
3094 * Returns: pointer to the IL code represented by the method header.
3095 */
3096 const unsigned char*
3097 mono_method_header_get_code (MonoMethodHeader *header, guint32* code_size, guint32* max_stack)
3098 {
3099 if (code_size)
3100 *code_size = header->code_size;
3101 if (max_stack)
3102 *max_stack = header->max_stack;
3103 return header->code;
3104 }
3105
3106 /*
3107 * mono_method_header_get_locals:
3108 * @header: a MonoMethodHeader pointer
3109 * @num_locals: memory location for returning the number of local variables
3110 * @init_locals: memory location for returning the init_locals flag
3111 *
3112 * Method header accessor to retreive info about the local variables:
3113 * an array of local types, the number of locals and whether the locals
3114 * are supposed to be initialized to 0 on method entry
3115 *
3116 * Returns: pointer to an array of types of the local variables
3117 */
3118 MonoType**
3119 mono_method_header_get_locals (MonoMethodHeader *header, guint32* num_locals, gboolean *init_locals)
3120 {
3121 if (num_locals)
3122 *num_locals = header->num_locals;
3123 if (init_locals)
3124 *init_locals = header->init_locals;
3125 return header->locals;
3126 }
3127
3128 /*
3129 * mono_method_header_get_num_clauses:
3130 * @header: a MonoMethodHeader pointer
3131 *
3132 * Method header accessor to retreive the number of exception clauses.
3133 *
3134 * Returns: the number of exception clauses present
3135 */
3136 int
3137 mono_method_header_get_num_clauses (MonoMethodHeader *header)
3138 {
3139 return header->num_clauses;
3140 }
3141
3142 /*
3143 * mono_method_header_get_clauses:
3144 * @header: a MonoMethodHeader pointer
3145 * @method: MonoMethod the header belongs to
3146 * @iter: pointer to a iterator
3147 * @clause: pointer to a MonoExceptionClause structure which will be filled with the info
3148 *
3149 * Get the info about the exception clauses in the method. Set *iter to NULL to
3150 * initiate the iteration, then call the method repeatedly until it returns FALSE.
3151 * At each iteration, the structure pointed to by clause if filled with the
3152 * exception clause information.
3153 *
3154 * Returns: TRUE if clause was filled with info, FALSE if there are no more exception
3155 * clauses.
3156 */
3157 int
3158 mono_method_header_get_clauses (MonoMethodHeader *header, MonoMethod *method, gpointer *iter, MonoExceptionClause *clause)
3159 {
3160 MonoExceptionClause *sc;
3161 /* later we'll be able to use this interface to parse the clause info on demand,
3162 * without allocating anything.
3163 */
3164 if (!iter || !header->num_clauses)
3165 return FALSE;
3166 if (!*iter) {
3167 *iter = sc = header->clauses;
3168 *clause = *sc;
3169 return TRUE;
3170 }
3171 sc = *iter;
3172 sc++;
3173 if (sc < header->clauses + header->num_clauses) {
3174 *iter = sc;
3175 *clause = *sc;
3176 return TRUE;
3177 }
3178 return FALSE;
3179 }
3180
3181 /**
3182 * mono_metadata_parse_field_type:
3183 * @m: metadata context to extract information from
3184 * @ptr: pointer to the field signature
3185 * @rptr: pointer updated to match the end of the decoded stream
3186 *
3187 * Parses the field signature, and returns the type information for it.
3188 *
3189 * Returns: The MonoType that was extracted from @ptr.
3190 */
3191 MonoType *
3192 mono_metadata_parse_field_type (MonoImage *m, short field_flags, const char *ptr, const char **rptr)
3193 {
3194 return mono_metadata_parse_type (m, MONO_PARSE_FIELD, field_flags, ptr, rptr);
3195 }
3196
3197 /**
3198 * mono_metadata_parse_param:
3199 * @m: metadata context to extract information from
3200 * @ptr: pointer to the param signature
3201 * @rptr: pointer updated to match the end of the decoded stream
3202 *
3203 * Parses the param signature, and returns the type information for it.
3204 *
3205 * Returns: The MonoType that was extracted from @ptr.
3206 */
3207 MonoType *
3208 mono_metadata_parse_param (MonoImage *m, const char *ptr, const char **rptr)
3209 {
3210 return mono_metadata_parse_type (m, MONO_PARSE_PARAM, 0, ptr, rptr);
3211 }
3212
3213 /*
3214 * mono_metadata_token_from_dor:
3215 * @dor_token: A TypeDefOrRef coded index
3216 *
3217 * dor_token is a TypeDefOrRef coded index: it contains either
3218 * a TypeDef, TypeRef or TypeSpec in the lower bits, and the upper
3219 * bits contain an index into the table.
3220 *
3221 * Returns: an expanded token
3222 */
3223 guint32
3224 mono_metadata_token_from_dor (guint32 dor_index)
3225 {
3226 guint32 table, idx;
3227
3228 table = dor_index & 0x03;
3229 idx = dor_index >> 2;
3230
3231 switch (table){
3232 case 0: /* TypeDef */
3233 return MONO_TOKEN_TYPE_DEF | idx;
3234 case 1: /* TypeRef */
3235 return MONO_TOKEN_TYPE_REF | idx;
3236 case 2: /* TypeSpec */
3237 return MONO_TOKEN_TYPE_SPEC | idx;
3238 default:
3239 g_assert_not_reached ();
3240 }
3241
3242 return 0;
3243 }
3244
3245 /*
3246 * We use this to pass context information to the row locator
3247 */
3248 typedef struct {
3249 int idx; /* The index that we are trying to locate */
3250 int col_idx; /* The index in the row where idx may be stored */
3251 MonoTableInfo *t; /* pointer to the table */
3252 guint32 result;
3253 } locator_t;
3254
3255 /*
3256 * How the row locator works.
3257 *
3258 * Table A
3259 * ___|___
3260 * ___|___ Table B
3261 * ___|___------> _______
3262 * ___|___ _______
3263 *
3264 * A column in the rows of table A references an index in table B.
3265 * For example A may be the TYPEDEF table and B the METHODDEF table.
3266 *
3267 * Given an index in table B we want to get the row in table A
3268 * where the column n references our index in B.
3269 *
3270 * In the locator_t structure:
3271 * t is table A
3272 * col_idx is the column number
3273 * index is the index in table B
3274 * result will be the index in table A
3275 *
3276 * Examples:
3277 * Table A Table B column (in table A)
3278 * TYPEDEF METHODDEF MONO_TYPEDEF_METHOD_LIST
3279 * TYPEDEF FIELD MONO_TYPEDEF_FIELD_LIST
3280 * PROPERTYMAP PROPERTY MONO_PROPERTY_MAP_PROPERTY_LIST
3281 * INTERFIMPL TYPEDEF MONO_INTERFACEIMPL_CLASS
3282 * METHODSEM PROPERTY ASSOCIATION (encoded index)
3283 *
3284 * Note that we still don't support encoded indexes.
3285 *
3286 */
3287 static int
3288 typedef_locator (const void *a, const void *b)
3289 {
3290 locator_t *loc = (locator_t *) a;
3291 const char *bb = (const char *) b;
3292 int typedef_index = (bb - loc->t->base) / loc->t->row_size;
3293 guint32 col, col_next;
3294
3295 col = mono_metadata_decode_row_col (loc->t, typedef_index, loc->col_idx);
3296
3297 if (loc->idx < col)
3298 return -1;
3299
3300 /*
3301 * Need to check that the next row is valid.
3302 */
3303 if (typedef_index + 1 < loc->t->rows) {
3304 col_next = mono_metadata_decode_row_col (loc->t, typedef_index + 1, loc->col_idx);
3305 if (loc->idx >= col_next)
3306 return 1;
3307
3308 if (col == col_next)
3309 return 1;
3310 }
3311
3312 loc->result = typedef_index;
3313
3314 return 0;
3315 }
3316
3317 static int
3318 table_locator (const void *a, const void *b)
3319 {
3320 locator_t *loc = (locator_t *) a;
3321 const char *bb = (const char *) b;
3322 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
3323 guint32 col;
3324
3325 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
3326
3327 if (loc->idx == col) {
3328 loc->result = table_index;
3329 return 0;
3330 }
3331 if (loc->idx < col)
3332 return -1;
3333 else
3334 return 1;
3335 }
3336
3337 static int
3338 declsec_locator (const void *a, const void *b)
3339 {
3340 locator_t *loc = (locator_t *) a;
3341 const char *bb = (const char *) b;
3342 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
3343 guint32 col;
3344
3345 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
3346
3347 if (loc->idx == col) {
3348 loc->result = table_index;
3349 return 0;
3350 }
3351 if (loc->idx < col)
3352 return -1;
3353 else
3354 return 1;
3355 }
3356
3357 /**
3358 * search_ptr_table:
3359 *
3360 * Return the 1-based row index in TABLE, which must be one of the *Ptr tables,
3361 * which contains IDX.
3362 */
3363 static guint32
3364 search_ptr_table (MonoImage *image, int table, int idx)
3365 {
3366 MonoTableInfo *ptrdef = &image->tables [table];
3367 int i;
3368
3369 /* Use a linear search to find our index in the table */
3370 for (i = 0; i < ptrdef->rows; i ++)
3371 /* All the Ptr tables have the same structure */
3372 if (mono_metadata_decode_row_col (ptrdef, i, 0) == idx)
3373 break;
3374
3375 if (i < ptrdef->rows)
3376 return i + 1;
3377 else
3378 return idx;
3379 }
3380
3381 /**
3382 * mono_metadata_typedef_from_field:
3383 * @meta: metadata context
3384 * @index: FieldDef token
3385 *
3386 * Returns: the 1-based index into the TypeDef table of the type that
3387 * declared the field described by @index, or 0 if not found.
3388 */
3389 guint32
3390 mono_metadata_typedef_from_field (MonoImage *meta, guint32 index)
3391 {
3392 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
3393 locator_t loc;
3394
3395 if (!tdef->base)
3396 return 0;
3397
3398 loc.idx = mono_metadata_token_index (index);
3399 loc.col_idx = MONO_TYPEDEF_FIELD_LIST;
3400 loc.t = tdef;
3401
3402 if (meta->uncompressed_metadata)
3403 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
3404
3405 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
3406 g_assert_not_reached ();
3407
3408 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3409 return loc.result + 1;
3410 }
3411
3412 /*
3413 * mono_metadata_typedef_from_method:
3414 * @meta: metadata context
3415 * @index: MethodDef token
3416 *
3417 * Returns: the 1-based index into the TypeDef table of the type that
3418 * declared the method described by @index. 0 if not found.
3419 */
3420 guint32
3421 mono_metadata_typedef_from_method (MonoImage *meta, guint32 index)
3422 {
3423 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
3424 locator_t loc;
3425
3426 if (!tdef->base)
3427 return 0;
3428
3429 loc.idx = mono_metadata_token_index (index);
3430 loc.col_idx = MONO_TYPEDEF_METHOD_LIST;
3431 loc.t = tdef;
3432
3433 if (meta->uncompressed_metadata)
3434 loc.idx = search_ptr_table (meta, MONO_TABLE_METHOD_POINTER, loc.idx);
3435
3436 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
3437 g_assert_not_reached ();
3438
3439 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3440 return loc.result + 1;
3441 }
3442
3443 /*
3444 * mono_metadata_interfaces_from_typedef_full:
3445 * @meta: metadata context
3446 * @index: typedef token
3447 * @interfaces: Out parameter used to store the interface array
3448 * @count: Out parameter used to store the number of interfaces
3449 * @heap_alloc_result: if TRUE the result array will be g_malloc'd
3450 * @context: The generic context
3451 *
3452 * The array of interfaces that the @index typedef token implements is returned in
3453 * @interfaces. The number of elements in the array is returned in @count.
3454 *
3455 * LOCKING: Assumes the loader lock is held.
3456 *
3457 * Returns: TRUE on success, FALSE on failure.
3458 */
3459 gboolean
3460 mono_metadata_interfaces_from_typedef_full (MonoImage *meta, guint32 index, MonoClass ***interfaces, guint *count, gboolean heap_alloc_result, MonoGenericContext *context)
3461 {
3462 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_INTERFACEIMPL];
3463 locator_t loc;
3464 guint32 start, pos;
3465 guint32 cols [MONO_INTERFACEIMPL_SIZE];
3466 MonoClass **result;
3467
3468 *interfaces = NULL;
3469 *count = 0;
3470
3471 if (!tdef->base)
3472 return TRUE;
3473
3474 loc.idx = mono_metadata_token_index (index);
3475 loc.col_idx = MONO_INTERFACEIMPL_CLASS;
3476 loc.t = tdef;
3477
3478 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3479 return TRUE;
3480
3481 start = loc.result;
3482 /*
3483 * We may end up in the middle of the rows...
3484 */
3485 while (start > 0) {
3486 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_INTERFACEIMPL_CLASS))
3487 start--;
3488 else
3489 break;
3490 }
3491 pos = start;
3492 while (pos < tdef->rows) {
3493 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
3494 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
3495 break;
3496 ++pos;
3497 }
3498
3499 if (heap_alloc_result)
3500 result = g_new0 (MonoClass*, pos - start);
3501 else
3502 result = mono_image_alloc0 (meta, sizeof (MonoClass*) * (pos - start));
3503
3504 pos = start;
3505 while (pos < tdef->rows) {
3506 MonoClass *iface;
3507
3508 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
3509 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
3510 break;
3511 iface = mono_class_get_full (
3512 meta, mono_metadata_token_from_dor (cols [MONO_INTERFACEIMPL_INTERFACE]), context);
3513 if (iface == NULL)
3514 return FALSE;
3515 result [pos - start] = iface;
3516 ++pos;
3517 }
3518 *count = pos - start;
3519 *interfaces = result;
3520 return TRUE;
3521 }
3522
3523 /*
3524 * @meta: metadata context
3525 * @index: typedef token
3526 * @count: Out parameter used to store the number of interfaces
3527 *
3528 * The array of interfaces that the @index typedef token implements is returned in
3529 * @interfaces. The number of elements in the array is returned in @count. The returned
3530 * array is g_malloc'd and the caller must free it.
3531 *
3532 * LOCKING: Acquires the loader lock .
3533 *
3534 * Returns: the interface array on success, NULL on failure.
3535 */
3536
3537 MonoClass**
3538 mono_metadata_interfaces_from_typedef (MonoImage *meta, guint32 index, guint *count)
3539 {
3540 MonoClass **interfaces;
3541 gboolean rv;
3542
3543 mono_loader_lock ();
3544 rv = mono_metadata_interfaces_from_typedef_full (meta, index, &interfaces, count, TRUE, NULL);
3545 mono_loader_unlock ();
3546 if (rv)
3547 return interfaces;
3548 else
3549 return NULL;
3550 }
3551
3552 /*
3553 * mono_metadata_nested_in_typedef:
3554 * @meta: metadata context
3555 * @index: typedef token
3556 *
3557 * Returns: the 1-based index into the TypeDef table of the type
3558 * where the type described by @index is nested.
3559 * Retruns 0 if @index describes a non-nested type.
3560 */
3561 guint32
3562 mono_metadata_nested_in_typedef (MonoImage *meta, guint32 index)
3563 {
3564 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
3565 locator_t loc;
3566
3567 if (!tdef->base)
3568 return 0;
3569
3570 loc.idx = mono_metadata_token_index (index);
3571 loc.col_idx = MONO_NESTED_CLASS_NESTED;
3572 loc.t = tdef;
3573
3574 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3575 return 0;
3576
3577 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3578 return mono_metadata_decode_row_col (tdef, loc.result, MONO_NESTED_CLASS_ENCLOSING) | MONO_TOKEN_TYPE_DEF;
3579 }
3580
3581 /*
3582 * mono_metadata_nesting_typedef:
3583 * @meta: metadata context
3584 * @index: typedef token
3585 *
3586 * Returns: the 1-based index into the TypeDef table of the first type
3587 * that is nested inside the type described by @index. The search starts at
3588 * @start_index. returns 0 if no such type is found.
3589 */
3590 guint32
3591 mono_metadata_nesting_typedef (MonoImage *meta, guint32 index, guint32 start_index)
3592 {
3593 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
3594 guint32 start;
3595 guint32 class_index = mono_metadata_token_index (index);
3596
3597 if (!tdef->base)
3598 return 0;
3599
3600 start = start_index;
3601
3602 while (start <= tdef->rows) {
3603 if (class_index == mono_metadata_decode_row_col (tdef, start - 1, MONO_NESTED_CLASS_ENCLOSING))
3604 break;
3605 else
3606 start++;
3607 }
3608
3609 if (start > tdef->rows)
3610 return 0;
3611 else
3612 return start;
3613 }
3614
3615 /*
3616 * mono_metadata_packing_from_typedef:
3617 * @meta: metadata context
3618 * @index: token representing a type
3619 *
3620 * Returns: the info stored in the ClassLAyout table for the given typedef token
3621 * into the @packing and @size pointers.
3622 * Returns 0 if the info is not found.
3623 */
3624 guint32
3625 mono_metadata_packing_from_typedef (MonoImage *meta, guint32 index, guint32 *packing, guint32 *size)
3626 {
3627 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CLASSLAYOUT];
3628 locator_t loc;
3629 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
3630
3631 if (!tdef->base)
3632 return 0;
3633
3634 loc.idx = mono_metadata_token_index (index);
3635 loc.col_idx = MONO_CLASS_LAYOUT_PARENT;
3636 loc.t = tdef;
3637
3638 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3639 return 0;
3640
3641 mono_metadata_decode_row (tdef, loc.result, cols, MONO_CLASS_LAYOUT_SIZE);
3642 if (packing)
3643 *packing = cols [MONO_CLASS_LAYOUT_PACKING_SIZE];
3644 if (size)
3645 *size = cols [MONO_CLASS_LAYOUT_CLASS_SIZE];
3646
3647 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3648 return loc.result + 1;
3649 }
3650
3651 /*
3652 * mono_metadata_custom_attrs_from_index:
3653 * @meta: metadata context
3654 * @index: token representing the parent
3655 *
3656 * Returns: the 1-based index into the CustomAttribute table of the first
3657 * attribute which belongs to the metadata object described by @index.
3658 * Returns 0 if no such attribute is found.
3659 */
3660 guint32
3661 mono_metadata_custom_attrs_from_index (MonoImage *meta, guint32 index)
3662 {
3663 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CUSTOMATTRIBUTE];
3664 locator_t loc;
3665
3666 if (!tdef->base)
3667 return 0;
3668
3669 loc.idx = index;
3670 loc.col_idx = MONO_CUSTOM_ATTR_PARENT;
3671 loc.t = tdef;
3672
3673 /* FIXME: Index translation */
3674
3675 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3676 return 0;
3677
3678 /* Find the first entry by searching backwards */
3679 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_CUSTOM_ATTR_PARENT) == index))
3680 loc.result --;
3681
3682 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3683 return loc.result + 1;
3684 }
3685
3686 /*
3687 * mono_metadata_declsec_from_index:
3688 * @meta: metadata context
3689 * @index: token representing the parent
3690 *
3691 * Returns: the 0-based index into the DeclarativeSecurity table of the first
3692 * attribute which belongs to the metadata object described by @index.
3693 * Returns -1 if no such attribute is found.
3694 */
3695 guint32
3696 mono_metadata_declsec_from_index (MonoImage *meta, guint32 index)
3697 {
3698 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_DECLSECURITY];
3699 locator_t loc;
3700
3701 if (!tdef->base)
3702 return -1;
3703
3704 loc.idx = index;
3705 loc.col_idx = MONO_DECL_SECURITY_PARENT;
3706 loc.t = tdef;
3707
3708 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, declsec_locator))
3709 return -1;
3710
3711 /* Find the first entry by searching backwards */
3712 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_DECL_SECURITY_PARENT) == index))
3713 loc.result --;
3714
3715 return loc.result;
3716 }
3717
3718 #ifdef DEBUG
3719 static void
3720 mono_backtrace (int limit)
3721 {
3722 void *array[limit];
3723 char **names;
3724 int i;
3725 backtrace (array, limit);
3726 names = backtrace_symbols (array, limit);
3727 for (i =0; i < limit; ++i) {
3728 g_print ("\t%s\n", names [i]);
3729 }
3730 g_free (names);
3731 }
3732 #endif
3733
3734 #ifndef __GNUC__
3735 /*#define __alignof__(a) sizeof(a)*/
3736 #define __alignof__(type) G_STRUCT_OFFSET(struct { char c; type x; }, x)
3737 #endif
3738
3739 /*
3740 * mono_type_size:
3741 * @t: the type to return the size of
3742 *
3743 * Returns: the number of bytes required to hold an instance of this
3744 * type in memory
3745 */
3746 int
3747 mono_type_size (MonoType *t, int *align)
3748 {
3749 if (!t) {
3750 *align = 1;
3751 return 0;
3752 }
3753 if (t->byref) {
3754 *align = __alignof__(gpointer);
3755 return sizeof (gpointer);
3756 }
3757
3758 switch (t->type){
3759 case MONO_TYPE_VOID:
3760 *align = 1;
3761 return 0;
3762 case MONO_TYPE_BOOLEAN:
3763 *align = __alignof__(gint8);
3764 return 1;
3765 case MONO_TYPE_I1:
3766 case MONO_TYPE_U1:
3767 *align = __alignof__(gint8);
3768 return 1;
3769 case MONO_TYPE_CHAR:
3770 case MONO_TYPE_I2:
3771 case MONO_TYPE_U2:
3772 *align = __alignof__(gint16);
3773 return 2;
3774 case MONO_TYPE_I4:
3775 case MONO_TYPE_U4:
3776 *align = __alignof__(gint32);
3777 return 4;
3778 case MONO_TYPE_R4:
3779 *align = __alignof__(float);
3780 return 4;
3781 case MONO_TYPE_I8:
3782 case MONO_TYPE_U8:
3783 *align = __alignof__(gint64);
3784 return 8;
3785 case MONO_TYPE_R8:
3786 *align = __alignof__(double);
3787 return 8;
3788 case MONO_TYPE_I:
3789 case MONO_TYPE_U:
3790 *align = __alignof__(gpointer);
3791 return sizeof (gpointer);
3792 case MONO_TYPE_STRING:
3793 *align = __alignof__(gpointer);
3794 return sizeof (gpointer);
3795 case MONO_TYPE_OBJECT:
3796 *align = __alignof__(gpointer);
3797 return sizeof (gpointer);
3798 case MONO_TYPE_VALUETYPE: {
3799 if (t->data.klass->enumtype)
3800 return mono_type_size (mono_class_enum_basetype (t->data.klass), align);
3801 else
3802 return mono_class_value_size (t->data.klass, (guint32*)align);
3803 }
3804 case MONO_TYPE_CLASS:
3805 case MONO_TYPE_SZARRAY:
3806 case MONO_TYPE_PTR:
3807 case MONO_TYPE_FNPTR:
3808 case MONO_TYPE_ARRAY:
3809 *align = __alignof__(gpointer);
3810 return sizeof (gpointer);
3811 case MONO_TYPE_TYPEDBYREF:
3812 return mono_class_value_size (mono_defaults.typed_reference_class, (guint32*)align);
3813 case MONO_TYPE_GENERICINST: {
3814 MonoGenericClass *gclass = t->data.generic_class;
3815 MonoClass *container_class = gclass->container_class;
3816
3817 // g_assert (!gclass->inst->is_open);
3818
3819 if (container_class->valuetype) {
3820 if (container_class->enumtype)
3821 return mono_type_size (mono_class_enum_basetype (container_class), align);
3822 else
3823 return mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
3824 } else {
3825 *align = __alignof__(gpointer);
3826 return sizeof (gpointer);
3827 }
3828 }
3829 case MONO_TYPE_VAR:
3830 case MONO_TYPE_MVAR:
3831 /* FIXME: Martin, this is wrong. */
3832 *align = __alignof__(gpointer);
3833 return sizeof (gpointer);
3834 default:
3835 g_error ("mono_type_size: type 0x%02x unknown", t->type);
3836 }
3837 return 0;
3838 }
3839
3840 /*
3841 * mono_type_stack_size:
3842 * @t: the type to return the size it uses on the stack
3843 *
3844 * Returns: the number of bytes required to hold an instance of this
3845 * type on the runtime stack
3846 */
3847 int
3848 mono_type_stack_size (MonoType *t, int *align)
3849 {
3850 return mono_type_stack_size_internal (t, align, FALSE);
3851 }
3852
3853 int
3854 mono_type_stack_size_internal (MonoType *t, int *align, gboolean allow_open)
3855 {
3856 int tmp;
3857 #if SIZEOF_VOID_P == SIZEOF_REGISTER
3858 int stack_slot_size = sizeof (gpointer);
3859 int stack_slot_align = __alignof__ (gpointer);
3860 #elif SIZEOF_VOID_P < SIZEOF_REGISTER
3861 int stack_slot_size = SIZEOF_REGISTER;
3862 int stack_slot_align = SIZEOF_REGISTER;
3863 #endif
3864
3865 g_assert (t != NULL);
3866
3867 if (!align)
3868 align = &tmp;
3869
3870 if (t->byref) {
3871 *align = stack_slot_align;
3872 return stack_slot_size;
3873 }
3874
3875 switch (t->type){
3876 case MONO_TYPE_BOOLEAN:
3877 case MONO_TYPE_CHAR:
3878 case MONO_TYPE_I1:
3879 case MONO_TYPE_U1:
3880 case MONO_TYPE_I2:
3881 case MONO_TYPE_U2:
3882 case MONO_TYPE_I4:
3883 case MONO_TYPE_U4:
3884 case MONO_TYPE_I:
3885 case MONO_TYPE_U:
3886 case MONO_TYPE_STRING:
3887 case MONO_TYPE_OBJECT:
3888 case MONO_TYPE_CLASS:
3889 case MONO_TYPE_SZARRAY:
3890 case MONO_TYPE_PTR:
3891 case MONO_TYPE_FNPTR:
3892 case MONO_TYPE_ARRAY:
3893 *align = stack_slot_align;
3894 return stack_slot_size;
3895 case MONO_TYPE_VAR:
3896 case MONO_TYPE_MVAR:
3897 g_assert (allow_open);
3898 *align = stack_slot_align;
3899 return stack_slot_size;
3900 case MONO_TYPE_TYPEDBYREF:
3901 *align = stack_slot_align;
3902 return stack_slot_size * 3;
3903 case MONO_TYPE_R4:
3904 *align = __alignof__(float);
3905 return sizeof (float);
3906 case MONO_TYPE_I8:
3907 case MONO_TYPE_U8:
3908 *align = __alignof__(gint64);
3909 return sizeof (gint64);
3910 case MONO_TYPE_R8:
3911 *align = __alignof__(double);
3912 return sizeof (double);
3913 case MONO_TYPE_VALUETYPE: {
3914 guint32 size;
3915
3916 if (t->data.klass->enumtype)
3917 return mono_type_stack_size_internal (mono_class_enum_basetype (t->data.klass), align, allow_open);
3918 else {
3919 size = mono_class_value_size (t->data.klass, (guint32*)align);
3920
3921 *align = *align + stack_slot_align - 1;
3922 *align &= ~(stack_slot_align - 1);
3923
3924 size += stack_slot_size - 1;
3925 size &= ~(stack_slot_size - 1);
3926
3927 return size;
3928 }
3929 }
3930 case MONO_TYPE_GENERICINST: {
3931 MonoGenericClass *gclass = t->data.generic_class;
3932 MonoClass *container_class = gclass->container_class;
3933
3934 if (!allow_open)
3935 g_assert (!gclass->context.class_inst->is_open);
3936
3937 if (container_class->valuetype) {
3938 if (container_class->enumtype)
3939 return mono_type_stack_size_internal (mono_class_enum_basetype (container_class), align, allow_open);
3940 else {
3941 guint32 size = mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
3942
3943 *align = *align + stack_slot_align - 1;
3944 *align &= ~(stack_slot_align - 1);
3945
3946 size += stack_slot_size - 1;
3947 size &= ~(stack_slot_size - 1);
3948
3949 return size;
3950 }
3951 } else {
3952 *align = stack_slot_align;
3953 return stack_slot_size;
3954 }
3955 }
3956 default:
3957 g_error ("type 0x%02x unknown", t->type);
3958 }
3959 return 0;
3960 }
3961
3962 gboolean
3963 mono_type_generic_inst_is_valuetype (MonoType *type)
3964 {
3965 g_assert (type->type == MONO_TYPE_GENERICINST);
3966 return type->data.generic_class->container_class->valuetype;
3967 }
3968
3969 gboolean
3970 mono_metadata_generic_class_is_valuetype (MonoGenericClass *gclass)
3971 {
3972 return gclass->container_class->valuetype;
3973 }
3974
3975 static gboolean
3976 _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2, gboolean signature_only)
3977 {
3978 MonoGenericInst *i1 = g1->context.class_inst;
3979 MonoGenericInst *i2 = g2->context.class_inst;
3980
3981 if (g1->is_dynamic != g2->is_dynamic)
3982 return FALSE;
3983 if (!mono_metadata_class_equal (g1->container_class, g2->container_class, signature_only))
3984 return FALSE;
3985 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
3986 return FALSE;
3987 return g1->is_tb_open == g2->is_tb_open;
3988 }
3989
3990 static gboolean
3991 _mono_metadata_generic_class_container_equal (const MonoGenericClass *g1, MonoClass *c2, gboolean signature_only)
3992 {
3993 MonoGenericInst *i1 = g1->context.class_inst;
3994 MonoGenericInst *i2 = c2->generic_container->context.class_inst;
3995
3996 if (!mono_metadata_class_equal (g1->container_class, c2, signature_only))
3997 return FALSE;
3998 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
3999 return FALSE;
4000 return !g1->is_tb_open;
4001 }
4002
4003 guint
4004 mono_metadata_generic_context_hash (const MonoGenericContext *context)
4005 {
4006 /* FIXME: check if this seed is good enough */
4007 guint hash = 0xc01dfee7;
4008 if (context->class_inst)
4009 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->class_inst);
4010 if (context->method_inst)
4011 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->method_inst);
4012 return hash;
4013 }
4014
4015 gboolean
4016 mono_metadata_generic_context_equal (const MonoGenericContext *g1, const MonoGenericContext *g2)
4017 {
4018 return g1->class_inst == g2->class_inst && g1->method_inst == g2->method_inst;
4019 }
4020
4021 /*
4022 * mono_metadata_type_hash:
4023 * @t1: a type
4024 *
4025 * Computes an hash value for @t1 to be used in GHashTable.
4026 */
4027 guint
4028 mono_metadata_type_hash (MonoType *t1)
4029 {
4030 guint hash = t1->type;
4031
4032 hash |= t1->byref << 6; /* do not collide with t1->type values */
4033 switch (t1->type) {
4034 case MONO_TYPE_VALUETYPE:
4035 case MONO_TYPE_CLASS:
4036 case MONO_TYPE_SZARRAY:
4037 /* check if the distribution is good enough */
4038 return ((hash << 5) - hash) ^ g_str_hash (t1->data.klass->name);
4039 case MONO_TYPE_PTR:
4040 return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
4041 case MONO_TYPE_ARRAY:
4042 return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
4043 case MONO_TYPE_GENERICINST:
4044 return ((hash << 5) - hash) ^ mono_generic_class_hash (t1->data.generic_class);
4045 }
4046 return hash;
4047 }
4048
4049 static gboolean
4050 mono_metadata_generic_param_equal (MonoGenericParam *p1, MonoGenericParam *p2, gboolean signature_only)
4051 {
4052 if (p1 == p2)
4053 return TRUE;
4054 if (mono_generic_param_num (p1) != mono_generic_param_num (p2))
4055 return FALSE;
4056
4057 /*
4058 * We have to compare the image as well because if we didn't,
4059 * the generic_inst_cache lookup wouldn't care about the image
4060 * of generic params, so what could happen is that a generic
4061 * inst with params from image A is put into the cache, then
4062 * image B gets that generic inst from the cache, image A is
4063 * unloaded, so the inst is deleted, but image B still retains
4064 * a pointer to it.
4065 *
4066 * The AOT runtime doesn't set the image when it's decoding
4067 * types, so we only compare it when the owner is NULL.
4068 */
4069 if (mono_generic_param_owner (p1) == mono_generic_param_owner (p2) &&
4070 (mono_generic_param_owner (p1) || p1->image == p2->image))
4071 return TRUE;
4072
4073 /*
4074 * If `signature_only' is true, we're comparing two (method) signatures.
4075 * In this case, the owner of two type parameters doesn't need to match.
4076 */
4077
4078 return signature_only;
4079 }
4080
4081 static gboolean
4082 mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only)
4083 {
4084 if (c1 == c2)
4085 return TRUE;
4086 if (c1->generic_class && c2->generic_class)
4087 return _mono_metadata_generic_class_equal (c1->generic_class, c2->generic_class, signature_only);
4088 if (c1->generic_class && c2->generic_container)
4089 return _mono_metadata_generic_class_container_equal (c1->generic_class, c2, signature_only);
4090 if (c1->generic_container && c2->generic_class)
4091 return _mono_metadata_generic_class_container_equal (c2->generic_class, c1, signature_only);
4092 if ((c1->byval_arg.type == MONO_TYPE_VAR) && (c2->byval_arg.type == MONO_TYPE_VAR))
4093 return mono_metadata_generic_param_equal (
4094 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4095 if ((c1->byval_arg.type == MONO_TYPE_MVAR) && (c2->byval_arg.type == MONO_TYPE_MVAR))
4096 return mono_metadata_generic_param_equal (
4097 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4098 if (signature_only &&
4099 (c1->byval_arg.type == MONO_TYPE_SZARRAY) && (c2->byval_arg.type == MONO_TYPE_SZARRAY))
4100 return mono_metadata_class_equal (c1->byval_arg.data.klass, c2->byval_arg.data.klass, signature_only);
4101 return FALSE;
4102 }
4103
4104 static gboolean
4105 mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only)
4106 {
4107 gpointer iter1 = 0, iter2 = 0;
4108
4109 if (s1 == s2)
4110 return TRUE;
4111 if (s1->call_convention != s2->call_convention)
4112 return FALSE;
4113 if (s1->sentinelpos != s2->sentinelpos)
4114 return FALSE;
4115 if (s1->hasthis != s2->hasthis)
4116 return FALSE;
4117 if (s1->explicit_this != s2->explicit_this)
4118 return FALSE;
4119 if (! do_mono_metadata_type_equal (s1->ret, s2->ret, signature_only))
4120 return FALSE;
4121 if (s1->param_count != s2->param_count)
4122 return FALSE;
4123
4124 while (TRUE) {
4125 MonoType *t1 = mono_signature_get_params (s1, &iter1);
4126 MonoType *t2 = mono_signature_get_params (s2, &iter2);
4127
4128 if (t1 == NULL || t2 == NULL)
4129 return (t1 == t2);
4130 if (! do_mono_metadata_type_equal (t1, t2, signature_only))
4131 return FALSE;
4132 }
4133 }
4134
4135 /*
4136 * mono_metadata_type_equal:
4137 * @t1: a type
4138 * @t2: another type
4139 *
4140 * Determine if @t1 and @t2 represent the same type.
4141 * Returns: #TRUE if @t1 and @t2 are equal.
4142 */
4143 static gboolean
4144 do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only)
4145 {
4146 if (t1->type != t2->type || t1->byref != t2->byref)
4147 return FALSE;
4148
4149 switch (t1->type) {
4150 case MONO_TYPE_VOID:
4151 case MONO_TYPE_BOOLEAN:
4152 case MONO_TYPE_CHAR:
4153 case MONO_TYPE_I1:
4154 case MONO_TYPE_U1:
4155 case MONO_TYPE_I2:
4156 case MONO_TYPE_U2:
4157 case MONO_TYPE_I4:
4158 case MONO_TYPE_U4:
4159 case MONO_TYPE_I8:
4160 case MONO_TYPE_U8:
4161 case MONO_TYPE_R4:
4162 case MONO_TYPE_R8:
4163 case MONO_TYPE_STRING:
4164 case MONO_TYPE_I:
4165 case MONO_TYPE_U:
4166 case MONO_TYPE_OBJECT:
4167 case MONO_TYPE_TYPEDBYREF:
4168 return TRUE;
4169 case MONO_TYPE_VALUETYPE:
4170 case MONO_TYPE_CLASS:
4171 case MONO_TYPE_SZARRAY:
4172 return mono_metadata_class_equal (t1->data.klass, t2->data.klass, signature_only);
4173 case MONO_TYPE_PTR:
4174 return do_mono_metadata_type_equal (t1->data.type, t2->data.type, signature_only);
4175 case MONO_TYPE_ARRAY:
4176 if (t1->data.array->rank != t2->data.array->rank)
4177 return FALSE;
4178 return mono_metadata_class_equal (t1->data.array->eklass, t2->data.array->eklass, signature_only);
4179 case MONO_TYPE_GENERICINST:
4180 return _mono_metadata_generic_class_equal (
4181 t1->data.generic_class, t2->data.generic_class, signature_only);
4182 case MONO_TYPE_VAR:
4183 return mono_metadata_generic_param_equal (
4184 t1->data.generic_param, t2->data.generic_param, signature_only);
4185 case MONO_TYPE_MVAR:
4186 return mono_metadata_generic_param_equal (
4187 t1->data.generic_param, t2->data.generic_param, signature_only);
4188 case MONO_TYPE_FNPTR:
4189 return mono_metadata_fnptr_equal (t1->data.method, t2->data.method, signature_only);
4190 default:
4191 g_error ("implement type compare for %0x!", t1->type);
4192 return FALSE;
4193 }
4194
4195 return FALSE;
4196 }
4197
4198 gboolean
4199 mono_metadata_type_equal (MonoType *t1, MonoType *t2)
4200 {
4201 return do_mono_metadata_type_equal (t1, t2, FALSE);
4202 }
4203
4204 /**
4205 * mono_metadata_type_equal_full:
4206 * @t1: a type
4207 * @t2: another type
4208 * @signature_only: if signature only comparison should be made
4209 *
4210 * Determine if @t1 and @t2 are signature compatible if @signature_only is #TRUE, otherwise
4211 * behaves the same way as mono_metadata_type_equal.
4212 * The function mono_metadata_type_equal(a, b) is just a shortcut for mono_metadata_type_equal_full(a, b, FALSE).
4213 * Returns: #TRUE if @t1 and @t2 are equal taking @signature_only into account.
4214 */
4215 gboolean
4216 mono_metadata_type_equal_full (MonoType *t1, MonoType *t2, gboolean signature_only)
4217 {
4218 return do_mono_metadata_type_equal (t1, t2, signature_only);
4219 }
4220
4221 /**
4222 * mono_metadata_signature_equal:
4223 * @sig1: a signature
4224 * @sig2: another signature
4225 *
4226 * Determine if @sig1 and @sig2 represent the same signature, with the
4227 * same number of arguments and the same types.
4228 * Returns: #TRUE if @sig1 and @sig2 are equal.
4229 */
4230 gboolean
4231 mono_metadata_signature_equal (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
4232 {
4233 int i;
4234
4235 if (sig1->hasthis != sig2->hasthis || sig1->param_count != sig2->param_count)
4236 return FALSE;
4237
4238 if (sig1->generic_param_count != sig2->generic_param_count)
4239 return FALSE;
4240
4241 /*
4242 * We're just comparing the signatures of two methods here:
4243 *
4244 * If we have two generic methods `void Foo<U> (U u)' and `void Bar<V> (V v)',
4245 * U and V are equal here.
4246 *
4247 * That's what the `signature_only' argument of do_mono_metadata_type_equal() is for.
4248 */
4249
4250 for (i = 0; i < sig1->param_count; i++) {
4251 MonoType *p1 = sig1->params[i];
4252 MonoType *p2 = sig2->params[i];
4253
4254 /* if (p1->attrs != p2->attrs)
4255 return FALSE;
4256 */
4257 if (!do_mono_metadata_type_equal (p1, p2, TRUE))
4258 return FALSE;
4259 }
4260
4261 if (!do_mono_metadata_type_equal (sig1->ret, sig2->ret, TRUE))
4262 return FALSE;
4263 return TRUE;
4264 }
4265
4266 /**
4267 * mono_metadata_type_dup:
4268 * @image: image to alloc memory from
4269 * @original: type to duplicate
4270 *
4271 * Returns: copy of type allocated from the image's mempool (or from the heap, if @image is null).
4272 */
4273 MonoType *
4274 mono_metadata_type_dup (MonoImage *image, const MonoType *o)
4275 {
4276 MonoType *r = NULL;
4277 int sizeof_o = MONO_SIZEOF_TYPE;
4278 if (o->num_mods)
4279 sizeof_o += o->num_mods * sizeof (MonoCustomMod);
4280
4281 r = image ? mono_image_alloc0 (image, sizeof_o) : g_malloc (sizeof_o);
4282
4283 memcpy (r, o, sizeof_o);
4284
4285 if (o->type == MONO_TYPE_PTR) {
4286 r->data.type = mono_metadata_type_dup (image, o->data.type);
4287 } else if (o->type == MONO_TYPE_ARRAY) {
4288 r->data.array = mono_dup_array_type (image, o->data.array);
4289 } else if (o->type == MONO_TYPE_FNPTR) {
4290 /*FIXME the dup'ed signature is leaked mono_metadata_free_type*/
4291 r->data.method = mono_metadata_signature_deep_dup (image, o->data.method);
4292 }
4293 return r;
4294 }
4295
4296 guint
4297 mono_signature_hash (MonoMethodSignature *sig)
4298 {
4299 guint i, res = sig->ret->type;
4300
4301 for (i = 0; i < sig->param_count; i++)
4302 res = (res << 5) - res + mono_type_hash (sig->params[i]);
4303
4304 return res;
4305 }
4306
4307 /*
4308 * mono_metadata_encode_value:
4309 * @value: value to encode
4310 * @buf: buffer where to write the compressed representation
4311 * @endbuf: pointer updated to point at the end of the encoded output
4312 *
4313 * Encodes the value @value in the compressed representation used
4314 * in metadata and stores the result in @buf. @buf needs to be big
4315 * enough to hold the data (4 bytes).
4316 */
4317 void
4318 mono_metadata_encode_value (guint32 value, char *buf, char **endbuf)
4319 {
4320 char *p = buf;
4321
4322 if (value < 0x80)
4323 *p++ = value;
4324 else if (value < 0x4000) {
4325 p [0] = 0x80 | (value >> 8);
4326 p [1] = value & 0xff;
4327 p += 2;
4328 } else {
4329 p [0] = (value >> 24) | 0xc0;
4330 p [1] = (value >> 16) & 0xff;
4331 p [2] = (value >> 8) & 0xff;
4332 p [3] = value & 0xff;
4333 p += 4;
4334 }
4335 if (endbuf)
4336 *endbuf = p;
4337 }
4338
4339 /*
4340 * mono_metadata_field_info:
4341 * @meta: the Image the field is defined in
4342 * @index: the index in the field table representing the field
4343 * @offset: a pointer to an integer where to store the offset that
4344 * may have been specified for the field in a FieldLayout table
4345 * @rva: a pointer to the RVA of the field data in the image that
4346 * may have been defined in a FieldRVA table
4347 * @marshal_spec: a pointer to the marshal spec that may have been
4348 * defined for the field in a FieldMarshal table.
4349 *
4350 * Gather info for field @index that may have been defined in the FieldLayout,
4351 * FieldRVA and FieldMarshal tables.
4352 * Either of offset, rva and marshal_spec can be NULL if you're not interested
4353 * in the data.
4354 */
4355 void
4356 mono_metadata_field_info (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
4357 MonoMarshalSpec **marshal_spec)
4358 {
4359 mono_metadata_field_info_full (meta, index, offset, rva, marshal_spec, FALSE);
4360 }
4361
4362 void
4363 mono_metadata_field_info_with_mempool (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
4364 MonoMarshalSpec **marshal_spec)
4365 {
4366 mono_metadata_field_info_full (meta, index, offset, rva, marshal_spec, TRUE);
4367 }
4368
4369 static void
4370 mono_metadata_field_info_full (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
4371 MonoMarshalSpec **marshal_spec, gboolean alloc_from_image)
4372 {
4373 MonoTableInfo *tdef;
4374 locator_t loc;
4375
4376 loc.idx = index + 1;
4377 if (meta->uncompressed_metadata)
4378 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
4379
4380 if (offset) {
4381 tdef = &meta->tables [MONO_TABLE_FIELDLAYOUT];
4382
4383 loc.col_idx = MONO_FIELD_LAYOUT_FIELD;
4384 loc.t = tdef;
4385
4386 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
4387 *offset = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_LAYOUT_OFFSET);
4388 } else {
4389 *offset = (guint32)-1;
4390 }
4391 }
4392 if (rva) {
4393 tdef = &meta->tables [MONO_TABLE_FIELDRVA];
4394
4395 loc.col_idx = MONO_FIELD_RVA_FIELD;
4396 loc.t = tdef;
4397
4398 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
4399 /*
4400 * LAMESPEC: There is no signature, no nothing, just the raw data.
4401 */
4402 *rva = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_RVA_RVA);
4403 } else {
4404 *rva = 0;
4405 }
4406 }
4407 if (marshal_spec) {
4408 const char *p;
4409
4410 if ((p = mono_metadata_get_marshal_info (meta, index, TRUE))) {
4411 *marshal_spec = mono_metadata_parse_marshal_spec_full (alloc_from_image ? meta : NULL, p);
4412 }
4413 }
4414
4415 }
4416
4417 /*
4418 * mono_metadata_get_constant_index:
4419 * @meta: the Image the field is defined in
4420 * @index: the token that may have a row defined in the constants table
4421 * @hint: possible position for the row
4422 *
4423 * @token must be a FieldDef, ParamDef or PropertyDef token.
4424 *
4425 * Returns: the index into the Constants table or 0 if not found.
4426 */
4427 guint32
4428 mono_metadata_get_constant_index (MonoImage *meta, guint32 token, guint32 hint)
4429 {
4430 MonoTableInfo *tdef;
4431 locator_t loc;
4432 guint32 index = mono_metadata_token_index (token);
4433
4434 tdef = &meta->tables [MONO_TABLE_CONSTANT];
4435 index <<= MONO_HASCONSTANT_BITS;
4436 switch (mono_metadata_token_table (token)) {
4437 case MONO_TABLE_FIELD:
4438 index |= MONO_HASCONSTANT_FIEDDEF;
4439 break;
4440 case MONO_TABLE_PARAM:
4441 index |= MONO_HASCONSTANT_PARAM;
4442 break;
4443 case MONO_TABLE_PROPERTY:
4444 index |= MONO_HASCONSTANT_PROPERTY;
4445 break;
4446 default:
4447 g_warning ("Not a valid token for the constant table: 0x%08x", token);
4448 return 0;
4449 }
4450 loc.idx = index;
4451 loc.col_idx = MONO_CONSTANT_PARENT;
4452 loc.t = tdef;
4453
4454 /* FIXME: Index translation */
4455
4456 if ((hint > 0) && (hint < tdef->rows) && (mono_metadata_decode_row_col (tdef, hint - 1, MONO_CONSTANT_PARENT) == index))
4457 return hint;
4458
4459 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
4460 return loc.result + 1;
4461 }
4462 return 0;
4463 }
4464
4465 /*
4466 * mono_metadata_events_from_typedef:
4467 * @meta: metadata context
4468 * @index: 0-based index (in the TypeDef table) describing a type
4469 *
4470 * Returns: the 0-based index in the Event table for the events in the
4471 * type. The last event that belongs to the type (plus 1) is stored
4472 * in the @end_idx pointer.
4473 */
4474 guint32
4475 mono_metadata_events_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
4476 {
4477 locator_t loc;
4478 guint32 start, end;
4479 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_EVENTMAP];
4480
4481 *end_idx = 0;
4482
4483 if (!tdef->base)
4484 return 0;
4485
4486 loc.t = tdef;
4487 loc.col_idx = MONO_EVENT_MAP_PARENT;
4488 loc.idx = index + 1;
4489
4490 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4491 return 0;
4492
4493 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_EVENT_MAP_EVENTLIST);
4494 if (loc.result + 1 < tdef->rows) {
4495 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_EVENT_MAP_EVENTLIST) - 1;
4496 } else {
4497 end = meta->tables [MONO_TABLE_EVENT].rows;
4498 }
4499
4500 *end_idx = end;
4501 return start - 1;
4502 }
4503
4504 /*
4505 * mono_metadata_methods_from_event:
4506 * @meta: metadata context
4507 * @index: 0-based index (in the Event table) describing a event
4508 *
4509 * Returns: the 0-based index in the MethodDef table for the methods in the
4510 * event. The last method that belongs to the event (plus 1) is stored
4511 * in the @end_idx pointer.
4512 */
4513 guint32
4514 mono_metadata_methods_from_event (MonoImage *meta, guint32 index, guint *end_idx)
4515 {
4516 locator_t loc;
4517 guint start, end;
4518 guint32 cols [MONO_METHOD_SEMA_SIZE];
4519 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
4520
4521 *end_idx = 0;
4522 if (!msemt->base)
4523 return 0;
4524
4525 if (meta->uncompressed_metadata)
4526 index = search_ptr_table (meta, MONO_TABLE_EVENT_POINTER, index + 1) - 1;
4527
4528 loc.t = msemt;
4529 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
4530 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_EVENT; /* Method association coded index */
4531
4532 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
4533 return 0;
4534
4535 start = loc.result;
4536 /*
4537 * We may end up in the middle of the rows...
4538 */
4539 while (start > 0) {
4540 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
4541 start--;
4542 else
4543 break;
4544 }
4545 end = start + 1;
4546 while (end < msemt->rows) {
4547 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
4548 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
4549 break;
4550 ++end;
4551 }
4552 *end_idx = end;
4553 return start;
4554 }
4555
4556 /*
4557 * mono_metadata_properties_from_typedef:
4558 * @meta: metadata context
4559 * @index: 0-based index (in the TypeDef table) describing a type
4560 *
4561 * Returns: the 0-based index in the Property table for the properties in the
4562 * type. The last property that belongs to the type (plus 1) is stored
4563 * in the @end_idx pointer.
4564 */
4565 guint32
4566 mono_metadata_properties_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
4567 {
4568 locator_t loc;
4569 guint32 start, end;
4570 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_PROPERTYMAP];
4571
4572 *end_idx = 0;
4573
4574 if (!tdef->base)
4575 return 0;
4576
4577 loc.t = tdef;
4578 loc.col_idx = MONO_PROPERTY_MAP_PARENT;
4579 loc.idx = index + 1;
4580
4581 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4582 return 0;
4583
4584 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_PROPERTY_MAP_PROPERTY_LIST);
4585 if (loc.result + 1 < tdef->rows) {
4586 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_PROPERTY_MAP_PROPERTY_LIST) - 1;
4587 } else {
4588 end = meta->tables [MONO_TABLE_PROPERTY].rows;
4589 }
4590
4591 *end_idx = end;
4592 return start - 1;
4593 }
4594
4595 /*
4596 * mono_metadata_methods_from_property:
4597 * @meta: metadata context
4598 * @index: 0-based index (in the PropertyDef table) describing a property
4599 *
4600 * Returns: the 0-based index in the MethodDef table for the methods in the
4601 * property. The last method that belongs to the property (plus 1) is stored
4602 * in the @end_idx pointer.
4603 */
4604 guint32
4605 mono_metadata_methods_from_property (MonoImage *meta, guint32 index, guint *end_idx)
4606 {
4607 locator_t loc;
4608 guint start, end;
4609 guint32 cols [MONO_METHOD_SEMA_SIZE];
4610 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
4611
4612 *end_idx = 0;
4613 if (!msemt->base)
4614 return 0;
4615
4616 if (meta->uncompressed_metadata)
4617 index = search_ptr_table (meta, MONO_TABLE_PROPERTY_POINTER, index + 1) - 1;
4618
4619 loc.t = msemt;
4620 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
4621 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_PROPERTY; /* Method association coded index */
4622
4623 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
4624 return 0;
4625
4626 start = loc.result;
4627 /*
4628 * We may end up in the middle of the rows...
4629 */
4630 while (start > 0) {
4631 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
4632 start--;
4633 else
4634 break;
4635 }
4636 end = start + 1;
4637 while (end < msemt->rows) {
4638 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
4639 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
4640 break;
4641 ++end;
4642 }
4643 *end_idx = end;
4644 return start;
4645 }
4646
4647 guint32
4648 mono_metadata_implmap_from_method (MonoImage *meta, guint32 method_idx)
4649 {
4650 locator_t loc;
4651 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_IMPLMAP];
4652
4653 if (!tdef->base)
4654 return 0;
4655
4656 /* No index translation seems to be needed */
4657
4658 loc.t = tdef;
4659 loc.col_idx = MONO_IMPLMAP_MEMBER;
4660 loc.idx = ((method_idx + 1) << MONO_MEMBERFORWD_BITS) | MONO_MEMBERFORWD_METHODDEF;
4661
4662 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4663 return 0;
4664
4665 return loc.result + 1;
4666 }
4667
4668 /**
4669 * @image: context where the image is created
4670 * @type_spec: typespec token
4671 *
4672 * Creates a MonoType representing the TypeSpec indexed by the @type_spec
4673 * token.
4674 */
4675 MonoType *
4676 mono_type_create_from_typespec (MonoImage *image, guint32 type_spec)
4677 {
4678 guint32 idx = mono_metadata_token_index (type_spec);
4679 MonoTableInfo *t;
4680 guint32 cols [MONO_TYPESPEC_SIZE];
4681 const char *ptr;
4682 guint32 len;
4683 MonoType *type, *type2;
4684 MonoType stack_type;
4685
4686 mono_loader_lock ();
4687
4688 type = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4689 if (type) {
4690 mono_loader_unlock ();
4691 return type;
4692 }
4693
4694 t = &image->tables [MONO_TABLE_TYPESPEC];
4695
4696 mono_metadata_decode_row (t, idx-1, cols, MONO_TYPESPEC_SIZE);
4697 ptr = mono_metadata_blob_heap (image, cols [MONO_TYPESPEC_SIGNATURE]);
4698
4699 if (!mono_verifier_verify_typespec_signature (image, cols [MONO_TYPESPEC_SIGNATURE], NULL)) {
4700 mono_loader_unlock ();
4701 return NULL;
4702 }
4703
4704 len = mono_metadata_decode_value (ptr, &ptr);
4705
4706 type = &stack_type;
4707 memset (type, 0, MONO_SIZEOF_TYPE);
4708
4709 if (*ptr == MONO_TYPE_BYREF) {
4710 type->byref = 1;
4711 ptr++;
4712 }
4713
4714 if (!do_mono_metadata_parse_type (type, image, NULL, ptr, &ptr)) {
4715 mono_loader_unlock ();
4716 return NULL;
4717 }
4718
4719 type2 = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4720
4721 if (type2) {
4722 mono_loader_unlock ();
4723 return type2;
4724 }
4725
4726 type2 = mono_image_alloc (image, MONO_SIZEOF_TYPE);
4727 memcpy (type2, type, MONO_SIZEOF_TYPE);
4728 g_hash_table_insert (image->typespec_cache, GUINT_TO_POINTER (type_spec), type2);
4729
4730 mono_loader_unlock ();
4731
4732 return type2;
4733 }
4734
4735
4736 static char*
4737 mono_image_strndup (MonoImage *image, const char *data, guint len)
4738 {
4739 char *res;
4740 if (!image)
4741 return g_strndup (data, len);
4742 res = mono_image_alloc (image, len + 1);
4743 memcpy (res, data, len);
4744 res [len] = 0;
4745 return res;
4746 }
4747
4748 MonoMarshalSpec *
4749 mono_metadata_parse_marshal_spec (MonoImage *image, const char *ptr)
4750 {
4751 return mono_metadata_parse_marshal_spec_full (NULL, ptr);
4752 }
4753
4754 MonoMarshalSpec *
4755 mono_metadata_parse_marshal_spec_full (MonoImage *image, const char *ptr)
4756 {
4757 MonoMarshalSpec *res;
4758 int len;
4759 const char *start = ptr;
4760
4761 /* fixme: this is incomplete, but I cant find more infos in the specs */
4762
4763 if (image)
4764 res = mono_image_alloc0 (image, sizeof (MonoMarshalSpec));
4765 else
4766 res = g_new0 (MonoMarshalSpec, 1);
4767
4768 len = mono_metadata_decode_value (ptr, &ptr);
4769 res->native = *ptr++;
4770
4771 if (res->native == MONO_NATIVE_LPARRAY) {
4772 res->data.array_data.param_num = -1;
4773 res->data.array_data.num_elem = -1;
4774 res->data.array_data.elem_mult = -1;
4775
4776 if (ptr - start <= len)
4777 res->data.array_data.elem_type = *ptr++;
4778 if (ptr - start <= len)
4779 res->data.array_data.param_num = mono_metadata_decode_value (ptr, &ptr);
4780 if (ptr - start <= len)
4781 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4782 if (ptr - start <= len) {
4783 /*
4784 * LAMESPEC: Older spec versions say this parameter comes before
4785 * num_elem. Never spec versions don't talk about elem_mult at
4786 * all, but csc still emits it, and it is used to distinguish
4787 * between param_num being 0, and param_num being omitted.
4788 * So if (param_num == 0) && (num_elem > 0), then
4789 * elem_mult == 0 -> the array size is num_elem
4790 * elem_mult == 1 -> the array size is @param_num + num_elem
4791 */
4792 res->data.array_data.elem_mult = mono_metadata_decode_value (ptr, &ptr);
4793 }
4794 }
4795
4796 if (res->native == MONO_NATIVE_BYVALTSTR) {
4797 if (ptr - start <= len)
4798 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4799 }
4800
4801 if (res->native == MONO_NATIVE_BYVALARRAY) {
4802 if (ptr - start <= len)
4803 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4804 }
4805
4806 if (res->native == MONO_NATIVE_CUSTOM) {
4807 /* skip unused type guid */
4808 len = mono_metadata_decode_value (ptr, &ptr);
4809 ptr += len;
4810 /* skip unused native type name */
4811 len = mono_metadata_decode_value (ptr, &ptr);
4812 ptr += len;
4813 /* read custom marshaler type name */
4814 len = mono_metadata_decode_value (ptr, &ptr);
4815 res->data.custom_data.custom_name = mono_image_strndup (image, ptr, len);
4816 ptr += len;
4817 /* read cookie string */
4818 len = mono_metadata_decode_value (ptr, &ptr);
4819 res->data.custom_data.cookie = mono_image_strndup (image, ptr, len);
4820 }
4821
4822 if (res->native == MONO_NATIVE_SAFEARRAY) {
4823 res->data.safearray_data.elem_type = 0;
4824 res->data.safearray_data.num_elem = 0;
4825 if (ptr - start <= len)
4826 res->data.safearray_data.elem_type = *ptr++;
4827 if (ptr - start <= len)
4828 res->data.safearray_data.num_elem = *ptr++;
4829 }
4830 return res;
4831 }
4832
4833 void
4834 mono_metadata_free_marshal_spec (MonoMarshalSpec *spec)
4835 {
4836 if (spec->native == MONO_NATIVE_CUSTOM) {
4837 g_free (spec->data.custom_data.custom_name);
4838 g_free (spec->data.custom_data.cookie);
4839 }
4840 g_free (spec);
4841 }
4842
4843 /**
4844 * mono_type_to_unmanaged:
4845 *
4846 * Returns: A MonoMarshalNative enumeration value (MONO_NATIVE_) value
4847 * describing the underlying native reprensetation of the type.
4848 *
4849 * In addition the value pointed by
4850 * "conv" will contain the kind of marshalling required for this
4851 * particular type one of the MONO_MARSHAL_CONV_ enumeration values.
4852 */
4853 guint32
4854 mono_type_to_unmanaged (MonoType *type, MonoMarshalSpec *mspec, gboolean as_field,
4855 gboolean unicode, MonoMarshalConv *conv)
4856 {
4857 MonoMarshalConv dummy_conv;
4858 int t = type->type;
4859
4860 if (!conv)
4861 conv = &dummy_conv;
4862
4863 *conv = MONO_MARSHAL_CONV_NONE;
4864
4865 if (type->byref)
4866 return MONO_NATIVE_UINT;
4867
4868 handle_enum:
4869 switch (t) {
4870 case MONO_TYPE_BOOLEAN:
4871 if (mspec) {
4872 switch (mspec->native) {
4873 case MONO_NATIVE_VARIANTBOOL:
4874 *conv = MONO_MARSHAL_CONV_BOOL_VARIANTBOOL;
4875 return MONO_NATIVE_VARIANTBOOL;
4876 case MONO_NATIVE_BOOLEAN:
4877 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4878 return MONO_NATIVE_BOOLEAN;
4879 case MONO_NATIVE_I1:
4880 case MONO_NATIVE_U1:
4881 return mspec->native;
4882 default:
4883 g_error ("cant marshal bool to native type %02x", mspec->native);
4884 }
4885 }
4886 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4887 return MONO_NATIVE_BOOLEAN;
4888 case MONO_TYPE_CHAR: return MONO_NATIVE_U2;
4889 case MONO_TYPE_I1: return MONO_NATIVE_I1;
4890 case MONO_TYPE_U1: return MONO_NATIVE_U1;
4891 case MONO_TYPE_I2: return MONO_NATIVE_I2;
4892 case MONO_TYPE_U2: return MONO_NATIVE_U2;
4893 case MONO_TYPE_I4: return MONO_NATIVE_I4;
4894 case MONO_TYPE_U4: return MONO_NATIVE_U4;
4895 case MONO_TYPE_I8: return MONO_NATIVE_I8;
4896 case MONO_TYPE_U8: return MONO_NATIVE_U8;
4897 case MONO_TYPE_R4: return MONO_NATIVE_R4;
4898 case MONO_TYPE_R8: return MONO_NATIVE_R8;
4899 case MONO_TYPE_STRING:
4900 if (mspec) {
4901 switch (mspec->native) {
4902 case MONO_NATIVE_BSTR:
4903 *conv = MONO_MARSHAL_CONV_STR_BSTR;
4904 return MONO_NATIVE_BSTR;
4905 case MONO_NATIVE_LPSTR:
4906 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
4907 return MONO_NATIVE_LPSTR;
4908 case MONO_NATIVE_LPWSTR:
4909 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
4910 return MONO_NATIVE_LPWSTR;
4911 case MONO_NATIVE_LPTSTR:
4912 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
4913 return MONO_NATIVE_LPTSTR;
4914 case MONO_NATIVE_ANSIBSTR:
4915 *conv = MONO_MARSHAL_CONV_STR_ANSIBSTR;
4916 return MONO_NATIVE_ANSIBSTR;
4917 case MONO_NATIVE_TBSTR:
4918 *conv = MONO_MARSHAL_CONV_STR_TBSTR;
4919 return MONO_NATIVE_TBSTR;
4920 case MONO_NATIVE_BYVALTSTR:
4921 if (unicode)
4922 *conv = MONO_MARSHAL_CONV_STR_BYVALWSTR;
4923 else
4924 *conv = MONO_MARSHAL_CONV_STR_BYVALSTR;
4925 return MONO_NATIVE_BYVALTSTR;
4926 default:
4927 g_error ("Can not marshal string to native type '%02x': Invalid managed/unmanaged type combination (String fields must be paired with LPStr, LPWStr, BStr or ByValTStr).", mspec->native);
4928 }
4929 }
4930 if (unicode) {
4931 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
4932 return MONO_NATIVE_LPWSTR;
4933 }
4934 else {
4935 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
4936 return MONO_NATIVE_LPSTR;
4937 }
4938 case MONO_TYPE_PTR: return MONO_NATIVE_UINT;
4939 case MONO_TYPE_VALUETYPE: /*FIXME*/
4940 if (type->data.klass->enumtype) {
4941 t = mono_class_enum_basetype (type->data.klass)->type;
4942 goto handle_enum;
4943 }
4944 if (type->data.klass == mono_defaults.handleref_class){
4945 *conv = MONO_MARSHAL_CONV_HANDLEREF;
4946 return MONO_NATIVE_INT;
4947 }
4948 return MONO_NATIVE_STRUCT;
4949 case MONO_TYPE_SZARRAY:
4950 case MONO_TYPE_ARRAY:
4951 if (mspec) {
4952 switch (mspec->native) {
4953 case MONO_NATIVE_BYVALARRAY:
4954 if ((type->data.klass->element_class == mono_defaults.char_class) && !unicode)
4955 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALCHARARRAY;
4956 else
4957 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALARRAY;
4958 return MONO_NATIVE_BYVALARRAY;
4959 case MONO_NATIVE_SAFEARRAY:
4960 *conv = MONO_MARSHAL_CONV_ARRAY_SAVEARRAY;
4961 return MONO_NATIVE_SAFEARRAY;
4962 case MONO_NATIVE_LPARRAY:
4963 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4964 return MONO_NATIVE_LPARRAY;
4965 default:
4966 g_error ("cant marshal array as native type %02x", mspec->native);
4967 }
4968 }
4969
4970 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4971 return MONO_NATIVE_LPARRAY;
4972 case MONO_TYPE_I: return MONO_NATIVE_INT;
4973 case MONO_TYPE_U: return MONO_NATIVE_UINT;
4974 case MONO_TYPE_CLASS:
4975 case MONO_TYPE_OBJECT: {
4976 /* FIXME : we need to handle ArrayList and StringBuilder here, probably */
4977 if (mspec) {
4978 switch (mspec->native) {
4979 case MONO_NATIVE_STRUCT:
4980 return MONO_NATIVE_STRUCT;
4981 case MONO_NATIVE_CUSTOM:
4982 return MONO_NATIVE_CUSTOM;
4983 case MONO_NATIVE_INTERFACE:
4984 *conv = MONO_MARSHAL_CONV_OBJECT_INTERFACE;
4985 return MONO_NATIVE_INTERFACE;
4986 case MONO_NATIVE_IDISPATCH:
4987 *conv = MONO_MARSHAL_CONV_OBJECT_IDISPATCH;
4988 return MONO_NATIVE_IDISPATCH;
4989 case MONO_NATIVE_IUNKNOWN:
4990 *conv = MONO_MARSHAL_CONV_OBJECT_IUNKNOWN;
4991 return MONO_NATIVE_IUNKNOWN;
4992 case MONO_NATIVE_FUNC:
4993 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4994 type->data.klass == mono_defaults.delegate_class ||
4995 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4996 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4997 return MONO_NATIVE_FUNC;
4998 }
4999 /* Fall through */
5000 default:
5001 g_error ("cant marshal object as native type %02x", mspec->native);
5002 }
5003 }
5004 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
5005 type->data.klass == mono_defaults.delegate_class ||
5006 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
5007 *conv = MONO_MARSHAL_CONV_DEL_FTN;
5008 return MONO_NATIVE_FUNC;
5009 }
5010 if (mono_defaults.safehandle_class && type->data.klass == mono_defaults.safehandle_class){
5011 *conv = MONO_MARSHAL_CONV_SAFEHANDLE;
5012 return MONO_NATIVE_INT;
5013 }
5014 *conv = MONO_MARSHAL_CONV_OBJECT_STRUCT;
5015 return MONO_NATIVE_STRUCT;
5016 }
5017 case MONO_TYPE_FNPTR: return MONO_NATIVE_FUNC;
5018 case MONO_TYPE_GENERICINST:
5019 type = &type->data.generic_class->container_class->byval_arg;
5020 t = type->type;
5021 goto handle_enum;
5022 case MONO_TYPE_TYPEDBYREF:
5023 default:
5024 g_error ("type 0x%02x not handled in marshal", t);
5025 }
5026 return MONO_NATIVE_MAX;
5027 }
5028
5029 const char*
5030 mono_metadata_get_marshal_info (MonoImage *meta, guint32 idx, gboolean is_field)
5031 {
5032 locator_t loc;
5033 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_FIELDMARSHAL];
5034
5035 if (!tdef->base)
5036 return NULL;
5037
5038 loc.t = tdef;
5039 loc.col_idx = MONO_FIELD_MARSHAL_PARENT;
5040 loc.idx = ((idx + 1) << MONO_HAS_FIELD_MARSHAL_BITS) | (is_field? MONO_HAS_FIELD_MARSHAL_FIELDSREF: MONO_HAS_FIELD_MARSHAL_PARAMDEF);
5041
5042 /* FIXME: Index translation */
5043
5044 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5045 return NULL;
5046
5047 return mono_metadata_blob_heap (meta, mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_MARSHAL_NATIVE_TYPE));
5048 }
5049
5050 static MonoMethod*
5051 method_from_method_def_or_ref (MonoImage *m, guint32 tok, MonoGenericContext *context)
5052 {
5053 guint32 idx = tok >> MONO_METHODDEFORREF_BITS;
5054
5055 switch (tok & MONO_METHODDEFORREF_MASK) {
5056 case MONO_METHODDEFORREF_METHODDEF:
5057 return mono_get_method_full (m, MONO_TOKEN_METHOD_DEF | idx, NULL, context);
5058 case MONO_METHODDEFORREF_METHODREF:
5059 return mono_get_method_full (m, MONO_TOKEN_MEMBER_REF | idx, NULL, context);
5060 }
5061 g_assert_not_reached ();
5062 return NULL;
5063 }
5064
5065 /*
5066 * mono_class_get_overrides_full:
5067 *
5068 * Return the method overrides belonging to class @type_token in @overrides, and
5069 * the number of overrides in @num_overrides.
5070 *
5071 * Returns: TRUE on success, FALSE on failure.
5072 */
5073 gboolean
5074 mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod ***overrides, gint32 *num_overrides,
5075 MonoGenericContext *generic_context)
5076 {
5077 locator_t loc;
5078 MonoTableInfo *tdef = &image->tables [MONO_TABLE_METHODIMPL];
5079 guint32 start, end;
5080 gint32 i, num;
5081 guint32 cols [MONO_METHODIMPL_SIZE];
5082 MonoMethod **result;
5083 gint32 ok = TRUE;
5084
5085 *overrides = NULL;
5086 if (num_overrides)
5087 *num_overrides = 0;
5088
5089 if (!tdef->base)
5090 return TRUE;
5091
5092 loc.t = tdef;
5093 loc.col_idx = MONO_METHODIMPL_CLASS;
5094 loc.idx = mono_metadata_token_index (type_token);
5095
5096 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5097 return TRUE;
5098
5099 start = loc.result;
5100 end = start + 1;
5101 /*
5102 * We may end up in the middle of the rows...
5103 */
5104 while (start > 0) {
5105 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_METHODIMPL_CLASS))
5106 start--;
5107 else
5108 break;
5109 }
5110 while (end < tdef->rows) {
5111 if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
5112 end++;
5113 else
5114 break;
5115 }
5116 num = end - start;
5117 result = g_new (MonoMethod*, num * 2);
5118 for (i = 0; i < num; ++i) {
5119 MonoMethod *method;
5120
5121 mono_metadata_decode_row (tdef, start + i, cols, MONO_METHODIMPL_SIZE);
5122 method = method_from_method_def_or_ref (
5123 image, cols [MONO_METHODIMPL_DECLARATION], generic_context);
5124 if (method == NULL)
5125 ok = FALSE;
5126 result [i * 2] = method;
5127 method = method_from_method_def_or_ref (
5128 image, cols [MONO_METHODIMPL_BODY], generic_context);
5129 if (method == NULL)
5130 ok = FALSE;
5131 result [i * 2 + 1] = method;
5132 }
5133
5134 *overrides = result;
5135 if (num_overrides)
5136 *num_overrides = num;
5137 return ok;
5138 }
5139
5140 /**
5141 * mono_guid_to_string:
5142 *
5143 * Converts a 16 byte Microsoft GUID to the standard string representation.
5144 */
5145 char *
5146 mono_guid_to_string (const guint8 *guid)
5147 {
5148 return g_strdup_printf ("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
5149 guid[3], guid[2], guid[1], guid[0],
5150 guid[5], guid[4],
5151 guid[7], guid[6],
5152 guid[8], guid[9],
5153 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
5154 }
5155
5156 static gboolean
5157 get_constraints (MonoImage *image, int owner, MonoClass ***constraints, MonoGenericContainer *container)
5158 {
5159 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAMCONSTRAINT];
5160 guint32 cols [MONO_GENPARCONSTRAINT_SIZE];
5161 guint32 i, token, found;
5162 MonoClass *klass, **res;
5163 GSList *cons = NULL, *tmp;
5164 MonoGenericContext *context = &container->context;
5165
5166 *constraints = NULL;
5167 found = 0;
5168 for (i = 0; i < tdef->rows; ++i) {
5169 mono_metadata_decode_row (tdef, i, cols, MONO_GENPARCONSTRAINT_SIZE);
5170 if (cols [MONO_GENPARCONSTRAINT_GENERICPAR] == owner) {
5171 token = mono_metadata_token_from_dor (cols [MONO_GENPARCONSTRAINT_CONSTRAINT]);
5172 klass = mono_class_get_full (image, token, context);
5173 if (!klass) {
5174 g_slist_free (cons);
5175 return FALSE;
5176 }
5177 cons = g_slist_append (cons, klass);
5178 ++found;
5179 } else {
5180 /* contiguous list finished */
5181 if (found)
5182 break;
5183 }
5184 }
5185 if (!found)
5186 return TRUE;
5187 res = g_new0 (MonoClass*, found + 1);
5188 for (i = 0, tmp = cons; i < found; ++i, tmp = tmp->next) {
5189 res [i] = tmp->data;
5190 }
5191 g_slist_free (cons);
5192 *constraints = res;
5193 return TRUE;
5194 }
5195
5196 /*
5197 * mono_metadata_get_generic_param_row:
5198 *
5199 * @image:
5200 * @token: TypeOrMethodDef token, owner for GenericParam
5201 * @owner: coded token, set on return
5202 *
5203 * Returns: 1-based row-id in the GenericParam table whose
5204 * owner is @token. 0 if not found.
5205 */
5206 guint32
5207 mono_metadata_get_generic_param_row (MonoImage *image, guint32 token, guint32 *owner)
5208 {
5209 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
5210 locator_t loc;
5211
5212 g_assert (owner);
5213 if (!tdef->base)
5214 return 0;
5215
5216 if (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
5217 *owner = MONO_TYPEORMETHOD_TYPE;
5218 else if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
5219 *owner = MONO_TYPEORMETHOD_METHOD;
5220 else {
5221 g_error ("wrong token %x to get_generic_param_row", token);
5222 return 0;
5223 }
5224 *owner |= mono_metadata_token_index (token) << MONO_TYPEORMETHOD_BITS;
5225
5226 loc.idx = *owner;
5227 loc.col_idx = MONO_GENERICPARAM_OWNER;
5228 loc.t = tdef;
5229
5230 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5231 return 0;
5232
5233 /* Find the first entry by searching backwards */
5234 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_GENERICPARAM_OWNER) == loc.idx))
5235 loc.result --;
5236
5237 return loc.result + 1;
5238 }
5239
5240 gboolean
5241 mono_metadata_has_generic_params (MonoImage *image, guint32 token)
5242 {
5243 guint32 owner;
5244 return mono_metadata_get_generic_param_row (image, token, &owner);
5245 }
5246
5247 gboolean
5248 mono_metadata_load_generic_param_constraints_full (MonoImage *image, guint32 token,
5249 MonoGenericContainer *container)
5250 {
5251
5252 guint32 start_row, i, owner;
5253 if (! (start_row = mono_metadata_get_generic_param_row (image, token, &owner)))
5254 return TRUE;
5255 for (i = 0; i < container->type_argc; i++) {
5256 if (!get_constraints (image, start_row + i, &mono_generic_container_get_param_info (container, i)->constraints, container))
5257 return FALSE;
5258 }
5259 return TRUE;
5260 }
5261
5262 /*
5263 * mono_metadata_load_generic_param_constraints:
5264 *
5265 * @image: metadata context
5266 * @token: metadata token to load the contraints, can be methodef or typedef.
5267 * @container: generic container to load into.
5268 *
5269 * Load the generic parameter constraints for the newly created generic type or method
5270 * represented by @token and @container. The @container is the new container which has
5271 * been returned by a call to mono_metadata_load_generic_params() with this @token.
5272 */
5273 void
5274 mono_metadata_load_generic_param_constraints (MonoImage *image, guint32 token,
5275 MonoGenericContainer *container)
5276 {
5277 mono_metadata_load_generic_param_constraints_full (image, token, container);
5278 /*FIXME this function can potentially exit with a pending loader error and cause all sort of havok */
5279 }
5280
5281 /*
5282 * mono_metadata_load_generic_params:
5283 *
5284 * Load the type parameters from the type or method definition @token.
5285 *
5286 * Use this method after parsing a type or method definition to figure out whether it's a generic
5287 * type / method. When parsing a method definition, @parent_container points to the generic container
5288 * of the current class, if any.
5289 *
5290 * Note: This method does not load the constraints: for typedefs, this has to be done after fully
5291 * creating the type.
5292 *
5293 * Returns: NULL if @token is not a generic type or method definition or the new generic container.
5294 *
5295 * LOCKING: Acquires the loader lock
5296 *
5297 */
5298 MonoGenericContainer *
5299 mono_metadata_load_generic_params (MonoImage *image, guint32 token, MonoGenericContainer *parent_container)
5300 {
5301 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
5302 guint32 cols [MONO_GENERICPARAM_SIZE];
5303 guint32 i, owner = 0, n;
5304 MonoGenericContainer *container;
5305 MonoGenericParamFull *params;
5306 MonoGenericContext *context;
5307
5308 if (!(i = mono_metadata_get_generic_param_row (image, token, &owner)))
5309 return NULL;
5310 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
5311 params = NULL;
5312 n = 0;
5313 container = mono_image_alloc0 (image, sizeof (MonoGenericContainer));
5314 container->image = image;
5315 do {
5316 n++;
5317 params = g_realloc (params, sizeof (MonoGenericParamFull) * n);
5318 memset (&params [n - 1], 0, sizeof (MonoGenericParamFull));
5319 params [n - 1].param.owner = container;
5320 params [n - 1].param.num = cols [MONO_GENERICPARAM_NUMBER];
5321 params [n - 1].info.token = i | MONO_TOKEN_GENERIC_PARAM;
5322 params [n - 1].info.flags = cols [MONO_GENERICPARAM_FLAGS];
5323 params [n - 1].info.name = mono_metadata_string_heap (image, cols [MONO_GENERICPARAM_NAME]);
5324 if (params [n - 1].param.num != n - 1)
5325 g_warning ("GenericParam table unsorted or hole in generic param sequence: token %d", i);
5326 if (++i > tdef->rows)
5327 break;
5328 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
5329 } while (cols [MONO_GENERICPARAM_OWNER] == owner);
5330
5331 container->type_argc = n;
5332 container->type_params = mono_image_alloc0 (image, sizeof (MonoGenericParamFull) * n);
5333 memcpy (container->type_params, params, sizeof (MonoGenericParamFull) * n);
5334 g_free (params);
5335 container->parent = parent_container;
5336
5337 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
5338 container->is_method = 1;
5339
5340 g_assert (container->parent == NULL || container->is_method);
5341
5342 context = &container->context;
5343 if (container->is_method) {
5344 context->class_inst = container->parent ? container->parent->context.class_inst : NULL;
5345 context->method_inst = mono_get_shared_generic_inst (container);
5346 } else {
5347 context->class_inst = mono_get_shared_generic_inst (container);
5348 }
5349
5350 return container;
5351 }
5352
5353 MonoGenericInst *
5354 mono_get_shared_generic_inst (MonoGenericContainer *container)
5355 {
5356 MonoType **type_argv;
5357 MonoType *helper;
5358 MonoGenericInst *nginst;
5359 int i;
5360
5361 type_argv = g_new0 (MonoType *, container->type_argc);
5362 helper = g_new0 (MonoType, container->type_argc);
5363
5364 for (i = 0; i < container->type_argc; i++) {
5365 MonoType *t = &helper [i];
5366
5367 t->type = container->is_method ? MONO_TYPE_MVAR : MONO_TYPE_VAR;
5368 t->data.generic_param = mono_generic_container_get_param (container, i);
5369
5370 type_argv [i] = t;
5371 }
5372
5373 nginst = mono_metadata_get_generic_inst (container->type_argc, type_argv);
5374
5375 g_free (type_argv);
5376 g_free (helper);
5377
5378 return nginst;
5379 }
5380
5381 /**
5382 * mono_type_is_byref:
5383 * @type: the MonoType operated on
5384 *
5385 * Returns: #TRUE if @type represents a type passed by reference,
5386 * #FALSE otherwise.
5387 */
5388 gboolean
5389 mono_type_is_byref (MonoType *type)
5390 {
5391 return type->byref;
5392 }
5393
5394 /**
5395 * mono_type_get_type:
5396 * @type: the MonoType operated on
5397 *
5398 * Returns: the IL type value for @type. This is one of the MonoTypeEnum
5399 * enum members like MONO_TYPE_I4 or MONO_TYPE_STRING.
5400 */
5401 int
5402 mono_type_get_type (MonoType *type)
5403 {
5404 return type->type;
5405 }
5406
5407 /**
5408 * mono_type_get_signature:
5409 * @type: the MonoType operated on
5410 *
5411 * It is only valid to call this function if @type is a MONO_TYPE_FNPTR.
5412 *
5413 * Returns: the MonoMethodSignature pointer that describes the signature
5414 * of the function pointer @type represents.
5415 */
5416 MonoMethodSignature*
5417 mono_type_get_signature (MonoType *type)
5418 {
5419 g_assert (type->type == MONO_TYPE_FNPTR);
5420 return type->data.method;
5421 }
5422
5423 /**
5424 * mono_type_get_class:
5425 * @type: the MonoType operated on
5426 *
5427 * It is only valid to call this function if @type is a MONO_TYPE_CLASS or a
5428 * MONO_TYPE_VALUETYPE. For more general functionality, use mono_class_from_mono_type (),
5429 * instead
5430 *
5431 * Returns: the MonoClass pointer that describes the class that @type represents.
5432 */
5433 MonoClass*
5434 mono_type_get_class (MonoType *type)
5435 {
5436 /* FIXME: review the runtime users before adding the assert here */
5437 return type->data.klass;
5438 }
5439
5440 /**
5441 * mono_type_get_array_type:
5442 * @type: the MonoType operated on
5443 *
5444 * It is only valid to call this function if @type is a MONO_TYPE_ARRAY.
5445 *
5446 * Returns: a MonoArrayType struct describing the array type that @type
5447 * represents. The info includes details such as rank, array element type
5448 * and the sizes and bounds of multidimensional arrays.
5449 */
5450 MonoArrayType*
5451 mono_type_get_array_type (MonoType *type)
5452 {
5453 return type->data.array;
5454 }
5455
5456 /**
5457 * mono_type_get_ptr_type:
5458 * @type: the MonoType operated on
5459 *
5460 * It is only valid to call this function if @type is a MONO_TYPE_PTR.
5461 * instead
5462 *
5463 * Returns: the MonoType pointer that describes the type that @type
5464 * represents a pointer to.
5465 */
5466 MonoType*
5467 mono_type_get_ptr_type (MonoType *type)
5468 {
5469 g_assert (type->type == MONO_TYPE_PTR);
5470 return type->data.type;
5471 }
5472
5473 MonoClass*
5474 mono_type_get_modifiers (MonoType *type, gboolean *is_required, gpointer *iter)
5475 {
5476 /* FIXME: implement */
5477 return NULL;
5478 }
5479
5480 MonoType*
5481 mono_signature_get_return_type (MonoMethodSignature *sig)
5482 {
5483 return sig->ret;
5484 }
5485
5486 MonoType*
5487 mono_signature_get_params (MonoMethodSignature *sig, gpointer *iter)
5488 {
5489 MonoType** type;
5490 if (!iter)
5491 return NULL;
5492 if (!*iter) {
5493 /* start from the first */
5494 if (sig->param_count) {
5495 *iter = &sig->params [0];
5496 return sig->params [0];
5497 } else {
5498 /* no method */
5499 return NULL;
5500 }
5501 }
5502 type = *iter;
5503 type++;
5504 if (type < &sig->params [sig->param_count]) {
5505 *iter = type;
5506 return *type;
5507 }
5508 return NULL;
5509 }
5510
5511 guint32
5512 mono_signature_get_param_count (MonoMethodSignature *sig)
5513 {
5514 return sig->param_count;
5515 }
5516
5517 guint32
5518 mono_signature_get_call_conv (MonoMethodSignature *sig)
5519 {
5520 return sig->call_convention;
5521 }
5522
5523 int
5524 mono_signature_vararg_start (MonoMethodSignature *sig)
5525 {
5526 return sig->sentinelpos;
5527 }
5528
5529 gboolean
5530 mono_signature_is_instance (MonoMethodSignature *sig)
5531 {
5532 return sig->hasthis;
5533 }
5534
5535 gboolean
5536 mono_signature_explicit_this (MonoMethodSignature *sig)
5537 {
5538 return sig->explicit_this;
5539 }
5540
5541 /* for use with allocated memory blocks (assumes alignment is to 8 bytes) */
5542 guint
5543 mono_aligned_addr_hash (gconstpointer ptr)
5544 {
5545 return GPOINTER_TO_UINT (ptr) >> 3;
5546 }
5547
5548 /*
5549 * If @field belongs to an inflated generic class, return the corresponding field of the
5550 * generic type definition class.
5551 */
5552 MonoClassField*
5553 mono_metadata_get_corresponding_field_from_generic_type_definition (MonoClassField *field)
5554 {
5555 MonoClass *gtd;
5556 int offset;
5557
5558 if (!field->parent->generic_class)
5559 return field;
5560
5561 gtd = field->parent->generic_class->container_class;
5562 offset = field - field->parent->fields;
5563 return gtd->fields + offset;
5564 }
5565
5566 /*
5567 * If @event belongs to an inflated generic class, return the corresponding event of the
5568 * generic type definition class.
5569 */
5570 MonoEvent*
5571 mono_metadata_get_corresponding_event_from_generic_type_definition (MonoEvent *event)
5572 {
5573 MonoClass *gtd;
5574 int offset;
5575
5576 if (!event->parent->generic_class)
5577 return event;
5578
5579 gtd = event->parent->generic_class->container_class;
5580 offset = event - event->parent->ext->events;
5581 return gtd->ext->events + offset;
5582 }
5583
5584 /*
5585 * If @property belongs to an inflated generic class, return the corresponding property of the
5586 * generic type definition class.
5587 */
5588 MonoProperty*
5589 mono_metadata_get_corresponding_property_from_generic_type_definition (MonoProperty *property)
5590 {
5591 MonoClass *gtd;
5592 int offset;
5593
5594 if (!property->parent->generic_class)
5595 return property;
5596
5597 gtd = property->parent->generic_class->container_class;
5598 offset = property - property->parent->ext->properties;
5599 return gtd->ext->properties + offset;
5600 }
5601
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