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update the man page too match last changes
[mono.git] / mono / metadata / metadata.c
blob8f400f1bbef87a55daaba15de24f16fed790d8c3
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 * (C) 2001-2002 Ximian, Inc.
9 */
10
11 #include <config.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <glib.h>
16 #include "metadata.h"
17 #include "tabledefs.h"
18 #include "mono-endian.h"
19 #include "cil-coff.h"
20 #include "tokentype.h"
21 #include "metadata-internals.h"
22 #include "class-internals.h"
23 #include "class.h"
24
25 static gboolean do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
26 const char *ptr, const char **rptr);
27
28 static gboolean do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only);
29 static gboolean mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only);
30 static gboolean mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only);
31 static gboolean _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2,
32 gboolean signature_only);
33
34 /*
35 * This enumeration is used to describe the data types in the metadata
36 * tables
37 */
38 enum {
39 MONO_MT_END,
40
41 /* Sized elements */
42 MONO_MT_UINT32,
43 MONO_MT_UINT16,
44 MONO_MT_UINT8,
45
46 /* Index into Blob heap */
47 MONO_MT_BLOB_IDX,
48
49 /* Index into String heap */
50 MONO_MT_STRING_IDX,
51
52 /* GUID index */
53 MONO_MT_GUID_IDX,
54
55 /* Pointer into a table */
56 MONO_MT_TABLE_IDX,
57
58 /* HasConstant:Parent pointer (Param, Field or Property) */
59 MONO_MT_CONST_IDX,
60
61 /* HasCustomAttribute index. Indexes any table except CustomAttribute */
62 MONO_MT_HASCAT_IDX,
63
64 /* CustomAttributeType encoded index */
65 MONO_MT_CAT_IDX,
66
67 /* HasDeclSecurity index: TypeDef Method or Assembly */
68 MONO_MT_HASDEC_IDX,
69
70 /* Implementation coded index: File, Export AssemblyRef */
71 MONO_MT_IMPL_IDX,
72
73 /* HasFieldMarshal coded index: Field or Param table */
74 MONO_MT_HFM_IDX,
75
76 /* MemberForwardedIndex: Field or Method */
77 MONO_MT_MF_IDX,
78
79 /* TypeDefOrRef coded index: typedef, typeref, typespec */
80 MONO_MT_TDOR_IDX,
81
82 /* MemberRefParent coded index: typeref, moduleref, method, memberref, typesepc, typedef */
83 MONO_MT_MRP_IDX,
84
85 /* MethodDefOrRef coded index: Method or Member Ref table */
86 MONO_MT_MDOR_IDX,
87
88 /* HasSemantic coded index: Event or Property */
89 MONO_MT_HS_IDX,
90
91 /* ResolutionScope coded index: Module, ModuleRef, AssemblytRef, TypeRef */
92 MONO_MT_RS_IDX
93 };
94
95 const static unsigned char TableSchemas [] = {
96 #define ASSEMBLY_SCHEMA_OFFSET 0
97 MONO_MT_UINT32, /* "HashId" }, */
98 MONO_MT_UINT16, /* "Major" }, */
99 MONO_MT_UINT16, /* "Minor" }, */
100 MONO_MT_UINT16, /* "BuildNumber" }, */
101 MONO_MT_UINT16, /* "RevisionNumber" }, */
102 MONO_MT_UINT32, /* "Flags" }, */
103 MONO_MT_BLOB_IDX, /* "PublicKey" }, */
104 MONO_MT_STRING_IDX, /* "Name" }, */
105 MONO_MT_STRING_IDX, /* "Culture" }, */
106 MONO_MT_END,
107
108 #define ASSEMBLYOS_SCHEMA_OFFSET ASSEMBLY_SCHEMA_OFFSET + 10
109 MONO_MT_UINT32, /* "OSPlatformID" }, */
110 MONO_MT_UINT32, /* "OSMajor" }, */
111 MONO_MT_UINT32, /* "OSMinor" }, */
112 MONO_MT_END,
113
114 #define ASSEMBLYPROC_SCHEMA_OFFSET ASSEMBLYOS_SCHEMA_OFFSET + 4
115 MONO_MT_UINT32, /* "Processor" }, */
116 MONO_MT_END,
117
118 #define ASSEMBLYREF_SCHEMA_OFFSET ASSEMBLYPROC_SCHEMA_OFFSET + 2
119 MONO_MT_UINT16, /* "Major" }, */
120 MONO_MT_UINT16, /* "Minor" }, */
121 MONO_MT_UINT16, /* "Build" }, */
122 MONO_MT_UINT16, /* "Revision" }, */
123 MONO_MT_UINT32, /* "Flags" }, */
124 MONO_MT_BLOB_IDX, /* "PublicKeyOrToken" }, */
125 MONO_MT_STRING_IDX, /* "Name" }, */
126 MONO_MT_STRING_IDX, /* "Culture" }, */
127 MONO_MT_BLOB_IDX, /* "HashValue" }, */
128 MONO_MT_END,
129
130 #define ASSEMBLYREFOS_SCHEMA_OFFSET ASSEMBLYREF_SCHEMA_OFFSET + 10
131 MONO_MT_UINT32, /* "OSPlatformID" }, */
132 MONO_MT_UINT32, /* "OSMajorVersion" }, */
133 MONO_MT_UINT32, /* "OSMinorVersion" }, */
134 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
135 MONO_MT_END,
136
137 #define ASSEMBLYREFPROC_SCHEMA_OFFSET ASSEMBLYREFOS_SCHEMA_OFFSET + 5
138 MONO_MT_UINT32, /* "Processor" }, */
139 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
140 MONO_MT_END,
141
142 #define CLASS_LAYOUT_SCHEMA_OFFSET ASSEMBLYREFPROC_SCHEMA_OFFSET + 3
143 MONO_MT_UINT16, /* "PackingSize" }, */
144 MONO_MT_UINT32, /* "ClassSize" }, */
145 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
146 MONO_MT_END,
147
148 #define CONSTANT_SCHEMA_OFFSET CLASS_LAYOUT_SCHEMA_OFFSET + 4
149 MONO_MT_UINT8, /* "Type" }, */
150 MONO_MT_UINT8, /* "PaddingZero" }, */
151 MONO_MT_CONST_IDX, /* "Parent" }, */
152 MONO_MT_BLOB_IDX, /* "Value" }, */
153 MONO_MT_END,
154
155 #define CUSTOM_ATTR_SCHEMA_OFFSET CONSTANT_SCHEMA_OFFSET + 5
156 MONO_MT_HASCAT_IDX, /* "Parent" }, */
157 MONO_MT_CAT_IDX, /* "Type" }, */
158 MONO_MT_BLOB_IDX, /* "Value" }, */
159 MONO_MT_END,
160
161 #define DECL_SEC_SCHEMA_OFFSET CUSTOM_ATTR_SCHEMA_OFFSET + 4
162 MONO_MT_UINT16, /* "Action" }, */
163 MONO_MT_HASDEC_IDX, /* "Parent" }, */
164 MONO_MT_BLOB_IDX, /* "PermissionSet" }, */
165 MONO_MT_END,
166
167 #define EVENTMAP_SCHEMA_OFFSET DECL_SEC_SCHEMA_OFFSET + 4
168 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
169 MONO_MT_TABLE_IDX, /* "EventList:Event" }, */
170 MONO_MT_END,
171
172 #define EVENT_SCHEMA_OFFSET EVENTMAP_SCHEMA_OFFSET + 3
173 MONO_MT_UINT16, /* "EventFlags#EventAttribute" }, */
174 MONO_MT_STRING_IDX, /* "Name" }, */
175 MONO_MT_TABLE_IDX, /* "EventType" }, TypeDef or TypeRef */
176 MONO_MT_END,
177
178 #define EVENT_POINTER_SCHEMA_OFFSET EVENT_SCHEMA_OFFSET + 4
179 MONO_MT_TABLE_IDX, /* "Event" }, */
180 MONO_MT_END,
181
182 #define EXPORTED_TYPE_SCHEMA_OFFSET EVENT_POINTER_SCHEMA_OFFSET + 2
183 MONO_MT_UINT32, /* "Flags" }, */
184 MONO_MT_TABLE_IDX, /* "TypeDefId" }, */
185 MONO_MT_STRING_IDX, /* "TypeName" }, */
186 MONO_MT_STRING_IDX, /* "TypeNameSpace" }, */
187 MONO_MT_IMPL_IDX, /* "Implementation" }, */
188 MONO_MT_END,
189
190 #define FIELD_SCHEMA_OFFSET EXPORTED_TYPE_SCHEMA_OFFSET + 6
191 MONO_MT_UINT16, /* "Flags" }, */
192 MONO_MT_STRING_IDX, /* "Name" }, */
193 MONO_MT_BLOB_IDX, /* "Signature" }, */
194 MONO_MT_END,
195
196 #define FIELD_LAYOUT_SCHEMA_OFFSET FIELD_SCHEMA_OFFSET + 4
197 MONO_MT_UINT32, /* "Offset" }, */
198 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
199 MONO_MT_END,
200
201 #define FIELD_MARSHAL_SCHEMA_OFFSET FIELD_LAYOUT_SCHEMA_OFFSET + 3
202 MONO_MT_HFM_IDX, /* "Parent" }, */
203 MONO_MT_BLOB_IDX, /* "NativeType" }, */
204 MONO_MT_END,
205
206 #define FIELD_RVA_SCHEMA_OFFSET FIELD_MARSHAL_SCHEMA_OFFSET + 3
207 MONO_MT_UINT32, /* "RVA" }, */
208 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
209 MONO_MT_END,
210
211 #define FIELD_POINTER_SCHEMA_OFFSET FIELD_RVA_SCHEMA_OFFSET + 3
212 MONO_MT_TABLE_IDX, /* "Field" }, */
213 MONO_MT_END,
214
215 #define FILE_SCHEMA_OFFSET FIELD_POINTER_SCHEMA_OFFSET + 2
216 MONO_MT_UINT32, /* "Flags" }, */
217 MONO_MT_STRING_IDX, /* "Name" }, */
218 MONO_MT_BLOB_IDX, /* "Value" }, */
219 MONO_MT_END,
220
221 #define IMPLMAP_SCHEMA_OFFSET FILE_SCHEMA_OFFSET + 4
222 MONO_MT_UINT16, /* "MappingFlag" }, */
223 MONO_MT_MF_IDX, /* "MemberForwarded" }, */
224 MONO_MT_STRING_IDX, /* "ImportName" }, */
225 MONO_MT_TABLE_IDX, /* "ImportScope:ModuleRef" }, */
226 MONO_MT_END,
227
228 #define IFACEMAP_SCHEMA_OFFSET IMPLMAP_SCHEMA_OFFSET + 5
229 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
230 MONO_MT_TDOR_IDX, /* "Interface=TypeDefOrRef" }, */
231 MONO_MT_END,
232
233 #define MANIFEST_SCHEMA_OFFSET IFACEMAP_SCHEMA_OFFSET + 3
234 MONO_MT_UINT32, /* "Offset" }, */
235 MONO_MT_UINT32, /* "Flags" }, */
236 MONO_MT_STRING_IDX, /* "Name" }, */
237 MONO_MT_IMPL_IDX, /* "Implementation" }, */
238 MONO_MT_END,
239
240 #define MEMBERREF_SCHEMA_OFFSET MANIFEST_SCHEMA_OFFSET + 5
241 MONO_MT_MRP_IDX, /* "Class" }, */
242 MONO_MT_STRING_IDX, /* "Name" }, */
243 MONO_MT_BLOB_IDX, /* "Signature" }, */
244 MONO_MT_END,
245
246 #define METHOD_SCHEMA_OFFSET MEMBERREF_SCHEMA_OFFSET + 4
247 MONO_MT_UINT32, /* "RVA" }, */
248 MONO_MT_UINT16, /* "ImplFlags#MethodImplAttributes" }, */
249 MONO_MT_UINT16, /* "Flags#MethodAttribute" }, */
250 MONO_MT_STRING_IDX, /* "Name" }, */
251 MONO_MT_BLOB_IDX, /* "Signature" }, */
252 MONO_MT_TABLE_IDX, /* "ParamList:Param" }, */
253 MONO_MT_END,
254
255 #define METHOD_IMPL_SCHEMA_OFFSET METHOD_SCHEMA_OFFSET + 7
256 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
257 MONO_MT_MDOR_IDX, /* "MethodBody" }, */
258 MONO_MT_MDOR_IDX, /* "MethodDeclaration" }, */
259 MONO_MT_END,
260
261 #define METHOD_SEMA_SCHEMA_OFFSET METHOD_IMPL_SCHEMA_OFFSET + 4
262 MONO_MT_UINT16, /* "MethodSemantic" }, */
263 MONO_MT_TABLE_IDX, /* "Method:Method" }, */
264 MONO_MT_HS_IDX, /* "Association" }, */
265 MONO_MT_END,
266
267 #define METHOD_POINTER_SCHEMA_OFFSET METHOD_SEMA_SCHEMA_OFFSET + 4
268 MONO_MT_TABLE_IDX, /* "Method" }, */
269 MONO_MT_END,
270
271 #define MODULE_SCHEMA_OFFSET METHOD_POINTER_SCHEMA_OFFSET + 2
272 MONO_MT_UINT16, /* "Generation" }, */
273 MONO_MT_STRING_IDX, /* "Name" }, */
274 MONO_MT_GUID_IDX, /* "MVID" }, */
275 MONO_MT_GUID_IDX, /* "EncID" }, */
276 MONO_MT_GUID_IDX, /* "EncBaseID" }, */
277 MONO_MT_END,
278
279 #define MODULEREF_SCHEMA_OFFSET MODULE_SCHEMA_OFFSET + 6
280 MONO_MT_STRING_IDX, /* "Name" }, */
281 MONO_MT_END,
282
283 #define NESTED_CLASS_SCHEMA_OFFSET MODULEREF_SCHEMA_OFFSET + 2
284 MONO_MT_TABLE_IDX, /* "NestedClass:TypeDef" }, */
285 MONO_MT_TABLE_IDX, /* "EnclosingClass:TypeDef" }, */
286 MONO_MT_END,
287
288 #define PARAM_SCHEMA_OFFSET NESTED_CLASS_SCHEMA_OFFSET + 3
289 MONO_MT_UINT16, /* "Flags" }, */
290 MONO_MT_UINT16, /* "Sequence" }, */
291 MONO_MT_STRING_IDX, /* "Name" }, */
292 MONO_MT_END,
293
294 #define PARAM_POINTER_SCHEMA_OFFSET PARAM_SCHEMA_OFFSET + 4
295 MONO_MT_TABLE_IDX, /* "Param" }, */
296 MONO_MT_END,
297
298 #define PROPERTY_SCHEMA_OFFSET PARAM_POINTER_SCHEMA_OFFSET + 2
299 MONO_MT_UINT16, /* "Flags" }, */
300 MONO_MT_STRING_IDX, /* "Name" }, */
301 MONO_MT_BLOB_IDX, /* "Type" }, */
302 MONO_MT_END,
303
304 #define PROPERTY_POINTER_SCHEMA_OFFSET PROPERTY_SCHEMA_OFFSET + 4
305 MONO_MT_TABLE_IDX, /* "Property" }, */
306 MONO_MT_END,
307
308 #define PROPERTY_MAP_SCHEMA_OFFSET PROPERTY_POINTER_SCHEMA_OFFSET + 2
309 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
310 MONO_MT_TABLE_IDX, /* "PropertyList:Property" }, */
311 MONO_MT_END,
312
313 #define STDALON_SIG_SCHEMA_OFFSET PROPERTY_MAP_SCHEMA_OFFSET + 3
314 MONO_MT_BLOB_IDX, /* "Signature" }, */
315 MONO_MT_END,
316
317 #define TYPEDEF_SCHEMA_OFFSET STDALON_SIG_SCHEMA_OFFSET + 2
318 MONO_MT_UINT32, /* "Flags" }, */
319 MONO_MT_STRING_IDX, /* "Name" }, */
320 MONO_MT_STRING_IDX, /* "Namespace" }, */
321 MONO_MT_TDOR_IDX, /* "Extends" }, */
322 MONO_MT_TABLE_IDX, /* "FieldList:Field" }, */
323 MONO_MT_TABLE_IDX, /* "MethodList:Method" }, */
324 MONO_MT_END,
325
326 #define TYPEREF_SCHEMA_OFFSET TYPEDEF_SCHEMA_OFFSET + 7
327 MONO_MT_RS_IDX, /* "ResolutionScope=ResolutionScope" }, */
328 MONO_MT_STRING_IDX, /* "Name" }, */
329 MONO_MT_STRING_IDX, /* "Namespace" }, */
330 MONO_MT_END,
331
332 #define TYPESPEC_SCHEMA_OFFSET TYPEREF_SCHEMA_OFFSET + 4
333 MONO_MT_BLOB_IDX, /* "Signature" }, */
334 MONO_MT_END,
335
336 #define GENPARAM_SCHEMA_OFFSET TYPESPEC_SCHEMA_OFFSET + 2
337 MONO_MT_UINT16, /* "Number" }, */
338 MONO_MT_UINT16, /* "Flags" }, */
339 MONO_MT_TABLE_IDX, /* "Owner" }, TypeDef or MethodDef */
340 MONO_MT_STRING_IDX, /* "Name" }, */
341 MONO_MT_END,
342
343 #define METHOD_SPEC_SCHEMA_OFFSET GENPARAM_SCHEMA_OFFSET + 5
344 MONO_MT_MDOR_IDX, /* "Method" }, */
345 MONO_MT_BLOB_IDX, /* "Signature" }, */
346 MONO_MT_END,
347
348 #define GEN_CONSTRAINT_SCHEMA_OFFSET METHOD_SPEC_SCHEMA_OFFSET + 3
349 MONO_MT_TABLE_IDX, /* "GenericParam" }, */
350 MONO_MT_TDOR_IDX, /* "Constraint" }, */
351 MONO_MT_END,
352
353 #define NULL_SCHEMA_OFFSET GEN_CONSTRAINT_SCHEMA_OFFSET + 3
354 MONO_MT_END
355 };
356
357 /* Must be the same order as MONO_TABLE_* */
358 const static unsigned char
359 table_description [] = {
360 MODULE_SCHEMA_OFFSET,
361 TYPEREF_SCHEMA_OFFSET,
362 TYPEDEF_SCHEMA_OFFSET,
363 FIELD_POINTER_SCHEMA_OFFSET,
364 FIELD_SCHEMA_OFFSET,
365 METHOD_POINTER_SCHEMA_OFFSET,
366 METHOD_SCHEMA_OFFSET,
367 PARAM_POINTER_SCHEMA_OFFSET,
368 PARAM_SCHEMA_OFFSET,
369 IFACEMAP_SCHEMA_OFFSET,
370 MEMBERREF_SCHEMA_OFFSET, /* 0xa */
371 CONSTANT_SCHEMA_OFFSET,
372 CUSTOM_ATTR_SCHEMA_OFFSET,
373 FIELD_MARSHAL_SCHEMA_OFFSET,
374 DECL_SEC_SCHEMA_OFFSET,
375 CLASS_LAYOUT_SCHEMA_OFFSET,
376 FIELD_LAYOUT_SCHEMA_OFFSET, /* 0x10 */
377 STDALON_SIG_SCHEMA_OFFSET,
378 EVENTMAP_SCHEMA_OFFSET,
379 EVENT_POINTER_SCHEMA_OFFSET,
380 EVENT_SCHEMA_OFFSET,
381 PROPERTY_MAP_SCHEMA_OFFSET,
382 PROPERTY_POINTER_SCHEMA_OFFSET,
383 PROPERTY_SCHEMA_OFFSET,
384 METHOD_SEMA_SCHEMA_OFFSET,
385 METHOD_IMPL_SCHEMA_OFFSET,
386 MODULEREF_SCHEMA_OFFSET, /* 0x1a */
387 TYPESPEC_SCHEMA_OFFSET,
388 IMPLMAP_SCHEMA_OFFSET,
389 FIELD_RVA_SCHEMA_OFFSET,
390 NULL_SCHEMA_OFFSET,
391 NULL_SCHEMA_OFFSET,
392 ASSEMBLY_SCHEMA_OFFSET, /* 0x20 */
393 ASSEMBLYPROC_SCHEMA_OFFSET,
394 ASSEMBLYOS_SCHEMA_OFFSET,
395 ASSEMBLYREF_SCHEMA_OFFSET,
396 ASSEMBLYREFPROC_SCHEMA_OFFSET,
397 ASSEMBLYREFOS_SCHEMA_OFFSET,
398 FILE_SCHEMA_OFFSET,
399 EXPORTED_TYPE_SCHEMA_OFFSET,
400 MANIFEST_SCHEMA_OFFSET,
401 NESTED_CLASS_SCHEMA_OFFSET,
402 GENPARAM_SCHEMA_OFFSET, /* 0x2a */
403 METHOD_SPEC_SCHEMA_OFFSET,
404 GEN_CONSTRAINT_SCHEMA_OFFSET
405 };
406
407 #ifdef HAVE_ARRAY_ELEM_INIT
408 #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
409 #define MSGSTRFIELD1(line) str##line
410 static const struct msgstr_t {
411 #define TABLEDEF(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
412 #include "mono/cil/tables.def"
413 #undef TABLEDEF
414 } tablestr = {
415 #define TABLEDEF(a,b) b,
416 #include "mono/cil/tables.def"
417 #undef TABLEDEF
418 };
419 static const gint16 tableidx [] = {
420 #define TABLEDEF(a,b) [a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
421 #include "mono/cil/tables.def"
422 #undef TABLEDEF
423 };
424
425 #else
426 #define TABLEDEF(a,b) b,
427 static const char* const
428 mono_tables_names [] = {
429 #include "mono/cil/tables.def"
430 NULL
431 };
432
433 #endif
434
435 /**
436 * mono_meta_table_name:
437 * @table: table index
438 *
439 * Returns: the name for the @table index
440 */
441 const char *
442 mono_meta_table_name (int table)
443 {
444 if ((table < 0) || (table > MONO_TABLE_LAST))
445 return "";
446
447 #ifdef HAVE_ARRAY_ELEM_INIT
448 return (const char*)&tablestr + tableidx [table];
449 #else
450 return mono_tables_names [table];
451 #endif
452 }
453
454 /* The guy who wrote the spec for this should not be allowed near a
455 * computer again.
456
457 If e is a coded token(see clause 23.1.7) that points into table ti out of n possible tables t0, .. tn-1,
458 then it is stored as e << (log n) & tag{ t0, .. tn-1}[ ti] using 2 bytes if the maximum number of
459 rows of tables t0, ..tn-1, is less than 2^16 - (log n), and using 4 bytes otherwise. The family of
460 finite maps tag{ t0, ..tn-1} is defined below. Note that to decode a physical row, you need the
461 inverse of this mapping.
462
463 */
464 #define rtsize(s,b) (((s) < (1 << (b)) ? 2 : 4))
465 #define idx_size(tableidx) (meta->tables [(tableidx)].rows < 65536 ? 2 : 4)
466
467 /* Reference: Partition II - 23.2.6 */
468 /*
469 * mono_metadata_compute_size:
470 * @meta: metadata context
471 * @tableindex: metadata table number
472 * @result_bitfield: pointer to guint32 where to store additional info
473 *
474 * mono_metadata_compute_size() computes the lenght in bytes of a single
475 * row in a metadata table. The size of each column is encoded in the
476 * @result_bitfield return value along with the number of columns in the table.
477 * the resulting bitfield should be handed to the mono_metadata_table_size()
478 * and mono_metadata_table_count() macros.
479 * This is a Mono runtime internal only function.
480 */
481 int
482 mono_metadata_compute_size (MonoImage *meta, int tableindex, guint32 *result_bitfield)
483 {
484 guint32 bitfield = 0;
485 int size = 0, field_size = 0;
486 int i, n, code;
487 int shift = 0;
488 const unsigned char *description = TableSchemas + table_description [tableindex];
489
490 for (i = 0; (code = description [i]) != MONO_MT_END; i++){
491 switch (code){
492 case MONO_MT_UINT32:
493 field_size = 4; break;
494
495 case MONO_MT_UINT16:
496 field_size = 2; break;
497
498 case MONO_MT_UINT8:
499 field_size = 1; break;
500
501 case MONO_MT_BLOB_IDX:
502 field_size = meta->idx_blob_wide ? 4 : 2; break;
503
504 case MONO_MT_STRING_IDX:
505 field_size = meta->idx_string_wide ? 4 : 2; break;
506
507 case MONO_MT_GUID_IDX:
508 field_size = meta->idx_guid_wide ? 4 : 2; break;
509
510 case MONO_MT_TABLE_IDX:
511 /* Uhm, a table index can point to other tables besides the current one
512 * so, it's not correct to use the rowcount of the current table to
513 * get the size for this column - lupus
514 */
515 switch (tableindex) {
516 case MONO_TABLE_ASSEMBLYREFOS:
517 g_assert (i == 3);
518 field_size = idx_size (MONO_TABLE_ASSEMBLYREF); break;
519 case MONO_TABLE_ASSEMBLYPROCESSOR:
520 g_assert (i == 1);
521 field_size = idx_size (MONO_TABLE_ASSEMBLYREF); break;
522 case MONO_TABLE_CLASSLAYOUT:
523 g_assert (i == 2);
524 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
525 case MONO_TABLE_EVENTMAP:
526 g_assert (i == 0 || i == 1);
527 field_size = i ? idx_size (MONO_TABLE_EVENT):
528 idx_size(MONO_TABLE_TYPEDEF);
529 break;
530 case MONO_TABLE_EVENT:
531 g_assert (i == 2);
532 field_size = MAX (idx_size (MONO_TABLE_TYPEDEF), idx_size(MONO_TABLE_TYPEREF));
533 field_size = MAX (field_size, idx_size(MONO_TABLE_TYPESPEC));
534 break;
535 case MONO_TABLE_EVENT_POINTER:
536 g_assert (i == 0);
537 field_size = idx_size (MONO_TABLE_EVENT); break;
538 case MONO_TABLE_EXPORTEDTYPE:
539 g_assert (i == 1);
540 /* the index is in another metadata file, so it must be 4 */
541 field_size = 4; break;
542 case MONO_TABLE_FIELDLAYOUT:
543 g_assert (i == 1);
544 field_size = idx_size (MONO_TABLE_FIELD); break;
545 case MONO_TABLE_FIELDRVA:
546 g_assert (i == 1);
547 field_size = idx_size (MONO_TABLE_FIELD); break;
548 case MONO_TABLE_FIELD_POINTER:
549 g_assert (i == 0);
550 field_size = idx_size (MONO_TABLE_FIELD); break;
551 case MONO_TABLE_IMPLMAP:
552 g_assert (i == 3);
553 field_size = idx_size (MONO_TABLE_MODULEREF); break;
554 case MONO_TABLE_INTERFACEIMPL:
555 g_assert (i == 0);
556 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
557 case MONO_TABLE_METHOD:
558 g_assert (i == 5);
559 field_size = idx_size (MONO_TABLE_PARAM); break;
560 case MONO_TABLE_METHODIMPL:
561 g_assert (i == 0);
562 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
563 case MONO_TABLE_METHODSEMANTICS:
564 g_assert (i == 1);
565 field_size = idx_size (MONO_TABLE_METHOD); break;
566 case MONO_TABLE_METHOD_POINTER:
567 g_assert (i == 0);
568 field_size = idx_size (MONO_TABLE_METHOD); break;
569 case MONO_TABLE_NESTEDCLASS:
570 g_assert (i == 0 || i == 1);
571 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
572 case MONO_TABLE_PARAM_POINTER:
573 g_assert (i == 0);
574 field_size = idx_size (MONO_TABLE_PARAM); break;
575 case MONO_TABLE_PROPERTYMAP:
576 g_assert (i == 0 || i == 1);
577 field_size = i ? idx_size (MONO_TABLE_PROPERTY):
578 idx_size(MONO_TABLE_TYPEDEF);
579 break;
580 case MONO_TABLE_PROPERTY_POINTER:
581 g_assert (i == 0);
582 field_size = idx_size (MONO_TABLE_PROPERTY); break;
583 case MONO_TABLE_TYPEDEF:
584 g_assert (i == 4 || i == 5);
585 field_size = i == 4 ? idx_size (MONO_TABLE_FIELD):
586 idx_size(MONO_TABLE_METHOD);
587 break;
588 case MONO_TABLE_GENERICPARAM:
589 g_assert (i == 2 || i == 4 || i == 5);
590 if (i == 2)
591 field_size = MAX (idx_size (MONO_TABLE_METHOD), idx_size (MONO_TABLE_TYPEDEF));
592 else if (i == 4)
593 field_size = idx_size (MONO_TABLE_TYPEDEF);
594 else if (i == 5)
595 field_size = idx_size (MONO_TABLE_TYPEDEF);
596 break;
597
598 case MONO_TABLE_GENERICPARAMCONSTRAINT:
599 g_assert (i == 0);
600 field_size = idx_size (MONO_TABLE_GENERICPARAM);
601 break;
602
603 default:
604 g_assert_not_reached ();
605 }
606 break;
607
608 /*
609 * HasConstant: ParamDef, FieldDef, Property
610 */
611 case MONO_MT_CONST_IDX:
612 n = MAX (meta->tables [MONO_TABLE_PARAM].rows,
613 meta->tables [MONO_TABLE_FIELD].rows);
614 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
615
616 /* 2 bits to encode tag */
617 field_size = rtsize (n, 16-2);
618 break;
619
620 /*
621 * HasCustomAttribute: points to any table but
622 * itself.
623 */
624 case MONO_MT_HASCAT_IDX:
625 /*
626 * We believe that since the signature and
627 * permission are indexing the Blob heap,
628 * we should consider the blob size first
629 */
630 /* I'm not a believer - lupus
631 if (meta->idx_blob_wide){
632 field_size = 4;
633 break;
634 }*/
635
636 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
637 meta->tables [MONO_TABLE_FIELD].rows);
638 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
639 n = MAX (n, meta->tables [MONO_TABLE_TYPEDEF].rows);
640 n = MAX (n, meta->tables [MONO_TABLE_PARAM].rows);
641 n = MAX (n, meta->tables [MONO_TABLE_INTERFACEIMPL].rows);
642 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
643 n = MAX (n, meta->tables [MONO_TABLE_MODULE].rows);
644 n = MAX (n, meta->tables [MONO_TABLE_DECLSECURITY].rows);
645 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
646 n = MAX (n, meta->tables [MONO_TABLE_EVENT].rows);
647 n = MAX (n, meta->tables [MONO_TABLE_STANDALONESIG].rows);
648 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
649 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
650 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
651 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
652 n = MAX (n, meta->tables [MONO_TABLE_FILE].rows);
653 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
654 n = MAX (n, meta->tables [MONO_TABLE_MANIFESTRESOURCE].rows);
655
656 /* 5 bits to encode */
657 field_size = rtsize (n, 16-5);
658 break;
659
660 /*
661 * CustomAttributeType: TypeDef, TypeRef, MethodDef,
662 * MemberRef and String.
663 */
664 case MONO_MT_CAT_IDX:
665 /* String is a heap, if it is wide, we know the size */
666 /* See above, nope.
667 if (meta->idx_string_wide){
668 field_size = 4;
669 break;
670 }*/
671
672 n = MAX (meta->tables [MONO_TABLE_TYPEREF].rows,
673 meta->tables [MONO_TABLE_TYPEDEF].rows);
674 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
675 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
676
677 /* 3 bits to encode */
678 field_size = rtsize (n, 16-3);
679 break;
680
681 /*
682 * HasDeclSecurity: Typedef, MethodDef, Assembly
683 */
684 case MONO_MT_HASDEC_IDX:
685 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
686 meta->tables [MONO_TABLE_METHOD].rows);
687 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
688
689 /* 2 bits to encode */
690 field_size = rtsize (n, 16-2);
691 break;
692
693 /*
694 * Implementation: File, AssemblyRef, ExportedType
695 */
696 case MONO_MT_IMPL_IDX:
697 n = MAX (meta->tables [MONO_TABLE_FILE].rows,
698 meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
699 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
700
701 /* 2 bits to encode tag */
702 field_size = rtsize (n, 16-2);
703 break;
704
705 /*
706 * HasFieldMarshall: FieldDef, ParamDef
707 */
708 case MONO_MT_HFM_IDX:
709 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
710 meta->tables [MONO_TABLE_PARAM].rows);
711
712 /* 1 bit used to encode tag */
713 field_size = rtsize (n, 16-1);
714 break;
715
716 /*
717 * MemberForwarded: FieldDef, MethodDef
718 */
719 case MONO_MT_MF_IDX:
720 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
721 meta->tables [MONO_TABLE_METHOD].rows);
722
723 /* 1 bit used to encode tag */
724 field_size = rtsize (n, 16-1);
725 break;
726
727 /*
728 * TypeDefOrRef: TypeDef, ParamDef, TypeSpec
729 * LAMESPEC
730 * It is TypeDef, _TypeRef_, TypeSpec, instead.
731 */
732 case MONO_MT_TDOR_IDX:
733 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
734 meta->tables [MONO_TABLE_TYPEREF].rows);
735 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
736
737 /* 2 bits to encode */
738 field_size = rtsize (n, 16-2);
739 break;
740
741 /*
742 * MemberRefParent: TypeDef, TypeRef, MethodDef, ModuleRef, TypeSpec, MemberRef
743 */
744 case MONO_MT_MRP_IDX:
745 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
746 meta->tables [MONO_TABLE_TYPEREF].rows);
747 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
748 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
749 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
750 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
751
752 /* 3 bits to encode */
753 field_size = rtsize (n, 16 - 3);
754 break;
755
756 /*
757 * MethodDefOrRef: MethodDef, MemberRef
758 */
759 case MONO_MT_MDOR_IDX:
760 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
761 meta->tables [MONO_TABLE_MEMBERREF].rows);
762
763 /* 1 bit used to encode tag */
764 field_size = rtsize (n, 16-1);
765 break;
766
767 /*
768 * HasSemantics: Property, Event
769 */
770 case MONO_MT_HS_IDX:
771 n = MAX (meta->tables [MONO_TABLE_PROPERTY].rows,
772 meta->tables [MONO_TABLE_EVENT].rows);
773
774 /* 1 bit used to encode tag */
775 field_size = rtsize (n, 16-1);
776 break;
777
778 /*
779 * ResolutionScope: Module, ModuleRef, AssemblyRef, TypeRef
780 */
781 case MONO_MT_RS_IDX:
782 n = MAX (meta->tables [MONO_TABLE_MODULE].rows,
783 meta->tables [MONO_TABLE_MODULEREF].rows);
784 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
785 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
786
787 /* 2 bits used to encode tag (ECMA spec claims 3) */
788 field_size = rtsize (n, 16 - 2);
789 break;
790 }
791
792 /*
793 * encode field size as follows (we just need to
794 * distinguish them).
795 *
796 * 4 -> 3
797 * 2 -> 1
798 * 1 -> 0
799 */
800 bitfield |= (field_size-1) << shift;
801 shift += 2;
802 size += field_size;
803 /*g_print ("table %02x field %d size %d\n", tableindex, i, field_size);*/
804 }
805
806 *result_bitfield = (i << 24) | bitfield;
807 return size;
808 }
809
810 /**
811 * mono_metadata_compute_table_bases:
812 * @meta: metadata context to compute table values
813 *
814 * Computes the table bases for the metadata structure.
815 * This is an internal function used by the image loader code.
816 */
817 void
818 mono_metadata_compute_table_bases (MonoImage *meta)
819 {
820 int i;
821 const char *base = meta->tables_base;
822
823 for (i = 0; i < MONO_TABLE_NUM; i++) {
824 MonoTableInfo *table = &meta->tables [i];
825 if (table->rows == 0)
826 continue;
827
828 table->row_size = mono_metadata_compute_size (meta, i, &table->size_bitfield);
829 table->base = base;
830 base += table->rows * table->row_size;
831 }
832 }
833
834 /**
835 * mono_metadata_locate:
836 * @meta: metadata context
837 * @table: table code.
838 * @idx: index of element to retrieve from @table.
839 *
840 * Returns: a pointer to the @idx element in the metadata table
841 * whose code is @table.
842 */
843 const char *
844 mono_metadata_locate (MonoImage *meta, int table, int idx)
845 {
846 /* idx == 0 refers always to NULL */
847 g_return_val_if_fail (idx > 0 && idx <= meta->tables [table].rows, "");
848
849 return meta->tables [table].base + (meta->tables [table].row_size * (idx - 1));
850 }
851
852 /**
853 * mono_metadata_locate_token:
854 * @meta: metadata context
855 * @token: metadata token
856 *
857 * Returns: a pointer to the data in the metadata represented by the
858 * token #token.
859 */
860 const char *
861 mono_metadata_locate_token (MonoImage *meta, guint32 token)
862 {
863 return mono_metadata_locate (meta, token >> 24, token & 0xffffff);
864 }
865
866 /**
867 * mono_metadata_string_heap:
868 * @meta: metadata context
869 * @index: index into the string heap.
870 *
871 * Returns: an in-memory pointer to the @index in the string heap.
872 */
873 const char *
874 mono_metadata_string_heap (MonoImage *meta, guint32 index)
875 {
876 g_return_val_if_fail (index < meta->heap_strings.size, "");
877 return meta->heap_strings.data + index;
878 }
879
880 /**
881 * mono_metadata_user_string:
882 * @meta: metadata context
883 * @index: index into the user string heap.
884 *
885 * Returns: an in-memory pointer to the @index in the user string heap ("#US").
886 */
887 const char *
888 mono_metadata_user_string (MonoImage *meta, guint32 index)
889 {
890 g_return_val_if_fail (index < meta->heap_us.size, "");
891 return meta->heap_us.data + index;
892 }
893
894 /**
895 * mono_metadata_blob_heap:
896 * @meta: metadata context
897 * @index: index into the blob.
898 *
899 * Returns: an in-memory pointer to the @index in the Blob heap.
900 */
901 const char *
902 mono_metadata_blob_heap (MonoImage *meta, guint32 index)
903 {
904 g_return_val_if_fail (index < meta->heap_blob.size, "");
905 return meta->heap_blob.data + index;
906 }
907
908 /**
909 * mono_metadata_guid_heap:
910 * @meta: metadata context
911 * @index: index into the guid heap.
912 *
913 * Returns: an in-memory pointer to the @index in the guid heap.
914 */
915 const char *
916 mono_metadata_guid_heap (MonoImage *meta, guint32 index)
917 {
918 --index;
919 index *= 16; /* adjust for guid size and 1-based index */
920 g_return_val_if_fail (index < meta->heap_guid.size, "");
921 return meta->heap_guid.data + index;
922 }
923
924 static const unsigned char *
925 dword_align (const unsigned char *ptr)
926 {
927 #if SIZEOF_VOID_P == 8
928 return (const unsigned char *) (((guint64) (ptr + 3)) & ~3);
929 #else
930 return (const unsigned char *) (((guint32) (ptr + 3)) & ~3);
931 #endif
932 }
933
934 /**
935 * mono_metadata_decode_row:
936 * @t: table to extract information from.
937 * @idx: index in table.
938 * @res: array of @res_size cols to store the results in
939 *
940 * This decompresses the metadata element @idx in table @t
941 * into the guint32 @res array that has res_size elements
942 */
943 void
944 mono_metadata_decode_row (const MonoTableInfo *t, int idx, guint32 *res, int res_size)
945 {
946 guint32 bitfield = t->size_bitfield;
947 int i, count = mono_metadata_table_count (bitfield);
948 const char *data = t->base + idx * t->row_size;
949
950 g_assert (res_size == count);
951
952 for (i = 0; i < count; i++) {
953 int n = mono_metadata_table_size (bitfield, i);
954
955 switch (n){
956 case 1:
957 res [i] = *data; break;
958 case 2:
959 res [i] = read16 (data); break;
960 case 4:
961 res [i] = read32 (data); break;
962 default:
963 g_assert_not_reached ();
964 }
965 data += n;
966 }
967 }
968
969 /**
970 * mono_metadata_decode_row_col:
971 * @t: table to extract information from.
972 * @idx: index for row in table.
973 * @col: column in the row.
974 *
975 * This function returns the value of column @col from the @idx
976 * row in the table @t.
977 */
978 guint32
979 mono_metadata_decode_row_col (const MonoTableInfo *t, int idx, guint col)
980 {
981 guint32 bitfield = t->size_bitfield;
982 int i;
983 register const char *data = t->base + idx * t->row_size;
984 register int n;
985
986 g_assert (col < mono_metadata_table_count (bitfield));
987
988 n = mono_metadata_table_size (bitfield, 0);
989 for (i = 0; i < col; ++i) {
990 data += n;
991 n = mono_metadata_table_size (bitfield, i + 1);
992 }
993 switch (n) {
994 case 1:
995 return *data;
996 case 2:
997 return read16 (data);
998 case 4:
999 return read32 (data);
1000 default:
1001 g_assert_not_reached ();
1002 }
1003 return 0;
1004 }
1005
1006 /**
1007 * mono_metadata_decode_blob_size:
1008 * @ptr: pointer to a blob object
1009 * @rptr: the new position of the pointer
1010 *
1011 * This decodes a compressed size as described by 23.1.4 (a blob or user string object)
1012 *
1013 * Returns: the size of the blob object
1014 */
1015 guint32
1016 mono_metadata_decode_blob_size (const char *xptr, const char **rptr)
1017 {
1018 const unsigned char *ptr = (const unsigned char *)xptr;
1019 guint32 size;
1020
1021 if ((*ptr & 0x80) == 0){
1022 size = ptr [0] & 0x7f;
1023 ptr++;
1024 } else if ((*ptr & 0x40) == 0){
1025 size = ((ptr [0] & 0x3f) << 8) + ptr [1];
1026 ptr += 2;
1027 } else {
1028 size = ((ptr [0] & 0x1f) << 24) +
1029 (ptr [1] << 16) +
1030 (ptr [2] << 8) +
1031 ptr [3];
1032 ptr += 4;
1033 }
1034 if (rptr)
1035 *rptr = (char*)ptr;
1036 return size;
1037 }
1038
1039 /**
1040 * mono_metadata_decode_value:
1041 * @ptr: pointer to decode from
1042 * @rptr: the new position of the pointer
1043 *
1044 * This routine decompresses 32-bit values as specified in the "Blob and
1045 * Signature" section (22.2)
1046 *
1047 * Returns: the decoded value
1048 */
1049 guint32
1050 mono_metadata_decode_value (const char *_ptr, const char **rptr)
1051 {
1052 const unsigned char *ptr = (const unsigned char *) _ptr;
1053 unsigned char b = *ptr;
1054 guint32 len;
1055
1056 if ((b & 0x80) == 0){
1057 len = b;
1058 ++ptr;
1059 } else if ((b & 0x40) == 0){
1060 len = ((b & 0x3f) << 8 | ptr [1]);
1061 ptr += 2;
1062 } else {
1063 len = ((b & 0x1f) << 24) |
1064 (ptr [1] << 16) |
1065 (ptr [2] << 8) |
1066 ptr [3];
1067 ptr += 4;
1068 }
1069 if (rptr)
1070 *rptr = (char*)ptr;
1071
1072 return len;
1073 }
1074
1075 /**
1076 * mono_metadata_decode_signed_value:
1077 * @ptr: pointer to decode from
1078 * @rptr: the new position of the pointer
1079 *
1080 * This routine decompresses 32-bit signed values
1081 * (not specified in the spec)
1082 *
1083 * Returns: the decoded value
1084 */
1085 gint32
1086 mono_metadata_decode_signed_value (const char *ptr, const char **rptr)
1087 {
1088 guint32 uval = mono_metadata_decode_value (ptr, rptr);
1089 gint32 ival = uval >> 1;
1090 if (!(uval & 1))
1091 return ival;
1092 /* ival is a truncated 2's complement negative number. */
1093 if (ival < 0x40)
1094 /* 6 bits = 7 bits for compressed representation (top bit is '0') - 1 sign bit */
1095 return ival - 0x40;
1096 if (ival < 0x2000)
1097 /* 13 bits = 14 bits for compressed representation (top bits are '10') - 1 sign bit */
1098 return ival - 0x2000;
1099 if (ival < 0x10000000)
1100 /* 28 bits = 29 bits for compressed representation (top bits are '110') - 1 sign bit */
1101 return ival - 0x10000000;
1102 g_assert (ival < 0x20000000);
1103 g_warning ("compressed signed value appears to use 29 bits for compressed representation: %x (raw: %8x)", ival, uval);
1104 return ival - 0x20000000;
1105 }
1106
1107 /*
1108 * Translates the given 1-based index into the Method, Field, Event, or Param tables
1109 * using the *Ptr tables in uncompressed metadata, if they are available.
1110 *
1111 * FIXME: The caller is not forced to call this function, which is error-prone, since
1112 * forgetting to call it would only show up as a bug on uncompressed metadata.
1113 */
1114 guint32
1115 mono_metadata_translate_token_index (MonoImage *image, int table, guint32 idx)
1116 {
1117 if (!image->uncompressed_metadata)
1118 return idx;
1119
1120 switch (table) {
1121 case MONO_TABLE_METHOD:
1122 if (image->tables [MONO_TABLE_METHOD_POINTER].rows)
1123 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_METHOD_POINTER], idx - 1, MONO_METHOD_POINTER_METHOD);
1124 else
1125 return idx;
1126 case MONO_TABLE_FIELD:
1127 if (image->tables [MONO_TABLE_FIELD_POINTER].rows)
1128 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_FIELD_POINTER], idx - 1, MONO_FIELD_POINTER_FIELD);
1129 else
1130 return idx;
1131 case MONO_TABLE_EVENT:
1132 if (image->tables [MONO_TABLE_EVENT_POINTER].rows)
1133 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_EVENT_POINTER], idx - 1, MONO_EVENT_POINTER_EVENT);
1134 else
1135 return idx;
1136 case MONO_TABLE_PROPERTY:
1137 if (image->tables [MONO_TABLE_PROPERTY_POINTER].rows)
1138 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PROPERTY_POINTER], idx - 1, MONO_PROPERTY_POINTER_PROPERTY);
1139 else
1140 return idx;
1141 case MONO_TABLE_PARAM:
1142 if (image->tables [MONO_TABLE_PARAM_POINTER].rows)
1143 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PARAM_POINTER], idx - 1, MONO_PARAM_POINTER_PARAM);
1144 else
1145 return idx;
1146 default:
1147 return idx;
1148 }
1149 }
1150
1151 /**
1152 * mono_metadata_decode_table_row:
1153 *
1154 * Same as mono_metadata_decode_row, but takes an IMAGE+TABLE ID pair, and takes
1155 * uncompressed metadata into account, so it should be used to access the
1156 * Method, Field, Param and Event tables when the access is made from metadata, i.e.
1157 * IDX is retrieved from a metadata table, like MONO_TYPEDEF_FIELD_LIST.
1158 */
1159 void
1160 mono_metadata_decode_table_row (MonoImage *image, int table, int idx, guint32 *res, int res_size)
1161 {
1162 if (image->uncompressed_metadata)
1163 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1164
1165 mono_metadata_decode_row (&image->tables [table], idx, res, res_size);
1166 }
1167
1168 /**
1169 * mono_metadata_decode_table_row_col:
1170 *
1171 * Same as mono_metadata_decode_row_col, but takes an IMAGE+TABLE ID pair, and takes
1172 * uncompressed metadata into account, so it should be used to access the
1173 * Method, Field, Param and Event tables.
1174 */
1175 guint32 mono_metadata_decode_table_row_col (MonoImage *image, int table, int idx, guint col)
1176 {
1177 if (image->uncompressed_metadata)
1178 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1179
1180 return mono_metadata_decode_row_col (&image->tables [table], idx, col);
1181 }
1182
1183 /*
1184 * mono_metadata_parse_typedef_or_ref:
1185 * @m: a metadata context.
1186 * @ptr: a pointer to an encoded TypedefOrRef in @m
1187 * @rptr: pointer updated to match the end of the decoded stream
1188 *
1189 * Returns: a token valid in the @m metadata decoded from
1190 * the compressed representation.
1191 */
1192 guint32
1193 mono_metadata_parse_typedef_or_ref (MonoImage *m, const char *ptr, const char **rptr)
1194 {
1195 guint32 token;
1196 token = mono_metadata_decode_value (ptr, &ptr);
1197 if (rptr)
1198 *rptr = ptr;
1199 return mono_metadata_token_from_dor (token);
1200 }
1201
1202 /*
1203 * mono_metadata_parse_custom_mod:
1204 * @m: a metadata context.
1205 * @dest: storage where the info about the custom modifier is stored (may be NULL)
1206 * @ptr: a pointer to (possibly) the start of a custom modifier list
1207 * @rptr: pointer updated to match the end of the decoded stream
1208 *
1209 * Checks if @ptr points to a type custom modifier compressed representation.
1210 *
1211 * Returns: #TRUE if a custom modifier was found, #FALSE if not.
1212 */
1213 int
1214 mono_metadata_parse_custom_mod (MonoImage *m, MonoCustomMod *dest, const char *ptr, const char **rptr)
1215 {
1216 MonoCustomMod local;
1217 if ((*ptr == MONO_TYPE_CMOD_OPT) || (*ptr == MONO_TYPE_CMOD_REQD)) {
1218 if (!dest)
1219 dest = &local;
1220 dest->required = *ptr == MONO_TYPE_CMOD_REQD ? 1 : 0;
1221 dest->token = mono_metadata_parse_typedef_or_ref (m, ptr + 1, rptr);
1222 return TRUE;
1223 }
1224 return FALSE;
1225 }
1226
1227 /*
1228 * mono_metadata_parse_array:
1229 * @m: a metadata context.
1230 * @ptr: a pointer to an encoded array description.
1231 * @rptr: pointer updated to match the end of the decoded stream
1232 *
1233 * Decodes the compressed array description found in the metadata @m at @ptr.
1234 *
1235 * Returns: a #MonoArrayType structure describing the array type
1236 * and dimensions.
1237 */
1238 MonoArrayType *
1239 mono_metadata_parse_array_full (MonoImage *m, MonoGenericContainer *container,
1240 const char *ptr, const char **rptr)
1241 {
1242 int i;
1243 MonoArrayType *array = g_new0 (MonoArrayType, 1);
1244 MonoType *etype;
1245
1246 etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
1247 if (!etype)
1248 return NULL;
1249 array->eklass = mono_class_from_mono_type (etype);
1250 array->rank = mono_metadata_decode_value (ptr, &ptr);
1251
1252 array->numsizes = mono_metadata_decode_value (ptr, &ptr);
1253 if (array->numsizes)
1254 array->sizes = g_new0 (int, array->numsizes);
1255 for (i = 0; i < array->numsizes; ++i)
1256 array->sizes [i] = mono_metadata_decode_value (ptr, &ptr);
1257
1258 array->numlobounds = mono_metadata_decode_value (ptr, &ptr);
1259 if (array->numlobounds)
1260 array->lobounds = g_new0 (int, array->numlobounds);
1261 for (i = 0; i < array->numlobounds; ++i)
1262 array->lobounds [i] = mono_metadata_decode_signed_value (ptr, &ptr);
1263
1264 if (rptr)
1265 *rptr = ptr;
1266 return array;
1267 }
1268
1269 MonoArrayType *
1270 mono_metadata_parse_array (MonoImage *m, const char *ptr, const char **rptr)
1271 {
1272 return mono_metadata_parse_array_full (m, NULL, ptr, rptr);
1273 }
1274
1275 /*
1276 * mono_metadata_free_array:
1277 * @array: array description
1278 *
1279 * Frees the array description returned from mono_metadata_parse_array().
1280 */
1281 void
1282 mono_metadata_free_array (MonoArrayType *array)
1283 {
1284 g_free (array->sizes);
1285 g_free (array->lobounds);
1286 g_free (array);
1287 }
1288
1289 /*
1290 * need to add common field and param attributes combinations:
1291 * [out] param
1292 * public static
1293 * public static literal
1294 * private
1295 * private static
1296 * private static literal
1297 */
1298 static const MonoType
1299 builtin_types[] = {
1300 /* data, attrs, type, nmods, byref, pinned */
1301 {{NULL}, 0, MONO_TYPE_VOID, 0, 0, 0},
1302 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 0, 0},
1303 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 1, 0},
1304 {{NULL}, 0, MONO_TYPE_CHAR, 0, 0, 0},
1305 {{NULL}, 0, MONO_TYPE_CHAR, 0, 1, 0},
1306 {{NULL}, 0, MONO_TYPE_I1, 0, 0, 0},
1307 {{NULL}, 0, MONO_TYPE_I1, 0, 1, 0},
1308 {{NULL}, 0, MONO_TYPE_U1, 0, 0, 0},
1309 {{NULL}, 0, MONO_TYPE_U1, 0, 1, 0},
1310 {{NULL}, 0, MONO_TYPE_I2, 0, 0, 0},
1311 {{NULL}, 0, MONO_TYPE_I2, 0, 1, 0},
1312 {{NULL}, 0, MONO_TYPE_U2, 0, 0, 0},
1313 {{NULL}, 0, MONO_TYPE_U2, 0, 1, 0},
1314 {{NULL}, 0, MONO_TYPE_I4, 0, 0, 0},
1315 {{NULL}, 0, MONO_TYPE_I4, 0, 1, 0},
1316 {{NULL}, 0, MONO_TYPE_U4, 0, 0, 0},
1317 {{NULL}, 0, MONO_TYPE_U4, 0, 1, 0},
1318 {{NULL}, 0, MONO_TYPE_I8, 0, 0, 0},
1319 {{NULL}, 0, MONO_TYPE_I8, 0, 1, 0},
1320 {{NULL}, 0, MONO_TYPE_U8, 0, 0, 0},
1321 {{NULL}, 0, MONO_TYPE_U8, 0, 1, 0},
1322 {{NULL}, 0, MONO_TYPE_R4, 0, 0, 0},
1323 {{NULL}, 0, MONO_TYPE_R4, 0, 1, 0},
1324 {{NULL}, 0, MONO_TYPE_R8, 0, 0, 0},
1325 {{NULL}, 0, MONO_TYPE_R8, 0, 1, 0},
1326 {{NULL}, 0, MONO_TYPE_STRING, 0, 0, 0},
1327 {{NULL}, 0, MONO_TYPE_STRING, 0, 1, 0},
1328 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 0, 0},
1329 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 1, 0},
1330 {{NULL}, 0, MONO_TYPE_TYPEDBYREF, 0, 0, 0},
1331 {{NULL}, 0, MONO_TYPE_I, 0, 0, 0},
1332 {{NULL}, 0, MONO_TYPE_I, 0, 1, 0},
1333 {{NULL}, 0, MONO_TYPE_U, 0, 0, 0},
1334 {{NULL}, 0, MONO_TYPE_U, 0, 1, 0},
1335 };
1336
1337 #define NBUILTIN_TYPES() (sizeof (builtin_types) / sizeof (builtin_types [0]))
1338
1339 static GHashTable *type_cache = NULL;
1340 static GHashTable *generic_inst_cache = NULL;
1341 static GHashTable *generic_class_cache = NULL;
1342 static int next_generic_inst_id = 0;
1343
1344 static guint mono_generic_class_hash (gconstpointer data);
1345
1346 /*
1347 * MonoTypes with modifies are never cached, so we never check or use that field.
1348 */
1349 static guint
1350 mono_type_hash (gconstpointer data)
1351 {
1352 const MonoType *type = (const MonoType *) data;
1353 if (type->type == MONO_TYPE_GENERICINST)
1354 return mono_generic_class_hash (type->data.generic_class);
1355 else
1356 return type->type | (type->byref << 8) | (type->attrs << 9);
1357 }
1358
1359 static gint
1360 mono_type_equal (gconstpointer ka, gconstpointer kb)
1361 {
1362 const MonoType *a = (const MonoType *) ka;
1363 const MonoType *b = (const MonoType *) kb;
1364
1365 if (a->type != b->type || a->byref != b->byref || a->attrs != b->attrs || a->pinned != b->pinned)
1366 return 0;
1367 /* need other checks */
1368 return 1;
1369 }
1370
1371 static guint
1372 mono_generic_inst_hash (gconstpointer data)
1373 {
1374 const MonoGenericInst *ginst = (const MonoGenericInst *) data;
1375 guint hash = 0;
1376 int i;
1377
1378 for (i = 0; i < ginst->type_argc; ++i) {
1379 hash *= 13;
1380 hash += mono_metadata_type_hash (ginst->type_argv [i]);
1381 }
1382
1383 return hash ^ (ginst->is_open << 8);
1384 }
1385
1386 static gboolean
1387 mono_generic_inst_equal (gconstpointer ka, gconstpointer kb)
1388 {
1389 const MonoGenericInst *a = (const MonoGenericInst *) ka;
1390 const MonoGenericInst *b = (const MonoGenericInst *) kb;
1391 int i;
1392
1393 if ((a->is_open != b->is_open) || (a->type_argc != b->type_argc) || (a->is_reference != b->is_reference))
1394 return FALSE;
1395 for (i = 0; i < a->type_argc; ++i) {
1396 if (!do_mono_metadata_type_equal (a->type_argv [i], b->type_argv [i], FALSE))
1397 return FALSE;
1398 }
1399 return TRUE;
1400 }
1401
1402 static guint
1403 mono_generic_class_hash (gconstpointer data)
1404 {
1405 const MonoGenericClass *gclass = (const MonoGenericClass *) data;
1406 guint hash = mono_metadata_type_hash (&gclass->container_class->byval_arg);
1407
1408 hash *= 13;
1409 hash += mono_generic_inst_hash (gclass->inst);
1410
1411 return hash;
1412 }
1413
1414 static gboolean
1415 mono_generic_class_equal (gconstpointer ka, gconstpointer kb)
1416 {
1417 const MonoGenericClass *a = (const MonoGenericClass *) ka;
1418 const MonoGenericClass *b = (const MonoGenericClass *) kb;
1419
1420 return _mono_metadata_generic_class_equal (a, b, FALSE);
1421 }
1422
1423 /**
1424 * mono_metadata_init:
1425 *
1426 * Initialize the global variables of this module.
1427 * This is a Mono runtime internal function.
1428 */
1429 void
1430 mono_metadata_init (void)
1431 {
1432 int i;
1433
1434 type_cache = g_hash_table_new (mono_type_hash, mono_type_equal);
1435 generic_inst_cache = g_hash_table_new (mono_generic_inst_hash, mono_generic_inst_equal);
1436 generic_class_cache = g_hash_table_new (mono_generic_class_hash, mono_generic_class_equal);
1437
1438 for (i = 0; i < NBUILTIN_TYPES (); ++i)
1439 g_hash_table_insert (type_cache, (gpointer) &builtin_types [i], (gpointer) &builtin_types [i]);
1440 }
1441
1442 /**
1443 * mono_metadata_cleanup:
1444 *
1445 * Free all resources used by this module.
1446 * This is a Mono runtime internal function.
1447 */
1448 void
1449 mono_metadata_cleanup (void)
1450 {
1451 g_hash_table_destroy (type_cache);
1452 g_hash_table_destroy (generic_inst_cache);
1453 g_hash_table_destroy (generic_class_cache);
1454 }
1455
1456 /**
1457 * mono_metadata_parse_type:
1458 * @m: metadata context
1459 * @mode: king of type that may be found at @ptr
1460 * @opt_attrs: optional attributes to store in the returned type
1461 * @ptr: pointer to the type representation
1462 * @rptr: pointer updated to match the end of the decoded stream
1463 *
1464 * Decode a compressed type description found at @ptr in @m.
1465 * @mode can be one of MONO_PARSE_MOD_TYPE, MONO_PARSE_PARAM, MONO_PARSE_RET,
1466 * MONO_PARSE_FIELD, MONO_PARSE_LOCAL, MONO_PARSE_TYPE.
1467 * This function can be used to decode type descriptions in method signatures,
1468 * field signatures, locals signatures etc.
1469 *
1470 * To parse a generic type, `generic_container' points to the current class'es
1471 * (the `generic_container' field in the MonoClass) or the current generic method's
1472 * (the `generic_container' field in the MonoMethodNormal) generic container.
1473 * When we encounter any MONO_TYPE_VAR or MONO_TYPE_MVAR's, they're looked up in
1474 * this MonoGenericContainer.
1475 * This is a Mono runtime internal function.
1476 *
1477 * LOCKING: Assumes the loader lock is held.
1478 *
1479 * Returns: a #MonoType structure representing the decoded type.
1480 */
1481 MonoType*
1482 mono_metadata_parse_type_full (MonoImage *m, MonoGenericContainer *container, MonoParseTypeMode mode,
1483 short opt_attrs, const char *ptr, const char **rptr)
1484 {
1485 MonoType *type, *cached;
1486 MonoType stype;
1487 gboolean byref = FALSE;
1488 gboolean pinned = FALSE;
1489 const char *tmp_ptr;
1490 int count = 0;
1491 gboolean found;
1492
1493 mono_loader_lock ();
1494 /*
1495 * According to the spec, custom modifiers should come before the byref
1496 * flag, but the IL produced by ilasm from the following signature:
1497 * object modopt(...) &
1498 * starts with a byref flag, followed by the modifiers. (bug #49802)
1499 * Also, this type seems to be different from 'object & modopt(...)'. Maybe
1500 * it would be better to treat byref as real type constructor instead of
1501 * a modifier...
1502 * Also, pinned should come before anything else, but some MSV++ produced
1503 * assemblies violate this (#bug 61990).
1504 */
1505
1506 /* Count the modifiers first */
1507 tmp_ptr = ptr;
1508 found = TRUE;
1509 while (found) {
1510 switch (*tmp_ptr) {
1511 case MONO_TYPE_PINNED:
1512 case MONO_TYPE_BYREF:
1513 ++tmp_ptr;
1514 break;
1515 case MONO_TYPE_CMOD_REQD:
1516 case MONO_TYPE_CMOD_OPT:
1517 count ++;
1518 mono_metadata_parse_custom_mod (m, NULL, tmp_ptr, &tmp_ptr);
1519 break;
1520 default:
1521 found = FALSE;
1522 }
1523 }
1524
1525 if (count) {
1526 type = mono_mempool_alloc0 (m->mempool, sizeof (MonoType) + ((gint32)count - MONO_ZERO_LEN_ARRAY) * sizeof (MonoCustomMod));
1527 type->num_mods = count;
1528 if (count > 64)
1529 g_warning ("got more than 64 modifiers in type");
1530 } else {
1531 type = &stype;
1532 memset (type, 0, sizeof (MonoType));
1533 }
1534
1535 /* Parse pinned, byref and custom modifiers */
1536 found = TRUE;
1537 count = 0;
1538 while (found) {
1539 switch (*ptr) {
1540 case MONO_TYPE_PINNED:
1541 pinned = TRUE;
1542 ++ptr;
1543 break;
1544 case MONO_TYPE_BYREF:
1545 byref = TRUE;
1546 ++ptr;
1547 break;
1548 case MONO_TYPE_CMOD_REQD:
1549 case MONO_TYPE_CMOD_OPT:
1550 mono_metadata_parse_custom_mod (m, &(type->modifiers [count]), ptr, &ptr);
1551 count ++;
1552 break;
1553 default:
1554 found = FALSE;
1555 }
1556 }
1557
1558 type->attrs = opt_attrs;
1559 type->byref = byref;
1560 type->pinned = pinned ? 1 : 0;
1561
1562 if (!do_mono_metadata_parse_type (type, m, container, ptr, &ptr)) {
1563 if (type != &stype)
1564 g_free (type);
1565 mono_loader_unlock ();
1566 return NULL;
1567 }
1568
1569 if (rptr)
1570 *rptr = ptr;
1571
1572 if (!type->num_mods) {
1573 /* no need to free type here, because it is on the stack */
1574 if ((type->type == MONO_TYPE_CLASS || type->type == MONO_TYPE_VALUETYPE) && !type->pinned && !type->attrs) {
1575 MonoType *ret = type->byref ? &type->data.klass->this_arg : &type->data.klass->byval_arg;
1576
1577 /* Consider the case:
1578
1579 class Foo<T> { class Bar {} }
1580 class Test : Foo<Test>.Bar {}
1581
1582 When Foo<Test> is being expanded, 'Test' isn't yet initialized. It's actually in
1583 a really pristine state: it doesn't even know whether 'Test' is a reference or a value type.
1584
1585 We ensure that the MonoClass is in a state that we can canonicalize to:
1586
1587 klass->byval_arg.data.klass == klass
1588 klass->this_arg.data.klass == klass
1589
1590 If we can't canonicalize 'type', it doesn't matter, since later users of 'type' will do it.
1591
1592 LOCKING: even though we don't explicitly hold a lock, in the problematic case 'ret' is a field
1593 of a MonoClass which currently holds the loader lock. 'type' is local.
1594 */
1595 if (ret->data.klass == type->data.klass) {
1596 mono_loader_unlock ();
1597 return ret;
1598 }
1599 }
1600 /* No need to use locking since nobody is modifying the hash table */
1601 if ((cached = g_hash_table_lookup (type_cache, type))) {
1602 mono_loader_unlock ();
1603 return cached;
1604 }
1605 }
1606
1607 /* printf ("%x %x %c %s\n", type->attrs, type->num_mods, type->pinned ? 'p' : ' ', mono_type_full_name (type)); */
1608
1609 if (type == &stype) {
1610 type = mono_mempool_alloc (m->mempool, sizeof (MonoType));
1611 memcpy (type, &stype, sizeof (MonoType));
1612 }
1613 mono_loader_unlock ();
1614 return type;
1615 }
1616
1617 /*
1618 * LOCKING: Assumes the loader lock is held.
1619 */
1620 MonoType*
1621 mono_metadata_parse_type (MonoImage *m, MonoParseTypeMode mode, short opt_attrs,
1622 const char *ptr, const char **rptr)
1623 {
1624 return mono_metadata_parse_type_full (m, NULL, mode, opt_attrs, ptr, rptr);
1625 }
1626
1627 /*
1628 * mono_metadata_get_param_attrs:
1629 *
1630 * Return the parameter attributes for the method whose MethodDef index is DEF. The
1631 * returned memory needs to be freed by the caller. If all the param attributes are
1632 * 0, then NULL is returned.
1633 */
1634 int*
1635 mono_metadata_get_param_attrs (MonoImage *m, int def)
1636 {
1637 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1638 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1639 guint32 cols [MONO_PARAM_SIZE];
1640 guint lastp, i, param_index = mono_metadata_decode_row_col (&m->tables [MONO_TABLE_METHOD], def - 1, MONO_METHOD_PARAMLIST);
1641 int *pattrs = NULL;
1642
1643 if (def < methodt->rows)
1644 lastp = mono_metadata_decode_row_col (&m->tables [MONO_TABLE_METHOD], def, MONO_METHOD_PARAMLIST);
1645 else
1646 lastp = paramt->rows + 1;
1647
1648 for (i = param_index; i < lastp; ++i) {
1649 mono_metadata_decode_row (&m->tables [MONO_TABLE_PARAM], i - 1, cols, MONO_PARAM_SIZE);
1650 if (cols [MONO_PARAM_FLAGS]) {
1651 if (!pattrs)
1652 pattrs = g_new0 (int, 1 + (lastp - param_index));
1653 pattrs [cols [MONO_PARAM_SEQUENCE]] = cols [MONO_PARAM_FLAGS];
1654 }
1655 }
1656
1657 return pattrs;
1658 }
1659
1660 /*
1661 * mono_metadata_parse_signature_full:
1662 * @image: metadata context
1663 * @generic_container: generic container
1664 * @toke: metadata token
1665 *
1666 * Decode a method signature stored in the STANDALONESIG table
1667 *
1668 * LOCKING: Assumes the loader lock is held.
1669 *
1670 * Returns: a MonoMethodSignature describing the signature.
1671 */
1672 MonoMethodSignature*
1673 mono_metadata_parse_signature_full (MonoImage *image, MonoGenericContainer *generic_container, guint32 token)
1674 {
1675 MonoTableInfo *tables = image->tables;
1676 guint32 idx = mono_metadata_token_index (token);
1677 guint32 sig;
1678 const char *ptr;
1679
1680 if (image->dynamic)
1681 return mono_lookup_dynamic_token (image, token);
1682
1683 g_assert (mono_metadata_token_table(token) == MONO_TABLE_STANDALONESIG);
1684
1685 sig = mono_metadata_decode_row_col (&tables [MONO_TABLE_STANDALONESIG], idx - 1, 0);
1686
1687 ptr = mono_metadata_blob_heap (image, sig);
1688 mono_metadata_decode_blob_size (ptr, &ptr);
1689
1690 return mono_metadata_parse_method_signature_full (image, generic_container, 0, ptr, NULL);
1691 }
1692
1693 /*
1694 * mono_metadata_parse_signature:
1695 * @image: metadata context
1696 * @toke: metadata token
1697 *
1698 * Decode a method signature stored in the STANDALONESIG table
1699 *
1700 * Returns: a MonoMethodSignature describing the signature.
1701 */
1702 MonoMethodSignature*
1703 mono_metadata_parse_signature (MonoImage *image, guint32 token)
1704 {
1705 return mono_metadata_parse_signature_full (image, NULL, token);
1706 }
1707
1708 /*
1709 * mono_metadata_signature_alloc:
1710 * @image: metadata context
1711 * @nparmas: number of parameters in the signature
1712 *
1713 * Allocate a MonoMethodSignature structure with the specified number of params.
1714 * The return type and the params types need to be filled later.
1715 * This is a Mono runtime internal function.
1716 *
1717 * LOCKING: Assumes the loader lock is held.
1718 *
1719 * Returns: the new MonoMethodSignature structure.
1720 */
1721 MonoMethodSignature*
1722 mono_metadata_signature_alloc (MonoImage *m, guint32 nparams)
1723 {
1724 MonoMethodSignature *sig;
1725
1726 mono_loader_lock ();
1727 sig = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodSignature) + ((gint32)nparams - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType*));
1728 sig->param_count = nparams;
1729 sig->sentinelpos = -1;
1730 mono_loader_unlock ();
1731
1732 return sig;
1733 }
1734
1735 /*
1736 * mono_metadata_signature_dup:
1737 * @sig: method signature
1738 *
1739 * Duplicate an existing MonoMethodSignature so it can be modified.
1740 * This is a Mono runtime internal function.
1741 *
1742 * Returns: the new MonoMethodSignature structure.
1743 */
1744 MonoMethodSignature*
1745 mono_metadata_signature_dup (MonoMethodSignature *sig)
1746 {
1747 int sigsize;
1748
1749 sigsize = sizeof (MonoMethodSignature) + (sig->param_count - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType *);
1750 return g_memdup (sig, sigsize);
1751 }
1752
1753 /*
1754 * mono_metadata_parse_method_signature:
1755 * @m: metadata context
1756 * @generic_container: generics container
1757 * @def: the MethodDef index or 0 for Ref signatures.
1758 * @ptr: pointer to the signature metadata representation
1759 * @rptr: pointer updated to match the end of the decoded stream
1760 *
1761 * Decode a method signature stored at @ptr.
1762 * This is a Mono runtime internal function.
1763 *
1764 * LOCKING: Assumes the loader lock is held.
1765 *
1766 * Returns: a MonoMethodSignature describing the signature.
1767 */
1768 MonoMethodSignature *
1769 mono_metadata_parse_method_signature_full (MonoImage *m, MonoGenericContainer *container,
1770 int def, const char *ptr, const char **rptr)
1771 {
1772 MonoMethodSignature *method;
1773 int i, *pattrs = NULL;
1774 guint32 hasthis = 0, explicit_this = 0, call_convention, param_count;
1775 guint32 gen_param_count = 0;
1776 gboolean is_open = FALSE;
1777
1778 if (*ptr & 0x10)
1779 gen_param_count = 1;
1780 if (*ptr & 0x20)
1781 hasthis = 1;
1782 if (*ptr & 0x40)
1783 explicit_this = 1;
1784 call_convention = *ptr & 0x0F;
1785 ptr++;
1786 if (gen_param_count)
1787 gen_param_count = mono_metadata_decode_value (ptr, &ptr);
1788 param_count = mono_metadata_decode_value (ptr, &ptr);
1789
1790 if (def)
1791 pattrs = mono_metadata_get_param_attrs (m, def);
1792 method = mono_metadata_signature_alloc (m, param_count);
1793 method->hasthis = hasthis;
1794 method->explicit_this = explicit_this;
1795 method->call_convention = call_convention;
1796 method->generic_param_count = gen_param_count;
1797
1798 if (call_convention != 0xa) {
1799 method->ret = mono_metadata_parse_type_full (m, container, MONO_PARSE_RET, pattrs ? pattrs [0] : 0, ptr, &ptr);
1800 if (!method->ret) {
1801 mono_metadata_free_method_signature (method);
1802 g_free (pattrs);
1803 return NULL;
1804 }
1805 is_open = mono_class_is_open_constructed_type (method->ret);
1806 }
1807
1808 for (i = 0; i < method->param_count; ++i) {
1809 if (*ptr == MONO_TYPE_SENTINEL) {
1810 if (method->call_convention != MONO_CALL_VARARG || def)
1811 g_error ("found sentinel for methoddef or no vararg method");
1812 if (method->sentinelpos >= 0)
1813 g_error ("found sentinel twice in the same signature");
1814 method->sentinelpos = i;
1815 ptr++;
1816 }
1817 method->params [i] = mono_metadata_parse_type_full (m, container, MONO_PARSE_PARAM, pattrs ? pattrs [i+1] : 0, ptr, &ptr);
1818 if (!method->params [i]) {
1819 mono_metadata_free_method_signature (method);
1820 g_free (pattrs);
1821 return NULL;
1822 }
1823 if (!is_open)
1824 is_open = mono_class_is_open_constructed_type (method->params [i]);
1825 }
1826
1827 /* The sentinel could be missing if the caller does not pass any additional arguments */
1828 if (!def && method->call_convention == MONO_CALL_VARARG && method->sentinelpos < 0)
1829 method->sentinelpos = method->param_count;
1830
1831 method->has_type_parameters = is_open;
1832
1833 if (def && (method->call_convention == MONO_CALL_VARARG))
1834 method->sentinelpos = method->param_count;
1835
1836 g_free (pattrs);
1837
1838 if (rptr)
1839 *rptr = ptr;
1840 /*
1841 * Add signature to a cache and increase ref count...
1842 */
1843
1844 return method;
1845 }
1846
1847 /*
1848 * mono_metadata_parse_method_signature:
1849 * @m: metadata context
1850 * @def: the MethodDef index or 0 for Ref signatures.
1851 * @ptr: pointer to the signature metadata representation
1852 * @rptr: pointer updated to match the end of the decoded stream
1853 *
1854 * Decode a method signature stored at @ptr.
1855 * This is a Mono runtime internal function.
1856 *
1857 * LOCKING: Assumes the loader lock is held.
1858 *
1859 * Returns: a MonoMethodSignature describing the signature.
1860 */
1861 MonoMethodSignature *
1862 mono_metadata_parse_method_signature (MonoImage *m, int def, const char *ptr, const char **rptr)
1863 {
1864 return mono_metadata_parse_method_signature_full (m, NULL, def, ptr, rptr);
1865 }
1866
1867 /*
1868 * mono_metadata_free_method_signature:
1869 * @sig: signature to destroy
1870 *
1871 * Free the memory allocated in the signature @sig.
1872 * This method needs to be robust and work also on partially-built
1873 * signatures, so it does extra checks.
1874 */
1875 void
1876 mono_metadata_free_method_signature (MonoMethodSignature *sig)
1877 {
1878 int i;
1879 if (sig->ret)
1880 mono_metadata_free_type (sig->ret);
1881 for (i = 0; i < sig->param_count; ++i) {
1882 if (sig->params [i])
1883 mono_metadata_free_type (sig->params [i]);
1884 }
1885 }
1886
1887 /*
1888 * mono_metadata_lookup_generic_inst:
1889 *
1890 * Check whether the newly created generic instantiation @ginst already exists
1891 * in the cache and return the cached value in this case. Otherwise insert
1892 * it into the cache.
1893 *
1894 * Use this method each time you create a new `MonoGenericInst' to ensure
1895 * proper caching. Only use the returned value as the argument passed to this
1896 * method may be freed.
1897 *
1898 */
1899 MonoGenericInst *
1900 mono_metadata_lookup_generic_inst (MonoGenericInst *ginst)
1901 {
1902 MonoGenericInst *cached;
1903 int i;
1904
1905 cached = g_hash_table_lookup (generic_inst_cache, ginst);
1906 if (cached) {
1907 for (i = 0; i < ginst->type_argc; i++)
1908 mono_metadata_free_type (ginst->type_argv [i]);
1909 g_free (ginst->type_argv);
1910 g_free (ginst);
1911 return cached;
1912 }
1913
1914 ginst->id = ++next_generic_inst_id;
1915 g_hash_table_insert (generic_inst_cache, ginst, ginst);
1916
1917 return ginst;
1918 }
1919
1920 /*
1921 * mono_metadata_lookup_generic_class:
1922 *
1923 * Check whether the newly created generic class @gclass already exists
1924 * in the cache and return the cached value in this case. Otherwise insert
1925 * it into the cache and return NULL.
1926 *
1927 * Returns: the previosly cached generic class or NULL if it has been newly
1928 * inserted into the cache.
1929 *
1930 */
1931 MonoGenericClass *
1932 mono_metadata_lookup_generic_class (MonoGenericClass *gclass)
1933 {
1934 MonoGenericClass *cached;
1935
1936 cached = g_hash_table_lookup (generic_class_cache, gclass);
1937 if (cached)
1938 return cached;
1939
1940 g_hash_table_insert (generic_class_cache, gclass, gclass);
1941 return NULL;
1942 }
1943
1944 /*
1945 * mono_metadata_inflate_generic_inst:
1946 *
1947 * Instantiate the generic instance @ginst with the context @context.
1948 *
1949 */
1950 MonoGenericInst *
1951 mono_metadata_inflate_generic_inst (MonoGenericInst *ginst, MonoGenericContext *context)
1952 {
1953 MonoGenericInst *nginst;
1954 int i;
1955
1956 if (!ginst->is_open)
1957 return ginst;
1958
1959 nginst = g_new0 (MonoGenericInst, 1);
1960 nginst->type_argc = ginst->type_argc;
1961 nginst->type_argv = g_new0 (MonoType*, nginst->type_argc);
1962 nginst->is_reference = 1;
1963
1964 for (i = 0; i < nginst->type_argc; i++) {
1965 MonoType *t = mono_class_inflate_generic_type (ginst->type_argv [i], context);
1966
1967 if (!nginst->is_open)
1968 nginst->is_open = mono_class_is_open_constructed_type (t);
1969 if (nginst->is_reference)
1970 nginst->is_reference = MONO_TYPE_IS_REFERENCE (t);
1971
1972 nginst->type_argv [i] = t;
1973 }
1974
1975 return mono_metadata_lookup_generic_inst (nginst);
1976 }
1977
1978 MonoGenericInst *
1979 mono_metadata_parse_generic_inst (MonoImage *m, MonoGenericContainer *container,
1980 int count, const char *ptr, const char **rptr)
1981 {
1982 MonoGenericInst *ginst;
1983 int i;
1984
1985 ginst = g_new0 (MonoGenericInst, 1);
1986 ginst->type_argc = count;
1987 ginst->type_argv = g_new0 (MonoType*, count);
1988 ginst->is_reference = 1;
1989
1990 for (i = 0; i < ginst->type_argc; i++) {
1991 MonoType *t = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
1992
1993 if (!t) {
1994 g_free (ginst->type_argv);
1995 g_free (ginst);
1996 return NULL;
1997 }
1998 ginst->type_argv [i] = t;
1999 if (!ginst->is_open)
2000 ginst->is_open = mono_class_is_open_constructed_type (t);
2001 if (ginst->is_reference)
2002 ginst->is_reference = MONO_TYPE_IS_REFERENCE (t);
2003 }
2004
2005 if (rptr)
2006 *rptr = ptr;
2007
2008 return mono_metadata_lookup_generic_inst (ginst);
2009 }
2010
2011 static gboolean
2012 do_mono_metadata_parse_generic_class (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2013 const char *ptr, const char **rptr)
2014 {
2015 MonoGenericClass *gclass, *cached;
2016 MonoClass *gklass;
2017 MonoType *gtype;
2018 int count;
2019
2020 gclass = g_new0 (MonoGenericClass, 1);
2021
2022 type->data.generic_class = gclass;
2023
2024 gtype = mono_metadata_parse_type (m, MONO_PARSE_TYPE, 0, ptr, &ptr);
2025 if (gtype == NULL)
2026 return FALSE;
2027 gclass->container_class = gklass = mono_class_from_mono_type (gtype);
2028
2029 g_assert (gklass->generic_container);
2030
2031 count = mono_metadata_decode_value (ptr, &ptr);
2032
2033 gclass->inst = mono_metadata_parse_generic_inst (m, container, count, ptr, &ptr);
2034 /* FIXME: this hack is needed to handle the incestuous relationship between metadata parsing and MonoClass. */
2035 if (gclass->cached_context) {
2036 g_free (gclass->cached_context);
2037 gclass->cached_context = NULL;
2038 }
2039
2040 if (rptr)
2041 *rptr = ptr;
2042
2043 /* If we failed to parse, return, the error has been flagged. */
2044 if (gclass->inst == NULL)
2045 return FALSE;
2046
2047 /*
2048 * We may be called multiple times on different metadata to create the same
2049 * instantiated type. This happens for instance if we're part of a method or
2050 * local variable signature.
2051 *
2052 * It's important to return the same MonoGenericClass * for each particualar
2053 * instantiation of a generic type (ie "Stack<Int32>") to make static fields
2054 * work.
2055 *
2056 * According to the spec ($26.1.5), a static variable in a generic class
2057 * declaration is shared amongst all instances of the same closed constructed
2058 * type.
2059 */
2060
2061 cached = g_hash_table_lookup (generic_class_cache, gclass);
2062 if (cached) {
2063 g_free (gclass);
2064
2065 type->data.generic_class = cached;
2066 return TRUE;
2067 } else {
2068 g_hash_table_insert (generic_class_cache, gclass, gclass);
2069
2070 mono_stats.generic_instance_count++;
2071 mono_stats.generics_metadata_size += sizeof (MonoGenericClass) +
2072 sizeof (MonoGenericContext) +
2073 gclass->inst->type_argc * sizeof (MonoType);
2074 }
2075 return TRUE;
2076 }
2077
2078 /*
2079 * select_container:
2080 * @gc: The generic container to normalize
2081 * @type: The kind of generic parameters the resulting generic-container should contain
2082 */
2083
2084 static MonoGenericContainer *
2085 select_container (MonoGenericContainer *gc, MonoTypeEnum type)
2086 {
2087 gboolean is_var = (type == MONO_TYPE_VAR);
2088 if (!gc)
2089 return NULL;
2090
2091 g_assert (is_var || type == MONO_TYPE_MVAR);
2092
2093 if (is_var) {
2094 if (gc->is_method || gc->parent)
2095 /*
2096 * The current MonoGenericContainer is a generic method -> its `parent'
2097 * points to the containing class'es container.
2098 */
2099 return gc->parent;
2100 }
2101
2102 return gc;
2103 }
2104
2105 /*
2106 * mono_metadata_parse_generic_param:
2107 * @generic_container: Our MonoClass's or MonoMethodNormal's MonoGenericContainer;
2108 * see mono_metadata_parse_type_full() for details.
2109 * Internal routine to parse a generic type parameter.
2110 */
2111 static MonoGenericParam *
2112 mono_metadata_parse_generic_param (MonoImage *m, MonoGenericContainer *generic_container,
2113 MonoTypeEnum type, const char *ptr, const char **rptr)
2114 {
2115 int index = mono_metadata_decode_value (ptr, &ptr);
2116 if (rptr)
2117 *rptr = ptr;
2118
2119 generic_container = select_container (generic_container, type);
2120 if (!generic_container) {
2121 /* Create dummy MonoGenericParam */
2122 MonoGenericParam *param = g_new0 (MonoGenericParam, 1);
2123 param->name = g_strdup_printf ("%d", index);
2124 param->num = index;
2125
2126 return param;
2127 }
2128
2129 g_assert (index < generic_container->type_argc);
2130 return &generic_container->type_params [index];
2131 }
2132
2133 /*
2134 * do_mono_metadata_parse_type:
2135 * @type: MonoType to be filled in with the return value
2136 * @m: image context
2137 * @generic_context: generics_context
2138 * @ptr: pointer to the encoded type
2139 * @rptr: pointer where the end of the encoded type is saved
2140 *
2141 * Internal routine used to "fill" the contents of @type from an
2142 * allocated pointer. This is done this way to avoid doing too
2143 * many mini-allocations (particularly for the MonoFieldType which
2144 * most of the time is just a MonoType, but sometimes might be augmented).
2145 *
2146 * This routine is used by mono_metadata_parse_type and
2147 * mono_metadata_parse_field_type
2148 *
2149 * This extracts a Type as specified in Partition II (22.2.12)
2150 *
2151 * Returns: FALSE if the type could not be loaded
2152 */
2153 static gboolean
2154 do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2155 const char *ptr, const char **rptr)
2156 {
2157 gboolean ok = TRUE;
2158 type->type = mono_metadata_decode_value (ptr, &ptr);
2159
2160 switch (type->type){
2161 case MONO_TYPE_VOID:
2162 case MONO_TYPE_BOOLEAN:
2163 case MONO_TYPE_CHAR:
2164 case MONO_TYPE_I1:
2165 case MONO_TYPE_U1:
2166 case MONO_TYPE_I2:
2167 case MONO_TYPE_U2:
2168 case MONO_TYPE_I4:
2169 case MONO_TYPE_U4:
2170 case MONO_TYPE_I8:
2171 case MONO_TYPE_U8:
2172 case MONO_TYPE_R4:
2173 case MONO_TYPE_R8:
2174 case MONO_TYPE_I:
2175 case MONO_TYPE_U:
2176 case MONO_TYPE_STRING:
2177 case MONO_TYPE_OBJECT:
2178 case MONO_TYPE_TYPEDBYREF:
2179 break;
2180 case MONO_TYPE_VALUETYPE:
2181 case MONO_TYPE_CLASS: {
2182 guint32 token;
2183 token = mono_metadata_parse_typedef_or_ref (m, ptr, &ptr);
2184 type->data.klass = mono_class_get (m, token);
2185 if (!type->data.klass)
2186 return FALSE;
2187 break;
2188 }
2189 case MONO_TYPE_SZARRAY: {
2190 MonoType *etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2191 if (!etype)
2192 return FALSE;
2193 type->data.klass = mono_class_from_mono_type (etype);
2194 mono_metadata_free_type (etype);
2195 break;
2196 }
2197 case MONO_TYPE_PTR:
2198 type->data.type = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2199 if (!type->data.type)
2200 return FALSE;
2201 break;
2202 case MONO_TYPE_FNPTR:
2203 type->data.method = mono_metadata_parse_method_signature_full (m, container, 0, ptr, &ptr);
2204 break;
2205 case MONO_TYPE_ARRAY:
2206 type->data.array = mono_metadata_parse_array_full (m, container, ptr, &ptr);
2207 break;
2208 case MONO_TYPE_MVAR:
2209 case MONO_TYPE_VAR:
2210 type->data.generic_param = mono_metadata_parse_generic_param (m, container, type->type, ptr, &ptr);
2211 break;
2212 case MONO_TYPE_GENERICINST:
2213 ok = do_mono_metadata_parse_generic_class (type, m, container, ptr, &ptr);
2214 break;
2215 default:
2216 g_error ("type 0x%02x not handled in do_mono_metadata_parse_type", type->type);
2217 }
2218
2219 if (rptr)
2220 *rptr = ptr;
2221 return ok;
2222 }
2223
2224 /*
2225 * mono_metadata_free_type:
2226 * @type: type to free
2227 *
2228 * Free the memory allocated for type @type which is assumed to be created by
2229 * mono_metadata_parse_type ().
2230 */
2231 void
2232 mono_metadata_free_type (MonoType *type)
2233 {
2234 if (type >= builtin_types && type < builtin_types + NBUILTIN_TYPES ())
2235 return;
2236
2237 switch (type->type){
2238 case MONO_TYPE_OBJECT:
2239 case MONO_TYPE_STRING:
2240 if (!type->data.klass)
2241 break;
2242 /* fall through */
2243 case MONO_TYPE_CLASS:
2244 case MONO_TYPE_VALUETYPE:
2245 if (type == &type->data.klass->byval_arg || type == &type->data.klass->this_arg)
2246 return;
2247 break;
2248 case MONO_TYPE_PTR:
2249 mono_metadata_free_type (type->data.type);
2250 break;
2251 case MONO_TYPE_FNPTR:
2252 mono_metadata_free_method_signature (type->data.method);
2253 break;
2254 case MONO_TYPE_ARRAY:
2255 mono_metadata_free_array (type->data.array);
2256 break;
2257 }
2258
2259 /* Allocated from a mempool, no need to free it */
2260 }
2261
2262 #if 0
2263 static void
2264 hex_dump (const char *buffer, int base, int count)
2265 {
2266 int show_header = 1;
2267 int i;
2268
2269 if (count < 0){
2270 count = -count;
2271 show_header = 0;
2272 }
2273
2274 for (i = 0; i < count; i++){
2275 if (show_header)
2276 if ((i % 16) == 0)
2277 printf ("\n0x%08x: ", (unsigned char) base + i);
2278
2279 printf ("%02x ", (unsigned char) (buffer [i]));
2280 }
2281 fflush (stdout);
2282 }
2283 #endif
2284
2285 /**
2286 * @mh: The Method header
2287 * @ptr: Points to the beginning of the Section Data (25.3)
2288 */
2289 static void
2290 parse_section_data (MonoImage *m, MonoMethodHeader *mh, const unsigned char *ptr)
2291 {
2292 unsigned char sect_data_flags;
2293 const unsigned char *sptr;
2294 int is_fat;
2295 guint32 sect_data_len;
2296
2297 while (1) {
2298 /* align on 32-bit boundary */
2299 sptr = ptr = dword_align (ptr);
2300 sect_data_flags = *ptr;
2301 ptr++;
2302
2303 is_fat = sect_data_flags & METHOD_HEADER_SECTION_FAT_FORMAT;
2304 if (is_fat) {
2305 sect_data_len = (ptr [2] << 16) | (ptr [1] << 8) | ptr [0];
2306 ptr += 3;
2307 } else {
2308 sect_data_len = ptr [0];
2309 ++ptr;
2310 }
2311 /*
2312 g_print ("flags: %02x, len: %d\n", sect_data_flags, sect_data_len);
2313 hex_dump (sptr, 0, sect_data_len+8);
2314 g_print ("\nheader: ");
2315 hex_dump (sptr-4, 0, 4);
2316 g_print ("\n");
2317 */
2318
2319 if (sect_data_flags & METHOD_HEADER_SECTION_EHTABLE) {
2320 const unsigned char *p = dword_align (ptr);
2321 int i;
2322 mh->num_clauses = is_fat ? sect_data_len / 24: sect_data_len / 12;
2323 /* we could just store a pointer if we don't need to byteswap */
2324 mh->clauses = mono_mempool_alloc0 (m->mempool, sizeof (MonoExceptionClause) * mh->num_clauses);
2325 for (i = 0; i < mh->num_clauses; ++i) {
2326 MonoExceptionClause *ec = &mh->clauses [i];
2327 guint32 tof_value;
2328 if (is_fat) {
2329 ec->flags = read32 (p);
2330 ec->try_offset = read32 (p + 4);
2331 ec->try_len = read32 (p + 8);
2332 ec->handler_offset = read32 (p + 12);
2333 ec->handler_len = read32 (p + 16);
2334 tof_value = read32 (p + 20);
2335 p += 24;
2336 } else {
2337 ec->flags = read16 (p);
2338 ec->try_offset = read16 (p + 2);
2339 ec->try_len = *(p + 4);
2340 ec->handler_offset = read16 (p + 5);
2341 ec->handler_len = *(p + 7);
2342 tof_value = read32 (p + 8);
2343 p += 12;
2344 }
2345 if (ec->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2346 ec->data.filter_offset = tof_value;
2347 } else if (ec->flags == MONO_EXCEPTION_CLAUSE_NONE) {
2348 ec->data.catch_class = tof_value? mono_class_get (m, tof_value): 0;
2349 } else {
2350 ec->data.catch_class = NULL;
2351 }
2352 /* g_print ("try %d: %x %04x-%04x %04x\n", i, ec->flags, ec->try_offset, ec->try_offset+ec->try_len, ec->try_len); */
2353 }
2354
2355 }
2356 if (sect_data_flags & METHOD_HEADER_SECTION_MORE_SECTS)
2357 ptr += sect_data_len - 4; /* LAMESPEC: it seems the size includes the header */
2358 else
2359 return;
2360 }
2361 }
2362
2363 /*
2364 * mono_metadata_parse_mh_full:
2365 * @m: metadata context
2366 * @generic_context: generics context
2367 * @ptr: pointer to the method header.
2368 *
2369 * Decode the method header at @ptr, including pointer to the IL code,
2370 * info about local variables and optional exception tables.
2371 * This is a Mono runtime internal function.
2372 *
2373 * LOCKING: Assumes the loader lock is held.
2374 *
2375 * Returns: a MonoMethodHeader allocated from the image mempool.
2376 */
2377 MonoMethodHeader *
2378 mono_metadata_parse_mh_full (MonoImage *m, MonoGenericContainer *container, const char *ptr)
2379 {
2380 MonoMethodHeader *mh;
2381 unsigned char flags = *(const unsigned char *) ptr;
2382 unsigned char format = flags & METHOD_HEADER_FORMAT_MASK;
2383 guint16 fat_flags;
2384 guint32 local_var_sig_tok, max_stack, code_size, init_locals;
2385 const unsigned char *code;
2386 int hsize;
2387
2388 g_return_val_if_fail (ptr != NULL, NULL);
2389
2390 mono_loader_lock ();
2391 switch (format) {
2392 case METHOD_HEADER_TINY_FORMAT:
2393 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader));
2394 ptr++;
2395 mh->max_stack = 8;
2396 local_var_sig_tok = 0;
2397 mh->code_size = flags >> 2;
2398 mh->code = (unsigned char*)ptr;
2399 mono_loader_unlock ();
2400 return mh;
2401 case METHOD_HEADER_TINY_FORMAT1:
2402 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader));
2403 ptr++;
2404 mh->max_stack = 8;
2405 local_var_sig_tok = 0;
2406
2407 /*
2408 * The spec claims 3 bits, but the Beta2 is
2409 * incorrect
2410 */
2411 mh->code_size = flags >> 2;
2412 mh->code = (unsigned char*)ptr;
2413 mono_loader_unlock ();
2414 return mh;
2415 case METHOD_HEADER_FAT_FORMAT:
2416 fat_flags = read16 (ptr);
2417 ptr += 2;
2418 hsize = (fat_flags >> 12) & 0xf;
2419 max_stack = read16 (ptr);
2420 ptr += 2;
2421 code_size = read32 (ptr);
2422 ptr += 4;
2423 local_var_sig_tok = read32 (ptr);
2424 ptr += 4;
2425
2426 if (fat_flags & METHOD_HEADER_INIT_LOCALS)
2427 init_locals = 1;
2428 else
2429 init_locals = 0;
2430
2431 code = (unsigned char*)ptr;
2432
2433 if (!(fat_flags & METHOD_HEADER_MORE_SECTS))
2434 break;
2435
2436 /*
2437 * There are more sections
2438 */
2439 ptr = (char*)code + code_size;
2440 break;
2441 default:
2442 mono_loader_unlock ();
2443 return NULL;
2444 }
2445
2446 if (local_var_sig_tok) {
2447 MonoTableInfo *t = &m->tables [MONO_TABLE_STANDALONESIG];
2448 const char *locals_ptr;
2449 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
2450 int len=0, i, bsize;
2451
2452 mono_metadata_decode_row (t, (local_var_sig_tok & 0xffffff)-1, cols, 1);
2453 locals_ptr = mono_metadata_blob_heap (m, cols [MONO_STAND_ALONE_SIGNATURE]);
2454 bsize = mono_metadata_decode_blob_size (locals_ptr, &locals_ptr);
2455 if (*locals_ptr != 0x07)
2456 g_warning ("wrong signature for locals blob");
2457 locals_ptr++;
2458 len = mono_metadata_decode_value (locals_ptr, &locals_ptr);
2459 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader) + (len - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType*));
2460 mh->num_locals = len;
2461 for (i = 0; i < len; ++i) {
2462 mh->locals [i] = mono_metadata_parse_type_full (
2463 m, container, MONO_PARSE_LOCAL, 0, locals_ptr, &locals_ptr);
2464 if (!mh->locals [i]) {
2465 mono_loader_unlock ();
2466 return NULL;
2467 }
2468 }
2469 } else {
2470 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader));
2471 }
2472 mh->code = code;
2473 mh->code_size = code_size;
2474 mh->max_stack = max_stack;
2475 mh->init_locals = init_locals;
2476 if (fat_flags & METHOD_HEADER_MORE_SECTS)
2477 parse_section_data (m, mh, (const unsigned char*)ptr);
2478 mono_loader_unlock ();
2479 return mh;
2480 }
2481
2482 /*
2483 * mono_metadata_parse_mh:
2484 * @generic_context: generics context
2485 * @ptr: pointer to the method header.
2486 *
2487 * Decode the method header at @ptr, including pointer to the IL code,
2488 * info about local variables and optional exception tables.
2489 * This is a Mono runtime internal function.
2490 *
2491 * Returns: a MonoMethodHeader.
2492 */
2493 MonoMethodHeader *
2494 mono_metadata_parse_mh (MonoImage *m, const char *ptr)
2495 {
2496 MonoMethodHeader *res;
2497
2498 mono_loader_lock ();
2499
2500 res = mono_metadata_parse_mh_full (m, NULL, ptr);
2501
2502 mono_loader_unlock ();
2503
2504 return res;
2505 }
2506
2507 /*
2508 * mono_metadata_free_mh:
2509 * @mh: a method header
2510 *
2511 * Free the memory allocated for the method header.
2512 * This is a Mono runtime internal function.
2513 */
2514 void
2515 mono_metadata_free_mh (MonoMethodHeader *mh)
2516 {
2517 /* Allocated from the mempool */
2518 }
2519
2520 /*
2521 * mono_method_header_get_code:
2522 * @header: a MonoMethodHeader pointer
2523 * @code_size: memory location for returning the code size
2524 * @max_stack: memory location for returning the max stack
2525 *
2526 * Method header accessor to retreive info about the IL code properties:
2527 * a pointer to the IL code itself, the size of the code and the max number
2528 * of stack slots used by the code.
2529 *
2530 * Returns: pointer to the IL code represented by the method header.
2531 */
2532 const unsigned char*
2533 mono_method_header_get_code (MonoMethodHeader *header, guint32* code_size, guint32* max_stack)
2534 {
2535 if (code_size)
2536 *code_size = header->code_size;
2537 if (max_stack)
2538 *max_stack = header->max_stack;
2539 return header->code;
2540 }
2541
2542 /*
2543 * mono_method_header_get_locals:
2544 * @header: a MonoMethodHeader pointer
2545 * @num_locals: memory location for returning the number of local variables
2546 * @init_locals: memory location for returning the init_locals flag
2547 *
2548 * Method header accessor to retreive info about the local variables:
2549 * an array of local types, the number of locals and whether the locals
2550 * are supposed to be initialized to 0 on method entry
2551 *
2552 * Returns: pointer to an array of types of the local variables
2553 */
2554 MonoType**
2555 mono_method_header_get_locals (MonoMethodHeader *header, guint32* num_locals, gboolean *init_locals)
2556 {
2557 if (num_locals)
2558 *num_locals = header->num_locals;
2559 if (init_locals)
2560 *init_locals = header->init_locals;
2561 return header->locals;
2562 }
2563
2564 /*
2565 * mono_method_header_get_num_clauses:
2566 * @header: a MonoMethodHeader pointer
2567 *
2568 * Method header accessor to retreive the number of exception clauses.
2569 *
2570 * Returns: the number of exception clauses present
2571 */
2572 int
2573 mono_method_header_get_num_clauses (MonoMethodHeader *header)
2574 {
2575 return header->num_clauses;
2576 }
2577
2578 /*
2579 * mono_method_header_get_clauses:
2580 * @header: a MonoMethodHeader pointer
2581 * @method: MonoMethod the header belongs to
2582 * @iter: pointer to a iterator
2583 * @clause: pointer to a MonoExceptionClause structure which will be filled with the info
2584 *
2585 * Get the info about the exception clauses in the method. Set *iter to NULL to
2586 * initiate the iteration, then call the method repeatedly until it returns FALSE.
2587 * At each iteration, the structure pointed to by clause if filled with the
2588 * exception clause information.
2589 *
2590 * Returns: TRUE if clause was filled with info, FALSE if there are no more exception
2591 * clauses.
2592 */
2593 int
2594 mono_method_header_get_clauses (MonoMethodHeader *header, MonoMethod *method, gpointer *iter, MonoExceptionClause *clause)
2595 {
2596 MonoExceptionClause *sc;
2597 /* later we'll be able to use this interface to parse the clause info on demand,
2598 * without allocating anything.
2599 */
2600 if (!iter || !header->num_clauses)
2601 return FALSE;
2602 if (!*iter) {
2603 *iter = sc = header->clauses;
2604 *clause = *sc;
2605 return TRUE;
2606 }
2607 sc = *iter;
2608 sc++;
2609 if (sc < header->clauses + header->num_clauses) {
2610 *iter = sc;
2611 *clause = *sc;
2612 return TRUE;
2613 }
2614 return FALSE;
2615 }
2616
2617 /**
2618 * mono_metadata_parse_field_type:
2619 * @m: metadata context to extract information from
2620 * @ptr: pointer to the field signature
2621 * @rptr: pointer updated to match the end of the decoded stream
2622 *
2623 * Parses the field signature, and returns the type information for it.
2624 *
2625 * Returns: The MonoType that was extracted from @ptr.
2626 */
2627 MonoType *
2628 mono_metadata_parse_field_type (MonoImage *m, short field_flags, const char *ptr, const char **rptr)
2629 {
2630 return mono_metadata_parse_type (m, MONO_PARSE_FIELD, field_flags, ptr, rptr);
2631 }
2632
2633 /**
2634 * mono_metadata_parse_param:
2635 * @m: metadata context to extract information from
2636 * @ptr: pointer to the param signature
2637 * @rptr: pointer updated to match the end of the decoded stream
2638 *
2639 * Parses the param signature, and returns the type information for it.
2640 *
2641 * Returns: The MonoType that was extracted from @ptr.
2642 */
2643 MonoType *
2644 mono_metadata_parse_param (MonoImage *m, const char *ptr, const char **rptr)
2645 {
2646 return mono_metadata_parse_type (m, MONO_PARSE_PARAM, 0, ptr, rptr);
2647 }
2648
2649 /*
2650 * mono_metadata_token_from_dor:
2651 * @dor_token: A TypeDefOrRef coded index
2652 *
2653 * dor_token is a TypeDefOrRef coded index: it contains either
2654 * a TypeDef, TypeRef or TypeSpec in the lower bits, and the upper
2655 * bits contain an index into the table.
2656 *
2657 * Returns: an expanded token
2658 */
2659 guint32
2660 mono_metadata_token_from_dor (guint32 dor_index)
2661 {
2662 guint32 table, idx;
2663
2664 table = dor_index & 0x03;
2665 idx = dor_index >> 2;
2666
2667 switch (table){
2668 case 0: /* TypeDef */
2669 return MONO_TOKEN_TYPE_DEF | idx;
2670 case 1: /* TypeRef */
2671 return MONO_TOKEN_TYPE_REF | idx;
2672 case 2: /* TypeSpec */
2673 return MONO_TOKEN_TYPE_SPEC | idx;
2674 default:
2675 g_assert_not_reached ();
2676 }
2677
2678 return 0;
2679 }
2680
2681 /*
2682 * We use this to pass context information to the row locator
2683 */
2684 typedef struct {
2685 int idx; /* The index that we are trying to locate */
2686 int col_idx; /* The index in the row where idx may be stored */
2687 MonoTableInfo *t; /* pointer to the table */
2688 guint32 result;
2689 } locator_t;
2690
2691 /*
2692 * How the row locator works.
2693 *
2694 * Table A
2695 * ___|___
2696 * ___|___ Table B
2697 * ___|___------> _______
2698 * ___|___ _______
2699 *
2700 * A column in the rows of table A references an index in table B.
2701 * For example A may be the TYPEDEF table and B the METHODDEF table.
2702 *
2703 * Given an index in table B we want to get the row in table A
2704 * where the column n references our index in B.
2705 *
2706 * In the locator_t structure:
2707 * t is table A
2708 * col_idx is the column number
2709 * index is the index in table B
2710 * result will be the index in table A
2711 *
2712 * Examples:
2713 * Table A Table B column (in table A)
2714 * TYPEDEF METHODDEF MONO_TYPEDEF_METHOD_LIST
2715 * TYPEDEF FIELD MONO_TYPEDEF_FIELD_LIST
2716 * PROPERTYMAP PROPERTY MONO_PROPERTY_MAP_PROPERTY_LIST
2717 * INTERFIMPL TYPEDEF MONO_INTERFACEIMPL_CLASS
2718 * METHODSEM PROPERTY ASSOCIATION (encoded index)
2719 *
2720 * Note that we still don't support encoded indexes.
2721 *
2722 */
2723 static int
2724 typedef_locator (const void *a, const void *b)
2725 {
2726 locator_t *loc = (locator_t *) a;
2727 const char *bb = (const char *) b;
2728 int typedef_index = (bb - loc->t->base) / loc->t->row_size;
2729 guint32 col, col_next;
2730
2731 col = mono_metadata_decode_row_col (loc->t, typedef_index, loc->col_idx);
2732
2733 if (loc->idx < col)
2734 return -1;
2735
2736 /*
2737 * Need to check that the next row is valid.
2738 */
2739 if (typedef_index + 1 < loc->t->rows) {
2740 col_next = mono_metadata_decode_row_col (loc->t, typedef_index + 1, loc->col_idx);
2741 if (loc->idx >= col_next)
2742 return 1;
2743
2744 if (col == col_next)
2745 return 1;
2746 }
2747
2748 loc->result = typedef_index;
2749
2750 return 0;
2751 }
2752
2753 static int
2754 table_locator (const void *a, const void *b)
2755 {
2756 locator_t *loc = (locator_t *) a;
2757 const char *bb = (const char *) b;
2758 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
2759 guint32 col;
2760
2761 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
2762
2763 if (loc->idx == col) {
2764 loc->result = table_index;
2765 return 0;
2766 }
2767 if (loc->idx < col)
2768 return -1;
2769 else
2770 return 1;
2771 }
2772
2773 static int
2774 declsec_locator (const void *a, const void *b)
2775 {
2776 locator_t *loc = (locator_t *) a;
2777 const char *bb = (const char *) b;
2778 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
2779 guint32 col;
2780
2781 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
2782
2783 if (loc->idx == col) {
2784 loc->result = table_index;
2785 return 0;
2786 }
2787 if (loc->idx < col)
2788 return -1;
2789 else
2790 return 1;
2791 }
2792
2793 /**
2794 * search_ptr_table:
2795 *
2796 * Return the 1-based row index in TABLE, which must be one of the *Ptr tables,
2797 * which contains IDX.
2798 */
2799 static guint32
2800 search_ptr_table (MonoImage *image, int table, int idx)
2801 {
2802 MonoTableInfo *ptrdef = &image->tables [table];
2803 int i;
2804
2805 /* Use a linear search to find our index in the table */
2806 for (i = 0; i < ptrdef->rows; i ++)
2807 /* All the Ptr tables have the same structure */
2808 if (mono_metadata_decode_row_col (ptrdef, i, 0) == idx)
2809 break;
2810
2811 if (i < ptrdef->rows)
2812 return i + 1;
2813 else
2814 return idx;
2815 }
2816
2817 /**
2818 * mono_metadata_typedef_from_field:
2819 * @meta: metadata context
2820 * @index: FieldDef token
2821 *
2822 * Returns: the 1-based index into the TypeDef table of the type that
2823 * declared the field described by @index, or 0 if not found.
2824 */
2825 guint32
2826 mono_metadata_typedef_from_field (MonoImage *meta, guint32 index)
2827 {
2828 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
2829 locator_t loc;
2830
2831 if (!tdef->base)
2832 return 0;
2833
2834 loc.idx = mono_metadata_token_index (index);
2835 loc.col_idx = MONO_TYPEDEF_FIELD_LIST;
2836 loc.t = tdef;
2837
2838 if (meta->uncompressed_metadata)
2839 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
2840
2841 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
2842 g_assert_not_reached ();
2843
2844 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
2845 return loc.result + 1;
2846 }
2847
2848 /*
2849 * mono_metadata_typedef_from_method:
2850 * @meta: metadata context
2851 * @index: MethodDef token
2852 *
2853 * Returns: the 1-based index into the TypeDef table of the type that
2854 * declared the method described by @index. 0 if not found.
2855 */
2856 guint32
2857 mono_metadata_typedef_from_method (MonoImage *meta, guint32 index)
2858 {
2859 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
2860 locator_t loc;
2861
2862 if (!tdef->base)
2863 return 0;
2864
2865 loc.idx = mono_metadata_token_index (index);
2866 loc.col_idx = MONO_TYPEDEF_METHOD_LIST;
2867 loc.t = tdef;
2868
2869 if (meta->uncompressed_metadata)
2870 loc.idx = search_ptr_table (meta, MONO_TABLE_METHOD_POINTER, loc.idx);
2871
2872 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
2873 g_assert_not_reached ();
2874
2875 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
2876 return loc.result + 1;
2877 }
2878
2879 /*
2880 * mono_metadata_interfaces_from_typedef_full:
2881 * @meta: metadata context
2882 * @index: typedef token
2883 *
2884 * The array of interfaces that the @index typedef token implements is returned in
2885 * @interfaces. The number of elemnts in the array is returned in @count.
2886 *
2887 * LOCKING: Assumes the loader lock is held.
2888 *
2889 * Returns: TRUE on success, FALSE on failure.
2890 */
2891 gboolean
2892 mono_metadata_interfaces_from_typedef_full (MonoImage *meta, guint32 index, MonoClass ***interfaces, guint *count, MonoGenericContext *context)
2893 {
2894 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_INTERFACEIMPL];
2895 locator_t loc;
2896 guint32 start, pos;
2897 guint32 cols [MONO_INTERFACEIMPL_SIZE];
2898 MonoClass **result;
2899
2900 *interfaces = NULL;
2901 *count = 0;
2902
2903 if (!tdef->base)
2904 return TRUE;
2905
2906 loc.idx = mono_metadata_token_index (index);
2907 loc.col_idx = MONO_INTERFACEIMPL_CLASS;
2908 loc.t = tdef;
2909
2910 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
2911 return TRUE;
2912
2913 start = loc.result;
2914 /*
2915 * We may end up in the middle of the rows...
2916 */
2917 while (start > 0) {
2918 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_INTERFACEIMPL_CLASS))
2919 start--;
2920 else
2921 break;
2922 }
2923 pos = start;
2924 while (pos < tdef->rows) {
2925 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
2926 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
2927 break;
2928 ++pos;
2929 }
2930
2931 mono_loader_lock ();
2932 result = mono_mempool_alloc0 (meta->mempool, sizeof (MonoClass*) * (pos - start));
2933 mono_loader_unlock ();
2934
2935 pos = start;
2936 while (pos < tdef->rows) {
2937 MonoClass *iface;
2938
2939 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
2940 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
2941 break;
2942 iface = mono_class_get_full (
2943 meta, mono_metadata_token_from_dor (cols [MONO_INTERFACEIMPL_INTERFACE]), context);
2944 if (iface == NULL)
2945 return FALSE;
2946 result [pos - start] = iface;
2947 ++pos;
2948 }
2949 *count = pos - start;
2950 *interfaces = result;
2951 return TRUE;
2952 }
2953
2954 MonoClass**
2955 mono_metadata_interfaces_from_typedef (MonoImage *meta, guint32 index, guint *count)
2956 {
2957 MonoClass **interfaces;
2958 gboolean rv;
2959
2960 mono_loader_lock ();
2961 rv = mono_metadata_interfaces_from_typedef_full (meta, index, &interfaces, count, NULL);
2962 mono_loader_unlock ();
2963 if (rv)
2964 return interfaces;
2965 else
2966 return NULL;
2967 }
2968
2969 /*
2970 * mono_metadata_nested_in_typedef:
2971 * @meta: metadata context
2972 * @index: typedef token
2973 *
2974 * Returns: the 1-based index into the TypeDef table of the type
2975 * where the type described by @index is nested.
2976 * Retruns 0 if @index describes a non-nested type.
2977 */
2978 guint32
2979 mono_metadata_nested_in_typedef (MonoImage *meta, guint32 index)
2980 {
2981 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
2982 locator_t loc;
2983
2984 if (!tdef->base)
2985 return 0;
2986
2987 loc.idx = mono_metadata_token_index (index);
2988 loc.col_idx = MONO_NESTED_CLASS_NESTED;
2989 loc.t = tdef;
2990
2991 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
2992 return 0;
2993
2994 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
2995 return mono_metadata_decode_row_col (tdef, loc.result, MONO_NESTED_CLASS_ENCLOSING) | MONO_TOKEN_TYPE_DEF;
2996 }
2997
2998 /*
2999 * mono_metadata_nesting_typedef:
3000 * @meta: metadata context
3001 * @index: typedef token
3002 *
3003 * Returns: the 1-based index into the TypeDef table of the first type
3004 * that is nested inside the type described by @index. The search starts at
3005 * @start_index. returns 0 if no such type is found.
3006 */
3007 guint32
3008 mono_metadata_nesting_typedef (MonoImage *meta, guint32 index, guint32 start_index)
3009 {
3010 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
3011 guint32 start;
3012 guint32 class_index = mono_metadata_token_index (index);
3013
3014 if (!tdef->base)
3015 return 0;
3016
3017 start = start_index;
3018
3019 while (start <= tdef->rows) {
3020 if (class_index == mono_metadata_decode_row_col (tdef, start - 1, MONO_NESTED_CLASS_ENCLOSING))
3021 break;
3022 else
3023 start++;
3024 }
3025
3026 if (start > tdef->rows)
3027 return 0;
3028 else
3029 return start;
3030 }
3031
3032 /*
3033 * mono_metadata_packing_from_typedef:
3034 * @meta: metadata context
3035 * @index: token representing a type
3036 *
3037 * Returns: the info stored in the ClassLAyout table for the given typedef token
3038 * into the @packing and @size pointers.
3039 * Returns 0 if the info is not found.
3040 */
3041 guint32
3042 mono_metadata_packing_from_typedef (MonoImage *meta, guint32 index, guint32 *packing, guint32 *size)
3043 {
3044 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CLASSLAYOUT];
3045 locator_t loc;
3046 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
3047
3048 if (!tdef->base)
3049 return 0;
3050
3051 loc.idx = mono_metadata_token_index (index);
3052 loc.col_idx = MONO_CLASS_LAYOUT_PARENT;
3053 loc.t = tdef;
3054
3055 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3056 return 0;
3057
3058 mono_metadata_decode_row (tdef, loc.result, cols, MONO_CLASS_LAYOUT_SIZE);
3059 if (packing)
3060 *packing = cols [MONO_CLASS_LAYOUT_PACKING_SIZE];
3061 if (size)
3062 *size = cols [MONO_CLASS_LAYOUT_CLASS_SIZE];
3063
3064 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3065 return loc.result + 1;
3066 }
3067
3068 /*
3069 * mono_metadata_custom_attrs_from_index:
3070 * @meta: metadata context
3071 * @index: token representing the parent
3072 *
3073 * Returns: the 1-based index into the CustomAttribute table of the first
3074 * attribute which belongs to the metadata object described by @index.
3075 * Returns 0 if no such attribute is found.
3076 */
3077 guint32
3078 mono_metadata_custom_attrs_from_index (MonoImage *meta, guint32 index)
3079 {
3080 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CUSTOMATTRIBUTE];
3081 locator_t loc;
3082
3083 if (!tdef->base)
3084 return 0;
3085
3086 loc.idx = index;
3087 loc.col_idx = MONO_CUSTOM_ATTR_PARENT;
3088 loc.t = tdef;
3089
3090 /* FIXME: Index translation */
3091
3092 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3093 return 0;
3094
3095 /* Find the first entry by searching backwards */
3096 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_CUSTOM_ATTR_PARENT) == index))
3097 loc.result --;
3098
3099 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3100 return loc.result + 1;
3101 }
3102
3103 /*
3104 * mono_metadata_declsec_from_index:
3105 * @meta: metadata context
3106 * @index: token representing the parent
3107 *
3108 * Returns: the 0-based index into the DeclarativeSecurity table of the first
3109 * attribute which belongs to the metadata object described by @index.
3110 * Returns -1 if no such attribute is found.
3111 */
3112 guint32
3113 mono_metadata_declsec_from_index (MonoImage *meta, guint32 index)
3114 {
3115 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_DECLSECURITY];
3116 locator_t loc;
3117
3118 if (!tdef->base)
3119 return -1;
3120
3121 loc.idx = index;
3122 loc.col_idx = MONO_DECL_SECURITY_PARENT;
3123 loc.t = tdef;
3124
3125 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, declsec_locator))
3126 return -1;
3127
3128 /* Find the first entry by searching backwards */
3129 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_DECL_SECURITY_PARENT) == index))
3130 loc.result --;
3131
3132 return loc.result;
3133 }
3134
3135 #ifdef DEBUG
3136 static void
3137 mono_backtrace (int limit)
3138 {
3139 void *array[limit];
3140 char **names;
3141 int i;
3142 backtrace (array, limit);
3143 names = backtrace_symbols (array, limit);
3144 for (i =0; i < limit; ++i) {
3145 g_print ("\t%s\n", names [i]);
3146 }
3147 g_free (names);
3148 }
3149 #endif
3150
3151 #ifndef __GNUC__
3152 /*#define __alignof__(a) sizeof(a)*/
3153 #define __alignof__(type) G_STRUCT_OFFSET(struct { char c; type x; }, x)
3154 #endif
3155
3156 /*
3157 * mono_type_size:
3158 * @t: the type to return the size of
3159 *
3160 * Returns: the number of bytes required to hold an instance of this
3161 * type in memory
3162 */
3163 int
3164 mono_type_size (MonoType *t, int *align)
3165 {
3166 if (!t) {
3167 *align = 1;
3168 return 0;
3169 }
3170 if (t->byref) {
3171 *align = __alignof__(gpointer);
3172 return sizeof (gpointer);
3173 }
3174
3175 switch (t->type){
3176 case MONO_TYPE_VOID:
3177 *align = 1;
3178 return 0;
3179 case MONO_TYPE_BOOLEAN:
3180 *align = __alignof__(gint8);
3181 return 1;
3182 case MONO_TYPE_I1:
3183 case MONO_TYPE_U1:
3184 *align = __alignof__(gint8);
3185 return 1;
3186 case MONO_TYPE_CHAR:
3187 case MONO_TYPE_I2:
3188 case MONO_TYPE_U2:
3189 *align = __alignof__(gint16);
3190 return 2;
3191 case MONO_TYPE_I4:
3192 case MONO_TYPE_U4:
3193 *align = __alignof__(gint32);
3194 return 4;
3195 case MONO_TYPE_R4:
3196 *align = __alignof__(float);
3197 return 4;
3198 case MONO_TYPE_I8:
3199 case MONO_TYPE_U8:
3200 *align = __alignof__(gint64);
3201 return 8;
3202 case MONO_TYPE_R8:
3203 *align = __alignof__(double);
3204 return 8;
3205 case MONO_TYPE_I:
3206 case MONO_TYPE_U:
3207 *align = __alignof__(gpointer);
3208 return sizeof (gpointer);
3209 case MONO_TYPE_STRING:
3210 *align = __alignof__(gpointer);
3211 return sizeof (gpointer);
3212 case MONO_TYPE_OBJECT:
3213 *align = __alignof__(gpointer);
3214 return sizeof (gpointer);
3215 case MONO_TYPE_VALUETYPE: {
3216 if (t->data.klass->enumtype)
3217 return mono_type_size (t->data.klass->enum_basetype, align);
3218 else
3219 return mono_class_value_size (t->data.klass, (guint32*)align);
3220 }
3221 case MONO_TYPE_CLASS:
3222 case MONO_TYPE_SZARRAY:
3223 case MONO_TYPE_PTR:
3224 case MONO_TYPE_FNPTR:
3225 case MONO_TYPE_ARRAY:
3226 *align = __alignof__(gpointer);
3227 return sizeof (gpointer);
3228 case MONO_TYPE_TYPEDBYREF:
3229 return mono_class_value_size (mono_defaults.typed_reference_class, (guint32*)align);
3230 case MONO_TYPE_GENERICINST: {
3231 MonoGenericClass *gclass = t->data.generic_class;
3232 MonoClass *container_class = gclass->container_class;
3233
3234 // g_assert (!gclass->inst->is_open);
3235
3236 if (container_class->valuetype) {
3237 if (container_class->enumtype)
3238 return mono_type_size (container_class->enum_basetype, align);
3239 else
3240 return mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
3241 } else {
3242 *align = __alignof__(gpointer);
3243 return sizeof (gpointer);
3244 }
3245 }
3246 case MONO_TYPE_VAR:
3247 case MONO_TYPE_MVAR:
3248 /* FIXME: Martin, this is wrong. */
3249 *align = __alignof__(gpointer);
3250 return sizeof (gpointer);
3251 default:
3252 g_error ("mono_type_size: type 0x%02x unknown", t->type);
3253 }
3254 return 0;
3255 }
3256
3257 /*
3258 * mono_type_stack_size:
3259 * @t: the type to return the size it uses on the stack
3260 *
3261 * Returns: the number of bytes required to hold an instance of this
3262 * type on the runtime stack
3263 */
3264 int
3265 mono_type_stack_size (MonoType *t, int *align)
3266 {
3267 int tmp;
3268
3269 g_assert (t != NULL);
3270
3271 if (!align)
3272 align = &tmp;
3273
3274 if (t->byref) {
3275 *align = __alignof__(gpointer);
3276 return sizeof (gpointer);
3277 }
3278
3279 switch (t->type){
3280 case MONO_TYPE_BOOLEAN:
3281 case MONO_TYPE_CHAR:
3282 case MONO_TYPE_I1:
3283 case MONO_TYPE_U1:
3284 case MONO_TYPE_I2:
3285 case MONO_TYPE_U2:
3286 case MONO_TYPE_I4:
3287 case MONO_TYPE_U4:
3288 case MONO_TYPE_I:
3289 case MONO_TYPE_U:
3290 case MONO_TYPE_STRING:
3291 case MONO_TYPE_OBJECT:
3292 case MONO_TYPE_CLASS:
3293 case MONO_TYPE_SZARRAY:
3294 case MONO_TYPE_PTR:
3295 case MONO_TYPE_FNPTR:
3296 case MONO_TYPE_ARRAY:
3297 *align = __alignof__(gpointer);
3298 return sizeof (gpointer);
3299 case MONO_TYPE_TYPEDBYREF:
3300 *align = __alignof__(gpointer);
3301 return sizeof (gpointer) * 3;
3302 case MONO_TYPE_R4:
3303 *align = __alignof__(float);
3304 return sizeof (float);
3305 case MONO_TYPE_I8:
3306 case MONO_TYPE_U8:
3307 *align = __alignof__(gint64);
3308 return sizeof (gint64);
3309 case MONO_TYPE_R8:
3310 *align = __alignof__(double);
3311 return sizeof (double);
3312 case MONO_TYPE_VALUETYPE: {
3313 guint32 size;
3314
3315 if (t->data.klass->enumtype)
3316 return mono_type_stack_size (t->data.klass->enum_basetype, align);
3317 else {
3318 size = mono_class_value_size (t->data.klass, (guint32*)align);
3319
3320 *align = *align + __alignof__(gpointer) - 1;
3321 *align &= ~(__alignof__(gpointer) - 1);
3322
3323 size += sizeof (gpointer) - 1;
3324 size &= ~(sizeof (gpointer) - 1);
3325
3326 return size;
3327 }
3328 }
3329 case MONO_TYPE_GENERICINST: {
3330 MonoGenericClass *gclass = t->data.generic_class;
3331 MonoClass *container_class = gclass->container_class;
3332
3333 g_assert (!gclass->inst->is_open);
3334
3335 if (container_class->valuetype) {
3336 if (container_class->enumtype)
3337 return mono_type_stack_size (container_class->enum_basetype, align);
3338 else {
3339 guint32 size = mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
3340
3341 *align = *align + __alignof__(gpointer) - 1;
3342 *align &= ~(__alignof__(gpointer) - 1);
3343
3344 size += sizeof (gpointer) - 1;
3345 size &= ~(sizeof (gpointer) - 1);
3346
3347 return size;
3348 }
3349 } else {
3350 *align = __alignof__(gpointer);
3351 return sizeof (gpointer);
3352 }
3353 }
3354 default:
3355 g_error ("type 0x%02x unknown", t->type);
3356 }
3357 return 0;
3358 }
3359
3360 gboolean
3361 mono_type_generic_inst_is_valuetype (MonoType *type)
3362 {
3363 g_assert (type->type == MONO_TYPE_GENERICINST);
3364 return type->data.generic_class->container_class->valuetype;
3365 }
3366
3367 gboolean
3368 mono_metadata_generic_class_is_valuetype (MonoGenericClass *gclass)
3369 {
3370 return gclass->container_class->valuetype;
3371 }
3372
3373 static gboolean
3374 _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2, gboolean signature_only)
3375 {
3376 int i;
3377
3378 if ((g1->inst->type_argc != g2->inst->type_argc) || (g1->is_dynamic != g2->is_dynamic) ||
3379 (g1->inst->is_reference != g2->inst->is_reference))
3380 return FALSE;
3381 if (!mono_metadata_class_equal (g1->container_class, g2->container_class, signature_only))
3382 return FALSE;
3383 for (i = 0; i < g1->inst->type_argc; ++i) {
3384 if (!do_mono_metadata_type_equal (g1->inst->type_argv [i], g2->inst->type_argv [i], signature_only))
3385 return FALSE;
3386 }
3387 return TRUE;
3388 }
3389
3390 guint
3391 mono_metadata_generic_method_hash (MonoGenericMethod *gmethod)
3392 {
3393 return gmethod->inst->id;
3394 }
3395
3396 gboolean
3397 mono_metadata_generic_method_equal (MonoGenericMethod *g1, MonoGenericMethod *g2)
3398 {
3399 return (g1->container == g2->container) && (g1->class_inst == g2->class_inst) &&
3400 (g1->inst == g2->inst);
3401 }
3402
3403
3404 /*
3405 * mono_metadata_type_hash:
3406 * @t1: a type
3407 *
3408 * Computes an hash value for @t1 to be used in GHashTable.
3409 */
3410 guint
3411 mono_metadata_type_hash (MonoType *t1)
3412 {
3413 guint hash = t1->type;
3414
3415 hash |= t1->byref << 6; /* do not collide with t1->type values */
3416 switch (t1->type) {
3417 case MONO_TYPE_VALUETYPE:
3418 case MONO_TYPE_CLASS:
3419 case MONO_TYPE_SZARRAY:
3420 /* check if the distribution is good enough */
3421 return ((hash << 5) - hash) ^ g_str_hash (t1->data.klass->name);
3422 case MONO_TYPE_PTR:
3423 return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
3424 case MONO_TYPE_ARRAY:
3425 return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
3426 case MONO_TYPE_GENERICINST:
3427 return ((hash << 5) - hash) ^ mono_generic_class_hash (t1->data.generic_class);
3428 }
3429 return hash;
3430 }
3431
3432 static gboolean
3433 mono_metadata_generic_param_equal (MonoGenericParam *p1, MonoGenericParam *p2, gboolean signature_only)
3434 {
3435 if (p1 == p2)
3436 return TRUE;
3437 if (p1->num != p2->num)
3438 return FALSE;
3439
3440 if (p1->owner == p2->owner)
3441 return TRUE;
3442
3443 /*
3444 * If `signature_only' is true, we're comparing two (method) signatures.
3445 * In this case, the owner of two type parameters doesn't need to match.
3446 */
3447
3448 return signature_only;
3449 }
3450
3451 static gboolean
3452 mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only)
3453 {
3454 if (c1 == c2)
3455 return TRUE;
3456 if (c1->generic_class && c2->generic_class)
3457 return _mono_metadata_generic_class_equal (c1->generic_class, c2->generic_class, signature_only);
3458 if ((c1->byval_arg.type == MONO_TYPE_VAR) && (c2->byval_arg.type == MONO_TYPE_VAR))
3459 return mono_metadata_generic_param_equal (
3460 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
3461 if ((c1->byval_arg.type == MONO_TYPE_MVAR) && (c2->byval_arg.type == MONO_TYPE_MVAR))
3462 return mono_metadata_generic_param_equal (
3463 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
3464 if (signature_only &&
3465 (c1->byval_arg.type == MONO_TYPE_SZARRAY) && (c2->byval_arg.type == MONO_TYPE_SZARRAY))
3466 return mono_metadata_class_equal (c1->byval_arg.data.klass, c2->byval_arg.data.klass, signature_only);
3467 return FALSE;
3468 }
3469
3470 static gboolean
3471 mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only)
3472 {
3473 gpointer iter1 = 0, iter2 = 0;
3474
3475 if (s1 == s2)
3476 return TRUE;
3477 if (s1->call_convention != s2->call_convention)
3478 return FALSE;
3479 if (s1->sentinelpos != s2->sentinelpos)
3480 return FALSE;
3481 if (s1->hasthis != s2->hasthis)
3482 return FALSE;
3483 if (s1->explicit_this != s2->explicit_this)
3484 return FALSE;
3485 if (! do_mono_metadata_type_equal (s1->ret, s2->ret, signature_only))
3486 return FALSE;
3487 if (s1->param_count != s2->param_count)
3488 return FALSE;
3489
3490 while (TRUE) {
3491 MonoType *t1 = mono_signature_get_params (s1, &iter1);
3492 MonoType *t2 = mono_signature_get_params (s2, &iter2);
3493
3494 if (t1 == NULL || t2 == NULL)
3495 return (t1 == t2);
3496 if (! do_mono_metadata_type_equal (t1, t2, signature_only))
3497 return FALSE;
3498 }
3499 }
3500
3501 /*
3502 * mono_metadata_type_equal:
3503 * @t1: a type
3504 * @t2: another type
3505 *
3506 * Determine if @t1 and @t2 represent the same type.
3507 * Returns: #TRUE if @t1 and @t2 are equal.
3508 */
3509 static gboolean
3510 do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only)
3511 {
3512 if (t1->type != t2->type || t1->byref != t2->byref)
3513 return FALSE;
3514
3515 switch (t1->type) {
3516 case MONO_TYPE_VOID:
3517 case MONO_TYPE_BOOLEAN:
3518 case MONO_TYPE_CHAR:
3519 case MONO_TYPE_I1:
3520 case MONO_TYPE_U1:
3521 case MONO_TYPE_I2:
3522 case MONO_TYPE_U2:
3523 case MONO_TYPE_I4:
3524 case MONO_TYPE_U4:
3525 case MONO_TYPE_I8:
3526 case MONO_TYPE_U8:
3527 case MONO_TYPE_R4:
3528 case MONO_TYPE_R8:
3529 case MONO_TYPE_STRING:
3530 case MONO_TYPE_I:
3531 case MONO_TYPE_U:
3532 case MONO_TYPE_OBJECT:
3533 case MONO_TYPE_TYPEDBYREF:
3534 return TRUE;
3535 case MONO_TYPE_VALUETYPE:
3536 case MONO_TYPE_CLASS:
3537 case MONO_TYPE_SZARRAY:
3538 return mono_metadata_class_equal (t1->data.klass, t2->data.klass, signature_only);
3539 case MONO_TYPE_PTR:
3540 return do_mono_metadata_type_equal (t1->data.type, t2->data.type, signature_only);
3541 case MONO_TYPE_ARRAY:
3542 if (t1->data.array->rank != t2->data.array->rank)
3543 return FALSE;
3544 return mono_metadata_class_equal (t1->data.array->eklass, t2->data.array->eklass, signature_only);
3545 case MONO_TYPE_GENERICINST:
3546 return _mono_metadata_generic_class_equal (
3547 t1->data.generic_class, t2->data.generic_class, signature_only);
3548 case MONO_TYPE_VAR:
3549 return mono_metadata_generic_param_equal (
3550 t1->data.generic_param, t2->data.generic_param, signature_only);
3551 case MONO_TYPE_MVAR:
3552 return mono_metadata_generic_param_equal (
3553 t1->data.generic_param, t2->data.generic_param, signature_only);
3554 case MONO_TYPE_FNPTR:
3555 return mono_metadata_fnptr_equal (t1->data.method, t2->data.method, signature_only);
3556 default:
3557 g_error ("implement type compare for %0x!", t1->type);
3558 return FALSE;
3559 }
3560
3561 return FALSE;
3562 }
3563
3564 gboolean
3565 mono_metadata_type_equal (MonoType *t1, MonoType *t2)
3566 {
3567 return do_mono_metadata_type_equal (t1, t2, FALSE);
3568 }
3569
3570 /**
3571 * mono_metadata_signature_equal:
3572 * @sig1: a signature
3573 * @sig2: another signature
3574 *
3575 * Determine if @sig1 and @sig2 represent the same signature, with the
3576 * same number of arguments and the same types.
3577 * Returns: #TRUE if @sig1 and @sig2 are equal.
3578 */
3579 gboolean
3580 mono_metadata_signature_equal (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
3581 {
3582 int i;
3583
3584 if (sig1->hasthis != sig2->hasthis || sig1->param_count != sig2->param_count)
3585 return FALSE;
3586
3587 /*
3588 * We're just comparing the signatures of two methods here:
3589 *
3590 * If we have two generic methods `void Foo<U> (U u)' and `void Bar<V> (V v)',
3591 * U and V are equal here.
3592 *
3593 * That's what the `signature_only' argument of do_mono_metadata_type_equal() is for.
3594 */
3595
3596 for (i = 0; i < sig1->param_count; i++) {
3597 MonoType *p1 = sig1->params[i];
3598 MonoType *p2 = sig2->params[i];
3599
3600 /* if (p1->attrs != p2->attrs)
3601 return FALSE;
3602 */
3603 if (!do_mono_metadata_type_equal (p1, p2, TRUE))
3604 return FALSE;
3605 }
3606
3607 if (!do_mono_metadata_type_equal (sig1->ret, sig2->ret, TRUE))
3608 return FALSE;
3609 return TRUE;
3610 }
3611
3612 /**
3613 * mono_metadata_type_dup_mp:
3614 * @image: image type is defined in
3615 * @original: type to duplicate
3616 *
3617 * Returns: copy of type allocated from mempool.
3618 */
3619 MonoType *
3620 mono_metadata_type_dup_mp (MonoImage *image, const MonoType *original)
3621 {
3622 MonoType *r = NULL;
3623 mono_loader_lock ();
3624 r = mono_mempool_alloc0 (image->mempool, sizeof(MonoType));
3625 mono_loader_unlock ();
3626 *r = *original;
3627 /* FIXME: we don't handle these yet because they need to duplicate memory
3628 * but the current routines used are not using the mempools
3629 */
3630 if (original->type == MONO_TYPE_PTR ||
3631 original->type == MONO_TYPE_ARRAY ||
3632 original->type == MONO_TYPE_FNPTR)
3633 g_assert_not_reached ();
3634 return r;
3635 }
3636
3637 guint
3638 mono_signature_hash (MonoMethodSignature *sig)
3639 {
3640 guint i, res = sig->ret->type;
3641
3642 for (i = 0; i < sig->param_count; i++)
3643 res = (res << 5) - res + mono_type_hash (sig->params[i]);
3644
3645 return res;
3646 }
3647
3648 /*
3649 * mono_metadata_encode_value:
3650 * @value: value to encode
3651 * @buf: buffer where to write the compressed representation
3652 * @endbuf: pointer updated to point at the end of the encoded output
3653 *
3654 * Encodes the value @value in the compressed representation used
3655 * in metadata and stores the result in @buf. @buf needs to be big
3656 * enough to hold the data (4 bytes).
3657 */
3658 void
3659 mono_metadata_encode_value (guint32 value, char *buf, char **endbuf)
3660 {
3661 char *p = buf;
3662
3663 if (value < 0x80)
3664 *p++ = value;
3665 else if (value < 0x4000) {
3666 p [0] = 0x80 | (value >> 8);
3667 p [1] = value & 0xff;
3668 p += 2;
3669 } else {
3670 p [0] = (value >> 24) | 0xc0;
3671 p [1] = (value >> 16) & 0xff;
3672 p [2] = (value >> 8) & 0xff;
3673 p [3] = value & 0xff;
3674 p += 4;
3675 }
3676 if (endbuf)
3677 *endbuf = p;
3678 }
3679
3680 /*
3681 * mono_metadata_field_info:
3682 * @meta: the Image the field is defined in
3683 * @index: the index in the field table representing the field
3684 * @offset: a pointer to an integer where to store the offset that
3685 * may have been specified for the field in a FieldLayout table
3686 * @rva: a pointer to the RVA of the field data in the image that
3687 * may have been defined in a FieldRVA table
3688 * @marshal_spec: a pointer to the marshal spec that may have been
3689 * defined for the field in a FieldMarshal table.
3690 *
3691 * Gather info for field @index that may have been defined in the FieldLayout,
3692 * FieldRVA and FieldMarshal tables.
3693 * Either of offset, rva and marshal_spec can be NULL if you're not interested
3694 * in the data.
3695 */
3696 void
3697 mono_metadata_field_info (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
3698 MonoMarshalSpec **marshal_spec)
3699 {
3700 MonoTableInfo *tdef;
3701 locator_t loc;
3702
3703 loc.idx = index + 1;
3704 if (meta->uncompressed_metadata)
3705 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
3706
3707 if (offset) {
3708 tdef = &meta->tables [MONO_TABLE_FIELDLAYOUT];
3709
3710 loc.col_idx = MONO_FIELD_LAYOUT_FIELD;
3711 loc.t = tdef;
3712
3713 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
3714 *offset = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_LAYOUT_OFFSET);
3715 } else {
3716 *offset = (guint32)-1;
3717 }
3718 }
3719 if (rva) {
3720 tdef = &meta->tables [MONO_TABLE_FIELDRVA];
3721
3722 loc.col_idx = MONO_FIELD_RVA_FIELD;
3723 loc.t = tdef;
3724
3725 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
3726 /*
3727 * LAMESPEC: There is no signature, no nothing, just the raw data.
3728 */
3729 *rva = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_RVA_RVA);
3730 } else {
3731 *rva = 0;
3732 }
3733 }
3734 if (marshal_spec) {
3735 const char *p;
3736
3737 if ((p = mono_metadata_get_marshal_info (meta, index, TRUE))) {
3738 *marshal_spec = mono_metadata_parse_marshal_spec (meta, p);
3739 }
3740 }
3741
3742 }
3743
3744 /*
3745 * mono_metadata_get_constant_index:
3746 * @meta: the Image the field is defined in
3747 * @index: the token that may have a row defined in the constants table
3748 * @hint: possible position for the row
3749 *
3750 * @token must be a FieldDef, ParamDef or PropertyDef token.
3751 *
3752 * Returns: the index into the Constants table or 0 if not found.
3753 */
3754 guint32
3755 mono_metadata_get_constant_index (MonoImage *meta, guint32 token, guint32 hint)
3756 {
3757 MonoTableInfo *tdef;
3758 locator_t loc;
3759 guint32 index = mono_metadata_token_index (token);
3760
3761 tdef = &meta->tables [MONO_TABLE_CONSTANT];
3762 index <<= MONO_HASCONSTANT_BITS;
3763 switch (mono_metadata_token_table (token)) {
3764 case MONO_TABLE_FIELD:
3765 index |= MONO_HASCONSTANT_FIEDDEF;
3766 break;
3767 case MONO_TABLE_PARAM:
3768 index |= MONO_HASCONSTANT_PARAM;
3769 break;
3770 case MONO_TABLE_PROPERTY:
3771 index |= MONO_HASCONSTANT_PROPERTY;
3772 break;
3773 default:
3774 g_warning ("Not a valid token for the constant table: 0x%08x", token);
3775 return 0;
3776 }
3777 loc.idx = index;
3778 loc.col_idx = MONO_CONSTANT_PARENT;
3779 loc.t = tdef;
3780
3781 /* FIXME: Index translation */
3782
3783 if ((hint > 0) && (hint < tdef->rows) && (mono_metadata_decode_row_col (tdef, hint - 1, MONO_CONSTANT_PARENT) == index))
3784 return hint;
3785
3786 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
3787 return loc.result + 1;
3788 }
3789 return 0;
3790 }
3791
3792 /*
3793 * mono_metadata_events_from_typedef:
3794 * @meta: metadata context
3795 * @index: 0-based index (in the TypeDef table) describing a type
3796 *
3797 * Returns: the 0-based index in the Event table for the events in the
3798 * type. The last event that belongs to the type (plus 1) is stored
3799 * in the @end_idx pointer.
3800 */
3801 guint32
3802 mono_metadata_events_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
3803 {
3804 locator_t loc;
3805 guint32 start, end;
3806 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_EVENTMAP];
3807
3808 *end_idx = 0;
3809
3810 if (!tdef->base)
3811 return 0;
3812
3813 loc.t = tdef;
3814 loc.col_idx = MONO_EVENT_MAP_PARENT;
3815 loc.idx = index + 1;
3816
3817 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3818 return 0;
3819
3820 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_EVENT_MAP_EVENTLIST);
3821 if (loc.result + 1 < tdef->rows) {
3822 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_EVENT_MAP_EVENTLIST) - 1;
3823 } else {
3824 end = meta->tables [MONO_TABLE_EVENT].rows;
3825 }
3826
3827 *end_idx = end;
3828 return start - 1;
3829 }
3830
3831 /*
3832 * mono_metadata_methods_from_event:
3833 * @meta: metadata context
3834 * @index: 0-based index (in the Event table) describing a event
3835 *
3836 * Returns: the 0-based index in the MethodDef table for the methods in the
3837 * event. The last method that belongs to the event (plus 1) is stored
3838 * in the @end_idx pointer.
3839 */
3840 guint32
3841 mono_metadata_methods_from_event (MonoImage *meta, guint32 index, guint *end_idx)
3842 {
3843 locator_t loc;
3844 guint start, end;
3845 guint32 cols [MONO_METHOD_SEMA_SIZE];
3846 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
3847
3848 *end_idx = 0;
3849 if (!msemt->base)
3850 return 0;
3851
3852 if (meta->uncompressed_metadata)
3853 index = search_ptr_table (meta, MONO_TABLE_EVENT_POINTER, index + 1) - 1;
3854
3855 loc.t = msemt;
3856 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
3857 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_EVENT; /* Method association coded index */
3858
3859 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
3860 return 0;
3861
3862 start = loc.result;
3863 /*
3864 * We may end up in the middle of the rows...
3865 */
3866 while (start > 0) {
3867 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
3868 start--;
3869 else
3870 break;
3871 }
3872 end = start + 1;
3873 while (end < msemt->rows) {
3874 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
3875 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
3876 break;
3877 ++end;
3878 }
3879 *end_idx = end;
3880 return start;
3881 }
3882
3883 /*
3884 * mono_metadata_properties_from_typedef:
3885 * @meta: metadata context
3886 * @index: 0-based index (in the TypeDef table) describing a type
3887 *
3888 * Returns: the 0-based index in the Property table for the properties in the
3889 * type. The last property that belongs to the type (plus 1) is stored
3890 * in the @end_idx pointer.
3891 */
3892 guint32
3893 mono_metadata_properties_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
3894 {
3895 locator_t loc;
3896 guint32 start, end;
3897 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_PROPERTYMAP];
3898
3899 *end_idx = 0;
3900
3901 if (!tdef->base)
3902 return 0;
3903
3904 loc.t = tdef;
3905 loc.col_idx = MONO_PROPERTY_MAP_PARENT;
3906 loc.idx = index + 1;
3907
3908 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3909 return 0;
3910
3911 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_PROPERTY_MAP_PROPERTY_LIST);
3912 if (loc.result + 1 < tdef->rows) {
3913 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_PROPERTY_MAP_PROPERTY_LIST) - 1;
3914 } else {
3915 end = meta->tables [MONO_TABLE_PROPERTY].rows;
3916 }
3917
3918 *end_idx = end;
3919 return start - 1;
3920 }
3921
3922 /*
3923 * mono_metadata_methods_from_property:
3924 * @meta: metadata context
3925 * @index: 0-based index (in the PropertyDef table) describing a property
3926 *
3927 * Returns: the 0-based index in the MethodDef table for the methods in the
3928 * property. The last method that belongs to the property (plus 1) is stored
3929 * in the @end_idx pointer.
3930 */
3931 guint32
3932 mono_metadata_methods_from_property (MonoImage *meta, guint32 index, guint *end_idx)
3933 {
3934 locator_t loc;
3935 guint start, end;
3936 guint32 cols [MONO_METHOD_SEMA_SIZE];
3937 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
3938
3939 *end_idx = 0;
3940 if (!msemt->base)
3941 return 0;
3942
3943 if (meta->uncompressed_metadata)
3944 index = search_ptr_table (meta, MONO_TABLE_PROPERTY_POINTER, index + 1) - 1;
3945
3946 loc.t = msemt;
3947 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
3948 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_PROPERTY; /* Method association coded index */
3949
3950 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
3951 return 0;
3952
3953 start = loc.result;
3954 /*
3955 * We may end up in the middle of the rows...
3956 */
3957 while (start > 0) {
3958 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
3959 start--;
3960 else
3961 break;
3962 }
3963 end = start + 1;
3964 while (end < msemt->rows) {
3965 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
3966 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
3967 break;
3968 ++end;
3969 }
3970 *end_idx = end;
3971 return start;
3972 }
3973
3974 guint32
3975 mono_metadata_implmap_from_method (MonoImage *meta, guint32 method_idx)
3976 {
3977 locator_t loc;
3978 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_IMPLMAP];
3979
3980 if (!tdef->base)
3981 return 0;
3982
3983 /* No index translation seems to be needed */
3984
3985 loc.t = tdef;
3986 loc.col_idx = MONO_IMPLMAP_MEMBER;
3987 loc.idx = ((method_idx + 1) << MONO_MEMBERFORWD_BITS) | MONO_MEMBERFORWD_METHODDEF;
3988
3989 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3990 return 0;
3991
3992 return loc.result + 1;
3993 }
3994
3995 /**
3996 * @image: context where the image is created
3997 * @type_spec: typespec token
3998 *
3999 * Creates a MonoType representing the TypeSpec indexed by the @type_spec
4000 * token.
4001 */
4002 MonoType *
4003 mono_type_create_from_typespec (MonoImage *image, guint32 type_spec)
4004 {
4005 guint32 idx = mono_metadata_token_index (type_spec);
4006 MonoTableInfo *t;
4007 guint32 cols [MONO_TYPESPEC_SIZE];
4008 const char *ptr;
4009 guint32 len;
4010 MonoType *type;
4011
4012 mono_loader_lock ();
4013
4014 type = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4015 if (type) {
4016 mono_loader_unlock ();
4017 return type;
4018 }
4019
4020 t = &image->tables [MONO_TABLE_TYPESPEC];
4021
4022 mono_metadata_decode_row (t, idx-1, cols, MONO_TYPESPEC_SIZE);
4023 ptr = mono_metadata_blob_heap (image, cols [MONO_TYPESPEC_SIGNATURE]);
4024 len = mono_metadata_decode_value (ptr, &ptr);
4025
4026 type = g_new0 (MonoType, 1);
4027
4028 g_hash_table_insert (image->typespec_cache, GUINT_TO_POINTER (type_spec), type);
4029
4030 if (*ptr == MONO_TYPE_BYREF) {
4031 type->byref = 1;
4032 ptr++;
4033 }
4034
4035 if (!do_mono_metadata_parse_type (type, image, NULL, ptr, &ptr)) {
4036 g_hash_table_remove (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4037 g_free (type);
4038 mono_loader_unlock ();
4039 return NULL;
4040 }
4041
4042 mono_loader_unlock ();
4043
4044 return type;
4045 }
4046
4047 MonoMarshalSpec *
4048 mono_metadata_parse_marshal_spec (MonoImage *image, const char *ptr)
4049 {
4050 MonoMarshalSpec *res;
4051 int len;
4052 const char *start = ptr;
4053
4054 /* fixme: this is incomplete, but I cant find more infos in the specs */
4055
4056 res = g_new0 (MonoMarshalSpec, 1);
4057
4058 len = mono_metadata_decode_value (ptr, &ptr);
4059 res->native = *ptr++;
4060
4061 if (res->native == MONO_NATIVE_LPARRAY) {
4062 res->data.array_data.param_num = -1;
4063 res->data.array_data.num_elem = -1;
4064 res->data.array_data.elem_mult = -1;
4065
4066 if (ptr - start <= len)
4067 res->data.array_data.elem_type = *ptr++;
4068 if (ptr - start <= len)
4069 res->data.array_data.param_num = mono_metadata_decode_value (ptr, &ptr);
4070 if (ptr - start <= len)
4071 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4072 if (ptr - start <= len) {
4073 /*
4074 * LAMESPEC: Older spec versions say this parameter comes before
4075 * num_elem. Never spec versions don't talk about elem_mult at
4076 * all, but csc still emits it, and it is used to distinguish
4077 * between param_num being 0, and param_num being omitted.
4078 * So if (param_num == 0) && (num_elem > 0), then
4079 * elem_mult == 0 -> the array size is num_elem
4080 * elem_mult == 1 -> the array size is @param_num + num_elem
4081 */
4082 res->data.array_data.elem_mult = mono_metadata_decode_value (ptr, &ptr);
4083 }
4084 }
4085
4086 if (res->native == MONO_NATIVE_BYVALTSTR) {
4087 if (ptr - start <= len)
4088 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4089 }
4090
4091 if (res->native == MONO_NATIVE_BYVALARRAY) {
4092 if (ptr - start <= len)
4093 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4094 }
4095
4096 if (res->native == MONO_NATIVE_CUSTOM) {
4097 /* skip unused type guid */
4098 len = mono_metadata_decode_value (ptr, &ptr);
4099 ptr += len;
4100 /* skip unused native type name */
4101 len = mono_metadata_decode_value (ptr, &ptr);
4102 ptr += len;
4103 /* read custom marshaler type name */
4104 len = mono_metadata_decode_value (ptr, &ptr);
4105 res->data.custom_data.custom_name = g_strndup (ptr, len);
4106 ptr += len;
4107 /* read cookie string */
4108 len = mono_metadata_decode_value (ptr, &ptr);
4109 res->data.custom_data.cookie = g_strndup (ptr, len);
4110 }
4111
4112 if (res->native == MONO_NATIVE_SAFEARRAY) {
4113 res->data.safearray_data.elem_type = 0;
4114 res->data.safearray_data.num_elem = 0;
4115 if (ptr - start <= len)
4116 res->data.safearray_data.elem_type = *ptr++;
4117 if (ptr - start <= len)
4118 res->data.safearray_data.num_elem = *ptr++;
4119 }
4120 return res;
4121 }
4122
4123 void
4124 mono_metadata_free_marshal_spec (MonoMarshalSpec *spec)
4125 {
4126 if (spec->native == MONO_NATIVE_CUSTOM) {
4127 g_free (spec->data.custom_data.custom_name);
4128 g_free (spec->data.custom_data.cookie);
4129 }
4130 g_free (spec);
4131 }
4132
4133 /**
4134 * mono_type_to_unmanaged:
4135 *
4136 * Returns: A MonoMarshalNative enumeration value (MONO_NATIVE_) value
4137 * describing the underlying native reprensetation of the type.
4138 *
4139 * In addition the value pointed by
4140 * "conv" will contain the kind of marshalling required for this
4141 * particular type one of the MONO_MARSHAL_CONV_ enumeration values.
4142 */
4143 guint32
4144 mono_type_to_unmanaged (MonoType *type, MonoMarshalSpec *mspec, gboolean as_field,
4145 gboolean unicode, MonoMarshalConv *conv)
4146 {
4147 MonoMarshalConv dummy_conv;
4148 int t = type->type;
4149
4150 if (!conv)
4151 conv = &dummy_conv;
4152
4153 *conv = MONO_MARSHAL_CONV_NONE;
4154
4155 if (type->byref)
4156 return MONO_NATIVE_UINT;
4157
4158 handle_enum:
4159 switch (t) {
4160 case MONO_TYPE_BOOLEAN:
4161 if (mspec) {
4162 switch (mspec->native) {
4163 case MONO_NATIVE_VARIANTBOOL:
4164 *conv = MONO_MARSHAL_CONV_BOOL_VARIANTBOOL;
4165 return MONO_NATIVE_VARIANTBOOL;
4166 case MONO_NATIVE_BOOLEAN:
4167 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4168 return MONO_NATIVE_BOOLEAN;
4169 case MONO_NATIVE_I1:
4170 case MONO_NATIVE_U1:
4171 return mspec->native;
4172 default:
4173 g_error ("cant marshal bool to native type %02x", mspec->native);
4174 }
4175 }
4176 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4177 return MONO_NATIVE_BOOLEAN;
4178 case MONO_TYPE_CHAR: return MONO_NATIVE_U2;
4179 case MONO_TYPE_I1: return MONO_NATIVE_I1;
4180 case MONO_TYPE_U1: return MONO_NATIVE_U1;
4181 case MONO_TYPE_I2: return MONO_NATIVE_I2;
4182 case MONO_TYPE_U2: return MONO_NATIVE_U2;
4183 case MONO_TYPE_I4: return MONO_NATIVE_I4;
4184 case MONO_TYPE_U4: return MONO_NATIVE_U4;
4185 case MONO_TYPE_I8: return MONO_NATIVE_I8;
4186 case MONO_TYPE_U8: return MONO_NATIVE_U8;
4187 case MONO_TYPE_R4: return MONO_NATIVE_R4;
4188 case MONO_TYPE_R8: return MONO_NATIVE_R8;
4189 case MONO_TYPE_STRING:
4190 if (mspec) {
4191 switch (mspec->native) {
4192 case MONO_NATIVE_BSTR:
4193 *conv = MONO_MARSHAL_CONV_STR_BSTR;
4194 return MONO_NATIVE_BSTR;
4195 case MONO_NATIVE_LPSTR:
4196 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
4197 return MONO_NATIVE_LPSTR;
4198 case MONO_NATIVE_LPWSTR:
4199 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
4200 return MONO_NATIVE_LPWSTR;
4201 case MONO_NATIVE_LPTSTR:
4202 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
4203 return MONO_NATIVE_LPTSTR;
4204 case MONO_NATIVE_ANSIBSTR:
4205 *conv = MONO_MARSHAL_CONV_STR_ANSIBSTR;
4206 return MONO_NATIVE_ANSIBSTR;
4207 case MONO_NATIVE_TBSTR:
4208 *conv = MONO_MARSHAL_CONV_STR_TBSTR;
4209 return MONO_NATIVE_TBSTR;
4210 case MONO_NATIVE_BYVALTSTR:
4211 if (unicode)
4212 *conv = MONO_MARSHAL_CONV_STR_BYVALWSTR;
4213 else
4214 *conv = MONO_MARSHAL_CONV_STR_BYVALSTR;
4215 return MONO_NATIVE_BYVALTSTR;
4216 default:
4217 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);
4218 }
4219 }
4220 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
4221 return MONO_NATIVE_LPTSTR;
4222 case MONO_TYPE_PTR: return MONO_NATIVE_UINT;
4223 case MONO_TYPE_VALUETYPE: /*FIXME*/
4224 if (type->data.klass->enumtype) {
4225 t = type->data.klass->enum_basetype->type;
4226 goto handle_enum;
4227 }
4228 if (type->data.klass == mono_defaults.handleref_class){
4229 *conv = MONO_MARSHAL_CONV_HANDLEREF;
4230 return MONO_NATIVE_INT;
4231 }
4232 return MONO_NATIVE_STRUCT;
4233 case MONO_TYPE_SZARRAY:
4234 case MONO_TYPE_ARRAY:
4235 if (mspec) {
4236 switch (mspec->native) {
4237 case MONO_NATIVE_BYVALARRAY:
4238 if ((type->data.klass->element_class == mono_defaults.char_class) && !unicode)
4239 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALCHARARRAY;
4240 else
4241 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALARRAY;
4242 return MONO_NATIVE_BYVALARRAY;
4243 case MONO_NATIVE_SAFEARRAY:
4244 *conv = MONO_MARSHAL_CONV_ARRAY_SAVEARRAY;
4245 return MONO_NATIVE_SAFEARRAY;
4246 case MONO_NATIVE_LPARRAY:
4247 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4248 return MONO_NATIVE_LPARRAY;
4249 default:
4250 g_error ("cant marshal array as native type %02x", mspec->native);
4251 }
4252 }
4253
4254 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4255 return MONO_NATIVE_LPARRAY;
4256 case MONO_TYPE_I: return MONO_NATIVE_INT;
4257 case MONO_TYPE_U: return MONO_NATIVE_UINT;
4258 case MONO_TYPE_CLASS:
4259 case MONO_TYPE_OBJECT: {
4260 /* FIXME : we need to handle ArrayList and StringBuilder here, probably */
4261 if (mspec) {
4262 switch (mspec->native) {
4263 case MONO_NATIVE_STRUCT:
4264 return MONO_NATIVE_STRUCT;
4265 case MONO_NATIVE_INTERFACE:
4266 *conv = MONO_MARSHAL_CONV_OBJECT_INTERFACE;
4267 return MONO_NATIVE_INTERFACE;
4268 case MONO_NATIVE_IDISPATCH:
4269 *conv = MONO_MARSHAL_CONV_OBJECT_IDISPATCH;
4270 return MONO_NATIVE_IDISPATCH;
4271 case MONO_NATIVE_IUNKNOWN:
4272 *conv = MONO_MARSHAL_CONV_OBJECT_IUNKNOWN;
4273 return MONO_NATIVE_IUNKNOWN;
4274 case MONO_NATIVE_FUNC:
4275 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4276 type->data.klass == mono_defaults.delegate_class ||
4277 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4278 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4279 return MONO_NATIVE_FUNC;
4280 }
4281 /* Fall through */
4282 default:
4283 g_error ("cant marshal object as native type %02x", mspec->native);
4284 }
4285 }
4286 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4287 type->data.klass == mono_defaults.delegate_class ||
4288 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4289 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4290 return MONO_NATIVE_FUNC;
4291 }
4292 if (mono_defaults.safehandle_class && type->data.klass == mono_defaults.safehandle_class){
4293 *conv = MONO_MARSHAL_CONV_SAFEHANDLE;
4294 return MONO_NATIVE_INT;
4295 }
4296 *conv = MONO_MARSHAL_CONV_OBJECT_STRUCT;
4297 return MONO_NATIVE_STRUCT;
4298 }
4299 case MONO_TYPE_FNPTR: return MONO_NATIVE_FUNC;
4300 case MONO_TYPE_GENERICINST:
4301 type = &type->data.generic_class->container_class->byval_arg;
4302 t = type->type;
4303 goto handle_enum;
4304 case MONO_TYPE_TYPEDBYREF:
4305 default:
4306 g_error ("type 0x%02x not handled in marshal", t);
4307 }
4308 return MONO_NATIVE_MAX;
4309 }
4310
4311 const char*
4312 mono_metadata_get_marshal_info (MonoImage *meta, guint32 idx, gboolean is_field)
4313 {
4314 locator_t loc;
4315 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_FIELDMARSHAL];
4316
4317 if (!tdef->base)
4318 return NULL;
4319
4320 loc.t = tdef;
4321 loc.col_idx = MONO_FIELD_MARSHAL_PARENT;
4322 loc.idx = ((idx + 1) << MONO_HAS_FIELD_MARSHAL_BITS) | (is_field? MONO_HAS_FIELD_MARSHAL_FIELDSREF: MONO_HAS_FIELD_MARSHAL_PARAMDEF);
4323
4324 /* FIXME: Index translation */
4325
4326 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4327 return NULL;
4328
4329 return mono_metadata_blob_heap (meta, mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_MARSHAL_NATIVE_TYPE));
4330 }
4331
4332 static MonoMethod*
4333 method_from_method_def_or_ref (MonoImage *m, guint32 tok, MonoGenericContext *context)
4334 {
4335 guint32 idx = tok >> MONO_METHODDEFORREF_BITS;
4336
4337 switch (tok & MONO_METHODDEFORREF_MASK) {
4338 case MONO_METHODDEFORREF_METHODDEF:
4339 return mono_get_method_full (m, MONO_TOKEN_METHOD_DEF | idx, NULL, context);
4340 case MONO_METHODDEFORREF_METHODREF:
4341 return mono_get_method_full (m, MONO_TOKEN_MEMBER_REF | idx, NULL, context);
4342 }
4343 g_assert_not_reached ();
4344 return NULL;
4345 }
4346
4347 /*
4348 * mono_class_get_overrides_full:
4349 *
4350 * Return the method overrides belonging to class @type_token in @overrides, and
4351 * the number of overrides in @num_overrides.
4352 *
4353 * Returns: TRUE on success, FALSE on failure.
4354 */
4355 gboolean
4356 mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod ***overrides, gint32 *num_overrides,
4357 MonoGenericContext *generic_context)
4358 {
4359 locator_t loc;
4360 MonoTableInfo *tdef = &image->tables [MONO_TABLE_METHODIMPL];
4361 guint32 start, end;
4362 gint32 i, num;
4363 guint32 cols [MONO_METHODIMPL_SIZE];
4364 MonoMethod **result;
4365 gint32 ok = TRUE;
4366
4367 *overrides = NULL;
4368 if (num_overrides)
4369 *num_overrides = 0;
4370
4371 if (!tdef->base)
4372 return TRUE;
4373
4374 loc.t = tdef;
4375 loc.col_idx = MONO_METHODIMPL_CLASS;
4376 loc.idx = mono_metadata_token_index (type_token);
4377
4378 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4379 return TRUE;
4380
4381 start = loc.result;
4382 end = start + 1;
4383 /*
4384 * We may end up in the middle of the rows...
4385 */
4386 while (start > 0) {
4387 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_METHODIMPL_CLASS))
4388 start--;
4389 else
4390 break;
4391 }
4392 while (end < tdef->rows) {
4393 if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
4394 end++;
4395 else
4396 break;
4397 }
4398 num = end - start;
4399 result = g_new (MonoMethod*, num * 2);
4400 for (i = 0; i < num; ++i) {
4401 MonoMethod *method;
4402
4403 mono_metadata_decode_row (tdef, start + i, cols, MONO_METHODIMPL_SIZE);
4404 method = method_from_method_def_or_ref (
4405 image, cols [MONO_METHODIMPL_DECLARATION], generic_context);
4406 if (method == NULL)
4407 ok = FALSE;
4408 result [i * 2] = method;
4409 method = method_from_method_def_or_ref (
4410 image, cols [MONO_METHODIMPL_BODY], generic_context);
4411 if (method == NULL)
4412 ok = FALSE;
4413 result [i * 2 + 1] = method;
4414 }
4415
4416 *overrides = result;
4417 if (num_overrides)
4418 *num_overrides = num;
4419 return ok;
4420 }
4421
4422 /**
4423 * mono_guid_to_string:
4424 *
4425 * Converts a 16 byte Microsoft GUID to the standard string representation.
4426 */
4427 char *
4428 mono_guid_to_string (const guint8 *guid)
4429 {
4430 return g_strdup_printf ("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
4431 guid[3], guid[2], guid[1], guid[0],
4432 guid[5], guid[4],
4433 guid[7], guid[6],
4434 guid[8], guid[9],
4435 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
4436 }
4437
4438 static gboolean
4439 get_constraints (MonoImage *image, int owner, MonoClass ***constraints, MonoGenericContainer *container)
4440 {
4441 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAMCONSTRAINT];
4442 guint32 cols [MONO_GENPARCONSTRAINT_SIZE];
4443 guint32 i, token, found;
4444 MonoClass *klass, **res;
4445 GList *cons = NULL, *tmp;
4446 MonoGenericContext *context = &container->context;
4447
4448 *constraints = NULL;
4449 found = 0;
4450 for (i = 0; i < tdef->rows; ++i) {
4451 mono_metadata_decode_row (tdef, i, cols, MONO_GENPARCONSTRAINT_SIZE);
4452 if (cols [MONO_GENPARCONSTRAINT_GENERICPAR] == owner) {
4453 token = mono_metadata_token_from_dor (cols [MONO_GENPARCONSTRAINT_CONSTRAINT]);
4454 klass = mono_class_get_full (image, token, context);
4455 cons = g_list_append (cons, klass);
4456 ++found;
4457 } else {
4458 /* contiguous list finished */
4459 if (found)
4460 break;
4461 }
4462 }
4463 if (!found)
4464 return TRUE;
4465 res = g_new0 (MonoClass*, found + 1);
4466 for (i = 0, tmp = cons; i < found; ++i, tmp = tmp->next) {
4467 res [i] = tmp->data;
4468 }
4469 g_list_free (cons);
4470 *constraints = res;
4471 return TRUE;
4472 }
4473
4474 /*
4475 * mono_metadata_get_generic_param_row:
4476 *
4477 * @image:
4478 * @token: TypeOrMethodDef token, owner for GenericParam
4479 * @owner: coded token, set on return
4480 *
4481 * Returns: 1-based row-id in the GenericParam table whose
4482 * owner is @token. 0 if not found.
4483 */
4484 guint32
4485 mono_metadata_get_generic_param_row (MonoImage *image, guint32 token, guint32 *owner)
4486 {
4487 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
4488 guint32 cols [MONO_GENERICPARAM_SIZE];
4489 guint32 i;
4490
4491 g_assert (owner);
4492 if (!tdef->base)
4493 return 0;
4494
4495 if (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
4496 *owner = MONO_TYPEORMETHOD_TYPE;
4497 else if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
4498 *owner = MONO_TYPEORMETHOD_METHOD;
4499 else {
4500 g_error ("wrong token %x to get_generic_param_row", token);
4501 return 0;
4502 }
4503 *owner |= mono_metadata_token_index (token) << MONO_TYPEORMETHOD_BITS;
4504
4505 for (i = 0; i < tdef->rows; ++i) {
4506 mono_metadata_decode_row (tdef, i, cols, MONO_GENERICPARAM_SIZE);
4507 if (cols [MONO_GENERICPARAM_OWNER] == *owner)
4508 return i + 1;
4509 }
4510
4511 return 0;
4512 }
4513
4514 gboolean
4515 mono_metadata_has_generic_params (MonoImage *image, guint32 token)
4516 {
4517 guint32 owner;
4518 return mono_metadata_get_generic_param_row (image, token, &owner);
4519 }
4520
4521 /*
4522 * mono_metadata_load_generic_param_constraints:
4523 *
4524 * Load the generic parameter constraints for the newly created generic type or method
4525 * represented by @token and @container. The @container is the new container which has
4526 * been returned by a call to mono_metadata_load_generic_params() with this @token.
4527 */
4528 void
4529 mono_metadata_load_generic_param_constraints (MonoImage *image, guint32 token,
4530 MonoGenericContainer *container)
4531 {
4532 guint32 start_row, i, owner;
4533 if (! (start_row = mono_metadata_get_generic_param_row (image, token, &owner)))
4534 return;
4535 for (i = 0; i < container->type_argc; i++)
4536 get_constraints (image, start_row + i, &container->type_params [i].constraints, container);
4537 }
4538
4539 /*
4540 * mono_metadata_load_generic_params:
4541 *
4542 * Load the type parameters from the type or method definition @token.
4543 *
4544 * Use this method after parsing a type or method definition to figure out whether it's a generic
4545 * type / method. When parsing a method definition, @parent_container points to the generic container
4546 * of the current class, if any.
4547 *
4548 * Note: This method does not load the constraints: for typedefs, this has to be done after fully
4549 * creating the type.
4550 *
4551 * Returns: NULL if @token is not a generic type or method definition or the new generic container.
4552 *
4553 */
4554 MonoGenericContainer *
4555 mono_metadata_load_generic_params (MonoImage *image, guint32 token, MonoGenericContainer *parent_container)
4556 {
4557 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
4558 guint32 cols [MONO_GENERICPARAM_SIZE];
4559 guint32 i, owner = 0, n;
4560 MonoGenericContainer *container;
4561 MonoGenericParam *params;
4562
4563 if (!(i = mono_metadata_get_generic_param_row (image, token, &owner)))
4564 return NULL;
4565 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
4566 params = NULL;
4567 n = 0;
4568 container = g_new0 (MonoGenericContainer, 1);
4569 do {
4570 n++;
4571 params = g_realloc (params, sizeof (MonoGenericParam) * n);
4572 params [n - 1].owner = container;
4573 params [n - 1].pklass = NULL;
4574 params [n - 1].flags = cols [MONO_GENERICPARAM_FLAGS];
4575 params [n - 1].num = cols [MONO_GENERICPARAM_NUMBER];
4576 params [n - 1].name = mono_metadata_string_heap (image, cols [MONO_GENERICPARAM_NAME]);
4577 params [n - 1].constraints = NULL;
4578 if (++i > tdef->rows)
4579 break;
4580 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
4581 } while (cols [MONO_GENERICPARAM_OWNER] == owner);
4582
4583 container->type_argc = n;
4584 container->type_params = params;
4585 container->parent = parent_container;
4586
4587 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
4588 container->is_method = 1;
4589
4590 g_assert (container->parent == NULL || container->is_method);
4591
4592 return container;
4593 }
4594
4595 gboolean
4596 mono_type_is_byref (MonoType *type)
4597 {
4598 return type->byref;
4599 }
4600
4601 int
4602 mono_type_get_type (MonoType *type)
4603 {
4604 return type->type;
4605 }
4606
4607 /* For MONO_TYPE_FNPTR */
4608 MonoMethodSignature*
4609 mono_type_get_signature (MonoType *type)
4610 {
4611 return type->data.method;
4612 }
4613
4614 /* For MONO_TYPE_CLASS, VALUETYPE */
4615 MonoClass*
4616 mono_type_get_class (MonoType *type)
4617 {
4618 return type->data.klass;
4619 }
4620
4621 /* For MONO_TYPE_ARRAY */
4622 MonoArrayType*
4623 mono_type_get_array_type (MonoType *type)
4624 {
4625 return type->data.array;
4626 }
4627
4628 /* For MONO_TYPE_PTR */
4629 MonoType*
4630 mono_type_get_ptr_type (MonoType *type)
4631 {
4632 return type->data.type;
4633 }
4634
4635 MonoClass*
4636 mono_type_get_modifiers (MonoType *type, gboolean *is_required, gpointer *iter)
4637 {
4638 /* FIXME: implement */
4639 return NULL;
4640 }
4641
4642 MonoType*
4643 mono_signature_get_return_type (MonoMethodSignature *sig)
4644 {
4645 return sig->ret;
4646 }
4647
4648 MonoType*
4649 mono_signature_get_params (MonoMethodSignature *sig, gpointer *iter)
4650 {
4651 MonoType** type;
4652 if (!iter)
4653 return NULL;
4654 if (!*iter) {
4655 /* start from the first */
4656 if (sig->param_count) {
4657 *iter = &sig->params [0];
4658 return sig->params [0];
4659 } else {
4660 /* no method */
4661 return NULL;
4662 }
4663 }
4664 type = *iter;
4665 type++;
4666 if (type < &sig->params [sig->param_count]) {
4667 *iter = type;
4668 return *type;
4669 }
4670 return NULL;
4671 }
4672
4673 guint32
4674 mono_signature_get_param_count (MonoMethodSignature *sig)
4675 {
4676 return sig->param_count;
4677 }
4678
4679 guint32
4680 mono_signature_get_call_conv (MonoMethodSignature *sig)
4681 {
4682 return sig->call_convention;
4683 }
4684
4685 int
4686 mono_signature_vararg_start (MonoMethodSignature *sig)
4687 {
4688 return sig->sentinelpos;
4689 }
4690
4691 gboolean
4692 mono_signature_is_instance (MonoMethodSignature *sig)
4693 {
4694 return sig->hasthis;
4695 }
4696
4697 gboolean
4698 mono_signature_explicit_this (MonoMethodSignature *sig)
4699 {
4700 return sig->explicit_this;
4701 }
4702
4703 /* for use with allocated memory blocks (assumes alignment is to 8 bytes) */
4704 guint
4705 mono_aligned_addr_hash (gconstpointer ptr)
4706 {
4707 return GPOINTER_TO_UINT (ptr) >> 3;
4708 }
4709
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