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Merge pull request #2202 from mono/revert-2090-mono-4.2.0-branch-bug25480
[mono-project.git] / mono / metadata / metadata.c
blob6d46ecf25a97325d707e95b3cfbf5345371446af
1 /*
2 * metadata.c: Routines for accessing the metadata
3 *
4 * Authors:
5 * Miguel de Icaza (miguel@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 *
8 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
9 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
10 */
11
12 #include <config.h>
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <glib.h>
17 #include "metadata.h"
18 #include "tabledefs.h"
19 #include "mono-endian.h"
20 #include "cil-coff.h"
21 #include "tokentype.h"
22 #include "metadata-internals.h"
23 #include "class-internals.h"
24 #include "verify-internals.h"
25 #include "class.h"
26 #include "marshal.h"
27 #include "debug-helpers.h"
28 #include "abi-details.h"
29 #include <mono/utils/mono-error-internals.h>
30 #include <mono/utils/bsearch.h>
31
32 /* Auxiliary structure used for caching inflated signatures */
33 typedef struct {
34 MonoMethodSignature *sig;
35 MonoGenericContext context;
36 } MonoInflatedMethodSignature;
37
38 static gboolean do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container, gboolean transient,
39 const char *ptr, const char **rptr);
40
41 static gboolean do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only);
42 static gboolean mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only);
43 static gboolean mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only);
44 static gboolean _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2,
45 gboolean signature_only);
46 static void free_generic_inst (MonoGenericInst *ginst);
47 static void free_generic_class (MonoGenericClass *ginst);
48 static void free_inflated_method (MonoMethodInflated *method);
49 static void free_inflated_signature (MonoInflatedMethodSignature *sig);
50 static void mono_metadata_field_info_full (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva, MonoMarshalSpec **marshal_spec, gboolean alloc_from_image);
51
52 /*
53 * This enumeration is used to describe the data types in the metadata
54 * tables
55 */
56 enum {
57 MONO_MT_END,
58
59 /* Sized elements */
60 MONO_MT_UINT32,
61 MONO_MT_UINT16,
62 MONO_MT_UINT8,
63
64 /* Index into Blob heap */
65 MONO_MT_BLOB_IDX,
66
67 /* Index into String heap */
68 MONO_MT_STRING_IDX,
69
70 /* GUID index */
71 MONO_MT_GUID_IDX,
72
73 /* Pointer into a table */
74 MONO_MT_TABLE_IDX,
75
76 /* HasConstant:Parent pointer (Param, Field or Property) */
77 MONO_MT_CONST_IDX,
78
79 /* HasCustomAttribute index. Indexes any table except CustomAttribute */
80 MONO_MT_HASCAT_IDX,
81
82 /* CustomAttributeType encoded index */
83 MONO_MT_CAT_IDX,
84
85 /* HasDeclSecurity index: TypeDef Method or Assembly */
86 MONO_MT_HASDEC_IDX,
87
88 /* Implementation coded index: File, Export AssemblyRef */
89 MONO_MT_IMPL_IDX,
90
91 /* HasFieldMarshal coded index: Field or Param table */
92 MONO_MT_HFM_IDX,
93
94 /* MemberForwardedIndex: Field or Method */
95 MONO_MT_MF_IDX,
96
97 /* TypeDefOrRef coded index: typedef, typeref, typespec */
98 MONO_MT_TDOR_IDX,
99
100 /* MemberRefParent coded index: typeref, moduleref, method, memberref, typesepc, typedef */
101 MONO_MT_MRP_IDX,
102
103 /* MethodDefOrRef coded index: Method or Member Ref table */
104 MONO_MT_MDOR_IDX,
105
106 /* HasSemantic coded index: Event or Property */
107 MONO_MT_HS_IDX,
108
109 /* ResolutionScope coded index: Module, ModuleRef, AssemblytRef, TypeRef */
110 MONO_MT_RS_IDX
111 };
112
113 const static unsigned char TableSchemas [] = {
114 #define ASSEMBLY_SCHEMA_OFFSET 0
115 MONO_MT_UINT32, /* "HashId" }, */
116 MONO_MT_UINT16, /* "Major" }, */
117 MONO_MT_UINT16, /* "Minor" }, */
118 MONO_MT_UINT16, /* "BuildNumber" }, */
119 MONO_MT_UINT16, /* "RevisionNumber" }, */
120 MONO_MT_UINT32, /* "Flags" }, */
121 MONO_MT_BLOB_IDX, /* "PublicKey" }, */
122 MONO_MT_STRING_IDX, /* "Name" }, */
123 MONO_MT_STRING_IDX, /* "Culture" }, */
124 MONO_MT_END,
125
126 #define ASSEMBLYOS_SCHEMA_OFFSET ASSEMBLY_SCHEMA_OFFSET + 10
127 MONO_MT_UINT32, /* "OSPlatformID" }, */
128 MONO_MT_UINT32, /* "OSMajor" }, */
129 MONO_MT_UINT32, /* "OSMinor" }, */
130 MONO_MT_END,
131
132 #define ASSEMBLYPROC_SCHEMA_OFFSET ASSEMBLYOS_SCHEMA_OFFSET + 4
133 MONO_MT_UINT32, /* "Processor" }, */
134 MONO_MT_END,
135
136 #define ASSEMBLYREF_SCHEMA_OFFSET ASSEMBLYPROC_SCHEMA_OFFSET + 2
137 MONO_MT_UINT16, /* "Major" }, */
138 MONO_MT_UINT16, /* "Minor" }, */
139 MONO_MT_UINT16, /* "Build" }, */
140 MONO_MT_UINT16, /* "Revision" }, */
141 MONO_MT_UINT32, /* "Flags" }, */
142 MONO_MT_BLOB_IDX, /* "PublicKeyOrToken" }, */
143 MONO_MT_STRING_IDX, /* "Name" }, */
144 MONO_MT_STRING_IDX, /* "Culture" }, */
145 MONO_MT_BLOB_IDX, /* "HashValue" }, */
146 MONO_MT_END,
147
148 #define ASSEMBLYREFOS_SCHEMA_OFFSET ASSEMBLYREF_SCHEMA_OFFSET + 10
149 MONO_MT_UINT32, /* "OSPlatformID" }, */
150 MONO_MT_UINT32, /* "OSMajorVersion" }, */
151 MONO_MT_UINT32, /* "OSMinorVersion" }, */
152 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
153 MONO_MT_END,
154
155 #define ASSEMBLYREFPROC_SCHEMA_OFFSET ASSEMBLYREFOS_SCHEMA_OFFSET + 5
156 MONO_MT_UINT32, /* "Processor" }, */
157 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
158 MONO_MT_END,
159
160 #define CLASS_LAYOUT_SCHEMA_OFFSET ASSEMBLYREFPROC_SCHEMA_OFFSET + 3
161 MONO_MT_UINT16, /* "PackingSize" }, */
162 MONO_MT_UINT32, /* "ClassSize" }, */
163 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
164 MONO_MT_END,
165
166 #define CONSTANT_SCHEMA_OFFSET CLASS_LAYOUT_SCHEMA_OFFSET + 4
167 MONO_MT_UINT8, /* "Type" }, */
168 MONO_MT_UINT8, /* "PaddingZero" }, */
169 MONO_MT_CONST_IDX, /* "Parent" }, */
170 MONO_MT_BLOB_IDX, /* "Value" }, */
171 MONO_MT_END,
172
173 #define CUSTOM_ATTR_SCHEMA_OFFSET CONSTANT_SCHEMA_OFFSET + 5
174 MONO_MT_HASCAT_IDX, /* "Parent" }, */
175 MONO_MT_CAT_IDX, /* "Type" }, */
176 MONO_MT_BLOB_IDX, /* "Value" }, */
177 MONO_MT_END,
178
179 #define DECL_SEC_SCHEMA_OFFSET CUSTOM_ATTR_SCHEMA_OFFSET + 4
180 MONO_MT_UINT16, /* "Action" }, */
181 MONO_MT_HASDEC_IDX, /* "Parent" }, */
182 MONO_MT_BLOB_IDX, /* "PermissionSet" }, */
183 MONO_MT_END,
184
185 #define EVENTMAP_SCHEMA_OFFSET DECL_SEC_SCHEMA_OFFSET + 4
186 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
187 MONO_MT_TABLE_IDX, /* "EventList:Event" }, */
188 MONO_MT_END,
189
190 #define EVENT_SCHEMA_OFFSET EVENTMAP_SCHEMA_OFFSET + 3
191 MONO_MT_UINT16, /* "EventFlags#EventAttribute" }, */
192 MONO_MT_STRING_IDX, /* "Name" }, */
193 MONO_MT_TDOR_IDX, /* "EventType" }, TypeDef or TypeRef or TypeSpec */
194 MONO_MT_END,
195
196 #define EVENT_POINTER_SCHEMA_OFFSET EVENT_SCHEMA_OFFSET + 4
197 MONO_MT_TABLE_IDX, /* "Event" }, */
198 MONO_MT_END,
199
200 #define EXPORTED_TYPE_SCHEMA_OFFSET EVENT_POINTER_SCHEMA_OFFSET + 2
201 MONO_MT_UINT32, /* "Flags" }, */
202 MONO_MT_TABLE_IDX, /* "TypeDefId" }, */
203 MONO_MT_STRING_IDX, /* "TypeName" }, */
204 MONO_MT_STRING_IDX, /* "TypeNameSpace" }, */
205 MONO_MT_IMPL_IDX, /* "Implementation" }, */
206 MONO_MT_END,
207
208 #define FIELD_SCHEMA_OFFSET EXPORTED_TYPE_SCHEMA_OFFSET + 6
209 MONO_MT_UINT16, /* "Flags" }, */
210 MONO_MT_STRING_IDX, /* "Name" }, */
211 MONO_MT_BLOB_IDX, /* "Signature" }, */
212 MONO_MT_END,
213
214 #define FIELD_LAYOUT_SCHEMA_OFFSET FIELD_SCHEMA_OFFSET + 4
215 MONO_MT_UINT32, /* "Offset" }, */
216 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
217 MONO_MT_END,
218
219 #define FIELD_MARSHAL_SCHEMA_OFFSET FIELD_LAYOUT_SCHEMA_OFFSET + 3
220 MONO_MT_HFM_IDX, /* "Parent" }, */
221 MONO_MT_BLOB_IDX, /* "NativeType" }, */
222 MONO_MT_END,
223
224 #define FIELD_RVA_SCHEMA_OFFSET FIELD_MARSHAL_SCHEMA_OFFSET + 3
225 MONO_MT_UINT32, /* "RVA" }, */
226 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
227 MONO_MT_END,
228
229 #define FIELD_POINTER_SCHEMA_OFFSET FIELD_RVA_SCHEMA_OFFSET + 3
230 MONO_MT_TABLE_IDX, /* "Field" }, */
231 MONO_MT_END,
232
233 #define FILE_SCHEMA_OFFSET FIELD_POINTER_SCHEMA_OFFSET + 2
234 MONO_MT_UINT32, /* "Flags" }, */
235 MONO_MT_STRING_IDX, /* "Name" }, */
236 MONO_MT_BLOB_IDX, /* "Value" }, */
237 MONO_MT_END,
238
239 #define IMPLMAP_SCHEMA_OFFSET FILE_SCHEMA_OFFSET + 4
240 MONO_MT_UINT16, /* "MappingFlag" }, */
241 MONO_MT_MF_IDX, /* "MemberForwarded" }, */
242 MONO_MT_STRING_IDX, /* "ImportName" }, */
243 MONO_MT_TABLE_IDX, /* "ImportScope:ModuleRef" }, */
244 MONO_MT_END,
245
246 #define IFACEMAP_SCHEMA_OFFSET IMPLMAP_SCHEMA_OFFSET + 5
247 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
248 MONO_MT_TDOR_IDX, /* "Interface=TypeDefOrRef" }, */
249 MONO_MT_END,
250
251 #define MANIFEST_SCHEMA_OFFSET IFACEMAP_SCHEMA_OFFSET + 3
252 MONO_MT_UINT32, /* "Offset" }, */
253 MONO_MT_UINT32, /* "Flags" }, */
254 MONO_MT_STRING_IDX, /* "Name" }, */
255 MONO_MT_IMPL_IDX, /* "Implementation" }, */
256 MONO_MT_END,
257
258 #define MEMBERREF_SCHEMA_OFFSET MANIFEST_SCHEMA_OFFSET + 5
259 MONO_MT_MRP_IDX, /* "Class" }, */
260 MONO_MT_STRING_IDX, /* "Name" }, */
261 MONO_MT_BLOB_IDX, /* "Signature" }, */
262 MONO_MT_END,
263
264 #define METHOD_SCHEMA_OFFSET MEMBERREF_SCHEMA_OFFSET + 4
265 MONO_MT_UINT32, /* "RVA" }, */
266 MONO_MT_UINT16, /* "ImplFlags#MethodImplAttributes" }, */
267 MONO_MT_UINT16, /* "Flags#MethodAttribute" }, */
268 MONO_MT_STRING_IDX, /* "Name" }, */
269 MONO_MT_BLOB_IDX, /* "Signature" }, */
270 MONO_MT_TABLE_IDX, /* "ParamList:Param" }, */
271 MONO_MT_END,
272
273 #define METHOD_IMPL_SCHEMA_OFFSET METHOD_SCHEMA_OFFSET + 7
274 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
275 MONO_MT_MDOR_IDX, /* "MethodBody" }, */
276 MONO_MT_MDOR_IDX, /* "MethodDeclaration" }, */
277 MONO_MT_END,
278
279 #define METHOD_SEMA_SCHEMA_OFFSET METHOD_IMPL_SCHEMA_OFFSET + 4
280 MONO_MT_UINT16, /* "MethodSemantic" }, */
281 MONO_MT_TABLE_IDX, /* "Method:Method" }, */
282 MONO_MT_HS_IDX, /* "Association" }, */
283 MONO_MT_END,
284
285 #define METHOD_POINTER_SCHEMA_OFFSET METHOD_SEMA_SCHEMA_OFFSET + 4
286 MONO_MT_TABLE_IDX, /* "Method" }, */
287 MONO_MT_END,
288
289 #define MODULE_SCHEMA_OFFSET METHOD_POINTER_SCHEMA_OFFSET + 2
290 MONO_MT_UINT16, /* "Generation" }, */
291 MONO_MT_STRING_IDX, /* "Name" }, */
292 MONO_MT_GUID_IDX, /* "MVID" }, */
293 MONO_MT_GUID_IDX, /* "EncID" }, */
294 MONO_MT_GUID_IDX, /* "EncBaseID" }, */
295 MONO_MT_END,
296
297 #define MODULEREF_SCHEMA_OFFSET MODULE_SCHEMA_OFFSET + 6
298 MONO_MT_STRING_IDX, /* "Name" }, */
299 MONO_MT_END,
300
301 #define NESTED_CLASS_SCHEMA_OFFSET MODULEREF_SCHEMA_OFFSET + 2
302 MONO_MT_TABLE_IDX, /* "NestedClass:TypeDef" }, */
303 MONO_MT_TABLE_IDX, /* "EnclosingClass:TypeDef" }, */
304 MONO_MT_END,
305
306 #define PARAM_SCHEMA_OFFSET NESTED_CLASS_SCHEMA_OFFSET + 3
307 MONO_MT_UINT16, /* "Flags" }, */
308 MONO_MT_UINT16, /* "Sequence" }, */
309 MONO_MT_STRING_IDX, /* "Name" }, */
310 MONO_MT_END,
311
312 #define PARAM_POINTER_SCHEMA_OFFSET PARAM_SCHEMA_OFFSET + 4
313 MONO_MT_TABLE_IDX, /* "Param" }, */
314 MONO_MT_END,
315
316 #define PROPERTY_SCHEMA_OFFSET PARAM_POINTER_SCHEMA_OFFSET + 2
317 MONO_MT_UINT16, /* "Flags" }, */
318 MONO_MT_STRING_IDX, /* "Name" }, */
319 MONO_MT_BLOB_IDX, /* "Type" }, */
320 MONO_MT_END,
321
322 #define PROPERTY_POINTER_SCHEMA_OFFSET PROPERTY_SCHEMA_OFFSET + 4
323 MONO_MT_TABLE_IDX, /* "Property" }, */
324 MONO_MT_END,
325
326 #define PROPERTY_MAP_SCHEMA_OFFSET PROPERTY_POINTER_SCHEMA_OFFSET + 2
327 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
328 MONO_MT_TABLE_IDX, /* "PropertyList:Property" }, */
329 MONO_MT_END,
330
331 #define STDALON_SIG_SCHEMA_OFFSET PROPERTY_MAP_SCHEMA_OFFSET + 3
332 MONO_MT_BLOB_IDX, /* "Signature" }, */
333 MONO_MT_END,
334
335 #define TYPEDEF_SCHEMA_OFFSET STDALON_SIG_SCHEMA_OFFSET + 2
336 MONO_MT_UINT32, /* "Flags" }, */
337 MONO_MT_STRING_IDX, /* "Name" }, */
338 MONO_MT_STRING_IDX, /* "Namespace" }, */
339 MONO_MT_TDOR_IDX, /* "Extends" }, */
340 MONO_MT_TABLE_IDX, /* "FieldList:Field" }, */
341 MONO_MT_TABLE_IDX, /* "MethodList:Method" }, */
342 MONO_MT_END,
343
344 #define TYPEREF_SCHEMA_OFFSET TYPEDEF_SCHEMA_OFFSET + 7
345 MONO_MT_RS_IDX, /* "ResolutionScope=ResolutionScope" }, */
346 MONO_MT_STRING_IDX, /* "Name" }, */
347 MONO_MT_STRING_IDX, /* "Namespace" }, */
348 MONO_MT_END,
349
350 #define TYPESPEC_SCHEMA_OFFSET TYPEREF_SCHEMA_OFFSET + 4
351 MONO_MT_BLOB_IDX, /* "Signature" }, */
352 MONO_MT_END,
353
354 #define GENPARAM_SCHEMA_OFFSET TYPESPEC_SCHEMA_OFFSET + 2
355 MONO_MT_UINT16, /* "Number" }, */
356 MONO_MT_UINT16, /* "Flags" }, */
357 MONO_MT_TABLE_IDX, /* "Owner" }, TypeDef or MethodDef */
358 MONO_MT_STRING_IDX, /* "Name" }, */
359 MONO_MT_END,
360
361 #define METHOD_SPEC_SCHEMA_OFFSET GENPARAM_SCHEMA_OFFSET + 5
362 MONO_MT_MDOR_IDX, /* "Method" }, */
363 MONO_MT_BLOB_IDX, /* "Signature" }, */
364 MONO_MT_END,
365
366 #define GEN_CONSTRAINT_SCHEMA_OFFSET METHOD_SPEC_SCHEMA_OFFSET + 3
367 MONO_MT_TABLE_IDX, /* "GenericParam" }, */
368 MONO_MT_TDOR_IDX, /* "Constraint" }, */
369 MONO_MT_END,
370
371 #define DOCUMENT_SCHEMA_OFFSET GEN_CONSTRAINT_SCHEMA_OFFSET + 3
372 MONO_MT_BLOB_IDX, /* Name */
373 MONO_MT_GUID_IDX, /* HashAlgorithm */
374 MONO_MT_BLOB_IDX, /* Hash */
375 MONO_MT_GUID_IDX, /* Language */
376 MONO_MT_END,
377
378 #define METHODBODY_SCHEMA_OFFSET DOCUMENT_SCHEMA_OFFSET + 5
379 MONO_MT_BLOB_IDX, /* SequencePoints */
380 MONO_MT_END,
381
382 #define LOCALSCOPE_SCHEMA_OFFSET METHODBODY_SCHEMA_OFFSET + 2
383 MONO_MT_TABLE_IDX, /* Method */
384 MONO_MT_TABLE_IDX, /* ImportScope */
385 MONO_MT_TABLE_IDX, /* VariableList */
386 MONO_MT_TABLE_IDX, /* ConstantList */
387 MONO_MT_UINT32, /* StartOffset */
388 MONO_MT_UINT32, /* Length */
389 MONO_MT_END,
390
391 #define LOCALVARIABLE_SCHEMA_OFFSET LOCALSCOPE_SCHEMA_OFFSET + 7
392 MONO_MT_UINT16, /* Attributes */
393 MONO_MT_UINT16, /* Index */
394 MONO_MT_STRING_IDX, /* Name */
395 MONO_MT_END,
396
397 #define NULL_SCHEMA_OFFSET LOCALVARIABLE_SCHEMA_OFFSET + 4
398 MONO_MT_END
399 };
400
401 /* Must be the same order as MONO_TABLE_* */
402 const static unsigned char
403 table_description [] = {
404 MODULE_SCHEMA_OFFSET,
405 TYPEREF_SCHEMA_OFFSET,
406 TYPEDEF_SCHEMA_OFFSET,
407 FIELD_POINTER_SCHEMA_OFFSET,
408 FIELD_SCHEMA_OFFSET,
409 METHOD_POINTER_SCHEMA_OFFSET,
410 METHOD_SCHEMA_OFFSET,
411 PARAM_POINTER_SCHEMA_OFFSET,
412 PARAM_SCHEMA_OFFSET,
413 IFACEMAP_SCHEMA_OFFSET,
414 MEMBERREF_SCHEMA_OFFSET, /* 0xa */
415 CONSTANT_SCHEMA_OFFSET,
416 CUSTOM_ATTR_SCHEMA_OFFSET,
417 FIELD_MARSHAL_SCHEMA_OFFSET,
418 DECL_SEC_SCHEMA_OFFSET,
419 CLASS_LAYOUT_SCHEMA_OFFSET,
420 FIELD_LAYOUT_SCHEMA_OFFSET, /* 0x10 */
421 STDALON_SIG_SCHEMA_OFFSET,
422 EVENTMAP_SCHEMA_OFFSET,
423 EVENT_POINTER_SCHEMA_OFFSET,
424 EVENT_SCHEMA_OFFSET,
425 PROPERTY_MAP_SCHEMA_OFFSET,
426 PROPERTY_POINTER_SCHEMA_OFFSET,
427 PROPERTY_SCHEMA_OFFSET,
428 METHOD_SEMA_SCHEMA_OFFSET,
429 METHOD_IMPL_SCHEMA_OFFSET,
430 MODULEREF_SCHEMA_OFFSET, /* 0x1a */
431 TYPESPEC_SCHEMA_OFFSET,
432 IMPLMAP_SCHEMA_OFFSET,
433 FIELD_RVA_SCHEMA_OFFSET,
434 NULL_SCHEMA_OFFSET,
435 NULL_SCHEMA_OFFSET,
436 ASSEMBLY_SCHEMA_OFFSET, /* 0x20 */
437 ASSEMBLYPROC_SCHEMA_OFFSET,
438 ASSEMBLYOS_SCHEMA_OFFSET,
439 ASSEMBLYREF_SCHEMA_OFFSET,
440 ASSEMBLYREFPROC_SCHEMA_OFFSET,
441 ASSEMBLYREFOS_SCHEMA_OFFSET,
442 FILE_SCHEMA_OFFSET,
443 EXPORTED_TYPE_SCHEMA_OFFSET,
444 MANIFEST_SCHEMA_OFFSET,
445 NESTED_CLASS_SCHEMA_OFFSET,
446 GENPARAM_SCHEMA_OFFSET, /* 0x2a */
447 METHOD_SPEC_SCHEMA_OFFSET,
448 GEN_CONSTRAINT_SCHEMA_OFFSET,
449 NULL_SCHEMA_OFFSET,
450 NULL_SCHEMA_OFFSET,
451 NULL_SCHEMA_OFFSET,
452 DOCUMENT_SCHEMA_OFFSET, /* 0x30 */
453 METHODBODY_SCHEMA_OFFSET,
454 LOCALSCOPE_SCHEMA_OFFSET,
455 LOCALVARIABLE_SCHEMA_OFFSET
456 };
457
458 #ifdef HAVE_ARRAY_ELEM_INIT
459 #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
460 #define MSGSTRFIELD1(line) str##line
461 static const struct msgstr_t {
462 #define TABLEDEF(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
463 #include "mono/cil/tables.def"
464 #undef TABLEDEF
465 } tablestr = {
466 #define TABLEDEF(a,b) b,
467 #include "mono/cil/tables.def"
468 #undef TABLEDEF
469 };
470 static const gint16 tableidx [] = {
471 #define TABLEDEF(a,b) [a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
472 #include "mono/cil/tables.def"
473 #undef TABLEDEF
474 };
475
476 #else
477 #define TABLEDEF(a,b) b,
478 static const char* const
479 mono_tables_names [] = {
480 #include "mono/cil/tables.def"
481 NULL
482 };
483
484 #endif
485
486 /**
487 * mono_meta_table_name:
488 * @table: table index
489 *
490 * Returns the name of the given ECMA metadata logical format table
491 * as described in ECMA 335, Partition II, Section 22.
492 *
493 * Returns: the name for the @table index
494 */
495 const char *
496 mono_meta_table_name (int table)
497 {
498 if ((table < 0) || (table > MONO_TABLE_LAST))
499 return "";
500
501 #ifdef HAVE_ARRAY_ELEM_INIT
502 return (const char*)&tablestr + tableidx [table];
503 #else
504 return mono_tables_names [table];
505 #endif
506 }
507
508 /* The guy who wrote the spec for this should not be allowed near a
509 * computer again.
510
511 If e is a coded token(see clause 23.1.7) that points into table ti out of n possible tables t0, .. tn-1,
512 then it is stored as e << (log n) & tag{ t0, .. tn-1}[ ti] using 2 bytes if the maximum number of
513 rows of tables t0, ..tn-1, is less than 2^16 - (log n), and using 4 bytes otherwise. The family of
514 finite maps tag{ t0, ..tn-1} is defined below. Note that to decode a physical row, you need the
515 inverse of this mapping.
516
517 */
518 #define rtsize(meta,s,b) (((s) < (1 << (b)) ? 2 : 4))
519 #define idx_size(meta,tableidx) ((meta)->tables [(tableidx)].rows < 65536 ? 2 : 4)
520
521 /* Reference: Partition II - 23.2.6 */
522 /*
523 * mono_metadata_compute_size:
524 * @meta: metadata context
525 * @tableindex: metadata table number
526 * @result_bitfield: pointer to guint32 where to store additional info
527 *
528 * mono_metadata_compute_size() computes the lenght in bytes of a single
529 * row in a metadata table. The size of each column is encoded in the
530 * @result_bitfield return value along with the number of columns in the table.
531 * the resulting bitfield should be handed to the mono_metadata_table_size()
532 * and mono_metadata_table_count() macros.
533 * This is a Mono runtime internal only function.
534 */
535 int
536 mono_metadata_compute_size (MonoImage *meta, int tableindex, guint32 *result_bitfield)
537 {
538 guint32 bitfield = 0;
539 int size = 0, field_size = 0;
540 int i, n, code;
541 int shift = 0;
542 const unsigned char *description = TableSchemas + table_description [tableindex];
543
544 for (i = 0; (code = description [i]) != MONO_MT_END; i++){
545 switch (code){
546 case MONO_MT_UINT32:
547 field_size = 4; break;
548
549 case MONO_MT_UINT16:
550 field_size = 2; break;
551
552 case MONO_MT_UINT8:
553 field_size = 1; break;
554
555 case MONO_MT_BLOB_IDX:
556 field_size = meta->idx_blob_wide ? 4 : 2; break;
557
558 case MONO_MT_STRING_IDX:
559 field_size = meta->idx_string_wide ? 4 : 2; break;
560
561 case MONO_MT_GUID_IDX:
562 field_size = meta->idx_guid_wide ? 4 : 2; break;
563
564 case MONO_MT_TABLE_IDX:
565 /* Uhm, a table index can point to other tables besides the current one
566 * so, it's not correct to use the rowcount of the current table to
567 * get the size for this column - lupus
568 */
569 switch (tableindex) {
570 case MONO_TABLE_ASSEMBLYREFOS:
571 g_assert (i == 3);
572 field_size = idx_size (meta, MONO_TABLE_ASSEMBLYREF); break;
573 case MONO_TABLE_ASSEMBLYREFPROCESSOR:
574 g_assert (i == 1);
575 field_size = idx_size (meta, MONO_TABLE_ASSEMBLYREF); break;
576 case MONO_TABLE_CLASSLAYOUT:
577 g_assert (i == 2);
578 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
579 case MONO_TABLE_EVENTMAP:
580 g_assert (i == 0 || i == 1);
581 field_size = i ? idx_size (meta, MONO_TABLE_EVENT):
582 idx_size (meta, MONO_TABLE_TYPEDEF);
583 break;
584 case MONO_TABLE_EVENT_POINTER:
585 g_assert (i == 0);
586 field_size = idx_size (meta, MONO_TABLE_EVENT); break;
587 case MONO_TABLE_EXPORTEDTYPE:
588 g_assert (i == 1);
589 /* the index is in another metadata file, so it must be 4 */
590 field_size = 4; break;
591 case MONO_TABLE_FIELDLAYOUT:
592 g_assert (i == 1);
593 field_size = idx_size (meta, MONO_TABLE_FIELD); break;
594 case MONO_TABLE_FIELDRVA:
595 g_assert (i == 1);
596 field_size = idx_size (meta, MONO_TABLE_FIELD); break;
597 case MONO_TABLE_FIELD_POINTER:
598 g_assert (i == 0);
599 field_size = idx_size (meta, MONO_TABLE_FIELD); break;
600 case MONO_TABLE_IMPLMAP:
601 g_assert (i == 3);
602 field_size = idx_size (meta, MONO_TABLE_MODULEREF); break;
603 case MONO_TABLE_INTERFACEIMPL:
604 g_assert (i == 0);
605 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
606 case MONO_TABLE_METHOD:
607 g_assert (i == 5);
608 field_size = idx_size (meta, MONO_TABLE_PARAM); break;
609 case MONO_TABLE_METHODIMPL:
610 g_assert (i == 0);
611 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
612 case MONO_TABLE_METHODSEMANTICS:
613 g_assert (i == 1);
614 field_size = idx_size (meta, MONO_TABLE_METHOD); break;
615 case MONO_TABLE_METHOD_POINTER:
616 g_assert (i == 0);
617 field_size = idx_size (meta, MONO_TABLE_METHOD); break;
618 case MONO_TABLE_NESTEDCLASS:
619 g_assert (i == 0 || i == 1);
620 field_size = idx_size (meta, MONO_TABLE_TYPEDEF); break;
621 case MONO_TABLE_PARAM_POINTER:
622 g_assert (i == 0);
623 field_size = idx_size (meta, MONO_TABLE_PARAM); break;
624 case MONO_TABLE_PROPERTYMAP:
625 g_assert (i == 0 || i == 1);
626 field_size = i ? idx_size (meta, MONO_TABLE_PROPERTY):
627 idx_size (meta, MONO_TABLE_TYPEDEF);
628 break;
629 case MONO_TABLE_PROPERTY_POINTER:
630 g_assert (i == 0);
631 field_size = idx_size (meta, MONO_TABLE_PROPERTY); break;
632 case MONO_TABLE_TYPEDEF:
633 g_assert (i == 4 || i == 5);
634 field_size = i == 4 ? idx_size (meta, MONO_TABLE_FIELD):
635 idx_size (meta, MONO_TABLE_METHOD);
636 break;
637 case MONO_TABLE_GENERICPARAM:
638 g_assert (i == 2);
639 n = MAX (meta->tables [MONO_TABLE_METHOD].rows, meta->tables [MONO_TABLE_TYPEDEF].rows);
640 /*This is a coded token for 2 tables, so takes 1 bit */
641 field_size = rtsize (meta, n, 16 - MONO_TYPEORMETHOD_BITS);
642 break;
643 case MONO_TABLE_GENERICPARAMCONSTRAINT:
644 g_assert (i == 0);
645 field_size = idx_size (meta, MONO_TABLE_GENERICPARAM);
646 break;
647 case MONO_TABLE_LOCALSCOPE:
648 switch (i) {
649 case 0:
650 // FIXME: This table is in another file
651 field_size = idx_size (meta, MONO_TABLE_METHOD);
652 break;
653 case 1:
654 field_size = idx_size (meta, MONO_TABLE_IMPORTSCOPE);
655 break;
656 case 2:
657 field_size = idx_size (meta, MONO_TABLE_LOCALVARIABLE);
658 break;
659 case 3:
660 field_size = idx_size (meta, MONO_TABLE_LOCALCONSTANT);
661 break;
662 default:
663 g_assert_not_reached ();
664 break;
665 }
666 break;
667 default:
668 g_error ("Can't handle MONO_MT_TABLE_IDX for table %d element %d", tableindex, i);
669 }
670 break;
671
672 /*
673 * HasConstant: ParamDef, FieldDef, Property
674 */
675 case MONO_MT_CONST_IDX:
676 n = MAX (meta->tables [MONO_TABLE_PARAM].rows,
677 meta->tables [MONO_TABLE_FIELD].rows);
678 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
679
680 /* 2 bits to encode tag */
681 field_size = rtsize (meta, n, 16-2);
682 break;
683
684 /*
685 * HasCustomAttribute: points to any table but
686 * itself.
687 */
688 case MONO_MT_HASCAT_IDX:
689 /*
690 * We believe that since the signature and
691 * permission are indexing the Blob heap,
692 * we should consider the blob size first
693 */
694 /* I'm not a believer - lupus
695 if (meta->idx_blob_wide){
696 field_size = 4;
697 break;
698 }*/
699
700 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
701 meta->tables [MONO_TABLE_FIELD].rows);
702 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
703 n = MAX (n, meta->tables [MONO_TABLE_TYPEDEF].rows);
704 n = MAX (n, meta->tables [MONO_TABLE_PARAM].rows);
705 n = MAX (n, meta->tables [MONO_TABLE_INTERFACEIMPL].rows);
706 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
707 n = MAX (n, meta->tables [MONO_TABLE_MODULE].rows);
708 n = MAX (n, meta->tables [MONO_TABLE_DECLSECURITY].rows);
709 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
710 n = MAX (n, meta->tables [MONO_TABLE_EVENT].rows);
711 n = MAX (n, meta->tables [MONO_TABLE_STANDALONESIG].rows);
712 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
713 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
714 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
715 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
716 n = MAX (n, meta->tables [MONO_TABLE_FILE].rows);
717 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
718 n = MAX (n, meta->tables [MONO_TABLE_MANIFESTRESOURCE].rows);
719
720 /* 5 bits to encode */
721 field_size = rtsize (meta, n, 16-5);
722 break;
723
724 /*
725 * CustomAttributeType: TypeDef, TypeRef, MethodDef,
726 * MemberRef and String.
727 */
728 case MONO_MT_CAT_IDX:
729 /* String is a heap, if it is wide, we know the size */
730 /* See above, nope.
731 if (meta->idx_string_wide){
732 field_size = 4;
733 break;
734 }*/
735
736 n = MAX (meta->tables [MONO_TABLE_TYPEREF].rows,
737 meta->tables [MONO_TABLE_TYPEDEF].rows);
738 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
739 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
740
741 /* 3 bits to encode */
742 field_size = rtsize (meta, n, 16-3);
743 break;
744
745 /*
746 * HasDeclSecurity: Typedef, MethodDef, Assembly
747 */
748 case MONO_MT_HASDEC_IDX:
749 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
750 meta->tables [MONO_TABLE_METHOD].rows);
751 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
752
753 /* 2 bits to encode */
754 field_size = rtsize (meta, n, 16-2);
755 break;
756
757 /*
758 * Implementation: File, AssemblyRef, ExportedType
759 */
760 case MONO_MT_IMPL_IDX:
761 n = MAX (meta->tables [MONO_TABLE_FILE].rows,
762 meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
763 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
764
765 /* 2 bits to encode tag */
766 field_size = rtsize (meta, n, 16-2);
767 break;
768
769 /*
770 * HasFieldMarshall: FieldDef, ParamDef
771 */
772 case MONO_MT_HFM_IDX:
773 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
774 meta->tables [MONO_TABLE_PARAM].rows);
775
776 /* 1 bit used to encode tag */
777 field_size = rtsize (meta, n, 16-1);
778 break;
779
780 /*
781 * MemberForwarded: FieldDef, MethodDef
782 */
783 case MONO_MT_MF_IDX:
784 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
785 meta->tables [MONO_TABLE_METHOD].rows);
786
787 /* 1 bit used to encode tag */
788 field_size = rtsize (meta, n, 16-1);
789 break;
790
791 /*
792 * TypeDefOrRef: TypeDef, ParamDef, TypeSpec
793 * LAMESPEC
794 * It is TypeDef, _TypeRef_, TypeSpec, instead.
795 */
796 case MONO_MT_TDOR_IDX:
797 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
798 meta->tables [MONO_TABLE_TYPEREF].rows);
799 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
800
801 /* 2 bits to encode */
802 field_size = rtsize (meta, n, 16-2);
803 break;
804
805 /*
806 * MemberRefParent: TypeDef, TypeRef, MethodDef, ModuleRef, TypeSpec, MemberRef
807 */
808 case MONO_MT_MRP_IDX:
809 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
810 meta->tables [MONO_TABLE_TYPEREF].rows);
811 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
812 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
813 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
814
815 /* 3 bits to encode */
816 field_size = rtsize (meta, n, 16 - 3);
817 break;
818
819 /*
820 * MethodDefOrRef: MethodDef, MemberRef
821 */
822 case MONO_MT_MDOR_IDX:
823 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
824 meta->tables [MONO_TABLE_MEMBERREF].rows);
825
826 /* 1 bit used to encode tag */
827 field_size = rtsize (meta, n, 16-1);
828 break;
829
830 /*
831 * HasSemantics: Property, Event
832 */
833 case MONO_MT_HS_IDX:
834 n = MAX (meta->tables [MONO_TABLE_PROPERTY].rows,
835 meta->tables [MONO_TABLE_EVENT].rows);
836
837 /* 1 bit used to encode tag */
838 field_size = rtsize (meta, n, 16-1);
839 break;
840
841 /*
842 * ResolutionScope: Module, ModuleRef, AssemblyRef, TypeRef
843 */
844 case MONO_MT_RS_IDX:
845 n = MAX (meta->tables [MONO_TABLE_MODULE].rows,
846 meta->tables [MONO_TABLE_MODULEREF].rows);
847 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
848 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
849
850 /* 2 bits used to encode tag (ECMA spec claims 3) */
851 field_size = rtsize (meta, n, 16 - 2);
852 break;
853 }
854
855 /*
856 * encode field size as follows (we just need to
857 * distinguish them).
858 *
859 * 4 -> 3
860 * 2 -> 1
861 * 1 -> 0
862 */
863 bitfield |= (field_size-1) << shift;
864 shift += 2;
865 size += field_size;
866 /*g_print ("table %02x field %d size %d\n", tableindex, i, field_size);*/
867 }
868
869 *result_bitfield = (i << 24) | bitfield;
870 return size;
871 }
872
873 /**
874 * mono_metadata_compute_table_bases:
875 * @meta: metadata context to compute table values
876 *
877 * Computes the table bases for the metadata structure.
878 * This is an internal function used by the image loader code.
879 */
880 void
881 mono_metadata_compute_table_bases (MonoImage *meta)
882 {
883 int i;
884 const char *base = meta->tables_base;
885
886 for (i = 0; i < MONO_TABLE_NUM; i++) {
887 MonoTableInfo *table = &meta->tables [i];
888 if (table->rows == 0)
889 continue;
890
891 table->row_size = mono_metadata_compute_size (meta, i, &table->size_bitfield);
892 table->base = base;
893 base += table->rows * table->row_size;
894 }
895 }
896
897 /**
898 * mono_metadata_locate:
899 * @meta: metadata context
900 * @table: table code.
901 * @idx: index of element to retrieve from @table.
902 *
903 * Returns: a pointer to the @idx element in the metadata table
904 * whose code is @table.
905 */
906 const char *
907 mono_metadata_locate (MonoImage *meta, int table, int idx)
908 {
909 /* idx == 0 refers always to NULL */
910 g_return_val_if_fail (idx > 0 && idx <= meta->tables [table].rows, ""); /*FIXME shouldn't we return NULL here?*/
911
912 return meta->tables [table].base + (meta->tables [table].row_size * (idx - 1));
913 }
914
915 /**
916 * mono_metadata_locate_token:
917 * @meta: metadata context
918 * @token: metadata token
919 *
920 * Returns: a pointer to the data in the metadata represented by the
921 * token #token.
922 */
923 const char *
924 mono_metadata_locate_token (MonoImage *meta, guint32 token)
925 {
926 return mono_metadata_locate (meta, token >> 24, token & 0xffffff);
927 }
928
929 /**
930 * mono_metadata_string_heap:
931 * @meta: metadata context
932 * @index: index into the string heap.
933 *
934 * Returns: an in-memory pointer to the @index in the string heap.
935 */
936 const char *
937 mono_metadata_string_heap (MonoImage *meta, guint32 index)
938 {
939 g_assert (index < meta->heap_strings.size);
940 g_return_val_if_fail (index < meta->heap_strings.size, "");
941 return meta->heap_strings.data + index;
942 }
943
944 /**
945 * mono_metadata_user_string:
946 * @meta: metadata context
947 * @index: index into the user string heap.
948 *
949 * Returns: an in-memory pointer to the @index in the user string heap ("#US").
950 */
951 const char *
952 mono_metadata_user_string (MonoImage *meta, guint32 index)
953 {
954 g_assert (index < meta->heap_us.size);
955 g_return_val_if_fail (index < meta->heap_us.size, "");
956 return meta->heap_us.data + index;
957 }
958
959 /**
960 * mono_metadata_blob_heap:
961 * @meta: metadata context
962 * @index: index into the blob.
963 *
964 * Returns: an in-memory pointer to the @index in the Blob heap.
965 */
966 const char *
967 mono_metadata_blob_heap (MonoImage *meta, guint32 index)
968 {
969 g_assert (index < meta->heap_blob.size);
970 g_return_val_if_fail (index < meta->heap_blob.size, "");/*FIXME shouldn't we return NULL and check for index == 0?*/
971 return meta->heap_blob.data + index;
972 }
973
974 /**
975 * mono_metadata_guid_heap:
976 * @meta: metadata context
977 * @index: index into the guid heap.
978 *
979 * Returns: an in-memory pointer to the @index in the guid heap.
980 */
981 const char *
982 mono_metadata_guid_heap (MonoImage *meta, guint32 index)
983 {
984 --index;
985 index *= 16; /* adjust for guid size and 1-based index */
986 g_return_val_if_fail (index < meta->heap_guid.size, "");
987 return meta->heap_guid.data + index;
988 }
989
990 static const unsigned char *
991 dword_align (const unsigned char *ptr)
992 {
993 #if SIZEOF_VOID_P == 8
994 return (const unsigned char *) (((guint64) (ptr + 3)) & ~3);
995 #else
996 return (const unsigned char *) (((guint32) (ptr + 3)) & ~3);
997 #endif
998 }
999
1000 /**
1001 * mono_metadata_decode_row:
1002 * @t: table to extract information from.
1003 * @idx: index in table.
1004 * @res: array of @res_size cols to store the results in
1005 *
1006 * This decompresses the metadata element @idx in table @t
1007 * into the guint32 @res array that has res_size elements
1008 */
1009 void
1010 mono_metadata_decode_row (const MonoTableInfo *t, int idx, guint32 *res, int res_size)
1011 {
1012 guint32 bitfield = t->size_bitfield;
1013 int i, count = mono_metadata_table_count (bitfield);
1014 const char *data;
1015
1016 g_assert (idx < t->rows);
1017 g_assert (idx >= 0);
1018 data = t->base + idx * t->row_size;
1019
1020 g_assert (res_size == count);
1021
1022 for (i = 0; i < count; i++) {
1023 int n = mono_metadata_table_size (bitfield, i);
1024
1025 switch (n){
1026 case 1:
1027 res [i] = *data; break;
1028 case 2:
1029 res [i] = read16 (data); break;
1030 case 4:
1031 res [i] = read32 (data); break;
1032 default:
1033 g_assert_not_reached ();
1034 }
1035 data += n;
1036 }
1037 }
1038
1039 /**
1040 * mono_metadata_decode_row_col:
1041 * @t: table to extract information from.
1042 * @idx: index for row in table.
1043 * @col: column in the row.
1044 *
1045 * This function returns the value of column @col from the @idx
1046 * row in the table @t.
1047 */
1048 guint32
1049 mono_metadata_decode_row_col (const MonoTableInfo *t, int idx, guint col)
1050 {
1051 guint32 bitfield = t->size_bitfield;
1052 int i;
1053 register const char *data;
1054 register int n;
1055
1056 g_assert (idx < t->rows);
1057 g_assert (col < mono_metadata_table_count (bitfield));
1058 data = t->base + idx * t->row_size;
1059
1060 n = mono_metadata_table_size (bitfield, 0);
1061 for (i = 0; i < col; ++i) {
1062 data += n;
1063 n = mono_metadata_table_size (bitfield, i + 1);
1064 }
1065 switch (n) {
1066 case 1:
1067 return *data;
1068 case 2:
1069 return read16 (data);
1070 case 4:
1071 return read32 (data);
1072 default:
1073 g_assert_not_reached ();
1074 }
1075 return 0;
1076 }
1077
1078 /**
1079 * mono_metadata_decode_blob_size:
1080 * @ptr: pointer to a blob object
1081 * @rptr: the new position of the pointer
1082 *
1083 * This decodes a compressed size as described by 23.1.4 (a blob or user string object)
1084 *
1085 * Returns: the size of the blob object
1086 */
1087 guint32
1088 mono_metadata_decode_blob_size (const char *xptr, const char **rptr)
1089 {
1090 const unsigned char *ptr = (const unsigned char *)xptr;
1091 guint32 size;
1092
1093 if ((*ptr & 0x80) == 0){
1094 size = ptr [0] & 0x7f;
1095 ptr++;
1096 } else if ((*ptr & 0x40) == 0){
1097 size = ((ptr [0] & 0x3f) << 8) + ptr [1];
1098 ptr += 2;
1099 } else {
1100 size = ((ptr [0] & 0x1f) << 24) +
1101 (ptr [1] << 16) +
1102 (ptr [2] << 8) +
1103 ptr [3];
1104 ptr += 4;
1105 }
1106 if (rptr)
1107 *rptr = (char*)ptr;
1108 return size;
1109 }
1110
1111 /**
1112 * mono_metadata_decode_value:
1113 * @ptr: pointer to decode from
1114 * @rptr: the new position of the pointer
1115 *
1116 * This routine decompresses 32-bit values as specified in the "Blob and
1117 * Signature" section (22.2)
1118 *
1119 * Returns: the decoded value
1120 */
1121 guint32
1122 mono_metadata_decode_value (const char *_ptr, const char **rptr)
1123 {
1124 const unsigned char *ptr = (const unsigned char *) _ptr;
1125 unsigned char b = *ptr;
1126 guint32 len;
1127
1128 if ((b & 0x80) == 0){
1129 len = b;
1130 ++ptr;
1131 } else if ((b & 0x40) == 0){
1132 len = ((b & 0x3f) << 8 | ptr [1]);
1133 ptr += 2;
1134 } else {
1135 len = ((b & 0x1f) << 24) |
1136 (ptr [1] << 16) |
1137 (ptr [2] << 8) |
1138 ptr [3];
1139 ptr += 4;
1140 }
1141 if (rptr)
1142 *rptr = (char*)ptr;
1143
1144 return len;
1145 }
1146
1147 /**
1148 * mono_metadata_decode_signed_value:
1149 * @ptr: pointer to decode from
1150 * @rptr: the new position of the pointer
1151 *
1152 * This routine decompresses 32-bit signed values
1153 * (not specified in the spec)
1154 *
1155 * Returns: the decoded value
1156 */
1157 gint32
1158 mono_metadata_decode_signed_value (const char *ptr, const char **rptr)
1159 {
1160 guint32 uval = mono_metadata_decode_value (ptr, rptr);
1161 gint32 ival = uval >> 1;
1162 if (!(uval & 1))
1163 return ival;
1164 /* ival is a truncated 2's complement negative number. */
1165 if (ival < 0x40)
1166 /* 6 bits = 7 bits for compressed representation (top bit is '0') - 1 sign bit */
1167 return ival - 0x40;
1168 if (ival < 0x2000)
1169 /* 13 bits = 14 bits for compressed representation (top bits are '10') - 1 sign bit */
1170 return ival - 0x2000;
1171 if (ival < 0x10000000)
1172 /* 28 bits = 29 bits for compressed representation (top bits are '110') - 1 sign bit */
1173 return ival - 0x10000000;
1174 g_assert (ival < 0x20000000);
1175 g_warning ("compressed signed value appears to use 29 bits for compressed representation: %x (raw: %8x)", ival, uval);
1176 return ival - 0x20000000;
1177 }
1178
1179 /*
1180 * Translates the given 1-based index into the Method, Field, Event, or Param tables
1181 * using the *Ptr tables in uncompressed metadata, if they are available.
1182 *
1183 * FIXME: The caller is not forced to call this function, which is error-prone, since
1184 * forgetting to call it would only show up as a bug on uncompressed metadata.
1185 */
1186 guint32
1187 mono_metadata_translate_token_index (MonoImage *image, int table, guint32 idx)
1188 {
1189 if (!image->uncompressed_metadata)
1190 return idx;
1191
1192 switch (table) {
1193 case MONO_TABLE_METHOD:
1194 if (image->tables [MONO_TABLE_METHOD_POINTER].rows)
1195 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_METHOD_POINTER], idx - 1, MONO_METHOD_POINTER_METHOD);
1196 else
1197 return idx;
1198 case MONO_TABLE_FIELD:
1199 if (image->tables [MONO_TABLE_FIELD_POINTER].rows)
1200 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_FIELD_POINTER], idx - 1, MONO_FIELD_POINTER_FIELD);
1201 else
1202 return idx;
1203 case MONO_TABLE_EVENT:
1204 if (image->tables [MONO_TABLE_EVENT_POINTER].rows)
1205 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_EVENT_POINTER], idx - 1, MONO_EVENT_POINTER_EVENT);
1206 else
1207 return idx;
1208 case MONO_TABLE_PROPERTY:
1209 if (image->tables [MONO_TABLE_PROPERTY_POINTER].rows)
1210 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PROPERTY_POINTER], idx - 1, MONO_PROPERTY_POINTER_PROPERTY);
1211 else
1212 return idx;
1213 case MONO_TABLE_PARAM:
1214 if (image->tables [MONO_TABLE_PARAM_POINTER].rows)
1215 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PARAM_POINTER], idx - 1, MONO_PARAM_POINTER_PARAM);
1216 else
1217 return idx;
1218 default:
1219 return idx;
1220 }
1221 }
1222
1223 /**
1224 * mono_metadata_decode_table_row:
1225 *
1226 * Same as mono_metadata_decode_row, but takes an IMAGE+TABLE ID pair, and takes
1227 * uncompressed metadata into account, so it should be used to access the
1228 * Method, Field, Param and Event tables when the access is made from metadata, i.e.
1229 * IDX is retrieved from a metadata table, like MONO_TYPEDEF_FIELD_LIST.
1230 */
1231 void
1232 mono_metadata_decode_table_row (MonoImage *image, int table, int idx, guint32 *res, int res_size)
1233 {
1234 if (image->uncompressed_metadata)
1235 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1236
1237 mono_metadata_decode_row (&image->tables [table], idx, res, res_size);
1238 }
1239
1240 /**
1241 * mono_metadata_decode_table_row_col:
1242 *
1243 * Same as mono_metadata_decode_row_col, but takes an IMAGE+TABLE ID pair, and takes
1244 * uncompressed metadata into account, so it should be used to access the
1245 * Method, Field, Param and Event tables.
1246 */
1247 guint32 mono_metadata_decode_table_row_col (MonoImage *image, int table, int idx, guint col)
1248 {
1249 if (image->uncompressed_metadata)
1250 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1251
1252 return mono_metadata_decode_row_col (&image->tables [table], idx, col);
1253 }
1254
1255 /*
1256 * mono_metadata_parse_typedef_or_ref:
1257 * @m: a metadata context.
1258 * @ptr: a pointer to an encoded TypedefOrRef in @m
1259 * @rptr: pointer updated to match the end of the decoded stream
1260 *
1261 * Returns: a token valid in the @m metadata decoded from
1262 * the compressed representation.
1263 */
1264 guint32
1265 mono_metadata_parse_typedef_or_ref (MonoImage *m, const char *ptr, const char **rptr)
1266 {
1267 guint32 token;
1268 token = mono_metadata_decode_value (ptr, &ptr);
1269 if (rptr)
1270 *rptr = ptr;
1271 return mono_metadata_token_from_dor (token);
1272 }
1273
1274 /*
1275 * mono_metadata_parse_custom_mod:
1276 * @m: a metadata context.
1277 * @dest: storage where the info about the custom modifier is stored (may be NULL)
1278 * @ptr: a pointer to (possibly) the start of a custom modifier list
1279 * @rptr: pointer updated to match the end of the decoded stream
1280 *
1281 * Checks if @ptr points to a type custom modifier compressed representation.
1282 *
1283 * Returns: #TRUE if a custom modifier was found, #FALSE if not.
1284 */
1285 int
1286 mono_metadata_parse_custom_mod (MonoImage *m, MonoCustomMod *dest, const char *ptr, const char **rptr)
1287 {
1288 MonoCustomMod local;
1289 if ((*ptr == MONO_TYPE_CMOD_OPT) || (*ptr == MONO_TYPE_CMOD_REQD)) {
1290 if (!dest)
1291 dest = &local;
1292 dest->required = *ptr == MONO_TYPE_CMOD_REQD ? 1 : 0;
1293 dest->token = mono_metadata_parse_typedef_or_ref (m, ptr + 1, rptr);
1294 return TRUE;
1295 }
1296 return FALSE;
1297 }
1298
1299 /*
1300 * mono_metadata_parse_array_internal:
1301 * @m: a metadata context.
1302 * @transient: whenever to allocate data from the heap
1303 * @ptr: a pointer to an encoded array description.
1304 * @rptr: pointer updated to match the end of the decoded stream
1305 *
1306 * Decodes the compressed array description found in the metadata @m at @ptr.
1307 *
1308 * Returns: a #MonoArrayType structure describing the array type
1309 * and dimensions. Memory is allocated from the heap or from the image mempool, depending
1310 * on the value of @transient.
1311 *
1312 * LOCKING: Acquires the loader lock
1313 */
1314 static MonoArrayType *
1315 mono_metadata_parse_array_internal (MonoImage *m, MonoGenericContainer *container,
1316 gboolean transient, const char *ptr, const char **rptr)
1317 {
1318 int i;
1319 MonoArrayType *array;
1320 MonoType *etype;
1321
1322 array = transient ? g_malloc0 (sizeof (MonoArrayType)) : mono_image_alloc0 (m, sizeof (MonoArrayType));
1323 etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
1324 if (!etype)
1325 return NULL;
1326 array->eklass = mono_class_from_mono_type (etype);
1327 array->rank = mono_metadata_decode_value (ptr, &ptr);
1328
1329 array->numsizes = mono_metadata_decode_value (ptr, &ptr);
1330 if (array->numsizes)
1331 array->sizes = transient ? g_malloc0 (sizeof (int) * array->numsizes) : mono_image_alloc0 (m, sizeof (int) * array->numsizes);
1332 for (i = 0; i < array->numsizes; ++i)
1333 array->sizes [i] = mono_metadata_decode_value (ptr, &ptr);
1334
1335 array->numlobounds = mono_metadata_decode_value (ptr, &ptr);
1336 if (array->numlobounds)
1337 array->lobounds = transient ? g_malloc0 (sizeof (int) * array->numlobounds) : mono_image_alloc0 (m, sizeof (int) * array->numlobounds);
1338 for (i = 0; i < array->numlobounds; ++i)
1339 array->lobounds [i] = mono_metadata_decode_signed_value (ptr, &ptr);
1340
1341 if (rptr)
1342 *rptr = ptr;
1343 return array;
1344 }
1345
1346 MonoArrayType *
1347 mono_metadata_parse_array_full (MonoImage *m, MonoGenericContainer *container,
1348 const char *ptr, const char **rptr)
1349 {
1350 return mono_metadata_parse_array_internal (m, container, FALSE, ptr, rptr);
1351 }
1352
1353 MonoArrayType *
1354 mono_metadata_parse_array (MonoImage *m, const char *ptr, const char **rptr)
1355 {
1356 return mono_metadata_parse_array_full (m, NULL, ptr, rptr);
1357 }
1358
1359 /*
1360 * mono_metadata_free_array:
1361 * @array: array description
1362 *
1363 * Frees the array description returned from mono_metadata_parse_array().
1364 */
1365 void
1366 mono_metadata_free_array (MonoArrayType *array)
1367 {
1368 g_free (array->sizes);
1369 g_free (array->lobounds);
1370 g_free (array);
1371 }
1372
1373 /*
1374 * need to add common field and param attributes combinations:
1375 * [out] param
1376 * public static
1377 * public static literal
1378 * private
1379 * private static
1380 * private static literal
1381 */
1382 static const MonoType
1383 builtin_types[] = {
1384 /* data, attrs, type, nmods, byref, pinned */
1385 {{NULL}, 0, MONO_TYPE_VOID, 0, 0, 0},
1386 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 0, 0},
1387 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 1, 0},
1388 {{NULL}, 0, MONO_TYPE_CHAR, 0, 0, 0},
1389 {{NULL}, 0, MONO_TYPE_CHAR, 0, 1, 0},
1390 {{NULL}, 0, MONO_TYPE_I1, 0, 0, 0},
1391 {{NULL}, 0, MONO_TYPE_I1, 0, 1, 0},
1392 {{NULL}, 0, MONO_TYPE_U1, 0, 0, 0},
1393 {{NULL}, 0, MONO_TYPE_U1, 0, 1, 0},
1394 {{NULL}, 0, MONO_TYPE_I2, 0, 0, 0},
1395 {{NULL}, 0, MONO_TYPE_I2, 0, 1, 0},
1396 {{NULL}, 0, MONO_TYPE_U2, 0, 0, 0},
1397 {{NULL}, 0, MONO_TYPE_U2, 0, 1, 0},
1398 {{NULL}, 0, MONO_TYPE_I4, 0, 0, 0},
1399 {{NULL}, 0, MONO_TYPE_I4, 0, 1, 0},
1400 {{NULL}, 0, MONO_TYPE_U4, 0, 0, 0},
1401 {{NULL}, 0, MONO_TYPE_U4, 0, 1, 0},
1402 {{NULL}, 0, MONO_TYPE_I8, 0, 0, 0},
1403 {{NULL}, 0, MONO_TYPE_I8, 0, 1, 0},
1404 {{NULL}, 0, MONO_TYPE_U8, 0, 0, 0},
1405 {{NULL}, 0, MONO_TYPE_U8, 0, 1, 0},
1406 {{NULL}, 0, MONO_TYPE_R4, 0, 0, 0},
1407 {{NULL}, 0, MONO_TYPE_R4, 0, 1, 0},
1408 {{NULL}, 0, MONO_TYPE_R8, 0, 0, 0},
1409 {{NULL}, 0, MONO_TYPE_R8, 0, 1, 0},
1410 {{NULL}, 0, MONO_TYPE_STRING, 0, 0, 0},
1411 {{NULL}, 0, MONO_TYPE_STRING, 0, 1, 0},
1412 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 0, 0},
1413 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 1, 0},
1414 {{NULL}, 0, MONO_TYPE_TYPEDBYREF, 0, 0, 0},
1415 {{NULL}, 0, MONO_TYPE_I, 0, 0, 0},
1416 {{NULL}, 0, MONO_TYPE_I, 0, 1, 0},
1417 {{NULL}, 0, MONO_TYPE_U, 0, 0, 0},
1418 {{NULL}, 0, MONO_TYPE_U, 0, 1, 0},
1419 };
1420
1421 #define NBUILTIN_TYPES() (sizeof (builtin_types) / sizeof (builtin_types [0]))
1422
1423 static GHashTable *type_cache = NULL;
1424 static int next_generic_inst_id = 0;
1425
1426 /* Protected by image_sets_mutex */
1427 static MonoImageSet *mscorlib_image_set;
1428 /* Protected by image_sets_mutex */
1429 static GPtrArray *image_sets;
1430 static mono_mutex_t image_sets_mutex;
1431
1432 static guint mono_generic_class_hash (gconstpointer data);
1433
1434 /*
1435 * MonoTypes with modifies are never cached, so we never check or use that field.
1436 */
1437 static guint
1438 mono_type_hash (gconstpointer data)
1439 {
1440 const MonoType *type = (const MonoType *) data;
1441 if (type->type == MONO_TYPE_GENERICINST)
1442 return mono_generic_class_hash (type->data.generic_class);
1443 else
1444 return type->type | (type->byref << 8) | (type->attrs << 9);
1445 }
1446
1447 static gint
1448 mono_type_equal (gconstpointer ka, gconstpointer kb)
1449 {
1450 const MonoType *a = (const MonoType *) ka;
1451 const MonoType *b = (const MonoType *) kb;
1452
1453 if (a->type != b->type || a->byref != b->byref || a->attrs != b->attrs || a->pinned != b->pinned)
1454 return 0;
1455 /* need other checks */
1456 return 1;
1457 }
1458
1459 guint
1460 mono_metadata_generic_inst_hash (gconstpointer data)
1461 {
1462 const MonoGenericInst *ginst = (const MonoGenericInst *) data;
1463 guint hash = 0;
1464 int i;
1465
1466 for (i = 0; i < ginst->type_argc; ++i) {
1467 hash *= 13;
1468 hash += mono_metadata_type_hash (ginst->type_argv [i]);
1469 }
1470
1471 return hash ^ (ginst->is_open << 8);
1472 }
1473
1474 static gboolean
1475 mono_generic_inst_equal_full (const MonoGenericInst *a, const MonoGenericInst *b, gboolean signature_only)
1476 {
1477 int i;
1478
1479 #ifndef MONO_SMALL_CONFIG
1480 if (a->id && b->id) {
1481 if (a->id == b->id)
1482 return TRUE;
1483 if (!signature_only)
1484 return FALSE;
1485 }
1486 #endif
1487
1488 if (a->is_open != b->is_open || a->type_argc != b->type_argc)
1489 return FALSE;
1490 for (i = 0; i < a->type_argc; ++i) {
1491 if (!do_mono_metadata_type_equal (a->type_argv [i], b->type_argv [i], signature_only))
1492 return FALSE;
1493 }
1494 return TRUE;
1495 }
1496
1497 gboolean
1498 mono_metadata_generic_inst_equal (gconstpointer ka, gconstpointer kb)
1499 {
1500 const MonoGenericInst *a = (const MonoGenericInst *) ka;
1501 const MonoGenericInst *b = (const MonoGenericInst *) kb;
1502
1503 return mono_generic_inst_equal_full (a, b, FALSE);
1504 }
1505
1506 static guint
1507 mono_generic_class_hash (gconstpointer data)
1508 {
1509 const MonoGenericClass *gclass = (const MonoGenericClass *) data;
1510 guint hash = mono_metadata_type_hash (&gclass->container_class->byval_arg);
1511
1512 hash *= 13;
1513 hash += gclass->is_tb_open;
1514 hash += mono_metadata_generic_context_hash (&gclass->context);
1515
1516 return hash;
1517 }
1518
1519 static gboolean
1520 mono_generic_class_equal (gconstpointer ka, gconstpointer kb)
1521 {
1522 const MonoGenericClass *a = (const MonoGenericClass *) ka;
1523 const MonoGenericClass *b = (const MonoGenericClass *) kb;
1524
1525 return _mono_metadata_generic_class_equal (a, b, FALSE);
1526 }
1527
1528 /**
1529 * mono_metadata_init:
1530 *
1531 * Initialize the global variables of this module.
1532 * This is a Mono runtime internal function.
1533 */
1534 void
1535 mono_metadata_init (void)
1536 {
1537 int i;
1538
1539 type_cache = g_hash_table_new (mono_type_hash, mono_type_equal);
1540
1541 for (i = 0; i < NBUILTIN_TYPES (); ++i)
1542 g_hash_table_insert (type_cache, (gpointer) &builtin_types [i], (gpointer) &builtin_types [i]);
1543
1544 mono_mutex_init_recursive (&image_sets_mutex);
1545 }
1546
1547 /**
1548 * mono_metadata_cleanup:
1549 *
1550 * Free all resources used by this module.
1551 * This is a Mono runtime internal function.
1552 */
1553 void
1554 mono_metadata_cleanup (void)
1555 {
1556 g_hash_table_destroy (type_cache);
1557 type_cache = NULL;
1558 g_ptr_array_free (image_sets, TRUE);
1559 image_sets = NULL;
1560 mono_mutex_destroy (&image_sets_mutex);
1561 }
1562
1563 /**
1564 * mono_metadata_parse_type:
1565 * @m: metadata context
1566 * @mode: king of type that may be found at @ptr
1567 * @opt_attrs: optional attributes to store in the returned type
1568 * @ptr: pointer to the type representation
1569 * @rptr: pointer updated to match the end of the decoded stream
1570 * @transient: whenever to allocate the result from the heap or from a mempool
1571 *
1572 * Decode a compressed type description found at @ptr in @m.
1573 * @mode can be one of MONO_PARSE_MOD_TYPE, MONO_PARSE_PARAM, MONO_PARSE_RET,
1574 * MONO_PARSE_FIELD, MONO_PARSE_LOCAL, MONO_PARSE_TYPE.
1575 * This function can be used to decode type descriptions in method signatures,
1576 * field signatures, locals signatures etc.
1577 *
1578 * To parse a generic type, `generic_container' points to the current class'es
1579 * (the `generic_container' field in the MonoClass) or the current generic method's
1580 * (stored in image->property_hash) generic container.
1581 * When we encounter any MONO_TYPE_VAR or MONO_TYPE_MVAR's, they're looked up in
1582 * this MonoGenericContainer.
1583 *
1584 * LOCKING: Acquires the loader lock.
1585 *
1586 * Returns: a #MonoType structure representing the decoded type.
1587 */
1588 static MonoType*
1589 mono_metadata_parse_type_internal (MonoImage *m, MonoGenericContainer *container, MonoParseTypeMode mode,
1590 short opt_attrs, gboolean transient, const char *ptr, const char **rptr)
1591 {
1592 MonoType *type, *cached;
1593 MonoType stype;
1594 gboolean byref = FALSE;
1595 gboolean pinned = FALSE;
1596 const char *tmp_ptr;
1597 int count = 0;
1598 gboolean found;
1599
1600 /*
1601 * According to the spec, custom modifiers should come before the byref
1602 * flag, but the IL produced by ilasm from the following signature:
1603 * object modopt(...) &
1604 * starts with a byref flag, followed by the modifiers. (bug #49802)
1605 * Also, this type seems to be different from 'object & modopt(...)'. Maybe
1606 * it would be better to treat byref as real type constructor instead of
1607 * a modifier...
1608 * Also, pinned should come before anything else, but some MSV++ produced
1609 * assemblies violate this (#bug 61990).
1610 */
1611
1612 /* Count the modifiers first */
1613 tmp_ptr = ptr;
1614 found = TRUE;
1615 while (found) {
1616 switch (*tmp_ptr) {
1617 case MONO_TYPE_PINNED:
1618 case MONO_TYPE_BYREF:
1619 ++tmp_ptr;
1620 break;
1621 case MONO_TYPE_CMOD_REQD:
1622 case MONO_TYPE_CMOD_OPT:
1623 count ++;
1624 mono_metadata_parse_custom_mod (m, NULL, tmp_ptr, &tmp_ptr);
1625 break;
1626 default:
1627 found = FALSE;
1628 }
1629 }
1630
1631 if (count) {
1632 int size;
1633
1634 size = MONO_SIZEOF_TYPE + ((gint32)count) * sizeof (MonoCustomMod);
1635 type = transient ? g_malloc0 (size) : mono_image_alloc0 (m, size);
1636 type->num_mods = count;
1637 if (count > 64)
1638 g_warning ("got more than 64 modifiers in type");
1639 } else {
1640 type = &stype;
1641 memset (type, 0, MONO_SIZEOF_TYPE);
1642 }
1643
1644 /* Parse pinned, byref and custom modifiers */
1645 found = TRUE;
1646 count = 0;
1647 while (found) {
1648 switch (*ptr) {
1649 case MONO_TYPE_PINNED:
1650 pinned = TRUE;
1651 ++ptr;
1652 break;
1653 case MONO_TYPE_BYREF:
1654 byref = TRUE;
1655 ++ptr;
1656 break;
1657 case MONO_TYPE_CMOD_REQD:
1658 case MONO_TYPE_CMOD_OPT:
1659 mono_metadata_parse_custom_mod (m, &(type->modifiers [count]), ptr, &ptr);
1660 count ++;
1661 break;
1662 default:
1663 found = FALSE;
1664 }
1665 }
1666
1667 type->attrs = opt_attrs;
1668 type->byref = byref;
1669 type->pinned = pinned ? 1 : 0;
1670
1671 if (!do_mono_metadata_parse_type (type, m, container, transient, ptr, &ptr)) {
1672 return NULL;
1673 }
1674
1675 if (rptr)
1676 *rptr = ptr;
1677
1678 if (!type->num_mods && !transient) {
1679 /* no need to free type here, because it is on the stack */
1680 if ((type->type == MONO_TYPE_CLASS || type->type == MONO_TYPE_VALUETYPE) && !type->pinned && !type->attrs) {
1681 MonoType *ret = type->byref ? &type->data.klass->this_arg : &type->data.klass->byval_arg;
1682
1683 /* Consider the case:
1684
1685 class Foo<T> { class Bar {} }
1686 class Test : Foo<Test>.Bar {}
1687
1688 When Foo<Test> is being expanded, 'Test' isn't yet initialized. It's actually in
1689 a really pristine state: it doesn't even know whether 'Test' is a reference or a value type.
1690
1691 We ensure that the MonoClass is in a state that we can canonicalize to:
1692
1693 klass->byval_arg.data.klass == klass
1694 klass->this_arg.data.klass == klass
1695
1696 If we can't canonicalize 'type', it doesn't matter, since later users of 'type' will do it.
1697
1698 LOCKING: even though we don't explicitly hold a lock, in the problematic case 'ret' is a field
1699 of a MonoClass which currently holds the loader lock. 'type' is local.
1700 */
1701 if (ret->data.klass == type->data.klass) {
1702 return ret;
1703 }
1704 }
1705 /* No need to use locking since nobody is modifying the hash table */
1706 if ((cached = g_hash_table_lookup (type_cache, type))) {
1707 return cached;
1708 }
1709 }
1710
1711 /* printf ("%x %x %c %s\n", type->attrs, type->num_mods, type->pinned ? 'p' : ' ', mono_type_full_name (type)); */
1712
1713 if (type == &stype) {
1714 type = transient ? g_malloc (MONO_SIZEOF_TYPE) : mono_image_alloc (m, MONO_SIZEOF_TYPE);
1715 memcpy (type, &stype, MONO_SIZEOF_TYPE);
1716 }
1717 return type;
1718 }
1719
1720 MonoType*
1721 mono_metadata_parse_type_full (MonoImage *m, MonoGenericContainer *container, MonoParseTypeMode mode,
1722 short opt_attrs, const char *ptr, const char **rptr)
1723 {
1724 return mono_metadata_parse_type_internal (m, container, mode, opt_attrs, FALSE, ptr, rptr);
1725 }
1726
1727 /*
1728 * LOCKING: Acquires the loader lock.
1729 */
1730 MonoType*
1731 mono_metadata_parse_type (MonoImage *m, MonoParseTypeMode mode, short opt_attrs,
1732 const char *ptr, const char **rptr)
1733 {
1734 return mono_metadata_parse_type_full (m, NULL, mode, opt_attrs, ptr, rptr);
1735 }
1736
1737 gboolean
1738 mono_metadata_method_has_param_attrs (MonoImage *m, int def)
1739 {
1740 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1741 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1742 guint lastp, i, param_index = mono_metadata_decode_row_col (methodt, def - 1, MONO_METHOD_PARAMLIST);
1743
1744 if (def < methodt->rows)
1745 lastp = mono_metadata_decode_row_col (methodt, def, MONO_METHOD_PARAMLIST);
1746 else
1747 lastp = m->tables [MONO_TABLE_PARAM].rows + 1;
1748
1749 for (i = param_index; i < lastp; ++i) {
1750 guint32 flags = mono_metadata_decode_row_col (paramt, i - 1, MONO_PARAM_FLAGS);
1751 if (flags)
1752 return TRUE;
1753 }
1754
1755 return FALSE;
1756 }
1757
1758 /*
1759 * mono_metadata_get_param_attrs:
1760 *
1761 * @m The image to loader parameter attributes from
1762 * @def method def token (one based)
1763 * @param_count number of params to decode including the return value
1764 *
1765 * Return the parameter attributes for the method whose MethodDef index is DEF. The
1766 * returned memory needs to be freed by the caller. If all the param attributes are
1767 * 0, then NULL is returned.
1768 */
1769 int*
1770 mono_metadata_get_param_attrs (MonoImage *m, int def, int param_count)
1771 {
1772 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1773 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1774 guint32 cols [MONO_PARAM_SIZE];
1775 guint lastp, i, param_index = mono_metadata_decode_row_col (methodt, def - 1, MONO_METHOD_PARAMLIST);
1776 int *pattrs = NULL;
1777
1778 if (def < methodt->rows)
1779 lastp = mono_metadata_decode_row_col (methodt, def, MONO_METHOD_PARAMLIST);
1780 else
1781 lastp = paramt->rows + 1;
1782
1783 for (i = param_index; i < lastp; ++i) {
1784 mono_metadata_decode_row (paramt, i - 1, cols, MONO_PARAM_SIZE);
1785 if (cols [MONO_PARAM_FLAGS]) {
1786 if (!pattrs)
1787 pattrs = g_new0 (int, param_count);
1788 /* at runtime we just ignore this kind of malformed file:
1789 * the verifier can signal the error to the user
1790 */
1791 if (cols [MONO_PARAM_SEQUENCE] >= param_count)
1792 continue;
1793 pattrs [cols [MONO_PARAM_SEQUENCE]] = cols [MONO_PARAM_FLAGS];
1794 }
1795 }
1796
1797 return pattrs;
1798 }
1799
1800
1801 /*
1802 * mono_metadata_parse_signature:
1803 * @image: metadata context
1804 * @toke: metadata token
1805 *
1806 * Decode a method signature stored in the STANDALONESIG table
1807 *
1808 * Returns: a MonoMethodSignature describing the signature.
1809 */
1810 MonoMethodSignature*
1811 mono_metadata_parse_signature (MonoImage *image, guint32 token)
1812 {
1813 MonoError error;
1814 MonoMethodSignature *ret;
1815 MonoTableInfo *tables = image->tables;
1816 guint32 idx = mono_metadata_token_index (token);
1817 guint32 sig;
1818 const char *ptr;
1819
1820 if (image_is_dynamic (image))
1821 return mono_lookup_dynamic_token (image, token, NULL);
1822
1823 g_assert (mono_metadata_token_table(token) == MONO_TABLE_STANDALONESIG);
1824
1825 sig = mono_metadata_decode_row_col (&tables [MONO_TABLE_STANDALONESIG], idx - 1, 0);
1826
1827 ptr = mono_metadata_blob_heap (image, sig);
1828 mono_metadata_decode_blob_size (ptr, &ptr);
1829
1830 ret = mono_metadata_parse_method_signature_full (image, NULL, 0, ptr, NULL, &error);
1831 mono_error_cleanup (&error); /*FIXME don't swallow the error message*/
1832 return ret;
1833 }
1834
1835 /*
1836 * mono_metadata_signature_alloc:
1837 * @image: metadata context
1838 * @nparmas: number of parameters in the signature
1839 *
1840 * Allocate a MonoMethodSignature structure with the specified number of params.
1841 * The return type and the params types need to be filled later.
1842 * This is a Mono runtime internal function.
1843 *
1844 * LOCKING: Assumes the loader lock is held.
1845 *
1846 * Returns: the new MonoMethodSignature structure.
1847 */
1848 MonoMethodSignature*
1849 mono_metadata_signature_alloc (MonoImage *m, guint32 nparams)
1850 {
1851 MonoMethodSignature *sig;
1852
1853 sig = mono_image_alloc0 (m, MONO_SIZEOF_METHOD_SIGNATURE + ((gint32)nparams) * sizeof (MonoType*));
1854 sig->param_count = nparams;
1855 sig->sentinelpos = -1;
1856
1857 return sig;
1858 }
1859
1860 static MonoMethodSignature*
1861 mono_metadata_signature_dup_internal (MonoImage *image, MonoMemPool *mp, MonoMethodSignature *sig)
1862 {
1863 int sigsize;
1864 MonoMethodSignature *ret;
1865 sigsize = MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *);
1866
1867 if (image) {
1868 ret = mono_image_alloc (image, sigsize);
1869 } else if (mp) {
1870 ret = mono_mempool_alloc (mp, sigsize);
1871 } else {
1872 ret = g_malloc (sigsize);
1873 }
1874 memcpy (ret, sig, sigsize);
1875 return ret;
1876 }
1877
1878 MonoMethodSignature*
1879 mono_metadata_signature_dup_full (MonoImage *image, MonoMethodSignature *sig)
1880 {
1881 return mono_metadata_signature_dup_internal (image, NULL, sig);
1882 }
1883
1884 /*The mempool is accessed without synchronization*/
1885 MonoMethodSignature*
1886 mono_metadata_signature_dup_mempool (MonoMemPool *mp, MonoMethodSignature *sig)
1887 {
1888 return mono_metadata_signature_dup_internal (NULL, mp, sig);
1889 }
1890
1891 /*
1892 * mono_metadata_signature_dup:
1893 * @sig: method signature
1894 *
1895 * Duplicate an existing MonoMethodSignature so it can be modified.
1896 * This is a Mono runtime internal function.
1897 *
1898 * Returns: the new MonoMethodSignature structure.
1899 */
1900 MonoMethodSignature*
1901 mono_metadata_signature_dup (MonoMethodSignature *sig)
1902 {
1903 return mono_metadata_signature_dup_full (NULL, sig);
1904 }
1905
1906 /*
1907 * mono_metadata_signature_size:
1908 *
1909 * Return the amount of memory allocated to SIG.
1910 */
1911 guint32
1912 mono_metadata_signature_size (MonoMethodSignature *sig)
1913 {
1914 return MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *);
1915 }
1916
1917 /*
1918 * mono_metadata_parse_method_signature:
1919 * @m: metadata context
1920 * @generic_container: generics container
1921 * @def: the MethodDef index or 0 for Ref signatures.
1922 * @ptr: pointer to the signature metadata representation
1923 * @rptr: pointer updated to match the end of the decoded stream
1924 *
1925 * Decode a method signature stored at @ptr.
1926 * This is a Mono runtime internal function.
1927 *
1928 * LOCKING: Assumes the loader lock is held.
1929 *
1930 * Returns: a MonoMethodSignature describing the signature.
1931 */
1932 MonoMethodSignature *
1933 mono_metadata_parse_method_signature_full (MonoImage *m, MonoGenericContainer *container,
1934 int def, const char *ptr, const char **rptr, MonoError *error)
1935 {
1936 MonoMethodSignature *method;
1937 int i, *pattrs = NULL;
1938 guint32 hasthis = 0, explicit_this = 0, call_convention, param_count;
1939 guint32 gen_param_count = 0;
1940 gboolean is_open = FALSE;
1941
1942 mono_error_init (error);
1943
1944 if (*ptr & 0x10)
1945 gen_param_count = 1;
1946 if (*ptr & 0x20)
1947 hasthis = 1;
1948 if (*ptr & 0x40)
1949 explicit_this = 1;
1950 call_convention = *ptr & 0x0F;
1951 ptr++;
1952 if (gen_param_count)
1953 gen_param_count = mono_metadata_decode_value (ptr, &ptr);
1954 param_count = mono_metadata_decode_value (ptr, &ptr);
1955
1956 if (def)
1957 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 */
1958
1959 method = mono_metadata_signature_alloc (m, param_count);
1960 method->hasthis = hasthis;
1961 method->explicit_this = explicit_this;
1962 method->call_convention = call_convention;
1963 method->generic_param_count = gen_param_count;
1964
1965 if (call_convention != 0xa) {
1966 method->ret = mono_metadata_parse_type_full (m, container, MONO_PARSE_RET, pattrs ? pattrs [0] : 0, ptr, &ptr);
1967 if (!method->ret) {
1968 mono_metadata_free_method_signature (method);
1969 g_free (pattrs);
1970 if (mono_loader_get_last_error ())
1971 mono_error_set_from_loader_error (error);
1972 else
1973 mono_error_set_bad_image (error, m, "Could not parse return type signature");
1974 return NULL;
1975 }
1976 is_open = mono_class_is_open_constructed_type (method->ret);
1977 }
1978
1979 for (i = 0; i < method->param_count; ++i) {
1980 if (*ptr == MONO_TYPE_SENTINEL) {
1981 if (method->call_convention != MONO_CALL_VARARG || def) {
1982 mono_loader_assert_no_error ();
1983 mono_error_set_bad_image (error, m, "Found sentinel for methoddef or no vararg");
1984 g_free (pattrs);
1985 return NULL;
1986 }
1987 if (method->sentinelpos >= 0) {
1988 mono_loader_assert_no_error ();
1989 mono_error_set_bad_image (error, m, "Found sentinel twice in the same signature.");
1990 g_free (pattrs);
1991 return NULL;
1992 }
1993 method->sentinelpos = i;
1994 ptr++;
1995 }
1996 method->params [i] = mono_metadata_parse_type_full (m, container, MONO_PARSE_PARAM, pattrs ? pattrs [i+1] : 0, ptr, &ptr);
1997 if (!method->params [i]) {
1998 if (mono_loader_get_last_error ())
1999 mono_error_set_from_loader_error (error);
2000 else
2001 mono_error_set_bad_image (error, m, "Could not parse type argument %d on method signature", i);
2002 mono_metadata_free_method_signature (method);
2003 g_free (pattrs);
2004 return NULL;
2005 }
2006 if (!is_open)
2007 is_open = mono_class_is_open_constructed_type (method->params [i]);
2008 }
2009
2010 /* The sentinel could be missing if the caller does not pass any additional arguments */
2011 if (!def && method->call_convention == MONO_CALL_VARARG && method->sentinelpos < 0)
2012 method->sentinelpos = method->param_count;
2013
2014 method->has_type_parameters = is_open;
2015
2016 if (def && (method->call_convention == MONO_CALL_VARARG))
2017 method->sentinelpos = method->param_count;
2018
2019 g_free (pattrs);
2020
2021 if (rptr)
2022 *rptr = ptr;
2023 /*
2024 * Add signature to a cache and increase ref count...
2025 */
2026
2027 mono_loader_assert_no_error ();
2028 return method;
2029 }
2030
2031 /*
2032 * mono_metadata_parse_method_signature:
2033 * @m: metadata context
2034 * @def: the MethodDef index or 0 for Ref signatures.
2035 * @ptr: pointer to the signature metadata representation
2036 * @rptr: pointer updated to match the end of the decoded stream
2037 *
2038 * Decode a method signature stored at @ptr.
2039 * This is a Mono runtime internal function.
2040 *
2041 * LOCKING: Assumes the loader lock is held.
2042 *
2043 * Returns: a MonoMethodSignature describing the signature.
2044 */
2045 MonoMethodSignature *
2046 mono_metadata_parse_method_signature (MonoImage *m, int def, const char *ptr, const char **rptr)
2047 {
2048 MonoError error;
2049 MonoMethodSignature *ret;
2050 ret = mono_metadata_parse_method_signature_full (m, NULL, def, ptr, rptr, &error);
2051 if (!ret) {
2052 mono_loader_set_error_from_mono_error (&error);
2053 mono_error_cleanup (&error); /*FIXME don't swallow the error message*/
2054 }
2055 return ret;
2056 }
2057
2058 /*
2059 * mono_metadata_free_method_signature:
2060 * @sig: signature to destroy
2061 *
2062 * Free the memory allocated in the signature @sig.
2063 * This method needs to be robust and work also on partially-built
2064 * signatures, so it does extra checks.
2065 */
2066 void
2067 mono_metadata_free_method_signature (MonoMethodSignature *sig)
2068 {
2069 /* Everything is allocated from mempools */
2070 /*
2071 int i;
2072 if (sig->ret)
2073 mono_metadata_free_type (sig->ret);
2074 for (i = 0; i < sig->param_count; ++i) {
2075 if (sig->params [i])
2076 mono_metadata_free_type (sig->params [i]);
2077 }
2078 */
2079 }
2080
2081 void
2082 mono_metadata_free_inflated_signature (MonoMethodSignature *sig)
2083 {
2084 int i;
2085
2086 /* Allocated in inflate_generic_signature () */
2087 if (sig->ret)
2088 mono_metadata_free_type (sig->ret);
2089 for (i = 0; i < sig->param_count; ++i) {
2090 if (sig->params [i])
2091 mono_metadata_free_type (sig->params [i]);
2092 }
2093 g_free (sig);
2094 }
2095
2096 static gboolean
2097 inflated_method_equal (gconstpointer a, gconstpointer b)
2098 {
2099 const MonoMethodInflated *ma = a;
2100 const MonoMethodInflated *mb = b;
2101 if (ma->declaring != mb->declaring)
2102 return FALSE;
2103 if (ma->method.method.is_mb_open != mb->method.method.is_mb_open)
2104 return FALSE;
2105 return mono_metadata_generic_context_equal (&ma->context, &mb->context);
2106 }
2107
2108 static guint
2109 inflated_method_hash (gconstpointer a)
2110 {
2111 const MonoMethodInflated *ma = a;
2112 return (mono_metadata_generic_context_hash (&ma->context) ^ mono_aligned_addr_hash (ma->declaring)) + ma->method.method.is_mb_open;
2113 }
2114
2115 static gboolean
2116 inflated_signature_equal (gconstpointer a, gconstpointer b)
2117 {
2118 const MonoInflatedMethodSignature *sig1 = a;
2119 const MonoInflatedMethodSignature *sig2 = b;
2120
2121 /* sig->sig is assumed to be canonized */
2122 if (sig1->sig != sig2->sig)
2123 return FALSE;
2124 /* The generic instances are canonized */
2125 return mono_metadata_generic_context_equal (&sig1->context, &sig2->context);
2126 }
2127
2128 static guint
2129 inflated_signature_hash (gconstpointer a)
2130 {
2131 const MonoInflatedMethodSignature *sig = a;
2132
2133 /* sig->sig is assumed to be canonized */
2134 return mono_metadata_generic_context_hash (&sig->context) ^ mono_aligned_addr_hash (sig->sig);
2135 }
2136
2137 /*static void
2138 dump_ginst (MonoGenericInst *ginst)
2139 {
2140 int i;
2141 char *name;
2142
2143 g_print ("Ginst: <");
2144 for (i = 0; i < ginst->type_argc; ++i) {
2145 if (i != 0)
2146 g_print (", ");
2147 name = mono_type_get_name (ginst->type_argv [i]);
2148 g_print ("%s", name);
2149 g_free (name);
2150 }
2151 g_print (">");
2152 }*/
2153
2154 static gboolean type_in_image (MonoType *type, MonoImage *image);
2155
2156 static gboolean
2157 signature_in_image (MonoMethodSignature *sig, MonoImage *image)
2158 {
2159 gpointer iter = NULL;
2160 MonoType *p;
2161
2162 while ((p = mono_signature_get_params (sig, &iter)) != NULL)
2163 if (type_in_image (p, image))
2164 return TRUE;
2165
2166 return type_in_image (mono_signature_get_return_type (sig), image);
2167 }
2168
2169 static gboolean
2170 ginst_in_image (MonoGenericInst *ginst, MonoImage *image)
2171 {
2172 int i;
2173
2174 for (i = 0; i < ginst->type_argc; ++i) {
2175 if (type_in_image (ginst->type_argv [i], image))
2176 return TRUE;
2177 }
2178
2179 return FALSE;
2180 }
2181
2182 static gboolean
2183 gclass_in_image (MonoGenericClass *gclass, MonoImage *image)
2184 {
2185 return gclass->container_class->image == image ||
2186 ginst_in_image (gclass->context.class_inst, image);
2187 }
2188
2189 static gboolean
2190 type_in_image (MonoType *type, MonoImage *image)
2191 {
2192 retry:
2193 switch (type->type) {
2194 case MONO_TYPE_GENERICINST:
2195 return gclass_in_image (type->data.generic_class, image);
2196 case MONO_TYPE_PTR:
2197 type = type->data.type;
2198 goto retry;
2199 case MONO_TYPE_SZARRAY:
2200 type = &type->data.klass->byval_arg;
2201 goto retry;
2202 case MONO_TYPE_ARRAY:
2203 type = &type->data.array->eklass->byval_arg;
2204 goto retry;
2205 case MONO_TYPE_FNPTR:
2206 return signature_in_image (type->data.method, image);
2207 case MONO_TYPE_VAR: {
2208 MonoGenericContainer *container = mono_type_get_generic_param_owner (type);
2209 if (container) {
2210 g_assert (!container->is_method);
2211 /*
2212 * FIXME: The following check is here solely
2213 * for monodis, which uses the internal
2214 * function
2215 * mono_metadata_load_generic_params(). The
2216 * caller of that function needs to fill in
2217 * owner->klass or owner->method of the
2218 * returned struct, but monodis doesn't do
2219 * that. The image unloading depends on that,
2220 * however, so a crash results without this
2221 * check.
2222 */
2223 if (!container->owner.klass)
2224 return container->image == image;
2225 return container->owner.klass->image == image;
2226 } else {
2227 return type->data.generic_param->image == image;
2228 }
2229 }
2230 case MONO_TYPE_MVAR: {
2231 MonoGenericContainer *container = mono_type_get_generic_param_owner (type);
2232 if (type->data.generic_param->image == image)
2233 return TRUE;
2234 if (container) {
2235 g_assert (container->is_method);
2236 if (!container->owner.method)
2237 /* RefEmit created generic param whose method is not finished */
2238 return container->image == image;
2239 return container->owner.method->klass->image == image;
2240 } else {
2241 return type->data.generic_param->image == image;
2242 }
2243 }
2244 default:
2245 /* At this point, we should've avoided all potential allocations in mono_class_from_mono_type () */
2246 return image == mono_class_from_mono_type (type)->image;
2247 }
2248 }
2249
2250 static inline void
2251 image_sets_lock (void)
2252 {
2253 mono_mutex_lock (&image_sets_mutex);
2254 }
2255
2256 static inline void
2257 image_sets_unlock (void)
2258 {
2259 mono_mutex_unlock (&image_sets_mutex);
2260 }
2261
2262 /*
2263 * get_image_set:
2264 *
2265 * Return a MonoImageSet representing the set of images in IMAGES.
2266 */
2267 static MonoImageSet*
2268 get_image_set (MonoImage **images, int nimages)
2269 {
2270 int i, j, k;
2271 MonoImageSet *set;
2272 GSList *l;
2273
2274 /* Common case */
2275 if (nimages == 1 && images [0] == mono_defaults.corlib && mscorlib_image_set)
2276 return mscorlib_image_set;
2277
2278 /* Happens with empty generic instances */
2279 if (nimages == 0)
2280 return mscorlib_image_set;
2281
2282 image_sets_lock ();
2283
2284 if (!image_sets)
2285 image_sets = g_ptr_array_new ();
2286
2287 if (images [0] == mono_defaults.corlib && nimages > 1)
2288 l = images [1]->image_sets;
2289 else
2290 l = images [0]->image_sets;
2291
2292 set = NULL;
2293 for (; l; l = l->next) {
2294 set = l->data;
2295
2296 if (set->nimages == nimages) {
2297 for (j = 0; j < nimages; ++j) {
2298 for (k = 0; k < nimages; ++k)
2299 if (set->images [k] == images [j])
2300 break;
2301 if (k == nimages)
2302 /* Not found */
2303 break;
2304 }
2305 if (j == nimages)
2306 /* Found */
2307 break;
2308 }
2309 }
2310
2311 if (!l) {
2312 /* Not found */
2313 set = g_new0 (MonoImageSet, 1);
2314 set->nimages = nimages;
2315 set->images = g_new0 (MonoImage*, nimages);
2316 mono_mutex_init_recursive (&set->lock);
2317 for (i = 0; i < nimages; ++i)
2318 set->images [i] = images [i];
2319 set->gclass_cache = g_hash_table_new_full (mono_generic_class_hash, mono_generic_class_equal, NULL, (GDestroyNotify)free_generic_class);
2320 set->ginst_cache = g_hash_table_new_full (mono_metadata_generic_inst_hash, mono_metadata_generic_inst_equal, NULL, (GDestroyNotify)free_generic_inst);
2321 set->gmethod_cache = g_hash_table_new_full (inflated_method_hash, inflated_method_equal, NULL, (GDestroyNotify)free_inflated_method);
2322 set->gsignature_cache = g_hash_table_new_full (inflated_signature_hash, inflated_signature_equal, NULL, (GDestroyNotify)free_inflated_signature);
2323
2324 for (i = 0; i < nimages; ++i)
2325 set->images [i]->image_sets = g_slist_prepend (set->images [i]->image_sets, set);
2326
2327 g_ptr_array_add (image_sets, set);
2328 }
2329
2330 if (nimages == 1 && images [0] == mono_defaults.corlib) {
2331 mono_memory_barrier ();
2332 mscorlib_image_set = set;
2333 }
2334
2335 image_sets_unlock ();
2336
2337 return set;
2338 }
2339
2340 static void
2341 delete_image_set (MonoImageSet *set)
2342 {
2343 int i;
2344
2345 g_hash_table_destroy (set->gclass_cache);
2346 g_hash_table_destroy (set->ginst_cache);
2347 g_hash_table_destroy (set->gmethod_cache);
2348 g_hash_table_destroy (set->gsignature_cache);
2349
2350 image_sets_lock ();
2351
2352 for (i = 0; i < set->nimages; ++i)
2353 set->images [i]->image_sets = g_slist_remove (set->images [i]->image_sets, set);
2354
2355 g_ptr_array_remove (image_sets, set);
2356
2357 image_sets_unlock ();
2358
2359 if (set->mempool)
2360 mono_mempool_destroy (set->mempool);
2361 g_free (set->images);
2362 mono_mutex_destroy (&set->lock);
2363 g_free (set);
2364 }
2365
2366 static void
2367 mono_image_set_lock (MonoImageSet *set)
2368 {
2369 mono_mutex_lock (&set->lock);
2370 }
2371
2372 static void
2373 mono_image_set_unlock (MonoImageSet *set)
2374 {
2375 mono_mutex_unlock (&set->lock);
2376 }
2377
2378 gpointer
2379 mono_image_set_alloc (MonoImageSet *set, guint size)
2380 {
2381 gpointer res;
2382
2383 mono_image_set_lock (set);
2384 if (!set->mempool)
2385 set->mempool = mono_mempool_new_size (1024);
2386 res = mono_mempool_alloc (set->mempool, size);
2387 mono_image_set_unlock (set);
2388
2389 return res;
2390 }
2391
2392 gpointer
2393 mono_image_set_alloc0 (MonoImageSet *set, guint size)
2394 {
2395 gpointer res;
2396
2397 mono_image_set_lock (set);
2398 if (!set->mempool)
2399 set->mempool = mono_mempool_new_size (1024);
2400 res = mono_mempool_alloc0 (set->mempool, size);
2401 mono_image_set_unlock (set);
2402
2403 return res;
2404 }
2405
2406 char*
2407 mono_image_set_strdup (MonoImageSet *set, const char *s)
2408 {
2409 char *res;
2410
2411 mono_image_set_lock (set);
2412 if (!set->mempool)
2413 set->mempool = mono_mempool_new_size (1024);
2414 res = mono_mempool_strdup (set->mempool, s);
2415 mono_image_set_unlock (set);
2416
2417 return res;
2418 }
2419
2420 /*
2421 * Structure used by the collect_..._images functions to store the image list.
2422 */
2423 typedef struct {
2424 MonoImage *image_buf [64];
2425 MonoImage **images;
2426 int nimages, images_len;
2427 } CollectData;
2428
2429 static void
2430 collect_data_init (CollectData *data)
2431 {
2432 data->images = data->image_buf;
2433 data->images_len = 64;
2434 data->nimages = 0;
2435 }
2436
2437 static void
2438 collect_data_free (CollectData *data)
2439 {
2440 if (data->images != data->image_buf)
2441 g_free (data->images);
2442 }
2443
2444 static void
2445 enlarge_data (CollectData *data)
2446 {
2447 int new_len = data->images_len < 16 ? 16 : data->images_len * 2;
2448 MonoImage **d = g_new (MonoImage *, new_len);
2449
2450 // FIXME: test this
2451 g_assert_not_reached ();
2452 memcpy (d, data->images, data->images_len);
2453 if (data->images != data->image_buf)
2454 g_free (data->images);
2455 data->images = d;
2456 data->images_len = new_len;
2457 }
2458
2459 static inline void
2460 add_image (MonoImage *image, CollectData *data)
2461 {
2462 int i;
2463
2464 /* The arrays are small, so use a linear search instead of a hash table */
2465 for (i = 0; i < data->nimages; ++i)
2466 if (data->images [i] == image)
2467 return;
2468
2469 if (data->nimages == data->images_len)
2470 enlarge_data (data);
2471
2472 data->images [data->nimages ++] = image;
2473 }
2474
2475 static void
2476 collect_type_images (MonoType *type, CollectData *data);
2477
2478 static void
2479 collect_ginst_images (MonoGenericInst *ginst, CollectData *data)
2480 {
2481 int i;
2482
2483 for (i = 0; i < ginst->type_argc; ++i) {
2484 collect_type_images (ginst->type_argv [i], data);
2485 }
2486 }
2487
2488 static void
2489 collect_gclass_images (MonoGenericClass *gclass, CollectData *data)
2490 {
2491 add_image (gclass->container_class->image, data);
2492 if (gclass->context.class_inst)
2493 collect_ginst_images (gclass->context.class_inst, data);
2494 }
2495
2496 static void
2497 collect_signature_images (MonoMethodSignature *sig, CollectData *data)
2498 {
2499 gpointer iter = NULL;
2500 MonoType *p;
2501
2502 collect_type_images (mono_signature_get_return_type (sig), data);
2503 while ((p = mono_signature_get_params (sig, &iter)) != NULL)
2504 collect_type_images (p, data);
2505 }
2506
2507 static void
2508 collect_inflated_signature_images (MonoInflatedMethodSignature *sig, CollectData *data)
2509 {
2510 collect_signature_images (sig->sig, data);
2511 if (sig->context.class_inst)
2512 collect_ginst_images (sig->context.class_inst, data);
2513 if (sig->context.method_inst)
2514 collect_ginst_images (sig->context.method_inst, data);
2515 }
2516
2517 static void
2518 collect_method_images (MonoMethodInflated *method, CollectData *data)
2519 {
2520 MonoMethod *m = method->declaring;
2521
2522 add_image (method->declaring->klass->image, data);
2523 if (method->context.class_inst)
2524 collect_ginst_images (method->context.class_inst, data);
2525 if (method->context.method_inst)
2526 collect_ginst_images (method->context.method_inst, data);
2527 /*
2528 * Dynamic assemblies have no references, so the images they depend on can be unloaded before them.
2529 */
2530 if (image_is_dynamic (m->klass->image))
2531 collect_signature_images (mono_method_signature (m), data);
2532 }
2533
2534 static void
2535 collect_type_images (MonoType *type, CollectData *data)
2536 {
2537 retry:
2538 switch (type->type) {
2539 case MONO_TYPE_GENERICINST:
2540 collect_gclass_images (type->data.generic_class, data);
2541 break;
2542 case MONO_TYPE_PTR:
2543 type = type->data.type;
2544 goto retry;
2545 case MONO_TYPE_SZARRAY:
2546 type = &type->data.klass->byval_arg;
2547 goto retry;
2548 case MONO_TYPE_ARRAY:
2549 type = &type->data.array->eklass->byval_arg;
2550 goto retry;
2551 case MONO_TYPE_FNPTR:
2552 //return signature_in_image (type->data.method, image);
2553 g_assert_not_reached ();
2554 case MONO_TYPE_VAR: {
2555 MonoGenericContainer *container = mono_type_get_generic_param_owner (type);
2556 if (container) {
2557 g_assert (!container->is_method);
2558 /*
2559 * FIXME: The following check is here solely
2560 * for monodis, which uses the internal
2561 * function
2562 * mono_metadata_load_generic_params(). The
2563 * caller of that function needs to fill in
2564 * owner->klass or owner->method of the
2565 * returned struct, but monodis doesn't do
2566 * that. The image unloading depends on that,
2567 * however, so a crash results without this
2568 * check.
2569 */
2570 if (!container->owner.klass)
2571 add_image (container->image, data);
2572 else
2573 add_image (container->owner.klass->image, data);
2574 } else {
2575 add_image (type->data.generic_param->image, data);
2576 }
2577 }
2578 break;
2579 case MONO_TYPE_MVAR: {
2580 MonoGenericContainer *container = mono_type_get_generic_param_owner (type);
2581 if (type->data.generic_param->image)
2582 add_image (type->data.generic_param->image, data);
2583 if (container) {
2584 if (!container->owner.method) {
2585 /* RefEmit created generic param whose method is not finished */
2586 add_image (container->image, data);
2587 } else {
2588 g_assert (container->is_method);
2589 add_image (container->owner.method->klass->image, data);
2590 }
2591 } else {
2592 add_image (type->data.generic_param->image, data);
2593 }
2594 }
2595 break;
2596 case MONO_TYPE_CLASS:
2597 case MONO_TYPE_VALUETYPE:
2598 add_image (mono_class_from_mono_type (type)->image, data);
2599 break;
2600 default:
2601 add_image (mono_defaults.corlib, data);
2602 }
2603 }
2604
2605 typedef struct {
2606 MonoImage *image;
2607 GSList *list;
2608 } CleanForImageUserData;
2609
2610 static gboolean
2611 steal_gclass_in_image (gpointer key, gpointer value, gpointer data)
2612 {
2613 MonoGenericClass *gclass = key;
2614 CleanForImageUserData *user_data = data;
2615
2616 g_assert (gclass_in_image (gclass, user_data->image));
2617
2618 user_data->list = g_slist_prepend (user_data->list, gclass);
2619 return TRUE;
2620 }
2621
2622 static gboolean
2623 steal_ginst_in_image (gpointer key, gpointer value, gpointer data)
2624 {
2625 MonoGenericInst *ginst = key;
2626 CleanForImageUserData *user_data = data;
2627
2628 // This doesn't work during corlib compilation
2629 //g_assert (ginst_in_image (ginst, user_data->image));
2630
2631 user_data->list = g_slist_prepend (user_data->list, ginst);
2632 return TRUE;
2633 }
2634
2635 static gboolean
2636 inflated_method_in_image (gpointer key, gpointer value, gpointer data)
2637 {
2638 MonoImage *image = data;
2639 MonoMethodInflated *method = key;
2640
2641 // FIXME:
2642 // https://bugzilla.novell.com/show_bug.cgi?id=458168
2643 g_assert (method->declaring->klass->image == image ||
2644 (method->context.class_inst && ginst_in_image (method->context.class_inst, image)) ||
2645 (method->context.method_inst && ginst_in_image (method->context.method_inst, image)) || (((MonoMethod*)method)->signature && signature_in_image (mono_method_signature ((MonoMethod*)method), image)));
2646
2647 return TRUE;
2648 }
2649
2650 static gboolean
2651 inflated_signature_in_image (gpointer key, gpointer value, gpointer data)
2652 {
2653 MonoImage *image = data;
2654 MonoInflatedMethodSignature *sig = key;
2655
2656 return signature_in_image (sig->sig, image) ||
2657 (sig->context.class_inst && ginst_in_image (sig->context.class_inst, image)) ||
2658 (sig->context.method_inst && ginst_in_image (sig->context.method_inst, image));
2659 }
2660
2661 static void
2662 check_gmethod (gpointer key, gpointer value, gpointer data)
2663 {
2664 MonoMethodInflated *method = key;
2665 MonoImage *image = data;
2666
2667 if (method->context.class_inst)
2668 g_assert (!ginst_in_image (method->context.class_inst, image));
2669 if (method->context.method_inst)
2670 g_assert (!ginst_in_image (method->context.method_inst, image));
2671 if (((MonoMethod*)method)->signature)
2672 g_assert (!signature_in_image (mono_method_signature ((MonoMethod*)method), image));
2673 }
2674
2675 /*
2676 * check_image_sets:
2677 *
2678 * Run a consistency check on the image set data structures.
2679 */
2680 static G_GNUC_UNUSED void
2681 check_image_sets (MonoImage *image)
2682 {
2683 int i;
2684 GSList *l = image->image_sets;
2685
2686 if (!image_sets)
2687 return;
2688
2689 for (i = 0; i < image_sets->len; ++i) {
2690 MonoImageSet *set = g_ptr_array_index (image_sets, i);
2691
2692 if (!g_slist_find (l, set)) {
2693 g_hash_table_foreach (set->gmethod_cache, check_gmethod, image);
2694 }
2695 }
2696 }
2697
2698 void
2699 mono_metadata_clean_for_image (MonoImage *image)
2700 {
2701 CleanForImageUserData ginst_data, gclass_data;
2702 GSList *l, *set_list;
2703
2704 //check_image_sets (image);
2705
2706 /*
2707 * The data structures could reference each other so we delete them in two phases.
2708 * This is required because of the hashing functions in gclass/ginst_cache.
2709 */
2710 ginst_data.image = gclass_data.image = image;
2711 ginst_data.list = gclass_data.list = NULL;
2712
2713 /* Collect the items to delete */
2714 /* delete_image_set () modifies the lists so make a copy */
2715 for (l = image->image_sets; l; l = l->next) {
2716 MonoImageSet *set = l->data;
2717
2718 mono_image_set_lock (set);
2719 g_hash_table_foreach_steal (set->gclass_cache, steal_gclass_in_image, &gclass_data);
2720 g_hash_table_foreach_steal (set->ginst_cache, steal_ginst_in_image, &ginst_data);
2721 g_hash_table_foreach_remove (set->gmethod_cache, inflated_method_in_image, image);
2722 g_hash_table_foreach_remove (set->gsignature_cache, inflated_signature_in_image, image);
2723 mono_image_set_unlock (set);
2724 }
2725
2726 /* Delete the removed items */
2727 for (l = ginst_data.list; l; l = l->next)
2728 free_generic_inst (l->data);
2729 for (l = gclass_data.list; l; l = l->next)
2730 free_generic_class (l->data);
2731 g_slist_free (ginst_data.list);
2732 g_slist_free (gclass_data.list);
2733 /* delete_image_set () modifies the lists so make a copy */
2734 set_list = g_slist_copy (image->image_sets);
2735 for (l = set_list; l; l = l->next) {
2736 MonoImageSet *set = l->data;
2737
2738 delete_image_set (set);
2739 }
2740 g_slist_free (set_list);
2741 }
2742
2743 static void
2744 free_inflated_method (MonoMethodInflated *imethod)
2745 {
2746 int i;
2747 MonoMethod *method = (MonoMethod*)imethod;
2748
2749 mono_marshal_free_inflated_wrappers (method);
2750
2751 if (method->signature)
2752 mono_metadata_free_inflated_signature (method->signature);
2753
2754 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))) {
2755 MonoMethodHeader *header = imethod->header;
2756
2757 if (header) {
2758 /* Allocated in inflate_generic_header () */
2759 for (i = 0; i < header->num_locals; ++i)
2760 mono_metadata_free_type (header->locals [i]);
2761 g_free (header->clauses);
2762 g_free (header);
2763 }
2764 }
2765
2766 g_free (method);
2767 }
2768
2769 static void
2770 free_generic_inst (MonoGenericInst *ginst)
2771 {
2772 int i;
2773
2774 /* The ginst itself is allocated from the image set mempool */
2775 for (i = 0; i < ginst->type_argc; ++i)
2776 mono_metadata_free_type (ginst->type_argv [i]);
2777 }
2778
2779 static void
2780 free_generic_class (MonoGenericClass *gclass)
2781 {
2782 /* The gclass itself is allocated from the image set mempool */
2783 if (gclass->is_dynamic)
2784 mono_reflection_free_dynamic_generic_class (gclass);
2785 if (gclass->cached_class && gclass->cached_class->interface_id)
2786 mono_unload_interface_id (gclass->cached_class);
2787 }
2788
2789 static void
2790 free_inflated_signature (MonoInflatedMethodSignature *sig)
2791 {
2792 mono_metadata_free_inflated_signature (sig->sig);
2793 g_free (sig);
2794 }
2795
2796 MonoMethodInflated*
2797 mono_method_inflated_lookup (MonoMethodInflated* method, gboolean cache)
2798 {
2799 CollectData data;
2800 MonoImageSet *set;
2801 gpointer res;
2802
2803 collect_data_init (&data);
2804
2805 collect_method_images (method, &data);
2806
2807 set = get_image_set (data.images, data.nimages);
2808
2809 collect_data_free (&data);
2810
2811 mono_image_set_lock (set);
2812 res = g_hash_table_lookup (set->gmethod_cache, method);
2813 if (!res && cache) {
2814 g_hash_table_insert (set->gmethod_cache, method, method);
2815 res = method;
2816 }
2817
2818 mono_image_set_unlock (set);
2819 return res;
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 = 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 /*
2865 * mono_metadata_get_generic_inst:
2866 *
2867 * Given a list of types, return a MonoGenericInst that represents that list.
2868 * The returned MonoGenericInst has its own copy of the list of types. The list
2869 * passed in the argument can be freed, modified or disposed of.
2870 *
2871 */
2872 MonoGenericInst *
2873 mono_metadata_get_generic_inst (int type_argc, MonoType **type_argv)
2874 {
2875 MonoGenericInst *ginst;
2876 gboolean is_open;
2877 int i;
2878 int size = MONO_SIZEOF_GENERIC_INST + type_argc * sizeof (MonoType *);
2879 CollectData data;
2880 MonoImageSet *set;
2881
2882 for (i = 0; i < type_argc; ++i)
2883 if (mono_class_is_open_constructed_type (type_argv [i]))
2884 break;
2885 is_open = (i < type_argc);
2886
2887 ginst = g_alloca (size);
2888 memset (ginst, 0, sizeof (MonoGenericInst));
2889 ginst->is_open = is_open;
2890 ginst->type_argc = type_argc;
2891 memcpy (ginst->type_argv, type_argv, type_argc * sizeof (MonoType *));
2892
2893 collect_data_init (&data);
2894
2895 collect_ginst_images (ginst, &data);
2896
2897 set = get_image_set (data.images, data.nimages);
2898
2899 collect_data_free (&data);
2900
2901 mono_image_set_lock (set);
2902
2903 ginst = g_hash_table_lookup (set->ginst_cache, ginst);
2904 if (!ginst) {
2905 ginst = mono_image_set_alloc0 (set, size);
2906 #ifndef MONO_SMALL_CONFIG
2907 ginst->id = ++next_generic_inst_id;
2908 #endif
2909 ginst->is_open = is_open;
2910 ginst->type_argc = type_argc;
2911
2912 for (i = 0; i < type_argc; ++i)
2913 ginst->type_argv [i] = mono_metadata_type_dup (NULL, type_argv [i]);
2914
2915 g_hash_table_insert (set->ginst_cache, ginst, ginst);
2916 }
2917
2918 mono_image_set_unlock (set);
2919 return ginst;
2920 }
2921
2922 static gboolean
2923 mono_metadata_is_type_builder_generic_type_definition (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2924 {
2925 MonoGenericContainer *container = container_class->generic_container;
2926
2927 if (!is_dynamic || container_class->wastypebuilder || container->type_argc != inst->type_argc)
2928 return FALSE;
2929 return inst == container->context.class_inst;
2930 }
2931
2932 /*
2933 * mono_metadata_lookup_generic_class:
2934 *
2935 * Returns a MonoGenericClass with the given properties.
2936 *
2937 */
2938 MonoGenericClass *
2939 mono_metadata_lookup_generic_class (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2940 {
2941 MonoGenericClass *gclass;
2942 MonoGenericClass helper;
2943 gboolean is_tb_open = mono_metadata_is_type_builder_generic_type_definition (container_class, inst, is_dynamic);
2944 MonoImageSet *set;
2945 CollectData data;
2946
2947 helper.container_class = container_class;
2948 helper.context.class_inst = inst;
2949 helper.context.method_inst = NULL;
2950 helper.is_dynamic = is_dynamic; /* We use this in a hash lookup, which does not attempt to downcast the pointer */
2951 helper.is_tb_open = is_tb_open;
2952 helper.cached_class = NULL;
2953
2954 collect_data_init (&data);
2955
2956 collect_gclass_images (&helper, &data);
2957
2958 set = get_image_set (data.images, data.nimages);
2959
2960 collect_data_free (&data);
2961
2962 mono_image_set_lock (set);
2963
2964 gclass = g_hash_table_lookup (set->gclass_cache, &helper);
2965
2966 /* A tripwire just to keep us honest */
2967 g_assert (!helper.cached_class);
2968
2969 if (gclass) {
2970 mono_image_set_unlock (set);
2971 return gclass;
2972 }
2973
2974 if (is_dynamic) {
2975 MonoDynamicGenericClass *dgclass = mono_image_set_new0 (set, MonoDynamicGenericClass, 1);
2976 gclass = &dgclass->generic_class;
2977 gclass->is_dynamic = 1;
2978 } else {
2979 gclass = mono_image_set_new0 (set, MonoGenericClass, 1);
2980 }
2981
2982 gclass->is_tb_open = is_tb_open;
2983 gclass->container_class = container_class;
2984 gclass->context.class_inst = inst;
2985 gclass->context.method_inst = NULL;
2986 gclass->owner = set;
2987 if (inst == container_class->generic_container->context.class_inst && !is_tb_open)
2988 gclass->cached_class = container_class;
2989
2990 g_hash_table_insert (set->gclass_cache, gclass, gclass);
2991
2992 mono_image_set_unlock (set);
2993
2994 return gclass;
2995 }
2996
2997 /*
2998 * mono_metadata_inflate_generic_inst:
2999 *
3000 * Instantiate the generic instance @ginst with the context @context.
3001 * Check @error for success.
3002 *
3003 */
3004 MonoGenericInst *
3005 mono_metadata_inflate_generic_inst (MonoGenericInst *ginst, MonoGenericContext *context, MonoError *error)
3006 {
3007 MonoType **type_argv;
3008 MonoGenericInst *nginst = NULL;
3009 int i, count = 0;
3010
3011 mono_error_init (error);
3012
3013 if (!ginst->is_open)
3014 return ginst;
3015
3016 type_argv = g_new0 (MonoType*, ginst->type_argc);
3017
3018 for (i = 0; i < ginst->type_argc; i++) {
3019 type_argv [i] = mono_class_inflate_generic_type_checked (ginst->type_argv [i], context, error);
3020 if (!mono_error_ok (error))
3021 goto cleanup;
3022 ++count;
3023 }
3024
3025 nginst = mono_metadata_get_generic_inst (ginst->type_argc, type_argv);
3026
3027 cleanup:
3028 for (i = 0; i < count; i++)
3029 mono_metadata_free_type (type_argv [i]);
3030 g_free (type_argv);
3031
3032 return nginst;
3033 }
3034
3035 MonoGenericInst *
3036 mono_metadata_parse_generic_inst (MonoImage *m, MonoGenericContainer *container,
3037 int count, const char *ptr, const char **rptr)
3038 {
3039 MonoType **type_argv;
3040 MonoGenericInst *ginst;
3041 int i;
3042
3043 type_argv = g_new0 (MonoType*, count);
3044
3045 for (i = 0; i < count; i++) {
3046 MonoType *t = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
3047 if (!t) {
3048 g_free (type_argv);
3049 return NULL;
3050 }
3051 type_argv [i] = t;
3052 }
3053
3054 if (rptr)
3055 *rptr = ptr;
3056
3057 ginst = mono_metadata_get_generic_inst (count, type_argv);
3058
3059 g_free (type_argv);
3060
3061 return ginst;
3062 }
3063
3064 static gboolean
3065 do_mono_metadata_parse_generic_class (MonoType *type, MonoImage *m, MonoGenericContainer *container,
3066 const char *ptr, const char **rptr)
3067 {
3068 MonoGenericInst *inst;
3069 MonoClass *gklass;
3070 MonoType *gtype;
3071 int count;
3072
3073 gtype = mono_metadata_parse_type (m, MONO_PARSE_TYPE, 0, ptr, &ptr);
3074 if (gtype == NULL)
3075 return FALSE;
3076
3077 gklass = mono_class_from_mono_type (gtype);
3078 if (!gklass->generic_container)
3079 return FALSE;
3080
3081 count = mono_metadata_decode_value (ptr, &ptr);
3082 inst = mono_metadata_parse_generic_inst (m, container, count, ptr, &ptr);
3083 if (inst == NULL)
3084 return FALSE;
3085
3086 if (rptr)
3087 *rptr = ptr;
3088
3089 type->data.generic_class = mono_metadata_lookup_generic_class (gklass, inst, FALSE);
3090 return TRUE;
3091 }
3092
3093 /*
3094 * select_container:
3095 * @gc: The generic container to normalize
3096 * @type: The kind of generic parameters the resulting generic-container should contain
3097 */
3098
3099 static MonoGenericContainer *
3100 select_container (MonoGenericContainer *gc, MonoTypeEnum type)
3101 {
3102 gboolean is_var = (type == MONO_TYPE_VAR);
3103 if (!gc)
3104 return NULL;
3105
3106 g_assert (is_var || type == MONO_TYPE_MVAR);
3107
3108 if (is_var) {
3109 if (gc->is_method || gc->parent)
3110 /*
3111 * The current MonoGenericContainer is a generic method -> its `parent'
3112 * points to the containing class'es container.
3113 */
3114 return gc->parent;
3115 }
3116
3117 return gc;
3118 }
3119
3120 /*
3121 * mono_metadata_parse_generic_param:
3122 * @generic_container: Our MonoClass's or MonoMethod's MonoGenericContainer;
3123 * see mono_metadata_parse_type_full() for details.
3124 * Internal routine to parse a generic type parameter.
3125 * LOCKING: Acquires the loader lock
3126 */
3127 static MonoGenericParam *
3128 mono_metadata_parse_generic_param (MonoImage *m, MonoGenericContainer *generic_container,
3129 MonoTypeEnum type, const char *ptr, const char **rptr)
3130 {
3131 int index = mono_metadata_decode_value (ptr, &ptr);
3132 if (rptr)
3133 *rptr = ptr;
3134
3135 generic_container = select_container (generic_container, type);
3136 if (!generic_container) {
3137 /* Create dummy MonoGenericParam */
3138 MonoGenericParam *param;
3139
3140 param = mono_image_alloc0 (m, sizeof (MonoGenericParam));
3141 param->num = index;
3142 param->image = m;
3143
3144 return param;
3145 }
3146
3147 if (index >= generic_container->type_argc)
3148 return NULL;
3149
3150 return mono_generic_container_get_param (generic_container, index);
3151 }
3152
3153 /*
3154 * mono_metadata_get_shared_type:
3155 *
3156 * Return a shared instance of TYPE, if available, NULL otherwise.
3157 * Shared MonoType instances help save memory. Their contents should not be modified
3158 * by the caller. They do not need to be freed as their lifetime is bound by either
3159 * the lifetime of the runtime (builtin types), or the lifetime of the MonoClass
3160 * instance they are embedded in. If they are freed, they should be freed using
3161 * mono_metadata_free_type () instead of g_free ().
3162 */
3163 MonoType*
3164 mono_metadata_get_shared_type (MonoType *type)
3165 {
3166 MonoType *cached;
3167
3168 /* No need to use locking since nobody is modifying the hash table */
3169 if ((cached = g_hash_table_lookup (type_cache, type)))
3170 return cached;
3171
3172 switch (type->type){
3173 case MONO_TYPE_CLASS:
3174 case MONO_TYPE_VALUETYPE:
3175 if (type == &type->data.klass->byval_arg)
3176 return type;
3177 if (type == &type->data.klass->this_arg)
3178 return type;
3179 break;
3180 default:
3181 break;
3182 }
3183
3184 return NULL;
3185 }
3186
3187 static gboolean
3188 compare_type_literals (int class_type, int type_type)
3189 {
3190 /* byval_arg.type can be zero if we're decoding a type that references a class been loading.
3191 * See mcs/test/gtest-440. and #650936.
3192 * FIXME This better be moved to the metadata verifier as it can catch more cases.
3193 */
3194 if (!class_type)
3195 return TRUE;
3196 /* NET 1.1 assemblies might encode string and object in a denormalized way.
3197 * See #675464.
3198 */
3199 if (class_type == type_type)
3200 return TRUE;
3201
3202 if (type_type == MONO_TYPE_CLASS)
3203 return class_type == MONO_TYPE_STRING || class_type == MONO_TYPE_OBJECT;
3204
3205 g_assert (type_type == MONO_TYPE_VALUETYPE);
3206 switch (class_type) {
3207 case MONO_TYPE_BOOLEAN:
3208 case MONO_TYPE_CHAR:
3209 case MONO_TYPE_I1:
3210 case MONO_TYPE_U1:
3211 case MONO_TYPE_I2:
3212 case MONO_TYPE_U2:
3213 case MONO_TYPE_I4:
3214 case MONO_TYPE_U4:
3215 case MONO_TYPE_I8:
3216 case MONO_TYPE_U8:
3217 case MONO_TYPE_R4:
3218 case MONO_TYPE_R8:
3219 case MONO_TYPE_I:
3220 case MONO_TYPE_U:
3221 case MONO_TYPE_CLASS:
3222 return TRUE;
3223 default:
3224 return FALSE;
3225 }
3226 }
3227
3228 /*
3229 * do_mono_metadata_parse_type:
3230 * @type: MonoType to be filled in with the return value
3231 * @m: image context
3232 * @generic_context: generics_context
3233 * @transient: whenever to allocate data from the heap
3234 * @ptr: pointer to the encoded type
3235 * @rptr: pointer where the end of the encoded type is saved
3236 *
3237 * Internal routine used to "fill" the contents of @type from an
3238 * allocated pointer. This is done this way to avoid doing too
3239 * many mini-allocations (particularly for the MonoFieldType which
3240 * most of the time is just a MonoType, but sometimes might be augmented).
3241 *
3242 * This routine is used by mono_metadata_parse_type and
3243 * mono_metadata_parse_field_type
3244 *
3245 * This extracts a Type as specified in Partition II (22.2.12)
3246 *
3247 * Returns: FALSE if the type could not be loaded
3248 */
3249 static gboolean
3250 do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
3251 gboolean transient, const char *ptr, const char **rptr)
3252 {
3253 gboolean ok = TRUE;
3254 type->type = mono_metadata_decode_value (ptr, &ptr);
3255
3256 switch (type->type){
3257 case MONO_TYPE_VOID:
3258 case MONO_TYPE_BOOLEAN:
3259 case MONO_TYPE_CHAR:
3260 case MONO_TYPE_I1:
3261 case MONO_TYPE_U1:
3262 case MONO_TYPE_I2:
3263 case MONO_TYPE_U2:
3264 case MONO_TYPE_I4:
3265 case MONO_TYPE_U4:
3266 case MONO_TYPE_I8:
3267 case MONO_TYPE_U8:
3268 case MONO_TYPE_R4:
3269 case MONO_TYPE_R8:
3270 case MONO_TYPE_I:
3271 case MONO_TYPE_U:
3272 case MONO_TYPE_STRING:
3273 case MONO_TYPE_OBJECT:
3274 case MONO_TYPE_TYPEDBYREF:
3275 break;
3276 case MONO_TYPE_VALUETYPE:
3277 case MONO_TYPE_CLASS: {
3278 guint32 token;
3279 MonoClass *class;
3280 MonoError error;
3281 token = mono_metadata_parse_typedef_or_ref (m, ptr, &ptr);
3282 class = mono_class_get_checked (m, token, &error);
3283 type->data.klass = class;
3284 if (!class) {
3285 mono_loader_set_error_from_mono_error (&error);
3286 mono_error_cleanup (&error); /*FIXME don't swallow the error message*/
3287 return FALSE;
3288 }
3289 if (!compare_type_literals (class->byval_arg.type, type->type))
3290 return FALSE;
3291 break;
3292 }
3293 case MONO_TYPE_SZARRAY: {
3294 MonoType *etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
3295 if (!etype)
3296 return FALSE;
3297 type->data.klass = mono_class_from_mono_type (etype);
3298 if (!type->data.klass)
3299 return FALSE;
3300 break;
3301 }
3302 case MONO_TYPE_PTR:
3303 type->data.type = mono_metadata_parse_type_internal (m, container, MONO_PARSE_MOD_TYPE, 0, transient, ptr, &ptr);
3304 if (!type->data.type)
3305 return FALSE;
3306 break;
3307 case MONO_TYPE_FNPTR: {
3308 MonoError error;
3309 type->data.method = mono_metadata_parse_method_signature_full (m, container, 0, ptr, &ptr, &error);
3310 if (!type->data.method) {
3311 mono_loader_set_error_from_mono_error (&error);
3312 mono_error_cleanup (&error); /*FIXME don't swallow the error message*/
3313 return FALSE;
3314 }
3315 break;
3316 }
3317 case MONO_TYPE_ARRAY:
3318 type->data.array = mono_metadata_parse_array_internal (m, container, transient, ptr, &ptr);
3319 if (!type->data.array)
3320 return FALSE;
3321 break;
3322 case MONO_TYPE_MVAR:
3323 if (container && !container->is_method)
3324 return FALSE;
3325 case MONO_TYPE_VAR:
3326 type->data.generic_param = mono_metadata_parse_generic_param (m, container, type->type, ptr, &ptr);
3327 if (!type->data.generic_param)
3328 return FALSE;
3329 break;
3330 case MONO_TYPE_GENERICINST:
3331 ok = do_mono_metadata_parse_generic_class (type, m, container, ptr, &ptr);
3332 break;
3333 default:
3334 g_warning ("type 0x%02x not handled in do_mono_metadata_parse_type on image %s", type->type, m->name);
3335 return FALSE;
3336 }
3337
3338 if (rptr)
3339 *rptr = ptr;
3340 return ok;
3341 }
3342
3343 /*
3344 * mono_metadata_free_type:
3345 * @type: type to free
3346 *
3347 * Free the memory allocated for type @type which is allocated on the heap.
3348 */
3349 void
3350 mono_metadata_free_type (MonoType *type)
3351 {
3352 if (type >= builtin_types && type < builtin_types + NBUILTIN_TYPES ())
3353 return;
3354
3355 switch (type->type){
3356 case MONO_TYPE_OBJECT:
3357 case MONO_TYPE_STRING:
3358 if (!type->data.klass)
3359 break;
3360 /* fall through */
3361 case MONO_TYPE_CLASS:
3362 case MONO_TYPE_VALUETYPE:
3363 if (type == &type->data.klass->byval_arg || type == &type->data.klass->this_arg)
3364 return;
3365 break;
3366 case MONO_TYPE_PTR:
3367 mono_metadata_free_type (type->data.type);
3368 break;
3369 case MONO_TYPE_FNPTR:
3370 mono_metadata_free_method_signature (type->data.method);
3371 break;
3372 case MONO_TYPE_ARRAY:
3373 mono_metadata_free_array (type->data.array);
3374 break;
3375 default:
3376 break;
3377 }
3378
3379 g_free (type);
3380 }
3381
3382 #if 0
3383 static void
3384 hex_dump (const char *buffer, int base, int count)
3385 {
3386 int show_header = 1;
3387 int i;
3388
3389 if (count < 0){
3390 count = -count;
3391 show_header = 0;
3392 }
3393
3394 for (i = 0; i < count; i++){
3395 if (show_header)
3396 if ((i % 16) == 0)
3397 printf ("\n0x%08x: ", (unsigned char) base + i);
3398
3399 printf ("%02x ", (unsigned char) (buffer [i]));
3400 }
3401 fflush (stdout);
3402 }
3403 #endif
3404
3405 /**
3406 * @ptr: Points to the beginning of the Section Data (25.3)
3407 */
3408 static MonoExceptionClause*
3409 parse_section_data (MonoImage *m, int *num_clauses, const unsigned char *ptr)
3410 {
3411 unsigned char sect_data_flags;
3412 int is_fat;
3413 guint32 sect_data_len;
3414 MonoExceptionClause* clauses = NULL;
3415
3416 while (1) {
3417 /* align on 32-bit boundary */
3418 ptr = dword_align (ptr);
3419 sect_data_flags = *ptr;
3420 ptr++;
3421
3422 is_fat = sect_data_flags & METHOD_HEADER_SECTION_FAT_FORMAT;
3423 if (is_fat) {
3424 sect_data_len = (ptr [2] << 16) | (ptr [1] << 8) | ptr [0];
3425 ptr += 3;
3426 } else {
3427 sect_data_len = ptr [0];
3428 ++ptr;
3429 }
3430
3431 if (sect_data_flags & METHOD_HEADER_SECTION_EHTABLE) {
3432 const unsigned char *p = dword_align (ptr);
3433 int i;
3434 *num_clauses = is_fat ? sect_data_len / 24: sect_data_len / 12;
3435 /* we could just store a pointer if we don't need to byteswap */
3436 clauses = g_malloc0 (sizeof (MonoExceptionClause) * (*num_clauses));
3437 for (i = 0; i < *num_clauses; ++i) {
3438 MonoExceptionClause *ec = &clauses [i];
3439 guint32 tof_value;
3440 if (is_fat) {
3441 ec->flags = read32 (p);
3442 ec->try_offset = read32 (p + 4);
3443 ec->try_len = read32 (p + 8);
3444 ec->handler_offset = read32 (p + 12);
3445 ec->handler_len = read32 (p + 16);
3446 tof_value = read32 (p + 20);
3447 p += 24;
3448 } else {
3449 ec->flags = read16 (p);
3450 ec->try_offset = read16 (p + 2);
3451 ec->try_len = *(p + 4);
3452 ec->handler_offset = read16 (p + 5);
3453 ec->handler_len = *(p + 7);
3454 tof_value = read32 (p + 8);
3455 p += 12;
3456 }
3457 if (ec->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
3458 ec->data.filter_offset = tof_value;
3459 } else if (ec->flags == MONO_EXCEPTION_CLAUSE_NONE) {
3460 ec->data.catch_class = NULL;
3461 if (tof_value) {
3462 MonoError error;
3463 ec->data.catch_class = mono_class_get_checked (m, tof_value, &error);
3464 if (!mono_error_ok (&error)) {
3465 mono_error_cleanup (&error); /* FIXME don't swallow the error */
3466 g_free (clauses);
3467 return NULL;
3468 }
3469 }
3470 } else {
3471 ec->data.catch_class = NULL;
3472 }
3473 /* g_print ("try %d: %x %04x-%04x %04x\n", i, ec->flags, ec->try_offset, ec->try_offset+ec->try_len, ec->try_len); */
3474 }
3475
3476 }
3477 if (sect_data_flags & METHOD_HEADER_SECTION_MORE_SECTS)
3478 ptr += sect_data_len - 4; /* LAMESPEC: it seems the size includes the header */
3479 else
3480 return clauses;
3481 }
3482 }
3483
3484 /*
3485 * mono_method_get_header_summary:
3486 * @method: The method to get the header.
3487 * @summary: Where to store the header
3488 *
3489 *
3490 * Returns: true if the header was properly decoded.
3491 */
3492 gboolean
3493 mono_method_get_header_summary (MonoMethod *method, MonoMethodHeaderSummary *summary)
3494 {
3495 int idx;
3496 guint32 rva;
3497 MonoImage* img;
3498 const char *ptr;
3499 unsigned char flags, format;
3500 guint16 fat_flags;
3501
3502 /*Only the GMD has a pointer to the metadata.*/
3503 while (method->is_inflated)
3504 method = ((MonoMethodInflated*)method)->declaring;
3505
3506 summary->code_size = 0;
3507 summary->has_clauses = FALSE;
3508
3509 /*FIXME extract this into a MACRO and share it with mono_method_get_header*/
3510 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))
3511 return FALSE;
3512
3513 if (method->wrapper_type != MONO_WRAPPER_NONE || method->sre_method) {
3514 MonoMethodHeader *header = ((MonoMethodWrapper *)method)->header;
3515 if (!header)
3516 return FALSE;
3517 summary->code_size = header->code_size;
3518 summary->has_clauses = header->num_clauses > 0;
3519 return TRUE;
3520 }
3521
3522
3523 idx = mono_metadata_token_index (method->token);
3524 img = method->klass->image;
3525 rva = mono_metadata_decode_row_col (&img->tables [MONO_TABLE_METHOD], idx - 1, MONO_METHOD_RVA);
3526
3527 /*We must run the verifier since we'll be decoding it.*/
3528 if (!mono_verifier_verify_method_header (img, rva, NULL))
3529 return FALSE;
3530
3531 ptr = mono_image_rva_map (img, rva);
3532 g_assert (ptr);
3533
3534 flags = *(const unsigned char *)ptr;
3535 format = flags & METHOD_HEADER_FORMAT_MASK;
3536
3537 switch (format) {
3538 case METHOD_HEADER_TINY_FORMAT:
3539 ptr++;
3540 summary->code_size = flags >> 2;
3541 break;
3542 case METHOD_HEADER_FAT_FORMAT:
3543 fat_flags = read16 (ptr);
3544 ptr += 4;
3545 summary->code_size = read32 (ptr);
3546 if (fat_flags & METHOD_HEADER_MORE_SECTS)
3547 summary->has_clauses = TRUE;
3548 break;
3549 default:
3550 return FALSE;
3551 }
3552 return TRUE;
3553 }
3554
3555 /*
3556 * mono_metadata_parse_mh_full:
3557 * @m: metadata context
3558 * @generic_context: generics context
3559 * @ptr: pointer to the method header.
3560 *
3561 * Decode the method header at @ptr, including pointer to the IL code,
3562 * info about local variables and optional exception tables.
3563 * This is a Mono runtime internal function.
3564 *
3565 * LOCKING: Acquires the loader lock.
3566 *
3567 * Returns: a transient MonoMethodHeader allocated from the heap.
3568 */
3569 MonoMethodHeader *
3570 mono_metadata_parse_mh_full (MonoImage *m, MonoGenericContainer *container, const char *ptr)
3571 {
3572 MonoMethodHeader *mh = NULL;
3573 unsigned char flags = *(const unsigned char *) ptr;
3574 unsigned char format = flags & METHOD_HEADER_FORMAT_MASK;
3575 guint16 fat_flags;
3576 guint32 local_var_sig_tok, max_stack, code_size, init_locals;
3577 const unsigned char *code;
3578 MonoExceptionClause* clauses = NULL;
3579 int num_clauses = 0;
3580 MonoTableInfo *t = &m->tables [MONO_TABLE_STANDALONESIG];
3581 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
3582
3583 g_return_val_if_fail (ptr != NULL, NULL);
3584
3585 switch (format) {
3586 case METHOD_HEADER_TINY_FORMAT:
3587 mh = g_malloc0 (MONO_SIZEOF_METHOD_HEADER);
3588 ptr++;
3589 mh->max_stack = 8;
3590 mh->is_transient = TRUE;
3591 local_var_sig_tok = 0;
3592 mh->code_size = flags >> 2;
3593 mh->code = (unsigned char*)ptr;
3594 return mh;
3595 case METHOD_HEADER_FAT_FORMAT:
3596 fat_flags = read16 (ptr);
3597 ptr += 2;
3598 max_stack = read16 (ptr);
3599 ptr += 2;
3600 code_size = read32 (ptr);
3601 ptr += 4;
3602 local_var_sig_tok = read32 (ptr);
3603 ptr += 4;
3604
3605 if (fat_flags & METHOD_HEADER_INIT_LOCALS)
3606 init_locals = 1;
3607 else
3608 init_locals = 0;
3609
3610 code = (unsigned char*)ptr;
3611
3612 if (!(fat_flags & METHOD_HEADER_MORE_SECTS))
3613 break;
3614
3615 /*
3616 * There are more sections
3617 */
3618 ptr = (char*)code + code_size;
3619 break;
3620 default:
3621 return NULL;
3622 }
3623
3624 if (local_var_sig_tok) {
3625 int idx = (local_var_sig_tok & 0xffffff)-1;
3626 if (idx >= t->rows || idx < 0)
3627 goto fail;
3628 mono_metadata_decode_row (t, idx, cols, 1);
3629
3630 if (!mono_verifier_verify_standalone_signature (m, cols [MONO_STAND_ALONE_SIGNATURE], NULL))
3631 goto fail;
3632 }
3633 if (fat_flags & METHOD_HEADER_MORE_SECTS)
3634 clauses = parse_section_data (m, &num_clauses, (const unsigned char*)ptr);
3635 if (local_var_sig_tok) {
3636 const char *locals_ptr;
3637 int len=0, i;
3638
3639 locals_ptr = mono_metadata_blob_heap (m, cols [MONO_STAND_ALONE_SIGNATURE]);
3640 mono_metadata_decode_blob_size (locals_ptr, &locals_ptr);
3641 if (*locals_ptr != 0x07)
3642 g_warning ("wrong signature for locals blob");
3643 locals_ptr++;
3644 len = mono_metadata_decode_value (locals_ptr, &locals_ptr);
3645 mh = g_malloc0 (MONO_SIZEOF_METHOD_HEADER + len * sizeof (MonoType*) + num_clauses * sizeof (MonoExceptionClause));
3646 mh->num_locals = len;
3647 for (i = 0; i < len; ++i) {
3648 mh->locals [i] = mono_metadata_parse_type_internal (m, container,
3649 MONO_PARSE_LOCAL, 0, TRUE, locals_ptr, &locals_ptr);
3650 if (!mh->locals [i])
3651 goto fail;
3652 }
3653 } else {
3654 mh = g_malloc0 (MONO_SIZEOF_METHOD_HEADER + num_clauses * sizeof (MonoExceptionClause));
3655 }
3656 mh->code = code;
3657 mh->code_size = code_size;
3658 mh->max_stack = max_stack;
3659 mh->is_transient = TRUE;
3660 mh->init_locals = init_locals;
3661 if (clauses) {
3662 MonoExceptionClause* clausesp = (MonoExceptionClause*)&mh->locals [mh->num_locals];
3663 memcpy (clausesp, clauses, num_clauses * sizeof (MonoExceptionClause));
3664 g_free (clauses);
3665 mh->clauses = clausesp;
3666 mh->num_clauses = num_clauses;
3667 }
3668 return mh;
3669 fail:
3670 g_free (clauses);
3671 g_free (mh);
3672 return NULL;
3673
3674 }
3675
3676 /*
3677 * mono_metadata_parse_mh:
3678 * @generic_context: generics context
3679 * @ptr: pointer to the method header.
3680 *
3681 * Decode the method header at @ptr, including pointer to the IL code,
3682 * info about local variables and optional exception tables.
3683 *
3684 * Returns: a transient MonoMethodHeader allocated from the heap.
3685 */
3686 MonoMethodHeader *
3687 mono_metadata_parse_mh (MonoImage *m, const char *ptr)
3688 {
3689 return mono_metadata_parse_mh_full (m, NULL, ptr);
3690 }
3691
3692 /*
3693 * mono_metadata_free_mh:
3694 * @mh: a method header
3695 *
3696 * Free the memory allocated for the method header.
3697 */
3698 void
3699 mono_metadata_free_mh (MonoMethodHeader *mh)
3700 {
3701 int i;
3702
3703 /* If it is not transient it means it's part of a wrapper method,
3704 * or a SRE-generated method, so the lifetime in that case is
3705 * dictated by the method's own lifetime
3706 */
3707 if (mh->is_transient) {
3708 for (i = 0; i < mh->num_locals; ++i)
3709 mono_metadata_free_type (mh->locals [i]);
3710 g_free (mh);
3711 }
3712 }
3713
3714 /*
3715 * mono_method_header_get_code:
3716 * @header: a MonoMethodHeader pointer
3717 * @code_size: memory location for returning the code size
3718 * @max_stack: memory location for returning the max stack
3719 *
3720 * Method header accessor to retreive info about the IL code properties:
3721 * a pointer to the IL code itself, the size of the code and the max number
3722 * of stack slots used by the code.
3723 *
3724 * Returns: pointer to the IL code represented by the method header.
3725 */
3726 const unsigned char*
3727 mono_method_header_get_code (MonoMethodHeader *header, guint32* code_size, guint32* max_stack)
3728 {
3729 if (code_size)
3730 *code_size = header->code_size;
3731 if (max_stack)
3732 *max_stack = header->max_stack;
3733 return header->code;
3734 }
3735
3736 /*
3737 * mono_method_header_get_locals:
3738 * @header: a MonoMethodHeader pointer
3739 * @num_locals: memory location for returning the number of local variables
3740 * @init_locals: memory location for returning the init_locals flag
3741 *
3742 * Method header accessor to retreive info about the local variables:
3743 * an array of local types, the number of locals and whether the locals
3744 * are supposed to be initialized to 0 on method entry
3745 *
3746 * Returns: pointer to an array of types of the local variables
3747 */
3748 MonoType**
3749 mono_method_header_get_locals (MonoMethodHeader *header, guint32* num_locals, gboolean *init_locals)
3750 {
3751 if (num_locals)
3752 *num_locals = header->num_locals;
3753 if (init_locals)
3754 *init_locals = header->init_locals;
3755 return header->locals;
3756 }
3757
3758 /*
3759 * mono_method_header_get_num_clauses:
3760 * @header: a MonoMethodHeader pointer
3761 *
3762 * Method header accessor to retreive the number of exception clauses.
3763 *
3764 * Returns: the number of exception clauses present
3765 */
3766 int
3767 mono_method_header_get_num_clauses (MonoMethodHeader *header)
3768 {
3769 return header->num_clauses;
3770 }
3771
3772 /*
3773 * mono_method_header_get_clauses:
3774 * @header: a MonoMethodHeader pointer
3775 * @method: MonoMethod the header belongs to
3776 * @iter: pointer to a iterator
3777 * @clause: pointer to a MonoExceptionClause structure which will be filled with the info
3778 *
3779 * Get the info about the exception clauses in the method. Set *iter to NULL to
3780 * initiate the iteration, then call the method repeatedly until it returns FALSE.
3781 * At each iteration, the structure pointed to by clause if filled with the
3782 * exception clause information.
3783 *
3784 * Returns: TRUE if clause was filled with info, FALSE if there are no more exception
3785 * clauses.
3786 */
3787 int
3788 mono_method_header_get_clauses (MonoMethodHeader *header, MonoMethod *method, gpointer *iter, MonoExceptionClause *clause)
3789 {
3790 MonoExceptionClause *sc;
3791 /* later we'll be able to use this interface to parse the clause info on demand,
3792 * without allocating anything.
3793 */
3794 if (!iter || !header->num_clauses)
3795 return FALSE;
3796 if (!*iter) {
3797 *iter = sc = header->clauses;
3798 *clause = *sc;
3799 return TRUE;
3800 }
3801 sc = *iter;
3802 sc++;
3803 if (sc < header->clauses + header->num_clauses) {
3804 *iter = sc;
3805 *clause = *sc;
3806 return TRUE;
3807 }
3808 return FALSE;
3809 }
3810
3811 /**
3812 * mono_metadata_parse_field_type:
3813 * @m: metadata context to extract information from
3814 * @ptr: pointer to the field signature
3815 * @rptr: pointer updated to match the end of the decoded stream
3816 *
3817 * Parses the field signature, and returns the type information for it.
3818 *
3819 * Returns: The MonoType that was extracted from @ptr.
3820 */
3821 MonoType *
3822 mono_metadata_parse_field_type (MonoImage *m, short field_flags, const char *ptr, const char **rptr)
3823 {
3824 return mono_metadata_parse_type (m, MONO_PARSE_FIELD, field_flags, ptr, rptr);
3825 }
3826
3827 /**
3828 * mono_metadata_parse_param:
3829 * @m: metadata context to extract information from
3830 * @ptr: pointer to the param signature
3831 * @rptr: pointer updated to match the end of the decoded stream
3832 *
3833 * Parses the param signature, and returns the type information for it.
3834 *
3835 * Returns: The MonoType that was extracted from @ptr.
3836 */
3837 MonoType *
3838 mono_metadata_parse_param (MonoImage *m, const char *ptr, const char **rptr)
3839 {
3840 return mono_metadata_parse_type (m, MONO_PARSE_PARAM, 0, ptr, rptr);
3841 }
3842
3843 /*
3844 * mono_metadata_token_from_dor:
3845 * @dor_token: A TypeDefOrRef coded index
3846 *
3847 * dor_token is a TypeDefOrRef coded index: it contains either
3848 * a TypeDef, TypeRef or TypeSpec in the lower bits, and the upper
3849 * bits contain an index into the table.
3850 *
3851 * Returns: an expanded token
3852 */
3853 guint32
3854 mono_metadata_token_from_dor (guint32 dor_index)
3855 {
3856 guint32 table, idx;
3857
3858 table = dor_index & 0x03;
3859 idx = dor_index >> 2;
3860
3861 switch (table){
3862 case 0: /* TypeDef */
3863 return MONO_TOKEN_TYPE_DEF | idx;
3864 case 1: /* TypeRef */
3865 return MONO_TOKEN_TYPE_REF | idx;
3866 case 2: /* TypeSpec */
3867 return MONO_TOKEN_TYPE_SPEC | idx;
3868 default:
3869 g_assert_not_reached ();
3870 }
3871
3872 return 0;
3873 }
3874
3875 /*
3876 * We use this to pass context information to the row locator
3877 */
3878 typedef struct {
3879 int idx; /* The index that we are trying to locate */
3880 int col_idx; /* The index in the row where idx may be stored */
3881 MonoTableInfo *t; /* pointer to the table */
3882 guint32 result;
3883 } locator_t;
3884
3885 /*
3886 * How the row locator works.
3887 *
3888 * Table A
3889 * ___|___
3890 * ___|___ Table B
3891 * ___|___------> _______
3892 * ___|___ _______
3893 *
3894 * A column in the rows of table A references an index in table B.
3895 * For example A may be the TYPEDEF table and B the METHODDEF table.
3896 *
3897 * Given an index in table B we want to get the row in table A
3898 * where the column n references our index in B.
3899 *
3900 * In the locator_t structure:
3901 * t is table A
3902 * col_idx is the column number
3903 * index is the index in table B
3904 * result will be the index in table A
3905 *
3906 * Examples:
3907 * Table A Table B column (in table A)
3908 * TYPEDEF METHODDEF MONO_TYPEDEF_METHOD_LIST
3909 * TYPEDEF FIELD MONO_TYPEDEF_FIELD_LIST
3910 * PROPERTYMAP PROPERTY MONO_PROPERTY_MAP_PROPERTY_LIST
3911 * INTERFIMPL TYPEDEF MONO_INTERFACEIMPL_CLASS
3912 * METHODSEM PROPERTY ASSOCIATION (encoded index)
3913 *
3914 * Note that we still don't support encoded indexes.
3915 *
3916 */
3917 static int
3918 typedef_locator (const void *a, const void *b)
3919 {
3920 locator_t *loc = (locator_t *) a;
3921 const char *bb = (const char *) b;
3922 int typedef_index = (bb - loc->t->base) / loc->t->row_size;
3923 guint32 col, col_next;
3924
3925 col = mono_metadata_decode_row_col (loc->t, typedef_index, loc->col_idx);
3926
3927 if (loc->idx < col)
3928 return -1;
3929
3930 /*
3931 * Need to check that the next row is valid.
3932 */
3933 if (typedef_index + 1 < loc->t->rows) {
3934 col_next = mono_metadata_decode_row_col (loc->t, typedef_index + 1, loc->col_idx);
3935 if (loc->idx >= col_next)
3936 return 1;
3937
3938 if (col == col_next)
3939 return 1;
3940 }
3941
3942 loc->result = typedef_index;
3943
3944 return 0;
3945 }
3946
3947 static int
3948 table_locator (const void *a, const void *b)
3949 {
3950 locator_t *loc = (locator_t *) a;
3951 const char *bb = (const char *) b;
3952 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
3953 guint32 col;
3954
3955 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
3956
3957 if (loc->idx == col) {
3958 loc->result = table_index;
3959 return 0;
3960 }
3961 if (loc->idx < col)
3962 return -1;
3963 else
3964 return 1;
3965 }
3966
3967 static int
3968 declsec_locator (const void *a, const void *b)
3969 {
3970 locator_t *loc = (locator_t *) a;
3971 const char *bb = (const char *) b;
3972 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
3973 guint32 col;
3974
3975 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
3976
3977 if (loc->idx == col) {
3978 loc->result = table_index;
3979 return 0;
3980 }
3981 if (loc->idx < col)
3982 return -1;
3983 else
3984 return 1;
3985 }
3986
3987 /**
3988 * search_ptr_table:
3989 *
3990 * Return the 1-based row index in TABLE, which must be one of the *Ptr tables,
3991 * which contains IDX.
3992 */
3993 static guint32
3994 search_ptr_table (MonoImage *image, int table, int idx)
3995 {
3996 MonoTableInfo *ptrdef = &image->tables [table];
3997 int i;
3998
3999 /* Use a linear search to find our index in the table */
4000 for (i = 0; i < ptrdef->rows; i ++)
4001 /* All the Ptr tables have the same structure */
4002 if (mono_metadata_decode_row_col (ptrdef, i, 0) == idx)
4003 break;
4004
4005 if (i < ptrdef->rows)
4006 return i + 1;
4007 else
4008 return idx;
4009 }
4010
4011 /**
4012 * mono_metadata_typedef_from_field:
4013 * @meta: metadata context
4014 * @index: FieldDef token
4015 *
4016 * Returns: the 1-based index into the TypeDef table of the type that
4017 * declared the field described by @index, or 0 if not found.
4018 */
4019 guint32
4020 mono_metadata_typedef_from_field (MonoImage *meta, guint32 index)
4021 {
4022 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
4023 locator_t loc;
4024
4025 if (!tdef->base)
4026 return 0;
4027
4028 loc.idx = mono_metadata_token_index (index);
4029 loc.col_idx = MONO_TYPEDEF_FIELD_LIST;
4030 loc.t = tdef;
4031
4032 if (meta->uncompressed_metadata)
4033 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
4034
4035 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
4036 return 0;
4037
4038 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4039 return loc.result + 1;
4040 }
4041
4042 /*
4043 * mono_metadata_typedef_from_method:
4044 * @meta: metadata context
4045 * @index: MethodDef token
4046 *
4047 * Returns: the 1-based index into the TypeDef table of the type that
4048 * declared the method described by @index. 0 if not found.
4049 */
4050 guint32
4051 mono_metadata_typedef_from_method (MonoImage *meta, guint32 index)
4052 {
4053 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
4054 locator_t loc;
4055
4056 if (!tdef->base)
4057 return 0;
4058
4059 loc.idx = mono_metadata_token_index (index);
4060 loc.col_idx = MONO_TYPEDEF_METHOD_LIST;
4061 loc.t = tdef;
4062
4063 if (meta->uncompressed_metadata)
4064 loc.idx = search_ptr_table (meta, MONO_TABLE_METHOD_POINTER, loc.idx);
4065
4066 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
4067 return 0;
4068
4069 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4070 return loc.result + 1;
4071 }
4072
4073 /*
4074 * mono_metadata_interfaces_from_typedef_full:
4075 * @meta: metadata context
4076 * @index: typedef token
4077 * @interfaces: Out parameter used to store the interface array
4078 * @count: Out parameter used to store the number of interfaces
4079 * @heap_alloc_result: if TRUE the result array will be g_malloc'd
4080 * @context: The generic context
4081 *
4082 * The array of interfaces that the @index typedef token implements is returned in
4083 * @interfaces. The number of elements in the array is returned in @count.
4084 *
4085
4086 * Returns: TRUE on success, FALSE on failure.
4087 */
4088 gboolean
4089 mono_metadata_interfaces_from_typedef_full (MonoImage *meta, guint32 index, MonoClass ***interfaces, guint *count, gboolean heap_alloc_result, MonoGenericContext *context, MonoError *error)
4090 {
4091 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_INTERFACEIMPL];
4092 locator_t loc;
4093 guint32 start, pos;
4094 guint32 cols [MONO_INTERFACEIMPL_SIZE];
4095 MonoClass **result;
4096
4097 *interfaces = NULL;
4098 *count = 0;
4099
4100 mono_error_init (error);
4101
4102 if (!tdef->base)
4103 return TRUE;
4104
4105 loc.idx = mono_metadata_token_index (index);
4106 loc.col_idx = MONO_INTERFACEIMPL_CLASS;
4107 loc.t = tdef;
4108
4109 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4110 return TRUE;
4111
4112 start = loc.result;
4113 /*
4114 * We may end up in the middle of the rows...
4115 */
4116 while (start > 0) {
4117 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_INTERFACEIMPL_CLASS))
4118 start--;
4119 else
4120 break;
4121 }
4122 pos = start;
4123 while (pos < tdef->rows) {
4124 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
4125 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
4126 break;
4127 ++pos;
4128 }
4129
4130 if (heap_alloc_result)
4131 result = g_new0 (MonoClass*, pos - start);
4132 else
4133 result = mono_image_alloc0 (meta, sizeof (MonoClass*) * (pos - start));
4134
4135 pos = start;
4136 while (pos < tdef->rows) {
4137 MonoClass *iface;
4138
4139 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
4140 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
4141 break;
4142 iface = mono_class_get_and_inflate_typespec_checked (
4143 meta, mono_metadata_token_from_dor (cols [MONO_INTERFACEIMPL_INTERFACE]), context, error);
4144 if (iface == NULL)
4145 return FALSE;
4146 result [pos - start] = iface;
4147 ++pos;
4148 }
4149 *count = pos - start;
4150 *interfaces = result;
4151 return TRUE;
4152 }
4153
4154 /*
4155 * @meta: metadata context
4156 * @index: typedef token
4157 * @count: Out parameter used to store the number of interfaces
4158 *
4159 * The array of interfaces that the @index typedef token implements is returned in
4160 * @interfaces. The number of elements in the array is returned in @count. The returned
4161 * array is g_malloc'd and the caller must free it.
4162 *
4163 * LOCKING: Acquires the loader lock .
4164 *
4165 * Returns: the interface array on success, NULL on failure.
4166 */
4167
4168 MonoClass**
4169 mono_metadata_interfaces_from_typedef (MonoImage *meta, guint32 index, guint *count)
4170 {
4171 MonoError error;
4172 MonoClass **interfaces = NULL;
4173 gboolean rv;
4174
4175 rv = mono_metadata_interfaces_from_typedef_full (meta, index, &interfaces, count, TRUE, NULL, &error);
4176 g_assert (mono_error_ok (&error)); /* FIXME dont swallow the error */
4177 if (rv)
4178 return interfaces;
4179 else
4180 return NULL;
4181 }
4182
4183 /*
4184 * mono_metadata_nested_in_typedef:
4185 * @meta: metadata context
4186 * @index: typedef token
4187 *
4188 * Returns: the 1-based index into the TypeDef table of the type
4189 * where the type described by @index is nested.
4190 * Returns 0 if @index describes a non-nested type.
4191 */
4192 guint32
4193 mono_metadata_nested_in_typedef (MonoImage *meta, guint32 index)
4194 {
4195 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
4196 locator_t loc;
4197
4198 if (!tdef->base)
4199 return 0;
4200
4201 loc.idx = mono_metadata_token_index (index);
4202 loc.col_idx = MONO_NESTED_CLASS_NESTED;
4203 loc.t = tdef;
4204
4205 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4206 return 0;
4207
4208 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4209 return mono_metadata_decode_row_col (tdef, loc.result, MONO_NESTED_CLASS_ENCLOSING) | MONO_TOKEN_TYPE_DEF;
4210 }
4211
4212 /*
4213 * mono_metadata_nesting_typedef:
4214 * @meta: metadata context
4215 * @index: typedef token
4216 *
4217 * Returns: the 1-based index into the TypeDef table of the first type
4218 * that is nested inside the type described by @index. The search starts at
4219 * @start_index. returns 0 if no such type is found.
4220 */
4221 guint32
4222 mono_metadata_nesting_typedef (MonoImage *meta, guint32 index, guint32 start_index)
4223 {
4224 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
4225 guint32 start;
4226 guint32 class_index = mono_metadata_token_index (index);
4227
4228 if (!tdef->base)
4229 return 0;
4230
4231 start = start_index;
4232
4233 while (start <= tdef->rows) {
4234 if (class_index == mono_metadata_decode_row_col (tdef, start - 1, MONO_NESTED_CLASS_ENCLOSING))
4235 break;
4236 else
4237 start++;
4238 }
4239
4240 if (start > tdef->rows)
4241 return 0;
4242 else
4243 return start;
4244 }
4245
4246 /*
4247 * mono_metadata_packing_from_typedef:
4248 * @meta: metadata context
4249 * @index: token representing a type
4250 *
4251 * Returns: the info stored in the ClassLAyout table for the given typedef token
4252 * into the @packing and @size pointers.
4253 * Returns 0 if the info is not found.
4254 */
4255 guint32
4256 mono_metadata_packing_from_typedef (MonoImage *meta, guint32 index, guint32 *packing, guint32 *size)
4257 {
4258 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CLASSLAYOUT];
4259 locator_t loc;
4260 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
4261
4262 if (!tdef->base)
4263 return 0;
4264
4265 loc.idx = mono_metadata_token_index (index);
4266 loc.col_idx = MONO_CLASS_LAYOUT_PARENT;
4267 loc.t = tdef;
4268
4269 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4270 return 0;
4271
4272 mono_metadata_decode_row (tdef, loc.result, cols, MONO_CLASS_LAYOUT_SIZE);
4273 if (packing)
4274 *packing = cols [MONO_CLASS_LAYOUT_PACKING_SIZE];
4275 if (size)
4276 *size = cols [MONO_CLASS_LAYOUT_CLASS_SIZE];
4277
4278 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4279 return loc.result + 1;
4280 }
4281
4282 /*
4283 * mono_metadata_custom_attrs_from_index:
4284 * @meta: metadata context
4285 * @index: token representing the parent
4286 *
4287 * Returns: the 1-based index into the CustomAttribute table of the first
4288 * attribute which belongs to the metadata object described by @index.
4289 * Returns 0 if no such attribute is found.
4290 */
4291 guint32
4292 mono_metadata_custom_attrs_from_index (MonoImage *meta, guint32 index)
4293 {
4294 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CUSTOMATTRIBUTE];
4295 locator_t loc;
4296
4297 if (!tdef->base)
4298 return 0;
4299
4300 loc.idx = index;
4301 loc.col_idx = MONO_CUSTOM_ATTR_PARENT;
4302 loc.t = tdef;
4303
4304 /* FIXME: Index translation */
4305
4306 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4307 return 0;
4308
4309 /* Find the first entry by searching backwards */
4310 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_CUSTOM_ATTR_PARENT) == index))
4311 loc.result --;
4312
4313 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
4314 return loc.result + 1;
4315 }
4316
4317 /*
4318 * mono_metadata_declsec_from_index:
4319 * @meta: metadata context
4320 * @index: token representing the parent
4321 *
4322 * Returns: the 0-based index into the DeclarativeSecurity table of the first
4323 * attribute which belongs to the metadata object described by @index.
4324 * Returns -1 if no such attribute is found.
4325 */
4326 guint32
4327 mono_metadata_declsec_from_index (MonoImage *meta, guint32 index)
4328 {
4329 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_DECLSECURITY];
4330 locator_t loc;
4331
4332 if (!tdef->base)
4333 return -1;
4334
4335 loc.idx = index;
4336 loc.col_idx = MONO_DECL_SECURITY_PARENT;
4337 loc.t = tdef;
4338
4339 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, declsec_locator))
4340 return -1;
4341
4342 /* Find the first entry by searching backwards */
4343 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_DECL_SECURITY_PARENT) == index))
4344 loc.result --;
4345
4346 return loc.result;
4347 }
4348
4349 /*
4350 * mono_metadata_localscope_from_methoddef:
4351 * @meta: metadata context
4352 * @index: methoddef index
4353 *
4354 * Returns: the 1-based index into the LocalScope table of the first
4355 * scope which belongs to the method described by @index.
4356 * Returns 0 if no such row is found.
4357 */
4358 guint32
4359 mono_metadata_localscope_from_methoddef (MonoImage *meta, guint32 index)
4360 {
4361 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_LOCALSCOPE];
4362 locator_t loc;
4363
4364 if (!tdef->base)
4365 return 0;
4366
4367 loc.idx = index;
4368 loc.col_idx = MONO_LOCALSCOPE_METHOD;
4369 loc.t = tdef;
4370
4371 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4372 return 0;
4373
4374 /* Find the first entry by searching backwards */
4375 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_LOCALSCOPE_METHOD) == index))
4376 loc.result --;
4377
4378 return loc.result + 1;
4379 }
4380
4381 #ifdef DEBUG
4382 static void
4383 mono_backtrace (int limit)
4384 {
4385 void *array[limit];
4386 char **names;
4387 int i;
4388 backtrace (array, limit);
4389 names = backtrace_symbols (array, limit);
4390 for (i =0; i < limit; ++i) {
4391 g_print ("\t%s\n", names [i]);
4392 }
4393 g_free (names);
4394 }
4395 #endif
4396
4397 static int i8_align;
4398
4399 /*
4400 * mono_type_set_alignment:
4401 *
4402 * Set the alignment used by runtime to layout fields etc. of type TYPE to ALIGN.
4403 * This should only be used in AOT mode since the resulting layout will not match the
4404 * host abi layout.
4405 */
4406 void
4407 mono_type_set_alignment (MonoTypeEnum type, int align)
4408 {
4409 /* Support only a few types whose alignment is abi dependent */
4410 switch (type) {
4411 case MONO_TYPE_I8:
4412 i8_align = align;
4413 break;
4414 default:
4415 g_assert_not_reached ();
4416 break;
4417 }
4418 }
4419
4420 /*
4421 * mono_type_size:
4422 * @t: the type to return the size of
4423 *
4424 * Returns: the number of bytes required to hold an instance of this
4425 * type in memory
4426 */
4427 int
4428 mono_type_size (MonoType *t, int *align)
4429 {
4430 MonoTypeEnum simple_type;
4431
4432 if (!t) {
4433 *align = 1;
4434 return 0;
4435 }
4436 if (t->byref) {
4437 *align = MONO_ABI_ALIGNOF (gpointer);
4438 return sizeof (gpointer);
4439 }
4440
4441 simple_type = t->type;
4442 again:
4443 switch (simple_type) {
4444 case MONO_TYPE_VOID:
4445 *align = 1;
4446 return 0;
4447 case MONO_TYPE_BOOLEAN:
4448 *align = MONO_ABI_ALIGNOF (gint8);
4449 return 1;
4450 case MONO_TYPE_I1:
4451 case MONO_TYPE_U1:
4452 *align = MONO_ABI_ALIGNOF (gint8);
4453 return 1;
4454 case MONO_TYPE_CHAR:
4455 case MONO_TYPE_I2:
4456 case MONO_TYPE_U2:
4457 *align = MONO_ABI_ALIGNOF (gint16);
4458 return 2;
4459 case MONO_TYPE_I4:
4460 case MONO_TYPE_U4:
4461 *align = MONO_ABI_ALIGNOF (gint32);
4462 return 4;
4463 case MONO_TYPE_R4:
4464 *align = MONO_ABI_ALIGNOF (float);
4465 return 4;
4466 case MONO_TYPE_I8:
4467 case MONO_TYPE_U8:
4468 *align = MONO_ABI_ALIGNOF (gint64);
4469 return 8;
4470 case MONO_TYPE_R8:
4471 *align = MONO_ABI_ALIGNOF (double);
4472 return 8;
4473 case MONO_TYPE_I:
4474 case MONO_TYPE_U:
4475 *align = MONO_ABI_ALIGNOF (gpointer);
4476 return sizeof (gpointer);
4477 case MONO_TYPE_STRING:
4478 *align = MONO_ABI_ALIGNOF (gpointer);
4479 return sizeof (gpointer);
4480 case MONO_TYPE_OBJECT:
4481 *align = MONO_ABI_ALIGNOF (gpointer);
4482 return sizeof (gpointer);
4483 case MONO_TYPE_VALUETYPE: {
4484 if (t->data.klass->enumtype)
4485 return mono_type_size (mono_class_enum_basetype (t->data.klass), align);
4486 else
4487 return mono_class_value_size (t->data.klass, (guint32*)align);
4488 }
4489 case MONO_TYPE_CLASS:
4490 case MONO_TYPE_SZARRAY:
4491 case MONO_TYPE_PTR:
4492 case MONO_TYPE_FNPTR:
4493 case MONO_TYPE_ARRAY:
4494 *align = MONO_ABI_ALIGNOF (gpointer);
4495 return sizeof (gpointer);
4496 case MONO_TYPE_TYPEDBYREF:
4497 return mono_class_value_size (mono_defaults.typed_reference_class, (guint32*)align);
4498 case MONO_TYPE_GENERICINST: {
4499 MonoGenericClass *gclass = t->data.generic_class;
4500 MonoClass *container_class = gclass->container_class;
4501
4502 // g_assert (!gclass->inst->is_open);
4503
4504 if (container_class->valuetype) {
4505 if (container_class->enumtype)
4506 return mono_type_size (mono_class_enum_basetype (container_class), align);
4507 else
4508 return mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
4509 } else {
4510 *align = MONO_ABI_ALIGNOF (gpointer);
4511 return sizeof (gpointer);
4512 }
4513 }
4514 case MONO_TYPE_VAR:
4515 case MONO_TYPE_MVAR:
4516 if (!t->data.generic_param->gshared_constraint || t->data.generic_param->gshared_constraint->type == MONO_TYPE_VALUETYPE) {
4517 *align = MONO_ABI_ALIGNOF (gpointer);
4518 return sizeof (gpointer);
4519 } else {
4520 /* The gparam can only match types given by gshared_constraint */
4521 return mono_type_size (t->data.generic_param->gshared_constraint, align);
4522 goto again;
4523 }
4524 default:
4525 g_error ("mono_type_size: type 0x%02x unknown", t->type);
4526 }
4527 return 0;
4528 }
4529
4530 /*
4531 * mono_type_stack_size:
4532 * @t: the type to return the size it uses on the stack
4533 *
4534 * Returns: the number of bytes required to hold an instance of this
4535 * type on the runtime stack
4536 */
4537 int
4538 mono_type_stack_size (MonoType *t, int *align)
4539 {
4540 return mono_type_stack_size_internal (t, align, FALSE);
4541 }
4542
4543 int
4544 mono_type_stack_size_internal (MonoType *t, int *align, gboolean allow_open)
4545 {
4546 int tmp;
4547 MonoTypeEnum simple_type;
4548 #if SIZEOF_VOID_P == SIZEOF_REGISTER
4549 int stack_slot_size = sizeof (gpointer);
4550 int stack_slot_align = MONO_ABI_ALIGNOF (gpointer);
4551 #elif SIZEOF_VOID_P < SIZEOF_REGISTER
4552 int stack_slot_size = SIZEOF_REGISTER;
4553 int stack_slot_align = SIZEOF_REGISTER;
4554 #endif
4555
4556 g_assert (t != NULL);
4557
4558 if (!align)
4559 align = &tmp;
4560
4561 if (t->byref) {
4562 *align = stack_slot_align;
4563 return stack_slot_size;
4564 }
4565
4566 simple_type = t->type;
4567 switch (simple_type) {
4568 case MONO_TYPE_BOOLEAN:
4569 case MONO_TYPE_CHAR:
4570 case MONO_TYPE_I1:
4571 case MONO_TYPE_U1:
4572 case MONO_TYPE_I2:
4573 case MONO_TYPE_U2:
4574 case MONO_TYPE_I4:
4575 case MONO_TYPE_U4:
4576 case MONO_TYPE_I:
4577 case MONO_TYPE_U:
4578 case MONO_TYPE_STRING:
4579 case MONO_TYPE_OBJECT:
4580 case MONO_TYPE_CLASS:
4581 case MONO_TYPE_SZARRAY:
4582 case MONO_TYPE_PTR:
4583 case MONO_TYPE_FNPTR:
4584 case MONO_TYPE_ARRAY:
4585 *align = stack_slot_align;
4586 return stack_slot_size;
4587 case MONO_TYPE_VAR:
4588 case MONO_TYPE_MVAR:
4589 g_assert (allow_open);
4590 if (!t->data.generic_param->gshared_constraint || t->data.generic_param->gshared_constraint->type == MONO_TYPE_VALUETYPE) {
4591 *align = stack_slot_align;
4592 return stack_slot_size;
4593 } else {
4594 /* The gparam can only match types given by gshared_constraint */
4595 return mono_type_stack_size_internal (t->data.generic_param->gshared_constraint, align, allow_open);
4596 }
4597 case MONO_TYPE_TYPEDBYREF:
4598 *align = stack_slot_align;
4599 return stack_slot_size * 3;
4600 case MONO_TYPE_R4:
4601 *align = MONO_ABI_ALIGNOF (float);
4602 return sizeof (float);
4603 case MONO_TYPE_I8:
4604 case MONO_TYPE_U8:
4605 *align = MONO_ABI_ALIGNOF (gint64);
4606 return sizeof (gint64);
4607 case MONO_TYPE_R8:
4608 *align = MONO_ABI_ALIGNOF (double);
4609 return sizeof (double);
4610 case MONO_TYPE_VALUETYPE: {
4611 guint32 size;
4612
4613 if (t->data.klass->enumtype)
4614 return mono_type_stack_size_internal (mono_class_enum_basetype (t->data.klass), align, allow_open);
4615 else {
4616 size = mono_class_value_size (t->data.klass, (guint32*)align);
4617
4618 *align = *align + stack_slot_align - 1;
4619 *align &= ~(stack_slot_align - 1);
4620
4621 size += stack_slot_size - 1;
4622 size &= ~(stack_slot_size - 1);
4623
4624 return size;
4625 }
4626 }
4627 case MONO_TYPE_GENERICINST: {
4628 MonoGenericClass *gclass = t->data.generic_class;
4629 MonoClass *container_class = gclass->container_class;
4630
4631 if (!allow_open)
4632 g_assert (!gclass->context.class_inst->is_open);
4633
4634 if (container_class->valuetype) {
4635 if (container_class->enumtype)
4636 return mono_type_stack_size_internal (mono_class_enum_basetype (container_class), align, allow_open);
4637 else {
4638 guint32 size = mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
4639
4640 *align = *align + stack_slot_align - 1;
4641 *align &= ~(stack_slot_align - 1);
4642
4643 size += stack_slot_size - 1;
4644 size &= ~(stack_slot_size - 1);
4645
4646 return size;
4647 }
4648 } else {
4649 *align = stack_slot_align;
4650 return stack_slot_size;
4651 }
4652 }
4653 default:
4654 g_error ("type 0x%02x unknown", t->type);
4655 }
4656 return 0;
4657 }
4658
4659 gboolean
4660 mono_type_generic_inst_is_valuetype (MonoType *type)
4661 {
4662 g_assert (type->type == MONO_TYPE_GENERICINST);
4663 return type->data.generic_class->container_class->valuetype;
4664 }
4665
4666 gboolean
4667 mono_metadata_generic_class_is_valuetype (MonoGenericClass *gclass)
4668 {
4669 return gclass->container_class->valuetype;
4670 }
4671
4672 static gboolean
4673 _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2, gboolean signature_only)
4674 {
4675 MonoGenericInst *i1 = g1->context.class_inst;
4676 MonoGenericInst *i2 = g2->context.class_inst;
4677
4678 if (g1->is_dynamic != g2->is_dynamic)
4679 return FALSE;
4680 if (!mono_metadata_class_equal (g1->container_class, g2->container_class, signature_only))
4681 return FALSE;
4682 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
4683 return FALSE;
4684 return g1->is_tb_open == g2->is_tb_open;
4685 }
4686
4687 static gboolean
4688 _mono_metadata_generic_class_container_equal (const MonoGenericClass *g1, MonoClass *c2, gboolean signature_only)
4689 {
4690 MonoGenericInst *i1 = g1->context.class_inst;
4691 MonoGenericInst *i2 = c2->generic_container->context.class_inst;
4692
4693 if (!mono_metadata_class_equal (g1->container_class, c2, signature_only))
4694 return FALSE;
4695 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
4696 return FALSE;
4697 return !g1->is_tb_open;
4698 }
4699
4700 guint
4701 mono_metadata_generic_context_hash (const MonoGenericContext *context)
4702 {
4703 /* FIXME: check if this seed is good enough */
4704 guint hash = 0xc01dfee7;
4705 if (context->class_inst)
4706 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->class_inst);
4707 if (context->method_inst)
4708 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->method_inst);
4709 return hash;
4710 }
4711
4712 gboolean
4713 mono_metadata_generic_context_equal (const MonoGenericContext *g1, const MonoGenericContext *g2)
4714 {
4715 return g1->class_inst == g2->class_inst && g1->method_inst == g2->method_inst;
4716 }
4717
4718 /*
4719 * mono_metadata_str_hash:
4720 *
4721 * This should be used instead of g_str_hash for computing hash codes visible
4722 * outside this module, since g_str_hash () is not guaranteed to be stable
4723 * (its not the same in eglib for example).
4724 */
4725 guint
4726 mono_metadata_str_hash (gconstpointer v1)
4727 {
4728 /* Same as g_str_hash () in glib */
4729 char *p = (char *) v1;
4730 guint hash = *p;
4731
4732 while (*p++) {
4733 if (*p)
4734 hash = (hash << 5) - hash + *p;
4735 }
4736
4737 return hash;
4738 }
4739
4740 /*
4741 * mono_metadata_type_hash:
4742 * @t1: a type
4743 *
4744 * Computes an hash value for @t1 to be used in GHashTable.
4745 * The returned hash is guaranteed to be the same across executions.
4746 */
4747 guint
4748 mono_metadata_type_hash (MonoType *t1)
4749 {
4750 guint hash = t1->type;
4751
4752 hash |= t1->byref << 6; /* do not collide with t1->type values */
4753 switch (t1->type) {
4754 case MONO_TYPE_VALUETYPE:
4755 case MONO_TYPE_CLASS:
4756 case MONO_TYPE_SZARRAY: {
4757 MonoClass *class = t1->data.klass;
4758 /*
4759 * Dynamic classes must not be hashed on their type since it can change
4760 * during runtime. For example, if we hash a reference type that is
4761 * later made into a valuetype.
4762 *
4763 * This is specially problematic with generic instances since they are
4764 * inserted in a bunch of hash tables before been finished.
4765 */
4766 if (image_is_dynamic (class->image))
4767 return (t1->byref << 6) | mono_metadata_str_hash (class->name);
4768 return ((hash << 5) - hash) ^ mono_metadata_str_hash (class->name);
4769 }
4770 case MONO_TYPE_PTR:
4771 return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
4772 case MONO_TYPE_ARRAY:
4773 return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
4774 case MONO_TYPE_GENERICINST:
4775 return ((hash << 5) - hash) ^ mono_generic_class_hash (t1->data.generic_class);
4776 case MONO_TYPE_VAR:
4777 case MONO_TYPE_MVAR:
4778 return ((hash << 5) - hash) ^ mono_metadata_generic_param_hash (t1->data.generic_param);
4779 default:
4780 return hash;
4781 }
4782 }
4783
4784 guint
4785 mono_metadata_generic_param_hash (MonoGenericParam *p)
4786 {
4787 guint hash;
4788 MonoGenericParamInfo *info;
4789
4790 hash = (mono_generic_param_num (p) << 2);
4791 if (p->gshared_constraint)
4792 hash = ((hash << 5) - hash) ^ mono_metadata_type_hash (p->gshared_constraint);
4793 info = mono_generic_param_info (p);
4794 /* Can't hash on the owner klass/method, since those might not be set when this is called */
4795 if (info)
4796 hash = ((hash << 5) - hash) ^ info->token;
4797 return hash;
4798 }
4799
4800 static gboolean
4801 mono_metadata_generic_param_equal_internal (MonoGenericParam *p1, MonoGenericParam *p2, gboolean signature_only)
4802 {
4803 if (p1 == p2)
4804 return TRUE;
4805 if (mono_generic_param_num (p1) != mono_generic_param_num (p2))
4806 return FALSE;
4807 if (p1->gshared_constraint && p2->gshared_constraint) {
4808 if (!mono_metadata_type_equal (p1->gshared_constraint, p2->gshared_constraint))
4809 return FALSE;
4810 } else {
4811 if (p1->gshared_constraint != p2->gshared_constraint)
4812 return FALSE;
4813 }
4814
4815 /*
4816 * We have to compare the image as well because if we didn't,
4817 * the generic_inst_cache lookup wouldn't care about the image
4818 * of generic params, so what could happen is that a generic
4819 * inst with params from image A is put into the cache, then
4820 * image B gets that generic inst from the cache, image A is
4821 * unloaded, so the inst is deleted, but image B still retains
4822 * a pointer to it.
4823 *
4824 * The AOT runtime doesn't set the image when it's decoding
4825 * types, so we only compare it when the owner is NULL.
4826 */
4827 if (mono_generic_param_owner (p1) == mono_generic_param_owner (p2) &&
4828 (mono_generic_param_owner (p1) || p1->image == p2->image))
4829 return TRUE;
4830
4831 /*
4832 * If `signature_only' is true, we're comparing two (method) signatures.
4833 * In this case, the owner of two type parameters doesn't need to match.
4834 */
4835
4836 return signature_only;
4837 }
4838
4839 gboolean
4840 mono_metadata_generic_param_equal (MonoGenericParam *p1, MonoGenericParam *p2)
4841 {
4842 return mono_metadata_generic_param_equal_internal (p1, p2, TRUE);
4843 }
4844
4845 static gboolean
4846 mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only)
4847 {
4848 if (c1 == c2)
4849 return TRUE;
4850 if (c1->generic_class && c2->generic_class)
4851 return _mono_metadata_generic_class_equal (c1->generic_class, c2->generic_class, signature_only);
4852 if (c1->generic_class && c2->generic_container)
4853 return _mono_metadata_generic_class_container_equal (c1->generic_class, c2, signature_only);
4854 if (c1->generic_container && c2->generic_class)
4855 return _mono_metadata_generic_class_container_equal (c2->generic_class, c1, signature_only);
4856 if ((c1->byval_arg.type == MONO_TYPE_VAR) && (c2->byval_arg.type == MONO_TYPE_VAR))
4857 return mono_metadata_generic_param_equal_internal (
4858 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4859 if ((c1->byval_arg.type == MONO_TYPE_MVAR) && (c2->byval_arg.type == MONO_TYPE_MVAR))
4860 return mono_metadata_generic_param_equal_internal (
4861 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4862 if (signature_only &&
4863 (c1->byval_arg.type == MONO_TYPE_SZARRAY) && (c2->byval_arg.type == MONO_TYPE_SZARRAY))
4864 return mono_metadata_class_equal (c1->byval_arg.data.klass, c2->byval_arg.data.klass, signature_only);
4865 if (signature_only &&
4866 (c1->byval_arg.type == MONO_TYPE_ARRAY) && (c2->byval_arg.type == MONO_TYPE_ARRAY))
4867 return do_mono_metadata_type_equal (&c1->byval_arg, &c2->byval_arg, signature_only);
4868 return FALSE;
4869 }
4870
4871 static gboolean
4872 mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only)
4873 {
4874 gpointer iter1 = 0, iter2 = 0;
4875
4876 if (s1 == s2)
4877 return TRUE;
4878 if (s1->call_convention != s2->call_convention)
4879 return FALSE;
4880 if (s1->sentinelpos != s2->sentinelpos)
4881 return FALSE;
4882 if (s1->hasthis != s2->hasthis)
4883 return FALSE;
4884 if (s1->explicit_this != s2->explicit_this)
4885 return FALSE;
4886 if (! do_mono_metadata_type_equal (s1->ret, s2->ret, signature_only))
4887 return FALSE;
4888 if (s1->param_count != s2->param_count)
4889 return FALSE;
4890
4891 while (TRUE) {
4892 MonoType *t1 = mono_signature_get_params (s1, &iter1);
4893 MonoType *t2 = mono_signature_get_params (s2, &iter2);
4894
4895 if (t1 == NULL || t2 == NULL)
4896 return (t1 == t2);
4897 if (! do_mono_metadata_type_equal (t1, t2, signature_only))
4898 return FALSE;
4899 }
4900 }
4901
4902 /*
4903 * mono_metadata_type_equal:
4904 * @t1: a type
4905 * @t2: another type
4906 *
4907 * Determine if @t1 and @t2 represent the same type.
4908 * Returns: #TRUE if @t1 and @t2 are equal.
4909 */
4910 static gboolean
4911 do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only)
4912 {
4913 if (t1->type != t2->type || t1->byref != t2->byref)
4914 return FALSE;
4915
4916 switch (t1->type) {
4917 case MONO_TYPE_VOID:
4918 case MONO_TYPE_BOOLEAN:
4919 case MONO_TYPE_CHAR:
4920 case MONO_TYPE_I1:
4921 case MONO_TYPE_U1:
4922 case MONO_TYPE_I2:
4923 case MONO_TYPE_U2:
4924 case MONO_TYPE_I4:
4925 case MONO_TYPE_U4:
4926 case MONO_TYPE_I8:
4927 case MONO_TYPE_U8:
4928 case MONO_TYPE_R4:
4929 case MONO_TYPE_R8:
4930 case MONO_TYPE_STRING:
4931 case MONO_TYPE_I:
4932 case MONO_TYPE_U:
4933 case MONO_TYPE_OBJECT:
4934 case MONO_TYPE_TYPEDBYREF:
4935 return TRUE;
4936 case MONO_TYPE_VALUETYPE:
4937 case MONO_TYPE_CLASS:
4938 case MONO_TYPE_SZARRAY:
4939 return mono_metadata_class_equal (t1->data.klass, t2->data.klass, signature_only);
4940 case MONO_TYPE_PTR:
4941 return do_mono_metadata_type_equal (t1->data.type, t2->data.type, signature_only);
4942 case MONO_TYPE_ARRAY:
4943 if (t1->data.array->rank != t2->data.array->rank)
4944 return FALSE;
4945 return mono_metadata_class_equal (t1->data.array->eklass, t2->data.array->eklass, signature_only);
4946 case MONO_TYPE_GENERICINST:
4947 return _mono_metadata_generic_class_equal (
4948 t1->data.generic_class, t2->data.generic_class, signature_only);
4949 case MONO_TYPE_VAR:
4950 return mono_metadata_generic_param_equal_internal (
4951 t1->data.generic_param, t2->data.generic_param, signature_only);
4952 case MONO_TYPE_MVAR:
4953 return mono_metadata_generic_param_equal_internal (
4954 t1->data.generic_param, t2->data.generic_param, signature_only);
4955 case MONO_TYPE_FNPTR:
4956 return mono_metadata_fnptr_equal (t1->data.method, t2->data.method, signature_only);
4957 default:
4958 g_error ("implement type compare for %0x!", t1->type);
4959 return FALSE;
4960 }
4961
4962 return FALSE;
4963 }
4964
4965 gboolean
4966 mono_metadata_type_equal (MonoType *t1, MonoType *t2)
4967 {
4968 return do_mono_metadata_type_equal (t1, t2, FALSE);
4969 }
4970
4971 /**
4972 * mono_metadata_type_equal_full:
4973 * @t1: a type
4974 * @t2: another type
4975 * @signature_only: if signature only comparison should be made
4976 *
4977 * Determine if @t1 and @t2 are signature compatible if @signature_only is #TRUE, otherwise
4978 * behaves the same way as mono_metadata_type_equal.
4979 * The function mono_metadata_type_equal(a, b) is just a shortcut for mono_metadata_type_equal_full(a, b, FALSE).
4980 * Returns: #TRUE if @t1 and @t2 are equal taking @signature_only into account.
4981 */
4982 gboolean
4983 mono_metadata_type_equal_full (MonoType *t1, MonoType *t2, gboolean signature_only)
4984 {
4985 return do_mono_metadata_type_equal (t1, t2, signature_only);
4986 }
4987
4988 /**
4989 * mono_metadata_signature_equal:
4990 * @sig1: a signature
4991 * @sig2: another signature
4992 *
4993 * Determine if @sig1 and @sig2 represent the same signature, with the
4994 * same number of arguments and the same types.
4995 * Returns: #TRUE if @sig1 and @sig2 are equal.
4996 */
4997 gboolean
4998 mono_metadata_signature_equal (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
4999 {
5000 int i;
5001
5002 if (sig1->hasthis != sig2->hasthis || sig1->param_count != sig2->param_count)
5003 return FALSE;
5004
5005 if (sig1->generic_param_count != sig2->generic_param_count)
5006 return FALSE;
5007
5008 /*
5009 * We're just comparing the signatures of two methods here:
5010 *
5011 * If we have two generic methods `void Foo<U> (U u)' and `void Bar<V> (V v)',
5012 * U and V are equal here.
5013 *
5014 * That's what the `signature_only' argument of do_mono_metadata_type_equal() is for.
5015 */
5016
5017 for (i = 0; i < sig1->param_count; i++) {
5018 MonoType *p1 = sig1->params[i];
5019 MonoType *p2 = sig2->params[i];
5020
5021 /* if (p1->attrs != p2->attrs)
5022 return FALSE;
5023 */
5024 if (!do_mono_metadata_type_equal (p1, p2, TRUE))
5025 return FALSE;
5026 }
5027
5028 if (!do_mono_metadata_type_equal (sig1->ret, sig2->ret, TRUE))
5029 return FALSE;
5030 return TRUE;
5031 }
5032
5033 /**
5034 * mono_metadata_type_dup:
5035 * @image: image to alloc memory from
5036 * @original: type to duplicate
5037 *
5038 * Returns: copy of type allocated from the image's mempool (or from the heap, if @image is null).
5039 */
5040 MonoType *
5041 mono_metadata_type_dup (MonoImage *image, const MonoType *o)
5042 {
5043 MonoType *r = NULL;
5044 int sizeof_o = MONO_SIZEOF_TYPE;
5045 if (o->num_mods)
5046 sizeof_o += o->num_mods * sizeof (MonoCustomMod);
5047
5048 r = image ? mono_image_alloc0 (image, sizeof_o) : g_malloc (sizeof_o);
5049
5050 memcpy (r, o, sizeof_o);
5051
5052 if (o->type == MONO_TYPE_PTR) {
5053 r->data.type = mono_metadata_type_dup (image, o->data.type);
5054 } else if (o->type == MONO_TYPE_ARRAY) {
5055 r->data.array = mono_dup_array_type (image, o->data.array);
5056 } else if (o->type == MONO_TYPE_FNPTR) {
5057 /*FIXME the dup'ed signature is leaked mono_metadata_free_type*/
5058 r->data.method = mono_metadata_signature_deep_dup (image, o->data.method);
5059 }
5060 return r;
5061 }
5062
5063 guint
5064 mono_signature_hash (MonoMethodSignature *sig)
5065 {
5066 guint i, res = sig->ret->type;
5067
5068 for (i = 0; i < sig->param_count; i++)
5069 res = (res << 5) - res + mono_type_hash (sig->params[i]);
5070
5071 return res;
5072 }
5073
5074 /*
5075 * mono_metadata_encode_value:
5076 * @value: value to encode
5077 * @buf: buffer where to write the compressed representation
5078 * @endbuf: pointer updated to point at the end of the encoded output
5079 *
5080 * Encodes the value @value in the compressed representation used
5081 * in metadata and stores the result in @buf. @buf needs to be big
5082 * enough to hold the data (4 bytes).
5083 */
5084 void
5085 mono_metadata_encode_value (guint32 value, char *buf, char **endbuf)
5086 {
5087 char *p = buf;
5088
5089 if (value < 0x80)
5090 *p++ = value;
5091 else if (value < 0x4000) {
5092 p [0] = 0x80 | (value >> 8);
5093 p [1] = value & 0xff;
5094 p += 2;
5095 } else {
5096 p [0] = (value >> 24) | 0xc0;
5097 p [1] = (value >> 16) & 0xff;
5098 p [2] = (value >> 8) & 0xff;
5099 p [3] = value & 0xff;
5100 p += 4;
5101 }
5102 if (endbuf)
5103 *endbuf = p;
5104 }
5105
5106 /*
5107 * mono_metadata_field_info:
5108 * @meta: the Image the field is defined in
5109 * @index: the index in the field table representing the field
5110 * @offset: a pointer to an integer where to store the offset that
5111 * may have been specified for the field in a FieldLayout table
5112 * @rva: a pointer to the RVA of the field data in the image that
5113 * may have been defined in a FieldRVA table
5114 * @marshal_spec: a pointer to the marshal spec that may have been
5115 * defined for the field in a FieldMarshal table.
5116 *
5117 * Gather info for field @index that may have been defined in the FieldLayout,
5118 * FieldRVA and FieldMarshal tables.
5119 * Either of offset, rva and marshal_spec can be NULL if you're not interested
5120 * in the data.
5121 */
5122 void
5123 mono_metadata_field_info (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
5124 MonoMarshalSpec **marshal_spec)
5125 {
5126 mono_metadata_field_info_full (meta, index, offset, rva, marshal_spec, FALSE);
5127 }
5128
5129 void
5130 mono_metadata_field_info_with_mempool (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
5131 MonoMarshalSpec **marshal_spec)
5132 {
5133 mono_metadata_field_info_full (meta, index, offset, rva, marshal_spec, TRUE);
5134 }
5135
5136 static void
5137 mono_metadata_field_info_full (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
5138 MonoMarshalSpec **marshal_spec, gboolean alloc_from_image)
5139 {
5140 MonoTableInfo *tdef;
5141 locator_t loc;
5142
5143 loc.idx = index + 1;
5144 if (meta->uncompressed_metadata)
5145 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
5146
5147 if (offset) {
5148 tdef = &meta->tables [MONO_TABLE_FIELDLAYOUT];
5149
5150 loc.col_idx = MONO_FIELD_LAYOUT_FIELD;
5151 loc.t = tdef;
5152
5153 if (tdef->base && mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
5154 *offset = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_LAYOUT_OFFSET);
5155 } else {
5156 *offset = (guint32)-1;
5157 }
5158 }
5159 if (rva) {
5160 tdef = &meta->tables [MONO_TABLE_FIELDRVA];
5161
5162 loc.col_idx = MONO_FIELD_RVA_FIELD;
5163 loc.t = tdef;
5164
5165 if (tdef->base && mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
5166 /*
5167 * LAMESPEC: There is no signature, no nothing, just the raw data.
5168 */
5169 *rva = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_RVA_RVA);
5170 } else {
5171 *rva = 0;
5172 }
5173 }
5174 if (marshal_spec) {
5175 const char *p;
5176
5177 if ((p = mono_metadata_get_marshal_info (meta, index, TRUE))) {
5178 *marshal_spec = mono_metadata_parse_marshal_spec_full (alloc_from_image ? meta : NULL, meta, p);
5179 }
5180 }
5181
5182 }
5183
5184 /*
5185 * mono_metadata_get_constant_index:
5186 * @meta: the Image the field is defined in
5187 * @index: the token that may have a row defined in the constants table
5188 * @hint: possible position for the row
5189 *
5190 * @token must be a FieldDef, ParamDef or PropertyDef token.
5191 *
5192 * Returns: the index into the Constants table or 0 if not found.
5193 */
5194 guint32
5195 mono_metadata_get_constant_index (MonoImage *meta, guint32 token, guint32 hint)
5196 {
5197 MonoTableInfo *tdef;
5198 locator_t loc;
5199 guint32 index = mono_metadata_token_index (token);
5200
5201 tdef = &meta->tables [MONO_TABLE_CONSTANT];
5202 index <<= MONO_HASCONSTANT_BITS;
5203 switch (mono_metadata_token_table (token)) {
5204 case MONO_TABLE_FIELD:
5205 index |= MONO_HASCONSTANT_FIEDDEF;
5206 break;
5207 case MONO_TABLE_PARAM:
5208 index |= MONO_HASCONSTANT_PARAM;
5209 break;
5210 case MONO_TABLE_PROPERTY:
5211 index |= MONO_HASCONSTANT_PROPERTY;
5212 break;
5213 default:
5214 g_warning ("Not a valid token for the constant table: 0x%08x", token);
5215 return 0;
5216 }
5217 loc.idx = index;
5218 loc.col_idx = MONO_CONSTANT_PARENT;
5219 loc.t = tdef;
5220
5221 /* FIXME: Index translation */
5222
5223 if ((hint > 0) && (hint < tdef->rows) && (mono_metadata_decode_row_col (tdef, hint - 1, MONO_CONSTANT_PARENT) == index))
5224 return hint;
5225
5226 if (tdef->base && mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
5227 return loc.result + 1;
5228 }
5229 return 0;
5230 }
5231
5232 /*
5233 * mono_metadata_events_from_typedef:
5234 * @meta: metadata context
5235 * @index: 0-based index (in the TypeDef table) describing a type
5236 *
5237 * Returns: the 0-based index in the Event table for the events in the
5238 * type. The last event that belongs to the type (plus 1) is stored
5239 * in the @end_idx pointer.
5240 */
5241 guint32
5242 mono_metadata_events_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
5243 {
5244 locator_t loc;
5245 guint32 start, end;
5246 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_EVENTMAP];
5247
5248 *end_idx = 0;
5249
5250 if (!tdef->base)
5251 return 0;
5252
5253 loc.t = tdef;
5254 loc.col_idx = MONO_EVENT_MAP_PARENT;
5255 loc.idx = index + 1;
5256
5257 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5258 return 0;
5259
5260 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_EVENT_MAP_EVENTLIST);
5261 if (loc.result + 1 < tdef->rows) {
5262 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_EVENT_MAP_EVENTLIST) - 1;
5263 } else {
5264 end = meta->tables [MONO_TABLE_EVENT].rows;
5265 }
5266
5267 *end_idx = end;
5268 return start - 1;
5269 }
5270
5271 /*
5272 * mono_metadata_methods_from_event:
5273 * @meta: metadata context
5274 * @index: 0-based index (in the Event table) describing a event
5275 *
5276 * Returns: the 0-based index in the MethodDef table for the methods in the
5277 * event. The last method that belongs to the event (plus 1) is stored
5278 * in the @end_idx pointer.
5279 */
5280 guint32
5281 mono_metadata_methods_from_event (MonoImage *meta, guint32 index, guint *end_idx)
5282 {
5283 locator_t loc;
5284 guint start, end;
5285 guint32 cols [MONO_METHOD_SEMA_SIZE];
5286 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
5287
5288 *end_idx = 0;
5289 if (!msemt->base)
5290 return 0;
5291
5292 if (meta->uncompressed_metadata)
5293 index = search_ptr_table (meta, MONO_TABLE_EVENT_POINTER, index + 1) - 1;
5294
5295 loc.t = msemt;
5296 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
5297 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_EVENT; /* Method association coded index */
5298
5299 if (!mono_binary_search (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
5300 return 0;
5301
5302 start = loc.result;
5303 /*
5304 * We may end up in the middle of the rows...
5305 */
5306 while (start > 0) {
5307 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
5308 start--;
5309 else
5310 break;
5311 }
5312 end = start + 1;
5313 while (end < msemt->rows) {
5314 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
5315 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
5316 break;
5317 ++end;
5318 }
5319 *end_idx = end;
5320 return start;
5321 }
5322
5323 /*
5324 * mono_metadata_properties_from_typedef:
5325 * @meta: metadata context
5326 * @index: 0-based index (in the TypeDef table) describing a type
5327 *
5328 * Returns: the 0-based index in the Property table for the properties in the
5329 * type. The last property that belongs to the type (plus 1) is stored
5330 * in the @end_idx pointer.
5331 */
5332 guint32
5333 mono_metadata_properties_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
5334 {
5335 locator_t loc;
5336 guint32 start, end;
5337 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_PROPERTYMAP];
5338
5339 *end_idx = 0;
5340
5341 if (!tdef->base)
5342 return 0;
5343
5344 loc.t = tdef;
5345 loc.col_idx = MONO_PROPERTY_MAP_PARENT;
5346 loc.idx = index + 1;
5347
5348 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5349 return 0;
5350
5351 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_PROPERTY_MAP_PROPERTY_LIST);
5352 if (loc.result + 1 < tdef->rows) {
5353 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_PROPERTY_MAP_PROPERTY_LIST) - 1;
5354 } else {
5355 end = meta->tables [MONO_TABLE_PROPERTY].rows;
5356 }
5357
5358 *end_idx = end;
5359 return start - 1;
5360 }
5361
5362 /*
5363 * mono_metadata_methods_from_property:
5364 * @meta: metadata context
5365 * @index: 0-based index (in the PropertyDef table) describing a property
5366 *
5367 * Returns: the 0-based index in the MethodDef table for the methods in the
5368 * property. The last method that belongs to the property (plus 1) is stored
5369 * in the @end_idx pointer.
5370 */
5371 guint32
5372 mono_metadata_methods_from_property (MonoImage *meta, guint32 index, guint *end_idx)
5373 {
5374 locator_t loc;
5375 guint start, end;
5376 guint32 cols [MONO_METHOD_SEMA_SIZE];
5377 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
5378
5379 *end_idx = 0;
5380 if (!msemt->base)
5381 return 0;
5382
5383 if (meta->uncompressed_metadata)
5384 index = search_ptr_table (meta, MONO_TABLE_PROPERTY_POINTER, index + 1) - 1;
5385
5386 loc.t = msemt;
5387 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
5388 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_PROPERTY; /* Method association coded index */
5389
5390 if (!mono_binary_search (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
5391 return 0;
5392
5393 start = loc.result;
5394 /*
5395 * We may end up in the middle of the rows...
5396 */
5397 while (start > 0) {
5398 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
5399 start--;
5400 else
5401 break;
5402 }
5403 end = start + 1;
5404 while (end < msemt->rows) {
5405 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
5406 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
5407 break;
5408 ++end;
5409 }
5410 *end_idx = end;
5411 return start;
5412 }
5413
5414 guint32
5415 mono_metadata_implmap_from_method (MonoImage *meta, guint32 method_idx)
5416 {
5417 locator_t loc;
5418 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_IMPLMAP];
5419
5420 if (!tdef->base)
5421 return 0;
5422
5423 /* No index translation seems to be needed */
5424
5425 loc.t = tdef;
5426 loc.col_idx = MONO_IMPLMAP_MEMBER;
5427 loc.idx = ((method_idx + 1) << MONO_MEMBERFORWD_BITS) | MONO_MEMBERFORWD_METHODDEF;
5428
5429 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5430 return 0;
5431
5432 return loc.result + 1;
5433 }
5434
5435 /**
5436 * @image: context where the image is created
5437 * @type_spec: typespec token
5438 * @deprecated use mono_type_create_from_typespec_checked that has proper error handling
5439 *
5440 * Creates a MonoType representing the TypeSpec indexed by the @type_spec
5441 * token.
5442 */
5443 MonoType *
5444 mono_type_create_from_typespec (MonoImage *image, guint32 type_spec)
5445 {
5446 MonoError error;
5447 MonoType *type = mono_type_create_from_typespec_checked (image, type_spec, &error);
5448 if (!type)
5449 g_error ("Could not create typespec %x due to %s", type_spec, mono_error_get_message (&error));
5450 return type;
5451 }
5452
5453 MonoType *
5454 mono_type_create_from_typespec_checked (MonoImage *image, guint32 type_spec, MonoError *error)
5455
5456 {
5457 guint32 idx = mono_metadata_token_index (type_spec);
5458 MonoTableInfo *t;
5459 guint32 cols [MONO_TYPESPEC_SIZE];
5460 const char *ptr;
5461 MonoType *type, *type2;
5462
5463 mono_error_init (error);
5464
5465 mono_image_lock (image);
5466 type = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
5467 mono_image_unlock (image);
5468 if (type)
5469 return type;
5470
5471 t = &image->tables [MONO_TABLE_TYPESPEC];
5472
5473 mono_metadata_decode_row (t, idx-1, cols, MONO_TYPESPEC_SIZE);
5474 ptr = mono_metadata_blob_heap (image, cols [MONO_TYPESPEC_SIGNATURE]);
5475
5476 if (!mono_verifier_verify_typespec_signature (image, cols [MONO_TYPESPEC_SIGNATURE], type_spec, NULL)) {
5477 mono_error_set_bad_image (error, image, "Could not verify type spec %08x.", type_spec);
5478 return NULL;
5479 }
5480
5481 mono_metadata_decode_value (ptr, &ptr);
5482
5483 type = mono_metadata_parse_type_internal (image, NULL, MONO_PARSE_TYPE, 0, TRUE, ptr, &ptr);
5484 if (!type) {
5485 if (mono_loader_get_last_error ())
5486 mono_error_set_from_loader_error (error);
5487 else
5488 mono_error_set_bad_image (error, image, "Could not parse type spec %08x.", type_spec);
5489 return NULL;
5490 }
5491
5492 type2 = mono_metadata_type_dup (image, type);
5493 mono_metadata_free_type (type);
5494
5495 mono_image_lock (image);
5496 type = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
5497 /* We might leak some data in the image mempool if found */
5498 if (!type) {
5499 g_hash_table_insert (image->typespec_cache, GUINT_TO_POINTER (type_spec), type2);
5500 type = type2;
5501 }
5502 mono_image_unlock (image);
5503
5504 return type;
5505 }
5506
5507
5508 static char*
5509 mono_image_strndup (MonoImage *image, const char *data, guint len)
5510 {
5511 char *res;
5512 if (!image)
5513 return g_strndup (data, len);
5514 res = mono_image_alloc (image, len + 1);
5515 memcpy (res, data, len);
5516 res [len] = 0;
5517 return res;
5518 }
5519
5520 MonoMarshalSpec *
5521 mono_metadata_parse_marshal_spec (MonoImage *image, const char *ptr)
5522 {
5523 return mono_metadata_parse_marshal_spec_full (NULL, image, ptr);
5524 }
5525
5526 /*
5527 * If IMAGE is non-null, memory will be allocated from its mempool, otherwise it will be allocated using malloc.
5528 * PARENT_IMAGE is the image containing the marshal spec.
5529 */
5530 MonoMarshalSpec *
5531 mono_metadata_parse_marshal_spec_full (MonoImage *image, MonoImage *parent_image, const char *ptr)
5532 {
5533 MonoMarshalSpec *res;
5534 int len;
5535 const char *start = ptr;
5536
5537 /* fixme: this is incomplete, but I cant find more infos in the specs */
5538
5539 if (image)
5540 res = mono_image_alloc0 (image, sizeof (MonoMarshalSpec));
5541 else
5542 res = g_new0 (MonoMarshalSpec, 1);
5543
5544 len = mono_metadata_decode_value (ptr, &ptr);
5545 res->native = *ptr++;
5546
5547 if (res->native == MONO_NATIVE_LPARRAY) {
5548 res->data.array_data.param_num = -1;
5549 res->data.array_data.num_elem = -1;
5550 res->data.array_data.elem_mult = -1;
5551
5552 if (ptr - start <= len)
5553 res->data.array_data.elem_type = *ptr++;
5554 if (ptr - start <= len)
5555 res->data.array_data.param_num = mono_metadata_decode_value (ptr, &ptr);
5556 if (ptr - start <= len)
5557 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
5558 if (ptr - start <= len) {
5559 /*
5560 * LAMESPEC: Older spec versions say this parameter comes before
5561 * num_elem. Never spec versions don't talk about elem_mult at
5562 * all, but csc still emits it, and it is used to distinguish
5563 * between param_num being 0, and param_num being omitted.
5564 * So if (param_num == 0) && (num_elem > 0), then
5565 * elem_mult == 0 -> the array size is num_elem
5566 * elem_mult == 1 -> the array size is @param_num + num_elem
5567 */
5568 res->data.array_data.elem_mult = mono_metadata_decode_value (ptr, &ptr);
5569 }
5570 }
5571
5572 if (res->native == MONO_NATIVE_BYVALTSTR) {
5573 if (ptr - start <= len)
5574 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
5575 }
5576
5577 if (res->native == MONO_NATIVE_BYVALARRAY) {
5578 if (ptr - start <= len)
5579 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
5580 }
5581
5582 if (res->native == MONO_NATIVE_CUSTOM) {
5583 /* skip unused type guid */
5584 len = mono_metadata_decode_value (ptr, &ptr);
5585 ptr += len;
5586 /* skip unused native type name */
5587 len = mono_metadata_decode_value (ptr, &ptr);
5588 ptr += len;
5589 /* read custom marshaler type name */
5590 len = mono_metadata_decode_value (ptr, &ptr);
5591 res->data.custom_data.custom_name = mono_image_strndup (image, ptr, len);
5592 ptr += len;
5593 /* read cookie string */
5594 len = mono_metadata_decode_value (ptr, &ptr);
5595 res->data.custom_data.cookie = mono_image_strndup (image, ptr, len);
5596 res->data.custom_data.image = parent_image;
5597 }
5598
5599 if (res->native == MONO_NATIVE_SAFEARRAY) {
5600 res->data.safearray_data.elem_type = 0;
5601 res->data.safearray_data.num_elem = 0;
5602 if (ptr - start <= len)
5603 res->data.safearray_data.elem_type = *ptr++;
5604 if (ptr - start <= len)
5605 res->data.safearray_data.num_elem = *ptr++;
5606 }
5607 return res;
5608 }
5609
5610 void
5611 mono_metadata_free_marshal_spec (MonoMarshalSpec *spec)
5612 {
5613 if (spec->native == MONO_NATIVE_CUSTOM) {
5614 g_free (spec->data.custom_data.custom_name);
5615 g_free (spec->data.custom_data.cookie);
5616 }
5617 g_free (spec);
5618 }
5619
5620 /**
5621 * mono_type_to_unmanaged:
5622 *
5623 * Returns: A MonoMarshalNative enumeration value (MONO_NATIVE_) value
5624 * describing the underlying native reprensetation of the type.
5625 *
5626 * In addition the value pointed by
5627 * "conv" will contain the kind of marshalling required for this
5628 * particular type one of the MONO_MARSHAL_CONV_ enumeration values.
5629 */
5630 guint32
5631 mono_type_to_unmanaged (MonoType *type, MonoMarshalSpec *mspec, gboolean as_field,
5632 gboolean unicode, MonoMarshalConv *conv)
5633 {
5634 MonoMarshalConv dummy_conv;
5635 int t = type->type;
5636
5637 if (!conv)
5638 conv = &dummy_conv;
5639
5640 *conv = MONO_MARSHAL_CONV_NONE;
5641
5642 if (type->byref)
5643 return MONO_NATIVE_UINT;
5644
5645 handle_enum:
5646 switch (t) {
5647 case MONO_TYPE_BOOLEAN:
5648 if (mspec) {
5649 switch (mspec->native) {
5650 case MONO_NATIVE_VARIANTBOOL:
5651 *conv = MONO_MARSHAL_CONV_BOOL_VARIANTBOOL;
5652 return MONO_NATIVE_VARIANTBOOL;
5653 case MONO_NATIVE_BOOLEAN:
5654 *conv = MONO_MARSHAL_CONV_BOOL_I4;
5655 return MONO_NATIVE_BOOLEAN;
5656 case MONO_NATIVE_I1:
5657 case MONO_NATIVE_U1:
5658 return mspec->native;
5659 default:
5660 g_error ("cant marshal bool to native type %02x", mspec->native);
5661 }
5662 }
5663 *conv = MONO_MARSHAL_CONV_BOOL_I4;
5664 return MONO_NATIVE_BOOLEAN;
5665 case MONO_TYPE_CHAR:
5666 if (mspec) {
5667 switch (mspec->native) {
5668 case MONO_NATIVE_U2:
5669 case MONO_NATIVE_U1:
5670 return mspec->native;
5671 default:
5672 g_error ("cant marshal char to native type %02x", mspec->native);
5673 }
5674 }
5675 return unicode ? MONO_NATIVE_U2 : MONO_NATIVE_U1;
5676 case MONO_TYPE_I1: return MONO_NATIVE_I1;
5677 case MONO_TYPE_U1: return MONO_NATIVE_U1;
5678 case MONO_TYPE_I2: return MONO_NATIVE_I2;
5679 case MONO_TYPE_U2: return MONO_NATIVE_U2;
5680 case MONO_TYPE_I4: return MONO_NATIVE_I4;
5681 case MONO_TYPE_U4: return MONO_NATIVE_U4;
5682 case MONO_TYPE_I8: return MONO_NATIVE_I8;
5683 case MONO_TYPE_U8: return MONO_NATIVE_U8;
5684 case MONO_TYPE_R4: return MONO_NATIVE_R4;
5685 case MONO_TYPE_R8: return MONO_NATIVE_R8;
5686 case MONO_TYPE_STRING:
5687 if (mspec) {
5688 switch (mspec->native) {
5689 case MONO_NATIVE_BSTR:
5690 *conv = MONO_MARSHAL_CONV_STR_BSTR;
5691 return MONO_NATIVE_BSTR;
5692 case MONO_NATIVE_LPSTR:
5693 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
5694 return MONO_NATIVE_LPSTR;
5695 case MONO_NATIVE_LPWSTR:
5696 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
5697 return MONO_NATIVE_LPWSTR;
5698 case MONO_NATIVE_LPTSTR:
5699 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
5700 return MONO_NATIVE_LPTSTR;
5701 case MONO_NATIVE_ANSIBSTR:
5702 *conv = MONO_MARSHAL_CONV_STR_ANSIBSTR;
5703 return MONO_NATIVE_ANSIBSTR;
5704 case MONO_NATIVE_TBSTR:
5705 *conv = MONO_MARSHAL_CONV_STR_TBSTR;
5706 return MONO_NATIVE_TBSTR;
5707 case MONO_NATIVE_BYVALTSTR:
5708 if (unicode)
5709 *conv = MONO_MARSHAL_CONV_STR_BYVALWSTR;
5710 else
5711 *conv = MONO_MARSHAL_CONV_STR_BYVALSTR;
5712 return MONO_NATIVE_BYVALTSTR;
5713 default:
5714 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);
5715 }
5716 }
5717 if (unicode) {
5718 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
5719 return MONO_NATIVE_LPWSTR;
5720 }
5721 else {
5722 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
5723 return MONO_NATIVE_LPSTR;
5724 }
5725 case MONO_TYPE_PTR: return MONO_NATIVE_UINT;
5726 case MONO_TYPE_VALUETYPE: /*FIXME*/
5727 if (type->data.klass->enumtype) {
5728 t = mono_class_enum_basetype (type->data.klass)->type;
5729 goto handle_enum;
5730 }
5731 if (type->data.klass == mono_defaults.handleref_class){
5732 *conv = MONO_MARSHAL_CONV_HANDLEREF;
5733 return MONO_NATIVE_INT;
5734 }
5735 return MONO_NATIVE_STRUCT;
5736 case MONO_TYPE_SZARRAY:
5737 case MONO_TYPE_ARRAY:
5738 if (mspec) {
5739 switch (mspec->native) {
5740 case MONO_NATIVE_BYVALARRAY:
5741 if ((type->data.klass->element_class == mono_defaults.char_class) && !unicode)
5742 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALCHARARRAY;
5743 else
5744 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALARRAY;
5745 return MONO_NATIVE_BYVALARRAY;
5746 case MONO_NATIVE_SAFEARRAY:
5747 *conv = MONO_MARSHAL_CONV_ARRAY_SAVEARRAY;
5748 return MONO_NATIVE_SAFEARRAY;
5749 case MONO_NATIVE_LPARRAY:
5750 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
5751 return MONO_NATIVE_LPARRAY;
5752 default:
5753 g_error ("cant marshal array as native type %02x", mspec->native);
5754 }
5755 }
5756
5757 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
5758 return MONO_NATIVE_LPARRAY;
5759 case MONO_TYPE_I: return MONO_NATIVE_INT;
5760 case MONO_TYPE_U: return MONO_NATIVE_UINT;
5761 case MONO_TYPE_CLASS:
5762 case MONO_TYPE_OBJECT: {
5763 /* FIXME : we need to handle ArrayList and StringBuilder here, probably */
5764 if (mspec) {
5765 switch (mspec->native) {
5766 case MONO_NATIVE_STRUCT:
5767 return MONO_NATIVE_STRUCT;
5768 case MONO_NATIVE_CUSTOM:
5769 return MONO_NATIVE_CUSTOM;
5770 case MONO_NATIVE_INTERFACE:
5771 *conv = MONO_MARSHAL_CONV_OBJECT_INTERFACE;
5772 return MONO_NATIVE_INTERFACE;
5773 case MONO_NATIVE_IDISPATCH:
5774 *conv = MONO_MARSHAL_CONV_OBJECT_IDISPATCH;
5775 return MONO_NATIVE_IDISPATCH;
5776 case MONO_NATIVE_IUNKNOWN:
5777 *conv = MONO_MARSHAL_CONV_OBJECT_IUNKNOWN;
5778 return MONO_NATIVE_IUNKNOWN;
5779 case MONO_NATIVE_FUNC:
5780 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
5781 type->data.klass == mono_defaults.delegate_class ||
5782 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
5783 *conv = MONO_MARSHAL_CONV_DEL_FTN;
5784 return MONO_NATIVE_FUNC;
5785 }
5786 /* Fall through */
5787 default:
5788 g_error ("cant marshal object as native type %02x", mspec->native);
5789 }
5790 }
5791 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
5792 type->data.klass == mono_defaults.delegate_class ||
5793 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
5794 *conv = MONO_MARSHAL_CONV_DEL_FTN;
5795 return MONO_NATIVE_FUNC;
5796 }
5797 if (mono_defaults.safehandle_class && type->data.klass == mono_defaults.safehandle_class){
5798 *conv = MONO_MARSHAL_CONV_SAFEHANDLE;
5799 return MONO_NATIVE_INT;
5800 }
5801 *conv = MONO_MARSHAL_CONV_OBJECT_STRUCT;
5802 return MONO_NATIVE_STRUCT;
5803 }
5804 case MONO_TYPE_FNPTR: return MONO_NATIVE_FUNC;
5805 case MONO_TYPE_GENERICINST:
5806 type = &type->data.generic_class->container_class->byval_arg;
5807 t = type->type;
5808 goto handle_enum;
5809 case MONO_TYPE_TYPEDBYREF:
5810 default:
5811 g_error ("type 0x%02x not handled in marshal", t);
5812 }
5813 return MONO_NATIVE_MAX;
5814 }
5815
5816 const char*
5817 mono_metadata_get_marshal_info (MonoImage *meta, guint32 idx, gboolean is_field)
5818 {
5819 locator_t loc;
5820 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_FIELDMARSHAL];
5821
5822 if (!tdef->base)
5823 return NULL;
5824
5825 loc.t = tdef;
5826 loc.col_idx = MONO_FIELD_MARSHAL_PARENT;
5827 loc.idx = ((idx + 1) << MONO_HAS_FIELD_MARSHAL_BITS) | (is_field? MONO_HAS_FIELD_MARSHAL_FIELDSREF: MONO_HAS_FIELD_MARSHAL_PARAMDEF);
5828
5829 /* FIXME: Index translation */
5830
5831 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5832 return NULL;
5833
5834 return mono_metadata_blob_heap (meta, mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_MARSHAL_NATIVE_TYPE));
5835 }
5836
5837 MonoMethod*
5838 method_from_method_def_or_ref (MonoImage *m, guint32 tok, MonoGenericContext *context, MonoError *error)
5839 {
5840 MonoMethod *result = NULL;
5841 guint32 idx = tok >> MONO_METHODDEFORREF_BITS;
5842
5843 mono_error_init (error);
5844
5845 switch (tok & MONO_METHODDEFORREF_MASK) {
5846 case MONO_METHODDEFORREF_METHODDEF:
5847 result = mono_get_method_checked (m, MONO_TOKEN_METHOD_DEF | idx, NULL, context, error);
5848 break;
5849 case MONO_METHODDEFORREF_METHODREF:
5850 result = mono_get_method_checked (m, MONO_TOKEN_MEMBER_REF | idx, NULL, context, error);
5851 break;
5852 default:
5853 mono_error_set_bad_image (error, m, "Invalid MethodDefOfRef token %x", tok);
5854 }
5855
5856 return result;
5857 }
5858
5859 /*
5860 * mono_class_get_overrides_full:
5861 *
5862 * Return the method overrides belonging to class @type_token in @overrides, and
5863 * the number of overrides in @num_overrides.
5864 *
5865 * Returns: TRUE on success, FALSE on failure.
5866 */
5867 gboolean
5868 mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod ***overrides, gint32 *num_overrides,
5869 MonoGenericContext *generic_context)
5870 {
5871 MonoError error;
5872 locator_t loc;
5873 MonoTableInfo *tdef = &image->tables [MONO_TABLE_METHODIMPL];
5874 guint32 start, end;
5875 gint32 i, num;
5876 guint32 cols [MONO_METHODIMPL_SIZE];
5877 MonoMethod **result;
5878 gint32 ok = TRUE;
5879
5880 *overrides = NULL;
5881 if (num_overrides)
5882 *num_overrides = 0;
5883
5884 if (!tdef->base)
5885 return TRUE;
5886
5887 loc.t = tdef;
5888 loc.col_idx = MONO_METHODIMPL_CLASS;
5889 loc.idx = mono_metadata_token_index (type_token);
5890
5891 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5892 return TRUE;
5893
5894 start = loc.result;
5895 end = start + 1;
5896 /*
5897 * We may end up in the middle of the rows...
5898 */
5899 while (start > 0) {
5900 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_METHODIMPL_CLASS))
5901 start--;
5902 else
5903 break;
5904 }
5905 while (end < tdef->rows) {
5906 if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
5907 end++;
5908 else
5909 break;
5910 }
5911 num = end - start;
5912 result = g_new (MonoMethod*, num * 2);
5913 for (i = 0; i < num; ++i) {
5914 MonoMethod *method;
5915
5916 if (!mono_verifier_verify_methodimpl_row (image, start + i, &error)) {
5917 mono_error_cleanup (&error); /* FIXME don't swallow the error */
5918 ok = FALSE;
5919 break;
5920 }
5921
5922 mono_metadata_decode_row (tdef, start + i, cols, MONO_METHODIMPL_SIZE);
5923 method = method_from_method_def_or_ref (
5924 image, cols [MONO_METHODIMPL_DECLARATION], generic_context, &error);
5925 if (method == NULL) {
5926 mono_error_cleanup (&error); /* FIXME don't swallow the error */
5927 ok = FALSE;
5928 }
5929 result [i * 2] = method;
5930 method = method_from_method_def_or_ref (
5931 image, cols [MONO_METHODIMPL_BODY], generic_context, &error);
5932 if (method == NULL) {
5933 mono_error_cleanup (&error); /* FIXME don't swallow the error */
5934 ok = FALSE;
5935 }
5936 result [i * 2 + 1] = method;
5937 }
5938
5939 *overrides = result;
5940 if (num_overrides)
5941 *num_overrides = num;
5942 return ok;
5943 }
5944
5945 /**
5946 * mono_guid_to_string:
5947 *
5948 * Converts a 16 byte Microsoft GUID to the standard string representation.
5949 */
5950 char *
5951 mono_guid_to_string (const guint8 *guid)
5952 {
5953 return g_strdup_printf ("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
5954 guid[3], guid[2], guid[1], guid[0],
5955 guid[5], guid[4],
5956 guid[7], guid[6],
5957 guid[8], guid[9],
5958 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
5959 }
5960
5961 static gboolean
5962 get_constraints (MonoImage *image, int owner, MonoClass ***constraints, MonoGenericContainer *container, MonoError *error)
5963 {
5964 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAMCONSTRAINT];
5965 guint32 cols [MONO_GENPARCONSTRAINT_SIZE];
5966 guint32 i, token, found;
5967 MonoClass *klass, **res;
5968 GSList *cons = NULL, *tmp;
5969 MonoGenericContext *context = &container->context;
5970
5971 mono_error_init (error);
5972
5973 *constraints = NULL;
5974 found = 0;
5975 for (i = 0; i < tdef->rows; ++i) {
5976 mono_metadata_decode_row (tdef, i, cols, MONO_GENPARCONSTRAINT_SIZE);
5977 if (cols [MONO_GENPARCONSTRAINT_GENERICPAR] == owner) {
5978 token = mono_metadata_token_from_dor (cols [MONO_GENPARCONSTRAINT_CONSTRAINT]);
5979 klass = mono_class_get_and_inflate_typespec_checked (image, token, context, error);
5980 if (!klass) {
5981 g_slist_free (cons);
5982 return FALSE;
5983 }
5984 cons = g_slist_append (cons, klass);
5985 ++found;
5986 } else {
5987 /* contiguous list finished */
5988 if (found)
5989 break;
5990 }
5991 }
5992 if (!found)
5993 return TRUE;
5994 res = mono_image_alloc0 (image, sizeof (MonoClass*) * (found + 1));
5995 for (i = 0, tmp = cons; i < found; ++i, tmp = tmp->next) {
5996 res [i] = tmp->data;
5997 }
5998 g_slist_free (cons);
5999 *constraints = res;
6000 return TRUE;
6001 }
6002
6003 /*
6004 * mono_metadata_get_generic_param_row:
6005 *
6006 * @image:
6007 * @token: TypeOrMethodDef token, owner for GenericParam
6008 * @owner: coded token, set on return
6009 *
6010 * Returns: 1-based row-id in the GenericParam table whose
6011 * owner is @token. 0 if not found.
6012 */
6013 guint32
6014 mono_metadata_get_generic_param_row (MonoImage *image, guint32 token, guint32 *owner)
6015 {
6016 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
6017 locator_t loc;
6018
6019 g_assert (owner);
6020 if (!tdef->base)
6021 return 0;
6022
6023 if (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
6024 *owner = MONO_TYPEORMETHOD_TYPE;
6025 else if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
6026 *owner = MONO_TYPEORMETHOD_METHOD;
6027 else {
6028 g_error ("wrong token %x to get_generic_param_row", token);
6029 return 0;
6030 }
6031 *owner |= mono_metadata_token_index (token) << MONO_TYPEORMETHOD_BITS;
6032
6033 loc.idx = *owner;
6034 loc.col_idx = MONO_GENERICPARAM_OWNER;
6035 loc.t = tdef;
6036
6037 if (!mono_binary_search (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
6038 return 0;
6039
6040 /* Find the first entry by searching backwards */
6041 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_GENERICPARAM_OWNER) == loc.idx))
6042 loc.result --;
6043
6044 return loc.result + 1;
6045 }
6046
6047 gboolean
6048 mono_metadata_has_generic_params (MonoImage *image, guint32 token)
6049 {
6050 guint32 owner;
6051 return mono_metadata_get_generic_param_row (image, token, &owner);
6052 }
6053
6054 /*
6055 * Memory is allocated from IMAGE's mempool.
6056 */
6057 gboolean
6058 mono_metadata_load_generic_param_constraints_checked (MonoImage *image, guint32 token,
6059 MonoGenericContainer *container, MonoError *error)
6060 {
6061
6062 guint32 start_row, i, owner;
6063 mono_error_init (error);
6064
6065 if (! (start_row = mono_metadata_get_generic_param_row (image, token, &owner)))
6066 return TRUE;
6067 for (i = 0; i < container->type_argc; i++) {
6068 if (!get_constraints (image, start_row + i, &mono_generic_container_get_param_info (container, i)->constraints, container, error)) {
6069 mono_loader_assert_no_error ();
6070 return FALSE;
6071 }
6072 }
6073 return TRUE;
6074 }
6075
6076 /*
6077 * mono_metadata_load_generic_params:
6078 *
6079 * Load the type parameters from the type or method definition @token.
6080 *
6081 * Use this method after parsing a type or method definition to figure out whether it's a generic
6082 * type / method. When parsing a method definition, @parent_container points to the generic container
6083 * of the current class, if any.
6084 *
6085 * Note: This method does not load the constraints: for typedefs, this has to be done after fully
6086 * creating the type.
6087 *
6088 * Returns: NULL if @token is not a generic type or method definition or the new generic container.
6089 *
6090 * LOCKING: Acquires the loader lock
6091 *
6092 */
6093 MonoGenericContainer *
6094 mono_metadata_load_generic_params (MonoImage *image, guint32 token, MonoGenericContainer *parent_container)
6095 {
6096 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
6097 guint32 cols [MONO_GENERICPARAM_SIZE];
6098 guint32 i, owner = 0, n;
6099 MonoGenericContainer *container;
6100 MonoGenericParamFull *params;
6101 MonoGenericContext *context;
6102
6103 if (!(i = mono_metadata_get_generic_param_row (image, token, &owner)))
6104 return NULL;
6105 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
6106 params = NULL;
6107 n = 0;
6108 container = mono_image_alloc0 (image, sizeof (MonoGenericContainer));
6109 container->image = image;
6110 do {
6111 n++;
6112 params = g_realloc (params, sizeof (MonoGenericParamFull) * n);
6113 memset (&params [n - 1], 0, sizeof (MonoGenericParamFull));
6114 params [n - 1].param.owner = container;
6115 params [n - 1].param.num = cols [MONO_GENERICPARAM_NUMBER];
6116 params [n - 1].info.token = i | MONO_TOKEN_GENERIC_PARAM;
6117 params [n - 1].info.flags = cols [MONO_GENERICPARAM_FLAGS];
6118 params [n - 1].info.name = mono_metadata_string_heap (image, cols [MONO_GENERICPARAM_NAME]);
6119 if (params [n - 1].param.num != n - 1)
6120 g_warning ("GenericParam table unsorted or hole in generic param sequence: token %d", i);
6121 if (++i > tdef->rows)
6122 break;
6123 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
6124 } while (cols [MONO_GENERICPARAM_OWNER] == owner);
6125
6126 container->type_argc = n;
6127 container->type_params = mono_image_alloc0 (image, sizeof (MonoGenericParamFull) * n);
6128 memcpy (container->type_params, params, sizeof (MonoGenericParamFull) * n);
6129 g_free (params);
6130 container->parent = parent_container;
6131
6132 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
6133 container->is_method = 1;
6134
6135 g_assert (container->parent == NULL || container->is_method);
6136
6137 context = &container->context;
6138 if (container->is_method) {
6139 context->class_inst = container->parent ? container->parent->context.class_inst : NULL;
6140 context->method_inst = mono_get_shared_generic_inst (container);
6141 } else {
6142 context->class_inst = mono_get_shared_generic_inst (container);
6143 }
6144
6145 return container;
6146 }
6147
6148 MonoGenericInst *
6149 mono_get_shared_generic_inst (MonoGenericContainer *container)
6150 {
6151 MonoType **type_argv;
6152 MonoType *helper;
6153 MonoGenericInst *nginst;
6154 int i;
6155
6156 type_argv = g_new0 (MonoType *, container->type_argc);
6157 helper = g_new0 (MonoType, container->type_argc);
6158
6159 for (i = 0; i < container->type_argc; i++) {
6160 MonoType *t = &helper [i];
6161
6162 t->type = container->is_method ? MONO_TYPE_MVAR : MONO_TYPE_VAR;
6163 t->data.generic_param = mono_generic_container_get_param (container, i);
6164
6165 type_argv [i] = t;
6166 }
6167
6168 nginst = mono_metadata_get_generic_inst (container->type_argc, type_argv);
6169
6170 g_free (type_argv);
6171 g_free (helper);
6172
6173 return nginst;
6174 }
6175
6176 /**
6177 * mono_type_is_byref:
6178 * @type: the MonoType operated on
6179 *
6180 * Returns: #TRUE if @type represents a type passed by reference,
6181 * #FALSE otherwise.
6182 */
6183 gboolean
6184 mono_type_is_byref (MonoType *type)
6185 {
6186 return type->byref;
6187 }
6188
6189 /**
6190 * mono_type_get_type:
6191 * @type: the MonoType operated on
6192 *
6193 * Returns: the IL type value for @type. This is one of the MonoTypeEnum
6194 * enum members like MONO_TYPE_I4 or MONO_TYPE_STRING.
6195 */
6196 int
6197 mono_type_get_type (MonoType *type)
6198 {
6199 return type->type;
6200 }
6201
6202 /**
6203 * mono_type_get_signature:
6204 * @type: the MonoType operated on
6205 *
6206 * It is only valid to call this function if @type is a MONO_TYPE_FNPTR.
6207 *
6208 * Returns: the MonoMethodSignature pointer that describes the signature
6209 * of the function pointer @type represents.
6210 */
6211 MonoMethodSignature*
6212 mono_type_get_signature (MonoType *type)
6213 {
6214 g_assert (type->type == MONO_TYPE_FNPTR);
6215 return type->data.method;
6216 }
6217
6218 /**
6219 * mono_type_get_class:
6220 * @type: the MonoType operated on
6221 *
6222 * It is only valid to call this function if @type is a MONO_TYPE_CLASS or a
6223 * MONO_TYPE_VALUETYPE. For more general functionality, use mono_class_from_mono_type (),
6224 * instead
6225 *
6226 * Returns: the MonoClass pointer that describes the class that @type represents.
6227 */
6228 MonoClass*
6229 mono_type_get_class (MonoType *type)
6230 {
6231 /* FIXME: review the runtime users before adding the assert here */
6232 return type->data.klass;
6233 }
6234
6235 /**
6236 * mono_type_get_array_type:
6237 * @type: the MonoType operated on
6238 *
6239 * It is only valid to call this function if @type is a MONO_TYPE_ARRAY.
6240 *
6241 * Returns: a MonoArrayType struct describing the array type that @type
6242 * represents. The info includes details such as rank, array element type
6243 * and the sizes and bounds of multidimensional arrays.
6244 */
6245 MonoArrayType*
6246 mono_type_get_array_type (MonoType *type)
6247 {
6248 return type->data.array;
6249 }
6250
6251 /**
6252 * mono_type_get_ptr_type:
6253 * @type: the MonoType operated on
6254 *
6255 * It is only valid to call this function if @type is a MONO_TYPE_PTR.
6256 * instead
6257 *
6258 * Returns: the MonoType pointer that describes the type that @type
6259 * represents a pointer to.
6260 */
6261 MonoType*
6262 mono_type_get_ptr_type (MonoType *type)
6263 {
6264 g_assert (type->type == MONO_TYPE_PTR);
6265 return type->data.type;
6266 }
6267
6268 MonoClass*
6269 mono_type_get_modifiers (MonoType *type, gboolean *is_required, gpointer *iter)
6270 {
6271 /* FIXME: implement */
6272 return NULL;
6273 }
6274
6275 /**
6276 * mono_type_is_struct:
6277 * @type: the MonoType operated on
6278 *
6279 * Returns: #TRUE is @type is a struct, that is a ValueType but not en enum
6280 * or a basic type like System.Int32. #FALSE otherwise.
6281 */
6282 mono_bool
6283 mono_type_is_struct (MonoType *type)
6284 {
6285 return (!type->byref && ((type->type == MONO_TYPE_VALUETYPE &&
6286 !type->data.klass->enumtype) || (type->type == MONO_TYPE_TYPEDBYREF) ||
6287 ((type->type == MONO_TYPE_GENERICINST) &&
6288 mono_metadata_generic_class_is_valuetype (type->data.generic_class) &&
6289 !type->data.generic_class->container_class->enumtype)));
6290 }
6291
6292 /**
6293 * mono_type_is_void:
6294 * @type: the MonoType operated on
6295 *
6296 * Returns: #TRUE is @type is System.Void. #FALSE otherwise.
6297 */
6298 mono_bool
6299 mono_type_is_void (MonoType *type)
6300 {
6301 return (type && (type->type == MONO_TYPE_VOID) && !type->byref);
6302 }
6303
6304 /**
6305 * mono_type_is_pointer:
6306 * @type: the MonoType operated on
6307 *
6308 * Returns: #TRUE is @type is a managed or unmanaged pointer type. #FALSE otherwise.
6309 */
6310 mono_bool
6311 mono_type_is_pointer (MonoType *type)
6312 {
6313 return (type && ((type->byref || (type->type == MONO_TYPE_I) || type->type == MONO_TYPE_STRING)
6314 || (type->type == MONO_TYPE_SZARRAY) || (type->type == MONO_TYPE_CLASS) ||
6315 (type->type == MONO_TYPE_U) || (type->type == MONO_TYPE_OBJECT) ||
6316 (type->type == MONO_TYPE_ARRAY) || (type->type == MONO_TYPE_PTR) ||
6317 (type->type == MONO_TYPE_FNPTR)));
6318 }
6319
6320 /**
6321 * mono_type_is_reference:
6322 * @type: the MonoType operated on
6323 *
6324 * Returns: #TRUE is @type represents an object reference . #FALSE otherwise.
6325 */
6326 mono_bool
6327 mono_type_is_reference (MonoType *type)
6328 {
6329 return (type && (((type->type == MONO_TYPE_STRING) ||
6330 (type->type == MONO_TYPE_SZARRAY) || (type->type == MONO_TYPE_CLASS) ||
6331 (type->type == MONO_TYPE_OBJECT) || (type->type == MONO_TYPE_ARRAY)) ||
6332 ((type->type == MONO_TYPE_GENERICINST) &&
6333 !mono_metadata_generic_class_is_valuetype (type->data.generic_class))));
6334 }
6335
6336 /**
6337 * mono_signature_get_return_type:
6338 * @sig: the method signature inspected
6339 *
6340 * Returns: the return type of the method signature @sig
6341 */
6342 MonoType*
6343 mono_signature_get_return_type (MonoMethodSignature *sig)
6344 {
6345 return sig->ret;
6346 }
6347
6348 /**
6349 * mono_signature_get_params:
6350 * @sig: the method signature inspected
6351 * #iter: pointer to an iterator
6352 *
6353 * Iterates over the parameters for the method signature @sig.
6354 * A void* pointer must be initualized to #NULL to start the iteration
6355 * and it's address is passed to this function repeteadly until it returns
6356 * #NULL.
6357 *
6358 * Returns: the next parameter type of the method signature @sig,
6359 * #NULL when finished.
6360 */
6361 MonoType*
6362 mono_signature_get_params (MonoMethodSignature *sig, gpointer *iter)
6363 {
6364 MonoType** type;
6365 if (!iter)
6366 return NULL;
6367 if (!*iter) {
6368 /* start from the first */
6369 if (sig->param_count) {
6370 *iter = &sig->params [0];
6371 return sig->params [0];
6372 } else {
6373 /* no method */
6374 return NULL;
6375 }
6376 }
6377 type = *iter;
6378 type++;
6379 if (type < &sig->params [sig->param_count]) {
6380 *iter = type;
6381 return *type;
6382 }
6383 return NULL;
6384 }
6385
6386 /**
6387 * mono_signature_get_param_count:
6388 * @sig: the method signature inspected
6389 *
6390 * Returns: the number of parameters in the method signature @sig.
6391 */
6392 guint32
6393 mono_signature_get_param_count (MonoMethodSignature *sig)
6394 {
6395 return sig->param_count;
6396 }
6397
6398 /**
6399 * mono_signature_get_call_conv:
6400 * @sig: the method signature inspected
6401 *
6402 * Returns: the call convention of the method signature @sig.
6403 */
6404 guint32
6405 mono_signature_get_call_conv (MonoMethodSignature *sig)
6406 {
6407 return sig->call_convention;
6408 }
6409
6410 /**
6411 * mono_signature_vararg_start:
6412 * @sig: the method signature inspected
6413 *
6414 * Returns: the number of the first vararg parameter in the
6415 * method signature @sig. -1 if this is not a vararg signature.
6416 */
6417 int
6418 mono_signature_vararg_start (MonoMethodSignature *sig)
6419 {
6420 return sig->sentinelpos;
6421 }
6422
6423 /**
6424 * mono_signature_is_instance:
6425 * @sig: the method signature inspected
6426 *
6427 * Returns: #TRUE if this the method signature @sig has an implicit
6428 * first instance argument. #FALSE otherwise.
6429 */
6430 gboolean
6431 mono_signature_is_instance (MonoMethodSignature *sig)
6432 {
6433 return sig->hasthis;
6434 }
6435
6436 /**
6437 * mono_signature_param_is_out
6438 * @sig: the method signature inspected
6439 * @param_num: the 0-based index of the inspected parameter
6440 *
6441 * Returns: #TRUE if the parameter is an out parameter, #FALSE
6442 * otherwise.
6443 */
6444 mono_bool
6445 mono_signature_param_is_out (MonoMethodSignature *sig, int param_num)
6446 {
6447 g_assert (param_num >= 0 && param_num < sig->param_count);
6448 return (sig->params [param_num]->attrs & PARAM_ATTRIBUTE_OUT) != 0;
6449 }
6450
6451 /**
6452 * mono_signature_explicit_this:
6453 * @sig: the method signature inspected
6454 *
6455 * Returns: #TRUE if this the method signature @sig has an explicit
6456 * instance argument. #FALSE otherwise.
6457 */
6458 gboolean
6459 mono_signature_explicit_this (MonoMethodSignature *sig)
6460 {
6461 return sig->explicit_this;
6462 }
6463
6464 /* for use with allocated memory blocks (assumes alignment is to 8 bytes) */
6465 guint
6466 mono_aligned_addr_hash (gconstpointer ptr)
6467 {
6468 return GPOINTER_TO_UINT (ptr) >> 3;
6469 }
6470
6471 /*
6472 * If @field belongs to an inflated generic class, return the corresponding field of the
6473 * generic type definition class.
6474 */
6475 MonoClassField*
6476 mono_metadata_get_corresponding_field_from_generic_type_definition (MonoClassField *field)
6477 {
6478 MonoClass *gtd;
6479 int offset;
6480
6481 if (!field->parent->generic_class)
6482 return field;
6483
6484 gtd = field->parent->generic_class->container_class;
6485 offset = field - field->parent->fields;
6486 return gtd->fields + offset;
6487 }
6488
6489 /*
6490 * If @event belongs to an inflated generic class, return the corresponding event of the
6491 * generic type definition class.
6492 */
6493 MonoEvent*
6494 mono_metadata_get_corresponding_event_from_generic_type_definition (MonoEvent *event)
6495 {
6496 MonoClass *gtd;
6497 int offset;
6498
6499 if (!event->parent->generic_class)
6500 return event;
6501
6502 gtd = event->parent->generic_class->container_class;
6503 offset = event - event->parent->ext->events;
6504 return gtd->ext->events + offset;
6505 }
6506
6507 /*
6508 * If @property belongs to an inflated generic class, return the corresponding property of the
6509 * generic type definition class.
6510 */
6511 MonoProperty*
6512 mono_metadata_get_corresponding_property_from_generic_type_definition (MonoProperty *property)
6513 {
6514 MonoClass *gtd;
6515 int offset;
6516
6517 if (!property->parent->generic_class)
6518 return property;
6519
6520 gtd = property->parent->generic_class->container_class;
6521 offset = property - property->parent->ext->properties;
6522 return gtd->ext->properties + offset;
6523 }
6524
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