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In Test/System.Data:
[mono-project.git] / mono / metadata / metadata.c
blob094ea0c314dcfd9f4a370283b557ac8c79ec9b08
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 char *
925 dword_align (const char *ptr)
926 {
927 #if SIZEOF_VOID_P == 8
928 return (const char *) (((guint64) (ptr + 3)) & ~3);
929 #else
930 return (const 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 = 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 = 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 MonoInflatedGenericClass *igclass;
2016 MonoGenericClass *gclass, *cached;
2017 MonoClass *gklass;
2018 MonoType *gtype;
2019 int count;
2020
2021 igclass = g_new0 (MonoInflatedGenericClass, 1);
2022 gclass = &igclass->generic_class;
2023 gclass->is_inflated = TRUE;
2024
2025 type->data.generic_class = gclass;
2026
2027 gclass->context = g_new0 (MonoGenericContext, 1);
2028 gclass->context->gclass = gclass;
2029
2030 /*
2031 * Create the klass before parsing the type arguments.
2032 * This is required to support "recursive" definitions.
2033 * See mcs/tests/gen-23.cs for an example.
2034 */
2035 igclass->klass = g_new0 (MonoClass, 1);
2036
2037 gtype = mono_metadata_parse_type (m, MONO_PARSE_TYPE, 0, ptr, &ptr);
2038 if (gtype == NULL)
2039 return FALSE;
2040 gclass->container_class = gklass = mono_class_from_mono_type (gtype);
2041
2042 g_assert (gklass->generic_container);
2043 gclass->context->container = gklass->generic_container;
2044
2045 count = mono_metadata_decode_value (ptr, &ptr);
2046
2047 gclass->inst = mono_metadata_parse_generic_inst (m, container, count, ptr, &ptr);
2048
2049 if (rptr)
2050 *rptr = ptr;
2051
2052 /* If we failed to parse, return, the error has been flagged. */
2053 if (gclass->inst == NULL)
2054 return FALSE;
2055
2056 /*
2057 * We may be called multiple times on different metadata to create the same
2058 * instantiated type. This happens for instance if we're part of a method or
2059 * local variable signature.
2060 *
2061 * It's important to return the same MonoGenericClass * for each particualar
2062 * instantiation of a generic type (ie "Stack<Int32>") to make static fields
2063 * work.
2064 *
2065 * According to the spec ($26.1.5), a static variable in a generic class
2066 * declaration is shared amongst all instances of the same closed constructed
2067 * type.
2068 */
2069
2070 cached = g_hash_table_lookup (generic_class_cache, gclass);
2071 if (cached) {
2072 g_free (igclass->klass);
2073 g_free (gclass);
2074
2075 type->data.generic_class = cached;
2076 return TRUE;
2077 } else {
2078 g_hash_table_insert (generic_class_cache, gclass, gclass);
2079
2080 mono_stats.generic_instance_count++;
2081 mono_stats.generics_metadata_size += sizeof (MonoGenericClass) +
2082 sizeof (MonoGenericContext) +
2083 gclass->inst->type_argc * sizeof (MonoType);
2084 }
2085 return TRUE;
2086 }
2087
2088 /*
2089 * select_container:
2090 * @gc: The generic container to normalize
2091 * @type: The kind of generic parameters the resulting generic-container should contain
2092 */
2093
2094 static MonoGenericContainer *
2095 select_container (MonoGenericContainer *gc, MonoTypeEnum type)
2096 {
2097 gboolean is_var = (type == MONO_TYPE_VAR);
2098 if (!gc)
2099 return NULL;
2100
2101 g_assert (is_var || type == MONO_TYPE_MVAR);
2102
2103 if (is_var) {
2104 if (gc->is_method || gc->parent)
2105 /*
2106 * The current MonoGenericContainer is a generic method -> its `parent'
2107 * points to the containing class'es container.
2108 */
2109 return gc->parent;
2110 }
2111
2112 return gc;
2113 }
2114
2115 /*
2116 * mono_metadata_parse_generic_param:
2117 * @generic_container: Our MonoClass's or MonoMethodNormal's MonoGenericContainer;
2118 * see mono_metadata_parse_type_full() for details.
2119 * Internal routine to parse a generic type parameter.
2120 */
2121 static MonoGenericParam *
2122 mono_metadata_parse_generic_param (MonoImage *m, MonoGenericContainer *generic_container,
2123 MonoTypeEnum type, const char *ptr, const char **rptr)
2124 {
2125 int index = mono_metadata_decode_value (ptr, &ptr);
2126 if (rptr)
2127 *rptr = ptr;
2128
2129 generic_container = select_container (generic_container, type);
2130 if (!generic_container) {
2131 /* Create dummy MonoGenericParam */
2132 MonoGenericParam *param = g_new0 (MonoGenericParam, 1);
2133 param->name = g_strdup_printf ("%d", index);
2134 param->num = index;
2135
2136 return param;
2137 }
2138
2139 g_assert (index < generic_container->type_argc);
2140 return &generic_container->type_params [index];
2141 }
2142
2143 /*
2144 * do_mono_metadata_parse_type:
2145 * @type: MonoType to be filled in with the return value
2146 * @m: image context
2147 * @generic_context: generics_context
2148 * @ptr: pointer to the encoded type
2149 * @rptr: pointer where the end of the encoded type is saved
2150 *
2151 * Internal routine used to "fill" the contents of @type from an
2152 * allocated pointer. This is done this way to avoid doing too
2153 * many mini-allocations (particularly for the MonoFieldType which
2154 * most of the time is just a MonoType, but sometimes might be augmented).
2155 *
2156 * This routine is used by mono_metadata_parse_type and
2157 * mono_metadata_parse_field_type
2158 *
2159 * This extracts a Type as specified in Partition II (22.2.12)
2160 *
2161 * Returns: FALSE if the type could not be loaded
2162 */
2163 static gboolean
2164 do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2165 const char *ptr, const char **rptr)
2166 {
2167 gboolean ok = TRUE;
2168 type->type = mono_metadata_decode_value (ptr, &ptr);
2169
2170 switch (type->type){
2171 case MONO_TYPE_VOID:
2172 case MONO_TYPE_BOOLEAN:
2173 case MONO_TYPE_CHAR:
2174 case MONO_TYPE_I1:
2175 case MONO_TYPE_U1:
2176 case MONO_TYPE_I2:
2177 case MONO_TYPE_U2:
2178 case MONO_TYPE_I4:
2179 case MONO_TYPE_U4:
2180 case MONO_TYPE_I8:
2181 case MONO_TYPE_U8:
2182 case MONO_TYPE_R4:
2183 case MONO_TYPE_R8:
2184 case MONO_TYPE_I:
2185 case MONO_TYPE_U:
2186 case MONO_TYPE_STRING:
2187 case MONO_TYPE_OBJECT:
2188 case MONO_TYPE_TYPEDBYREF:
2189 break;
2190 case MONO_TYPE_VALUETYPE:
2191 case MONO_TYPE_CLASS: {
2192 guint32 token;
2193 token = mono_metadata_parse_typedef_or_ref (m, ptr, &ptr);
2194 type->data.klass = mono_class_get (m, token);
2195 if (!type->data.klass)
2196 return FALSE;
2197 break;
2198 }
2199 case MONO_TYPE_SZARRAY: {
2200 MonoType *etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2201 if (!etype)
2202 return FALSE;
2203 type->data.klass = mono_class_from_mono_type (etype);
2204 mono_metadata_free_type (etype);
2205 break;
2206 }
2207 case MONO_TYPE_PTR:
2208 type->data.type = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2209 if (!type->data.type)
2210 return FALSE;
2211 break;
2212 case MONO_TYPE_FNPTR:
2213 type->data.method = mono_metadata_parse_method_signature_full (m, container, 0, ptr, &ptr);
2214 break;
2215 case MONO_TYPE_ARRAY:
2216 type->data.array = mono_metadata_parse_array_full (m, container, ptr, &ptr);
2217 break;
2218 case MONO_TYPE_MVAR:
2219 case MONO_TYPE_VAR:
2220 type->data.generic_param = mono_metadata_parse_generic_param (m, container, type->type, ptr, &ptr);
2221 break;
2222 case MONO_TYPE_GENERICINST:
2223 ok = do_mono_metadata_parse_generic_class (type, m, container, ptr, &ptr);
2224 break;
2225 default:
2226 g_error ("type 0x%02x not handled in do_mono_metadata_parse_type", type->type);
2227 }
2228
2229 if (rptr)
2230 *rptr = ptr;
2231 return ok;
2232 }
2233
2234 /*
2235 * mono_metadata_free_type:
2236 * @type: type to free
2237 *
2238 * Free the memory allocated for type @type which is assumed to be created by
2239 * mono_metadata_parse_type ().
2240 */
2241 void
2242 mono_metadata_free_type (MonoType *type)
2243 {
2244 if (type >= builtin_types && type < builtin_types + NBUILTIN_TYPES ())
2245 return;
2246
2247 switch (type->type){
2248 case MONO_TYPE_OBJECT:
2249 case MONO_TYPE_STRING:
2250 if (!type->data.klass)
2251 break;
2252 /* fall through */
2253 case MONO_TYPE_CLASS:
2254 case MONO_TYPE_VALUETYPE:
2255 if (type == &type->data.klass->byval_arg || type == &type->data.klass->this_arg)
2256 return;
2257 break;
2258 case MONO_TYPE_PTR:
2259 mono_metadata_free_type (type->data.type);
2260 break;
2261 case MONO_TYPE_FNPTR:
2262 mono_metadata_free_method_signature (type->data.method);
2263 break;
2264 case MONO_TYPE_ARRAY:
2265 mono_metadata_free_array (type->data.array);
2266 break;
2267 }
2268
2269 /* Allocated from a mempool, no need to free it */
2270 }
2271
2272 #if 0
2273 static void
2274 hex_dump (const char *buffer, int base, int count)
2275 {
2276 int show_header = 1;
2277 int i;
2278
2279 if (count < 0){
2280 count = -count;
2281 show_header = 0;
2282 }
2283
2284 for (i = 0; i < count; i++){
2285 if (show_header)
2286 if ((i % 16) == 0)
2287 printf ("\n0x%08x: ", (unsigned char) base + i);
2288
2289 printf ("%02x ", (unsigned char) (buffer [i]));
2290 }
2291 fflush (stdout);
2292 }
2293 #endif
2294
2295 /**
2296 * @mh: The Method header
2297 * @ptr: Points to the beginning of the Section Data (25.3)
2298 */
2299 static void
2300 parse_section_data (MonoImage *m, MonoMethodHeader *mh, const unsigned char *ptr)
2301 {
2302 unsigned char sect_data_flags;
2303 const unsigned char *sptr;
2304 int is_fat;
2305 guint32 sect_data_len;
2306
2307 while (1) {
2308 /* align on 32-bit boundary */
2309 /* FIXME: not 64-bit clean code */
2310 sptr = ptr = dword_align (ptr);
2311 sect_data_flags = *ptr;
2312 ptr++;
2313
2314 is_fat = sect_data_flags & METHOD_HEADER_SECTION_FAT_FORMAT;
2315 if (is_fat) {
2316 sect_data_len = (ptr [2] << 16) | (ptr [1] << 8) | ptr [0];
2317 ptr += 3;
2318 } else {
2319 sect_data_len = ptr [0];
2320 ++ptr;
2321 }
2322 /*
2323 g_print ("flags: %02x, len: %d\n", sect_data_flags, sect_data_len);
2324 hex_dump (sptr, 0, sect_data_len+8);
2325 g_print ("\nheader: ");
2326 hex_dump (sptr-4, 0, 4);
2327 g_print ("\n");
2328 */
2329
2330 if (sect_data_flags & METHOD_HEADER_SECTION_EHTABLE) {
2331 const unsigned char *p = dword_align (ptr);
2332 int i;
2333 mh->num_clauses = is_fat ? sect_data_len / 24: sect_data_len / 12;
2334 /* we could just store a pointer if we don't need to byteswap */
2335 mh->clauses = mono_mempool_alloc0 (m->mempool, sizeof (MonoExceptionClause) * mh->num_clauses);
2336 for (i = 0; i < mh->num_clauses; ++i) {
2337 MonoExceptionClause *ec = &mh->clauses [i];
2338 guint32 tof_value;
2339 if (is_fat) {
2340 ec->flags = read32 (p);
2341 ec->try_offset = read32 (p + 4);
2342 ec->try_len = read32 (p + 8);
2343 ec->handler_offset = read32 (p + 12);
2344 ec->handler_len = read32 (p + 16);
2345 tof_value = read32 (p + 20);
2346 p += 24;
2347 } else {
2348 ec->flags = read16 (p);
2349 ec->try_offset = read16 (p + 2);
2350 ec->try_len = *(p + 4);
2351 ec->handler_offset = read16 (p + 5);
2352 ec->handler_len = *(p + 7);
2353 tof_value = read32 (p + 8);
2354 p += 12;
2355 }
2356 if (ec->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2357 ec->data.filter_offset = tof_value;
2358 } else if (ec->flags == MONO_EXCEPTION_CLAUSE_NONE) {
2359 ec->data.catch_class = tof_value? mono_class_get (m, tof_value): 0;
2360 } else {
2361 ec->data.catch_class = NULL;
2362 }
2363 /* g_print ("try %d: %x %04x-%04x %04x\n", i, ec->flags, ec->try_offset, ec->try_offset+ec->try_len, ec->try_len); */
2364 }
2365
2366 }
2367 if (sect_data_flags & METHOD_HEADER_SECTION_MORE_SECTS)
2368 ptr += sect_data_len - 4; /* LAMESPEC: it seems the size includes the header */
2369 else
2370 return;
2371 }
2372 }
2373
2374 /*
2375 * mono_metadata_parse_mh_full:
2376 * @m: metadata context
2377 * @generic_context: generics context
2378 * @ptr: pointer to the method header.
2379 *
2380 * Decode the method header at @ptr, including pointer to the IL code,
2381 * info about local variables and optional exception tables.
2382 * This is a Mono runtime internal function.
2383 *
2384 * LOCKING: Assumes the loader lock is held.
2385 *
2386 * Returns: a MonoMethodHeader allocated from the image mempool.
2387 */
2388 MonoMethodHeader *
2389 mono_metadata_parse_mh_full (MonoImage *m, MonoGenericContainer *container, const char *ptr)
2390 {
2391 MonoMethodHeader *mh;
2392 unsigned char flags = *(const unsigned char *) ptr;
2393 unsigned char format = flags & METHOD_HEADER_FORMAT_MASK;
2394 guint16 fat_flags;
2395 guint32 local_var_sig_tok, max_stack, code_size, init_locals;
2396 const unsigned char *code;
2397 int hsize;
2398
2399 g_return_val_if_fail (ptr != NULL, NULL);
2400
2401 mono_loader_lock ();
2402 switch (format) {
2403 case METHOD_HEADER_TINY_FORMAT:
2404 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader));
2405 ptr++;
2406 mh->max_stack = 8;
2407 local_var_sig_tok = 0;
2408 mh->code_size = flags >> 2;
2409 mh->code = ptr;
2410 mono_loader_unlock ();
2411 return mh;
2412 case METHOD_HEADER_TINY_FORMAT1:
2413 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader));
2414 ptr++;
2415 mh->max_stack = 8;
2416 local_var_sig_tok = 0;
2417
2418 /*
2419 * The spec claims 3 bits, but the Beta2 is
2420 * incorrect
2421 */
2422 mh->code_size = flags >> 2;
2423 mh->code = ptr;
2424 mono_loader_unlock ();
2425 return mh;
2426 case METHOD_HEADER_FAT_FORMAT:
2427 fat_flags = read16 (ptr);
2428 ptr += 2;
2429 hsize = (fat_flags >> 12) & 0xf;
2430 max_stack = read16 (ptr);
2431 ptr += 2;
2432 code_size = read32 (ptr);
2433 ptr += 4;
2434 local_var_sig_tok = read32 (ptr);
2435 ptr += 4;
2436
2437 if (fat_flags & METHOD_HEADER_INIT_LOCALS)
2438 init_locals = 1;
2439 else
2440 init_locals = 0;
2441
2442 code = ptr;
2443
2444 if (!(fat_flags & METHOD_HEADER_MORE_SECTS))
2445 break;
2446
2447 /*
2448 * There are more sections
2449 */
2450 ptr = code + code_size;
2451 break;
2452 default:
2453 mono_loader_unlock ();
2454 return NULL;
2455 }
2456
2457 if (local_var_sig_tok) {
2458 MonoTableInfo *t = &m->tables [MONO_TABLE_STANDALONESIG];
2459 const char *locals_ptr;
2460 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
2461 int len=0, i, bsize;
2462
2463 mono_metadata_decode_row (t, (local_var_sig_tok & 0xffffff)-1, cols, 1);
2464 locals_ptr = mono_metadata_blob_heap (m, cols [MONO_STAND_ALONE_SIGNATURE]);
2465 bsize = mono_metadata_decode_blob_size (locals_ptr, &locals_ptr);
2466 if (*locals_ptr != 0x07)
2467 g_warning ("wrong signature for locals blob");
2468 locals_ptr++;
2469 len = mono_metadata_decode_value (locals_ptr, &locals_ptr);
2470 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader) + (len - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType*));
2471 mh->num_locals = len;
2472 for (i = 0; i < len; ++i) {
2473 mh->locals [i] = mono_metadata_parse_type_full (
2474 m, container, MONO_PARSE_LOCAL, 0, locals_ptr, &locals_ptr);
2475 if (!mh->locals [i]) {
2476 mono_loader_unlock ();
2477 return NULL;
2478 }
2479 }
2480 } else {
2481 mh = mono_mempool_alloc0 (m->mempool, sizeof (MonoMethodHeader));
2482 }
2483 mh->code = code;
2484 mh->code_size = code_size;
2485 mh->max_stack = max_stack;
2486 mh->init_locals = init_locals;
2487 if (fat_flags & METHOD_HEADER_MORE_SECTS)
2488 parse_section_data (m, mh, (const unsigned char*)ptr);
2489 mono_loader_unlock ();
2490 return mh;
2491 }
2492
2493 /*
2494 * mono_metadata_parse_mh:
2495 * @generic_context: generics context
2496 * @ptr: pointer to the method header.
2497 *
2498 * Decode the method header at @ptr, including pointer to the IL code,
2499 * info about local variables and optional exception tables.
2500 * This is a Mono runtime internal function.
2501 *
2502 * Returns: a MonoMethodHeader.
2503 */
2504 MonoMethodHeader *
2505 mono_metadata_parse_mh (MonoImage *m, const char *ptr)
2506 {
2507 MonoMethodHeader *res;
2508
2509 mono_loader_lock ();
2510
2511 res = mono_metadata_parse_mh_full (m, NULL, ptr);
2512
2513 mono_loader_unlock ();
2514
2515 return res;
2516 }
2517
2518 /*
2519 * mono_metadata_free_mh:
2520 * @mh: a method header
2521 *
2522 * Free the memory allocated for the method header.
2523 * This is a Mono runtime internal function.
2524 */
2525 void
2526 mono_metadata_free_mh (MonoMethodHeader *mh)
2527 {
2528 /* Allocated from the mempool */
2529 }
2530
2531 /*
2532 * mono_method_header_get_code:
2533 * @header: a MonoMethodHeader pointer
2534 * @code_size: memory location for returning the code size
2535 * @max_stack: memory location for returning the max stack
2536 *
2537 * Method header accessor to retreive info about the IL code properties:
2538 * a pointer to the IL code itself, the size of the code and the max number
2539 * of stack slots used by the code.
2540 *
2541 * Returns: pointer to the IL code represented by the method header.
2542 */
2543 const unsigned char*
2544 mono_method_header_get_code (MonoMethodHeader *header, guint32* code_size, guint32* max_stack)
2545 {
2546 if (code_size)
2547 *code_size = header->code_size;
2548 if (max_stack)
2549 *max_stack = header->max_stack;
2550 return header->code;
2551 }
2552
2553 /*
2554 * mono_method_header_get_locals:
2555 * @header: a MonoMethodHeader pointer
2556 * @num_locals: memory location for returning the number of local variables
2557 * @init_locals: memory location for returning the init_locals flag
2558 *
2559 * Method header accessor to retreive info about the local variables:
2560 * an array of local types, the number of locals and whether the locals
2561 * are supposed to be initialized to 0 on method entry
2562 *
2563 * Returns: pointer to an array of types of the local variables
2564 */
2565 MonoType**
2566 mono_method_header_get_locals (MonoMethodHeader *header, guint32* num_locals, gboolean *init_locals)
2567 {
2568 if (num_locals)
2569 *num_locals = header->num_locals;
2570 if (init_locals)
2571 *init_locals = header->init_locals;
2572 return header->locals;
2573 }
2574
2575 /*
2576 * mono_method_header_get_num_clauses:
2577 * @header: a MonoMethodHeader pointer
2578 *
2579 * Method header accessor to retreive the number of exception clauses.
2580 *
2581 * Returns: the number of exception clauses present
2582 */
2583 int
2584 mono_method_header_get_num_clauses (MonoMethodHeader *header)
2585 {
2586 return header->num_clauses;
2587 }
2588
2589 /*
2590 * mono_method_header_get_clauses:
2591 * @header: a MonoMethodHeader pointer
2592 * @method: MonoMethod the header belongs to
2593 * @iter: pointer to a iterator
2594 * @clause: pointer to a MonoExceptionClause structure which will be filled with the info
2595 *
2596 * Get the info about the exception clauses in the method. Set *iter to NULL to
2597 * initiate the iteration, then call the method repeatedly until it returns FALSE.
2598 * At each iteration, the structure pointed to by clause if filled with the
2599 * exception clause information.
2600 *
2601 * Returns: TRUE if clause was filled with info, FALSE if there are no more exception
2602 * clauses.
2603 */
2604 int
2605 mono_method_header_get_clauses (MonoMethodHeader *header, MonoMethod *method, gpointer *iter, MonoExceptionClause *clause)
2606 {
2607 MonoExceptionClause *sc;
2608 /* later we'll be able to use this interface to parse the clause info on demand,
2609 * without allocating anything.
2610 */
2611 if (!iter || !header->num_clauses)
2612 return FALSE;
2613 if (!*iter) {
2614 *iter = sc = header->clauses;
2615 *clause = *sc;
2616 return TRUE;
2617 }
2618 sc = *iter;
2619 sc++;
2620 if (sc < header->clauses + header->num_clauses) {
2621 *iter = sc;
2622 *clause = *sc;
2623 return TRUE;
2624 }
2625 return FALSE;
2626 }
2627
2628 /**
2629 * mono_metadata_parse_field_type:
2630 * @m: metadata context to extract information from
2631 * @ptr: pointer to the field signature
2632 * @rptr: pointer updated to match the end of the decoded stream
2633 *
2634 * Parses the field signature, and returns the type information for it.
2635 *
2636 * Returns: The MonoType that was extracted from @ptr.
2637 */
2638 MonoType *
2639 mono_metadata_parse_field_type (MonoImage *m, short field_flags, const char *ptr, const char **rptr)
2640 {
2641 return mono_metadata_parse_type (m, MONO_PARSE_FIELD, field_flags, ptr, rptr);
2642 }
2643
2644 /**
2645 * mono_metadata_parse_param:
2646 * @m: metadata context to extract information from
2647 * @ptr: pointer to the param signature
2648 * @rptr: pointer updated to match the end of the decoded stream
2649 *
2650 * Parses the param signature, and returns the type information for it.
2651 *
2652 * Returns: The MonoType that was extracted from @ptr.
2653 */
2654 MonoType *
2655 mono_metadata_parse_param (MonoImage *m, const char *ptr, const char **rptr)
2656 {
2657 return mono_metadata_parse_type (m, MONO_PARSE_PARAM, 0, ptr, rptr);
2658 }
2659
2660 /*
2661 * mono_metadata_token_from_dor:
2662 * @dor_token: A TypeDefOrRef coded index
2663 *
2664 * dor_token is a TypeDefOrRef coded index: it contains either
2665 * a TypeDef, TypeRef or TypeSpec in the lower bits, and the upper
2666 * bits contain an index into the table.
2667 *
2668 * Returns: an expanded token
2669 */
2670 guint32
2671 mono_metadata_token_from_dor (guint32 dor_index)
2672 {
2673 guint32 table, idx;
2674
2675 table = dor_index & 0x03;
2676 idx = dor_index >> 2;
2677
2678 switch (table){
2679 case 0: /* TypeDef */
2680 return MONO_TOKEN_TYPE_DEF | idx;
2681 case 1: /* TypeRef */
2682 return MONO_TOKEN_TYPE_REF | idx;
2683 case 2: /* TypeSpec */
2684 return MONO_TOKEN_TYPE_SPEC | idx;
2685 default:
2686 g_assert_not_reached ();
2687 }
2688
2689 return 0;
2690 }
2691
2692 /*
2693 * We use this to pass context information to the row locator
2694 */
2695 typedef struct {
2696 int idx; /* The index that we are trying to locate */
2697 int col_idx; /* The index in the row where idx may be stored */
2698 MonoTableInfo *t; /* pointer to the table */
2699 guint32 result;
2700 } locator_t;
2701
2702 /*
2703 * How the row locator works.
2704 *
2705 * Table A
2706 * ___|___
2707 * ___|___ Table B
2708 * ___|___------> _______
2709 * ___|___ _______
2710 *
2711 * A column in the rows of table A references an index in table B.
2712 * For example A may be the TYPEDEF table and B the METHODDEF table.
2713 *
2714 * Given an index in table B we want to get the row in table A
2715 * where the column n references our index in B.
2716 *
2717 * In the locator_t structure:
2718 * t is table A
2719 * col_idx is the column number
2720 * index is the index in table B
2721 * result will be the index in table A
2722 *
2723 * Examples:
2724 * Table A Table B column (in table A)
2725 * TYPEDEF METHODDEF MONO_TYPEDEF_METHOD_LIST
2726 * TYPEDEF FIELD MONO_TYPEDEF_FIELD_LIST
2727 * PROPERTYMAP PROPERTY MONO_PROPERTY_MAP_PROPERTY_LIST
2728 * INTERFIMPL TYPEDEF MONO_INTERFACEIMPL_CLASS
2729 * METHODSEM PROPERTY ASSOCIATION (encoded index)
2730 *
2731 * Note that we still don't support encoded indexes.
2732 *
2733 */
2734 static int
2735 typedef_locator (const void *a, const void *b)
2736 {
2737 locator_t *loc = (locator_t *) a;
2738 const char *bb = (const char *) b;
2739 int typedef_index = (bb - loc->t->base) / loc->t->row_size;
2740 guint32 col, col_next;
2741
2742 col = mono_metadata_decode_row_col (loc->t, typedef_index, loc->col_idx);
2743
2744 if (loc->idx < col)
2745 return -1;
2746
2747 /*
2748 * Need to check that the next row is valid.
2749 */
2750 if (typedef_index + 1 < loc->t->rows) {
2751 col_next = mono_metadata_decode_row_col (loc->t, typedef_index + 1, loc->col_idx);
2752 if (loc->idx >= col_next)
2753 return 1;
2754
2755 if (col == col_next)
2756 return 1;
2757 }
2758
2759 loc->result = typedef_index;
2760
2761 return 0;
2762 }
2763
2764 static int
2765 table_locator (const void *a, const void *b)
2766 {
2767 locator_t *loc = (locator_t *) a;
2768 const char *bb = (const char *) b;
2769 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
2770 guint32 col;
2771
2772 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
2773
2774 if (loc->idx == col) {
2775 loc->result = table_index;
2776 return 0;
2777 }
2778 if (loc->idx < col)
2779 return -1;
2780 else
2781 return 1;
2782 }
2783
2784 static int
2785 declsec_locator (const void *a, const void *b)
2786 {
2787 locator_t *loc = (locator_t *) a;
2788 const char *bb = (const char *) b;
2789 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
2790 guint32 col;
2791
2792 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
2793
2794 if (loc->idx == col) {
2795 loc->result = table_index;
2796 return 0;
2797 }
2798 if (loc->idx < col)
2799 return -1;
2800 else
2801 return 1;
2802 }
2803
2804 /**
2805 * search_ptr_table:
2806 *
2807 * Return the 1-based row index in TABLE, which must be one of the *Ptr tables,
2808 * which contains IDX.
2809 */
2810 static guint32
2811 search_ptr_table (MonoImage *image, int table, int idx)
2812 {
2813 MonoTableInfo *ptrdef = &image->tables [table];
2814 int i;
2815
2816 /* Use a linear search to find our index in the table */
2817 for (i = 0; i < ptrdef->rows; i ++)
2818 /* All the Ptr tables have the same structure */
2819 if (mono_metadata_decode_row_col (ptrdef, i, 0) == idx)
2820 break;
2821
2822 if (i < ptrdef->rows)
2823 return i + 1;
2824 else
2825 return idx;
2826 }
2827
2828 /**
2829 * mono_metadata_typedef_from_field:
2830 * @meta: metadata context
2831 * @index: FieldDef token
2832 *
2833 * Returns: the 1-based index into the TypeDef table of the type that
2834 * declared the field described by @index, or 0 if not found.
2835 */
2836 guint32
2837 mono_metadata_typedef_from_field (MonoImage *meta, guint32 index)
2838 {
2839 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
2840 locator_t loc;
2841
2842 if (!tdef->base)
2843 return 0;
2844
2845 loc.idx = mono_metadata_token_index (index);
2846 loc.col_idx = MONO_TYPEDEF_FIELD_LIST;
2847 loc.t = tdef;
2848
2849 if (meta->uncompressed_metadata)
2850 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
2851
2852 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
2853 g_assert_not_reached ();
2854
2855 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
2856 return loc.result + 1;
2857 }
2858
2859 /*
2860 * mono_metadata_typedef_from_method:
2861 * @meta: metadata context
2862 * @index: MethodDef token
2863 *
2864 * Returns: the 1-based index into the TypeDef table of the type that
2865 * declared the method described by @index. 0 if not found.
2866 */
2867 guint32
2868 mono_metadata_typedef_from_method (MonoImage *meta, guint32 index)
2869 {
2870 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
2871 locator_t loc;
2872
2873 if (!tdef->base)
2874 return 0;
2875
2876 loc.idx = mono_metadata_token_index (index);
2877 loc.col_idx = MONO_TYPEDEF_METHOD_LIST;
2878 loc.t = tdef;
2879
2880 if (meta->uncompressed_metadata)
2881 loc.idx = search_ptr_table (meta, MONO_TABLE_METHOD_POINTER, loc.idx);
2882
2883 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
2884 g_assert_not_reached ();
2885
2886 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
2887 return loc.result + 1;
2888 }
2889
2890 /*
2891 * mono_metadata_interfaces_from_typedef_full:
2892 * @meta: metadata context
2893 * @index: typedef token
2894 *
2895 * The array of interfaces that the @index typedef token implements is returned in
2896 * @interfaces. The number of elemnts in the array is returned in @count.
2897 *
2898 * LOCKING: Assumes the loader lock is held.
2899 *
2900 * Returns: TRUE on success, FALSE on failure.
2901 */
2902 gboolean
2903 mono_metadata_interfaces_from_typedef_full (MonoImage *meta, guint32 index, MonoClass ***interfaces, guint *count, MonoGenericContext *context)
2904 {
2905 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_INTERFACEIMPL];
2906 locator_t loc;
2907 guint32 start, pos;
2908 guint32 cols [MONO_INTERFACEIMPL_SIZE];
2909 MonoClass **result;
2910
2911 *interfaces = NULL;
2912 *count = 0;
2913
2914 if (!tdef->base)
2915 return TRUE;
2916
2917 loc.idx = mono_metadata_token_index (index);
2918 loc.col_idx = MONO_INTERFACEIMPL_CLASS;
2919 loc.t = tdef;
2920
2921 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
2922 return TRUE;
2923
2924 start = loc.result;
2925 /*
2926 * We may end up in the middle of the rows...
2927 */
2928 while (start > 0) {
2929 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_INTERFACEIMPL_CLASS))
2930 start--;
2931 else
2932 break;
2933 }
2934 pos = start;
2935 while (pos < tdef->rows) {
2936 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
2937 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
2938 break;
2939 ++pos;
2940 }
2941
2942 mono_loader_lock ();
2943 result = mono_mempool_alloc0 (meta->mempool, sizeof (MonoClass*) * (pos - start));
2944 mono_loader_unlock ();
2945
2946 pos = start;
2947 while (pos < tdef->rows) {
2948 MonoClass *iface;
2949
2950 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
2951 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
2952 break;
2953 iface = mono_class_get_full (
2954 meta, mono_metadata_token_from_dor (cols [MONO_INTERFACEIMPL_INTERFACE]), context);
2955 if (iface == NULL)
2956 return FALSE;
2957 result [pos - start] = iface;
2958 ++pos;
2959 }
2960 *count = pos - start;
2961 *interfaces = result;
2962 return TRUE;
2963 }
2964
2965 MonoClass**
2966 mono_metadata_interfaces_from_typedef (MonoImage *meta, guint32 index, guint *count)
2967 {
2968 MonoClass **interfaces;
2969 gboolean rv;
2970
2971 mono_loader_lock ();
2972 rv = mono_metadata_interfaces_from_typedef_full (meta, index, &interfaces, count, NULL);
2973 mono_loader_unlock ();
2974 if (rv)
2975 return interfaces;
2976 else
2977 return NULL;
2978 }
2979
2980 /*
2981 * mono_metadata_nested_in_typedef:
2982 * @meta: metadata context
2983 * @index: typedef token
2984 *
2985 * Returns: the 1-based index into the TypeDef table of the type
2986 * where the type described by @index is nested.
2987 * Retruns 0 if @index describes a non-nested type.
2988 */
2989 guint32
2990 mono_metadata_nested_in_typedef (MonoImage *meta, guint32 index)
2991 {
2992 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
2993 locator_t loc;
2994
2995 if (!tdef->base)
2996 return 0;
2997
2998 loc.idx = mono_metadata_token_index (index);
2999 loc.col_idx = MONO_NESTED_CLASS_NESTED;
3000 loc.t = tdef;
3001
3002 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3003 return 0;
3004
3005 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3006 return mono_metadata_decode_row_col (tdef, loc.result, MONO_NESTED_CLASS_ENCLOSING) | MONO_TOKEN_TYPE_DEF;
3007 }
3008
3009 /*
3010 * mono_metadata_nesting_typedef:
3011 * @meta: metadata context
3012 * @index: typedef token
3013 *
3014 * Returns: the 1-based index into the TypeDef table of the first type
3015 * that is nested inside the type described by @index. The search starts at
3016 * @start_index. returns 0 if no such type is found.
3017 */
3018 guint32
3019 mono_metadata_nesting_typedef (MonoImage *meta, guint32 index, guint32 start_index)
3020 {
3021 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
3022 guint32 start;
3023 guint32 class_index = mono_metadata_token_index (index);
3024
3025 if (!tdef->base)
3026 return 0;
3027
3028 start = start_index;
3029
3030 while (start <= tdef->rows) {
3031 if (class_index == mono_metadata_decode_row_col (tdef, start - 1, MONO_NESTED_CLASS_ENCLOSING))
3032 break;
3033 else
3034 start++;
3035 }
3036
3037 if (start > tdef->rows)
3038 return 0;
3039 else
3040 return start;
3041 }
3042
3043 /*
3044 * mono_metadata_packing_from_typedef:
3045 * @meta: metadata context
3046 * @index: token representing a type
3047 *
3048 * Returns: the info stored in the ClassLAyout table for the given typedef token
3049 * into the @packing and @size pointers.
3050 * Returns 0 if the info is not found.
3051 */
3052 guint32
3053 mono_metadata_packing_from_typedef (MonoImage *meta, guint32 index, guint32 *packing, guint32 *size)
3054 {
3055 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CLASSLAYOUT];
3056 locator_t loc;
3057 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
3058
3059 if (!tdef->base)
3060 return 0;
3061
3062 loc.idx = mono_metadata_token_index (index);
3063 loc.col_idx = MONO_CLASS_LAYOUT_PARENT;
3064 loc.t = tdef;
3065
3066 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3067 return 0;
3068
3069 mono_metadata_decode_row (tdef, loc.result, cols, MONO_CLASS_LAYOUT_SIZE);
3070 if (packing)
3071 *packing = cols [MONO_CLASS_LAYOUT_PACKING_SIZE];
3072 if (size)
3073 *size = cols [MONO_CLASS_LAYOUT_CLASS_SIZE];
3074
3075 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3076 return loc.result + 1;
3077 }
3078
3079 /*
3080 * mono_metadata_custom_attrs_from_index:
3081 * @meta: metadata context
3082 * @index: token representing the parent
3083 *
3084 * Returns: the 1-based index into the CustomAttribute table of the first
3085 * attribute which belongs to the metadata object described by @index.
3086 * Returns 0 if no such attribute is found.
3087 */
3088 guint32
3089 mono_metadata_custom_attrs_from_index (MonoImage *meta, guint32 index)
3090 {
3091 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CUSTOMATTRIBUTE];
3092 locator_t loc;
3093
3094 if (!tdef->base)
3095 return 0;
3096
3097 loc.idx = index;
3098 loc.col_idx = MONO_CUSTOM_ATTR_PARENT;
3099 loc.t = tdef;
3100
3101 /* FIXME: Index translation */
3102
3103 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3104 return 0;
3105
3106 /* Find the first entry by searching backwards */
3107 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_CUSTOM_ATTR_PARENT) == index))
3108 loc.result --;
3109
3110 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3111 return loc.result + 1;
3112 }
3113
3114 /*
3115 * mono_metadata_declsec_from_index:
3116 * @meta: metadata context
3117 * @index: token representing the parent
3118 *
3119 * Returns: the 0-based index into the DeclarativeSecurity table of the first
3120 * attribute which belongs to the metadata object described by @index.
3121 * Returns -1 if no such attribute is found.
3122 */
3123 guint32
3124 mono_metadata_declsec_from_index (MonoImage *meta, guint32 index)
3125 {
3126 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_DECLSECURITY];
3127 locator_t loc;
3128
3129 if (!tdef->base)
3130 return -1;
3131
3132 loc.idx = index;
3133 loc.col_idx = MONO_DECL_SECURITY_PARENT;
3134 loc.t = tdef;
3135
3136 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, declsec_locator))
3137 return -1;
3138
3139 /* Find the first entry by searching backwards */
3140 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_DECL_SECURITY_PARENT) == index))
3141 loc.result --;
3142
3143 return loc.result;
3144 }
3145
3146 #ifdef DEBUG
3147 static void
3148 mono_backtrace (int limit)
3149 {
3150 void *array[limit];
3151 char **names;
3152 int i;
3153 backtrace (array, limit);
3154 names = backtrace_symbols (array, limit);
3155 for (i =0; i < limit; ++i) {
3156 g_print ("\t%s\n", names [i]);
3157 }
3158 g_free (names);
3159 }
3160 #endif
3161
3162 #ifndef __GNUC__
3163 /*#define __alignof__(a) sizeof(a)*/
3164 #define __alignof__(type) G_STRUCT_OFFSET(struct { char c; type x; }, x)
3165 #endif
3166
3167 /*
3168 * mono_type_size:
3169 * @t: the type to return the size of
3170 *
3171 * Returns: the number of bytes required to hold an instance of this
3172 * type in memory
3173 */
3174 int
3175 mono_type_size (MonoType *t, int *align)
3176 {
3177 if (!t) {
3178 *align = 1;
3179 return 0;
3180 }
3181 if (t->byref) {
3182 *align = __alignof__(gpointer);
3183 return sizeof (gpointer);
3184 }
3185
3186 switch (t->type){
3187 case MONO_TYPE_VOID:
3188 *align = 1;
3189 return 0;
3190 case MONO_TYPE_BOOLEAN:
3191 *align = __alignof__(gint8);
3192 return 1;
3193 case MONO_TYPE_I1:
3194 case MONO_TYPE_U1:
3195 *align = __alignof__(gint8);
3196 return 1;
3197 case MONO_TYPE_CHAR:
3198 case MONO_TYPE_I2:
3199 case MONO_TYPE_U2:
3200 *align = __alignof__(gint16);
3201 return 2;
3202 case MONO_TYPE_I4:
3203 case MONO_TYPE_U4:
3204 *align = __alignof__(gint32);
3205 return 4;
3206 case MONO_TYPE_R4:
3207 *align = __alignof__(float);
3208 return 4;
3209 case MONO_TYPE_I8:
3210 case MONO_TYPE_U8:
3211 *align = __alignof__(gint64);
3212 return 8;
3213 case MONO_TYPE_R8:
3214 *align = __alignof__(double);
3215 return 8;
3216 case MONO_TYPE_I:
3217 case MONO_TYPE_U:
3218 *align = __alignof__(gpointer);
3219 return sizeof (gpointer);
3220 case MONO_TYPE_STRING:
3221 *align = __alignof__(gpointer);
3222 return sizeof (gpointer);
3223 case MONO_TYPE_OBJECT:
3224 *align = __alignof__(gpointer);
3225 return sizeof (gpointer);
3226 case MONO_TYPE_VALUETYPE: {
3227 if (t->data.klass->enumtype)
3228 return mono_type_size (t->data.klass->enum_basetype, align);
3229 else
3230 return mono_class_value_size (t->data.klass, align);
3231 }
3232 case MONO_TYPE_CLASS:
3233 case MONO_TYPE_SZARRAY:
3234 case MONO_TYPE_PTR:
3235 case MONO_TYPE_FNPTR:
3236 case MONO_TYPE_ARRAY:
3237 *align = __alignof__(gpointer);
3238 return sizeof (gpointer);
3239 case MONO_TYPE_TYPEDBYREF:
3240 return mono_class_value_size (mono_defaults.typed_reference_class, align);
3241 case MONO_TYPE_GENERICINST: {
3242 MonoInflatedGenericClass *gclass;
3243 MonoClass *container_class;
3244
3245 gclass = mono_get_inflated_generic_class (t->data.generic_class);
3246 // g_assert (!gclass->generic_class.inst->is_open);
3247 // g_assert (!gclass->klass->generic_container);
3248
3249 container_class = gclass->generic_class.container_class;
3250
3251 if (container_class->valuetype) {
3252 if (container_class->enumtype)
3253 return mono_type_size (container_class->enum_basetype, align);
3254 else
3255 return mono_class_value_size (gclass->klass, align);
3256 } else {
3257 *align = __alignof__(gpointer);
3258 return sizeof (gpointer);
3259 }
3260 }
3261 case MONO_TYPE_VAR:
3262 case MONO_TYPE_MVAR:
3263 /* FIXME: Martin, this is wrong. */
3264 *align = __alignof__(gpointer);
3265 return sizeof (gpointer);
3266 default:
3267 g_error ("mono_type_size: type 0x%02x unknown", t->type);
3268 }
3269 return 0;
3270 }
3271
3272 /*
3273 * mono_type_stack_size:
3274 * @t: the type to return the size it uses on the stack
3275 *
3276 * Returns: the number of bytes required to hold an instance of this
3277 * type on the runtime stack
3278 */
3279 int
3280 mono_type_stack_size (MonoType *t, int *align)
3281 {
3282 guint32 tmp;
3283
3284 g_assert (t != NULL);
3285
3286 if (!align)
3287 align = &tmp;
3288
3289 if (t->byref) {
3290 *align = __alignof__(gpointer);
3291 return sizeof (gpointer);
3292 }
3293
3294 switch (t->type){
3295 case MONO_TYPE_BOOLEAN:
3296 case MONO_TYPE_CHAR:
3297 case MONO_TYPE_I1:
3298 case MONO_TYPE_U1:
3299 case MONO_TYPE_I2:
3300 case MONO_TYPE_U2:
3301 case MONO_TYPE_I4:
3302 case MONO_TYPE_U4:
3303 case MONO_TYPE_I:
3304 case MONO_TYPE_U:
3305 case MONO_TYPE_STRING:
3306 case MONO_TYPE_OBJECT:
3307 case MONO_TYPE_CLASS:
3308 case MONO_TYPE_SZARRAY:
3309 case MONO_TYPE_PTR:
3310 case MONO_TYPE_FNPTR:
3311 case MONO_TYPE_ARRAY:
3312 *align = __alignof__(gpointer);
3313 return sizeof (gpointer);
3314 case MONO_TYPE_TYPEDBYREF:
3315 *align = __alignof__(gpointer);
3316 return sizeof (gpointer) * 3;
3317 case MONO_TYPE_R4:
3318 *align = __alignof__(float);
3319 return sizeof (float);
3320 case MONO_TYPE_I8:
3321 case MONO_TYPE_U8:
3322 *align = __alignof__(gint64);
3323 return sizeof (gint64);
3324 case MONO_TYPE_R8:
3325 *align = __alignof__(double);
3326 return sizeof (double);
3327 case MONO_TYPE_VALUETYPE: {
3328 guint32 size;
3329
3330 if (t->data.klass->enumtype)
3331 return mono_type_stack_size (t->data.klass->enum_basetype, align);
3332 else {
3333 size = mono_class_value_size (t->data.klass, align);
3334
3335 *align = *align + __alignof__(gpointer) - 1;
3336 *align &= ~(__alignof__(gpointer) - 1);
3337
3338 size += sizeof (gpointer) - 1;
3339 size &= ~(sizeof (gpointer) - 1);
3340
3341 return size;
3342 }
3343 }
3344 case MONO_TYPE_GENERICINST: {
3345 MonoInflatedGenericClass *gclass;
3346 MonoClass *container_class;
3347
3348 gclass = mono_get_inflated_generic_class (t->data.generic_class);
3349 container_class = gclass->generic_class.container_class;
3350
3351 g_assert (!gclass->generic_class.inst->is_open);
3352 g_assert (!gclass->klass->generic_container);
3353
3354 if (container_class->valuetype) {
3355 if (container_class->enumtype)
3356 return mono_type_stack_size (container_class->enum_basetype, align);
3357 else {
3358 guint32 size = mono_class_value_size (gclass->klass, align);
3359
3360 *align = *align + __alignof__(gpointer) - 1;
3361 *align &= ~(__alignof__(gpointer) - 1);
3362
3363 size += sizeof (gpointer) - 1;
3364 size &= ~(sizeof (gpointer) - 1);
3365
3366 return size;
3367 }
3368 } else {
3369 *align = __alignof__(gpointer);
3370 return sizeof (gpointer);
3371 }
3372 }
3373 default:
3374 g_error ("type 0x%02x unknown", t->type);
3375 }
3376 return 0;
3377 }
3378
3379 gboolean
3380 mono_type_generic_inst_is_valuetype (MonoType *type)
3381 {
3382 g_assert (type->type == MONO_TYPE_GENERICINST);
3383 return type->data.generic_class->container_class->valuetype;
3384 }
3385
3386 gboolean
3387 mono_metadata_generic_class_is_valuetype (MonoGenericClass *gclass)
3388 {
3389 return gclass->container_class->valuetype;
3390 }
3391
3392 static gboolean
3393 _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2, gboolean signature_only)
3394 {
3395 int i;
3396
3397 if ((g1->inst->type_argc != g2->inst->type_argc) || (g1->is_dynamic != g2->is_dynamic) ||
3398 (g1->inst->is_reference != g2->inst->is_reference))
3399 return FALSE;
3400 if (!mono_metadata_class_equal (g1->container_class, g2->container_class, signature_only))
3401 return FALSE;
3402 for (i = 0; i < g1->inst->type_argc; ++i) {
3403 if (!do_mono_metadata_type_equal (g1->inst->type_argv [i], g2->inst->type_argv [i], signature_only))
3404 return FALSE;
3405 }
3406 return TRUE;
3407 }
3408
3409 guint
3410 mono_metadata_generic_method_hash (MonoGenericMethod *gmethod)
3411 {
3412 return gmethod->inst->id;
3413 }
3414
3415 gboolean
3416 mono_metadata_generic_method_equal (MonoGenericMethod *g1, MonoGenericMethod *g2)
3417 {
3418 return (g1->container == g2->container) && (g1->generic_class == g2->generic_class) &&
3419 (g1->inst == g2->inst);
3420 }
3421
3422
3423 /*
3424 * mono_metadata_type_hash:
3425 * @t1: a type
3426 *
3427 * Computes an hash value for @t1 to be used in GHashTable.
3428 */
3429 guint
3430 mono_metadata_type_hash (MonoType *t1)
3431 {
3432 guint hash = t1->type;
3433
3434 hash |= t1->byref << 6; /* do not collide with t1->type values */
3435 switch (t1->type) {
3436 case MONO_TYPE_VALUETYPE:
3437 case MONO_TYPE_CLASS:
3438 case MONO_TYPE_SZARRAY:
3439 /* check if the distribution is good enough */
3440 return ((hash << 5) - hash) ^ g_str_hash (t1->data.klass->name);
3441 case MONO_TYPE_PTR:
3442 return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
3443 case MONO_TYPE_ARRAY:
3444 return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
3445 case MONO_TYPE_GENERICINST:
3446 return ((hash << 5) - hash) ^ mono_generic_class_hash (t1->data.generic_class);
3447 }
3448 return hash;
3449 }
3450
3451 static gboolean
3452 mono_metadata_generic_param_equal (MonoGenericParam *p1, MonoGenericParam *p2, gboolean signature_only)
3453 {
3454 if (p1 == p2)
3455 return TRUE;
3456 if (p1->num != p2->num)
3457 return FALSE;
3458
3459 if (p1->owner == p2->owner)
3460 return TRUE;
3461
3462 /*
3463 * If `signature_only' is true, we're comparing two (method) signatures.
3464 * In this case, the owner of two type parameters doesn't need to match.
3465 */
3466
3467 return signature_only;
3468 }
3469
3470 static gboolean
3471 mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only)
3472 {
3473 if (c1 == c2)
3474 return TRUE;
3475 if (c1->generic_class && c2->generic_class)
3476 return _mono_metadata_generic_class_equal (c1->generic_class, c2->generic_class, signature_only);
3477 if ((c1->byval_arg.type == MONO_TYPE_VAR) && (c2->byval_arg.type == MONO_TYPE_VAR))
3478 return mono_metadata_generic_param_equal (
3479 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
3480 if ((c1->byval_arg.type == MONO_TYPE_MVAR) && (c2->byval_arg.type == MONO_TYPE_MVAR))
3481 return mono_metadata_generic_param_equal (
3482 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
3483 if (signature_only &&
3484 (c1->byval_arg.type == MONO_TYPE_SZARRAY) && (c2->byval_arg.type == MONO_TYPE_SZARRAY))
3485 return mono_metadata_class_equal (c1->byval_arg.data.klass, c2->byval_arg.data.klass, signature_only);
3486 return FALSE;
3487 }
3488
3489 static gboolean
3490 mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only)
3491 {
3492 gpointer iter1 = 0, iter2 = 0;
3493
3494 if (s1 == s2)
3495 return TRUE;
3496 if (s1->call_convention != s2->call_convention)
3497 return FALSE;
3498 if (s1->sentinelpos != s2->sentinelpos)
3499 return FALSE;
3500 if (s1->hasthis != s2->hasthis)
3501 return FALSE;
3502 if (s1->explicit_this != s2->explicit_this)
3503 return FALSE;
3504 if (! do_mono_metadata_type_equal (s1->ret, s2->ret, signature_only))
3505 return FALSE;
3506 if (s1->param_count != s2->param_count)
3507 return FALSE;
3508
3509 while (TRUE) {
3510 MonoType *t1 = mono_signature_get_params (s1, &iter1);
3511 MonoType *t2 = mono_signature_get_params (s2, &iter2);
3512
3513 if (t1 == NULL || t2 == NULL)
3514 return (t1 == t2);
3515 if (! do_mono_metadata_type_equal (t1, t2, signature_only))
3516 return FALSE;
3517 }
3518 }
3519
3520 /*
3521 * mono_metadata_type_equal:
3522 * @t1: a type
3523 * @t2: another type
3524 *
3525 * Determine if @t1 and @t2 represent the same type.
3526 * Returns: #TRUE if @t1 and @t2 are equal.
3527 */
3528 static gboolean
3529 do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only)
3530 {
3531 if (t1->type != t2->type || t1->byref != t2->byref)
3532 return FALSE;
3533
3534 switch (t1->type) {
3535 case MONO_TYPE_VOID:
3536 case MONO_TYPE_BOOLEAN:
3537 case MONO_TYPE_CHAR:
3538 case MONO_TYPE_I1:
3539 case MONO_TYPE_U1:
3540 case MONO_TYPE_I2:
3541 case MONO_TYPE_U2:
3542 case MONO_TYPE_I4:
3543 case MONO_TYPE_U4:
3544 case MONO_TYPE_I8:
3545 case MONO_TYPE_U8:
3546 case MONO_TYPE_R4:
3547 case MONO_TYPE_R8:
3548 case MONO_TYPE_STRING:
3549 case MONO_TYPE_I:
3550 case MONO_TYPE_U:
3551 case MONO_TYPE_OBJECT:
3552 case MONO_TYPE_TYPEDBYREF:
3553 return TRUE;
3554 case MONO_TYPE_VALUETYPE:
3555 case MONO_TYPE_CLASS:
3556 case MONO_TYPE_SZARRAY:
3557 return mono_metadata_class_equal (t1->data.klass, t2->data.klass, signature_only);
3558 case MONO_TYPE_PTR:
3559 return do_mono_metadata_type_equal (t1->data.type, t2->data.type, signature_only);
3560 case MONO_TYPE_ARRAY:
3561 if (t1->data.array->rank != t2->data.array->rank)
3562 return FALSE;
3563 return mono_metadata_class_equal (t1->data.array->eklass, t2->data.array->eklass, signature_only);
3564 case MONO_TYPE_GENERICINST:
3565 return _mono_metadata_generic_class_equal (
3566 t1->data.generic_class, t2->data.generic_class, signature_only);
3567 case MONO_TYPE_VAR:
3568 return mono_metadata_generic_param_equal (
3569 t1->data.generic_param, t2->data.generic_param, signature_only);
3570 case MONO_TYPE_MVAR:
3571 return mono_metadata_generic_param_equal (
3572 t1->data.generic_param, t2->data.generic_param, signature_only);
3573 case MONO_TYPE_FNPTR:
3574 return mono_metadata_fnptr_equal (t1->data.method, t2->data.method, signature_only);
3575 default:
3576 g_error ("implement type compare for %0x!", t1->type);
3577 return FALSE;
3578 }
3579
3580 return FALSE;
3581 }
3582
3583 gboolean
3584 mono_metadata_type_equal (MonoType *t1, MonoType *t2)
3585 {
3586 return do_mono_metadata_type_equal (t1, t2, FALSE);
3587 }
3588
3589 /**
3590 * mono_metadata_signature_equal:
3591 * @sig1: a signature
3592 * @sig2: another signature
3593 *
3594 * Determine if @sig1 and @sig2 represent the same signature, with the
3595 * same number of arguments and the same types.
3596 * Returns: #TRUE if @sig1 and @sig2 are equal.
3597 */
3598 gboolean
3599 mono_metadata_signature_equal (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
3600 {
3601 int i;
3602
3603 if (sig1->hasthis != sig2->hasthis || sig1->param_count != sig2->param_count)
3604 return FALSE;
3605
3606 /*
3607 * We're just comparing the signatures of two methods here:
3608 *
3609 * If we have two generic methods `void Foo<U> (U u)' and `void Bar<V> (V v)',
3610 * U and V are equal here.
3611 *
3612 * That's what the `signature_only' argument of do_mono_metadata_type_equal() is for.
3613 */
3614
3615 for (i = 0; i < sig1->param_count; i++) {
3616 MonoType *p1 = sig1->params[i];
3617 MonoType *p2 = sig2->params[i];
3618
3619 /* if (p1->attrs != p2->attrs)
3620 return FALSE;
3621 */
3622 if (!do_mono_metadata_type_equal (p1, p2, TRUE))
3623 return FALSE;
3624 }
3625
3626 if (!do_mono_metadata_type_equal (sig1->ret, sig2->ret, TRUE))
3627 return FALSE;
3628 return TRUE;
3629 }
3630
3631 /**
3632 * mono_metadata_type_dup_mp:
3633 * @image: image type is defined in
3634 * @original: type to duplicate
3635 *
3636 * Returns: copy of type allocated from mempool.
3637 */
3638 MonoType *
3639 mono_metadata_type_dup_mp (MonoImage *image, const MonoType *original)
3640 {
3641 MonoType *r = NULL;
3642 mono_loader_lock ();
3643 r = mono_mempool_alloc0 (image->mempool, sizeof(MonoType));
3644 mono_loader_unlock ();
3645 *r = *original;
3646 /* FIXME: we don't handle these yet because they need to duplicate memory
3647 * but the current routines used are not using the mempools
3648 */
3649 if (original->type == MONO_TYPE_PTR ||
3650 original->type == MONO_TYPE_ARRAY ||
3651 original->type == MONO_TYPE_FNPTR)
3652 g_assert_not_reached ();
3653 return r;
3654 }
3655
3656 guint
3657 mono_signature_hash (MonoMethodSignature *sig)
3658 {
3659 guint i, res = sig->ret->type;
3660
3661 for (i = 0; i < sig->param_count; i++)
3662 res = (res << 5) - res + mono_type_hash (sig->params[i]);
3663
3664 return res;
3665 }
3666
3667 /*
3668 * mono_metadata_encode_value:
3669 * @value: value to encode
3670 * @buf: buffer where to write the compressed representation
3671 * @endbuf: pointer updated to point at the end of the encoded output
3672 *
3673 * Encodes the value @value in the compressed representation used
3674 * in metadata and stores the result in @buf. @buf needs to be big
3675 * enough to hold the data (4 bytes).
3676 */
3677 void
3678 mono_metadata_encode_value (guint32 value, char *buf, char **endbuf)
3679 {
3680 char *p = buf;
3681
3682 if (value < 0x80)
3683 *p++ = value;
3684 else if (value < 0x4000) {
3685 p [0] = 0x80 | (value >> 8);
3686 p [1] = value & 0xff;
3687 p += 2;
3688 } else {
3689 p [0] = (value >> 24) | 0xc0;
3690 p [1] = (value >> 16) & 0xff;
3691 p [2] = (value >> 8) & 0xff;
3692 p [3] = value & 0xff;
3693 p += 4;
3694 }
3695 if (endbuf)
3696 *endbuf = p;
3697 }
3698
3699 /*
3700 * mono_metadata_field_info:
3701 * @meta: the Image the field is defined in
3702 * @index: the index in the field table representing the field
3703 * @offset: a pointer to an integer where to store the offset that
3704 * may have been specified for the field in a FieldLayout table
3705 * @rva: a pointer to the RVA of the field data in the image that
3706 * may have been defined in a FieldRVA table
3707 * @marshal_spec: a pointer to the marshal spec that may have been
3708 * defined for the field in a FieldMarshal table.
3709 *
3710 * Gather info for field @index that may have been defined in the FieldLayout,
3711 * FieldRVA and FieldMarshal tables.
3712 * Either of offset, rva and marshal_spec can be NULL if you're not interested
3713 * in the data.
3714 */
3715 void
3716 mono_metadata_field_info (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
3717 MonoMarshalSpec **marshal_spec)
3718 {
3719 MonoTableInfo *tdef;
3720 locator_t loc;
3721
3722 loc.idx = index + 1;
3723 if (meta->uncompressed_metadata)
3724 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
3725
3726 if (offset) {
3727 tdef = &meta->tables [MONO_TABLE_FIELDLAYOUT];
3728
3729 loc.col_idx = MONO_FIELD_LAYOUT_FIELD;
3730 loc.t = tdef;
3731
3732 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
3733 *offset = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_LAYOUT_OFFSET);
3734 } else {
3735 *offset = (guint32)-1;
3736 }
3737 }
3738 if (rva) {
3739 tdef = &meta->tables [MONO_TABLE_FIELDRVA];
3740
3741 loc.col_idx = MONO_FIELD_RVA_FIELD;
3742 loc.t = tdef;
3743
3744 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
3745 /*
3746 * LAMESPEC: There is no signature, no nothing, just the raw data.
3747 */
3748 *rva = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_RVA_RVA);
3749 } else {
3750 *rva = 0;
3751 }
3752 }
3753 if (marshal_spec) {
3754 const char *p;
3755
3756 if ((p = mono_metadata_get_marshal_info (meta, index, TRUE))) {
3757 *marshal_spec = mono_metadata_parse_marshal_spec (meta, p);
3758 }
3759 }
3760
3761 }
3762
3763 /*
3764 * mono_metadata_get_constant_index:
3765 * @meta: the Image the field is defined in
3766 * @index: the token that may have a row defined in the constants table
3767 * @hint: possible position for the row
3768 *
3769 * @token must be a FieldDef, ParamDef or PropertyDef token.
3770 *
3771 * Returns: the index into the Constants table or 0 if not found.
3772 */
3773 guint32
3774 mono_metadata_get_constant_index (MonoImage *meta, guint32 token, guint32 hint)
3775 {
3776 MonoTableInfo *tdef;
3777 locator_t loc;
3778 guint32 index = mono_metadata_token_index (token);
3779
3780 tdef = &meta->tables [MONO_TABLE_CONSTANT];
3781 index <<= MONO_HASCONSTANT_BITS;
3782 switch (mono_metadata_token_table (token)) {
3783 case MONO_TABLE_FIELD:
3784 index |= MONO_HASCONSTANT_FIEDDEF;
3785 break;
3786 case MONO_TABLE_PARAM:
3787 index |= MONO_HASCONSTANT_PARAM;
3788 break;
3789 case MONO_TABLE_PROPERTY:
3790 index |= MONO_HASCONSTANT_PROPERTY;
3791 break;
3792 default:
3793 g_warning ("Not a valid token for the constant table: 0x%08x", token);
3794 return 0;
3795 }
3796 loc.idx = index;
3797 loc.col_idx = MONO_CONSTANT_PARENT;
3798 loc.t = tdef;
3799
3800 /* FIXME: Index translation */
3801
3802 if ((hint > 0) && (hint < tdef->rows) && (mono_metadata_decode_row_col (tdef, hint - 1, MONO_CONSTANT_PARENT) == index))
3803 return hint;
3804
3805 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
3806 return loc.result + 1;
3807 }
3808 return 0;
3809 }
3810
3811 /*
3812 * mono_metadata_events_from_typedef:
3813 * @meta: metadata context
3814 * @index: 0-based index (in the TypeDef table) describing a type
3815 *
3816 * Returns: the 0-based index in the Event table for the events in the
3817 * type. The last event that belongs to the type (plus 1) is stored
3818 * in the @end_idx pointer.
3819 */
3820 guint32
3821 mono_metadata_events_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
3822 {
3823 locator_t loc;
3824 guint32 start, end;
3825 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_EVENTMAP];
3826
3827 *end_idx = 0;
3828
3829 if (!tdef->base)
3830 return 0;
3831
3832 loc.t = tdef;
3833 loc.col_idx = MONO_EVENT_MAP_PARENT;
3834 loc.idx = index + 1;
3835
3836 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3837 return 0;
3838
3839 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_EVENT_MAP_EVENTLIST);
3840 if (loc.result + 1 < tdef->rows) {
3841 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_EVENT_MAP_EVENTLIST) - 1;
3842 } else {
3843 end = meta->tables [MONO_TABLE_EVENT].rows;
3844 }
3845
3846 *end_idx = end;
3847 return start - 1;
3848 }
3849
3850 /*
3851 * mono_metadata_methods_from_event:
3852 * @meta: metadata context
3853 * @index: 0-based index (in the Event table) describing a event
3854 *
3855 * Returns: the 0-based index in the MethodDef table for the methods in the
3856 * event. The last method that belongs to the event (plus 1) is stored
3857 * in the @end_idx pointer.
3858 */
3859 guint32
3860 mono_metadata_methods_from_event (MonoImage *meta, guint32 index, guint *end_idx)
3861 {
3862 locator_t loc;
3863 guint start, end;
3864 guint32 cols [MONO_METHOD_SEMA_SIZE];
3865 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
3866
3867 *end_idx = 0;
3868 if (!msemt->base)
3869 return 0;
3870
3871 if (meta->uncompressed_metadata)
3872 index = search_ptr_table (meta, MONO_TABLE_EVENT_POINTER, index + 1) - 1;
3873
3874 loc.t = msemt;
3875 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
3876 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_EVENT; /* Method association coded index */
3877
3878 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
3879 return 0;
3880
3881 start = loc.result;
3882 /*
3883 * We may end up in the middle of the rows...
3884 */
3885 while (start > 0) {
3886 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
3887 start--;
3888 else
3889 break;
3890 }
3891 end = start + 1;
3892 while (end < msemt->rows) {
3893 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
3894 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
3895 break;
3896 ++end;
3897 }
3898 *end_idx = end;
3899 return start;
3900 }
3901
3902 /*
3903 * mono_metadata_properties_from_typedef:
3904 * @meta: metadata context
3905 * @index: 0-based index (in the TypeDef table) describing a type
3906 *
3907 * Returns: the 0-based index in the Property table for the properties in the
3908 * type. The last property that belongs to the type (plus 1) is stored
3909 * in the @end_idx pointer.
3910 */
3911 guint32
3912 mono_metadata_properties_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
3913 {
3914 locator_t loc;
3915 guint32 start, end;
3916 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_PROPERTYMAP];
3917
3918 *end_idx = 0;
3919
3920 if (!tdef->base)
3921 return 0;
3922
3923 loc.t = tdef;
3924 loc.col_idx = MONO_PROPERTY_MAP_PARENT;
3925 loc.idx = index + 1;
3926
3927 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3928 return 0;
3929
3930 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_PROPERTY_MAP_PROPERTY_LIST);
3931 if (loc.result + 1 < tdef->rows) {
3932 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_PROPERTY_MAP_PROPERTY_LIST) - 1;
3933 } else {
3934 end = meta->tables [MONO_TABLE_PROPERTY].rows;
3935 }
3936
3937 *end_idx = end;
3938 return start - 1;
3939 }
3940
3941 /*
3942 * mono_metadata_methods_from_property:
3943 * @meta: metadata context
3944 * @index: 0-based index (in the PropertyDef table) describing a property
3945 *
3946 * Returns: the 0-based index in the MethodDef table for the methods in the
3947 * property. The last method that belongs to the property (plus 1) is stored
3948 * in the @end_idx pointer.
3949 */
3950 guint32
3951 mono_metadata_methods_from_property (MonoImage *meta, guint32 index, guint *end_idx)
3952 {
3953 locator_t loc;
3954 guint start, end;
3955 guint32 cols [MONO_METHOD_SEMA_SIZE];
3956 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
3957
3958 *end_idx = 0;
3959 if (!msemt->base)
3960 return 0;
3961
3962 if (meta->uncompressed_metadata)
3963 index = search_ptr_table (meta, MONO_TABLE_PROPERTY_POINTER, index + 1) - 1;
3964
3965 loc.t = msemt;
3966 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
3967 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_PROPERTY; /* Method association coded index */
3968
3969 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
3970 return 0;
3971
3972 start = loc.result;
3973 /*
3974 * We may end up in the middle of the rows...
3975 */
3976 while (start > 0) {
3977 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
3978 start--;
3979 else
3980 break;
3981 }
3982 end = start + 1;
3983 while (end < msemt->rows) {
3984 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
3985 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
3986 break;
3987 ++end;
3988 }
3989 *end_idx = end;
3990 return start;
3991 }
3992
3993 guint32
3994 mono_metadata_implmap_from_method (MonoImage *meta, guint32 method_idx)
3995 {
3996 locator_t loc;
3997 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_IMPLMAP];
3998
3999 if (!tdef->base)
4000 return 0;
4001
4002 /* No index translation seems to be needed */
4003
4004 loc.t = tdef;
4005 loc.col_idx = MONO_IMPLMAP_MEMBER;
4006 loc.idx = ((method_idx + 1) << MONO_MEMBERFORWD_BITS) | MONO_MEMBERFORWD_METHODDEF;
4007
4008 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4009 return 0;
4010
4011 return loc.result + 1;
4012 }
4013
4014 /**
4015 * @image: context where the image is created
4016 * @type_spec: typespec token
4017 *
4018 * Creates a MonoType representing the TypeSpec indexed by the @type_spec
4019 * token.
4020 */
4021 MonoType *
4022 mono_type_create_from_typespec (MonoImage *image, guint32 type_spec)
4023 {
4024 guint32 idx = mono_metadata_token_index (type_spec);
4025 MonoTableInfo *t;
4026 guint32 cols [MONO_TYPESPEC_SIZE];
4027 const char *ptr;
4028 guint32 len;
4029 MonoType *type;
4030
4031 mono_loader_lock ();
4032
4033 type = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4034 if (type) {
4035 mono_loader_unlock ();
4036 return type;
4037 }
4038
4039 t = &image->tables [MONO_TABLE_TYPESPEC];
4040
4041 mono_metadata_decode_row (t, idx-1, cols, MONO_TYPESPEC_SIZE);
4042 ptr = mono_metadata_blob_heap (image, cols [MONO_TYPESPEC_SIGNATURE]);
4043 len = mono_metadata_decode_value (ptr, &ptr);
4044
4045 type = g_new0 (MonoType, 1);
4046
4047 g_hash_table_insert (image->typespec_cache, GUINT_TO_POINTER (type_spec), type);
4048
4049 if (*ptr == MONO_TYPE_BYREF) {
4050 type->byref = 1;
4051 ptr++;
4052 }
4053
4054 if (!do_mono_metadata_parse_type (type, image, NULL, ptr, &ptr)) {
4055 g_hash_table_remove (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4056 g_free (type);
4057 mono_loader_unlock ();
4058 return NULL;
4059 }
4060
4061 mono_loader_unlock ();
4062
4063 return type;
4064 }
4065
4066 MonoMarshalSpec *
4067 mono_metadata_parse_marshal_spec (MonoImage *image, const char *ptr)
4068 {
4069 MonoMarshalSpec *res;
4070 int len;
4071 const char *start = ptr;
4072
4073 /* fixme: this is incomplete, but I cant find more infos in the specs */
4074
4075 res = g_new0 (MonoMarshalSpec, 1);
4076
4077 len = mono_metadata_decode_value (ptr, &ptr);
4078 res->native = *ptr++;
4079
4080 if (res->native == MONO_NATIVE_LPARRAY) {
4081 res->data.array_data.param_num = -1;
4082 res->data.array_data.num_elem = -1;
4083 res->data.array_data.elem_mult = -1;
4084
4085 if (ptr - start <= len)
4086 res->data.array_data.elem_type = *ptr++;
4087 if (ptr - start <= len)
4088 res->data.array_data.param_num = mono_metadata_decode_value (ptr, &ptr);
4089 if (ptr - start <= len)
4090 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4091 if (ptr - start <= len) {
4092 /*
4093 * LAMESPEC: Older spec versions say this parameter comes before
4094 * num_elem. Never spec versions don't talk about elem_mult at
4095 * all, but csc still emits it, and it is used to distinguish
4096 * between param_num being 0, and param_num being omitted.
4097 * So if (param_num == 0) && (num_elem > 0), then
4098 * elem_mult == 0 -> the array size is num_elem
4099 * elem_mult == 1 -> the array size is @param_num + num_elem
4100 */
4101 res->data.array_data.elem_mult = mono_metadata_decode_value (ptr, &ptr);
4102 }
4103 }
4104
4105 if (res->native == MONO_NATIVE_BYVALTSTR) {
4106 if (ptr - start <= len)
4107 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4108 }
4109
4110 if (res->native == MONO_NATIVE_BYVALARRAY) {
4111 if (ptr - start <= len)
4112 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4113 }
4114
4115 if (res->native == MONO_NATIVE_CUSTOM) {
4116 /* skip unused type guid */
4117 len = mono_metadata_decode_value (ptr, &ptr);
4118 ptr += len;
4119 /* skip unused native type name */
4120 len = mono_metadata_decode_value (ptr, &ptr);
4121 ptr += len;
4122 /* read custom marshaler type name */
4123 len = mono_metadata_decode_value (ptr, &ptr);
4124 res->data.custom_data.custom_name = g_strndup (ptr, len);
4125 ptr += len;
4126 /* read cookie string */
4127 len = mono_metadata_decode_value (ptr, &ptr);
4128 res->data.custom_data.cookie = g_strndup (ptr, len);
4129 }
4130
4131 if (res->native == MONO_NATIVE_SAFEARRAY) {
4132 res->data.safearray_data.elem_type = 0;
4133 res->data.safearray_data.num_elem = 0;
4134 if (ptr - start <= len)
4135 res->data.safearray_data.elem_type = *ptr++;
4136 if (ptr - start <= len)
4137 res->data.safearray_data.num_elem = *ptr++;
4138 }
4139 return res;
4140 }
4141
4142 void
4143 mono_metadata_free_marshal_spec (MonoMarshalSpec *spec)
4144 {
4145 if (spec->native == MONO_NATIVE_CUSTOM) {
4146 g_free (spec->data.custom_data.custom_name);
4147 g_free (spec->data.custom_data.cookie);
4148 }
4149 g_free (spec);
4150 }
4151
4152 guint32
4153 mono_type_to_unmanaged (MonoType *type, MonoMarshalSpec *mspec, gboolean as_field,
4154 gboolean unicode, MonoMarshalConv *conv)
4155 {
4156 MonoMarshalConv dummy_conv;
4157 int t = type->type;
4158
4159 if (!conv)
4160 conv = &dummy_conv;
4161
4162 *conv = MONO_MARSHAL_CONV_NONE;
4163
4164 if (type->byref)
4165 return MONO_NATIVE_UINT;
4166
4167 handle_enum:
4168 switch (t) {
4169 case MONO_TYPE_BOOLEAN:
4170 if (mspec) {
4171 switch (mspec->native) {
4172 case MONO_NATIVE_VARIANTBOOL:
4173 *conv = MONO_MARSHAL_CONV_BOOL_VARIANTBOOL;
4174 return MONO_NATIVE_VARIANTBOOL;
4175 case MONO_NATIVE_BOOLEAN:
4176 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4177 return MONO_NATIVE_BOOLEAN;
4178 case MONO_NATIVE_I1:
4179 case MONO_NATIVE_U1:
4180 return mspec->native;
4181 default:
4182 g_error ("cant marshal bool to native type %02x", mspec->native);
4183 }
4184 }
4185 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4186 return MONO_NATIVE_BOOLEAN;
4187 case MONO_TYPE_CHAR: return MONO_NATIVE_U2;
4188 case MONO_TYPE_I1: return MONO_NATIVE_I1;
4189 case MONO_TYPE_U1: return MONO_NATIVE_U1;
4190 case MONO_TYPE_I2: return MONO_NATIVE_I2;
4191 case MONO_TYPE_U2: return MONO_NATIVE_U2;
4192 case MONO_TYPE_I4: return MONO_NATIVE_I4;
4193 case MONO_TYPE_U4: return MONO_NATIVE_U4;
4194 case MONO_TYPE_I8: return MONO_NATIVE_I8;
4195 case MONO_TYPE_U8: return MONO_NATIVE_U8;
4196 case MONO_TYPE_R4: return MONO_NATIVE_R4;
4197 case MONO_TYPE_R8: return MONO_NATIVE_R8;
4198 case MONO_TYPE_STRING:
4199 if (mspec) {
4200 switch (mspec->native) {
4201 case MONO_NATIVE_BSTR:
4202 *conv = MONO_MARSHAL_CONV_STR_BSTR;
4203 return MONO_NATIVE_BSTR;
4204 case MONO_NATIVE_LPSTR:
4205 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
4206 return MONO_NATIVE_LPSTR;
4207 case MONO_NATIVE_LPWSTR:
4208 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
4209 return MONO_NATIVE_LPWSTR;
4210 case MONO_NATIVE_LPTSTR:
4211 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
4212 return MONO_NATIVE_LPTSTR;
4213 case MONO_NATIVE_ANSIBSTR:
4214 *conv = MONO_MARSHAL_CONV_STR_ANSIBSTR;
4215 return MONO_NATIVE_ANSIBSTR;
4216 case MONO_NATIVE_TBSTR:
4217 *conv = MONO_MARSHAL_CONV_STR_TBSTR;
4218 return MONO_NATIVE_TBSTR;
4219 case MONO_NATIVE_BYVALTSTR:
4220 if (unicode)
4221 *conv = MONO_MARSHAL_CONV_STR_BYVALWSTR;
4222 else
4223 *conv = MONO_MARSHAL_CONV_STR_BYVALSTR;
4224 return MONO_NATIVE_BYVALTSTR;
4225 default:
4226 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);
4227 }
4228 }
4229 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
4230 return MONO_NATIVE_LPTSTR;
4231 case MONO_TYPE_PTR: return MONO_NATIVE_UINT;
4232 case MONO_TYPE_VALUETYPE: /*FIXME*/
4233 if (type->data.klass->enumtype) {
4234 t = type->data.klass->enum_basetype->type;
4235 goto handle_enum;
4236 }
4237 return MONO_NATIVE_STRUCT;
4238 case MONO_TYPE_SZARRAY:
4239 case MONO_TYPE_ARRAY:
4240 if (mspec) {
4241 switch (mspec->native) {
4242 case MONO_NATIVE_BYVALARRAY:
4243 if ((type->data.klass->element_class == mono_defaults.char_class) && !unicode)
4244 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALCHARARRAY;
4245 else
4246 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALARRAY;
4247 return MONO_NATIVE_BYVALARRAY;
4248 case MONO_NATIVE_SAFEARRAY:
4249 *conv = MONO_MARSHAL_CONV_ARRAY_SAVEARRAY;
4250 return MONO_NATIVE_SAFEARRAY;
4251 case MONO_NATIVE_LPARRAY:
4252 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4253 return MONO_NATIVE_LPARRAY;
4254 default:
4255 g_error ("cant marshal array as native type %02x", mspec->native);
4256 }
4257 }
4258
4259 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4260 return MONO_NATIVE_LPARRAY;
4261 case MONO_TYPE_I: return MONO_NATIVE_INT;
4262 case MONO_TYPE_U: return MONO_NATIVE_UINT;
4263 case MONO_TYPE_CLASS:
4264 case MONO_TYPE_OBJECT: {
4265 /* FIXME : we need to handle ArrayList and StringBuilder here, probably */
4266 if (mspec) {
4267 switch (mspec->native) {
4268 case MONO_NATIVE_STRUCT:
4269 return MONO_NATIVE_STRUCT;
4270 case MONO_NATIVE_INTERFACE:
4271 *conv = MONO_MARSHAL_CONV_OBJECT_INTERFACE;
4272 return MONO_NATIVE_INTERFACE;
4273 case MONO_NATIVE_IDISPATCH:
4274 *conv = MONO_MARSHAL_CONV_OBJECT_IDISPATCH;
4275 return MONO_NATIVE_IDISPATCH;
4276 case MONO_NATIVE_IUNKNOWN:
4277 *conv = MONO_MARSHAL_CONV_OBJECT_IUNKNOWN;
4278 return MONO_NATIVE_IUNKNOWN;
4279 case MONO_NATIVE_FUNC:
4280 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4281 type->data.klass == mono_defaults.delegate_class ||
4282 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4283 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4284 return MONO_NATIVE_FUNC;
4285 }
4286 /* Fall through */
4287 default:
4288 g_error ("cant marshal object as native type %02x", mspec->native);
4289 }
4290 }
4291 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4292 type->data.klass == mono_defaults.delegate_class ||
4293 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4294 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4295 return MONO_NATIVE_FUNC;
4296 }
4297 *conv = MONO_MARSHAL_CONV_OBJECT_STRUCT;
4298 return MONO_NATIVE_STRUCT;
4299 }
4300 case MONO_TYPE_FNPTR: return MONO_NATIVE_FUNC;
4301 case MONO_TYPE_GENERICINST:
4302 type = &type->data.generic_class->container_class->byval_arg;
4303 t = type->type;
4304 goto handle_enum;
4305 case MONO_TYPE_TYPEDBYREF:
4306 default:
4307 g_error ("type 0x%02x not handled in marshal", t);
4308 }
4309 return MONO_NATIVE_MAX;
4310 }
4311
4312 const char*
4313 mono_metadata_get_marshal_info (MonoImage *meta, guint32 idx, gboolean is_field)
4314 {
4315 locator_t loc;
4316 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_FIELDMARSHAL];
4317
4318 if (!tdef->base)
4319 return NULL;
4320
4321 loc.t = tdef;
4322 loc.col_idx = MONO_FIELD_MARSHAL_PARENT;
4323 loc.idx = ((idx + 1) << MONO_HAS_FIELD_MARSHAL_BITS) | (is_field? MONO_HAS_FIELD_MARSHAL_FIELDSREF: MONO_HAS_FIELD_MARSHAL_PARAMDEF);
4324
4325 /* FIXME: Index translation */
4326
4327 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4328 return NULL;
4329
4330 return mono_metadata_blob_heap (meta, mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_MARSHAL_NATIVE_TYPE));
4331 }
4332
4333 static MonoMethod*
4334 method_from_method_def_or_ref (MonoImage *m, guint32 tok, MonoGenericContext *context)
4335 {
4336 guint32 idx = tok >> MONO_METHODDEFORREF_BITS;
4337
4338 switch (tok & MONO_METHODDEFORREF_MASK) {
4339 case MONO_METHODDEFORREF_METHODDEF:
4340 return mono_get_method_full (m, MONO_TOKEN_METHOD_DEF | idx, NULL, context);
4341 case MONO_METHODDEFORREF_METHODREF:
4342 return mono_get_method_full (m, MONO_TOKEN_MEMBER_REF | idx, NULL, context);
4343 }
4344 g_assert_not_reached ();
4345 return NULL;
4346 }
4347
4348 /*
4349 * mono_class_get_overrides_full:
4350 *
4351 * Return the method overrides belonging to class @type_token in @overrides, and
4352 * the number of overrides in @num_overrides.
4353 *
4354 * Returns: TRUE on success, FALSE on failure.
4355 */
4356 gboolean
4357 mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod ***overrides, gint32 *num_overrides,
4358 MonoGenericContext *generic_context)
4359 {
4360 locator_t loc;
4361 MonoTableInfo *tdef = &image->tables [MONO_TABLE_METHODIMPL];
4362 guint32 start, end;
4363 gint32 i, num;
4364 guint32 cols [MONO_METHODIMPL_SIZE];
4365 MonoMethod **result;
4366 gint32 ok = TRUE;
4367
4368 *overrides = NULL;
4369 if (num_overrides)
4370 *num_overrides = 0;
4371
4372 if (!tdef->base)
4373 return TRUE;
4374
4375 loc.t = tdef;
4376 loc.col_idx = MONO_METHODIMPL_CLASS;
4377 loc.idx = mono_metadata_token_index (type_token);
4378
4379 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4380 return TRUE;
4381
4382 start = loc.result;
4383 end = start + 1;
4384 /*
4385 * We may end up in the middle of the rows...
4386 */
4387 while (start > 0) {
4388 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_METHODIMPL_CLASS))
4389 start--;
4390 else
4391 break;
4392 }
4393 while (end < tdef->rows) {
4394 if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
4395 end++;
4396 else
4397 break;
4398 }
4399 num = end - start;
4400 result = g_new (MonoMethod*, num * 2);
4401 for (i = 0; i < num; ++i) {
4402 MonoMethod *method;
4403
4404 mono_metadata_decode_row (tdef, start + i, cols, MONO_METHODIMPL_SIZE);
4405 method = method_from_method_def_or_ref (
4406 image, cols [MONO_METHODIMPL_DECLARATION], generic_context);
4407 if (method == NULL)
4408 ok = FALSE;
4409 result [i * 2] = method;
4410 method = method_from_method_def_or_ref (
4411 image, cols [MONO_METHODIMPL_BODY], generic_context);
4412 if (method == NULL)
4413 ok = FALSE;
4414 result [i * 2 + 1] = method;
4415 }
4416
4417 *overrides = result;
4418 if (num_overrides)
4419 *num_overrides = num;
4420 return ok;
4421 }
4422
4423 /**
4424 * mono_guid_to_string:
4425 *
4426 * Converts a 16 byte Microsoft GUID to the standard string representation.
4427 */
4428 char *
4429 mono_guid_to_string (const guint8 *guid)
4430 {
4431 return g_strdup_printf ("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
4432 guid[3], guid[2], guid[1], guid[0],
4433 guid[5], guid[4],
4434 guid[7], guid[6],
4435 guid[8], guid[9],
4436 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
4437 }
4438
4439 static gboolean
4440 get_constraints (MonoImage *image, int owner, MonoClass ***constraints, MonoGenericContainer *container)
4441 {
4442 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAMCONSTRAINT];
4443 guint32 cols [MONO_GENPARCONSTRAINT_SIZE];
4444 guint32 i, token, found;
4445 MonoClass *klass, **res;
4446 GList *cons = NULL, *tmp;
4447 MonoGenericContext *context = &container->context;
4448
4449 /* FIXME: !container->klass => this is probably monodis */
4450 g_assert (!container->klass || context->gclass || context->gmethod);
4451
4452 *constraints = NULL;
4453 found = 0;
4454 for (i = 0; i < tdef->rows; ++i) {
4455 mono_metadata_decode_row (tdef, i, cols, MONO_GENPARCONSTRAINT_SIZE);
4456 if (cols [MONO_GENPARCONSTRAINT_GENERICPAR] == owner) {
4457 token = mono_metadata_token_from_dor (cols [MONO_GENPARCONSTRAINT_CONSTRAINT]);
4458 klass = mono_class_get_full (image, token, context);
4459 cons = g_list_append (cons, klass);
4460 ++found;
4461 } else {
4462 /* contiguous list finished */
4463 if (found)
4464 break;
4465 }
4466 }
4467 if (!found)
4468 return TRUE;
4469 res = g_new0 (MonoClass*, found + 1);
4470 for (i = 0, tmp = cons; i < found; ++i, tmp = tmp->next) {
4471 res [i] = tmp->data;
4472 }
4473 g_list_free (cons);
4474 *constraints = res;
4475 return TRUE;
4476 }
4477
4478 /*
4479 * mono_metadata_get_generic_param_row:
4480 *
4481 * @image:
4482 * @token: TypeOrMethodDef token, owner for GenericParam
4483 * @owner: coded token, set on return
4484 *
4485 * Returns: 1-based row-id in the GenericParam table whose
4486 * owner is @token. 0 if not found.
4487 */
4488 guint32
4489 mono_metadata_get_generic_param_row (MonoImage *image, guint32 token, guint32 *owner)
4490 {
4491 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
4492 guint32 cols [MONO_GENERICPARAM_SIZE];
4493 guint32 i;
4494
4495 g_assert (owner);
4496 if (!tdef->base)
4497 return 0;
4498
4499 if (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
4500 *owner = MONO_TYPEORMETHOD_TYPE;
4501 else if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
4502 *owner = MONO_TYPEORMETHOD_METHOD;
4503 else {
4504 g_error ("wrong token %x to get_generic_param_row", token);
4505 return 0;
4506 }
4507 *owner |= mono_metadata_token_index (token) << MONO_TYPEORMETHOD_BITS;
4508
4509 for (i = 0; i < tdef->rows; ++i) {
4510 mono_metadata_decode_row (tdef, i, cols, MONO_GENERICPARAM_SIZE);
4511 if (cols [MONO_GENERICPARAM_OWNER] == *owner)
4512 return i + 1;
4513 }
4514
4515 return 0;
4516 }
4517
4518 gboolean
4519 mono_metadata_has_generic_params (MonoImage *image, guint32 token)
4520 {
4521 guint32 owner;
4522 return mono_metadata_get_generic_param_row (image, token, &owner);
4523 }
4524
4525 /*
4526 * mono_metadata_load_generic_param_constraints:
4527 *
4528 * Load the generic parameter constraints for the newly created generic type or method
4529 * represented by @token and @container. The @container is the new container which has
4530 * been returned by a call to mono_metadata_load_generic_params() with this @token.
4531 */
4532 void
4533 mono_metadata_load_generic_param_constraints (MonoImage *image, guint32 token,
4534 MonoGenericContainer *container)
4535 {
4536 guint32 start_row, i, owner;
4537 if (! (start_row = mono_metadata_get_generic_param_row (image, token, &owner)))
4538 return;
4539 for (i = 0; i < container->type_argc; i++)
4540 get_constraints (image, start_row + i, &container->type_params [i].constraints, container);
4541 }
4542
4543 /*
4544 * mono_metadata_load_generic_params:
4545 *
4546 * Load the type parameters from the type or method definition @token.
4547 *
4548 * Use this method after parsing a type or method definition to figure out whether it's a generic
4549 * type / method. When parsing a method definition, @parent_container points to the generic container
4550 * of the current class, if any.
4551 *
4552 * Note: This method does not load the constraints: for typedefs, this has to be done after fully
4553 * creating the type.
4554 *
4555 * Returns: NULL if @token is not a generic type or method definition or the new generic container.
4556 *
4557 */
4558 MonoGenericContainer *
4559 mono_metadata_load_generic_params (MonoImage *image, guint32 token, MonoGenericContainer *parent_container)
4560 {
4561 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
4562 guint32 cols [MONO_GENERICPARAM_SIZE];
4563 guint32 i, owner = 0, n;
4564 MonoGenericContainer *container;
4565 MonoGenericParam *params;
4566
4567 if (!(i = mono_metadata_get_generic_param_row (image, token, &owner)))
4568 return NULL;
4569 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
4570 params = NULL;
4571 n = 0;
4572 container = g_new0 (MonoGenericContainer, 1);
4573 do {
4574 n++;
4575 params = g_realloc (params, sizeof (MonoGenericParam) * n);
4576 params [n - 1].owner = container;
4577 params [n - 1].pklass = NULL;
4578 params [n - 1].method = NULL;
4579 params [n - 1].flags = cols [MONO_GENERICPARAM_FLAGS];
4580 params [n - 1].num = cols [MONO_GENERICPARAM_NUMBER];
4581 params [n - 1].name = mono_metadata_string_heap (image, cols [MONO_GENERICPARAM_NAME]);
4582 params [n - 1].constraints = NULL;
4583 if (++i > tdef->rows)
4584 break;
4585 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
4586 } while (cols [MONO_GENERICPARAM_OWNER] == owner);
4587
4588 container->type_argc = n;
4589 container->type_params = params;
4590 container->parent = parent_container;
4591
4592 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
4593 container->is_method = 1;
4594
4595 container->context.container = container;
4596
4597 return container;
4598 }
4599
4600 gboolean
4601 mono_type_is_byref (MonoType *type)
4602 {
4603 return type->byref;
4604 }
4605
4606 int
4607 mono_type_get_type (MonoType *type)
4608 {
4609 return type->type;
4610 }
4611
4612 /* For MONO_TYPE_FNPTR */
4613 MonoMethodSignature*
4614 mono_type_get_signature (MonoType *type)
4615 {
4616 return type->data.method;
4617 }
4618
4619 /* For MONO_TYPE_CLASS, VALUETYPE */
4620 MonoClass*
4621 mono_type_get_class (MonoType *type)
4622 {
4623 return type->data.klass;
4624 }
4625
4626 /* For MONO_TYPE_ARRAY */
4627 MonoArrayType*
4628 mono_type_get_array_type (MonoType *type)
4629 {
4630 return type->data.array;
4631 }
4632
4633 /* For MONO_TYPE_PTR */
4634 MonoType*
4635 mono_type_get_ptr_type (MonoType *type)
4636 {
4637 return type->data.type;
4638 }
4639
4640 MonoClass*
4641 mono_type_get_modifiers (MonoType *type, gboolean *is_required, gpointer *iter)
4642 {
4643 /* FIXME: implement */
4644 return NULL;
4645 }
4646
4647 MonoType*
4648 mono_signature_get_return_type (MonoMethodSignature *sig)
4649 {
4650 return sig->ret;
4651 }
4652
4653 MonoType*
4654 mono_signature_get_params (MonoMethodSignature *sig, gpointer *iter)
4655 {
4656 MonoType** type;
4657 if (!iter)
4658 return NULL;
4659 if (!*iter) {
4660 /* start from the first */
4661 if (sig->param_count) {
4662 *iter = &sig->params [0];
4663 return sig->params [0];
4664 } else {
4665 /* no method */
4666 return NULL;
4667 }
4668 }
4669 type = *iter;
4670 type++;
4671 if (type < &sig->params [sig->param_count]) {
4672 *iter = type;
4673 return *type;
4674 }
4675 return NULL;
4676 }
4677
4678 guint32
4679 mono_signature_get_param_count (MonoMethodSignature *sig)
4680 {
4681 return sig->param_count;
4682 }
4683
4684 guint32
4685 mono_signature_get_call_conv (MonoMethodSignature *sig)
4686 {
4687 return sig->call_convention;
4688 }
4689
4690 int
4691 mono_signature_vararg_start (MonoMethodSignature *sig)
4692 {
4693 return sig->sentinelpos;
4694 }
4695
4696 gboolean
4697 mono_signature_is_instance (MonoMethodSignature *sig)
4698 {
4699 return sig->hasthis;
4700 }
4701
4702 gboolean
4703 mono_signature_explicit_this (MonoMethodSignature *sig)
4704 {
4705 return sig->explicit_this;
4706 }
4707
4708 /* for use with allocated memory blocks (assumes alignment is to 8 bytes) */
4709 guint
4710 mono_aligned_addr_hash (gconstpointer ptr)
4711 {
4712 return GPOINTER_TO_UINT (ptr) >> 3;
4713 }
4714
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