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[reflection] Divide reflection.c into multiple files. NFC
[mono-project.git] / mono / metadata / metadata.c
blob169053473317eaa14429f11eca6f97143c264554
1 /*
2 * metadata.c: Routines for accessing the metadata
3 *
4 * Authors:
5 * Miguel de Icaza (miguel@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 *
8 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
9 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
10 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
11 */
12
13 #include <config.h>
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <glib.h>
18 #include "metadata.h"
19 #include "tabledefs.h"
20 #include "mono-endian.h"
21 #include "cil-coff.h"
22 #include "tokentype.h"
23 #include "class-internals.h"
24 #include "metadata-internals.h"
25 #include "verify-internals.h"
26 #include "class.h"
27 #include "marshal.h"
28 #include "debug-helpers.h"
29 #include "abi-details.h"
30 #include <mono/utils/mono-error-internals.h>
31 #include <mono/utils/bsearch.h>
32 #include <mono/utils/atomic.h>
33
34 /* Auxiliary structure used for caching inflated signatures */
35 typedef struct {
36 MonoMethodSignature *sig;
37 MonoGenericContext context;
38 } MonoInflatedMethodSignature;
39
40 static gboolean do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container, gboolean transient,
41 const char *ptr, const char **rptr, MonoError *error);
42
43 static gboolean do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only);
44 static gboolean mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only);
45 static gboolean mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only);
46 static gboolean _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2,
47 gboolean signature_only);
48 static void free_generic_inst (MonoGenericInst *ginst);
49 static void free_generic_class (MonoGenericClass *ginst);
50 static void free_inflated_method (MonoMethodInflated *method);
51 static void free_inflated_signature (MonoInflatedMethodSignature *sig);
52 static void mono_metadata_field_info_full (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva, MonoMarshalSpec **marshal_spec, gboolean alloc_from_image);
53
54 /*
55 * This enumeration is used to describe the data types in the metadata
56 * tables
57 */
58 enum {
59 MONO_MT_END,
60
61 /* Sized elements */
62 MONO_MT_UINT32,
63 MONO_MT_UINT16,
64 MONO_MT_UINT8,
65
66 /* Index into Blob heap */
67 MONO_MT_BLOB_IDX,
68
69 /* Index into String heap */
70 MONO_MT_STRING_IDX,
71
72 /* GUID index */
73 MONO_MT_GUID_IDX,
74
75 /* Pointer into a table */
76 MONO_MT_TABLE_IDX,
77
78 /* HasConstant:Parent pointer (Param, Field or Property) */
79 MONO_MT_CONST_IDX,
80
81 /* HasCustomAttribute index. Indexes any table except CustomAttribute */
82 MONO_MT_HASCAT_IDX,
83
84 /* CustomAttributeType encoded index */
85 MONO_MT_CAT_IDX,
86
87 /* HasDeclSecurity index: TypeDef Method or Assembly */
88 MONO_MT_HASDEC_IDX,
89
90 /* Implementation coded index: File, Export AssemblyRef */
91 MONO_MT_IMPL_IDX,
92
93 /* HasFieldMarshal coded index: Field or Param table */
94 MONO_MT_HFM_IDX,
95
96 /* MemberForwardedIndex: Field or Method */
97 MONO_MT_MF_IDX,
98
99 /* TypeDefOrRef coded index: typedef, typeref, typespec */
100 MONO_MT_TDOR_IDX,
101
102 /* MemberRefParent coded index: typeref, moduleref, method, memberref, typesepc, typedef */
103 MONO_MT_MRP_IDX,
104
105 /* MethodDefOrRef coded index: Method or Member Ref table */
106 MONO_MT_MDOR_IDX,
107
108 /* HasSemantic coded index: Event or Property */
109 MONO_MT_HS_IDX,
110
111 /* ResolutionScope coded index: Module, ModuleRef, AssemblytRef, TypeRef */
112 MONO_MT_RS_IDX
113 };
114
115 const static unsigned char TableSchemas [] = {
116 #define ASSEMBLY_SCHEMA_OFFSET 0
117 MONO_MT_UINT32, /* "HashId" }, */
118 MONO_MT_UINT16, /* "Major" }, */
119 MONO_MT_UINT16, /* "Minor" }, */
120 MONO_MT_UINT16, /* "BuildNumber" }, */
121 MONO_MT_UINT16, /* "RevisionNumber" }, */
122 MONO_MT_UINT32, /* "Flags" }, */
123 MONO_MT_BLOB_IDX, /* "PublicKey" }, */
124 MONO_MT_STRING_IDX, /* "Name" }, */
125 MONO_MT_STRING_IDX, /* "Culture" }, */
126 MONO_MT_END,
127
128 #define ASSEMBLYOS_SCHEMA_OFFSET ASSEMBLY_SCHEMA_OFFSET + 10
129 MONO_MT_UINT32, /* "OSPlatformID" }, */
130 MONO_MT_UINT32, /* "OSMajor" }, */
131 MONO_MT_UINT32, /* "OSMinor" }, */
132 MONO_MT_END,
133
134 #define ASSEMBLYPROC_SCHEMA_OFFSET ASSEMBLYOS_SCHEMA_OFFSET + 4
135 MONO_MT_UINT32, /* "Processor" }, */
136 MONO_MT_END,
137
138 #define ASSEMBLYREF_SCHEMA_OFFSET ASSEMBLYPROC_SCHEMA_OFFSET + 2
139 MONO_MT_UINT16, /* "Major" }, */
140 MONO_MT_UINT16, /* "Minor" }, */
141 MONO_MT_UINT16, /* "Build" }, */
142 MONO_MT_UINT16, /* "Revision" }, */
143 MONO_MT_UINT32, /* "Flags" }, */
144 MONO_MT_BLOB_IDX, /* "PublicKeyOrToken" }, */
145 MONO_MT_STRING_IDX, /* "Name" }, */
146 MONO_MT_STRING_IDX, /* "Culture" }, */
147 MONO_MT_BLOB_IDX, /* "HashValue" }, */
148 MONO_MT_END,
149
150 #define ASSEMBLYREFOS_SCHEMA_OFFSET ASSEMBLYREF_SCHEMA_OFFSET + 10
151 MONO_MT_UINT32, /* "OSPlatformID" }, */
152 MONO_MT_UINT32, /* "OSMajorVersion" }, */
153 MONO_MT_UINT32, /* "OSMinorVersion" }, */
154 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
155 MONO_MT_END,
156
157 #define ASSEMBLYREFPROC_SCHEMA_OFFSET ASSEMBLYREFOS_SCHEMA_OFFSET + 5
158 MONO_MT_UINT32, /* "Processor" }, */
159 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
160 MONO_MT_END,
161
162 #define CLASS_LAYOUT_SCHEMA_OFFSET ASSEMBLYREFPROC_SCHEMA_OFFSET + 3
163 MONO_MT_UINT16, /* "PackingSize" }, */
164 MONO_MT_UINT32, /* "ClassSize" }, */
165 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
166 MONO_MT_END,
167
168 #define CONSTANT_SCHEMA_OFFSET CLASS_LAYOUT_SCHEMA_OFFSET + 4
169 MONO_MT_UINT8, /* "Type" }, */
170 MONO_MT_UINT8, /* "PaddingZero" }, */
171 MONO_MT_CONST_IDX, /* "Parent" }, */
172 MONO_MT_BLOB_IDX, /* "Value" }, */
173 MONO_MT_END,
174
175 #define CUSTOM_ATTR_SCHEMA_OFFSET CONSTANT_SCHEMA_OFFSET + 5
176 MONO_MT_HASCAT_IDX, /* "Parent" }, */
177 MONO_MT_CAT_IDX, /* "Type" }, */
178 MONO_MT_BLOB_IDX, /* "Value" }, */
179 MONO_MT_END,
180
181 #define DECL_SEC_SCHEMA_OFFSET CUSTOM_ATTR_SCHEMA_OFFSET + 4
182 MONO_MT_UINT16, /* "Action" }, */
183 MONO_MT_HASDEC_IDX, /* "Parent" }, */
184 MONO_MT_BLOB_IDX, /* "PermissionSet" }, */
185 MONO_MT_END,
186
187 #define EVENTMAP_SCHEMA_OFFSET DECL_SEC_SCHEMA_OFFSET + 4
188 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
189 MONO_MT_TABLE_IDX, /* "EventList:Event" }, */
190 MONO_MT_END,
191
192 #define EVENT_SCHEMA_OFFSET EVENTMAP_SCHEMA_OFFSET + 3
193 MONO_MT_UINT16, /* "EventFlags#EventAttribute" }, */
194 MONO_MT_STRING_IDX, /* "Name" }, */
195 MONO_MT_TDOR_IDX, /* "EventType" }, TypeDef or TypeRef or TypeSpec */
196 MONO_MT_END,
197
198 #define EVENT_POINTER_SCHEMA_OFFSET EVENT_SCHEMA_OFFSET + 4
199 MONO_MT_TABLE_IDX, /* "Event" }, */
200 MONO_MT_END,
201
202 #define EXPORTED_TYPE_SCHEMA_OFFSET EVENT_POINTER_SCHEMA_OFFSET + 2
203 MONO_MT_UINT32, /* "Flags" }, */
204 MONO_MT_TABLE_IDX, /* "TypeDefId" }, */
205 MONO_MT_STRING_IDX, /* "TypeName" }, */
206 MONO_MT_STRING_IDX, /* "TypeNameSpace" }, */
207 MONO_MT_IMPL_IDX, /* "Implementation" }, */
208 MONO_MT_END,
209
210 #define FIELD_SCHEMA_OFFSET EXPORTED_TYPE_SCHEMA_OFFSET + 6
211 MONO_MT_UINT16, /* "Flags" }, */
212 MONO_MT_STRING_IDX, /* "Name" }, */
213 MONO_MT_BLOB_IDX, /* "Signature" }, */
214 MONO_MT_END,
215
216 #define FIELD_LAYOUT_SCHEMA_OFFSET FIELD_SCHEMA_OFFSET + 4
217 MONO_MT_UINT32, /* "Offset" }, */
218 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
219 MONO_MT_END,
220
221 #define FIELD_MARSHAL_SCHEMA_OFFSET FIELD_LAYOUT_SCHEMA_OFFSET + 3
222 MONO_MT_HFM_IDX, /* "Parent" }, */
223 MONO_MT_BLOB_IDX, /* "NativeType" }, */
224 MONO_MT_END,
225
226 #define FIELD_RVA_SCHEMA_OFFSET FIELD_MARSHAL_SCHEMA_OFFSET + 3
227 MONO_MT_UINT32, /* "RVA" }, */
228 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
229 MONO_MT_END,
230
231 #define FIELD_POINTER_SCHEMA_OFFSET FIELD_RVA_SCHEMA_OFFSET + 3
232 MONO_MT_TABLE_IDX, /* "Field" }, */
233 MONO_MT_END,
234
235 #define FILE_SCHEMA_OFFSET FIELD_POINTER_SCHEMA_OFFSET + 2
236 MONO_MT_UINT32, /* "Flags" }, */
237 MONO_MT_STRING_IDX, /* "Name" }, */
238 MONO_MT_BLOB_IDX, /* "Value" }, */
239 MONO_MT_END,
240
241 #define IMPLMAP_SCHEMA_OFFSET FILE_SCHEMA_OFFSET + 4
242 MONO_MT_UINT16, /* "MappingFlag" }, */
243 MONO_MT_MF_IDX, /* "MemberForwarded" }, */
244 MONO_MT_STRING_IDX, /* "ImportName" }, */
245 MONO_MT_TABLE_IDX, /* "ImportScope:ModuleRef" }, */
246 MONO_MT_END,
247
248 #define IFACEMAP_SCHEMA_OFFSET IMPLMAP_SCHEMA_OFFSET + 5
249 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
250 MONO_MT_TDOR_IDX, /* "Interface=TypeDefOrRef" }, */
251 MONO_MT_END,
252
253 #define MANIFEST_SCHEMA_OFFSET IFACEMAP_SCHEMA_OFFSET + 3
254 MONO_MT_UINT32, /* "Offset" }, */
255 MONO_MT_UINT32, /* "Flags" }, */
256 MONO_MT_STRING_IDX, /* "Name" }, */
257 MONO_MT_IMPL_IDX, /* "Implementation" }, */
258 MONO_MT_END,
259
260 #define MEMBERREF_SCHEMA_OFFSET MANIFEST_SCHEMA_OFFSET + 5
261 MONO_MT_MRP_IDX, /* "Class" }, */
262 MONO_MT_STRING_IDX, /* "Name" }, */
263 MONO_MT_BLOB_IDX, /* "Signature" }, */
264 MONO_MT_END,
265
266 #define METHOD_SCHEMA_OFFSET MEMBERREF_SCHEMA_OFFSET + 4
267 MONO_MT_UINT32, /* "RVA" }, */
268 MONO_MT_UINT16, /* "ImplFlags#MethodImplAttributes" }, */
269 MONO_MT_UINT16, /* "Flags#MethodAttribute" }, */
270 MONO_MT_STRING_IDX, /* "Name" }, */
271 MONO_MT_BLOB_IDX, /* "Signature" }, */
272 MONO_MT_TABLE_IDX, /* "ParamList:Param" }, */
273 MONO_MT_END,
274
275 #define METHOD_IMPL_SCHEMA_OFFSET METHOD_SCHEMA_OFFSET + 7
276 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
277 MONO_MT_MDOR_IDX, /* "MethodBody" }, */
278 MONO_MT_MDOR_IDX, /* "MethodDeclaration" }, */
279 MONO_MT_END,
280
281 #define METHOD_SEMA_SCHEMA_OFFSET METHOD_IMPL_SCHEMA_OFFSET + 4
282 MONO_MT_UINT16, /* "MethodSemantic" }, */
283 MONO_MT_TABLE_IDX, /* "Method:Method" }, */
284 MONO_MT_HS_IDX, /* "Association" }, */
285 MONO_MT_END,
286
287 #define METHOD_POINTER_SCHEMA_OFFSET METHOD_SEMA_SCHEMA_OFFSET + 4
288 MONO_MT_TABLE_IDX, /* "Method" }, */
289 MONO_MT_END,
290
291 #define MODULE_SCHEMA_OFFSET METHOD_POINTER_SCHEMA_OFFSET + 2
292 MONO_MT_UINT16, /* "Generation" }, */
293 MONO_MT_STRING_IDX, /* "Name" }, */
294 MONO_MT_GUID_IDX, /* "MVID" }, */
295 MONO_MT_GUID_IDX, /* "EncID" }, */
296 MONO_MT_GUID_IDX, /* "EncBaseID" }, */
297 MONO_MT_END,
298
299 #define MODULEREF_SCHEMA_OFFSET MODULE_SCHEMA_OFFSET + 6
300 MONO_MT_STRING_IDX, /* "Name" }, */
301 MONO_MT_END,
302
303 #define NESTED_CLASS_SCHEMA_OFFSET MODULEREF_SCHEMA_OFFSET + 2
304 MONO_MT_TABLE_IDX, /* "NestedClass:TypeDef" }, */
305 MONO_MT_TABLE_IDX, /* "EnclosingClass:TypeDef" }, */
306 MONO_MT_END,
307
308 #define PARAM_SCHEMA_OFFSET NESTED_CLASS_SCHEMA_OFFSET + 3
309 MONO_MT_UINT16, /* "Flags" }, */
310 MONO_MT_UINT16, /* "Sequence" }, */
311 MONO_MT_STRING_IDX, /* "Name" }, */
312 MONO_MT_END,
313
314 #define PARAM_POINTER_SCHEMA_OFFSET PARAM_SCHEMA_OFFSET + 4
315 MONO_MT_TABLE_IDX, /* "Param" }, */
316 MONO_MT_END,
317
318 #define PROPERTY_SCHEMA_OFFSET PARAM_POINTER_SCHEMA_OFFSET + 2
319 MONO_MT_UINT16, /* "Flags" }, */
320 MONO_MT_STRING_IDX, /* "Name" }, */
321 MONO_MT_BLOB_IDX, /* "Type" }, */
322 MONO_MT_END,
323
324 #define PROPERTY_POINTER_SCHEMA_OFFSET PROPERTY_SCHEMA_OFFSET + 4
325 MONO_MT_TABLE_IDX, /* "Property" }, */
326 MONO_MT_END,
327
328 #define PROPERTY_MAP_SCHEMA_OFFSET PROPERTY_POINTER_SCHEMA_OFFSET + 2
329 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
330 MONO_MT_TABLE_IDX, /* "PropertyList:Property" }, */
331 MONO_MT_END,
332
333 #define STDALON_SIG_SCHEMA_OFFSET PROPERTY_MAP_SCHEMA_OFFSET + 3
334 MONO_MT_BLOB_IDX, /* "Signature" }, */
335 MONO_MT_END,
336
337 #define TYPEDEF_SCHEMA_OFFSET STDALON_SIG_SCHEMA_OFFSET + 2
338 MONO_MT_UINT32, /* "Flags" }, */
339 MONO_MT_STRING_IDX, /* "Name" }, */
340 MONO_MT_STRING_IDX, /* "Namespace" }, */
341 MONO_MT_TDOR_IDX, /* "Extends" }, */
342 MONO_MT_TABLE_IDX, /* "FieldList:Field" }, */
343 MONO_MT_TABLE_IDX, /* "MethodList:Method" }, */
344 MONO_MT_END,
345
346 #define TYPEREF_SCHEMA_OFFSET TYPEDEF_SCHEMA_OFFSET + 7
347 MONO_MT_RS_IDX, /* "ResolutionScope=ResolutionScope" }, */
348 MONO_MT_STRING_IDX, /* "Name" }, */
349 MONO_MT_STRING_IDX, /* "Namespace" }, */
350 MONO_MT_END,
351
352 #define TYPESPEC_SCHEMA_OFFSET TYPEREF_SCHEMA_OFFSET + 4
353 MONO_MT_BLOB_IDX, /* "Signature" }, */
354 MONO_MT_END,
355
356 #define GENPARAM_SCHEMA_OFFSET TYPESPEC_SCHEMA_OFFSET + 2
357 MONO_MT_UINT16, /* "Number" }, */
358 MONO_MT_UINT16, /* "Flags" }, */
359 MONO_MT_TABLE_IDX, /* "Owner" }, TypeDef or MethodDef */
360 MONO_MT_STRING_IDX, /* "Name" }, */
361 MONO_MT_END,
362
363 #define METHOD_SPEC_SCHEMA_OFFSET GENPARAM_SCHEMA_OFFSET + 5
364 MONO_MT_MDOR_IDX, /* "Method" }, */
365 MONO_MT_BLOB_IDX, /* "Signature" }, */
366 MONO_MT_END,
367
368 #define GEN_CONSTRAINT_SCHEMA_OFFSET METHOD_SPEC_SCHEMA_OFFSET + 3
369 MONO_MT_TABLE_IDX, /* "GenericParam" }, */
370 MONO_MT_TDOR_IDX, /* "Constraint" }, */
371 MONO_MT_END,
372
373 #define DOCUMENT_SCHEMA_OFFSET GEN_CONSTRAINT_SCHEMA_OFFSET + 3
374 MONO_MT_BLOB_IDX, /* Name */
375 MONO_MT_GUID_IDX, /* HashAlgorithm */
376 MONO_MT_BLOB_IDX, /* Hash */
377 MONO_MT_GUID_IDX, /* Language */
378 MONO_MT_END,
379
380 #define METHODBODY_SCHEMA_OFFSET DOCUMENT_SCHEMA_OFFSET + 5
381 MONO_MT_TABLE_IDX, /* Document */
382 MONO_MT_BLOB_IDX, /* SequencePoints */
383 MONO_MT_END,
384
385 #define LOCALSCOPE_SCHEMA_OFFSET METHODBODY_SCHEMA_OFFSET + 3
386 MONO_MT_TABLE_IDX, /* Method */
387 MONO_MT_TABLE_IDX, /* ImportScope */
388 MONO_MT_TABLE_IDX, /* VariableList */
389 MONO_MT_TABLE_IDX, /* ConstantList */
390 MONO_MT_UINT32, /* StartOffset */
391 MONO_MT_UINT32, /* Length */
392 MONO_MT_END,
393
394 #define LOCALVARIABLE_SCHEMA_OFFSET LOCALSCOPE_SCHEMA_OFFSET + 7
395 MONO_MT_UINT16, /* Attributes */
396 MONO_MT_UINT16, /* Index */
397 MONO_MT_STRING_IDX, /* Name */
398 MONO_MT_END,
399
400 #define NULL_SCHEMA_OFFSET LOCALVARIABLE_SCHEMA_OFFSET + 4
401 MONO_MT_END
402 };
403
404 /* Must be the same order as MONO_TABLE_* */
405 const static unsigned char
406 table_description [] = {
407 MODULE_SCHEMA_OFFSET,
408 TYPEREF_SCHEMA_OFFSET,
409 TYPEDEF_SCHEMA_OFFSET,
410 FIELD_POINTER_SCHEMA_OFFSET,
411 FIELD_SCHEMA_OFFSET,
412 METHOD_POINTER_SCHEMA_OFFSET,
413 METHOD_SCHEMA_OFFSET,
414 PARAM_POINTER_SCHEMA_OFFSET,
415 PARAM_SCHEMA_OFFSET,
416 IFACEMAP_SCHEMA_OFFSET,
417 MEMBERREF_SCHEMA_OFFSET, /* 0xa */
418 CONSTANT_SCHEMA_OFFSET,
419 CUSTOM_ATTR_SCHEMA_OFFSET,
420 FIELD_MARSHAL_SCHEMA_OFFSET,
421 DECL_SEC_SCHEMA_OFFSET,
422 CLASS_LAYOUT_SCHEMA_OFFSET,
423 FIELD_LAYOUT_SCHEMA_OFFSET, /* 0x10 */
424 STDALON_SIG_SCHEMA_OFFSET,
425 EVENTMAP_SCHEMA_OFFSET,
426 EVENT_POINTER_SCHEMA_OFFSET,
427 EVENT_SCHEMA_OFFSET,
428 PROPERTY_MAP_SCHEMA_OFFSET,
429 PROPERTY_POINTER_SCHEMA_OFFSET,
430 PROPERTY_SCHEMA_OFFSET,
431 METHOD_SEMA_SCHEMA_OFFSET,
432 METHOD_IMPL_SCHEMA_OFFSET,
433 MODULEREF_SCHEMA_OFFSET, /* 0x1a */
434 TYPESPEC_SCHEMA_OFFSET,
435 IMPLMAP_SCHEMA_OFFSET,
436 FIELD_RVA_SCHEMA_OFFSET,
437 NULL_SCHEMA_OFFSET,
438 NULL_SCHEMA_OFFSET,
439 ASSEMBLY_SCHEMA_OFFSET, /* 0x20 */
440 ASSEMBLYPROC_SCHEMA_OFFSET,
441 ASSEMBLYOS_SCHEMA_OFFSET,
442 ASSEMBLYREF_SCHEMA_OFFSET,
443 ASSEMBLYREFPROC_SCHEMA_OFFSET,
444 ASSEMBLYREFOS_SCHEMA_OFFSET,
445 FILE_SCHEMA_OFFSET,
446 EXPORTED_TYPE_SCHEMA_OFFSET,
447 MANIFEST_SCHEMA_OFFSET,
448 NESTED_CLASS_SCHEMA_OFFSET,
449 GENPARAM_SCHEMA_OFFSET, /* 0x2a */
450 METHOD_SPEC_SCHEMA_OFFSET,
451 GEN_CONSTRAINT_SCHEMA_OFFSET,
452 NULL_SCHEMA_OFFSET,
453 NULL_SCHEMA_OFFSET,
454 NULL_SCHEMA_OFFSET,
455 DOCUMENT_SCHEMA_OFFSET, /* 0x30 */
456 METHODBODY_SCHEMA_OFFSET,
457 LOCALSCOPE_SCHEMA_OFFSET,
458 LOCALVARIABLE_SCHEMA_OFFSET
459 };
460
461 #ifdef HAVE_ARRAY_ELEM_INIT
462 #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
463 #define MSGSTRFIELD1(line) str##line
464 static const struct msgstr_t {
465 #define TABLEDEF(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
466 #include "mono/cil/tables.def"
467 #undef TABLEDEF
468 } tablestr = {
469 #define TABLEDEF(a,b) b,
470 #include "mono/cil/tables.def"
471 #undef TABLEDEF
472 };
473 static const gint16 tableidx [] = {
474 #define TABLEDEF(a,b) [a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
475 #include "mono/cil/tables.def"
476 #undef TABLEDEF
477 };
478
479 #else
480 #define TABLEDEF(a,b) b,
481 static const char* const
482 mono_tables_names [] = {
483 #include "mono/cil/tables.def"
484 NULL
485 };
486
487 #endif
488
489 // Amount initially reserved in each imageset's mempool.
490 // FIXME: This number is arbitrary, a more practical number should be found
491 #define INITIAL_IMAGE_SET_SIZE 1024
492
493 /**
494 * mono_meta_table_name:
495 * @table: table index
496 *
497 * Returns the name of the given ECMA metadata logical format table
498 * as described in ECMA 335, Partition II, Section 22.
499 *
500 * Returns: the name for the @table index
501 */
502 const char *
503 mono_meta_table_name (int table)
504 {
505 if ((table < 0) || (table > MONO_TABLE_LAST))
506 return "";
507
508 #ifdef HAVE_ARRAY_ELEM_INIT
509 return (const char*)&tablestr + tableidx [table];
510 #else
511 return mono_tables_names [table];
512 #endif
513 }
514
515 /* The guy who wrote the spec for this should not be allowed near a
516 * computer again.
517
518 If e is a coded token(see clause 23.1.7) that points into table ti out of n possible tables t0, .. tn-1,
519 then it is stored as e << (log n) & tag{ t0, .. tn-1}[ ti] using 2 bytes if the maximum number of
520 rows of tables t0, ..tn-1, is less than 2^16 - (log n), and using 4 bytes otherwise. The family of
521 finite maps tag{ t0, ..tn-1} is defined below. Note that to decode a physical row, you need the
522 inverse of this mapping.
523
524 */
525 #define rtsize(meta,s,b) (((s) < (1 << (b)) ? 2 : 4))
526 #define idx_size(meta,tableidx) ((meta)->tables [(tableidx)].rows < 65536 ? 2 : 4)
527
528 /* Reference: Partition II - 23.2.6 */
529 /*
530 * mono_metadata_compute_size:
531 * @meta: metadata context
532 * @tableindex: metadata table number
533 * @result_bitfield: pointer to guint32 where to store additional info
534 *
535 * mono_metadata_compute_size() computes the lenght in bytes of a single
536 * row in a metadata table. The size of each column is encoded in the
537 * @result_bitfield return value along with the number of columns in the table.
538 * the resulting bitfield should be handed to the mono_metadata_table_size()
539 * and mono_metadata_table_count() macros.
540 * This is a Mono runtime internal only function.
541 */
542 int
543 mono_metadata_compute_size (MonoImage *meta, int tableindex, guint32 *result_bitfield)
544 {
545 guint32 bitfield = 0;
546 int size = 0, field_size = 0;
547 int i, n, code;
548 int shift = 0;
549 const unsigned char *description = TableSchemas + table_description [tableindex];
550
551 for (i = 0; (code = description [i]) != MONO_MT_END; i++){
552 switch (code){
553 case MONO_MT_UINT32:
554 field_size = 4; break;
555
556 case MONO_MT_UINT16:
557 field_size = 2; break;
558
559 case MONO_MT_UINT8:
560 field_size = 1; break;
561
562 case MONO_MT_BLOB_IDX:
563 field_size = meta->idx_blob_wide ? 4 : 2; break;
564
565 case MONO_MT_STRING_IDX:
566 field_size = meta->idx_string_wide ? 4 : 2; break;
567
568 case MONO_MT_GUID_IDX:
569 field_size = meta->idx_guid_wide ? 4 : 2; break;
570
571 case MONO_MT_TABLE_IDX:
572 /* Uhm, a table index can point to other tables besides the current one
573 * so, it's not correct to use the rowcount of the current table to
574 * get the size for this column - lupus
575 */
576 switch (tableindex) {
577 case MONO_TABLE_ASSEMBLYREFOS:
578 g_assert (i == 3);
579 field_size = idx_size (meta, MONO_TABLE_ASSEMBLYREF); break;
580 case MONO_TABLE_ASSEMBLYREFPROCESSOR:
581 g_assert (i == 1);
582 field_size = idx_size (meta, MONO_TABLE_ASSEMBLYREF); break;
583 case MONO_TABLE_CLASSLAYOUT:
584 g_assert (i == 2);
585 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
586 case MONO_TABLE_EVENTMAP:
587 g_assert (i == 0 || i == 1);
588 field_size = i ? idx_size (meta, MONO_TABLE_EVENT):
589 idx_size (meta, MONO_TABLE_TYPEDEF);
590 break;
591 case MONO_TABLE_EVENT_POINTER:
592 g_assert (i == 0);
593 field_size = idx_size (meta, MONO_TABLE_EVENT); break;
594 case MONO_TABLE_EXPORTEDTYPE:
595 g_assert (i == 1);
596 /* the index is in another metadata file, so it must be 4 */
597 field_size = 4; break;
598 case MONO_TABLE_FIELDLAYOUT:
599 g_assert (i == 1);
600 field_size = idx_size (meta, MONO_TABLE_FIELD); break;
601 case MONO_TABLE_FIELDRVA:
602 g_assert (i == 1);
603 field_size = idx_size (meta, MONO_TABLE_FIELD); break;
604 case MONO_TABLE_FIELD_POINTER:
605 g_assert (i == 0);
606 field_size = idx_size (meta, MONO_TABLE_FIELD); break;
607 case MONO_TABLE_IMPLMAP:
608 g_assert (i == 3);
609 field_size = idx_size (meta, MONO_TABLE_MODULEREF); break;
610 case MONO_TABLE_INTERFACEIMPL:
611 g_assert (i == 0);
612 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
613 case MONO_TABLE_METHOD:
614 g_assert (i == 5);
615 field_size = idx_size (meta, MONO_TABLE_PARAM); break;
616 case MONO_TABLE_METHODIMPL:
617 g_assert (i == 0);
618 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
619 case MONO_TABLE_METHODSEMANTICS:
620 g_assert (i == 1);
621 field_size = idx_size (meta, MONO_TABLE_METHOD); break;
622 case MONO_TABLE_METHOD_POINTER:
623 g_assert (i == 0);
624 field_size = idx_size (meta, MONO_TABLE_METHOD); break;
625 case MONO_TABLE_NESTEDCLASS:
626 g_assert (i == 0 || i == 1);
627 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
628 case MONO_TABLE_PARAM_POINTER:
629 g_assert (i == 0);
630 field_size = idx_size (meta, MONO_TABLE_PARAM); break;
631 case MONO_TABLE_PROPERTYMAP:
632 g_assert (i == 0 || i == 1);
633 field_size = i ? idx_size (meta, MONO_TABLE_PROPERTY):
634 idx_size (meta, MONO_TABLE_TYPEDEF);
635 break;
636 case MONO_TABLE_PROPERTY_POINTER:
637 g_assert (i == 0);
638 field_size = idx_size (meta, MONO_TABLE_PROPERTY); break;
639 case MONO_TABLE_TYPEDEF:
640 g_assert (i == 4 || i == 5);
641 field_size = i == 4 ? idx_size (meta, MONO_TABLE_FIELD):
642 idx_size (meta, MONO_TABLE_METHOD);
643 break;
644 case MONO_TABLE_GENERICPARAM:
645 g_assert (i == 2);
646 n = MAX (meta->tables [MONO_TABLE_METHOD].rows, meta->tables [MONO_TABLE_TYPEDEF].rows);
647 /*This is a coded token for 2 tables, so takes 1 bit */
648 field_size = rtsize (meta, n, 16 - MONO_TYPEORMETHOD_BITS);
649 break;
650 case MONO_TABLE_GENERICPARAMCONSTRAINT:
651 g_assert (i == 0);
652 field_size = idx_size (meta, MONO_TABLE_GENERICPARAM);
653 break;
654 case MONO_TABLE_LOCALSCOPE:
655 switch (i) {
656 case 0:
657 // FIXME: This table is in another file
658 field_size = idx_size (meta, MONO_TABLE_METHOD);
659 break;
660 case 1:
661 field_size = idx_size (meta, MONO_TABLE_IMPORTSCOPE);
662 break;
663 case 2:
664 field_size = idx_size (meta, MONO_TABLE_LOCALVARIABLE);
665 break;
666 case 3:
667 field_size = idx_size (meta, MONO_TABLE_LOCALCONSTANT);
668 break;
669 default:
670 g_assert_not_reached ();
671 break;
672 }
673 break;
674 case MONO_TABLE_METHODBODY:
675 g_assert (i == 0);
676 field_size = idx_size (meta, MONO_TABLE_DOCUMENT);
677 break;
678 default:
679 g_error ("Can't handle MONO_MT_TABLE_IDX for table %d element %d", tableindex, i);
680 }
681 break;
682
683 /*
684 * HasConstant: ParamDef, FieldDef, Property
685 */
686 case MONO_MT_CONST_IDX:
687 n = MAX (meta->tables [MONO_TABLE_PARAM].rows,
688 meta->tables [MONO_TABLE_FIELD].rows);
689 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
690
691 /* 2 bits to encode tag */
692 field_size = rtsize (meta, n, 16-2);
693 break;
694
695 /*
696 * HasCustomAttribute: points to any table but
697 * itself.
698 */
699 case MONO_MT_HASCAT_IDX:
700 /*
701 * We believe that since the signature and
702 * permission are indexing the Blob heap,
703 * we should consider the blob size first
704 */
705 /* I'm not a believer - lupus
706 if (meta->idx_blob_wide){
707 field_size = 4;
708 break;
709 }*/
710
711 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
712 meta->tables [MONO_TABLE_FIELD].rows);
713 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
714 n = MAX (n, meta->tables [MONO_TABLE_TYPEDEF].rows);
715 n = MAX (n, meta->tables [MONO_TABLE_PARAM].rows);
716 n = MAX (n, meta->tables [MONO_TABLE_INTERFACEIMPL].rows);
717 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
718 n = MAX (n, meta->tables [MONO_TABLE_MODULE].rows);
719 n = MAX (n, meta->tables [MONO_TABLE_DECLSECURITY].rows);
720 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
721 n = MAX (n, meta->tables [MONO_TABLE_EVENT].rows);
722 n = MAX (n, meta->tables [MONO_TABLE_STANDALONESIG].rows);
723 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
724 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
725 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
726 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
727 n = MAX (n, meta->tables [MONO_TABLE_FILE].rows);
728 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
729 n = MAX (n, meta->tables [MONO_TABLE_MANIFESTRESOURCE].rows);
730
731 /* 5 bits to encode */
732 field_size = rtsize (meta, n, 16-5);
733 break;
734
735 /*
736 * CustomAttributeType: TypeDef, TypeRef, MethodDef,
737 * MemberRef and String.
738 */
739 case MONO_MT_CAT_IDX:
740 /* String is a heap, if it is wide, we know the size */
741 /* See above, nope.
742 if (meta->idx_string_wide){
743 field_size = 4;
744 break;
745 }*/
746
747 n = MAX (meta->tables [MONO_TABLE_TYPEREF].rows,
748 meta->tables [MONO_TABLE_TYPEDEF].rows);
749 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
750 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
751
752 /* 3 bits to encode */
753 field_size = rtsize (meta, n, 16-3);
754 break;
755
756 /*
757 * HasDeclSecurity: Typedef, MethodDef, Assembly
758 */
759 case MONO_MT_HASDEC_IDX:
760 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
761 meta->tables [MONO_TABLE_METHOD].rows);
762 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
763
764 /* 2 bits to encode */
765 field_size = rtsize (meta, n, 16-2);
766 break;
767
768 /*
769 * Implementation: File, AssemblyRef, ExportedType
770 */
771 case MONO_MT_IMPL_IDX:
772 n = MAX (meta->tables [MONO_TABLE_FILE].rows,
773 meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
774 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
775
776 /* 2 bits to encode tag */
777 field_size = rtsize (meta, n, 16-2);
778 break;
779
780 /*
781 * HasFieldMarshall: FieldDef, ParamDef
782 */
783 case MONO_MT_HFM_IDX:
784 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
785 meta->tables [MONO_TABLE_PARAM].rows);
786
787 /* 1 bit used to encode tag */
788 field_size = rtsize (meta, n, 16-1);
789 break;
790
791 /*
792 * MemberForwarded: FieldDef, MethodDef
793 */
794 case MONO_MT_MF_IDX:
795 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
796 meta->tables [MONO_TABLE_METHOD].rows);
797
798 /* 1 bit used to encode tag */
799 field_size = rtsize (meta, n, 16-1);
800 break;
801
802 /*
803 * TypeDefOrRef: TypeDef, ParamDef, TypeSpec
804 * LAMESPEC
805 * It is TypeDef, _TypeRef_, TypeSpec, instead.
806 */
807 case MONO_MT_TDOR_IDX:
808 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
809 meta->tables [MONO_TABLE_TYPEREF].rows);
810 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
811
812 /* 2 bits to encode */
813 field_size = rtsize (meta, n, 16-2);
814 break;
815
816 /*
817 * MemberRefParent: TypeDef, TypeRef, MethodDef, ModuleRef, TypeSpec, MemberRef
818 */
819 case MONO_MT_MRP_IDX:
820 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
821 meta->tables [MONO_TABLE_TYPEREF].rows);
822 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
823 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
824 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
825
826 /* 3 bits to encode */
827 field_size = rtsize (meta, n, 16 - 3);
828 break;
829
830 /*
831 * MethodDefOrRef: MethodDef, MemberRef
832 */
833 case MONO_MT_MDOR_IDX:
834 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
835 meta->tables [MONO_TABLE_MEMBERREF].rows);
836
837 /* 1 bit used to encode tag */
838 field_size = rtsize (meta, n, 16-1);
839 break;
840
841 /*
842 * HasSemantics: Property, Event
843 */
844 case MONO_MT_HS_IDX:
845 n = MAX (meta->tables [MONO_TABLE_PROPERTY].rows,
846 meta->tables [MONO_TABLE_EVENT].rows);
847
848 /* 1 bit used to encode tag */
849 field_size = rtsize (meta, n, 16-1);
850 break;
851
852 /*
853 * ResolutionScope: Module, ModuleRef, AssemblyRef, TypeRef
854 */
855 case MONO_MT_RS_IDX:
856 n = MAX (meta->tables [MONO_TABLE_MODULE].rows,
857 meta->tables [MONO_TABLE_MODULEREF].rows);
858 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
859 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
860
861 /* 2 bits used to encode tag (ECMA spec claims 3) */
862 field_size = rtsize (meta, n, 16 - 2);
863 break;
864 }
865
866 /*
867 * encode field size as follows (we just need to
868 * distinguish them).
869 *
870 * 4 -> 3
871 * 2 -> 1
872 * 1 -> 0
873 */
874 bitfield |= (field_size-1) << shift;
875 shift += 2;
876 size += field_size;
877 /*g_print ("table %02x field %d size %d\n", tableindex, i, field_size);*/
878 }
879
880 *result_bitfield = (i << 24) | bitfield;
881 return size;
882 }
883
884 /**
885 * mono_metadata_compute_table_bases:
886 * @meta: metadata context to compute table values
887 *
888 * Computes the table bases for the metadata structure.
889 * This is an internal function used by the image loader code.
890 */
891 void
892 mono_metadata_compute_table_bases (MonoImage *meta)
893 {
894 int i;
895 const char *base = meta->tables_base;
896
897 for (i = 0; i < MONO_TABLE_NUM; i++) {
898 MonoTableInfo *table = &meta->tables [i];
899 if (table->rows == 0)
900 continue;
901
902 table->row_size = mono_metadata_compute_size (meta, i, &table->size_bitfield);
903 table->base = base;
904 base += table->rows * table->row_size;
905 }
906 }
907
908 /**
909 * mono_metadata_locate:
910 * @meta: metadata context
911 * @table: table code.
912 * @idx: index of element to retrieve from @table.
913 *
914 * Returns: a pointer to the @idx element in the metadata table
915 * whose code is @table.
916 */
917 const char *
918 mono_metadata_locate (MonoImage *meta, int table, int idx)
919 {
920 /* idx == 0 refers always to NULL */
921 g_return_val_if_fail (idx > 0 && idx <= meta->tables [table].rows, ""); /*FIXME shouldn't we return NULL here?*/
922
923 return meta->tables [table].base + (meta->tables [table].row_size * (idx - 1));
924 }
925
926 /**
927 * mono_metadata_locate_token:
928 * @meta: metadata context
929 * @token: metadata token
930 *
931 * Returns: a pointer to the data in the metadata represented by the
932 * token #token.
933 */
934 const char *
935 mono_metadata_locate_token (MonoImage *meta, guint32 token)
936 {
937 return mono_metadata_locate (meta, token >> 24, token & 0xffffff);
938 }
939
940 /**
941 * mono_metadata_string_heap:
942 * @meta: metadata context
943 * @index: index into the string heap.
944 *
945 * Returns: an in-memory pointer to the @index in the string heap.
946 */
947 const char *
948 mono_metadata_string_heap (MonoImage *meta, guint32 index)
949 {
950 g_assert (index < meta->heap_strings.size);
951 g_return_val_if_fail (index < meta->heap_strings.size, "");
952 return meta->heap_strings.data + index;
953 }
954
955 /**
956 * mono_metadata_user_string:
957 * @meta: metadata context
958 * @index: index into the user string heap.
959 *
960 * Returns: an in-memory pointer to the @index in the user string heap ("#US").
961 */
962 const char *
963 mono_metadata_user_string (MonoImage *meta, guint32 index)
964 {
965 g_assert (index < meta->heap_us.size);
966 g_return_val_if_fail (index < meta->heap_us.size, "");
967 return meta->heap_us.data + index;
968 }
969
970 /**
971 * mono_metadata_blob_heap:
972 * @meta: metadata context
973 * @index: index into the blob.
974 *
975 * Returns: an in-memory pointer to the @index in the Blob heap.
976 */
977 const char *
978 mono_metadata_blob_heap (MonoImage *meta, guint32 index)
979 {
980 g_assert (index < meta->heap_blob.size);
981 g_return_val_if_fail (index < meta->heap_blob.size, "");/*FIXME shouldn't we return NULL and check for index == 0?*/
982 return meta->heap_blob.data + index;
983 }
984
985 /**
986 * mono_metadata_guid_heap:
987 * @meta: metadata context
988 * @index: index into the guid heap.
989 *
990 * Returns: an in-memory pointer to the @index in the guid heap.
991 */
992 const char *
993 mono_metadata_guid_heap (MonoImage *meta, guint32 index)
994 {
995 --index;
996 index *= 16; /* adjust for guid size and 1-based index */
997 g_return_val_if_fail (index < meta->heap_guid.size, "");
998 return meta->heap_guid.data + index;
999 }
1000
1001 static const unsigned char *
1002 dword_align (const unsigned char *ptr)
1003 {
1004 #if SIZEOF_VOID_P == 8
1005 return (const unsigned char *) (((guint64) (ptr + 3)) & ~3);
1006 #else
1007 return (const unsigned char *) (((guint32) (ptr + 3)) & ~3);
1008 #endif
1009 }
1010
1011 /**
1012 * mono_metadata_decode_row:
1013 * @t: table to extract information from.
1014 * @idx: index in table.
1015 * @res: array of @res_size cols to store the results in
1016 *
1017 * This decompresses the metadata element @idx in table @t
1018 * into the guint32 @res array that has res_size elements
1019 */
1020 void
1021 mono_metadata_decode_row (const MonoTableInfo *t, int idx, guint32 *res, int res_size)
1022 {
1023 guint32 bitfield = t->size_bitfield;
1024 int i, count = mono_metadata_table_count (bitfield);
1025 const char *data;
1026
1027 g_assert (idx < t->rows);
1028 g_assert (idx >= 0);
1029 data = t->base + idx * t->row_size;
1030
1031 g_assert (res_size == count);
1032
1033 for (i = 0; i < count; i++) {
1034 int n = mono_metadata_table_size (bitfield, i);
1035
1036 switch (n){
1037 case 1:
1038 res [i] = *data; break;
1039 case 2:
1040 res [i] = read16 (data); break;
1041 case 4:
1042 res [i] = read32 (data); break;
1043 default:
1044 g_assert_not_reached ();
1045 }
1046 data += n;
1047 }
1048 }
1049
1050 /**
1051 * mono_metadata_decode_row_col:
1052 * @t: table to extract information from.
1053 * @idx: index for row in table.
1054 * @col: column in the row.
1055 *
1056 * This function returns the value of column @col from the @idx
1057 * row in the table @t.
1058 */
1059 guint32
1060 mono_metadata_decode_row_col (const MonoTableInfo *t, int idx, guint col)
1061 {
1062 guint32 bitfield = t->size_bitfield;
1063 int i;
1064 register const char *data;
1065 register int n;
1066
1067 g_assert (idx < t->rows);
1068 g_assert (col < mono_metadata_table_count (bitfield));
1069 data = t->base + idx * t->row_size;
1070
1071 n = mono_metadata_table_size (bitfield, 0);
1072 for (i = 0; i < col; ++i) {
1073 data += n;
1074 n = mono_metadata_table_size (bitfield, i + 1);
1075 }
1076 switch (n) {
1077 case 1:
1078 return *data;
1079 case 2:
1080 return read16 (data);
1081 case 4:
1082 return read32 (data);
1083 default:
1084 g_assert_not_reached ();
1085 }
1086 return 0;
1087 }
1088
1089 /**
1090 * mono_metadata_decode_blob_size:
1091 * @ptr: pointer to a blob object
1092 * @rptr: the new position of the pointer
1093 *
1094 * This decodes a compressed size as described by 23.1.4 (a blob or user string object)
1095 *
1096 * Returns: the size of the blob object
1097 */
1098 guint32
1099 mono_metadata_decode_blob_size (const char *xptr, const char **rptr)
1100 {
1101 const unsigned char *ptr = (const unsigned char *)xptr;
1102 guint32 size;
1103
1104 if ((*ptr & 0x80) == 0){
1105 size = ptr [0] & 0x7f;
1106 ptr++;
1107 } else if ((*ptr & 0x40) == 0){
1108 size = ((ptr [0] & 0x3f) << 8) + ptr [1];
1109 ptr += 2;
1110 } else {
1111 size = ((ptr [0] & 0x1f) << 24) +
1112 (ptr [1] << 16) +
1113 (ptr [2] << 8) +
1114 ptr [3];
1115 ptr += 4;
1116 }
1117 if (rptr)
1118 *rptr = (char*)ptr;
1119 return size;
1120 }
1121
1122 /**
1123 * mono_metadata_decode_value:
1124 * @ptr: pointer to decode from
1125 * @rptr: the new position of the pointer
1126 *
1127 * This routine decompresses 32-bit values as specified in the "Blob and
1128 * Signature" section (22.2)
1129 *
1130 * Returns: the decoded value
1131 */
1132 guint32
1133 mono_metadata_decode_value (const char *_ptr, const char **rptr)
1134 {
1135 const unsigned char *ptr = (const unsigned char *) _ptr;
1136 unsigned char b = *ptr;
1137 guint32 len;
1138
1139 if ((b & 0x80) == 0){
1140 len = b;
1141 ++ptr;
1142 } else if ((b & 0x40) == 0){
1143 len = ((b & 0x3f) << 8 | ptr [1]);
1144 ptr += 2;
1145 } else {
1146 len = ((b & 0x1f) << 24) |
1147 (ptr [1] << 16) |
1148 (ptr [2] << 8) |
1149 ptr [3];
1150 ptr += 4;
1151 }
1152 if (rptr)
1153 *rptr = (char*)ptr;
1154
1155 return len;
1156 }
1157
1158 /**
1159 * mono_metadata_decode_signed_value:
1160 * @ptr: pointer to decode from
1161 * @rptr: the new position of the pointer
1162 *
1163 * This routine decompresses 32-bit signed values
1164 * (not specified in the spec)
1165 *
1166 * Returns: the decoded value
1167 */
1168 gint32
1169 mono_metadata_decode_signed_value (const char *ptr, const char **rptr)
1170 {
1171 guint32 uval = mono_metadata_decode_value (ptr, rptr);
1172 gint32 ival = uval >> 1;
1173 if (!(uval & 1))
1174 return ival;
1175 /* ival is a truncated 2's complement negative number. */
1176 if (ival < 0x40)
1177 /* 6 bits = 7 bits for compressed representation (top bit is '0') - 1 sign bit */
1178 return ival - 0x40;
1179 if (ival < 0x2000)
1180 /* 13 bits = 14 bits for compressed representation (top bits are '10') - 1 sign bit */
1181 return ival - 0x2000;
1182 if (ival < 0x10000000)
1183 /* 28 bits = 29 bits for compressed representation (top bits are '110') - 1 sign bit */
1184 return ival - 0x10000000;
1185 g_assert (ival < 0x20000000);
1186 g_warning ("compressed signed value appears to use 29 bits for compressed representation: %x (raw: %8x)", ival, uval);
1187 return ival - 0x20000000;
1188 }
1189
1190 /*
1191 * Translates the given 1-based index into the Method, Field, Event, or Param tables
1192 * using the *Ptr tables in uncompressed metadata, if they are available.
1193 *
1194 * FIXME: The caller is not forced to call this function, which is error-prone, since
1195 * forgetting to call it would only show up as a bug on uncompressed metadata.
1196 */
1197 guint32
1198 mono_metadata_translate_token_index (MonoImage *image, int table, guint32 idx)
1199 {
1200 if (!image->uncompressed_metadata)
1201 return idx;
1202
1203 switch (table) {
1204 case MONO_TABLE_METHOD:
1205 if (image->tables [MONO_TABLE_METHOD_POINTER].rows)
1206 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_METHOD_POINTER], idx - 1, MONO_METHOD_POINTER_METHOD);
1207 else
1208 return idx;
1209 case MONO_TABLE_FIELD:
1210 if (image->tables [MONO_TABLE_FIELD_POINTER].rows)
1211 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_FIELD_POINTER], idx - 1, MONO_FIELD_POINTER_FIELD);
1212 else
1213 return idx;
1214 case MONO_TABLE_EVENT:
1215 if (image->tables [MONO_TABLE_EVENT_POINTER].rows)
1216 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_EVENT_POINTER], idx - 1, MONO_EVENT_POINTER_EVENT);
1217 else
1218 return idx;
1219 case MONO_TABLE_PROPERTY:
1220 if (image->tables [MONO_TABLE_PROPERTY_POINTER].rows)
1221 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PROPERTY_POINTER], idx - 1, MONO_PROPERTY_POINTER_PROPERTY);
1222 else
1223 return idx;
1224 case MONO_TABLE_PARAM:
1225 if (image->tables [MONO_TABLE_PARAM_POINTER].rows)
1226 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PARAM_POINTER], idx - 1, MONO_PARAM_POINTER_PARAM);
1227 else
1228 return idx;
1229 default:
1230 return idx;
1231 }
1232 }
1233
1234 /**
1235 * mono_metadata_decode_table_row:
1236 *
1237 * Same as mono_metadata_decode_row, but takes an IMAGE+TABLE ID pair, and takes
1238 * uncompressed metadata into account, so it should be used to access the
1239 * Method, Field, Param and Event tables when the access is made from metadata, i.e.
1240 * IDX is retrieved from a metadata table, like MONO_TYPEDEF_FIELD_LIST.
1241 */
1242 void
1243 mono_metadata_decode_table_row (MonoImage *image, int table, int idx, guint32 *res, int res_size)
1244 {
1245 if (image->uncompressed_metadata)
1246 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1247
1248 mono_metadata_decode_row (&image->tables [table], idx, res, res_size);
1249 }
1250
1251 /**
1252 * mono_metadata_decode_table_row_col:
1253 *
1254 * Same as mono_metadata_decode_row_col, but takes an IMAGE+TABLE ID pair, and takes
1255 * uncompressed metadata into account, so it should be used to access the
1256 * Method, Field, Param and Event tables.
1257 */
1258 guint32 mono_metadata_decode_table_row_col (MonoImage *image, int table, int idx, guint col)
1259 {
1260 if (image->uncompressed_metadata)
1261 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1262
1263 return mono_metadata_decode_row_col (&image->tables [table], idx, col);
1264 }
1265
1266 /*
1267 * mono_metadata_parse_typedef_or_ref:
1268 * @m: a metadata context.
1269 * @ptr: a pointer to an encoded TypedefOrRef in @m
1270 * @rptr: pointer updated to match the end of the decoded stream
1271 *
1272 * Returns: a token valid in the @m metadata decoded from
1273 * the compressed representation.
1274 */
1275 guint32
1276 mono_metadata_parse_typedef_or_ref (MonoImage *m, const char *ptr, const char **rptr)
1277 {
1278 guint32 token;
1279 token = mono_metadata_decode_value (ptr, &ptr);
1280 if (rptr)
1281 *rptr = ptr;
1282 return mono_metadata_token_from_dor (token);
1283 }
1284
1285 /*
1286 * mono_metadata_parse_custom_mod:
1287 * @m: a metadata context.
1288 * @dest: storage where the info about the custom modifier is stored (may be NULL)
1289 * @ptr: a pointer to (possibly) the start of a custom modifier list
1290 * @rptr: pointer updated to match the end of the decoded stream
1291 *
1292 * Checks if @ptr points to a type custom modifier compressed representation.
1293 *
1294 * Returns: #TRUE if a custom modifier was found, #FALSE if not.
1295 */
1296 int
1297 mono_metadata_parse_custom_mod (MonoImage *m, MonoCustomMod *dest, const char *ptr, const char **rptr)
1298 {
1299 MonoCustomMod local;
1300 if ((*ptr == MONO_TYPE_CMOD_OPT) || (*ptr == MONO_TYPE_CMOD_REQD)) {
1301 if (!dest)
1302 dest = &local;
1303 dest->required = *ptr == MONO_TYPE_CMOD_REQD ? 1 : 0;
1304 dest->token = mono_metadata_parse_typedef_or_ref (m, ptr + 1, rptr);
1305 return TRUE;
1306 }
1307 return FALSE;
1308 }
1309
1310 /*
1311 * mono_metadata_parse_array_internal:
1312 * @m: a metadata context.
1313 * @transient: whenever to allocate data from the heap
1314 * @ptr: a pointer to an encoded array description.
1315 * @rptr: pointer updated to match the end of the decoded stream
1316 *
1317 * Decodes the compressed array description found in the metadata @m at @ptr.
1318 *
1319 * Returns: a #MonoArrayType structure describing the array type
1320 * and dimensions. Memory is allocated from the heap or from the image mempool, depending
1321 * on the value of @transient.
1322 *
1323 * LOCKING: Acquires the loader lock
1324 */
1325 static MonoArrayType *
1326 mono_metadata_parse_array_internal (MonoImage *m, MonoGenericContainer *container,
1327 gboolean transient, const char *ptr, const char **rptr, MonoError *error)
1328 {
1329 int i;
1330 MonoArrayType *array;
1331 MonoType *etype;
1332
1333 etype = mono_metadata_parse_type_checked (m, container, 0, FALSE, ptr, &ptr, error); //FIXME this doesn't respect @transient
1334 if (!etype)
1335 return NULL;
1336
1337 array = transient ? (MonoArrayType *)g_malloc0 (sizeof (MonoArrayType)) : (MonoArrayType *)mono_image_alloc0 (m, sizeof (MonoArrayType));
1338 array->eklass = mono_class_from_mono_type (etype);
1339 array->rank = mono_metadata_decode_value (ptr, &ptr);
1340
1341 array->numsizes = mono_metadata_decode_value (ptr, &ptr);
1342 if (array->numsizes)
1343 array->sizes = transient ? (int *)g_malloc0 (sizeof (int) * array->numsizes) : (int *)mono_image_alloc0 (m, sizeof (int) * array->numsizes);
1344 for (i = 0; i < array->numsizes; ++i)
1345 array->sizes [i] = mono_metadata_decode_value (ptr, &ptr);
1346
1347 array->numlobounds = mono_metadata_decode_value (ptr, &ptr);
1348 if (array->numlobounds)
1349 array->lobounds = transient ? (int *)g_malloc0 (sizeof (int) * array->numlobounds) : (int *)mono_image_alloc0 (m, sizeof (int) * array->numlobounds);
1350 for (i = 0; i < array->numlobounds; ++i)
1351 array->lobounds [i] = mono_metadata_decode_signed_value (ptr, &ptr);
1352
1353 if (rptr)
1354 *rptr = ptr;
1355 return array;
1356 }
1357
1358 MonoArrayType *
1359 mono_metadata_parse_array (MonoImage *m, const char *ptr, const char **rptr)
1360 {
1361 MonoError error;
1362 MonoArrayType *ret = mono_metadata_parse_array_internal (m, NULL, FALSE, ptr, rptr, &error);
1363 mono_error_cleanup (&error);
1364
1365 return ret;
1366 }
1367
1368 /*
1369 * mono_metadata_free_array:
1370 * @array: array description
1371 *
1372 * Frees the array description returned from mono_metadata_parse_array().
1373 */
1374 void
1375 mono_metadata_free_array (MonoArrayType *array)
1376 {
1377 g_free (array->sizes);
1378 g_free (array->lobounds);
1379 g_free (array);
1380 }
1381
1382 /*
1383 * need to add common field and param attributes combinations:
1384 * [out] param
1385 * public static
1386 * public static literal
1387 * private
1388 * private static
1389 * private static literal
1390 */
1391 static const MonoType
1392 builtin_types[] = {
1393 /* data, attrs, type, nmods, byref, pinned */
1394 {{NULL}, 0, MONO_TYPE_VOID, 0, 0, 0},
1395 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 0, 0},
1396 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 1, 0},
1397 {{NULL}, 0, MONO_TYPE_CHAR, 0, 0, 0},
1398 {{NULL}, 0, MONO_TYPE_CHAR, 0, 1, 0},
1399 {{NULL}, 0, MONO_TYPE_I1, 0, 0, 0},
1400 {{NULL}, 0, MONO_TYPE_I1, 0, 1, 0},
1401 {{NULL}, 0, MONO_TYPE_U1, 0, 0, 0},
1402 {{NULL}, 0, MONO_TYPE_U1, 0, 1, 0},
1403 {{NULL}, 0, MONO_TYPE_I2, 0, 0, 0},
1404 {{NULL}, 0, MONO_TYPE_I2, 0, 1, 0},
1405 {{NULL}, 0, MONO_TYPE_U2, 0, 0, 0},
1406 {{NULL}, 0, MONO_TYPE_U2, 0, 1, 0},
1407 {{NULL}, 0, MONO_TYPE_I4, 0, 0, 0},
1408 {{NULL}, 0, MONO_TYPE_I4, 0, 1, 0},
1409 {{NULL}, 0, MONO_TYPE_U4, 0, 0, 0},
1410 {{NULL}, 0, MONO_TYPE_U4, 0, 1, 0},
1411 {{NULL}, 0, MONO_TYPE_I8, 0, 0, 0},
1412 {{NULL}, 0, MONO_TYPE_I8, 0, 1, 0},
1413 {{NULL}, 0, MONO_TYPE_U8, 0, 0, 0},
1414 {{NULL}, 0, MONO_TYPE_U8, 0, 1, 0},
1415 {{NULL}, 0, MONO_TYPE_R4, 0, 0, 0},
1416 {{NULL}, 0, MONO_TYPE_R4, 0, 1, 0},
1417 {{NULL}, 0, MONO_TYPE_R8, 0, 0, 0},
1418 {{NULL}, 0, MONO_TYPE_R8, 0, 1, 0},
1419 {{NULL}, 0, MONO_TYPE_STRING, 0, 0, 0},
1420 {{NULL}, 0, MONO_TYPE_STRING, 0, 1, 0},
1421 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 0, 0},
1422 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 1, 0},
1423 {{NULL}, 0, MONO_TYPE_TYPEDBYREF, 0, 0, 0},
1424 {{NULL}, 0, MONO_TYPE_I, 0, 0, 0},
1425 {{NULL}, 0, MONO_TYPE_I, 0, 1, 0},
1426 {{NULL}, 0, MONO_TYPE_U, 0, 0, 0},
1427 {{NULL}, 0, MONO_TYPE_U, 0, 1, 0},
1428 };
1429
1430 #define NBUILTIN_TYPES() (sizeof (builtin_types) / sizeof (builtin_types [0]))
1431
1432 static GHashTable *type_cache = NULL;
1433 static int next_generic_inst_id = 0;
1434
1435 /* Protected by image_sets_mutex */
1436 static MonoImageSet *mscorlib_image_set;
1437 /* Protected by image_sets_mutex */
1438 static GPtrArray *image_sets;
1439 static mono_mutex_t image_sets_mutex;
1440
1441 static guint mono_generic_class_hash (gconstpointer data);
1442
1443 /*
1444 * MonoTypes with modifies are never cached, so we never check or use that field.
1445 */
1446 static guint
1447 mono_type_hash (gconstpointer data)
1448 {
1449 const MonoType *type = (const MonoType *) data;
1450 if (type->type == MONO_TYPE_GENERICINST)
1451 return mono_generic_class_hash (type->data.generic_class);
1452 else
1453 return type->type | (type->byref << 8) | (type->attrs << 9);
1454 }
1455
1456 static gint
1457 mono_type_equal (gconstpointer ka, gconstpointer kb)
1458 {
1459 const MonoType *a = (const MonoType *) ka;
1460 const MonoType *b = (const MonoType *) kb;
1461
1462 if (a->type != b->type || a->byref != b->byref || a->attrs != b->attrs || a->pinned != b->pinned)
1463 return 0;
1464 /* need other checks */
1465 return 1;
1466 }
1467
1468 guint
1469 mono_metadata_generic_inst_hash (gconstpointer data)
1470 {
1471 const MonoGenericInst *ginst = (const MonoGenericInst *) data;
1472 guint hash = 0;
1473 int i;
1474
1475 for (i = 0; i < ginst->type_argc; ++i) {
1476 hash *= 13;
1477 hash += mono_metadata_type_hash (ginst->type_argv [i]);
1478 }
1479
1480 return hash ^ (ginst->is_open << 8);
1481 }
1482
1483 static gboolean
1484 mono_generic_inst_equal_full (const MonoGenericInst *a, const MonoGenericInst *b, gboolean signature_only)
1485 {
1486 int i;
1487
1488 // An optimization: if the ids of two insts are the same, we know they are the same inst and don't check contents.
1489 // Furthermore, because we perform early de-duping, if the ids differ, we know the contents differ.
1490 #ifndef MONO_SMALL_CONFIG // Optimization does not work in MONO_SMALL_CONFIG: There are no IDs
1491 if (a->id && b->id) { // "id 0" means "object has no id"-- de-duping hasn't been performed yet, must check contents.
1492 if (a->id == b->id)
1493 return TRUE;
1494 // In signature-comparison mode id equality implies object equality, but this is not true for inequality.
1495 // Two separate objects could have signature-equavalent contents.
1496 if (!signature_only)
1497 return FALSE;
1498 }
1499 #endif
1500
1501 if (a->is_open != b->is_open || a->type_argc != b->type_argc)
1502 return FALSE;
1503 for (i = 0; i < a->type_argc; ++i) {
1504 if (!do_mono_metadata_type_equal (a->type_argv [i], b->type_argv [i], signature_only))
1505 return FALSE;
1506 }
1507 return TRUE;
1508 }
1509
1510 gboolean
1511 mono_metadata_generic_inst_equal (gconstpointer ka, gconstpointer kb)
1512 {
1513 const MonoGenericInst *a = (const MonoGenericInst *) ka;
1514 const MonoGenericInst *b = (const MonoGenericInst *) kb;
1515
1516 return mono_generic_inst_equal_full (a, b, FALSE);
1517 }
1518
1519 static guint
1520 mono_generic_class_hash (gconstpointer data)
1521 {
1522 const MonoGenericClass *gclass = (const MonoGenericClass *) data;
1523 guint hash = mono_metadata_type_hash (&gclass->container_class->byval_arg);
1524
1525 hash *= 13;
1526 hash += gclass->is_tb_open;
1527 hash += mono_metadata_generic_context_hash (&gclass->context);
1528
1529 return hash;
1530 }
1531
1532 static gboolean
1533 mono_generic_class_equal (gconstpointer ka, gconstpointer kb)
1534 {
1535 const MonoGenericClass *a = (const MonoGenericClass *) ka;
1536 const MonoGenericClass *b = (const MonoGenericClass *) kb;
1537
1538 return _mono_metadata_generic_class_equal (a, b, FALSE);
1539 }
1540
1541 /**
1542 * mono_metadata_init:
1543 *
1544 * Initialize the global variables of this module.
1545 * This is a Mono runtime internal function.
1546 */
1547 void
1548 mono_metadata_init (void)
1549 {
1550 int i;
1551
1552 type_cache = g_hash_table_new (mono_type_hash, mono_type_equal);
1553
1554 for (i = 0; i < NBUILTIN_TYPES (); ++i)
1555 g_hash_table_insert (type_cache, (gpointer) &builtin_types [i], (gpointer) &builtin_types [i]);
1556
1557 mono_os_mutex_init_recursive (&image_sets_mutex);
1558 }
1559
1560 /**
1561 * mono_metadata_cleanup:
1562 *
1563 * Free all resources used by this module.
1564 * This is a Mono runtime internal function.
1565 */
1566 void
1567 mono_metadata_cleanup (void)
1568 {
1569 g_hash_table_destroy (type_cache);
1570 type_cache = NULL;
1571 g_ptr_array_free (image_sets, TRUE);
1572 image_sets = NULL;
1573 mono_os_mutex_destroy (&image_sets_mutex);
1574 }
1575
1576 /**
1577 * mono_metadata_parse_type:
1578 * @m: metadata context
1579 * @mode: king of type that may be found at @ptr
1580 * @opt_attrs: optional attributes to store in the returned type
1581 * @ptr: pointer to the type representation
1582 * @rptr: pointer updated to match the end of the decoded stream
1583 * @transient: whenever to allocate the result from the heap or from a mempool
1584 *
1585 * Decode a compressed type description found at @ptr in @m.
1586 * @mode can be one of MONO_PARSE_MOD_TYPE, MONO_PARSE_PARAM, MONO_PARSE_RET,
1587 * MONO_PARSE_FIELD, MONO_PARSE_LOCAL, MONO_PARSE_TYPE.
1588 * This function can be used to decode type descriptions in method signatures,
1589 * field signatures, locals signatures etc.
1590 *
1591 * To parse a generic type, `generic_container' points to the current class'es
1592 * (the `generic_container' field in the MonoClass) or the current generic method's
1593 * (stored in image->property_hash) generic container.
1594 * When we encounter any MONO_TYPE_VAR or MONO_TYPE_MVAR's, they're looked up in
1595 * this MonoGenericContainer.
1596 *
1597 * LOCKING: Acquires the loader lock.
1598 *
1599 * Returns: a #MonoType structure representing the decoded type.
1600 */
1601 static MonoType*
1602 mono_metadata_parse_type_internal (MonoImage *m, MonoGenericContainer *container,
1603 short opt_attrs, gboolean transient, const char *ptr, const char **rptr, MonoError *error)
1604 {
1605 MonoType *type, *cached;
1606 MonoType stype;
1607 gboolean byref = FALSE;
1608 gboolean pinned = FALSE;
1609 const char *tmp_ptr;
1610 int count = 0; // Number of mod arguments
1611 gboolean found;
1612
1613 mono_error_init (error);
1614
1615 /*
1616 * According to the spec, custom modifiers should come before the byref
1617 * flag, but the IL produced by ilasm from the following signature:
1618 * object modopt(...) &
1619 * starts with a byref flag, followed by the modifiers. (bug #49802)
1620 * Also, this type seems to be different from 'object & modopt(...)'. Maybe
1621 * it would be better to treat byref as real type constructor instead of
1622 * a modifier...
1623 * Also, pinned should come before anything else, but some MSV++ produced
1624 * assemblies violate this (#bug 61990).
1625 */
1626
1627 /* Count the modifiers first */
1628 tmp_ptr = ptr;
1629 found = TRUE;
1630 while (found) {
1631 switch (*tmp_ptr) {
1632 case MONO_TYPE_PINNED:
1633 case MONO_TYPE_BYREF:
1634 ++tmp_ptr;
1635 break;
1636 case MONO_TYPE_CMOD_REQD:
1637 case MONO_TYPE_CMOD_OPT:
1638 count ++;
1639 mono_metadata_parse_custom_mod (m, NULL, tmp_ptr, &tmp_ptr);
1640 break;
1641 default:
1642 found = FALSE;
1643 }
1644 }
1645
1646 if (count) { // There are mods, so the MonoType will be of nonstandard size.
1647 int size;
1648
1649 size = MONO_SIZEOF_TYPE + ((gint32)count) * sizeof (MonoCustomMod);
1650 type = transient ? (MonoType *)g_malloc0 (size) : (MonoType *)mono_image_alloc0 (m, size);
1651 type->num_mods = count;
1652 if (count > 64) {
1653 mono_error_set_bad_image (error, m, "Invalid type with more than 64 modifiers");
1654 return NULL;
1655 }
1656 } else { // The type is of standard size, so we can allocate it on the stack.
1657 type = &stype;
1658 memset (type, 0, MONO_SIZEOF_TYPE);
1659 }
1660
1661 /* Iterate again, but now parse pinned, byref and custom modifiers */
1662 found = TRUE;
1663 count = 0;
1664 while (found) {
1665 switch (*ptr) {
1666 case MONO_TYPE_PINNED:
1667 pinned = TRUE;
1668 ++ptr;
1669 break;
1670 case MONO_TYPE_BYREF:
1671 byref = TRUE;
1672 ++ptr;
1673 break;
1674 case MONO_TYPE_CMOD_REQD:
1675 case MONO_TYPE_CMOD_OPT:
1676 mono_metadata_parse_custom_mod (m, &(type->modifiers [count]), ptr, &ptr);
1677 count ++;
1678 break;
1679 default:
1680 found = FALSE;
1681 }
1682 }
1683
1684 type->attrs = opt_attrs;
1685 type->byref = byref;
1686 type->pinned = pinned ? 1 : 0;
1687
1688 if (!do_mono_metadata_parse_type (type, m, container, transient, ptr, &ptr, error))
1689 return NULL;
1690
1691 if (rptr)
1692 *rptr = ptr;
1693
1694 // Possibly we can return an already-allocated type instead of the one we decoded
1695 if (!type->num_mods && !transient) {
1696 /* no need to free type here, because it is on the stack */
1697 if ((type->type == MONO_TYPE_CLASS || type->type == MONO_TYPE_VALUETYPE) && !type->pinned && !type->attrs) {
1698 MonoType *ret = type->byref ? &type->data.klass->this_arg : &type->data.klass->byval_arg;
1699
1700 /* Consider the case:
1701
1702 class Foo<T> { class Bar {} }
1703 class Test : Foo<Test>.Bar {}
1704
1705 When Foo<Test> is being expanded, 'Test' isn't yet initialized. It's actually in
1706 a really pristine state: it doesn't even know whether 'Test' is a reference or a value type.
1707
1708 We ensure that the MonoClass is in a state that we can canonicalize to:
1709
1710 klass->byval_arg.data.klass == klass
1711 klass->this_arg.data.klass == klass
1712
1713 If we can't canonicalize 'type', it doesn't matter, since later users of 'type' will do it.
1714
1715 LOCKING: even though we don't explicitly hold a lock, in the problematic case 'ret' is a field
1716 of a MonoClass which currently holds the loader lock. 'type' is local.
1717 */
1718 if (ret->data.klass == type->data.klass) {
1719 return ret;
1720 }
1721 }
1722 /* No need to use locking since nobody is modifying the hash table */
1723 if ((cached = (MonoType *)g_hash_table_lookup (type_cache, type))) {
1724 return cached;
1725 }
1726 }
1727
1728 /* printf ("%x %x %c %s\n", type->attrs, type->num_mods, type->pinned ? 'p' : ' ', mono_type_full_name (type)); */
1729
1730 if (type == &stype) { // Type was allocated on the stack, so we need to copy it to safety
1731 type = transient ? (MonoType *)g_malloc (MONO_SIZEOF_TYPE) : (MonoType *)mono_image_alloc (m, MONO_SIZEOF_TYPE);
1732 memcpy (type, &stype, MONO_SIZEOF_TYPE);
1733 }
1734 return type;
1735 }
1736
1737
1738 MonoType*
1739 mono_metadata_parse_type_checked (MonoImage *m, MonoGenericContainer *container,
1740 short opt_attrs, gboolean transient, const char *ptr, const char **rptr, MonoError *error)
1741 {
1742 return mono_metadata_parse_type_internal (m, container, opt_attrs, transient, ptr, rptr, error);
1743 }
1744
1745 /*
1746 * LOCKING: Acquires the loader lock.
1747 */
1748 MonoType*
1749 mono_metadata_parse_type (MonoImage *m, MonoParseTypeMode mode, short opt_attrs,
1750 const char *ptr, const char **rptr)
1751 {
1752 MonoError error;
1753 MonoType * type = mono_metadata_parse_type_internal (m, NULL, opt_attrs, FALSE, ptr, rptr, &error);
1754 mono_error_cleanup (&error);
1755 return type;
1756 }
1757
1758 gboolean
1759 mono_metadata_method_has_param_attrs (MonoImage *m, int def)
1760 {
1761 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1762 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1763 guint lastp, i, param_index = mono_metadata_decode_row_col (methodt, def - 1, MONO_METHOD_PARAMLIST);
1764
1765 if (def < methodt->rows)
1766 lastp = mono_metadata_decode_row_col (methodt, def, MONO_METHOD_PARAMLIST);
1767 else
1768 lastp = m->tables [MONO_TABLE_PARAM].rows + 1;
1769
1770 for (i = param_index; i < lastp; ++i) {
1771 guint32 flags = mono_metadata_decode_row_col (paramt, i - 1, MONO_PARAM_FLAGS);
1772 if (flags)
1773 return TRUE;
1774 }
1775
1776 return FALSE;
1777 }
1778
1779 /*
1780 * mono_metadata_get_param_attrs:
1781 *
1782 * @m The image to loader parameter attributes from
1783 * @def method def token (one based)
1784 * @param_count number of params to decode including the return value
1785 *
1786 * Return the parameter attributes for the method whose MethodDef index is DEF. The
1787 * returned memory needs to be freed by the caller. If all the param attributes are
1788 * 0, then NULL is returned.
1789 */
1790 int*
1791 mono_metadata_get_param_attrs (MonoImage *m, int def, int param_count)
1792 {
1793 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1794 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1795 guint32 cols [MONO_PARAM_SIZE];
1796 guint lastp, i, param_index = mono_metadata_decode_row_col (methodt, def - 1, MONO_METHOD_PARAMLIST);
1797 int *pattrs = NULL;
1798
1799 if (def < methodt->rows)
1800 lastp = mono_metadata_decode_row_col (methodt, def, MONO_METHOD_PARAMLIST);
1801 else
1802 lastp = paramt->rows + 1;
1803
1804 for (i = param_index; i < lastp; ++i) {
1805 mono_metadata_decode_row (paramt, i - 1, cols, MONO_PARAM_SIZE);
1806 if (cols [MONO_PARAM_FLAGS]) {
1807 if (!pattrs)
1808 pattrs = g_new0 (int, param_count);
1809 /* at runtime we just ignore this kind of malformed file:
1810 * the verifier can signal the error to the user
1811 */
1812 if (cols [MONO_PARAM_SEQUENCE] >= param_count)
1813 continue;
1814 pattrs [cols [MONO_PARAM_SEQUENCE]] = cols [MONO_PARAM_FLAGS];
1815 }
1816 }
1817
1818 return pattrs;
1819 }
1820
1821
1822 /*
1823 * mono_metadata_parse_signature:
1824 * @image: metadata context
1825 * @token: metadata token
1826 *
1827 * Decode a method signature stored in the STANDALONESIG table
1828 *
1829 * Returns: a MonoMethodSignature describing the signature.
1830 */
1831 MonoMethodSignature*
1832 mono_metadata_parse_signature (MonoImage *image, guint32 token)
1833 {
1834 MonoError error;
1835 MonoMethodSignature *ret;
1836 ret = mono_metadata_parse_signature_checked (image, token, &error);
1837 mono_error_cleanup (&error);
1838 return ret;
1839 }
1840
1841 /*
1842 * mono_metadata_parse_signature_checked:
1843 * @image: metadata context
1844 * @token: metadata token
1845 * @error: set on error
1846 *
1847 * Decode a method signature stored in the STANDALONESIG table
1848 *
1849 * Returns: a MonoMethodSignature describing the signature. On failure
1850 * returns NULL and sets @error.
1851 */
1852 MonoMethodSignature*
1853 mono_metadata_parse_signature_checked (MonoImage *image, guint32 token, MonoError *error)
1854 {
1855
1856 mono_error_init (error);
1857 MonoTableInfo *tables = image->tables;
1858 guint32 idx = mono_metadata_token_index (token);
1859 guint32 sig;
1860 const char *ptr;
1861
1862 if (image_is_dynamic (image)) {
1863 return (MonoMethodSignature *)mono_lookup_dynamic_token (image, token, NULL, error);
1864 }
1865
1866 g_assert (mono_metadata_token_table(token) == MONO_TABLE_STANDALONESIG);
1867
1868 sig = mono_metadata_decode_row_col (&tables [MONO_TABLE_STANDALONESIG], idx - 1, 0);
1869
1870 ptr = mono_metadata_blob_heap (image, sig);
1871 mono_metadata_decode_blob_size (ptr, &ptr);
1872
1873 return mono_metadata_parse_method_signature_full (image, NULL, 0, ptr, NULL, error);
1874 }
1875
1876 /*
1877 * mono_metadata_signature_alloc:
1878 * @image: metadata context
1879 * @nparmas: number of parameters in the signature
1880 *
1881 * Allocate a MonoMethodSignature structure with the specified number of params.
1882 * The return type and the params types need to be filled later.
1883 * This is a Mono runtime internal function.
1884 *
1885 * LOCKING: Assumes the loader lock is held.
1886 *
1887 * Returns: the new MonoMethodSignature structure.
1888 */
1889 MonoMethodSignature*
1890 mono_metadata_signature_alloc (MonoImage *m, guint32 nparams)
1891 {
1892 MonoMethodSignature *sig;
1893
1894 sig = (MonoMethodSignature *)mono_image_alloc0 (m, MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)nparams) * sizeof (MonoType*));
1895 sig->param_count = nparams;
1896 sig->sentinelpos = -1;
1897
1898 return sig;
1899 }
1900
1901 static MonoMethodSignature*
1902 mono_metadata_signature_dup_internal_with_padding (MonoImage *image, MonoMemPool *mp, MonoMethodSignature *sig, size_t padding)
1903 {
1904 int sigsize, sig_header_size;
1905 MonoMethodSignature *ret;
1906 sigsize = sig_header_size = MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *) + padding;
1907 if (sig->ret)
1908 sigsize += MONO_SIZEOF_TYPE;
1909
1910 if (image) {
1911 ret = (MonoMethodSignature *)mono_image_alloc (image, sigsize);
1912 } else if (mp) {
1913 ret = (MonoMethodSignature *)mono_mempool_alloc (mp, sigsize);
1914 } else {
1915 ret = (MonoMethodSignature *)g_malloc (sigsize);
1916 }
1917
1918 memcpy (ret, sig, sig_header_size - padding);
1919
1920 // Copy return value because of ownership semantics.
1921 if (sig->ret) {
1922 // Danger! Do not alter padding use without changing the dup_add_this below
1923 intptr_t end_of_header = (intptr_t)( (char*)(ret) + sig_header_size);
1924 ret->ret = (MonoType *)end_of_header;
1925 memcpy (ret->ret, sig->ret, MONO_SIZEOF_TYPE);
1926 }
1927
1928 return ret;
1929 }
1930
1931 static MonoMethodSignature*
1932 mono_metadata_signature_dup_internal (MonoImage *image, MonoMemPool *mp, MonoMethodSignature *sig)
1933 {
1934 return mono_metadata_signature_dup_internal_with_padding (image, mp, sig, 0);
1935 }
1936 /*
1937 * signature_dup_add_this:
1938 *
1939 * Make a copy of @sig, adding an explicit this argument.
1940 */
1941 MonoMethodSignature*
1942 mono_metadata_signature_dup_add_this (MonoImage *image, MonoMethodSignature *sig, MonoClass *klass)
1943 {
1944 MonoMethodSignature *ret;
1945 ret = mono_metadata_signature_dup_internal_with_padding (image, NULL, sig, sizeof (MonoType *));
1946
1947 ret->param_count = sig->param_count + 1;
1948 ret->hasthis = FALSE;
1949
1950 for (int i = sig->param_count - 1; i >= 0; i --)
1951 ret->params [i + 1] = sig->params [i];
1952 ret->params [0] = klass->valuetype ? &klass->this_arg : &klass->byval_arg;
1953
1954 for (int i = sig->param_count - 1; i >= 0; i --)
1955 g_assert(ret->params [i + 1]->type == sig->params [i]->type && ret->params [i+1]->type != MONO_TYPE_END);
1956 g_assert (ret->ret->type == sig->ret->type && ret->ret->type != MONO_TYPE_END);
1957
1958 return ret;
1959 }
1960
1961
1962
1963 MonoMethodSignature*
1964 mono_metadata_signature_dup_full (MonoImage *image, MonoMethodSignature *sig)
1965 {
1966 MonoMethodSignature *ret = mono_metadata_signature_dup_internal (image, NULL, sig);
1967
1968 for (int i = 0 ; i < sig->param_count; i ++)
1969 g_assert(ret->params [i]->type == sig->params [i]->type);
1970 g_assert (ret->ret->type == sig->ret->type);
1971
1972 return ret;
1973 }
1974
1975 /*The mempool is accessed without synchronization*/
1976 MonoMethodSignature*
1977 mono_metadata_signature_dup_mempool (MonoMemPool *mp, MonoMethodSignature *sig)
1978 {
1979 return mono_metadata_signature_dup_internal (NULL, mp, sig);
1980 }
1981
1982 /*
1983 * mono_metadata_signature_dup:
1984 * @sig: method signature
1985 *
1986 * Duplicate an existing MonoMethodSignature so it can be modified.
1987 * This is a Mono runtime internal function.
1988 *
1989 * Returns: the new MonoMethodSignature structure.
1990 */
1991 MonoMethodSignature*
1992 mono_metadata_signature_dup (MonoMethodSignature *sig)
1993 {
1994 return mono_metadata_signature_dup_full (NULL, sig);
1995 }
1996
1997 /*
1998 * mono_metadata_signature_size:
1999 *
2000 * Return the amount of memory allocated to SIG.
2001 */
2002 guint32
2003 mono_metadata_signature_size (MonoMethodSignature *sig)
2004 {
2005 return MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *);
2006 }
2007
2008 /*
2009 * mono_metadata_parse_method_signature:
2010 * @m: metadata context
2011 * @generic_container: generics container
2012 * @def: the MethodDef index or 0 for Ref signatures.
2013 * @ptr: pointer to the signature metadata representation
2014 * @rptr: pointer updated to match the end of the decoded stream
2015 *
2016 * Decode a method signature stored at @ptr.
2017 * This is a Mono runtime internal function.
2018 *
2019 * LOCKING: Assumes the loader lock is held.
2020 *
2021 * Returns: a MonoMethodSignature describing the signature.
2022 */
2023 MonoMethodSignature *
2024 mono_metadata_parse_method_signature_full (MonoImage *m, MonoGenericContainer *container,
2025 int def, const char *ptr, const char **rptr, MonoError *error)
2026 {
2027 MonoMethodSignature *method;
2028 int i, *pattrs = NULL;
2029 guint32 hasthis = 0, explicit_this = 0, call_convention, param_count;
2030 guint32 gen_param_count = 0;
2031 gboolean is_open = FALSE;
2032
2033 mono_error_init (error);
2034
2035 if (*ptr & 0x10)
2036 gen_param_count = 1;
2037 if (*ptr & 0x20)
2038 hasthis = 1;
2039 if (*ptr & 0x40)
2040 explicit_this = 1;
2041 call_convention = *ptr & 0x0F;
2042 ptr++;
2043 if (gen_param_count)
2044 gen_param_count = mono_metadata_decode_value (ptr, &ptr);
2045 param_count = mono_metadata_decode_value (ptr, &ptr);
2046
2047 if (def)
2048 pattrs = mono_metadata_get_param_attrs (m, def, param_count + 1); /*Must be + 1 since signature's param count doesn't account for the return value */
2049
2050 method = mono_metadata_signature_alloc (m, param_count);
2051 method->hasthis = hasthis;
2052 method->explicit_this = explicit_this;
2053 method->call_convention = call_convention;
2054 method->generic_param_count = gen_param_count;
2055
2056 if (call_convention != 0xa) {
2057 method->ret = mono_metadata_parse_type_checked (m, container, pattrs ? pattrs [0] : 0, FALSE, ptr, &ptr, error);
2058 if (!method->ret) {
2059 mono_metadata_free_method_signature (method);
2060 g_free (pattrs);
2061 return NULL;
2062 }
2063 is_open = mono_class_is_open_constructed_type (method->ret);
2064 }
2065
2066 for (i = 0; i < method->param_count; ++i) {
2067 if (*ptr == MONO_TYPE_SENTINEL) {
2068 if (method->call_convention != MONO_CALL_VARARG || def) {
2069 mono_error_set_bad_image (error, m, "Found sentinel for methoddef or no vararg");
2070 g_free (pattrs);
2071 return NULL;
2072 }
2073 if (method->sentinelpos >= 0) {
2074 mono_error_set_bad_image (error, m, "Found sentinel twice in the same signature.");
2075 g_free (pattrs);
2076 return NULL;
2077 }
2078 method->sentinelpos = i;
2079 ptr++;
2080 }
2081 method->params [i] = mono_metadata_parse_type_checked (m, container, pattrs ? pattrs [i+1] : 0, FALSE, ptr, &ptr, error);
2082 if (!method->params [i]) {
2083 mono_metadata_free_method_signature (method);
2084 g_free (pattrs);
2085 return NULL;
2086 }
2087 if (!is_open)
2088 is_open = mono_class_is_open_constructed_type (method->params [i]);
2089 }
2090
2091 /* The sentinel could be missing if the caller does not pass any additional arguments */
2092 if (!def && method->call_convention == MONO_CALL_VARARG && method->sentinelpos < 0)
2093 method->sentinelpos = method->param_count;
2094
2095 method->has_type_parameters = is_open;
2096
2097 if (def && (method->call_convention == MONO_CALL_VARARG))
2098 method->sentinelpos = method->param_count;
2099
2100 g_free (pattrs);
2101
2102 if (rptr)
2103 *rptr = ptr;
2104 /*
2105 * Add signature to a cache and increase ref count...
2106 */
2107
2108 return method;
2109 }
2110
2111 /*
2112 * mono_metadata_parse_method_signature:
2113 * @m: metadata context
2114 * @def: the MethodDef index or 0 for Ref signatures.
2115 * @ptr: pointer to the signature metadata representation
2116 * @rptr: pointer updated to match the end of the decoded stream
2117 *
2118 * Decode a method signature stored at @ptr.
2119 * This is a Mono runtime internal function.
2120 *
2121 * LOCKING: Assumes the loader lock is held.
2122 *
2123 * Returns: a MonoMethodSignature describing the signature.
2124 */
2125 MonoMethodSignature *
2126 mono_metadata_parse_method_signature (MonoImage *m, int def, const char *ptr, const char **rptr)
2127 {
2128 /*
2129 * This function MUST NOT be called by runtime code as it does error handling incorrectly.
2130 * Use mono_metadata_parse_method_signature_full instead.
2131 * It's ok to asser on failure as we no longer use it.
2132 */
2133 MonoError error;
2134 MonoMethodSignature *ret;
2135 ret = mono_metadata_parse_method_signature_full (m, NULL, def, ptr, rptr, &error);
2136 g_assert (mono_error_ok (&error));
2137
2138 return ret;
2139 }
2140
2141 /*
2142 * mono_metadata_free_method_signature:
2143 * @sig: signature to destroy
2144 *
2145 * Free the memory allocated in the signature @sig.
2146 * This method needs to be robust and work also on partially-built
2147 * signatures, so it does extra checks.
2148 */
2149 void
2150 mono_metadata_free_method_signature (MonoMethodSignature *sig)
2151 {
2152 /* Everything is allocated from mempools */
2153 /*
2154 int i;
2155 if (sig->ret)
2156 mono_metadata_free_type (sig->ret);
2157 for (i = 0; i < sig->param_count; ++i) {
2158 if (sig->params [i])
2159 mono_metadata_free_type (sig->params [i]);
2160 }
2161 */
2162 }
2163
2164 void
2165 mono_metadata_free_inflated_signature (MonoMethodSignature *sig)
2166 {
2167 int i;
2168
2169 /* Allocated in inflate_generic_signature () */
2170 if (sig->ret)
2171 mono_metadata_free_type (sig->ret);
2172 for (i = 0; i < sig->param_count; ++i) {
2173 if (sig->params [i])
2174 mono_metadata_free_type (sig->params [i]);
2175 }
2176 g_free (sig);
2177 }
2178
2179 static gboolean
2180 inflated_method_equal (gconstpointer a, gconstpointer b)
2181 {
2182 const MonoMethodInflated *ma = (const MonoMethodInflated *)a;
2183 const MonoMethodInflated *mb = (const MonoMethodInflated *)b;
2184 if (ma->declaring != mb->declaring)
2185 return FALSE;
2186 return mono_metadata_generic_context_equal (&ma->context, &mb->context);
2187 }
2188
2189 static guint
2190 inflated_method_hash (gconstpointer a)
2191 {
2192 const MonoMethodInflated *ma = (const MonoMethodInflated *)a;
2193 return (mono_metadata_generic_context_hash (&ma->context) ^ mono_aligned_addr_hash (ma->declaring));
2194 }
2195
2196 static gboolean
2197 inflated_signature_equal (gconstpointer a, gconstpointer b)
2198 {
2199 const MonoInflatedMethodSignature *sig1 = (const MonoInflatedMethodSignature *)a;
2200 const MonoInflatedMethodSignature *sig2 = (const MonoInflatedMethodSignature *)b;
2201
2202 /* sig->sig is assumed to be canonized */
2203 if (sig1->sig != sig2->sig)
2204 return FALSE;
2205 /* The generic instances are canonized */
2206 return mono_metadata_generic_context_equal (&sig1->context, &sig2->context);
2207 }
2208
2209 static guint
2210 inflated_signature_hash (gconstpointer a)
2211 {
2212 const MonoInflatedMethodSignature *sig = (const MonoInflatedMethodSignature *)a;
2213
2214 /* sig->sig is assumed to be canonized */
2215 return mono_metadata_generic_context_hash (&sig->context) ^ mono_aligned_addr_hash (sig->sig);
2216 }
2217
2218 /*static void
2219 dump_ginst (MonoGenericInst *ginst)
2220 {
2221 int i;
2222 char *name;
2223
2224 g_print ("Ginst: <");
2225 for (i = 0; i < ginst->type_argc; ++i) {
2226 if (i != 0)
2227 g_print (", ");
2228 name = mono_type_get_name (ginst->type_argv [i]);
2229 g_print ("%s", name);
2230 g_free (name);
2231 }
2232 g_print (">");
2233 }*/
2234
2235 static gboolean type_in_image (MonoType *type, MonoImage *image);
2236
2237 static gboolean
2238 signature_in_image (MonoMethodSignature *sig, MonoImage *image)
2239 {
2240 gpointer iter = NULL;
2241 MonoType *p;
2242
2243 while ((p = mono_signature_get_params (sig, &iter)) != NULL)
2244 if (type_in_image (p, image))
2245 return TRUE;
2246
2247 return type_in_image (mono_signature_get_return_type (sig), image);
2248 }
2249
2250 static gboolean
2251 ginst_in_image (MonoGenericInst *ginst, MonoImage *image)
2252 {
2253 int i;
2254
2255 for (i = 0; i < ginst->type_argc; ++i) {
2256 if (type_in_image (ginst->type_argv [i], image))
2257 return TRUE;
2258 }
2259
2260 return FALSE;
2261 }
2262
2263 static gboolean
2264 gclass_in_image (MonoGenericClass *gclass, MonoImage *image)
2265 {
2266 return gclass->container_class->image == image ||
2267 ginst_in_image (gclass->context.class_inst, image);
2268 }
2269
2270 static gboolean
2271 type_in_image (MonoType *type, MonoImage *image)
2272 {
2273 retry:
2274 switch (type->type) {
2275 case MONO_TYPE_GENERICINST:
2276 return gclass_in_image (type->data.generic_class, image);
2277 case MONO_TYPE_PTR:
2278 type = type->data.type;
2279 goto retry;
2280 case MONO_TYPE_SZARRAY:
2281 type = &type->data.klass->byval_arg;
2282 goto retry;
2283 case MONO_TYPE_ARRAY:
2284 type = &type->data.array->eklass->byval_arg;
2285 goto retry;
2286 case MONO_TYPE_FNPTR:
2287 return signature_in_image (type->data.method, image);
2288 case MONO_TYPE_VAR:
2289 case MONO_TYPE_MVAR:
2290 return image == get_image_for_generic_param (type->data.generic_param);
2291 default:
2292 /* At this point, we should've avoided all potential allocations in mono_class_from_mono_type () */
2293 return image == mono_class_from_mono_type (type)->image;
2294 }
2295 }
2296
2297 static inline void
2298 image_sets_lock (void)
2299 {
2300 mono_os_mutex_lock (&image_sets_mutex);
2301 }
2302
2303 static inline void
2304 image_sets_unlock (void)
2305 {
2306 mono_os_mutex_unlock (&image_sets_mutex);
2307 }
2308
2309 /*
2310 * get_image_set:
2311 *
2312 * Return a MonoImageSet representing the set of images in IMAGES.
2313 */
2314 static MonoImageSet*
2315 get_image_set (MonoImage **images, int nimages)
2316 {
2317 int i, j, k;
2318 MonoImageSet *set;
2319 GSList *l;
2320
2321 /* Common case: Image set contains corlib only. If we've seen that case before, we cached the set. */
2322 if (nimages == 1 && images [0] == mono_defaults.corlib && mscorlib_image_set)
2323 return mscorlib_image_set;
2324
2325 /* Happens with empty generic instances */
2326 // FIXME: Is corlib the correct thing to return here? If so, why? This may be an artifact of generic instances previously defaulting to allocating from corlib.
2327 if (nimages == 0)
2328 return mscorlib_image_set;
2329
2330 image_sets_lock ();
2331
2332 if (!image_sets)
2333 image_sets = g_ptr_array_new ();
2334
2335 // Before we go on, we should check to see whether a MonoImageSet with these images already exists.
2336 // We can search the referred-by imagesets of any one of our images to do this. Arbitrarily pick one here:
2337 if (images [0] == mono_defaults.corlib && nimages > 1)
2338 l = images [1]->image_sets; // Prefer not to search the imagesets of corlib-- that will be a long list.
2339 else
2340 l = images [0]->image_sets;
2341
2342 set = NULL;
2343 while (l) // Iterate over selected list, looking for an imageset with members equal to our target one
2344 {
2345 set = (MonoImageSet *)l->data;
2346
2347 if (set->nimages == nimages) { // Member count differs, this can't be it
2348 // Compare all members to all members-- order might be different
2349 for (j = 0; j < nimages; ++j) {
2350 for (k = 0; k < nimages; ++k)
2351 if (set->images [k] == images [j])
2352 break; // Break on match
2353
2354 // If we iterated all the way through set->images, images[j] was *not* found.
2355 if (k == nimages)
2356 break; // Break on "image not found"
2357 }
2358
2359 // If we iterated all the way through images without breaking, all items in images were found in set->images
2360 if (j == nimages)
2361 break; // Break on "found a set with equal members"
2362 }
2363
2364 l = l->next;
2365 }
2366
2367 // If we iterated all the way through l without breaking, the imageset does not already exist and we shuold create it
2368 if (!l) {
2369 set = g_new0 (MonoImageSet, 1);
2370 set->nimages = nimages;
2371 set->images = g_new0 (MonoImage*, nimages);
2372 mono_os_mutex_init_recursive (&set->lock);
2373 for (i = 0; i < nimages; ++i)
2374 set->images [i] = images [i];
2375 set->gclass_cache = g_hash_table_new_full (mono_generic_class_hash, mono_generic_class_equal, NULL, (GDestroyNotify)free_generic_class);
2376 set->ginst_cache = g_hash_table_new_full (mono_metadata_generic_inst_hash, mono_metadata_generic_inst_equal, NULL, (GDestroyNotify)free_generic_inst);
2377 set->gmethod_cache = g_hash_table_new_full (inflated_method_hash, inflated_method_equal, NULL, (GDestroyNotify)free_inflated_method);
2378 set->gsignature_cache = g_hash_table_new_full (inflated_signature_hash, inflated_signature_equal, NULL, (GDestroyNotify)free_inflated_signature);
2379
2380 for (i = 0; i < nimages; ++i)
2381 set->images [i]->image_sets = g_slist_prepend (set->images [i]->image_sets, set);
2382
2383 g_ptr_array_add (image_sets, set);
2384 }
2385
2386 if (nimages == 1 && images [0] == mono_defaults.corlib) {
2387 mono_memory_barrier ();
2388 mscorlib_image_set = set;
2389 }
2390
2391 image_sets_unlock ();
2392
2393 return set;
2394 }
2395
2396 static void
2397 delete_image_set (MonoImageSet *set)
2398 {
2399 int i;
2400
2401 g_hash_table_destroy (set->gclass_cache);
2402 g_hash_table_destroy (set->ginst_cache);
2403 g_hash_table_destroy (set->gmethod_cache);
2404 g_hash_table_destroy (set->gsignature_cache);
2405
2406 mono_wrapper_caches_free (&set->wrapper_caches);
2407
2408 image_sets_lock ();
2409
2410 for (i = 0; i < set->nimages; ++i)
2411 set->images [i]->image_sets = g_slist_remove (set->images [i]->image_sets, set);
2412
2413 g_ptr_array_remove (image_sets, set);
2414
2415 image_sets_unlock ();
2416
2417 if (set->mempool)
2418 mono_mempool_destroy (set->mempool);
2419 g_free (set->images);
2420 mono_os_mutex_destroy (&set->lock);
2421 g_free (set);
2422 }
2423
2424 void
2425 mono_image_set_lock (MonoImageSet *set)
2426 {
2427 mono_os_mutex_lock (&set->lock);
2428 }
2429
2430 void
2431 mono_image_set_unlock (MonoImageSet *set)
2432 {
2433 mono_os_mutex_unlock (&set->lock);
2434 }
2435
2436 gpointer
2437 mono_image_set_alloc (MonoImageSet *set, guint size)
2438 {
2439 gpointer res;
2440
2441 mono_image_set_lock (set);
2442 if (!set->mempool)
2443 set->mempool = mono_mempool_new_size (INITIAL_IMAGE_SET_SIZE);
2444 res = mono_mempool_alloc (set->mempool, size);
2445 mono_image_set_unlock (set);
2446
2447 return res;
2448 }
2449
2450 gpointer
2451 mono_image_set_alloc0 (MonoImageSet *set, guint size)
2452 {
2453 gpointer res;
2454
2455 mono_image_set_lock (set);
2456 if (!set->mempool)
2457 set->mempool = mono_mempool_new_size (INITIAL_IMAGE_SET_SIZE);
2458 res = mono_mempool_alloc0 (set->mempool, size);
2459 mono_image_set_unlock (set);
2460
2461 return res;
2462 }
2463
2464 char*
2465 mono_image_set_strdup (MonoImageSet *set, const char *s)
2466 {
2467 char *res;
2468
2469 mono_image_set_lock (set);
2470 if (!set->mempool)
2471 set->mempool = mono_mempool_new_size (INITIAL_IMAGE_SET_SIZE);
2472 res = mono_mempool_strdup (set->mempool, s);
2473 mono_image_set_unlock (set);
2474
2475 return res;
2476 }
2477
2478 // Get a descriptive string for a MonoImageSet
2479 // Callers are obligated to free buffer with g_free after use
2480 char *
2481 mono_image_set_description (MonoImageSet *set)
2482 {
2483 GString *result = g_string_new (NULL);
2484 int img;
2485 g_string_append (result, "[");
2486 for (img = 0; img < set->nimages; img++)
2487 {
2488 if (img > 0)
2489 g_string_append (result, ", ");
2490 g_string_append (result, set->images[img]->name);
2491 }
2492 g_string_append (result, "]");
2493 return g_string_free (result, FALSE);
2494 }
2495
2496 /*
2497 * Structure used by the collect_..._images functions to store the image list.
2498 */
2499 typedef struct {
2500 MonoImage *image_buf [64];
2501 MonoImage **images;
2502 int nimages, images_len;
2503 } CollectData;
2504
2505 static void
2506 collect_data_init (CollectData *data)
2507 {
2508 data->images = data->image_buf;
2509 data->images_len = 64;
2510 data->nimages = 0;
2511 }
2512
2513 static void
2514 collect_data_free (CollectData *data)
2515 {
2516 if (data->images != data->image_buf)
2517 g_free (data->images);
2518 }
2519
2520 static void
2521 enlarge_data (CollectData *data)
2522 {
2523 int new_len = data->images_len < 16 ? 16 : data->images_len * 2;
2524 MonoImage **d = g_new (MonoImage *, new_len);
2525
2526 // FIXME: test this
2527 g_assert_not_reached ();
2528 memcpy (d, data->images, data->images_len);
2529 if (data->images != data->image_buf)
2530 g_free (data->images);
2531 data->images = d;
2532 data->images_len = new_len;
2533 }
2534
2535 static inline void
2536 add_image (MonoImage *image, CollectData *data)
2537 {
2538 int i;
2539
2540 /* The arrays are small, so use a linear search instead of a hash table */
2541 for (i = 0; i < data->nimages; ++i)
2542 if (data->images [i] == image)
2543 return;
2544
2545 if (data->nimages == data->images_len)
2546 enlarge_data (data);
2547
2548 data->images [data->nimages ++] = image;
2549 }
2550
2551 static void
2552 collect_type_images (MonoType *type, CollectData *data);
2553
2554 static void
2555 collect_ginst_images (MonoGenericInst *ginst, CollectData *data)
2556 {
2557 int i;
2558
2559 for (i = 0; i < ginst->type_argc; ++i) {
2560 collect_type_images (ginst->type_argv [i], data);
2561 }
2562 }
2563
2564 static void
2565 collect_gclass_images (MonoGenericClass *gclass, CollectData *data)
2566 {
2567 add_image (gclass->container_class->image, data);
2568 if (gclass->context.class_inst)
2569 collect_ginst_images (gclass->context.class_inst, data);
2570 }
2571
2572 static void
2573 collect_signature_images (MonoMethodSignature *sig, CollectData *data)
2574 {
2575 gpointer iter = NULL;
2576 MonoType *p;
2577
2578 collect_type_images (mono_signature_get_return_type (sig), data);
2579 while ((p = mono_signature_get_params (sig, &iter)) != NULL)
2580 collect_type_images (p, data);
2581 }
2582
2583 static void
2584 collect_inflated_signature_images (MonoInflatedMethodSignature *sig, CollectData *data)
2585 {
2586 collect_signature_images (sig->sig, data);
2587 if (sig->context.class_inst)
2588 collect_ginst_images (sig->context.class_inst, data);
2589 if (sig->context.method_inst)
2590 collect_ginst_images (sig->context.method_inst, data);
2591 }
2592
2593 static void
2594 collect_method_images (MonoMethodInflated *method, CollectData *data)
2595 {
2596 MonoMethod *m = method->declaring;
2597
2598 add_image (method->declaring->klass->image, data);
2599 if (method->context.class_inst)
2600 collect_ginst_images (method->context.class_inst, data);
2601 if (method->context.method_inst)
2602 collect_ginst_images (method->context.method_inst, data);
2603 /*
2604 * Dynamic assemblies have no references, so the images they depend on can be unloaded before them.
2605 */
2606 if (image_is_dynamic (m->klass->image))
2607 collect_signature_images (mono_method_signature (m), data);
2608 }
2609
2610 static void
2611 collect_type_images (MonoType *type, CollectData *data)
2612 {
2613 retry:
2614 switch (type->type) {
2615 case MONO_TYPE_GENERICINST:
2616 collect_gclass_images (type->data.generic_class, data);
2617 break;
2618 case MONO_TYPE_PTR:
2619 type = type->data.type;
2620 goto retry;
2621 case MONO_TYPE_SZARRAY:
2622 type = &type->data.klass->byval_arg;
2623 goto retry;
2624 case MONO_TYPE_ARRAY:
2625 type = &type->data.array->eklass->byval_arg;
2626 goto retry;
2627 case MONO_TYPE_FNPTR:
2628 //return signature_in_image (type->data.method, image);
2629 g_assert_not_reached ();
2630 case MONO_TYPE_VAR:
2631 case MONO_TYPE_MVAR:
2632 {
2633 MonoImage *image = get_image_for_generic_param (type->data.generic_param);
2634 add_image (image, data);
2635 break;
2636 }
2637 case MONO_TYPE_CLASS:
2638 case MONO_TYPE_VALUETYPE:
2639 add_image (mono_class_from_mono_type (type)->image, data);
2640 break;
2641 default:
2642 add_image (mono_defaults.corlib, data);
2643 }
2644 }
2645
2646 typedef struct {
2647 MonoImage *image;
2648 GSList *list;
2649 } CleanForImageUserData;
2650
2651 static gboolean
2652 steal_gclass_in_image (gpointer key, gpointer value, gpointer data)
2653 {
2654 MonoGenericClass *gclass = (MonoGenericClass *)key;
2655 CleanForImageUserData *user_data = (CleanForImageUserData *)data;
2656
2657 g_assert (gclass_in_image (gclass, user_data->image));
2658
2659 user_data->list = g_slist_prepend (user_data->list, gclass);
2660 return TRUE;
2661 }
2662
2663 static gboolean
2664 steal_ginst_in_image (gpointer key, gpointer value, gpointer data)
2665 {
2666 MonoGenericInst *ginst = (MonoGenericInst *)key;
2667 CleanForImageUserData *user_data = (CleanForImageUserData *)data;
2668
2669 // This doesn't work during corlib compilation
2670 //g_assert (ginst_in_image (ginst, user_data->image));
2671
2672 user_data->list = g_slist_prepend (user_data->list, ginst);
2673 return TRUE;
2674 }
2675
2676 static gboolean
2677 inflated_method_in_image (gpointer key, gpointer value, gpointer data)
2678 {
2679 MonoImage *image = (MonoImage *)data;
2680 MonoMethodInflated *method = (MonoMethodInflated *)key;
2681
2682 // FIXME:
2683 // https://bugzilla.novell.com/show_bug.cgi?id=458168
2684 g_assert (method->declaring->klass->image == image ||
2685 (method->context.class_inst && ginst_in_image (method->context.class_inst, image)) ||
2686 (method->context.method_inst && ginst_in_image (method->context.method_inst, image)) || (((MonoMethod*)method)->signature && signature_in_image (mono_method_signature ((MonoMethod*)method), image)));
2687
2688 return TRUE;
2689 }
2690
2691 static gboolean
2692 inflated_signature_in_image (gpointer key, gpointer value, gpointer data)
2693 {
2694 MonoImage *image = (MonoImage *)data;
2695 MonoInflatedMethodSignature *sig = (MonoInflatedMethodSignature *)key;
2696
2697 return signature_in_image (sig->sig, image) ||
2698 (sig->context.class_inst && ginst_in_image (sig->context.class_inst, image)) ||
2699 (sig->context.method_inst && ginst_in_image (sig->context.method_inst, image));
2700 }
2701
2702 static void
2703 check_gmethod (gpointer key, gpointer value, gpointer data)
2704 {
2705 MonoMethodInflated *method = (MonoMethodInflated *)key;
2706 MonoImage *image = (MonoImage *)data;
2707
2708 if (method->context.class_inst)
2709 g_assert (!ginst_in_image (method->context.class_inst, image));
2710 if (method->context.method_inst)
2711 g_assert (!ginst_in_image (method->context.method_inst, image));
2712 if (((MonoMethod*)method)->signature)
2713 g_assert (!signature_in_image (mono_method_signature ((MonoMethod*)method), image));
2714 }
2715
2716 /*
2717 * check_image_sets:
2718 *
2719 * Run a consistency check on the image set data structures.
2720 */
2721 static G_GNUC_UNUSED void
2722 check_image_sets (MonoImage *image)
2723 {
2724 int i;
2725 GSList *l = image->image_sets;
2726
2727 if (!image_sets)
2728 return;
2729
2730 for (i = 0; i < image_sets->len; ++i) {
2731 MonoImageSet *set = (MonoImageSet *)g_ptr_array_index (image_sets, i);
2732
2733 if (!g_slist_find (l, set)) {
2734 g_hash_table_foreach (set->gmethod_cache, check_gmethod, image);
2735 }
2736 }
2737 }
2738
2739 void
2740 mono_metadata_clean_for_image (MonoImage *image)
2741 {
2742 CleanForImageUserData ginst_data, gclass_data;
2743 GSList *l, *set_list;
2744
2745 //check_image_sets (image);
2746
2747 /*
2748 * The data structures could reference each other so we delete them in two phases.
2749 * This is required because of the hashing functions in gclass/ginst_cache.
2750 */
2751 ginst_data.image = gclass_data.image = image;
2752 ginst_data.list = gclass_data.list = NULL;
2753
2754 /* Collect the items to delete */
2755 /* delete_image_set () modifies the lists so make a copy */
2756 for (l = image->image_sets; l; l = l->next) {
2757 MonoImageSet *set = (MonoImageSet *)l->data;
2758
2759 mono_image_set_lock (set);
2760 g_hash_table_foreach_steal (set->gclass_cache, steal_gclass_in_image, &gclass_data);
2761 g_hash_table_foreach_steal (set->ginst_cache, steal_ginst_in_image, &ginst_data);
2762 g_hash_table_foreach_remove (set->gmethod_cache, inflated_method_in_image, image);
2763 g_hash_table_foreach_remove (set->gsignature_cache, inflated_signature_in_image, image);
2764 mono_image_set_unlock (set);
2765 }
2766
2767 /* Delete the removed items */
2768 for (l = ginst_data.list; l; l = l->next)
2769 free_generic_inst ((MonoGenericInst *)l->data);
2770 for (l = gclass_data.list; l; l = l->next)
2771 free_generic_class ((MonoGenericClass *)l->data);
2772 g_slist_free (ginst_data.list);
2773 g_slist_free (gclass_data.list);
2774 /* delete_image_set () modifies the lists so make a copy */
2775 set_list = g_slist_copy (image->image_sets);
2776 for (l = set_list; l; l = l->next) {
2777 MonoImageSet *set = (MonoImageSet *)l->data;
2778
2779 delete_image_set (set);
2780 }
2781 g_slist_free (set_list);
2782 }
2783
2784 static void
2785 free_inflated_method (MonoMethodInflated *imethod)
2786 {
2787 MonoMethod *method = (MonoMethod*)imethod;
2788
2789 if (method->signature)
2790 mono_metadata_free_inflated_signature (method->signature);
2791
2792 g_free (method);
2793 }
2794
2795 static void
2796 free_generic_inst (MonoGenericInst *ginst)
2797 {
2798 int i;
2799
2800 /* The ginst itself is allocated from the image set mempool */
2801 for (i = 0; i < ginst->type_argc; ++i)
2802 mono_metadata_free_type (ginst->type_argv [i]);
2803 }
2804
2805 static void
2806 free_generic_class (MonoGenericClass *gclass)
2807 {
2808 /* The gclass itself is allocated from the image set mempool */
2809 if (gclass->is_dynamic)
2810 mono_reflection_free_dynamic_generic_class (gclass);
2811 if (gclass->cached_class && gclass->cached_class->interface_id)
2812 mono_unload_interface_id (gclass->cached_class);
2813 }
2814
2815 static void
2816 free_inflated_signature (MonoInflatedMethodSignature *sig)
2817 {
2818 mono_metadata_free_inflated_signature (sig->sig);
2819 g_free (sig);
2820 }
2821
2822 /*
2823 * mono_metadata_get_inflated_signature:
2824 *
2825 * Given an inflated signature and a generic context, return a canonical copy of the
2826 * signature. The returned signature might be equal to SIG or it might be a cached copy.
2827 */
2828 MonoMethodSignature *
2829 mono_metadata_get_inflated_signature (MonoMethodSignature *sig, MonoGenericContext *context)
2830 {
2831 MonoInflatedMethodSignature helper;
2832 MonoInflatedMethodSignature *res;
2833 CollectData data;
2834 MonoImageSet *set;
2835
2836 helper.sig = sig;
2837 helper.context.class_inst = context->class_inst;
2838 helper.context.method_inst = context->method_inst;
2839
2840 collect_data_init (&data);
2841
2842 collect_inflated_signature_images (&helper, &data);
2843
2844 set = get_image_set (data.images, data.nimages);
2845
2846 collect_data_free (&data);
2847
2848 mono_image_set_lock (set);
2849
2850 res = (MonoInflatedMethodSignature *)g_hash_table_lookup (set->gsignature_cache, &helper);
2851 if (!res) {
2852 res = g_new0 (MonoInflatedMethodSignature, 1);
2853 res->sig = sig;
2854 res->context.class_inst = context->class_inst;
2855 res->context.method_inst = context->method_inst;
2856 g_hash_table_insert (set->gsignature_cache, res, res);
2857 }
2858
2859 mono_image_set_unlock (set);
2860
2861 return res->sig;
2862 }
2863
2864 MonoImageSet *
2865 mono_metadata_get_image_set_for_method (MonoMethodInflated *method)
2866 {
2867 MonoImageSet *set;
2868 CollectData image_set_data;
2869
2870 collect_data_init (&image_set_data);
2871 collect_method_images (method, &image_set_data);
2872 set = get_image_set (image_set_data.images, image_set_data.nimages);
2873 collect_data_free (&image_set_data);
2874
2875 return set;
2876 }
2877
2878 /*
2879 * mono_metadata_get_generic_inst:
2880 *
2881 * Given a list of types, return a MonoGenericInst that represents that list.
2882 * The returned MonoGenericInst has its own copy of the list of types. The list
2883 * passed in the argument can be freed, modified or disposed of.
2884 *
2885 */
2886 MonoGenericInst *
2887 mono_metadata_get_generic_inst (int type_argc, MonoType **type_argv)
2888 {
2889 MonoGenericInst *ginst;
2890 gboolean is_open;
2891 int i;
2892 int size = MONO_SIZEOF_GENERIC_INST + type_argc * sizeof (MonoType *);
2893 CollectData data;
2894 MonoImageSet *set;
2895
2896 for (i = 0; i < type_argc; ++i)
2897 if (mono_class_is_open_constructed_type (type_argv [i]))
2898 break;
2899 is_open = (i < type_argc);
2900
2901 ginst = (MonoGenericInst *)g_alloca (size);
2902 memset (ginst, 0, sizeof (MonoGenericInst));
2903 ginst->is_open = is_open;
2904 ginst->type_argc = type_argc;
2905 memcpy (ginst->type_argv, type_argv, type_argc * sizeof (MonoType *));
2906
2907 collect_data_init (&data);
2908
2909 collect_ginst_images (ginst, &data);
2910
2911 set = get_image_set (data.images, data.nimages);
2912
2913 collect_data_free (&data);
2914
2915 mono_image_set_lock (set);
2916
2917 ginst = (MonoGenericInst *)g_hash_table_lookup (set->ginst_cache, ginst);
2918 if (!ginst) {
2919 ginst = (MonoGenericInst *)mono_image_set_alloc0 (set, size);
2920 #ifndef MONO_SMALL_CONFIG
2921 ginst->id = ++next_generic_inst_id;
2922 #endif
2923 ginst->is_open = is_open;
2924 ginst->type_argc = type_argc;
2925
2926 for (i = 0; i < type_argc; ++i)
2927 ginst->type_argv [i] = mono_metadata_type_dup (NULL, type_argv [i]);
2928
2929 g_hash_table_insert (set->ginst_cache, ginst, ginst);
2930 }
2931
2932 mono_image_set_unlock (set);
2933 return ginst;
2934 }
2935
2936 static gboolean
2937 mono_metadata_is_type_builder_generic_type_definition (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2938 {
2939 MonoGenericContainer *container = container_class->generic_container;
2940
2941 if (!is_dynamic || container_class->wastypebuilder || container->type_argc != inst->type_argc)
2942 return FALSE;
2943 return inst == container->context.class_inst;
2944 }
2945
2946 /*
2947 * mono_metadata_lookup_generic_class:
2948 *
2949 * Returns a MonoGenericClass with the given properties.
2950 *
2951 */
2952 MonoGenericClass *
2953 mono_metadata_lookup_generic_class (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2954 {
2955 MonoGenericClass *gclass;
2956 MonoGenericClass helper;
2957 gboolean is_tb_open = mono_metadata_is_type_builder_generic_type_definition (container_class, inst, is_dynamic);
2958 MonoImageSet *set;
2959 CollectData data;
2960
2961 memset (&helper, 0, sizeof(helper)); // act like g_new0
2962 helper.container_class = container_class;
2963 helper.context.class_inst = inst;
2964 helper.is_dynamic = is_dynamic; /* We use this in a hash lookup, which does not attempt to downcast the pointer */
2965 helper.is_tb_open = is_tb_open;
2966
2967 collect_data_init (&data);
2968
2969 collect_gclass_images (&helper, &data);
2970
2971 set = get_image_set (data.images, data.nimages);
2972
2973 collect_data_free (&data);
2974
2975 mono_image_set_lock (set);
2976
2977 gclass = (MonoGenericClass *)g_hash_table_lookup (set->gclass_cache, &helper);
2978
2979 /* A tripwire just to keep us honest */
2980 g_assert (!helper.cached_class);
2981
2982 if (gclass) {
2983 mono_image_set_unlock (set);
2984 return gclass;
2985 }
2986
2987 if (is_dynamic) {
2988 MonoDynamicGenericClass *dgclass = mono_image_set_new0 (set, MonoDynamicGenericClass, 1);
2989 gclass = &dgclass->generic_class;
2990 gclass->is_dynamic = 1;
2991 } else {
2992 gclass = mono_image_set_new0 (set, MonoGenericClass, 1);
2993 }
2994
2995 gclass->is_tb_open = is_tb_open;
2996 gclass->container_class = container_class;
2997 gclass->context.class_inst = inst;
2998 gclass->context.method_inst = NULL;
2999 gclass->owner = set;
3000 if (inst == container_class->generic_container->context.class_inst && !is_tb_open)
3001 gclass->cached_class = container_class;
3002
3003 g_hash_table_insert (set->gclass_cache, gclass, gclass);
3004
3005 mono_image_set_unlock (set);
3006
3007 return gclass;
3008 }
3009
3010 /*
3011 * mono_metadata_inflate_generic_inst:
3012 *
3013 * Instantiate the generic instance @ginst with the context @context.
3014 * Check @error for success.
3015 *
3016 */
3017 MonoGenericInst *
3018 mono_metadata_inflate_generic_inst (MonoGenericInst *ginst, MonoGenericContext *context, MonoError *error)
3019 {
3020 MonoType **type_argv;
3021 MonoGenericInst *nginst = NULL;
3022 int i, count = 0;
3023
3024 mono_error_init (error);
3025
3026 if (!ginst->is_open)
3027 return ginst;
3028
3029 type_argv = g_new0 (MonoType*, ginst->type_argc);
3030
3031 for (i = 0; i < ginst->type_argc; i++) {
3032 type_argv [i] = mono_class_inflate_generic_type_checked (ginst->type_argv [i], context, error);
3033 if (!mono_error_ok (error))
3034 goto cleanup;
3035 ++count;
3036 }
3037
3038 nginst = mono_metadata_get_generic_inst (ginst->type_argc, type_argv);
3039
3040 cleanup:
3041 for (i = 0; i < count; i++)
3042 mono_metadata_free_type (type_argv [i]);
3043 g_free (type_argv);
3044
3045 return nginst;
3046 }
3047
3048 MonoGenericInst *
3049 mono_metadata_parse_generic_inst (MonoImage *m, MonoGenericContainer *container,
3050 int count, const char *ptr, const char **rptr, MonoError *error)
3051 {
3052 MonoType **type_argv;
3053 MonoGenericInst *ginst;
3054 int i;
3055
3056 mono_error_init (error);
3057 type_argv = g_new0 (MonoType*, count);
3058
3059 for (i = 0; i < count; i++) {
3060 MonoType *t = mono_metadata_parse_type_checked (m, container, 0, FALSE, ptr, &ptr, error);
3061 if (!t) {
3062 g_free (type_argv);
3063 return NULL;
3064 }
3065 type_argv [i] = t;
3066 }
3067
3068 if (rptr)
3069 *rptr = ptr;
3070
3071 ginst = mono_metadata_get_generic_inst (count, type_argv);
3072
3073 g_free (type_argv);
3074
3075 return ginst;
3076 }
3077
3078 static gboolean
3079 do_mono_metadata_parse_generic_class (MonoType *type, MonoImage *m, MonoGenericContainer *container,
3080 const char *ptr, const char **rptr, MonoError *error)
3081 {
3082 MonoGenericInst *inst;
3083 MonoClass *gklass;
3084 MonoType *gtype;
3085 int count;
3086
3087 mono_error_init (error);
3088
3089 // XXX how about transient?
3090 gtype = mono_metadata_parse_type_checked (m, NULL, 0, FALSE, ptr, &ptr, error);
3091 if (gtype == NULL)
3092 return FALSE;
3093
3094 gklass = mono_class_from_mono_type (gtype);
3095 if (!gklass->generic_container) {
3096 mono_error_set_bad_image (error, m, "Generic instance with non-generic definition");
3097 return FALSE;
3098 }
3099
3100 count = mono_metadata_decode_value (ptr, &ptr);
3101 inst = mono_metadata_parse_generic_inst (m, container, count, ptr, &ptr, error);
3102 if (inst == NULL)
3103 return FALSE;
3104
3105 if (rptr)
3106 *rptr = ptr;
3107
3108 type->data.generic_class = mono_metadata_lookup_generic_class (gklass, inst, FALSE);
3109 return TRUE;
3110 }
3111
3112 /*
3113 * select_container:
3114 * @gc: The generic container to normalize
3115 * @type: The kind of generic parameters the resulting generic-container should contain
3116 */
3117
3118 static MonoGenericContainer *
3119 select_container (MonoGenericContainer *gc, MonoTypeEnum type)
3120 {
3121 gboolean is_var = (type == MONO_TYPE_VAR);
3122 if (!gc)
3123 return NULL;
3124
3125 g_assert (is_var || type == MONO_TYPE_MVAR);
3126
3127 if (is_var) {
3128 if (gc->is_method || gc->parent)
3129 /*
3130 * The current MonoGenericContainer is a generic method -> its `parent'
3131 * points to the containing class'es container.
3132 */
3133 return gc->parent;
3134 }
3135
3136 return gc;
3137 }
3138
3139 MonoGenericContainer *
3140 get_anonymous_container_for_image (MonoImage *image, gboolean is_mvar)
3141 {
3142 MonoGenericContainer **container_pointer;
3143 if (is_mvar)
3144 container_pointer = &image->anonymous_generic_method_container;
3145 else
3146 container_pointer = &image->anonymous_generic_class_container;
3147 MonoGenericContainer *result = *container_pointer;
3148
3149 // This container has never been created; make it now.
3150 if (!result)
3151 {
3152 // Note this is never deallocated anywhere-- it exists for the lifetime of the image it's allocated from
3153 result = (MonoGenericContainer *)mono_image_alloc0 (image, sizeof (MonoGenericContainer));
3154 result->owner.image = image;
3155 result->is_anonymous = TRUE;
3156 result->is_small_param = TRUE;
3157 result->is_method = is_mvar;
3158
3159 // If another thread already made a container, use that and leak this new one.
3160 // (Technically it would currently be safe to just assign instead of CASing.)
3161 MonoGenericContainer *exchange = (MonoGenericContainer *)InterlockedCompareExchangePointer ((volatile gpointer *)container_pointer, result, NULL);
3162 if (exchange)
3163 result = exchange;
3164 }
3165 return result;
3166 }
3167
3168 /*
3169 * mono_metadata_parse_generic_param:
3170 * @generic_container: Our MonoClass's or MonoMethod's MonoGenericContainer;
3171 * see mono_metadata_parse_type_checked() for details.
3172 * Internal routine to parse a generic type parameter.
3173 * LOCKING: Acquires the loader lock
3174 */
3175 static MonoGenericParam *
3176 mono_metadata_parse_generic_param (MonoImage *m, MonoGenericContainer *generic_container,
3177 MonoTypeEnum type, const char *ptr, const char **rptr, MonoError *error)
3178 {
3179 int index = mono_metadata_decode_value (ptr, &ptr);
3180 if (rptr)
3181 *rptr = ptr;
3182
3183 mono_error_init (error);
3184
3185 generic_container = select_container (generic_container, type);
3186 if (!generic_container) {
3187 gboolean is_mvar = FALSE;
3188 switch (type)
3189 {
3190 case MONO_TYPE_VAR:
3191 break;
3192 case MONO_TYPE_MVAR:
3193 is_mvar = TRUE;
3194 break;
3195 default:
3196 g_error ("Cerating generic param object with invalid MonoType"); // This is not a generic param
3197 }
3198
3199 /* Create dummy MonoGenericParam */
3200 MonoGenericParam *param;
3201
3202 param = (MonoGenericParam *)mono_image_alloc0 (m, sizeof (MonoGenericParam));
3203 param->num = index;
3204 param->owner = get_anonymous_container_for_image (m, is_mvar);
3205
3206 return param;
3207 }
3208
3209 if (index >= generic_container->type_argc) {
3210 mono_error_set_bad_image (error, m, "Invalid generic %s parameter index %d, max index is %d",
3211 generic_container->is_method ? "method" : "type",
3212 index, generic_container->type_argc);
3213 return NULL;
3214 }
3215
3216 //This can't return NULL
3217 return mono_generic_container_get_param (generic_container, index);
3218 }
3219
3220 /*
3221 * mono_metadata_get_shared_type:
3222 *
3223 * Return a shared instance of TYPE, if available, NULL otherwise.
3224 * Shared MonoType instances help save memory. Their contents should not be modified
3225 * by the caller. They do not need to be freed as their lifetime is bound by either
3226 * the lifetime of the runtime (builtin types), or the lifetime of the MonoClass
3227 * instance they are embedded in. If they are freed, they should be freed using
3228 * mono_metadata_free_type () instead of g_free ().
3229 */
3230 MonoType*
3231 mono_metadata_get_shared_type (MonoType *type)
3232 {
3233 MonoType *cached;
3234
3235 /* No need to use locking since nobody is modifying the hash table */
3236 if ((cached = (MonoType *)g_hash_table_lookup (type_cache, type)))
3237 return cached;
3238
3239 switch (type->type){
3240 case MONO_TYPE_CLASS:
3241 case MONO_TYPE_VALUETYPE:
3242 if (type == &type->data.klass->byval_arg)
3243 return type;
3244 if (type == &type->data.klass->this_arg)
3245 return type;
3246 break;
3247 default:
3248 break;
3249 }
3250
3251 return NULL;
3252 }
3253
3254 static gboolean
3255 compare_type_literals (MonoImage *image, int class_type, int type_type, MonoError *error)
3256 {
3257 mono_error_init (error);
3258
3259 /* byval_arg.type can be zero if we're decoding a type that references a class been loading.
3260 * See mcs/test/gtest-440. and #650936.
3261 * FIXME This better be moved to the metadata verifier as it can catch more cases.
3262 */
3263 if (!class_type)
3264 return TRUE;
3265 /* NET 1.1 assemblies might encode string and object in a denormalized way.
3266 * See #675464.
3267 */
3268 if (class_type == type_type)
3269 return TRUE;
3270
3271 if (type_type == MONO_TYPE_CLASS) {
3272 if (class_type == MONO_TYPE_STRING || class_type == MONO_TYPE_OBJECT)
3273 return TRUE;
3274 //XXX stringify this argument
3275 mono_error_set_bad_image (error, image, "Expected reference type but got type kind %d", class_type);
3276 return FALSE;
3277 }
3278
3279 g_assert (type_type == MONO_TYPE_VALUETYPE);
3280 switch (class_type) {
3281 case MONO_TYPE_BOOLEAN:
3282 case MONO_TYPE_CHAR:
3283 case MONO_TYPE_I1:
3284 case MONO_TYPE_U1:
3285 case MONO_TYPE_I2:
3286 case MONO_TYPE_U2:
3287 case MONO_TYPE_I4:
3288 case MONO_TYPE_U4:
3289 case MONO_TYPE_I8:
3290 case MONO_TYPE_U8:
3291 case MONO_TYPE_R4:
3292 case MONO_TYPE_R8:
3293 case MONO_TYPE_I:
3294 case MONO_TYPE_U:
3295 case MONO_TYPE_CLASS:
3296 return TRUE;
3297 default:
3298 //XXX stringify this argument
3299 mono_error_set_bad_image (error, image, "Expected value type but got type kind %d", class_type);
3300 return FALSE;
3301 }
3302 }
3303
3304 static gboolean
3305 verify_var_type_and_container (MonoImage *image, int var_type, MonoGenericContainer *container, MonoError *error)
3306 {
3307 mono_error_init (error);
3308 if (var_type == MONO_TYPE_MVAR) {
3309 if (!container->is_method) { //MVAR and a method container
3310 mono_error_set_bad_image (error, image, "MVAR parsed in a context without a method container");
3311 return FALSE;
3312 }
3313 } else {
3314 if (!(!container->is_method || //VAR and class container
3315 (container->is_method && container->parent))) { //VAR and method container with parent
3316 mono_error_set_bad_image (error, image, "VAR parsed in a context without a class container");
3317 return FALSE;
3318 }
3319 }
3320 return TRUE;
3321 }
3322
3323 /*
3324 * do_mono_metadata_parse_type:
3325 * @type: MonoType to be filled in with the return value
3326 * @m: image context
3327 * @generic_context: generics_context
3328 * @transient: whenever to allocate data from the heap
3329 * @ptr: pointer to the encoded type
3330 * @rptr: pointer where the end of the encoded type is saved
3331 *
3332 * Internal routine used to "fill" the contents of @type from an
3333 * allocated pointer. This is done this way to avoid doing too
3334 * many mini-allocations (particularly for the MonoFieldType which
3335 * most of the time is just a MonoType, but sometimes might be augmented).
3336 *
3337 * This routine is used by mono_metadata_parse_type and
3338 * mono_metadata_parse_field_type
3339 *
3340 * This extracts a Type as specified in Partition II (22.2.12)
3341 *
3342 * Returns: FALSE if the type could not be loaded
3343 */
3344 static gboolean
3345 do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
3346 gboolean transient, const char *ptr, const char **rptr, MonoError *error)
3347 {
3348 mono_error_init (error);
3349
3350 type->type = (MonoTypeEnum)mono_metadata_decode_value (ptr, &ptr);
3351
3352 switch (type->type){
3353 case MONO_TYPE_VOID:
3354 case MONO_TYPE_BOOLEAN:
3355 case MONO_TYPE_CHAR:
3356 case MONO_TYPE_I1:
3357 case MONO_TYPE_U1:
3358 case MONO_TYPE_I2:
3359 case MONO_TYPE_U2:
3360 case MONO_TYPE_I4:
3361 case MONO_TYPE_U4:
3362 case MONO_TYPE_I8:
3363 case MONO_TYPE_U8:
3364 case MONO_TYPE_R4:
3365 case MONO_TYPE_R8:
3366 case MONO_TYPE_I:
3367 case MONO_TYPE_U:
3368 case MONO_TYPE_STRING:
3369 case MONO_TYPE_OBJECT:
3370 case MONO_TYPE_TYPEDBYREF:
3371 break;
3372 case MONO_TYPE_VALUETYPE:
3373 case MONO_TYPE_CLASS: {
3374 guint32 token;
3375 MonoClass *klass;
3376 token = mono_metadata_parse_typedef_or_ref (m, ptr, &ptr);
3377 klass = mono_class_get_checked (m, token, error);
3378 type->data.klass = klass;
3379 if (!klass)
3380 return FALSE;
3381
3382 if (!compare_type_literals (m, klass->byval_arg.type, type->type, error))
3383 return FALSE;
3384
3385 break;
3386 }
3387 case MONO_TYPE_SZARRAY: {
3388 MonoType *etype = mono_metadata_parse_type_checked (m, container, 0, transient, ptr, &ptr, error);
3389 if (!etype)
3390 return FALSE;
3391
3392 type->data.klass = mono_class_from_mono_type (etype);
3393
3394 if (transient)
3395 mono_metadata_free_type (etype);
3396
3397 g_assert (type->data.klass); //This was previously a check for NULL, but mcfmt should never fail. It can return a borken MonoClass, but should return at least something.
3398 break;
3399 }
3400 case MONO_TYPE_PTR: {
3401 type->data.type = mono_metadata_parse_type_checked (m, container, 0, transient, ptr, &ptr, error);
3402 if (!type->data.type)
3403 return FALSE;
3404 break;
3405 }
3406 case MONO_TYPE_FNPTR: {
3407 type->data.method = mono_metadata_parse_method_signature_full (m, container, 0, ptr, &ptr, error);
3408 if (!type->data.method)
3409 return FALSE;
3410 break;
3411 }
3412 case MONO_TYPE_ARRAY: {
3413 type->data.array = mono_metadata_parse_array_internal (m, container, transient, ptr, &ptr, error);
3414 if (!type->data.array)
3415 return FALSE;
3416 break;
3417 }
3418 case MONO_TYPE_MVAR:
3419 case MONO_TYPE_VAR: {
3420 if (container && !verify_var_type_and_container (m, type->type, container, error))
3421 return FALSE;
3422
3423 type->data.generic_param = mono_metadata_parse_generic_param (m, container, type->type, ptr, &ptr, error);
3424 if (!type->data.generic_param)
3425 return FALSE;
3426
3427 break;
3428 }
3429 case MONO_TYPE_GENERICINST: {
3430 if (!do_mono_metadata_parse_generic_class (type, m, container, ptr, &ptr, error))
3431 return FALSE;
3432 break;
3433 }
3434 default:
3435 mono_error_set_bad_image (error, m, "type 0x%02x not handled in do_mono_metadata_parse_type on image %s", type->type, m->name);
3436 return FALSE;
3437 }
3438
3439 if (rptr)
3440 *rptr = ptr;
3441 return TRUE;
3442 }
3443
3444 /*
3445 * mono_metadata_free_type:
3446 * @type: type to free
3447 *
3448 * Free the memory allocated for type @type which is allocated on the heap.
3449 */
3450 void
3451 mono_metadata_free_type (MonoType *type)
3452 {
3453 if (type >= builtin_types && type < builtin_types + NBUILTIN_TYPES ())
3454 return;
3455
3456 switch (type->type){
3457 case MONO_TYPE_OBJECT:
3458 case MONO_TYPE_STRING:
3459 if (!type->data.klass)
3460 break;
3461 /* fall through */
3462 case MONO_TYPE_CLASS:
3463 case MONO_TYPE_VALUETYPE:
3464 if (type == &type->data.klass->byval_arg || type == &type->data.klass->this_arg)
3465 return;
3466 break;
3467 case MONO_TYPE_PTR:
3468 mono_metadata_free_type (type->data.type);
3469 break;
3470 case MONO_TYPE_FNPTR:
3471 mono_metadata_free_method_signature (type->data.method);
3472 break;
3473 case MONO_TYPE_ARRAY:
3474 mono_metadata_free_array (type->data.array);
3475 break;
3476 default:
3477 break;
3478 }
3479
3480 g_free (type);
3481 }
3482
3483 #if 0
3484 static void
3485 hex_dump (const char *buffer, int base, int count)
3486 {
3487 int show_header = 1;
3488 int i;
3489
3490 if (count < 0){
3491 count = -count;
3492 show_header = 0;
3493 }
3494
3495 for (i = 0; i < count; i++){
3496 if (show_header)
3497 if ((i % 16) == 0)
3498 printf ("\n0x%08x: ", (unsigned char) base + i);
3499
3500 printf ("%02x ", (unsigned char) (buffer [i]));
3501 }
3502 fflush (stdout);
3503 }
3504 #endif
3505
3506 /**
3507 * @ptr: Points to the beginning of the Section Data (25.3)
3508 */
3509 static MonoExceptionClause*
3510 parse_section_data (MonoImage *m, int *num_clauses, const unsigned char *ptr, MonoError *error)
3511 {
3512 unsigned char sect_data_flags;
3513 int is_fat;
3514 guint32 sect_data_len;
3515 MonoExceptionClause* clauses = NULL;
3516
3517 mono_error_init (error);
3518
3519 while (1) {
3520 /* align on 32-bit boundary */
3521 ptr = dword_align (ptr);
3522 sect_data_flags = *ptr;
3523 ptr++;
3524
3525 is_fat = sect_data_flags & METHOD_HEADER_SECTION_FAT_FORMAT;
3526 if (is_fat) {
3527 sect_data_len = (ptr [2] << 16) | (ptr [1] << 8) | ptr [0];
3528 ptr += 3;
3529 } else {
3530 sect_data_len = ptr [0];
3531 ++ptr;
3532 }
3533
3534 if (sect_data_flags & METHOD_HEADER_SECTION_EHTABLE) {
3535 const unsigned char *p = dword_align (ptr);
3536 int i;
3537 *num_clauses = is_fat ? sect_data_len / 24: sect_data_len / 12;
3538 /* we could just store a pointer if we don't need to byteswap */
3539 clauses = (MonoExceptionClause *)g_malloc0 (sizeof (MonoExceptionClause) * (*num_clauses));
3540 for (i = 0; i < *num_clauses; ++i) {
3541 MonoExceptionClause *ec = &clauses [i];
3542 guint32 tof_value;
3543 if (is_fat) {
3544 ec->flags = read32 (p);
3545 ec->try_offset = read32 (p + 4);
3546 ec->try_len = read32 (p + 8);
3547 ec->handler_offset = read32 (p + 12);
3548 ec->handler_len = read32 (p + 16);
3549 tof_value = read32 (p + 20);
3550 p += 24;
3551 } else {
3552 ec->flags = read16 (p);
3553 ec->try_offset = read16 (p + 2);
3554 ec->try_len = *(p + 4);
3555 ec->handler_offset = read16 (p + 5);
3556 ec->handler_len = *(p + 7);
3557 tof_value = read32 (p + 8);
3558 p += 12;
3559 }
3560 if (ec->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
3561 ec->data.filter_offset = tof_value;
3562 } else if (ec->flags == MONO_EXCEPTION_CLAUSE_NONE) {
3563 ec->data.catch_class = NULL;
3564 if (tof_value) {
3565 ec->data.catch_class = mono_class_get_checked (m, tof_value, error);
3566 if (!is_ok (error)) {
3567 g_free (clauses);
3568 return NULL;
3569 }
3570 }
3571 } else {
3572 ec->data.catch_class = NULL;
3573 }
3574 /* g_print ("try %d: %x %04x-%04x %04x\n", i, ec->flags, ec->try_offset, ec->try_offset+ec->try_len, ec->try_len); */
3575 }
3576
3577 }
3578 if (sect_data_flags & METHOD_HEADER_SECTION_MORE_SECTS)
3579 ptr += sect_data_len - 4; /* LAMESPEC: it seems the size includes the header */
3580 else
3581 return clauses;
3582 }
3583 }
3584
3585 /*
3586 * mono_method_get_header_summary:
3587 * @method: The method to get the header.
3588 * @summary: Where to store the header
3589 *
3590 *
3591 * Returns: TRUE if the header was properly decoded.
3592 */
3593 gboolean
3594 mono_method_get_header_summary (MonoMethod *method, MonoMethodHeaderSummary *summary)
3595 {
3596 int idx;
3597 guint32 rva;
3598 MonoImage* img;
3599 const char *ptr;
3600 unsigned char flags, format;
3601 guint16 fat_flags;
3602
3603 /*Only the GMD has a pointer to the metadata.*/
3604 while (method->is_inflated)
3605 method = ((MonoMethodInflated*)method)->declaring;
3606
3607 summary->code_size = 0;
3608 summary->has_clauses = FALSE;
3609
3610 /*FIXME extract this into a MACRO and share it with mono_method_get_header*/
3611 if ((method->flags & METHOD_ATTRIBUTE_ABSTRACT) || (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) || (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) || (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
3612 return FALSE;
3613
3614 if (method->wrapper_type != MONO_WRAPPER_NONE || method->sre_method) {
3615 MonoMethodHeader *header = ((MonoMethodWrapper *)method)->header;
3616 if (!header)
3617 return FALSE;
3618 summary->code_size = header->code_size;
3619 summary->has_clauses = header->num_clauses > 0;
3620 return TRUE;
3621 }
3622
3623
3624 idx = mono_metadata_token_index (method->token);
3625 img = method->klass->image;
3626 rva = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_RVA);
3627
3628 /*We must run the verifier since we'll be decoding it.*/
3629 if (!mono_verifier_verify_method_header (img, rva, NULL))
3630 return FALSE;
3631
3632 ptr = mono_image_rva_map (img, rva);
3633 if (!ptr)
3634 return FALSE;
3635
3636 flags = *(const unsigned char *)ptr;
3637 format = flags & METHOD_HEADER_FORMAT_MASK;
3638
3639 switch (format) {
3640 case METHOD_HEADER_TINY_FORMAT:
3641 ptr++;
3642 summary->code_size = flags >> 2;
3643 break;
3644 case METHOD_HEADER_FAT_FORMAT:
3645 fat_flags = read16 (ptr);
3646 ptr += 4;
3647 summary->code_size = read32 (ptr);
3648 if (fat_flags & METHOD_HEADER_MORE_SECTS)
3649 summary->has_clauses = TRUE;
3650 break;
3651 default:
3652 return FALSE;
3653 }
3654 return TRUE;
3655 }
3656
3657 /*
3658 * mono_metadata_parse_mh_full:
3659 * @m: metadata context
3660 * @generic_context: generics context
3661 * @ptr: pointer to the method header.
3662 *
3663 * Decode the method header at @ptr, including pointer to the IL code,
3664 * info about local variables and optional exception tables.
3665 * This is a Mono runtime internal function.
3666 *
3667 * LOCKING: Acquires the loader lock.
3668 *
3669 * Returns: a transient MonoMethodHeader allocated from the heap.
3670 */
3671 MonoMethodHeader *
3672 mono_metadata_parse_mh_full (MonoImage *m, MonoGenericContainer *container, const char *ptr, MonoError *error)
3673 {
3674 MonoMethodHeader *mh = NULL;
3675 unsigned char flags = *(const unsigned char *) ptr;
3676 unsigned char format = flags & METHOD_HEADER_FORMAT_MASK;
3677 guint16 fat_flags;
3678 guint32 local_var_sig_tok, max_stack, code_size, init_locals;
3679 const unsigned char *code;
3680 MonoExceptionClause* clauses = NULL;
3681 int num_clauses = 0;
3682 MonoTableInfo *t = &m->tables [MONO_TABLE_STANDALONESIG];
3683 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
3684
3685 mono_error_init (error);
3686
3687 if (!ptr) {
3688 mono_error_set_bad_image (error, m, "Method header with null pointer");
3689 return NULL;
3690 }
3691
3692 switch (format) {
3693 case METHOD_HEADER_TINY_FORMAT:
3694 mh = (MonoMethodHeader *)g_malloc0 (MONO_SIZEOF_METHOD_HEADER);
3695 ptr++;
3696 mh->max_stack = 8;
3697 mh->is_transient = TRUE;
3698 local_var_sig_tok = 0;
3699 mh->code_size = flags >> 2;
3700 mh->code = (unsigned char*)ptr;
3701 return mh;
3702 case METHOD_HEADER_FAT_FORMAT:
3703 fat_flags = read16 (ptr);
3704 ptr += 2;
3705 max_stack = read16 (ptr);
3706 ptr += 2;
3707 code_size = read32 (ptr);
3708 ptr += 4;
3709 local_var_sig_tok = read32 (ptr);
3710 ptr += 4;
3711
3712 if (fat_flags & METHOD_HEADER_INIT_LOCALS)
3713 init_locals = 1;
3714 else
3715 init_locals = 0;
3716
3717 code = (unsigned char*)ptr;
3718
3719 if (!(fat_flags & METHOD_HEADER_MORE_SECTS))
3720 break;
3721
3722 /*
3723 * There are more sections
3724 */
3725 ptr = (char*)code + code_size;
3726 break;
3727 default:
3728 mono_error_set_bad_image (error, m, "Invalid method header format %d", format);
3729 return NULL;
3730 }
3731
3732 if (local_var_sig_tok) {
3733 int idx = (local_var_sig_tok & 0xffffff)-1;
3734 if (idx >= t->rows || idx < 0) {
3735 mono_error_set_bad_image (error, m, "Invalid method header local vars signature token 0x%8x", idx);
3736 goto fail;
3737 }
3738 mono_metadata_decode_row (t, idx, cols, 1);
3739
3740 if (!mono_verifier_verify_standalone_signature (m, cols [MONO_STAND_ALONE_SIGNATURE], NULL)) {
3741 mono_error_set_bad_image (error, m, "Method header locals signature 0x%8x verification failed", idx);
3742 goto fail;
3743 }
3744 }
3745 if (fat_flags & METHOD_HEADER_MORE_SECTS) {
3746 clauses = parse_section_data (m, &num_clauses, (const unsigned char*)ptr, error);
3747 if (!is_ok (error))
3748 goto fail;
3749 }
3750 if (local_var_sig_tok) {
3751 const char *locals_ptr;
3752 int len=0, i;
3753
3754 locals_ptr = mono_metadata_blob_heap (m, cols [MONO_STAND_ALONE_SIGNATURE]);
3755 mono_metadata_decode_blob_size (locals_ptr, &locals_ptr);
3756 if (*locals_ptr != 0x07)
3757 g_warning ("wrong signature for locals blob");
3758 locals_ptr++;
3759 len = mono_metadata_decode_value (locals_ptr, &locals_ptr);
3760 mh = (MonoMethodHeader *)g_malloc0 (MONO_SIZEOF_METHOD_HEADER + len * sizeof (MonoType*) + num_clauses * sizeof (MonoExceptionClause));
3761 mh->num_locals = len;
3762 for (i = 0; i < len; ++i) {
3763 mh->locals [i] = mono_metadata_parse_type_internal (m, container, 0, TRUE, locals_ptr, &locals_ptr, error);
3764 if (!is_ok (error))
3765 goto fail;
3766 }
3767 } else {
3768 mh = (MonoMethodHeader *)g_malloc0 (MONO_SIZEOF_METHOD_HEADER + num_clauses * sizeof (MonoExceptionClause));
3769 }
3770 mh->code = code;
3771 mh->code_size = code_size;
3772 mh->max_stack = max_stack;
3773 mh->is_transient = TRUE;
3774 mh->init_locals = init_locals;
3775 if (clauses) {
3776 MonoExceptionClause* clausesp = (MonoExceptionClause*)&mh->locals [mh->num_locals];
3777 memcpy (clausesp, clauses, num_clauses * sizeof (MonoExceptionClause));
3778 g_free (clauses);
3779 mh->clauses = clausesp;
3780 mh->num_clauses = num_clauses;
3781 }
3782 return mh;
3783 fail:
3784 g_free (clauses);
3785 g_free (mh);
3786 return NULL;
3787
3788 }
3789
3790 /*
3791 * mono_metadata_parse_mh:
3792 * @generic_context: generics context
3793 * @ptr: pointer to the method header.
3794 *
3795 * Decode the method header at @ptr, including pointer to the IL code,
3796 * info about local variables and optional exception tables.
3797 *
3798 * Returns: a transient MonoMethodHeader allocated from the heap.
3799 */
3800 MonoMethodHeader *
3801 mono_metadata_parse_mh (MonoImage *m, const char *ptr)
3802 {
3803 MonoError error;
3804 MonoMethodHeader *header = mono_metadata_parse_mh_full (m, NULL, ptr, &error);
3805 mono_error_cleanup (&error);
3806 return header;
3807 }
3808
3809 /*
3810 * mono_metadata_free_mh:
3811 * @mh: a method header
3812 *
3813 * Free the memory allocated for the method header.
3814 */
3815 void
3816 mono_metadata_free_mh (MonoMethodHeader *mh)
3817 {
3818 int i;
3819
3820 /* If it is not transient it means it's part of a wrapper method,
3821 * or a SRE-generated method, so the lifetime in that case is
3822 * dictated by the method's own lifetime
3823 */
3824 if (mh->is_transient) {
3825 for (i = 0; i < mh->num_locals; ++i)
3826 mono_metadata_free_type (mh->locals [i]);
3827 g_free (mh);
3828 }
3829 }
3830
3831 /*
3832 * mono_method_header_get_code:
3833 * @header: a MonoMethodHeader pointer
3834 * @code_size: memory location for returning the code size
3835 * @max_stack: memory location for returning the max stack
3836 *
3837 * Method header accessor to retreive info about the IL code properties:
3838 * a pointer to the IL code itself, the size of the code and the max number
3839 * of stack slots used by the code.
3840 *
3841 * Returns: pointer to the IL code represented by the method header.
3842 */
3843 const unsigned char*
3844 mono_method_header_get_code (MonoMethodHeader *header, guint32* code_size, guint32* max_stack)
3845 {
3846 if (code_size)
3847 *code_size = header->code_size;
3848 if (max_stack)
3849 *max_stack = header->max_stack;
3850 return header->code;
3851 }
3852
3853 /*
3854 * mono_method_header_get_locals:
3855 * @header: a MonoMethodHeader pointer
3856 * @num_locals: memory location for returning the number of local variables
3857 * @init_locals: memory location for returning the init_locals flag
3858 *
3859 * Method header accessor to retreive info about the local variables:
3860 * an array of local types, the number of locals and whether the locals
3861 * are supposed to be initialized to 0 on method entry
3862 *
3863 * Returns: pointer to an array of types of the local variables
3864 */
3865 MonoType**
3866 mono_method_header_get_locals (MonoMethodHeader *header, guint32* num_locals, gboolean *init_locals)
3867 {
3868 if (num_locals)
3869 *num_locals = header->num_locals;
3870 if (init_locals)
3871 *init_locals = header->init_locals;
3872 return header->locals;
3873 }
3874
3875 /*
3876 * mono_method_header_get_num_clauses:
3877 * @header: a MonoMethodHeader pointer
3878 *
3879 * Method header accessor to retreive the number of exception clauses.
3880 *
3881 * Returns: the number of exception clauses present
3882 */
3883 int
3884 mono_method_header_get_num_clauses (MonoMethodHeader *header)
3885 {
3886 return header->num_clauses;
3887 }
3888
3889 /*
3890 * mono_method_header_get_clauses:
3891 * @header: a MonoMethodHeader pointer
3892 * @method: MonoMethod the header belongs to
3893 * @iter: pointer to a iterator
3894 * @clause: pointer to a MonoExceptionClause structure which will be filled with the info
3895 *
3896 * Get the info about the exception clauses in the method. Set *iter to NULL to
3897 * initiate the iteration, then call the method repeatedly until it returns FALSE.
3898 * At each iteration, the structure pointed to by clause if filled with the
3899 * exception clause information.
3900 *
3901 * Returns: TRUE if clause was filled with info, FALSE if there are no more exception
3902 * clauses.
3903 */
3904 int
3905 mono_method_header_get_clauses (MonoMethodHeader *header, MonoMethod *method, gpointer *iter, MonoExceptionClause *clause)
3906 {
3907 MonoExceptionClause *sc;
3908 /* later we'll be able to use this interface to parse the clause info on demand,
3909 * without allocating anything.
3910 */
3911 if (!iter || !header->num_clauses)
3912 return FALSE;
3913 if (!*iter) {
3914 *iter = sc = header->clauses;
3915 *clause = *sc;
3916 return TRUE;
3917 }
3918 sc = (MonoExceptionClause *)*iter;
3919 sc++;
3920 if (sc < header->clauses + header->num_clauses) {
3921 *iter = sc;
3922 *clause = *sc;
3923 return TRUE;
3924 }
3925 return FALSE;
3926 }
3927
3928 /**
3929 * mono_metadata_parse_field_type:
3930 * @m: metadata context to extract information from
3931 * @ptr: pointer to the field signature
3932 * @rptr: pointer updated to match the end of the decoded stream
3933 *
3934 * Parses the field signature, and returns the type information for it.
3935 *
3936 * Returns: The MonoType that was extracted from @ptr.
3937 */
3938 MonoType *
3939 mono_metadata_parse_field_type (MonoImage *m, short field_flags, const char *ptr, const char **rptr)
3940 {
3941 MonoError error;
3942 MonoType * type = mono_metadata_parse_type_internal (m, NULL, field_flags, FALSE, ptr, rptr, &error);
3943 mono_error_cleanup (&error);
3944 return type;
3945 }
3946
3947 /**
3948 * mono_metadata_parse_param:
3949 * @m: metadata context to extract information from
3950 * @ptr: pointer to the param signature
3951 * @rptr: pointer updated to match the end of the decoded stream
3952 *
3953 * Parses the param signature, and returns the type information for it.
3954 *
3955 * Returns: The MonoType that was extracted from @ptr.
3956 */
3957 MonoType *
3958 mono_metadata_parse_param (MonoImage *m, const char *ptr, const char **rptr)
3959 {
3960 MonoError error;
3961 MonoType * type = mono_metadata_parse_type_internal (m, NULL, 0, FALSE, ptr, rptr, &error);
3962 mono_error_cleanup (&error);
3963 return type;
3964 }
3965
3966 /*
3967 * mono_metadata_token_from_dor:
3968 * @dor_token: A TypeDefOrRef coded index
3969 *
3970 * dor_token is a TypeDefOrRef coded index: it contains either
3971 * a TypeDef, TypeRef or TypeSpec in the lower bits, and the upper
3972 * bits contain an index into the table.
3973 *
3974 * Returns: an expanded token
3975 */
3976 guint32
3977 mono_metadata_token_from_dor (guint32 dor_index)
3978 {
3979 guint32 table, idx;
3980
3981 table = dor_index & 0x03;
3982 idx = dor_index >> 2;
3983
3984 switch (table){
3985 case 0: /* TypeDef */
3986 return MONO_TOKEN_TYPE_DEF | idx;
3987 case 1: /* TypeRef */
3988 return MONO_TOKEN_TYPE_REF | idx;
3989 case 2: /* TypeSpec */
3990 return MONO_TOKEN_TYPE_SPEC | idx;
3991 default:
3992 g_assert_not_reached ();
3993 }
3994
3995 return 0;
3996 }
3997
3998 /*
3999 * We use this to pass context information to the row locator
4000 */
4001 typedef struct {
4002 int idx; /* The index that we are trying to locate */
4003 int col_idx; /* The index in the row where idx may be stored */
4004 MonoTableInfo *t; /* pointer to the table */
4005 guint32 result;
4006 } locator_t;
4007
4008 /*
4009 * How the row locator works.
4010 *
4011 * Table A
4012 * ___|___
4013 * ___|___ Table B
4014 * ___|___------> _______
4015 * ___|___ _______
4016 *
4017 * A column in the rows of table A references an index in table B.
4018 * For example A may be the TYPEDEF table and B the METHODDEF table.
4019 *
4020 * Given an index in table B we want to get the row in table A
4021 * where the column n references our index in B.
4022 *
4023 * In the locator_t structure:
4024 * t is table A
4025 * col_idx is the column number
4026 * index is the index in table B
4027 * result will be the index in table A
4028 *
4029 * Examples:
4030 * Table A Table B column (in table A)
4031 * TYPEDEF METHODDEF MONO_TYPEDEF_METHOD_LIST
4032 * TYPEDEF FIELD MONO_TYPEDEF_FIELD_LIST
4033 * PROPERTYMAP PROPERTY MONO_PROPERTY_MAP_PROPERTY_LIST
4034 * INTERFIMPL TYPEDEF MONO_INTERFACEIMPL_CLASS
4035 * METHODSEM PROPERTY ASSOCIATION (encoded index)
4036 *
4037 * Note that we still don't support encoded indexes.
4038 *
4039 */
4040 static int
4041 typedef_locator (const void *a, const void *b)
4042 {
4043 locator_t *loc = (locator_t *) a;
4044 const char *bb = (const char *) b;
4045 int typedef_index = (bb - loc->t->base) / loc->t->row_size;
4046 guint32 col, col_next;
4047
4048 col = mono_metadata_decode_row_col (loc->t, typedef_index, loc->col_idx);
4049
4050 if (loc->idx < col)
4051 return -1;
4052
4053 /*
4054 * Need to check that the next row is valid.
4055 */
4056 if (typedef_index + 1 < loc->t->rows) {
4057 col_next = mono_metadata_decode_row_col (loc->t, typedef_index + 1, loc->col_idx);
4058 if (loc->idx >= col_next)
4059 return 1;
4060
4061 if (col == col_next)
4062 return 1;
4063 }
4064
4065 loc->result = typedef_index;
4066
4067 return 0;
4068 }
4069
4070 static int
4071 table_locator (const void *a, const void *b)
4072 {
4073 locator_t *loc = (locator_t *) a;
4074 const char *bb = (const char *) b;
4075 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
4076 guint32 col;
4077
4078 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
4079
4080 if (loc->idx == col) {
4081 loc->result = table_index;
4082 return 0;
4083 }
4084 if (loc->idx < col)
4085 return -1;
4086 else
4087 return 1;
4088 }
4089
4090 static int
4091 declsec_locator (const void *a, const void *b)
4092 {
4093 locator_t *loc = (locator_t *) a;
4094 const char *bb = (const char *) b;
4095 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
4096 guint32 col;
4097
4098 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
4099
4100 if (loc->idx == col) {
4101 loc->result = table_index;
4102 return 0;
4103 }
4104 if (loc->idx < col)
4105 return -1;
4106 else
4107 return 1;
4108 }
4109
4110 /**
4111 * search_ptr_table:
4112 *
4113 * Return the 1-based row index in TABLE, which must be one of the *Ptr tables,
4114 * which contains IDX.
4115 */
4116 static guint32
4117 search_ptr_table (MonoImage *image, int table, int idx)
4118 {
4119 MonoTableInfo *ptrdef = &image->tables [table];
4120 int i;
4121
4122 /* Use a linear search to find our index in the table */
4123 for (i = 0; i < ptrdef->rows; i ++)
4124 /* All the Ptr tables have the same structure */
4125 if (mono_metadata_decode_row_col (ptrdef, i, 0) == idx)
4126 break;
4127
4128 if (i < ptrdef->rows)
4129 return i + 1;
4130 else
4131 return idx;
4132 }
4133
4134 /**
4135 * mono_metadata_typedef_from_field:
4136 * @meta: metadata context
4137 * @index: FieldDef token
4138 *
4139 * Returns: the 1-based index into the TypeDef table of the type that
4140 * declared the field described by @index, or 0 if not found.
4141 */
4142 guint32
4143 mono_metadata_typedef_from_field (MonoImage *meta, guint32 index)
4144 {
4145 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
4146 locator_t loc;
4147
4148 if (!tdef->base)
4149 return 0;
4150
4151 loc.idx = mono_metadata_token_index (index);
4152 loc.col_idx = MONO_TYPEDEF_FIELD_LIST;
4153 loc.t = tdef;
4154
4155 if (meta->uncompressed_metadata)
4156 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
4157
4158 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
4159 return 0;
4160
4161 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4162 return loc.result + 1;
4163 }
4164
4165 /*
4166 * mono_metadata_typedef_from_method:
4167 * @meta: metadata context
4168 * @index: MethodDef token
4169 *
4170 * Returns: the 1-based index into the TypeDef table of the type that
4171 * declared the method described by @index. 0 if not found.
4172 */
4173 guint32
4174 mono_metadata_typedef_from_method (MonoImage *meta, guint32 index)
4175 {
4176 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
4177 locator_t loc;
4178
4179 if (!tdef->base)
4180 return 0;
4181
4182 loc.idx = mono_metadata_token_index (index);
4183 loc.col_idx = MONO_TYPEDEF_METHOD_LIST;
4184 loc.t = tdef;
4185
4186 if (meta->uncompressed_metadata)
4187 loc.idx = search_ptr_table (meta, MONO_TABLE_METHOD_POINTER, loc.idx);
4188
4189 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
4190 return 0;
4191
4192 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4193 return loc.result + 1;
4194 }
4195
4196 /*
4197 * mono_metadata_interfaces_from_typedef_full:
4198 * @meta: metadata context
4199 * @index: typedef token
4200 * @interfaces: Out parameter used to store the interface array
4201 * @count: Out parameter used to store the number of interfaces
4202 * @heap_alloc_result: if TRUE the result array will be g_malloc'd
4203 * @context: The generic context
4204 *
4205 * The array of interfaces that the @index typedef token implements is returned in
4206 * @interfaces. The number of elements in the array is returned in @count.
4207 *
4208
4209 * Returns: TRUE on success, FALSE on failure.
4210 */
4211 gboolean
4212 mono_metadata_interfaces_from_typedef_full (MonoImage *meta, guint32 index, MonoClass ***interfaces, guint *count, gboolean heap_alloc_result, MonoGenericContext *context, MonoError *error)
4213 {
4214 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_INTERFACEIMPL];
4215 locator_t loc;
4216 guint32 start, pos;
4217 guint32 cols [MONO_INTERFACEIMPL_SIZE];
4218 MonoClass **result;
4219
4220 *interfaces = NULL;
4221 *count = 0;
4222
4223 mono_error_init (error);
4224
4225 if (!tdef->base)
4226 return TRUE;
4227
4228 loc.idx = mono_metadata_token_index (index);
4229 loc.col_idx = MONO_INTERFACEIMPL_CLASS;
4230 loc.t = tdef;
4231
4232 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4233 return TRUE;
4234
4235 start = loc.result;
4236 /*
4237 * We may end up in the middle of the rows...
4238 */
4239 while (start > 0) {
4240 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_INTERFACEIMPL_CLASS))
4241 start--;
4242 else
4243 break;
4244 }
4245 pos = start;
4246 while (pos < tdef->rows) {
4247 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
4248 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
4249 break;
4250 ++pos;
4251 }
4252
4253 if (heap_alloc_result)
4254 result = g_new0 (MonoClass*, pos - start);
4255 else
4256 result = (MonoClass **)mono_image_alloc0 (meta, sizeof (MonoClass*) * (pos - start));
4257
4258 pos = start;
4259 while (pos < tdef->rows) {
4260 MonoClass *iface;
4261
4262 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
4263 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
4264 break;
4265 iface = mono_class_get_and_inflate_typespec_checked (
4266 meta, mono_metadata_token_from_dor (cols [MONO_INTERFACEIMPL_INTERFACE]), context, error);
4267 if (iface == NULL)
4268 return FALSE;
4269 result [pos - start] = iface;
4270 ++pos;
4271 }
4272 *count = pos - start;
4273 *interfaces = result;
4274 return TRUE;
4275 }
4276
4277 /*
4278 * @meta: metadata context
4279 * @index: typedef token
4280 * @count: Out parameter used to store the number of interfaces
4281 *
4282 * The array of interfaces that the @index typedef token implements is returned in
4283 * @interfaces. The number of elements in the array is returned in @count. The returned
4284 * array is g_malloc'd and the caller must free it.
4285 *
4286 * LOCKING: Acquires the loader lock .
4287 *
4288 * Returns: the interface array on success, NULL on failure.
4289 */
4290
4291 MonoClass**
4292 mono_metadata_interfaces_from_typedef (MonoImage *meta, guint32 index, guint *count)
4293 {
4294 MonoError error;
4295 MonoClass **interfaces = NULL;
4296 gboolean rv;
4297
4298 rv = mono_metadata_interfaces_from_typedef_full (meta, index, &interfaces, count, TRUE, NULL, &error);
4299 g_assert (mono_error_ok (&error)); /* FIXME dont swallow the error */
4300 if (rv)
4301 return interfaces;
4302 else
4303 return NULL;
4304 }
4305
4306 /*
4307 * mono_metadata_nested_in_typedef:
4308 * @meta: metadata context
4309 * @index: typedef token
4310 *
4311 * Returns: the 1-based index into the TypeDef table of the type
4312 * where the type described by @index is nested.
4313 * Returns 0 if @index describes a non-nested type.
4314 */
4315 guint32
4316 mono_metadata_nested_in_typedef (MonoImage *meta, guint32 index)
4317 {
4318 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
4319 locator_t loc;
4320
4321 if (!tdef->base)
4322 return 0;
4323
4324 loc.idx = mono_metadata_token_index (index);
4325 loc.col_idx = MONO_NESTED_CLASS_NESTED;
4326 loc.t = tdef;
4327
4328 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4329 return 0;
4330
4331 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4332 return mono_metadata_decode_row_col (tdef, loc.result, MONO_NESTED_CLASS_ENCLOSING) | MONO_TOKEN_TYPE_DEF;
4333 }
4334
4335 /*
4336 * mono_metadata_nesting_typedef:
4337 * @meta: metadata context
4338 * @index: typedef token
4339 *
4340 * Returns: the 1-based index into the TypeDef table of the first type
4341 * that is nested inside the type described by @index. The search starts at
4342 * @start_index. returns 0 if no such type is found.
4343 */
4344 guint32
4345 mono_metadata_nesting_typedef (MonoImage *meta, guint32 index, guint32 start_index)
4346 {
4347 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
4348 guint32 start;
4349 guint32 class_index = mono_metadata_token_index (index);
4350
4351 if (!tdef->base)
4352 return 0;
4353
4354 start = start_index;
4355
4356 while (start <= tdef->rows) {
4357 if (class_index == mono_metadata_decode_row_col (tdef, start - 1, MONO_NESTED_CLASS_ENCLOSING))
4358 break;
4359 else
4360 start++;
4361 }
4362
4363 if (start > tdef->rows)
4364 return 0;
4365 else
4366 return start;
4367 }
4368
4369 /*
4370 * mono_metadata_packing_from_typedef:
4371 * @meta: metadata context
4372 * @index: token representing a type
4373 *
4374 * Returns: the info stored in the ClassLAyout table for the given typedef token
4375 * into the @packing and @size pointers.
4376 * Returns 0 if the info is not found.
4377 */
4378 guint32
4379 mono_metadata_packing_from_typedef (MonoImage *meta, guint32 index, guint32 *packing, guint32 *size)
4380 {
4381 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CLASSLAYOUT];
4382 locator_t loc;
4383 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
4384
4385 if (!tdef->base)
4386 return 0;
4387
4388 loc.idx = mono_metadata_token_index (index);
4389 loc.col_idx = MONO_CLASS_LAYOUT_PARENT;
4390 loc.t = tdef;
4391
4392 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4393 return 0;
4394
4395 mono_metadata_decode_row (tdef, loc.result, cols, MONO_CLASS_LAYOUT_SIZE);
4396 if (packing)
4397 *packing = cols [MONO_CLASS_LAYOUT_PACKING_SIZE];
4398 if (size)
4399 *size = cols [MONO_CLASS_LAYOUT_CLASS_SIZE];
4400
4401 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4402 return loc.result + 1;
4403 }
4404
4405 /*
4406 * mono_metadata_custom_attrs_from_index:
4407 * @meta: metadata context
4408 * @index: token representing the parent
4409 *
4410 * Returns: the 1-based index into the CustomAttribute table of the first
4411 * attribute which belongs to the metadata object described by @index.
4412 * Returns 0 if no such attribute is found.
4413 */
4414 guint32
4415 mono_metadata_custom_attrs_from_index (MonoImage *meta, guint32 index)
4416 {
4417 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CUSTOMATTRIBUTE];
4418 locator_t loc;
4419
4420 if (!tdef->base)
4421 return 0;
4422
4423 loc.idx = index;
4424 loc.col_idx = MONO_CUSTOM_ATTR_PARENT;
4425 loc.t = tdef;
4426
4427 /* FIXME: Index translation */
4428
4429 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4430 return 0;
4431
4432 /* Find the first entry by searching backwards */
4433 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_CUSTOM_ATTR_PARENT) == index))
4434 loc.result --;
4435
4436 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4437 return loc.result + 1;
4438 }
4439
4440 /*
4441 * mono_metadata_declsec_from_index:
4442 * @meta: metadata context
4443 * @index: token representing the parent
4444 *
4445 * Returns: the 0-based index into the DeclarativeSecurity table of the first
4446 * attribute which belongs to the metadata object described by @index.
4447 * Returns -1 if no such attribute is found.
4448 */
4449 guint32
4450 mono_metadata_declsec_from_index (MonoImage *meta, guint32 index)
4451 {
4452 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_DECLSECURITY];
4453 locator_t loc;
4454
4455 if (!tdef->base)
4456 return -1;
4457
4458 loc.idx = index;
4459 loc.col_idx = MONO_DECL_SECURITY_PARENT;
4460 loc.t = tdef;
4461
4462 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, declsec_locator))
4463 return -1;
4464
4465 /* Find the first entry by searching backwards */
4466 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_DECL_SECURITY_PARENT) == index))
4467 loc.result --;
4468
4469 return loc.result;
4470 }
4471
4472 /*
4473 * mono_metadata_localscope_from_methoddef:
4474 * @meta: metadata context
4475 * @index: methoddef index
4476 *
4477 * Returns: the 1-based index into the LocalScope table of the first
4478 * scope which belongs to the method described by @index.
4479 * Returns 0 if no such row is found.
4480 */
4481 guint32
4482 mono_metadata_localscope_from_methoddef (MonoImage *meta, guint32 index)
4483 {
4484 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_LOCALSCOPE];
4485 locator_t loc;
4486
4487 if (!tdef->base)
4488 return 0;
4489
4490 loc.idx = index;
4491 loc.col_idx = MONO_LOCALSCOPE_METHOD;
4492 loc.t = tdef;
4493
4494 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4495 return 0;
4496
4497 /* Find the first entry by searching backwards */
4498 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_LOCALSCOPE_METHOD) == index))
4499 loc.result --;
4500
4501 return loc.result + 1;
4502 }
4503
4504 #ifdef DEBUG
4505 static void
4506 mono_backtrace (int limit)
4507 {
4508 void *array[limit];
4509 char **names;
4510 int i;
4511 backtrace (array, limit);
4512 names = backtrace_symbols (array, limit);
4513 for (i =0; i < limit; ++i) {
4514 g_print ("\t%s\n", names [i]);
4515 }
4516 g_free (names);
4517 }
4518 #endif
4519
4520 static int i8_align;
4521
4522 /*
4523 * mono_type_set_alignment:
4524 *
4525 * Set the alignment used by runtime to layout fields etc. of type TYPE to ALIGN.
4526 * This should only be used in AOT mode since the resulting layout will not match the
4527 * host abi layout.
4528 */
4529 void
4530 mono_type_set_alignment (MonoTypeEnum type, int align)
4531 {
4532 /* Support only a few types whose alignment is abi dependent */
4533 switch (type) {
4534 case MONO_TYPE_I8:
4535 i8_align = align;
4536 break;
4537 default:
4538 g_assert_not_reached ();
4539 break;
4540 }
4541 }
4542
4543 /*
4544 * mono_type_size:
4545 * @t: the type to return the size of
4546 *
4547 * Returns: the number of bytes required to hold an instance of this
4548 * type in memory
4549 */
4550 int
4551 mono_type_size (MonoType *t, int *align)
4552 {
4553 MonoTypeEnum simple_type;
4554
4555 if (!t) {
4556 *align = 1;
4557 return 0;
4558 }
4559 if (t->byref) {
4560 *align = MONO_ABI_ALIGNOF (gpointer);
4561 return MONO_ABI_SIZEOF (gpointer);
4562 }
4563
4564 simple_type = t->type;
4565 again:
4566 switch (simple_type) {
4567 case MONO_TYPE_VOID:
4568 *align = 1;
4569 return 0;
4570 case MONO_TYPE_BOOLEAN:
4571 *align = MONO_ABI_ALIGNOF (gint8);
4572 return 1;
4573 case MONO_TYPE_I1:
4574 case MONO_TYPE_U1:
4575 *align = MONO_ABI_ALIGNOF (gint8);
4576 return 1;
4577 case MONO_TYPE_CHAR:
4578 case MONO_TYPE_I2:
4579 case MONO_TYPE_U2:
4580 *align = MONO_ABI_ALIGNOF (gint16);
4581 return 2;
4582 case MONO_TYPE_I4:
4583 case MONO_TYPE_U4:
4584 *align = MONO_ABI_ALIGNOF (gint32);
4585 return 4;
4586 case MONO_TYPE_R4:
4587 *align = MONO_ABI_ALIGNOF (float);
4588 return 4;
4589 case MONO_TYPE_I8:
4590 case MONO_TYPE_U8:
4591 *align = MONO_ABI_ALIGNOF (gint64);
4592 return 8;
4593 case MONO_TYPE_R8:
4594 *align = MONO_ABI_ALIGNOF (double);
4595 return 8;
4596 case MONO_TYPE_I:
4597 case MONO_TYPE_U:
4598 *align = MONO_ABI_ALIGNOF (gpointer);
4599 return MONO_ABI_SIZEOF (gpointer);
4600 case MONO_TYPE_VALUETYPE: {
4601 if (t->data.klass->enumtype)
4602 return mono_type_size (mono_class_enum_basetype (t->data.klass), align);
4603 else
4604 return mono_class_value_size (t->data.klass, (guint32*)align);
4605 }
4606 case MONO_TYPE_STRING:
4607 case MONO_TYPE_OBJECT:
4608 case MONO_TYPE_CLASS:
4609 case MONO_TYPE_SZARRAY:
4610 case MONO_TYPE_PTR:
4611 case MONO_TYPE_FNPTR:
4612 case MONO_TYPE_ARRAY:
4613 *align = MONO_ABI_ALIGNOF (gpointer);
4614 return MONO_ABI_SIZEOF (gpointer);
4615 case MONO_TYPE_TYPEDBYREF:
4616 return mono_class_value_size (mono_defaults.typed_reference_class, (guint32*)align);
4617 case MONO_TYPE_GENERICINST: {
4618 MonoGenericClass *gclass = t->data.generic_class;
4619 MonoClass *container_class = gclass->container_class;
4620
4621 // g_assert (!gclass->inst->is_open);
4622
4623 if (container_class->valuetype) {
4624 if (container_class->enumtype)
4625 return mono_type_size (mono_class_enum_basetype (container_class), align);
4626 else
4627 return mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
4628 } else {
4629 *align = MONO_ABI_ALIGNOF (gpointer);
4630 return MONO_ABI_SIZEOF (gpointer);
4631 }
4632 }
4633 case MONO_TYPE_VAR:
4634 case MONO_TYPE_MVAR:
4635 if (!t->data.generic_param->gshared_constraint || t->data.generic_param->gshared_constraint->type == MONO_TYPE_VALUETYPE) {
4636 *align = MONO_ABI_ALIGNOF (gpointer);
4637 return MONO_ABI_SIZEOF (gpointer);
4638 } else {
4639 /* The gparam can only match types given by gshared_constraint */
4640 return mono_type_size (t->data.generic_param->gshared_constraint, align);
4641 goto again;
4642 }
4643 default:
4644 g_error ("mono_type_size: type 0x%02x unknown", t->type);
4645 }
4646 return 0;
4647 }
4648
4649 /*
4650 * mono_type_stack_size:
4651 * @t: the type to return the size it uses on the stack
4652 *
4653 * Returns: the number of bytes required to hold an instance of this
4654 * type on the runtime stack
4655 */
4656 int
4657 mono_type_stack_size (MonoType *t, int *align)
4658 {
4659 return mono_type_stack_size_internal (t, align, FALSE);
4660 }
4661
4662 int
4663 mono_type_stack_size_internal (MonoType *t, int *align, gboolean allow_open)
4664 {
4665 int tmp;
4666 MonoTypeEnum simple_type;
4667 #if SIZEOF_VOID_P == SIZEOF_REGISTER
4668 int stack_slot_size = MONO_ABI_SIZEOF (gpointer);
4669 int stack_slot_align = MONO_ABI_ALIGNOF (gpointer);
4670 #elif SIZEOF_VOID_P < SIZEOF_REGISTER
4671 int stack_slot_size = SIZEOF_REGISTER;
4672 int stack_slot_align = SIZEOF_REGISTER;
4673 #endif
4674
4675 g_assert (t != NULL);
4676
4677 if (!align)
4678 align = &tmp;
4679
4680 if (t->byref) {
4681 *align = stack_slot_align;
4682 return stack_slot_size;
4683 }
4684
4685 simple_type = t->type;
4686 switch (simple_type) {
4687 case MONO_TYPE_BOOLEAN:
4688 case MONO_TYPE_CHAR:
4689 case MONO_TYPE_I1:
4690 case MONO_TYPE_U1:
4691 case MONO_TYPE_I2:
4692 case MONO_TYPE_U2:
4693 case MONO_TYPE_I4:
4694 case MONO_TYPE_U4:
4695 case MONO_TYPE_I:
4696 case MONO_TYPE_U:
4697 case MONO_TYPE_STRING:
4698 case MONO_TYPE_OBJECT:
4699 case MONO_TYPE_CLASS:
4700 case MONO_TYPE_SZARRAY:
4701 case MONO_TYPE_PTR:
4702 case MONO_TYPE_FNPTR:
4703 case MONO_TYPE_ARRAY:
4704 *align = stack_slot_align;
4705 return stack_slot_size;
4706 case MONO_TYPE_VAR:
4707 case MONO_TYPE_MVAR:
4708 g_assert (allow_open);
4709 if (!t->data.generic_param->gshared_constraint || t->data.generic_param->gshared_constraint->type == MONO_TYPE_VALUETYPE) {
4710 *align = stack_slot_align;
4711 return stack_slot_size;
4712 } else {
4713 /* The gparam can only match types given by gshared_constraint */
4714 return mono_type_stack_size_internal (t->data.generic_param->gshared_constraint, align, allow_open);
4715 }
4716 case MONO_TYPE_TYPEDBYREF:
4717 *align = stack_slot_align;
4718 return stack_slot_size * 3;
4719 case MONO_TYPE_R4:
4720 *align = MONO_ABI_ALIGNOF (float);
4721 return sizeof (float);
4722 case MONO_TYPE_I8:
4723 case MONO_TYPE_U8:
4724 *align = MONO_ABI_ALIGNOF (gint64);
4725 return sizeof (gint64);
4726 case MONO_TYPE_R8:
4727 *align = MONO_ABI_ALIGNOF (double);
4728 return sizeof (double);
4729 case MONO_TYPE_VALUETYPE: {
4730 guint32 size;
4731
4732 if (t->data.klass->enumtype)
4733 return mono_type_stack_size_internal (mono_class_enum_basetype (t->data.klass), align, allow_open);
4734 else {
4735 size = mono_class_value_size (t->data.klass, (guint32*)align);
4736
4737 *align = *align + stack_slot_align - 1;
4738 *align &= ~(stack_slot_align - 1);
4739
4740 size += stack_slot_size - 1;
4741 size &= ~(stack_slot_size - 1);
4742
4743 return size;
4744 }
4745 }
4746 case MONO_TYPE_GENERICINST: {
4747 MonoGenericClass *gclass = t->data.generic_class;
4748 MonoClass *container_class = gclass->container_class;
4749
4750 if (!allow_open)
4751 g_assert (!gclass->context.class_inst->is_open);
4752
4753 if (container_class->valuetype) {
4754 if (container_class->enumtype)
4755 return mono_type_stack_size_internal (mono_class_enum_basetype (container_class), align, allow_open);
4756 else {
4757 guint32 size = mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
4758
4759 *align = *align + stack_slot_align - 1;
4760 *align &= ~(stack_slot_align - 1);
4761
4762 size += stack_slot_size - 1;
4763 size &= ~(stack_slot_size - 1);
4764
4765 return size;
4766 }
4767 } else {
4768 *align = stack_slot_align;
4769 return stack_slot_size;
4770 }
4771 }
4772 default:
4773 g_error ("type 0x%02x unknown", t->type);
4774 }
4775 return 0;
4776 }
4777
4778 gboolean
4779 mono_type_generic_inst_is_valuetype (MonoType *type)
4780 {
4781 g_assert (type->type == MONO_TYPE_GENERICINST);
4782 return type->data.generic_class->container_class->valuetype;
4783 }
4784
4785 gboolean
4786 mono_metadata_generic_class_is_valuetype (MonoGenericClass *gclass)
4787 {
4788 return gclass->container_class->valuetype;
4789 }
4790
4791 static gboolean
4792 _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2, gboolean signature_only)
4793 {
4794 MonoGenericInst *i1 = g1->context.class_inst;
4795 MonoGenericInst *i2 = g2->context.class_inst;
4796
4797 if (g1->is_dynamic != g2->is_dynamic)
4798 return FALSE;
4799 if (!mono_metadata_class_equal (g1->container_class, g2->container_class, signature_only))
4800 return FALSE;
4801 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
4802 return FALSE;
4803 return g1->is_tb_open == g2->is_tb_open;
4804 }
4805
4806 static gboolean
4807 _mono_metadata_generic_class_container_equal (const MonoGenericClass *g1, MonoClass *c2, gboolean signature_only)
4808 {
4809 MonoGenericInst *i1 = g1->context.class_inst;
4810 MonoGenericInst *i2 = c2->generic_container->context.class_inst;
4811
4812 if (!mono_metadata_class_equal (g1->container_class, c2, signature_only))
4813 return FALSE;
4814 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
4815 return FALSE;
4816 return !g1->is_tb_open;
4817 }
4818
4819 guint
4820 mono_metadata_generic_context_hash (const MonoGenericContext *context)
4821 {
4822 /* FIXME: check if this seed is good enough */
4823 guint hash = 0xc01dfee7;
4824 if (context->class_inst)
4825 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->class_inst);
4826 if (context->method_inst)
4827 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->method_inst);
4828 return hash;
4829 }
4830
4831 gboolean
4832 mono_metadata_generic_context_equal (const MonoGenericContext *g1, const MonoGenericContext *g2)
4833 {
4834 return g1->class_inst == g2->class_inst && g1->method_inst == g2->method_inst;
4835 }
4836
4837 /*
4838 * mono_metadata_str_hash:
4839 *
4840 * This should be used instead of g_str_hash for computing hash codes visible
4841 * outside this module, since g_str_hash () is not guaranteed to be stable
4842 * (its not the same in eglib for example).
4843 */
4844 guint
4845 mono_metadata_str_hash (gconstpointer v1)
4846 {
4847 /* Same as g_str_hash () in glib */
4848 char *p = (char *) v1;
4849 guint hash = *p;
4850
4851 while (*p++) {
4852 if (*p)
4853 hash = (hash << 5) - hash + *p;
4854 }
4855
4856 return hash;
4857 }
4858
4859 /*
4860 * mono_metadata_type_hash:
4861 * @t1: a type
4862 *
4863 * Computes an hash value for @t1 to be used in GHashTable.
4864 * The returned hash is guaranteed to be the same across executions.
4865 */
4866 guint
4867 mono_metadata_type_hash (MonoType *t1)
4868 {
4869 guint hash = t1->type;
4870
4871 hash |= t1->byref << 6; /* do not collide with t1->type values */
4872 switch (t1->type) {
4873 case MONO_TYPE_VALUETYPE:
4874 case MONO_TYPE_CLASS:
4875 case MONO_TYPE_SZARRAY: {
4876 MonoClass *klass = t1->data.klass;
4877 /*
4878 * Dynamic classes must not be hashed on their type since it can change
4879 * during runtime. For example, if we hash a reference type that is
4880 * later made into a valuetype.
4881 *
4882 * This is specially problematic with generic instances since they are
4883 * inserted in a bunch of hash tables before been finished.
4884 */
4885 if (image_is_dynamic (klass->image))
4886 return (t1->byref << 6) | mono_metadata_str_hash (klass->name);
4887 return ((hash << 5) - hash) ^ mono_metadata_str_hash (klass->name);
4888 }
4889 case MONO_TYPE_PTR:
4890 return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
4891 case MONO_TYPE_ARRAY:
4892 return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
4893 case MONO_TYPE_GENERICINST:
4894 return ((hash << 5) - hash) ^ mono_generic_class_hash (t1->data.generic_class);
4895 case MONO_TYPE_VAR:
4896 case MONO_TYPE_MVAR:
4897 return ((hash << 5) - hash) ^ mono_metadata_generic_param_hash (t1->data.generic_param);
4898 default:
4899 return hash;
4900 }
4901 }
4902
4903 guint
4904 mono_metadata_generic_param_hash (MonoGenericParam *p)
4905 {
4906 guint hash;
4907 MonoGenericParamInfo *info;
4908
4909 hash = (mono_generic_param_num (p) << 2);
4910 if (p->gshared_constraint)
4911 hash = ((hash << 5) - hash) ^ mono_metadata_type_hash (p->gshared_constraint);
4912 info = mono_generic_param_info (p);
4913 /* Can't hash on the owner klass/method, since those might not be set when this is called */
4914 if (info)
4915 hash = ((hash << 5) - hash) ^ info->token;
4916 return hash;
4917 }
4918
4919 static gboolean
4920 mono_metadata_generic_param_equal_internal (MonoGenericParam *p1, MonoGenericParam *p2, gboolean signature_only)
4921 {
4922 if (p1 == p2)
4923 return TRUE;
4924 if (mono_generic_param_num (p1) != mono_generic_param_num (p2))
4925 return FALSE;
4926 if (p1->gshared_constraint && p2->gshared_constraint) {
4927 if (!mono_metadata_type_equal (p1->gshared_constraint, p2->gshared_constraint))
4928 return FALSE;
4929 } else {
4930 if (p1->gshared_constraint != p2->gshared_constraint)
4931 return FALSE;
4932 }
4933
4934 /*
4935 * We have to compare the image as well because if we didn't,
4936 * the generic_inst_cache lookup wouldn't care about the image
4937 * of generic params, so what could happen is that a generic
4938 * inst with params from image A is put into the cache, then
4939 * image B gets that generic inst from the cache, image A is
4940 * unloaded, so the inst is deleted, but image B still retains
4941 * a pointer to it.
4942 */
4943 if (mono_generic_param_owner (p1) == mono_generic_param_owner (p2))
4944 return TRUE;
4945
4946 /*
4947 * If `signature_only' is true, we're comparing two (method) signatures.
4948 * In this case, the owner of two type parameters doesn't need to match.
4949 */
4950
4951 return signature_only;
4952 }
4953
4954 gboolean
4955 mono_metadata_generic_param_equal (MonoGenericParam *p1, MonoGenericParam *p2)
4956 {
4957 return mono_metadata_generic_param_equal_internal (p1, p2, TRUE);
4958 }
4959
4960 static gboolean
4961 mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only)
4962 {
4963 if (c1 == c2)
4964 return TRUE;
4965 if (c1->generic_class && c2->generic_class)
4966 return _mono_metadata_generic_class_equal (c1->generic_class, c2->generic_class, signature_only);
4967 if (c1->generic_class && c2->generic_container)
4968 return _mono_metadata_generic_class_container_equal (c1->generic_class, c2, signature_only);
4969 if (c1->generic_container && c2->generic_class)
4970 return _mono_metadata_generic_class_container_equal (c2->generic_class, c1, signature_only);
4971 if ((c1->byval_arg.type == MONO_TYPE_VAR) && (c2->byval_arg.type == MONO_TYPE_VAR))
4972 return mono_metadata_generic_param_equal_internal (
4973 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4974 if ((c1->byval_arg.type == MONO_TYPE_MVAR) && (c2->byval_arg.type == MONO_TYPE_MVAR))
4975 return mono_metadata_generic_param_equal_internal (
4976 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4977 if (signature_only &&
4978 (c1->byval_arg.type == MONO_TYPE_SZARRAY) && (c2->byval_arg.type == MONO_TYPE_SZARRAY))
4979 return mono_metadata_class_equal (c1->byval_arg.data.klass, c2->byval_arg.data.klass, signature_only);
4980 if (signature_only &&
4981 (c1->byval_arg.type == MONO_TYPE_ARRAY) && (c2->byval_arg.type == MONO_TYPE_ARRAY))
4982 return do_mono_metadata_type_equal (&c1->byval_arg, &c2->byval_arg, signature_only);
4983 return FALSE;
4984 }
4985
4986 static gboolean
4987 mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only)
4988 {
4989 gpointer iter1 = 0, iter2 = 0;
4990
4991 if (s1 == s2)
4992 return TRUE;
4993 if (s1->call_convention != s2->call_convention)
4994 return FALSE;
4995 if (s1->sentinelpos != s2->sentinelpos)
4996 return FALSE;
4997 if (s1->hasthis != s2->hasthis)
4998 return FALSE;
4999 if (s1->explicit_this != s2->explicit_this)
5000 return FALSE;
5001 if (! do_mono_metadata_type_equal (s1->ret, s2->ret, signature_only))
5002 return FALSE;
5003 if (s1->param_count != s2->param_count)
5004 return FALSE;
5005
5006 while (TRUE) {
5007 MonoType *t1 = mono_signature_get_params (s1, &iter1);
5008 MonoType *t2 = mono_signature_get_params (s2, &iter2);
5009
5010 if (t1 == NULL || t2 == NULL)
5011 return (t1 == t2);
5012 if (! do_mono_metadata_type_equal (t1, t2, signature_only))
5013 return FALSE;
5014 }
5015 }
5016
5017 /*
5018 * mono_metadata_type_equal:
5019 * @t1: a type
5020 * @t2: another type
5021 * @signature_only: If true, treat ginsts as equal which are instantiated separately but have equal positional value
5022 *
5023 * Determine if @t1 and @t2 represent the same type.
5024 * Returns: #TRUE if @t1 and @t2 are equal.
5025 */
5026 static gboolean
5027 do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only)
5028 {
5029 if (t1->type != t2->type || t1->byref != t2->byref)
5030 return FALSE;
5031
5032 switch (t1->type) {
5033 case MONO_TYPE_VOID:
5034 case MONO_TYPE_BOOLEAN:
5035 case MONO_TYPE_CHAR:
5036 case MONO_TYPE_I1:
5037 case MONO_TYPE_U1:
5038 case MONO_TYPE_I2:
5039 case MONO_TYPE_U2:
5040 case MONO_TYPE_I4:
5041 case MONO_TYPE_U4:
5042 case MONO_TYPE_I8:
5043 case MONO_TYPE_U8:
5044 case MONO_TYPE_R4:
5045 case MONO_TYPE_R8:
5046 case MONO_TYPE_STRING:
5047 case MONO_TYPE_I:
5048 case MONO_TYPE_U:
5049 case MONO_TYPE_OBJECT:
5050 case MONO_TYPE_TYPEDBYREF:
5051 return TRUE;
5052 case MONO_TYPE_VALUETYPE:
5053 case MONO_TYPE_CLASS:
5054 case MONO_TYPE_SZARRAY:
5055 return mono_metadata_class_equal (t1->data.klass, t2->data.klass, signature_only);
5056 case MONO_TYPE_PTR:
5057 return do_mono_metadata_type_equal (t1->data.type, t2->data.type, signature_only);
5058 case MONO_TYPE_ARRAY:
5059 if (t1->data.array->rank != t2->data.array->rank)
5060 return FALSE;
5061 return mono_metadata_class_equal (t1->data.array->eklass, t2->data.array->eklass, signature_only);
5062 case MONO_TYPE_GENERICINST:
5063 return _mono_metadata_generic_class_equal (
5064 t1->data.generic_class, t2->data.generic_class, signature_only);
5065 case MONO_TYPE_VAR:
5066 return mono_metadata_generic_param_equal_internal (
5067 t1->data.generic_param, t2->data.generic_param, signature_only);
5068 case MONO_TYPE_MVAR:
5069 return mono_metadata_generic_param_equal_internal (
5070 t1->data.generic_param, t2->data.generic_param, signature_only);
5071 case MONO_TYPE_FNPTR:
5072 return mono_metadata_fnptr_equal (t1->data.method, t2->data.method, signature_only);
5073 default:
5074 g_error ("implement type compare for %0x!", t1->type);
5075 return FALSE;
5076 }
5077
5078 return FALSE;
5079 }
5080
5081 gboolean
5082 mono_metadata_type_equal (MonoType *t1, MonoType *t2)
5083 {
5084 return do_mono_metadata_type_equal (t1, t2, FALSE);
5085 }
5086
5087 /**
5088 * mono_metadata_type_equal_full:
5089 * @t1: a type
5090 * @t2: another type
5091 * @signature_only: if signature only comparison should be made
5092 *
5093 * Determine if @t1 and @t2 are signature compatible if @signature_only is #TRUE, otherwise
5094 * behaves the same way as mono_metadata_type_equal.
5095 * The function mono_metadata_type_equal(a, b) is just a shortcut for mono_metadata_type_equal_full(a, b, FALSE).
5096 * Returns: #TRUE if @t1 and @t2 are equal taking @signature_only into account.
5097 */
5098 gboolean
5099 mono_metadata_type_equal_full (MonoType *t1, MonoType *t2, gboolean signature_only)
5100 {
5101 return do_mono_metadata_type_equal (t1, t2, signature_only);
5102 }
5103
5104 /**
5105 * mono_metadata_signature_equal:
5106 * @sig1: a signature
5107 * @sig2: another signature
5108 *
5109 * Determine if @sig1 and @sig2 represent the same signature, with the
5110 * same number of arguments and the same types.
5111 * Returns: #TRUE if @sig1 and @sig2 are equal.
5112 */
5113 gboolean
5114 mono_metadata_signature_equal (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
5115 {
5116 int i;
5117
5118 if (sig1->hasthis != sig2->hasthis || sig1->param_count != sig2->param_count)
5119 return FALSE;
5120
5121 if (sig1->generic_param_count != sig2->generic_param_count)
5122 return FALSE;
5123
5124 /*
5125 * We're just comparing the signatures of two methods here:
5126 *
5127 * If we have two generic methods `void Foo<U> (U u)' and `void Bar<V> (V v)',
5128 * U and V are equal here.
5129 *
5130 * That's what the `signature_only' argument of do_mono_metadata_type_equal() is for.
5131 */
5132
5133 for (i = 0; i < sig1->param_count; i++) {
5134 MonoType *p1 = sig1->params[i];
5135 MonoType *p2 = sig2->params[i];
5136
5137 /* if (p1->attrs != p2->attrs)
5138 return FALSE;
5139 */
5140 if (!do_mono_metadata_type_equal (p1, p2, TRUE))
5141 return FALSE;
5142 }
5143
5144 if (!do_mono_metadata_type_equal (sig1->ret, sig2->ret, TRUE))
5145 return FALSE;
5146 return TRUE;
5147 }
5148
5149 /**
5150 * mono_metadata_type_dup:
5151 * @image: image to alloc memory from
5152 * @original: type to duplicate
5153 *
5154 * Returns: copy of type allocated from the image's mempool (or from the heap, if @image is null).
5155 */
5156 MonoType *
5157 mono_metadata_type_dup (MonoImage *image, const MonoType *o)
5158 {
5159 MonoType *r = NULL;
5160 int sizeof_o = MONO_SIZEOF_TYPE;
5161 if (o->num_mods)
5162 sizeof_o += o->num_mods * sizeof (MonoCustomMod);
5163
5164 r = image ? (MonoType *)mono_image_alloc0 (image, sizeof_o) : (MonoType *)g_malloc (sizeof_o);
5165
5166 memcpy (r, o, sizeof_o);
5167
5168 if (o->type == MONO_TYPE_PTR) {
5169 r->data.type = mono_metadata_type_dup (image, o->data.type);
5170 } else if (o->type == MONO_TYPE_ARRAY) {
5171 r->data.array = mono_dup_array_type (image, o->data.array);
5172 } else if (o->type == MONO_TYPE_FNPTR) {
5173 /*FIXME the dup'ed signature is leaked mono_metadata_free_type*/
5174 r->data.method = mono_metadata_signature_deep_dup (image, o->data.method);
5175 }
5176 return r;
5177 }
5178
5179 guint
5180 mono_signature_hash (MonoMethodSignature *sig)
5181 {
5182 guint i, res = sig->ret->type;
5183
5184 for (i = 0; i < sig->param_count; i++)
5185 res = (res << 5) - res + mono_type_hash (sig->params[i]);
5186
5187 return res;
5188 }
5189
5190 /*
5191 * mono_metadata_encode_value:
5192 * @value: value to encode
5193 * @buf: buffer where to write the compressed representation
5194 * @endbuf: pointer updated to point at the end of the encoded output
5195 *
5196 * Encodes the value @value in the compressed representation used
5197 * in metadata and stores the result in @buf. @buf needs to be big
5198 * enough to hold the data (4 bytes).
5199 */
5200 void
5201 mono_metadata_encode_value (guint32 value, char *buf, char **endbuf)
5202 {
5203 char *p = buf;
5204
5205 if (value < 0x80)
5206 *p++ = value;
5207 else if (value < 0x4000) {
5208 p [0] = 0x80 | (value >> 8);
5209 p [1] = value & 0xff;
5210 p += 2;
5211 } else {
5212 p [0] = (value >> 24) | 0xc0;
5213 p [1] = (value >> 16) & 0xff;
5214 p [2] = (value >> 8) & 0xff;
5215 p [3] = value & 0xff;
5216 p += 4;
5217 }
5218 if (endbuf)
5219 *endbuf = p;
5220 }
5221
5222 /*
5223 * mono_metadata_field_info:
5224 * @meta: the Image the field is defined in
5225 * @index: the index in the field table representing the field
5226 * @offset: a pointer to an integer where to store the offset that
5227 * may have been specified for the field in a FieldLayout table
5228 * @rva: a pointer to the RVA of the field data in the image that
5229 * may have been defined in a FieldRVA table
5230 * @marshal_spec: a pointer to the marshal spec that may have been
5231 * defined for the field in a FieldMarshal table.
5232 *
5233 * Gather info for field @index that may have been defined in the FieldLayout,
5234 * FieldRVA and FieldMarshal tables.
5235 * Either of offset, rva and marshal_spec can be NULL if you're not interested
5236 * in the data.
5237 */
5238 void
5239 mono_metadata_field_info (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
5240 MonoMarshalSpec **marshal_spec)
5241 {
5242 mono_metadata_field_info_full (meta, index, offset, rva, marshal_spec, FALSE);
5243 }
5244
5245 void
5246 mono_metadata_field_info_with_mempool (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
5247 MonoMarshalSpec **marshal_spec)
5248 {
5249 mono_metadata_field_info_full (meta, index, offset, rva, marshal_spec, TRUE);
5250 }
5251
5252 static void
5253 mono_metadata_field_info_full (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
5254 MonoMarshalSpec **marshal_spec, gboolean alloc_from_image)
5255 {
5256 MonoTableInfo *tdef;
5257 locator_t loc;
5258
5259 loc.idx = index + 1;
5260 if (meta->uncompressed_metadata)
5261 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
5262
5263 if (offset) {
5264 tdef = &meta->tables [MONO_TABLE_FIELDLAYOUT];
5265
5266 loc.col_idx = MONO_FIELD_LAYOUT_FIELD;
5267 loc.t = tdef;
5268
5269 if (tdef->base && mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
5270 *offset = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_LAYOUT_OFFSET);
5271 } else {
5272 *offset = (guint32)-1;
5273 }
5274 }
5275 if (rva) {
5276 tdef = &meta->tables [MONO_TABLE_FIELDRVA];
5277
5278 loc.col_idx = MONO_FIELD_RVA_FIELD;
5279 loc.t = tdef;
5280
5281 if (tdef->base && mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
5282 /*
5283 * LAMESPEC: There is no signature, no nothing, just the raw data.
5284 */
5285 *rva = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_RVA_RVA);
5286 } else {
5287 *rva = 0;
5288 }
5289 }
5290 if (marshal_spec) {
5291 const char *p;
5292
5293 if ((p = mono_metadata_get_marshal_info (meta, index, TRUE))) {
5294 *marshal_spec = mono_metadata_parse_marshal_spec_full (alloc_from_image ? meta : NULL, meta, p);
5295 }
5296 }
5297
5298 }
5299
5300 /*
5301 * mono_metadata_get_constant_index:
5302 * @meta: the Image the field is defined in
5303 * @index: the token that may have a row defined in the constants table
5304 * @hint: possible position for the row
5305 *
5306 * @token must be a FieldDef, ParamDef or PropertyDef token.
5307 *
5308 * Returns: the index into the Constants table or 0 if not found.
5309 */
5310 guint32
5311 mono_metadata_get_constant_index (MonoImage *meta, guint32 token, guint32 hint)
5312 {
5313 MonoTableInfo *tdef;
5314 locator_t loc;
5315 guint32 index = mono_metadata_token_index (token);
5316
5317 tdef = &meta->tables [MONO_TABLE_CONSTANT];
5318 index <<= MONO_HASCONSTANT_BITS;
5319 switch (mono_metadata_token_table (token)) {
5320 case MONO_TABLE_FIELD:
5321 index |= MONO_HASCONSTANT_FIEDDEF;
5322 break;
5323 case MONO_TABLE_PARAM:
5324 index |= MONO_HASCONSTANT_PARAM;
5325 break;
5326 case MONO_TABLE_PROPERTY:
5327 index |= MONO_HASCONSTANT_PROPERTY;
5328 break;
5329 default:
5330 g_warning ("Not a valid token for the constant table: 0x%08x", token);
5331 return 0;
5332 }
5333 loc.idx = index;
5334 loc.col_idx = MONO_CONSTANT_PARENT;
5335 loc.t = tdef;
5336
5337 /* FIXME: Index translation */
5338
5339 if ((hint > 0) && (hint < tdef->rows) && (mono_metadata_decode_row_col (tdef, hint - 1, MONO_CONSTANT_PARENT) == index))
5340 return hint;
5341
5342 if (tdef->base && mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
5343 return loc.result + 1;
5344 }
5345 return 0;
5346 }
5347
5348 /*
5349 * mono_metadata_events_from_typedef:
5350 * @meta: metadata context
5351 * @index: 0-based index (in the TypeDef table) describing a type
5352 *
5353 * Returns: the 0-based index in the Event table for the events in the
5354 * type. The last event that belongs to the type (plus 1) is stored
5355 * in the @end_idx pointer.
5356 */
5357 guint32
5358 mono_metadata_events_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
5359 {
5360 locator_t loc;
5361 guint32 start, end;
5362 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_EVENTMAP];
5363
5364 *end_idx = 0;
5365
5366 if (!tdef->base)
5367 return 0;
5368
5369 loc.t = tdef;
5370 loc.col_idx = MONO_EVENT_MAP_PARENT;
5371 loc.idx = index + 1;
5372
5373 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5374 return 0;
5375
5376 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_EVENT_MAP_EVENTLIST);
5377 if (loc.result + 1 < tdef->rows) {
5378 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_EVENT_MAP_EVENTLIST) - 1;
5379 } else {
5380 end = meta->tables [MONO_TABLE_EVENT].rows;
5381 }
5382
5383 *end_idx = end;
5384 return start - 1;
5385 }
5386
5387 /*
5388 * mono_metadata_methods_from_event:
5389 * @meta: metadata context
5390 * @index: 0-based index (in the Event table) describing a event
5391 *
5392 * Returns: the 0-based index in the MethodDef table for the methods in the
5393 * event. The last method that belongs to the event (plus 1) is stored
5394 * in the @end_idx pointer.
5395 */
5396 guint32
5397 mono_metadata_methods_from_event (MonoImage *meta, guint32 index, guint *end_idx)
5398 {
5399 locator_t loc;
5400 guint start, end;
5401 guint32 cols [MONO_METHOD_SEMA_SIZE];
5402 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
5403
5404 *end_idx = 0;
5405 if (!msemt->base)
5406 return 0;
5407
5408 if (meta->uncompressed_metadata)
5409 index = search_ptr_table (meta, MONO_TABLE_EVENT_POINTER, index + 1) - 1;
5410
5411 loc.t = msemt;
5412 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
5413 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_EVENT; /* Method association coded index */
5414
5415 if (!mono_binary_search (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
5416 return 0;
5417
5418 start = loc.result;
5419 /*
5420 * We may end up in the middle of the rows...
5421 */
5422 while (start > 0) {
5423 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
5424 start--;
5425 else
5426 break;
5427 }
5428 end = start + 1;
5429 while (end < msemt->rows) {
5430 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
5431 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
5432 break;
5433 ++end;
5434 }
5435 *end_idx = end;
5436 return start;
5437 }
5438
5439 /*
5440 * mono_metadata_properties_from_typedef:
5441 * @meta: metadata context
5442 * @index: 0-based index (in the TypeDef table) describing a type
5443 *
5444 * Returns: the 0-based index in the Property table for the properties in the
5445 * type. The last property that belongs to the type (plus 1) is stored
5446 * in the @end_idx pointer.
5447 */
5448 guint32
5449 mono_metadata_properties_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
5450 {
5451 locator_t loc;
5452 guint32 start, end;
5453 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_PROPERTYMAP];
5454
5455 *end_idx = 0;
5456
5457 if (!tdef->base)
5458 return 0;
5459
5460 loc.t = tdef;
5461 loc.col_idx = MONO_PROPERTY_MAP_PARENT;
5462 loc.idx = index + 1;
5463
5464 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5465 return 0;
5466
5467 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_PROPERTY_MAP_PROPERTY_LIST);
5468 if (loc.result + 1 < tdef->rows) {
5469 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_PROPERTY_MAP_PROPERTY_LIST) - 1;
5470 } else {
5471 end = meta->tables [MONO_TABLE_PROPERTY].rows;
5472 }
5473
5474 *end_idx = end;
5475 return start - 1;
5476 }
5477
5478 /*
5479 * mono_metadata_methods_from_property:
5480 * @meta: metadata context
5481 * @index: 0-based index (in the PropertyDef table) describing a property
5482 *
5483 * Returns: the 0-based index in the MethodDef table for the methods in the
5484 * property. The last method that belongs to the property (plus 1) is stored
5485 * in the @end_idx pointer.
5486 */
5487 guint32
5488 mono_metadata_methods_from_property (MonoImage *meta, guint32 index, guint *end_idx)
5489 {
5490 locator_t loc;
5491 guint start, end;
5492 guint32 cols [MONO_METHOD_SEMA_SIZE];
5493 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
5494
5495 *end_idx = 0;
5496 if (!msemt->base)
5497 return 0;
5498
5499 if (meta->uncompressed_metadata)
5500 index = search_ptr_table (meta, MONO_TABLE_PROPERTY_POINTER, index + 1) - 1;
5501
5502 loc.t = msemt;
5503 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
5504 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_PROPERTY; /* Method association coded index */
5505
5506 if (!mono_binary_search (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
5507 return 0;
5508
5509 start = loc.result;
5510 /*
5511 * We may end up in the middle of the rows...
5512 */
5513 while (start > 0) {
5514 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
5515 start--;
5516 else
5517 break;
5518 }
5519 end = start + 1;
5520 while (end < msemt->rows) {
5521 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
5522 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
5523 break;
5524 ++end;
5525 }
5526 *end_idx = end;
5527 return start;
5528 }
5529
5530 guint32
5531 mono_metadata_implmap_from_method (MonoImage *meta, guint32 method_idx)
5532 {
5533 locator_t loc;
5534 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_IMPLMAP];
5535
5536 if (!tdef->base)
5537 return 0;
5538
5539 /* No index translation seems to be needed */
5540
5541 loc.t = tdef;
5542 loc.col_idx = MONO_IMPLMAP_MEMBER;
5543 loc.idx = ((method_idx + 1) << MONO_MEMBERFORWD_BITS) | MONO_MEMBERFORWD_METHODDEF;
5544
5545 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5546 return 0;
5547
5548 return loc.result + 1;
5549 }
5550
5551 /**
5552 * @image: context where the image is created
5553 * @type_spec: typespec token
5554 * @deprecated use mono_type_create_from_typespec_checked that has proper error handling
5555 *
5556 * Creates a MonoType representing the TypeSpec indexed by the @type_spec
5557 * token.
5558 */
5559 MonoType *
5560 mono_type_create_from_typespec (MonoImage *image, guint32 type_spec)
5561 {
5562 MonoError error;
5563 MonoType *type = mono_type_create_from_typespec_checked (image, type_spec, &error);
5564 if (!type)
5565 g_error ("Could not create typespec %x due to %s", type_spec, mono_error_get_message (&error));
5566 return type;
5567 }
5568
5569 MonoType *
5570 mono_type_create_from_typespec_checked (MonoImage *image, guint32 type_spec, MonoError *error)
5571
5572 {
5573 guint32 idx = mono_metadata_token_index (type_spec);
5574 MonoTableInfo *t;
5575 guint32 cols [MONO_TYPESPEC_SIZE];
5576 const char *ptr;
5577 MonoType *type, *type2;
5578
5579 mono_error_init (error);
5580
5581 mono_image_lock (image);
5582 type = (MonoType *)g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
5583 mono_image_unlock (image);
5584 if (type)
5585 return type;
5586
5587 t = &image->tables [MONO_TABLE_TYPESPEC];
5588
5589 mono_metadata_decode_row (t, idx-1, cols, MONO_TYPESPEC_SIZE);
5590 ptr = mono_metadata_blob_heap (image, cols [MONO_TYPESPEC_SIGNATURE]);
5591
5592 if (!mono_verifier_verify_typespec_signature (image, cols [MONO_TYPESPEC_SIGNATURE], type_spec, NULL)) {
5593 mono_error_set_bad_image (error, image, "Could not verify type spec %08x.", type_spec);
5594 return NULL;
5595 }
5596
5597 mono_metadata_decode_value (ptr, &ptr);
5598
5599 type = mono_metadata_parse_type_checked (image, NULL, 0, TRUE, ptr, &ptr, error);
5600 if (!type)
5601 return NULL;
5602
5603 type2 = mono_metadata_type_dup (image, type);
5604 mono_metadata_free_type (type);
5605
5606 mono_image_lock (image);
5607 type = (MonoType *)g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
5608 /* We might leak some data in the image mempool if found */
5609 if (!type) {
5610 g_hash_table_insert (image->typespec_cache, GUINT_TO_POINTER (type_spec), type2);
5611 type = type2;
5612 }
5613 mono_image_unlock (image);
5614
5615 return type;
5616 }
5617
5618
5619 static char*
5620 mono_image_strndup (MonoImage *image, const char *data, guint len)
5621 {
5622 char *res;
5623 if (!image)
5624 return g_strndup (data, len);
5625 res = (char *)mono_image_alloc (image, len + 1);
5626 memcpy (res, data, len);
5627 res [len] = 0;
5628 return res;
5629 }
5630
5631 MonoMarshalSpec *
5632 mono_metadata_parse_marshal_spec (MonoImage *image, const char *ptr)
5633 {
5634 return mono_metadata_parse_marshal_spec_full (NULL, image, ptr);
5635 }
5636
5637 /*
5638 * If IMAGE is non-null, memory will be allocated from its mempool, otherwise it will be allocated using malloc.
5639 * PARENT_IMAGE is the image containing the marshal spec.
5640 */
5641 MonoMarshalSpec *
5642 mono_metadata_parse_marshal_spec_full (MonoImage *image, MonoImage *parent_image, const char *ptr)
5643 {
5644 MonoMarshalSpec *res;
5645 int len;
5646 const char *start = ptr;
5647
5648 /* fixme: this is incomplete, but I cant find more infos in the specs */
5649
5650 if (image)
5651 res = (MonoMarshalSpec *)mono_image_alloc0 (image, sizeof (MonoMarshalSpec));
5652 else
5653 res = g_new0 (MonoMarshalSpec, 1);
5654
5655 len = mono_metadata_decode_value (ptr, &ptr);
5656 res->native = (MonoMarshalNative)*ptr++;
5657
5658 if (res->native == MONO_NATIVE_LPARRAY) {
5659 res->data.array_data.param_num = -1;
5660 res->data.array_data.num_elem = -1;
5661 res->data.array_data.elem_mult = -1;
5662
5663 if (ptr - start <= len)
5664 res->data.array_data.elem_type = (MonoMarshalNative)*ptr++;
5665 if (ptr - start <= len)
5666 res->data.array_data.param_num = mono_metadata_decode_value (ptr, &ptr);
5667 if (ptr - start <= len)
5668 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
5669 if (ptr - start <= len) {
5670 /*
5671 * LAMESPEC: Older spec versions say this parameter comes before
5672 * num_elem. Never spec versions don't talk about elem_mult at
5673 * all, but csc still emits it, and it is used to distinguish
5674 * between param_num being 0, and param_num being omitted.
5675 * So if (param_num == 0) && (num_elem > 0), then
5676 * elem_mult == 0 -> the array size is num_elem
5677 * elem_mult == 1 -> the array size is @param_num + num_elem
5678 */
5679 res->data.array_data.elem_mult = mono_metadata_decode_value (ptr, &ptr);
5680 }
5681 }
5682
5683 if (res->native == MONO_NATIVE_BYVALTSTR) {
5684 if (ptr - start <= len)
5685 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
5686 }
5687
5688 if (res->native == MONO_NATIVE_BYVALARRAY) {
5689 if (ptr - start <= len)
5690 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
5691 }
5692
5693 if (res->native == MONO_NATIVE_CUSTOM) {
5694 /* skip unused type guid */
5695 len = mono_metadata_decode_value (ptr, &ptr);
5696 ptr += len;
5697 /* skip unused native type name */
5698 len = mono_metadata_decode_value (ptr, &ptr);
5699 ptr += len;
5700 /* read custom marshaler type name */
5701 len = mono_metadata_decode_value (ptr, &ptr);
5702 res->data.custom_data.custom_name = mono_image_strndup (image, ptr, len);
5703 ptr += len;
5704 /* read cookie string */
5705 len = mono_metadata_decode_value (ptr, &ptr);
5706 res->data.custom_data.cookie = mono_image_strndup (image, ptr, len);
5707 res->data.custom_data.image = parent_image;
5708 }
5709
5710 if (res->native == MONO_NATIVE_SAFEARRAY) {
5711 res->data.safearray_data.elem_type = (MonoMarshalVariant)0;
5712 res->data.safearray_data.num_elem = 0;
5713 if (ptr - start <= len)
5714 res->data.safearray_data.elem_type = (MonoMarshalVariant)*ptr++;
5715 if (ptr - start <= len)
5716 res->data.safearray_data.num_elem = *ptr++;
5717 }
5718 return res;
5719 }
5720
5721 void
5722 mono_metadata_free_marshal_spec (MonoMarshalSpec *spec)
5723 {
5724 if (spec->native == MONO_NATIVE_CUSTOM) {
5725 g_free (spec->data.custom_data.custom_name);
5726 g_free (spec->data.custom_data.cookie);
5727 }
5728 g_free (spec);
5729 }
5730
5731 /**
5732 * mono_type_to_unmanaged:
5733 *
5734 * Returns: A MonoMarshalNative enumeration value (MONO_NATIVE_) value
5735 * describing the underlying native reprensetation of the type.
5736 *
5737 * In addition the value pointed by
5738 * "conv" will contain the kind of marshalling required for this
5739 * particular type one of the MONO_MARSHAL_CONV_ enumeration values.
5740 */
5741 guint32
5742 mono_type_to_unmanaged (MonoType *type, MonoMarshalSpec *mspec, gboolean as_field,
5743 gboolean unicode, MonoMarshalConv *conv)
5744 {
5745 MonoMarshalConv dummy_conv;
5746 int t = type->type;
5747
5748 if (!conv)
5749 conv = &dummy_conv;
5750
5751 *conv = MONO_MARSHAL_CONV_NONE;
5752
5753 if (type->byref)
5754 return MONO_NATIVE_UINT;
5755
5756 handle_enum:
5757 switch (t) {
5758 case MONO_TYPE_BOOLEAN:
5759 if (mspec) {
5760 switch (mspec->native) {
5761 case MONO_NATIVE_VARIANTBOOL:
5762 *conv = MONO_MARSHAL_CONV_BOOL_VARIANTBOOL;
5763 return MONO_NATIVE_VARIANTBOOL;
5764 case MONO_NATIVE_BOOLEAN:
5765 *conv = MONO_MARSHAL_CONV_BOOL_I4;
5766 return MONO_NATIVE_BOOLEAN;
5767 case MONO_NATIVE_I1:
5768 case MONO_NATIVE_U1:
5769 return mspec->native;
5770 default:
5771 g_error ("cant marshal bool to native type %02x", mspec->native);
5772 }
5773 }
5774 *conv = MONO_MARSHAL_CONV_BOOL_I4;
5775 return MONO_NATIVE_BOOLEAN;
5776 case MONO_TYPE_CHAR:
5777 if (mspec) {
5778 switch (mspec->native) {
5779 case MONO_NATIVE_U2:
5780 case MONO_NATIVE_U1:
5781 return mspec->native;
5782 default:
5783 g_error ("cant marshal char to native type %02x", mspec->native);
5784 }
5785 }
5786 return unicode ? MONO_NATIVE_U2 : MONO_NATIVE_U1;
5787 case MONO_TYPE_I1: return MONO_NATIVE_I1;
5788 case MONO_TYPE_U1: return MONO_NATIVE_U1;
5789 case MONO_TYPE_I2: return MONO_NATIVE_I2;
5790 case MONO_TYPE_U2: return MONO_NATIVE_U2;
5791 case MONO_TYPE_I4: return MONO_NATIVE_I4;
5792 case MONO_TYPE_U4: return MONO_NATIVE_U4;
5793 case MONO_TYPE_I8: return MONO_NATIVE_I8;
5794 case MONO_TYPE_U8: return MONO_NATIVE_U8;
5795 case MONO_TYPE_R4: return MONO_NATIVE_R4;
5796 case MONO_TYPE_R8: return MONO_NATIVE_R8;
5797 case MONO_TYPE_STRING:
5798 if (mspec) {
5799 switch (mspec->native) {
5800 case MONO_NATIVE_BSTR:
5801 *conv = MONO_MARSHAL_CONV_STR_BSTR;
5802 return MONO_NATIVE_BSTR;
5803 case MONO_NATIVE_LPSTR:
5804 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
5805 return MONO_NATIVE_LPSTR;
5806 case MONO_NATIVE_LPWSTR:
5807 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
5808 return MONO_NATIVE_LPWSTR;
5809 case MONO_NATIVE_LPTSTR:
5810 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
5811 return MONO_NATIVE_LPTSTR;
5812 case MONO_NATIVE_ANSIBSTR:
5813 *conv = MONO_MARSHAL_CONV_STR_ANSIBSTR;
5814 return MONO_NATIVE_ANSIBSTR;
5815 case MONO_NATIVE_TBSTR:
5816 *conv = MONO_MARSHAL_CONV_STR_TBSTR;
5817 return MONO_NATIVE_TBSTR;
5818 case MONO_NATIVE_BYVALTSTR:
5819 if (unicode)
5820 *conv = MONO_MARSHAL_CONV_STR_BYVALWSTR;
5821 else
5822 *conv = MONO_MARSHAL_CONV_STR_BYVALSTR;
5823 return MONO_NATIVE_BYVALTSTR;
5824 default:
5825 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);
5826 }
5827 }
5828 if (unicode) {
5829 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
5830 return MONO_NATIVE_LPWSTR;
5831 }
5832 else {
5833 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
5834 return MONO_NATIVE_LPSTR;
5835 }
5836 case MONO_TYPE_PTR: return MONO_NATIVE_UINT;
5837 case MONO_TYPE_VALUETYPE: /*FIXME*/
5838 if (type->data.klass->enumtype) {
5839 t = mono_class_enum_basetype (type->data.klass)->type;
5840 goto handle_enum;
5841 }
5842 if (type->data.klass == mono_defaults.handleref_class){
5843 *conv = MONO_MARSHAL_CONV_HANDLEREF;
5844 return MONO_NATIVE_INT;
5845 }
5846 return MONO_NATIVE_STRUCT;
5847 case MONO_TYPE_SZARRAY:
5848 case MONO_TYPE_ARRAY:
5849 if (mspec) {
5850 switch (mspec->native) {
5851 case MONO_NATIVE_BYVALARRAY:
5852 if ((type->data.klass->element_class == mono_defaults.char_class) && !unicode)
5853 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALCHARARRAY;
5854 else
5855 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALARRAY;
5856 return MONO_NATIVE_BYVALARRAY;
5857 case MONO_NATIVE_SAFEARRAY:
5858 *conv = MONO_MARSHAL_CONV_ARRAY_SAVEARRAY;
5859 return MONO_NATIVE_SAFEARRAY;
5860 case MONO_NATIVE_LPARRAY:
5861 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
5862 return MONO_NATIVE_LPARRAY;
5863 default:
5864 g_error ("cant marshal array as native type %02x", mspec->native);
5865 }
5866 }
5867
5868 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
5869 return MONO_NATIVE_LPARRAY;
5870 case MONO_TYPE_I: return MONO_NATIVE_INT;
5871 case MONO_TYPE_U: return MONO_NATIVE_UINT;
5872 case MONO_TYPE_CLASS:
5873 case MONO_TYPE_OBJECT: {
5874 /* FIXME : we need to handle ArrayList and StringBuilder here, probably */
5875 if (mspec) {
5876 switch (mspec->native) {
5877 case MONO_NATIVE_STRUCT:
5878 return MONO_NATIVE_STRUCT;
5879 case MONO_NATIVE_CUSTOM:
5880 return MONO_NATIVE_CUSTOM;
5881 case MONO_NATIVE_INTERFACE:
5882 *conv = MONO_MARSHAL_CONV_OBJECT_INTERFACE;
5883 return MONO_NATIVE_INTERFACE;
5884 case MONO_NATIVE_IDISPATCH:
5885 *conv = MONO_MARSHAL_CONV_OBJECT_IDISPATCH;
5886 return MONO_NATIVE_IDISPATCH;
5887 case MONO_NATIVE_IUNKNOWN:
5888 *conv = MONO_MARSHAL_CONV_OBJECT_IUNKNOWN;
5889 return MONO_NATIVE_IUNKNOWN;
5890 case MONO_NATIVE_FUNC:
5891 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
5892 type->data.klass == mono_defaults.delegate_class ||
5893 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
5894 *conv = MONO_MARSHAL_CONV_DEL_FTN;
5895 return MONO_NATIVE_FUNC;
5896 }
5897 /* Fall through */
5898 default:
5899 g_error ("cant marshal object as native type %02x", mspec->native);
5900 }
5901 }
5902 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
5903 type->data.klass == mono_defaults.delegate_class ||
5904 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
5905 *conv = MONO_MARSHAL_CONV_DEL_FTN;
5906 return MONO_NATIVE_FUNC;
5907 }
5908 if (mono_class_try_get_safehandle_class () && type->data.klass == mono_class_try_get_safehandle_class ()){
5909 *conv = MONO_MARSHAL_CONV_SAFEHANDLE;
5910 return MONO_NATIVE_INT;
5911 }
5912 *conv = MONO_MARSHAL_CONV_OBJECT_STRUCT;
5913 return MONO_NATIVE_STRUCT;
5914 }
5915 case MONO_TYPE_FNPTR: return MONO_NATIVE_FUNC;
5916 case MONO_TYPE_GENERICINST:
5917 type = &type->data.generic_class->container_class->byval_arg;
5918 t = type->type;
5919 goto handle_enum;
5920 case MONO_TYPE_TYPEDBYREF:
5921 default:
5922 g_error ("type 0x%02x not handled in marshal", t);
5923 }
5924 return MONO_NATIVE_MAX;
5925 }
5926
5927 const char*
5928 mono_metadata_get_marshal_info (MonoImage *meta, guint32 idx, gboolean is_field)
5929 {
5930 locator_t loc;
5931 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_FIELDMARSHAL];
5932
5933 if (!tdef->base)
5934 return NULL;
5935
5936 loc.t = tdef;
5937 loc.col_idx = MONO_FIELD_MARSHAL_PARENT;
5938 loc.idx = ((idx + 1) << MONO_HAS_FIELD_MARSHAL_BITS) | (is_field? MONO_HAS_FIELD_MARSHAL_FIELDSREF: MONO_HAS_FIELD_MARSHAL_PARAMDEF);
5939
5940 /* FIXME: Index translation */
5941
5942 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5943 return NULL;
5944
5945 return mono_metadata_blob_heap (meta, mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_MARSHAL_NATIVE_TYPE));
5946 }
5947
5948 MonoMethod*
5949 method_from_method_def_or_ref (MonoImage *m, guint32 tok, MonoGenericContext *context, MonoError *error)
5950 {
5951 MonoMethod *result = NULL;
5952 guint32 idx = tok >> MONO_METHODDEFORREF_BITS;
5953
5954 mono_error_init (error);
5955
5956 switch (tok & MONO_METHODDEFORREF_MASK) {
5957 case MONO_METHODDEFORREF_METHODDEF:
5958 result = mono_get_method_checked (m, MONO_TOKEN_METHOD_DEF | idx, NULL, context, error);
5959 break;
5960 case MONO_METHODDEFORREF_METHODREF:
5961 result = mono_get_method_checked (m, MONO_TOKEN_MEMBER_REF | idx, NULL, context, error);
5962 break;
5963 default:
5964 mono_error_set_bad_image (error, m, "Invalid MethodDefOfRef token %x", tok);
5965 }
5966
5967 return result;
5968 }
5969
5970 /*
5971 * mono_class_get_overrides_full:
5972 *
5973 * Return the method overrides belonging to class @type_token in @overrides, and
5974 * the number of overrides in @num_overrides.
5975 *
5976 * Returns: TRUE on success, FALSE on failure.
5977 */
5978 gboolean
5979 mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod ***overrides, gint32 *num_overrides,
5980 MonoGenericContext *generic_context)
5981 {
5982 MonoError error;
5983 locator_t loc;
5984 MonoTableInfo *tdef = &image->tables [MONO_TABLE_METHODIMPL];
5985 guint32 start, end;
5986 gint32 i, num;
5987 guint32 cols [MONO_METHODIMPL_SIZE];
5988 MonoMethod **result;
5989 gint32 ok = TRUE;
5990
5991 *overrides = NULL;
5992 if (num_overrides)
5993 *num_overrides = 0;
5994
5995 if (!tdef->base)
5996 return TRUE;
5997
5998 loc.t = tdef;
5999 loc.col_idx = MONO_METHODIMPL_CLASS;
6000 loc.idx = mono_metadata_token_index (type_token);
6001
6002 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
6003 return TRUE;
6004
6005 start = loc.result;
6006 end = start + 1;
6007 /*
6008 * We may end up in the middle of the rows...
6009 */
6010 while (start > 0) {
6011 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_METHODIMPL_CLASS))
6012 start--;
6013 else
6014 break;
6015 }
6016 while (end < tdef->rows) {
6017 if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
6018 end++;
6019 else
6020 break;
6021 }
6022 num = end - start;
6023 result = g_new (MonoMethod*, num * 2);
6024 for (i = 0; i < num; ++i) {
6025 MonoMethod *method;
6026
6027 if (!mono_verifier_verify_methodimpl_row (image, start + i, &error)) {
6028 mono_error_cleanup (&error); /* FIXME don't swallow the error */
6029 ok = FALSE;
6030 break;
6031 }
6032
6033 mono_metadata_decode_row (tdef, start + i, cols, MONO_METHODIMPL_SIZE);
6034 method = method_from_method_def_or_ref (
6035 image, cols [MONO_METHODIMPL_DECLARATION], generic_context, &error);
6036 if (method == NULL) {
6037 mono_error_cleanup (&error); /* FIXME don't swallow the error */
6038 ok = FALSE;
6039 }
6040 result [i * 2] = method;
6041 method = method_from_method_def_or_ref (
6042 image, cols [MONO_METHODIMPL_BODY], generic_context, &error);
6043 if (method == NULL) {
6044 mono_error_cleanup (&error); /* FIXME don't swallow the error */
6045 ok = FALSE;
6046 }
6047 result [i * 2 + 1] = method;
6048 }
6049
6050 *overrides = result;
6051 if (num_overrides)
6052 *num_overrides = num;
6053 return ok;
6054 }
6055
6056 /**
6057 * mono_guid_to_string:
6058 *
6059 * Converts a 16 byte Microsoft GUID to the standard string representation.
6060 */
6061 char *
6062 mono_guid_to_string (const guint8 *guid)
6063 {
6064 return g_strdup_printf ("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
6065 guid[3], guid[2], guid[1], guid[0],
6066 guid[5], guid[4],
6067 guid[7], guid[6],
6068 guid[8], guid[9],
6069 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
6070 }
6071
6072 /**
6073 * mono_guid_to_string_minimal:
6074 *
6075 * Converts a 16 byte Microsoft GUID to lower case no '-' representation..
6076 */
6077 char *
6078 mono_guid_to_string_minimal (const guint8 *guid)
6079 {
6080 return g_strdup_printf ("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
6081 guid[3], guid[2], guid[1], guid[0],
6082 guid[5], guid[4],
6083 guid[7], guid[6],
6084 guid[8], guid[9],
6085 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
6086 }
6087 static gboolean
6088 get_constraints (MonoImage *image, int owner, MonoClass ***constraints, MonoGenericContainer *container, MonoError *error)
6089 {
6090 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAMCONSTRAINT];
6091 guint32 cols [MONO_GENPARCONSTRAINT_SIZE];
6092 guint32 i, token, found;
6093 MonoClass *klass, **res;
6094 GSList *cons = NULL, *tmp;
6095 MonoGenericContext *context = &container->context;
6096
6097 mono_error_init (error);
6098
6099 *constraints = NULL;
6100 found = 0;
6101 for (i = 0; i < tdef->rows; ++i) {
6102 mono_metadata_decode_row (tdef, i, cols, MONO_GENPARCONSTRAINT_SIZE);
6103 if (cols [MONO_GENPARCONSTRAINT_GENERICPAR] == owner) {
6104 token = mono_metadata_token_from_dor (cols [MONO_GENPARCONSTRAINT_CONSTRAINT]);
6105 klass = mono_class_get_and_inflate_typespec_checked (image, token, context, error);
6106 if (!klass) {
6107 g_slist_free (cons);
6108 return FALSE;
6109 }
6110 cons = g_slist_append (cons, klass);
6111 ++found;
6112 } else {
6113 /* contiguous list finished */
6114 if (found)
6115 break;
6116 }
6117 }
6118 if (!found)
6119 return TRUE;
6120 res = (MonoClass **)mono_image_alloc0 (image, sizeof (MonoClass*) * (found + 1));
6121 for (i = 0, tmp = cons; i < found; ++i, tmp = tmp->next) {
6122 res [i] = (MonoClass *)tmp->data;
6123 }
6124 g_slist_free (cons);
6125 *constraints = res;
6126 return TRUE;
6127 }
6128
6129 /*
6130 * mono_metadata_get_generic_param_row:
6131 *
6132 * @image:
6133 * @token: TypeOrMethodDef token, owner for GenericParam
6134 * @owner: coded token, set on return
6135 *
6136 * Returns: 1-based row-id in the GenericParam table whose
6137 * owner is @token. 0 if not found.
6138 */
6139 guint32
6140 mono_metadata_get_generic_param_row (MonoImage *image, guint32 token, guint32 *owner)
6141 {
6142 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
6143 locator_t loc;
6144
6145 g_assert (owner);
6146 if (!tdef->base)
6147 return 0;
6148
6149 if (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
6150 *owner = MONO_TYPEORMETHOD_TYPE;
6151 else if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
6152 *owner = MONO_TYPEORMETHOD_METHOD;
6153 else {
6154 g_error ("wrong token %x to get_generic_param_row", token);
6155 return 0;
6156 }
6157 *owner |= mono_metadata_token_index (token) << MONO_TYPEORMETHOD_BITS;
6158
6159 loc.idx = *owner;
6160 loc.col_idx = MONO_GENERICPARAM_OWNER;
6161 loc.t = tdef;
6162
6163 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
6164 return 0;
6165
6166 /* Find the first entry by searching backwards */
6167 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_GENERICPARAM_OWNER) == loc.idx))
6168 loc.result --;
6169
6170 return loc.result + 1;
6171 }
6172
6173 gboolean
6174 mono_metadata_has_generic_params (MonoImage *image, guint32 token)
6175 {
6176 guint32 owner;
6177 return mono_metadata_get_generic_param_row (image, token, &owner);
6178 }
6179
6180 /*
6181 * Memory is allocated from IMAGE's mempool.
6182 */
6183 gboolean
6184 mono_metadata_load_generic_param_constraints_checked (MonoImage *image, guint32 token,
6185 MonoGenericContainer *container, MonoError *error)
6186 {
6187
6188 guint32 start_row, i, owner;
6189 mono_error_init (error);
6190
6191 if (! (start_row = mono_metadata_get_generic_param_row (image, token, &owner)))
6192 return TRUE;
6193 for (i = 0; i < container->type_argc; i++) {
6194 if (!get_constraints (image, start_row + i, &mono_generic_container_get_param_info (container, i)->constraints, container, error)) {
6195 return FALSE;
6196 }
6197 }
6198 return TRUE;
6199 }
6200
6201 /*
6202 * mono_metadata_load_generic_params:
6203 *
6204 * Load the type parameters from the type or method definition @token.
6205 *
6206 * Use this method after parsing a type or method definition to figure out whether it's a generic
6207 * type / method. When parsing a method definition, @parent_container points to the generic container
6208 * of the current class, if any.
6209 *
6210 * Note: This method does not load the constraints: for typedefs, this has to be done after fully
6211 * creating the type.
6212 *
6213 * Returns: NULL if @token is not a generic type or method definition or the new generic container.
6214 *
6215 * LOCKING: Acquires the loader lock
6216 *
6217 */
6218 MonoGenericContainer *
6219 mono_metadata_load_generic_params (MonoImage *image, guint32 token, MonoGenericContainer *parent_container)
6220 {
6221 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
6222 guint32 cols [MONO_GENERICPARAM_SIZE];
6223 guint32 i, owner = 0, n;
6224 MonoGenericContainer *container;
6225 MonoGenericParamFull *params;
6226 MonoGenericContext *context;
6227
6228 if (!(i = mono_metadata_get_generic_param_row (image, token, &owner)))
6229 return NULL;
6230 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
6231 params = NULL;
6232 n = 0;
6233 container = (MonoGenericContainer *)mono_image_alloc0 (image, sizeof (MonoGenericContainer));
6234 container->owner.image = image; // Temporarily mark as anonymous, but this will be overriden by caller
6235 container->is_anonymous = TRUE;
6236 do {
6237 n++;
6238 params = (MonoGenericParamFull *)g_realloc (params, sizeof (MonoGenericParamFull) * n);
6239 memset (&params [n - 1], 0, sizeof (MonoGenericParamFull));
6240 params [n - 1].param.owner = container;
6241 params [n - 1].param.num = cols [MONO_GENERICPARAM_NUMBER];
6242 params [n - 1].info.token = i | MONO_TOKEN_GENERIC_PARAM;
6243 params [n - 1].info.flags = cols [MONO_GENERICPARAM_FLAGS];
6244 params [n - 1].info.name = mono_metadata_string_heap (image, cols [MONO_GENERICPARAM_NAME]);
6245 if (params [n - 1].param.num != n - 1)
6246 g_warning ("GenericParam table unsorted or hole in generic param sequence: token %d", i);
6247 if (++i > tdef->rows)
6248 break;
6249 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
6250 } while (cols [MONO_GENERICPARAM_OWNER] == owner);
6251
6252 container->type_argc = n;
6253 container->type_params = (MonoGenericParamFull *)mono_image_alloc0 (image, sizeof (MonoGenericParamFull) * n);
6254 memcpy (container->type_params, params, sizeof (MonoGenericParamFull) * n);
6255 g_free (params);
6256 container->parent = parent_container;
6257
6258 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
6259 container->is_method = 1;
6260
6261 g_assert (container->parent == NULL || container->is_method);
6262
6263 context = &container->context;
6264 if (container->is_method) {
6265 context->class_inst = container->parent ? container->parent->context.class_inst : NULL;
6266 context->method_inst = mono_get_shared_generic_inst (container);
6267 } else {
6268 context->class_inst = mono_get_shared_generic_inst (container);
6269 }
6270
6271 return container;
6272 }
6273
6274 MonoGenericInst *
6275 mono_get_shared_generic_inst (MonoGenericContainer *container)
6276 {
6277 MonoType **type_argv;
6278 MonoType *helper;
6279 MonoGenericInst *nginst;
6280 int i;
6281
6282 type_argv = g_new0 (MonoType *, container->type_argc);
6283 helper = g_new0 (MonoType, container->type_argc);
6284
6285 for (i = 0; i < container->type_argc; i++) {
6286 MonoType *t = &helper [i];
6287
6288 t->type = container->is_method ? MONO_TYPE_MVAR : MONO_TYPE_VAR;
6289 t->data.generic_param = mono_generic_container_get_param (container, i);
6290
6291 type_argv [i] = t;
6292 }
6293
6294 nginst = mono_metadata_get_generic_inst (container->type_argc, type_argv);
6295
6296 g_free (type_argv);
6297 g_free (helper);
6298
6299 return nginst;
6300 }
6301
6302 /**
6303 * mono_type_is_byref:
6304 * @type: the MonoType operated on
6305 *
6306 * Returns: #TRUE if @type represents a type passed by reference,
6307 * #FALSE otherwise.
6308 */
6309 gboolean
6310 mono_type_is_byref (MonoType *type)
6311 {
6312 return type->byref;
6313 }
6314
6315 /**
6316 * mono_type_get_type:
6317 * @type: the MonoType operated on
6318 *
6319 * Returns: the IL type value for @type. This is one of the MonoTypeEnum
6320 * enum members like MONO_TYPE_I4 or MONO_TYPE_STRING.
6321 */
6322 int
6323 mono_type_get_type (MonoType *type)
6324 {
6325 return type->type;
6326 }
6327
6328 /**
6329 * mono_type_get_signature:
6330 * @type: the MonoType operated on
6331 *
6332 * It is only valid to call this function if @type is a MONO_TYPE_FNPTR.
6333 *
6334 * Returns: the MonoMethodSignature pointer that describes the signature
6335 * of the function pointer @type represents.
6336 */
6337 MonoMethodSignature*
6338 mono_type_get_signature (MonoType *type)
6339 {
6340 g_assert (type->type == MONO_TYPE_FNPTR);
6341 return type->data.method;
6342 }
6343
6344 /**
6345 * mono_type_get_class:
6346 * @type: the MonoType operated on
6347 *
6348 * It is only valid to call this function if @type is a MONO_TYPE_CLASS or a
6349 * MONO_TYPE_VALUETYPE. For more general functionality, use mono_class_from_mono_type (),
6350 * instead
6351 *
6352 * Returns: the MonoClass pointer that describes the class that @type represents.
6353 */
6354 MonoClass*
6355 mono_type_get_class (MonoType *type)
6356 {
6357 /* FIXME: review the runtime users before adding the assert here */
6358 return type->data.klass;
6359 }
6360
6361 /**
6362 * mono_type_get_array_type:
6363 * @type: the MonoType operated on
6364 *
6365 * It is only valid to call this function if @type is a MONO_TYPE_ARRAY.
6366 *
6367 * Returns: a MonoArrayType struct describing the array type that @type
6368 * represents. The info includes details such as rank, array element type
6369 * and the sizes and bounds of multidimensional arrays.
6370 */
6371 MonoArrayType*
6372 mono_type_get_array_type (MonoType *type)
6373 {
6374 return type->data.array;
6375 }
6376
6377 /**
6378 * mono_type_get_ptr_type:
6379 * @type: the MonoType operated on
6380 *
6381 * It is only valid to call this function if @type is a MONO_TYPE_PTR.
6382 * instead
6383 *
6384 * Returns: the MonoType pointer that describes the type that @type
6385 * represents a pointer to.
6386 */
6387 MonoType*
6388 mono_type_get_ptr_type (MonoType *type)
6389 {
6390 g_assert (type->type == MONO_TYPE_PTR);
6391 return type->data.type;
6392 }
6393
6394 MonoClass*
6395 mono_type_get_modifiers (MonoType *type, gboolean *is_required, gpointer *iter)
6396 {
6397 /* FIXME: implement */
6398 return NULL;
6399 }
6400
6401 /**
6402 * mono_type_is_struct:
6403 * @type: the MonoType operated on
6404 *
6405 * Returns: #TRUE is @type is a struct, that is a ValueType but not en enum
6406 * or a basic type like System.Int32. #FALSE otherwise.
6407 */
6408 mono_bool
6409 mono_type_is_struct (MonoType *type)
6410 {
6411 return (!type->byref && ((type->type == MONO_TYPE_VALUETYPE &&
6412 !type->data.klass->enumtype) || (type->type == MONO_TYPE_TYPEDBYREF) ||
6413 ((type->type == MONO_TYPE_GENERICINST) &&
6414 mono_metadata_generic_class_is_valuetype (type->data.generic_class) &&
6415 !type->data.generic_class->container_class->enumtype)));
6416 }
6417
6418 /**
6419 * mono_type_is_void:
6420 * @type: the MonoType operated on
6421 *
6422 * Returns: #TRUE is @type is System.Void. #FALSE otherwise.
6423 */
6424 mono_bool
6425 mono_type_is_void (MonoType *type)
6426 {
6427 return (type && (type->type == MONO_TYPE_VOID) && !type->byref);
6428 }
6429
6430 /**
6431 * mono_type_is_pointer:
6432 * @type: the MonoType operated on
6433 *
6434 * Returns: #TRUE is @type is a managed or unmanaged pointer type. #FALSE otherwise.
6435 */
6436 mono_bool
6437 mono_type_is_pointer (MonoType *type)
6438 {
6439 return (type && ((type->byref || (type->type == MONO_TYPE_I) || type->type == MONO_TYPE_STRING)
6440 || (type->type == MONO_TYPE_SZARRAY) || (type->type == MONO_TYPE_CLASS) ||
6441 (type->type == MONO_TYPE_U) || (type->type == MONO_TYPE_OBJECT) ||
6442 (type->type == MONO_TYPE_ARRAY) || (type->type == MONO_TYPE_PTR) ||
6443 (type->type == MONO_TYPE_FNPTR)));
6444 }
6445
6446 /**
6447 * mono_type_is_reference:
6448 * @type: the MonoType operated on
6449 *
6450 * Returns: #TRUE is @type represents an object reference . #FALSE otherwise.
6451 */
6452 mono_bool
6453 mono_type_is_reference (MonoType *type)
6454 {
6455 return (type && (((type->type == MONO_TYPE_STRING) ||
6456 (type->type == MONO_TYPE_SZARRAY) || (type->type == MONO_TYPE_CLASS) ||
6457 (type->type == MONO_TYPE_OBJECT) || (type->type == MONO_TYPE_ARRAY)) ||
6458 ((type->type == MONO_TYPE_GENERICINST) &&
6459 !mono_metadata_generic_class_is_valuetype (type->data.generic_class))));
6460 }
6461
6462 mono_bool
6463 mono_type_is_generic_parameter (MonoType *type)
6464 {
6465 return !type->byref && (type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR);
6466 }
6467
6468 /**
6469 * mono_signature_get_return_type:
6470 * @sig: the method signature inspected
6471 *
6472 * Returns: the return type of the method signature @sig
6473 */
6474 MonoType*
6475 mono_signature_get_return_type (MonoMethodSignature *sig)
6476 {
6477 return sig->ret;
6478 }
6479
6480 /**
6481 * mono_signature_get_params:
6482 * @sig: the method signature inspected
6483 * #iter: pointer to an iterator
6484 *
6485 * Iterates over the parameters for the method signature @sig.
6486 * A void* pointer must be initualized to #NULL to start the iteration
6487 * and it's address is passed to this function repeteadly until it returns
6488 * #NULL.
6489 *
6490 * Returns: the next parameter type of the method signature @sig,
6491 * #NULL when finished.
6492 */
6493 MonoType*
6494 mono_signature_get_params (MonoMethodSignature *sig, gpointer *iter)
6495 {
6496 MonoType** type;
6497 if (!iter)
6498 return NULL;
6499 if (!*iter) {
6500 /* start from the first */
6501 if (sig->param_count) {
6502 *iter = &sig->params [0];
6503 return sig->params [0];
6504 } else {
6505 /* no method */
6506 return NULL;
6507 }
6508 }
6509 type = (MonoType **)*iter;
6510 type++;
6511 if (type < &sig->params [sig->param_count]) {
6512 *iter = type;
6513 return *type;
6514 }
6515 return NULL;
6516 }
6517
6518 /**
6519 * mono_signature_get_param_count:
6520 * @sig: the method signature inspected
6521 *
6522 * Returns: the number of parameters in the method signature @sig.
6523 */
6524 guint32
6525 mono_signature_get_param_count (MonoMethodSignature *sig)
6526 {
6527 return sig->param_count;
6528 }
6529
6530 /**
6531 * mono_signature_get_call_conv:
6532 * @sig: the method signature inspected
6533 *
6534 * Returns: the call convention of the method signature @sig.
6535 */
6536 guint32
6537 mono_signature_get_call_conv (MonoMethodSignature *sig)
6538 {
6539 return sig->call_convention;
6540 }
6541
6542 /**
6543 * mono_signature_vararg_start:
6544 * @sig: the method signature inspected
6545 *
6546 * Returns: the number of the first vararg parameter in the
6547 * method signature @sig. -1 if this is not a vararg signature.
6548 */
6549 int
6550 mono_signature_vararg_start (MonoMethodSignature *sig)
6551 {
6552 return sig->sentinelpos;
6553 }
6554
6555 /**
6556 * mono_signature_is_instance:
6557 * @sig: the method signature inspected
6558 *
6559 * Returns: #TRUE if this the method signature @sig has an implicit
6560 * first instance argument. #FALSE otherwise.
6561 */
6562 gboolean
6563 mono_signature_is_instance (MonoMethodSignature *sig)
6564 {
6565 return sig->hasthis;
6566 }
6567
6568 /**
6569 * mono_signature_param_is_out
6570 * @sig: the method signature inspected
6571 * @param_num: the 0-based index of the inspected parameter
6572 *
6573 * Returns: #TRUE if the parameter is an out parameter, #FALSE
6574 * otherwise.
6575 */
6576 mono_bool
6577 mono_signature_param_is_out (MonoMethodSignature *sig, int param_num)
6578 {
6579 g_assert (param_num >= 0 && param_num < sig->param_count);
6580 return (sig->params [param_num]->attrs & PARAM_ATTRIBUTE_OUT) != 0;
6581 }
6582
6583 /**
6584 * mono_signature_explicit_this:
6585 * @sig: the method signature inspected
6586 *
6587 * Returns: #TRUE if this the method signature @sig has an explicit
6588 * instance argument. #FALSE otherwise.
6589 */
6590 gboolean
6591 mono_signature_explicit_this (MonoMethodSignature *sig)
6592 {
6593 return sig->explicit_this;
6594 }
6595
6596 /* for use with allocated memory blocks (assumes alignment is to 8 bytes) */
6597 guint
6598 mono_aligned_addr_hash (gconstpointer ptr)
6599 {
6600 return GPOINTER_TO_UINT (ptr) >> 3;
6601 }
6602
6603 /*
6604 * If @field belongs to an inflated generic class, return the corresponding field of the
6605 * generic type definition class.
6606 */
6607 MonoClassField*
6608 mono_metadata_get_corresponding_field_from_generic_type_definition (MonoClassField *field)
6609 {
6610 MonoClass *gtd;
6611 int offset;
6612
6613 if (!field->parent->generic_class)
6614 return field;
6615
6616 gtd = field->parent->generic_class->container_class;
6617 offset = field - field->parent->fields;
6618 return gtd->fields + offset;
6619 }
6620
6621 /*
6622 * If @event belongs to an inflated generic class, return the corresponding event of the
6623 * generic type definition class.
6624 */
6625 MonoEvent*
6626 mono_metadata_get_corresponding_event_from_generic_type_definition (MonoEvent *event)
6627 {
6628 MonoClass *gtd;
6629 int offset;
6630
6631 if (!event->parent->generic_class)
6632 return event;
6633
6634 gtd = event->parent->generic_class->container_class;
6635 offset = event - event->parent->ext->events;
6636 return gtd->ext->events + offset;
6637 }
6638
6639 /*
6640 * If @property belongs to an inflated generic class, return the corresponding property of the
6641 * generic type definition class.
6642 */
6643 MonoProperty*
6644 mono_metadata_get_corresponding_property_from_generic_type_definition (MonoProperty *property)
6645 {
6646 MonoClass *gtd;
6647 int offset;
6648
6649 if (!property->parent->generic_class)
6650 return property;
6651
6652 gtd = property->parent->generic_class->container_class;
6653 offset = property - property->parent->ext->properties;
6654 return gtd->ext->properties + offset;
6655 }
6656
6657 MonoWrapperCaches*
6658 mono_method_get_wrapper_cache (MonoMethod *method)
6659 {
6660 if (method->is_inflated) {
6661 MonoMethodInflated *imethod = (MonoMethodInflated *)method;
6662 return &imethod->owner->wrapper_caches;
6663 } else {
6664 return &method->klass->image->wrapper_caches;
6665 }
6666 }
6667
6668 // This is support for the mempool reference tracking feature in checked-build, but lives in metadata.c due to use of static variables of this file.
6669
6670 /**
6671 * mono_find_image_set_owner:
6672 *
6673 * Find the imageset, if any, which a given pointer is located in the memory of.
6674 */
6675 MonoImageSet *
6676 mono_find_image_set_owner (void *ptr)
6677 {
6678 MonoImageSet *owner = NULL;
6679 int i;
6680
6681 image_sets_lock ();
6682
6683 if (image_sets)
6684 {
6685 for (i = 0; !owner && i < image_sets->len; ++i) {
6686 MonoImageSet *set = (MonoImageSet *)g_ptr_array_index (image_sets, i);
6687 if (mono_mempool_contains_addr (set->mempool, ptr))
6688 owner = set;
6689 }
6690 }
6691
6692 image_sets_unlock ();
6693
6694 return owner;
6695 }
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