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2009-01-21 Mark Probst <mark.probst@gmail.com>
[mono-project.git] / mono / metadata / metadata.c
blobd48d11f2044d2082f66b57050cf3a200d02fbbc1
1 /*
2 * metadata.c: Routines for accessing the metadata
3 *
4 * Authors:
5 * Miguel de Icaza (miguel@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 *
8 * (C) 2001-2002 Ximian, Inc.
9 */
10
11 #include <config.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <glib.h>
16 #include "metadata.h"
17 #include "tabledefs.h"
18 #include "mono-endian.h"
19 #include "cil-coff.h"
20 #include "tokentype.h"
21 #include "metadata-internals.h"
22 #include "class-internals.h"
23 #include "class.h"
24
25 static gboolean do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
26 const char *ptr, const char **rptr);
27
28 static gboolean do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only);
29 static gboolean mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only);
30 static gboolean mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only);
31 static gboolean _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2,
32 gboolean signature_only);
33 static void free_generic_inst (MonoGenericInst *ginst);
34 static void free_generic_class (MonoGenericClass *ginst);
35 static void free_inflated_method (MonoMethodInflated *method);
36
37 /*
38 * This enumeration is used to describe the data types in the metadata
39 * tables
40 */
41 enum {
42 MONO_MT_END,
43
44 /* Sized elements */
45 MONO_MT_UINT32,
46 MONO_MT_UINT16,
47 MONO_MT_UINT8,
48
49 /* Index into Blob heap */
50 MONO_MT_BLOB_IDX,
51
52 /* Index into String heap */
53 MONO_MT_STRING_IDX,
54
55 /* GUID index */
56 MONO_MT_GUID_IDX,
57
58 /* Pointer into a table */
59 MONO_MT_TABLE_IDX,
60
61 /* HasConstant:Parent pointer (Param, Field or Property) */
62 MONO_MT_CONST_IDX,
63
64 /* HasCustomAttribute index. Indexes any table except CustomAttribute */
65 MONO_MT_HASCAT_IDX,
66
67 /* CustomAttributeType encoded index */
68 MONO_MT_CAT_IDX,
69
70 /* HasDeclSecurity index: TypeDef Method or Assembly */
71 MONO_MT_HASDEC_IDX,
72
73 /* Implementation coded index: File, Export AssemblyRef */
74 MONO_MT_IMPL_IDX,
75
76 /* HasFieldMarshal coded index: Field or Param table */
77 MONO_MT_HFM_IDX,
78
79 /* MemberForwardedIndex: Field or Method */
80 MONO_MT_MF_IDX,
81
82 /* TypeDefOrRef coded index: typedef, typeref, typespec */
83 MONO_MT_TDOR_IDX,
84
85 /* MemberRefParent coded index: typeref, moduleref, method, memberref, typesepc, typedef */
86 MONO_MT_MRP_IDX,
87
88 /* MethodDefOrRef coded index: Method or Member Ref table */
89 MONO_MT_MDOR_IDX,
90
91 /* HasSemantic coded index: Event or Property */
92 MONO_MT_HS_IDX,
93
94 /* ResolutionScope coded index: Module, ModuleRef, AssemblytRef, TypeRef */
95 MONO_MT_RS_IDX
96 };
97
98 const static unsigned char TableSchemas [] = {
99 #define ASSEMBLY_SCHEMA_OFFSET 0
100 MONO_MT_UINT32, /* "HashId" }, */
101 MONO_MT_UINT16, /* "Major" }, */
102 MONO_MT_UINT16, /* "Minor" }, */
103 MONO_MT_UINT16, /* "BuildNumber" }, */
104 MONO_MT_UINT16, /* "RevisionNumber" }, */
105 MONO_MT_UINT32, /* "Flags" }, */
106 MONO_MT_BLOB_IDX, /* "PublicKey" }, */
107 MONO_MT_STRING_IDX, /* "Name" }, */
108 MONO_MT_STRING_IDX, /* "Culture" }, */
109 MONO_MT_END,
110
111 #define ASSEMBLYOS_SCHEMA_OFFSET ASSEMBLY_SCHEMA_OFFSET + 10
112 MONO_MT_UINT32, /* "OSPlatformID" }, */
113 MONO_MT_UINT32, /* "OSMajor" }, */
114 MONO_MT_UINT32, /* "OSMinor" }, */
115 MONO_MT_END,
116
117 #define ASSEMBLYPROC_SCHEMA_OFFSET ASSEMBLYOS_SCHEMA_OFFSET + 4
118 MONO_MT_UINT32, /* "Processor" }, */
119 MONO_MT_END,
120
121 #define ASSEMBLYREF_SCHEMA_OFFSET ASSEMBLYPROC_SCHEMA_OFFSET + 2
122 MONO_MT_UINT16, /* "Major" }, */
123 MONO_MT_UINT16, /* "Minor" }, */
124 MONO_MT_UINT16, /* "Build" }, */
125 MONO_MT_UINT16, /* "Revision" }, */
126 MONO_MT_UINT32, /* "Flags" }, */
127 MONO_MT_BLOB_IDX, /* "PublicKeyOrToken" }, */
128 MONO_MT_STRING_IDX, /* "Name" }, */
129 MONO_MT_STRING_IDX, /* "Culture" }, */
130 MONO_MT_BLOB_IDX, /* "HashValue" }, */
131 MONO_MT_END,
132
133 #define ASSEMBLYREFOS_SCHEMA_OFFSET ASSEMBLYREF_SCHEMA_OFFSET + 10
134 MONO_MT_UINT32, /* "OSPlatformID" }, */
135 MONO_MT_UINT32, /* "OSMajorVersion" }, */
136 MONO_MT_UINT32, /* "OSMinorVersion" }, */
137 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
138 MONO_MT_END,
139
140 #define ASSEMBLYREFPROC_SCHEMA_OFFSET ASSEMBLYREFOS_SCHEMA_OFFSET + 5
141 MONO_MT_UINT32, /* "Processor" }, */
142 MONO_MT_TABLE_IDX, /* "AssemblyRef:AssemblyRef" }, */
143 MONO_MT_END,
144
145 #define CLASS_LAYOUT_SCHEMA_OFFSET ASSEMBLYREFPROC_SCHEMA_OFFSET + 3
146 MONO_MT_UINT16, /* "PackingSize" }, */
147 MONO_MT_UINT32, /* "ClassSize" }, */
148 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
149 MONO_MT_END,
150
151 #define CONSTANT_SCHEMA_OFFSET CLASS_LAYOUT_SCHEMA_OFFSET + 4
152 MONO_MT_UINT8, /* "Type" }, */
153 MONO_MT_UINT8, /* "PaddingZero" }, */
154 MONO_MT_CONST_IDX, /* "Parent" }, */
155 MONO_MT_BLOB_IDX, /* "Value" }, */
156 MONO_MT_END,
157
158 #define CUSTOM_ATTR_SCHEMA_OFFSET CONSTANT_SCHEMA_OFFSET + 5
159 MONO_MT_HASCAT_IDX, /* "Parent" }, */
160 MONO_MT_CAT_IDX, /* "Type" }, */
161 MONO_MT_BLOB_IDX, /* "Value" }, */
162 MONO_MT_END,
163
164 #define DECL_SEC_SCHEMA_OFFSET CUSTOM_ATTR_SCHEMA_OFFSET + 4
165 MONO_MT_UINT16, /* "Action" }, */
166 MONO_MT_HASDEC_IDX, /* "Parent" }, */
167 MONO_MT_BLOB_IDX, /* "PermissionSet" }, */
168 MONO_MT_END,
169
170 #define EVENTMAP_SCHEMA_OFFSET DECL_SEC_SCHEMA_OFFSET + 4
171 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
172 MONO_MT_TABLE_IDX, /* "EventList:Event" }, */
173 MONO_MT_END,
174
175 #define EVENT_SCHEMA_OFFSET EVENTMAP_SCHEMA_OFFSET + 3
176 MONO_MT_UINT16, /* "EventFlags#EventAttribute" }, */
177 MONO_MT_STRING_IDX, /* "Name" }, */
178 MONO_MT_TABLE_IDX, /* "EventType" }, TypeDef or TypeRef */
179 MONO_MT_END,
180
181 #define EVENT_POINTER_SCHEMA_OFFSET EVENT_SCHEMA_OFFSET + 4
182 MONO_MT_TABLE_IDX, /* "Event" }, */
183 MONO_MT_END,
184
185 #define EXPORTED_TYPE_SCHEMA_OFFSET EVENT_POINTER_SCHEMA_OFFSET + 2
186 MONO_MT_UINT32, /* "Flags" }, */
187 MONO_MT_TABLE_IDX, /* "TypeDefId" }, */
188 MONO_MT_STRING_IDX, /* "TypeName" }, */
189 MONO_MT_STRING_IDX, /* "TypeNameSpace" }, */
190 MONO_MT_IMPL_IDX, /* "Implementation" }, */
191 MONO_MT_END,
192
193 #define FIELD_SCHEMA_OFFSET EXPORTED_TYPE_SCHEMA_OFFSET + 6
194 MONO_MT_UINT16, /* "Flags" }, */
195 MONO_MT_STRING_IDX, /* "Name" }, */
196 MONO_MT_BLOB_IDX, /* "Signature" }, */
197 MONO_MT_END,
198
199 #define FIELD_LAYOUT_SCHEMA_OFFSET FIELD_SCHEMA_OFFSET + 4
200 MONO_MT_UINT32, /* "Offset" }, */
201 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
202 MONO_MT_END,
203
204 #define FIELD_MARSHAL_SCHEMA_OFFSET FIELD_LAYOUT_SCHEMA_OFFSET + 3
205 MONO_MT_HFM_IDX, /* "Parent" }, */
206 MONO_MT_BLOB_IDX, /* "NativeType" }, */
207 MONO_MT_END,
208
209 #define FIELD_RVA_SCHEMA_OFFSET FIELD_MARSHAL_SCHEMA_OFFSET + 3
210 MONO_MT_UINT32, /* "RVA" }, */
211 MONO_MT_TABLE_IDX, /* "Field:Field" }, */
212 MONO_MT_END,
213
214 #define FIELD_POINTER_SCHEMA_OFFSET FIELD_RVA_SCHEMA_OFFSET + 3
215 MONO_MT_TABLE_IDX, /* "Field" }, */
216 MONO_MT_END,
217
218 #define FILE_SCHEMA_OFFSET FIELD_POINTER_SCHEMA_OFFSET + 2
219 MONO_MT_UINT32, /* "Flags" }, */
220 MONO_MT_STRING_IDX, /* "Name" }, */
221 MONO_MT_BLOB_IDX, /* "Value" }, */
222 MONO_MT_END,
223
224 #define IMPLMAP_SCHEMA_OFFSET FILE_SCHEMA_OFFSET + 4
225 MONO_MT_UINT16, /* "MappingFlag" }, */
226 MONO_MT_MF_IDX, /* "MemberForwarded" }, */
227 MONO_MT_STRING_IDX, /* "ImportName" }, */
228 MONO_MT_TABLE_IDX, /* "ImportScope:ModuleRef" }, */
229 MONO_MT_END,
230
231 #define IFACEMAP_SCHEMA_OFFSET IMPLMAP_SCHEMA_OFFSET + 5
232 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
233 MONO_MT_TDOR_IDX, /* "Interface=TypeDefOrRef" }, */
234 MONO_MT_END,
235
236 #define MANIFEST_SCHEMA_OFFSET IFACEMAP_SCHEMA_OFFSET + 3
237 MONO_MT_UINT32, /* "Offset" }, */
238 MONO_MT_UINT32, /* "Flags" }, */
239 MONO_MT_STRING_IDX, /* "Name" }, */
240 MONO_MT_IMPL_IDX, /* "Implementation" }, */
241 MONO_MT_END,
242
243 #define MEMBERREF_SCHEMA_OFFSET MANIFEST_SCHEMA_OFFSET + 5
244 MONO_MT_MRP_IDX, /* "Class" }, */
245 MONO_MT_STRING_IDX, /* "Name" }, */
246 MONO_MT_BLOB_IDX, /* "Signature" }, */
247 MONO_MT_END,
248
249 #define METHOD_SCHEMA_OFFSET MEMBERREF_SCHEMA_OFFSET + 4
250 MONO_MT_UINT32, /* "RVA" }, */
251 MONO_MT_UINT16, /* "ImplFlags#MethodImplAttributes" }, */
252 MONO_MT_UINT16, /* "Flags#MethodAttribute" }, */
253 MONO_MT_STRING_IDX, /* "Name" }, */
254 MONO_MT_BLOB_IDX, /* "Signature" }, */
255 MONO_MT_TABLE_IDX, /* "ParamList:Param" }, */
256 MONO_MT_END,
257
258 #define METHOD_IMPL_SCHEMA_OFFSET METHOD_SCHEMA_OFFSET + 7
259 MONO_MT_TABLE_IDX, /* "Class:TypeDef" }, */
260 MONO_MT_MDOR_IDX, /* "MethodBody" }, */
261 MONO_MT_MDOR_IDX, /* "MethodDeclaration" }, */
262 MONO_MT_END,
263
264 #define METHOD_SEMA_SCHEMA_OFFSET METHOD_IMPL_SCHEMA_OFFSET + 4
265 MONO_MT_UINT16, /* "MethodSemantic" }, */
266 MONO_MT_TABLE_IDX, /* "Method:Method" }, */
267 MONO_MT_HS_IDX, /* "Association" }, */
268 MONO_MT_END,
269
270 #define METHOD_POINTER_SCHEMA_OFFSET METHOD_SEMA_SCHEMA_OFFSET + 4
271 MONO_MT_TABLE_IDX, /* "Method" }, */
272 MONO_MT_END,
273
274 #define MODULE_SCHEMA_OFFSET METHOD_POINTER_SCHEMA_OFFSET + 2
275 MONO_MT_UINT16, /* "Generation" }, */
276 MONO_MT_STRING_IDX, /* "Name" }, */
277 MONO_MT_GUID_IDX, /* "MVID" }, */
278 MONO_MT_GUID_IDX, /* "EncID" }, */
279 MONO_MT_GUID_IDX, /* "EncBaseID" }, */
280 MONO_MT_END,
281
282 #define MODULEREF_SCHEMA_OFFSET MODULE_SCHEMA_OFFSET + 6
283 MONO_MT_STRING_IDX, /* "Name" }, */
284 MONO_MT_END,
285
286 #define NESTED_CLASS_SCHEMA_OFFSET MODULEREF_SCHEMA_OFFSET + 2
287 MONO_MT_TABLE_IDX, /* "NestedClass:TypeDef" }, */
288 MONO_MT_TABLE_IDX, /* "EnclosingClass:TypeDef" }, */
289 MONO_MT_END,
290
291 #define PARAM_SCHEMA_OFFSET NESTED_CLASS_SCHEMA_OFFSET + 3
292 MONO_MT_UINT16, /* "Flags" }, */
293 MONO_MT_UINT16, /* "Sequence" }, */
294 MONO_MT_STRING_IDX, /* "Name" }, */
295 MONO_MT_END,
296
297 #define PARAM_POINTER_SCHEMA_OFFSET PARAM_SCHEMA_OFFSET + 4
298 MONO_MT_TABLE_IDX, /* "Param" }, */
299 MONO_MT_END,
300
301 #define PROPERTY_SCHEMA_OFFSET PARAM_POINTER_SCHEMA_OFFSET + 2
302 MONO_MT_UINT16, /* "Flags" }, */
303 MONO_MT_STRING_IDX, /* "Name" }, */
304 MONO_MT_BLOB_IDX, /* "Type" }, */
305 MONO_MT_END,
306
307 #define PROPERTY_POINTER_SCHEMA_OFFSET PROPERTY_SCHEMA_OFFSET + 4
308 MONO_MT_TABLE_IDX, /* "Property" }, */
309 MONO_MT_END,
310
311 #define PROPERTY_MAP_SCHEMA_OFFSET PROPERTY_POINTER_SCHEMA_OFFSET + 2
312 MONO_MT_TABLE_IDX, /* "Parent:TypeDef" }, */
313 MONO_MT_TABLE_IDX, /* "PropertyList:Property" }, */
314 MONO_MT_END,
315
316 #define STDALON_SIG_SCHEMA_OFFSET PROPERTY_MAP_SCHEMA_OFFSET + 3
317 MONO_MT_BLOB_IDX, /* "Signature" }, */
318 MONO_MT_END,
319
320 #define TYPEDEF_SCHEMA_OFFSET STDALON_SIG_SCHEMA_OFFSET + 2
321 MONO_MT_UINT32, /* "Flags" }, */
322 MONO_MT_STRING_IDX, /* "Name" }, */
323 MONO_MT_STRING_IDX, /* "Namespace" }, */
324 MONO_MT_TDOR_IDX, /* "Extends" }, */
325 MONO_MT_TABLE_IDX, /* "FieldList:Field" }, */
326 MONO_MT_TABLE_IDX, /* "MethodList:Method" }, */
327 MONO_MT_END,
328
329 #define TYPEREF_SCHEMA_OFFSET TYPEDEF_SCHEMA_OFFSET + 7
330 MONO_MT_RS_IDX, /* "ResolutionScope=ResolutionScope" }, */
331 MONO_MT_STRING_IDX, /* "Name" }, */
332 MONO_MT_STRING_IDX, /* "Namespace" }, */
333 MONO_MT_END,
334
335 #define TYPESPEC_SCHEMA_OFFSET TYPEREF_SCHEMA_OFFSET + 4
336 MONO_MT_BLOB_IDX, /* "Signature" }, */
337 MONO_MT_END,
338
339 #define GENPARAM_SCHEMA_OFFSET TYPESPEC_SCHEMA_OFFSET + 2
340 MONO_MT_UINT16, /* "Number" }, */
341 MONO_MT_UINT16, /* "Flags" }, */
342 MONO_MT_TABLE_IDX, /* "Owner" }, TypeDef or MethodDef */
343 MONO_MT_STRING_IDX, /* "Name" }, */
344 MONO_MT_END,
345
346 #define METHOD_SPEC_SCHEMA_OFFSET GENPARAM_SCHEMA_OFFSET + 5
347 MONO_MT_MDOR_IDX, /* "Method" }, */
348 MONO_MT_BLOB_IDX, /* "Signature" }, */
349 MONO_MT_END,
350
351 #define GEN_CONSTRAINT_SCHEMA_OFFSET METHOD_SPEC_SCHEMA_OFFSET + 3
352 MONO_MT_TABLE_IDX, /* "GenericParam" }, */
353 MONO_MT_TDOR_IDX, /* "Constraint" }, */
354 MONO_MT_END,
355
356 #define NULL_SCHEMA_OFFSET GEN_CONSTRAINT_SCHEMA_OFFSET + 3
357 MONO_MT_END
358 };
359
360 /* Must be the same order as MONO_TABLE_* */
361 const static unsigned char
362 table_description [] = {
363 MODULE_SCHEMA_OFFSET,
364 TYPEREF_SCHEMA_OFFSET,
365 TYPEDEF_SCHEMA_OFFSET,
366 FIELD_POINTER_SCHEMA_OFFSET,
367 FIELD_SCHEMA_OFFSET,
368 METHOD_POINTER_SCHEMA_OFFSET,
369 METHOD_SCHEMA_OFFSET,
370 PARAM_POINTER_SCHEMA_OFFSET,
371 PARAM_SCHEMA_OFFSET,
372 IFACEMAP_SCHEMA_OFFSET,
373 MEMBERREF_SCHEMA_OFFSET, /* 0xa */
374 CONSTANT_SCHEMA_OFFSET,
375 CUSTOM_ATTR_SCHEMA_OFFSET,
376 FIELD_MARSHAL_SCHEMA_OFFSET,
377 DECL_SEC_SCHEMA_OFFSET,
378 CLASS_LAYOUT_SCHEMA_OFFSET,
379 FIELD_LAYOUT_SCHEMA_OFFSET, /* 0x10 */
380 STDALON_SIG_SCHEMA_OFFSET,
381 EVENTMAP_SCHEMA_OFFSET,
382 EVENT_POINTER_SCHEMA_OFFSET,
383 EVENT_SCHEMA_OFFSET,
384 PROPERTY_MAP_SCHEMA_OFFSET,
385 PROPERTY_POINTER_SCHEMA_OFFSET,
386 PROPERTY_SCHEMA_OFFSET,
387 METHOD_SEMA_SCHEMA_OFFSET,
388 METHOD_IMPL_SCHEMA_OFFSET,
389 MODULEREF_SCHEMA_OFFSET, /* 0x1a */
390 TYPESPEC_SCHEMA_OFFSET,
391 IMPLMAP_SCHEMA_OFFSET,
392 FIELD_RVA_SCHEMA_OFFSET,
393 NULL_SCHEMA_OFFSET,
394 NULL_SCHEMA_OFFSET,
395 ASSEMBLY_SCHEMA_OFFSET, /* 0x20 */
396 ASSEMBLYPROC_SCHEMA_OFFSET,
397 ASSEMBLYOS_SCHEMA_OFFSET,
398 ASSEMBLYREF_SCHEMA_OFFSET,
399 ASSEMBLYREFPROC_SCHEMA_OFFSET,
400 ASSEMBLYREFOS_SCHEMA_OFFSET,
401 FILE_SCHEMA_OFFSET,
402 EXPORTED_TYPE_SCHEMA_OFFSET,
403 MANIFEST_SCHEMA_OFFSET,
404 NESTED_CLASS_SCHEMA_OFFSET,
405 GENPARAM_SCHEMA_OFFSET, /* 0x2a */
406 METHOD_SPEC_SCHEMA_OFFSET,
407 GEN_CONSTRAINT_SCHEMA_OFFSET
408 };
409
410 #ifdef HAVE_ARRAY_ELEM_INIT
411 #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
412 #define MSGSTRFIELD1(line) str##line
413 static const struct msgstr_t {
414 #define TABLEDEF(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
415 #include "mono/cil/tables.def"
416 #undef TABLEDEF
417 } tablestr = {
418 #define TABLEDEF(a,b) b,
419 #include "mono/cil/tables.def"
420 #undef TABLEDEF
421 };
422 static const gint16 tableidx [] = {
423 #define TABLEDEF(a,b) [a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
424 #include "mono/cil/tables.def"
425 #undef TABLEDEF
426 };
427
428 #else
429 #define TABLEDEF(a,b) b,
430 static const char* const
431 mono_tables_names [] = {
432 #include "mono/cil/tables.def"
433 NULL
434 };
435
436 #endif
437
438 /* Auxiliary structure used for caching inflated signatures */
439 typedef struct {
440 MonoMethodSignature *sig;
441 MonoGenericContext context;
442 } MonoInflatedMethodSignature;
443
444 /**
445 * mono_image_alloc_lock:
446 *
447 * Same as mono_image_alloc, but do the locking as well.
448 * LOCKING: Acquires the loader lock.
449 */
450 static gpointer
451 mono_image_alloc_lock (MonoImage *image, guint size)
452 {
453 gpointer res;
454
455 mono_loader_lock ();
456 res = mono_image_alloc (image, size);
457 mono_loader_unlock ();
458
459 return res;
460 }
461
462 /**
463 * mono_image_alloc0_lock:
464 *
465 * Same as mono_image_alloc, but do the locking as well.
466 * LOCKING: Acquires the loader lock.
467 */
468 static gpointer
469 mono_image_alloc0_lock (MonoImage *image, guint size)
470 {
471 gpointer res;
472
473 mono_loader_lock ();
474 res = mono_image_alloc0 (image, size);
475 mono_loader_unlock ();
476
477 return res;
478 }
479
480 /**
481 * mono_meta_table_name:
482 * @table: table index
483 *
484 * Returns the name of the given ECMA metadata logical format table
485 * as described in ECMA 335, Partition II, Section 22.
486 *
487 * Returns: the name for the @table index
488 */
489 const char *
490 mono_meta_table_name (int table)
491 {
492 if ((table < 0) || (table > MONO_TABLE_LAST))
493 return "";
494
495 #ifdef HAVE_ARRAY_ELEM_INIT
496 return (const char*)&tablestr + tableidx [table];
497 #else
498 return mono_tables_names [table];
499 #endif
500 }
501
502 /* The guy who wrote the spec for this should not be allowed near a
503 * computer again.
504
505 If e is a coded token(see clause 23.1.7) that points into table ti out of n possible tables t0, .. tn-1,
506 then it is stored as e << (log n) & tag{ t0, .. tn-1}[ ti] using 2 bytes if the maximum number of
507 rows of tables t0, ..tn-1, is less than 2^16 - (log n), and using 4 bytes otherwise. The family of
508 finite maps tag{ t0, ..tn-1} is defined below. Note that to decode a physical row, you need the
509 inverse of this mapping.
510
511 */
512 #define rtsize(s,b) (((s) < (1 << (b)) ? 2 : 4))
513 #define idx_size(tableidx) (meta->tables [(tableidx)].rows < 65536 ? 2 : 4)
514
515 /* Reference: Partition II - 23.2.6 */
516 /*
517 * mono_metadata_compute_size:
518 * @meta: metadata context
519 * @tableindex: metadata table number
520 * @result_bitfield: pointer to guint32 where to store additional info
521 *
522 * mono_metadata_compute_size() computes the lenght in bytes of a single
523 * row in a metadata table. The size of each column is encoded in the
524 * @result_bitfield return value along with the number of columns in the table.
525 * the resulting bitfield should be handed to the mono_metadata_table_size()
526 * and mono_metadata_table_count() macros.
527 * This is a Mono runtime internal only function.
528 */
529 int
530 mono_metadata_compute_size (MonoImage *meta, int tableindex, guint32 *result_bitfield)
531 {
532 guint32 bitfield = 0;
533 int size = 0, field_size = 0;
534 int i, n, code;
535 int shift = 0;
536 const unsigned char *description = TableSchemas + table_description [tableindex];
537
538 for (i = 0; (code = description [i]) != MONO_MT_END; i++){
539 switch (code){
540 case MONO_MT_UINT32:
541 field_size = 4; break;
542
543 case MONO_MT_UINT16:
544 field_size = 2; break;
545
546 case MONO_MT_UINT8:
547 field_size = 1; break;
548
549 case MONO_MT_BLOB_IDX:
550 field_size = meta->idx_blob_wide ? 4 : 2; break;
551
552 case MONO_MT_STRING_IDX:
553 field_size = meta->idx_string_wide ? 4 : 2; break;
554
555 case MONO_MT_GUID_IDX:
556 field_size = meta->idx_guid_wide ? 4 : 2; break;
557
558 case MONO_MT_TABLE_IDX:
559 /* Uhm, a table index can point to other tables besides the current one
560 * so, it's not correct to use the rowcount of the current table to
561 * get the size for this column - lupus
562 */
563 switch (tableindex) {
564 case MONO_TABLE_ASSEMBLYREFOS:
565 g_assert (i == 3);
566 field_size = idx_size (MONO_TABLE_ASSEMBLYREF); break;
567 case MONO_TABLE_ASSEMBLYPROCESSOR:
568 g_assert (i == 1);
569 field_size = idx_size (MONO_TABLE_ASSEMBLYREF); break;
570 case MONO_TABLE_CLASSLAYOUT:
571 g_assert (i == 2);
572 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
573 case MONO_TABLE_EVENTMAP:
574 g_assert (i == 0 || i == 1);
575 field_size = i ? idx_size (MONO_TABLE_EVENT):
576 idx_size(MONO_TABLE_TYPEDEF);
577 break;
578 case MONO_TABLE_EVENT:
579 g_assert (i == 2);
580 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows, meta->tables [MONO_TABLE_TYPEREF].rows);
581 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
582 /*This is a coded token for 3 tables, so takes 2 bits */
583 field_size = rtsize (n, 16 - MONO_TYPEDEFORREF_BITS);
584 break;
585 case MONO_TABLE_EVENT_POINTER:
586 g_assert (i == 0);
587 field_size = idx_size (MONO_TABLE_EVENT); break;
588 case MONO_TABLE_EXPORTEDTYPE:
589 g_assert (i == 1);
590 /* the index is in another metadata file, so it must be 4 */
591 field_size = 4; break;
592 case MONO_TABLE_FIELDLAYOUT:
593 g_assert (i == 1);
594 field_size = idx_size (MONO_TABLE_FIELD); break;
595 case MONO_TABLE_FIELDRVA:
596 g_assert (i == 1);
597 field_size = idx_size (MONO_TABLE_FIELD); break;
598 case MONO_TABLE_FIELD_POINTER:
599 g_assert (i == 0);
600 field_size = idx_size (MONO_TABLE_FIELD); break;
601 case MONO_TABLE_IMPLMAP:
602 g_assert (i == 3);
603 field_size = idx_size (MONO_TABLE_MODULEREF); break;
604 case MONO_TABLE_INTERFACEIMPL:
605 g_assert (i == 0);
606 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
607 case MONO_TABLE_METHOD:
608 g_assert (i == 5);
609 field_size = idx_size (MONO_TABLE_PARAM); break;
610 case MONO_TABLE_METHODIMPL:
611 g_assert (i == 0);
612 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
613 case MONO_TABLE_METHODSEMANTICS:
614 g_assert (i == 1);
615 field_size = idx_size (MONO_TABLE_METHOD); break;
616 case MONO_TABLE_METHOD_POINTER:
617 g_assert (i == 0);
618 field_size = idx_size (MONO_TABLE_METHOD); break;
619 case MONO_TABLE_NESTEDCLASS:
620 g_assert (i == 0 || i == 1);
621 field_size = idx_size (MONO_TABLE_TYPEDEF); break;
622 case MONO_TABLE_PARAM_POINTER:
623 g_assert (i == 0);
624 field_size = idx_size (MONO_TABLE_PARAM); break;
625 case MONO_TABLE_PROPERTYMAP:
626 g_assert (i == 0 || i == 1);
627 field_size = i ? idx_size (MONO_TABLE_PROPERTY):
628 idx_size(MONO_TABLE_TYPEDEF);
629 break;
630 case MONO_TABLE_PROPERTY_POINTER:
631 g_assert (i == 0);
632 field_size = idx_size (MONO_TABLE_PROPERTY); break;
633 case MONO_TABLE_TYPEDEF:
634 g_assert (i == 4 || i == 5);
635 field_size = i == 4 ? idx_size (MONO_TABLE_FIELD):
636 idx_size(MONO_TABLE_METHOD);
637 break;
638 case MONO_TABLE_GENERICPARAM:
639 g_assert (i == 2 || i == 4 || i == 5);
640 if (i == 2) {
641 n = MAX (meta->tables [MONO_TABLE_METHOD].rows, meta->tables [MONO_TABLE_TYPEDEF].rows);
642 /*This is a coded token for 2 tables, so takes 1 bit */
643 field_size = rtsize (n, 16 - MONO_TYPEORMETHOD_BITS);
644 } else if (i == 4)
645 field_size = idx_size (MONO_TABLE_TYPEDEF);
646 else if (i == 5)
647 field_size = idx_size (MONO_TABLE_TYPEDEF);
648 break;
649
650 case MONO_TABLE_GENERICPARAMCONSTRAINT:
651 g_assert (i == 0);
652 field_size = idx_size (MONO_TABLE_GENERICPARAM);
653 break;
654
655 default:
656 g_assert_not_reached ();
657 }
658 break;
659
660 /*
661 * HasConstant: ParamDef, FieldDef, Property
662 */
663 case MONO_MT_CONST_IDX:
664 n = MAX (meta->tables [MONO_TABLE_PARAM].rows,
665 meta->tables [MONO_TABLE_FIELD].rows);
666 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
667
668 /* 2 bits to encode tag */
669 field_size = rtsize (n, 16-2);
670 break;
671
672 /*
673 * HasCustomAttribute: points to any table but
674 * itself.
675 */
676 case MONO_MT_HASCAT_IDX:
677 /*
678 * We believe that since the signature and
679 * permission are indexing the Blob heap,
680 * we should consider the blob size first
681 */
682 /* I'm not a believer - lupus
683 if (meta->idx_blob_wide){
684 field_size = 4;
685 break;
686 }*/
687
688 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
689 meta->tables [MONO_TABLE_FIELD].rows);
690 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
691 n = MAX (n, meta->tables [MONO_TABLE_TYPEDEF].rows);
692 n = MAX (n, meta->tables [MONO_TABLE_PARAM].rows);
693 n = MAX (n, meta->tables [MONO_TABLE_INTERFACEIMPL].rows);
694 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
695 n = MAX (n, meta->tables [MONO_TABLE_MODULE].rows);
696 n = MAX (n, meta->tables [MONO_TABLE_DECLSECURITY].rows);
697 n = MAX (n, meta->tables [MONO_TABLE_PROPERTY].rows);
698 n = MAX (n, meta->tables [MONO_TABLE_EVENT].rows);
699 n = MAX (n, meta->tables [MONO_TABLE_STANDALONESIG].rows);
700 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
701 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
702 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
703 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
704 n = MAX (n, meta->tables [MONO_TABLE_FILE].rows);
705 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
706 n = MAX (n, meta->tables [MONO_TABLE_MANIFESTRESOURCE].rows);
707
708 /* 5 bits to encode */
709 field_size = rtsize (n, 16-5);
710 break;
711
712 /*
713 * CustomAttributeType: TypeDef, TypeRef, MethodDef,
714 * MemberRef and String.
715 */
716 case MONO_MT_CAT_IDX:
717 /* String is a heap, if it is wide, we know the size */
718 /* See above, nope.
719 if (meta->idx_string_wide){
720 field_size = 4;
721 break;
722 }*/
723
724 n = MAX (meta->tables [MONO_TABLE_TYPEREF].rows,
725 meta->tables [MONO_TABLE_TYPEDEF].rows);
726 n = MAX (n, meta->tables [MONO_TABLE_METHOD].rows);
727 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
728
729 /* 3 bits to encode */
730 field_size = rtsize (n, 16-3);
731 break;
732
733 /*
734 * HasDeclSecurity: Typedef, MethodDef, Assembly
735 */
736 case MONO_MT_HASDEC_IDX:
737 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
738 meta->tables [MONO_TABLE_METHOD].rows);
739 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLY].rows);
740
741 /* 2 bits to encode */
742 field_size = rtsize (n, 16-2);
743 break;
744
745 /*
746 * Implementation: File, AssemblyRef, ExportedType
747 */
748 case MONO_MT_IMPL_IDX:
749 n = MAX (meta->tables [MONO_TABLE_FILE].rows,
750 meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
751 n = MAX (n, meta->tables [MONO_TABLE_EXPORTEDTYPE].rows);
752
753 /* 2 bits to encode tag */
754 field_size = rtsize (n, 16-2);
755 break;
756
757 /*
758 * HasFieldMarshall: FieldDef, ParamDef
759 */
760 case MONO_MT_HFM_IDX:
761 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
762 meta->tables [MONO_TABLE_PARAM].rows);
763
764 /* 1 bit used to encode tag */
765 field_size = rtsize (n, 16-1);
766 break;
767
768 /*
769 * MemberForwarded: FieldDef, MethodDef
770 */
771 case MONO_MT_MF_IDX:
772 n = MAX (meta->tables [MONO_TABLE_FIELD].rows,
773 meta->tables [MONO_TABLE_METHOD].rows);
774
775 /* 1 bit used to encode tag */
776 field_size = rtsize (n, 16-1);
777 break;
778
779 /*
780 * TypeDefOrRef: TypeDef, ParamDef, TypeSpec
781 * LAMESPEC
782 * It is TypeDef, _TypeRef_, TypeSpec, instead.
783 */
784 case MONO_MT_TDOR_IDX:
785 n = MAX (meta->tables [MONO_TABLE_TYPEDEF].rows,
786 meta->tables [MONO_TABLE_TYPEREF].rows);
787 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
788
789 /* 2 bits to encode */
790 field_size = rtsize (n, 16-2);
791 break;
792
793 /*
794 * MemberRefParent: TypeDef, TypeRef, MethodDef, ModuleRef, TypeSpec, MemberRef
795 */
796 case MONO_MT_MRP_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_METHOD].rows);
800 n = MAX (n, meta->tables [MONO_TABLE_MODULEREF].rows);
801 n = MAX (n, meta->tables [MONO_TABLE_TYPESPEC].rows);
802 n = MAX (n, meta->tables [MONO_TABLE_MEMBERREF].rows);
803
804 /* 3 bits to encode */
805 field_size = rtsize (n, 16 - 3);
806 break;
807
808 /*
809 * MethodDefOrRef: MethodDef, MemberRef
810 */
811 case MONO_MT_MDOR_IDX:
812 n = MAX (meta->tables [MONO_TABLE_METHOD].rows,
813 meta->tables [MONO_TABLE_MEMBERREF].rows);
814
815 /* 1 bit used to encode tag */
816 field_size = rtsize (n, 16-1);
817 break;
818
819 /*
820 * HasSemantics: Property, Event
821 */
822 case MONO_MT_HS_IDX:
823 n = MAX (meta->tables [MONO_TABLE_PROPERTY].rows,
824 meta->tables [MONO_TABLE_EVENT].rows);
825
826 /* 1 bit used to encode tag */
827 field_size = rtsize (n, 16-1);
828 break;
829
830 /*
831 * ResolutionScope: Module, ModuleRef, AssemblyRef, TypeRef
832 */
833 case MONO_MT_RS_IDX:
834 n = MAX (meta->tables [MONO_TABLE_MODULE].rows,
835 meta->tables [MONO_TABLE_MODULEREF].rows);
836 n = MAX (n, meta->tables [MONO_TABLE_ASSEMBLYREF].rows);
837 n = MAX (n, meta->tables [MONO_TABLE_TYPEREF].rows);
838
839 /* 2 bits used to encode tag (ECMA spec claims 3) */
840 field_size = rtsize (n, 16 - 2);
841 break;
842 }
843
844 /*
845 * encode field size as follows (we just need to
846 * distinguish them).
847 *
848 * 4 -> 3
849 * 2 -> 1
850 * 1 -> 0
851 */
852 bitfield |= (field_size-1) << shift;
853 shift += 2;
854 size += field_size;
855 /*g_print ("table %02x field %d size %d\n", tableindex, i, field_size);*/
856 }
857
858 *result_bitfield = (i << 24) | bitfield;
859 return size;
860 }
861
862 /**
863 * mono_metadata_compute_table_bases:
864 * @meta: metadata context to compute table values
865 *
866 * Computes the table bases for the metadata structure.
867 * This is an internal function used by the image loader code.
868 */
869 void
870 mono_metadata_compute_table_bases (MonoImage *meta)
871 {
872 int i;
873 const char *base = meta->tables_base;
874
875 for (i = 0; i < MONO_TABLE_NUM; i++) {
876 MonoTableInfo *table = &meta->tables [i];
877 if (table->rows == 0)
878 continue;
879
880 table->row_size = mono_metadata_compute_size (meta, i, &table->size_bitfield);
881 table->base = base;
882 base += table->rows * table->row_size;
883 }
884 }
885
886 /**
887 * mono_metadata_locate:
888 * @meta: metadata context
889 * @table: table code.
890 * @idx: index of element to retrieve from @table.
891 *
892 * Returns: a pointer to the @idx element in the metadata table
893 * whose code is @table.
894 */
895 const char *
896 mono_metadata_locate (MonoImage *meta, int table, int idx)
897 {
898 /* idx == 0 refers always to NULL */
899 g_return_val_if_fail (idx > 0 && idx <= meta->tables [table].rows, "");
900
901 return meta->tables [table].base + (meta->tables [table].row_size * (idx - 1));
902 }
903
904 /**
905 * mono_metadata_locate_token:
906 * @meta: metadata context
907 * @token: metadata token
908 *
909 * Returns: a pointer to the data in the metadata represented by the
910 * token #token.
911 */
912 const char *
913 mono_metadata_locate_token (MonoImage *meta, guint32 token)
914 {
915 return mono_metadata_locate (meta, token >> 24, token & 0xffffff);
916 }
917
918 /**
919 * mono_metadata_string_heap:
920 * @meta: metadata context
921 * @index: index into the string heap.
922 *
923 * Returns: an in-memory pointer to the @index in the string heap.
924 */
925 const char *
926 mono_metadata_string_heap (MonoImage *meta, guint32 index)
927 {
928 g_return_val_if_fail (index < meta->heap_strings.size, "");
929 return meta->heap_strings.data + index;
930 }
931
932 /**
933 * mono_metadata_user_string:
934 * @meta: metadata context
935 * @index: index into the user string heap.
936 *
937 * Returns: an in-memory pointer to the @index in the user string heap ("#US").
938 */
939 const char *
940 mono_metadata_user_string (MonoImage *meta, guint32 index)
941 {
942 g_return_val_if_fail (index < meta->heap_us.size, "");
943 return meta->heap_us.data + index;
944 }
945
946 /**
947 * mono_metadata_blob_heap:
948 * @meta: metadata context
949 * @index: index into the blob.
950 *
951 * Returns: an in-memory pointer to the @index in the Blob heap.
952 */
953 const char *
954 mono_metadata_blob_heap (MonoImage *meta, guint32 index)
955 {
956 g_return_val_if_fail (index < meta->heap_blob.size, "");
957 return meta->heap_blob.data + index;
958 }
959
960 /**
961 * mono_metadata_guid_heap:
962 * @meta: metadata context
963 * @index: index into the guid heap.
964 *
965 * Returns: an in-memory pointer to the @index in the guid heap.
966 */
967 const char *
968 mono_metadata_guid_heap (MonoImage *meta, guint32 index)
969 {
970 --index;
971 index *= 16; /* adjust for guid size and 1-based index */
972 g_return_val_if_fail (index < meta->heap_guid.size, "");
973 return meta->heap_guid.data + index;
974 }
975
976 static const unsigned char *
977 dword_align (const unsigned char *ptr)
978 {
979 #if SIZEOF_VOID_P == 8
980 return (const unsigned char *) (((guint64) (ptr + 3)) & ~3);
981 #else
982 return (const unsigned char *) (((guint32) (ptr + 3)) & ~3);
983 #endif
984 }
985
986 /**
987 * mono_metadata_decode_row:
988 * @t: table to extract information from.
989 * @idx: index in table.
990 * @res: array of @res_size cols to store the results in
991 *
992 * This decompresses the metadata element @idx in table @t
993 * into the guint32 @res array that has res_size elements
994 */
995 void
996 mono_metadata_decode_row (const MonoTableInfo *t, int idx, guint32 *res, int res_size)
997 {
998 guint32 bitfield = t->size_bitfield;
999 int i, count = mono_metadata_table_count (bitfield);
1000 const char *data;
1001
1002 g_assert (idx < t->rows);
1003 data = t->base + idx * t->row_size;
1004
1005 g_assert (res_size == count);
1006
1007 for (i = 0; i < count; i++) {
1008 int n = mono_metadata_table_size (bitfield, i);
1009
1010 switch (n){
1011 case 1:
1012 res [i] = *data; break;
1013 case 2:
1014 res [i] = read16 (data); break;
1015 case 4:
1016 res [i] = read32 (data); break;
1017 default:
1018 g_assert_not_reached ();
1019 }
1020 data += n;
1021 }
1022 }
1023
1024 /**
1025 * mono_metadata_decode_row_col:
1026 * @t: table to extract information from.
1027 * @idx: index for row in table.
1028 * @col: column in the row.
1029 *
1030 * This function returns the value of column @col from the @idx
1031 * row in the table @t.
1032 */
1033 guint32
1034 mono_metadata_decode_row_col (const MonoTableInfo *t, int idx, guint col)
1035 {
1036 guint32 bitfield = t->size_bitfield;
1037 int i;
1038 register const char *data;
1039 register int n;
1040
1041 g_assert (idx < t->rows);
1042 g_assert (col < mono_metadata_table_count (bitfield));
1043 data = t->base + idx * t->row_size;
1044
1045 n = mono_metadata_table_size (bitfield, 0);
1046 for (i = 0; i < col; ++i) {
1047 data += n;
1048 n = mono_metadata_table_size (bitfield, i + 1);
1049 }
1050 switch (n) {
1051 case 1:
1052 return *data;
1053 case 2:
1054 return read16 (data);
1055 case 4:
1056 return read32 (data);
1057 default:
1058 g_assert_not_reached ();
1059 }
1060 return 0;
1061 }
1062
1063 /**
1064 * mono_metadata_decode_blob_size:
1065 * @ptr: pointer to a blob object
1066 * @rptr: the new position of the pointer
1067 *
1068 * This decodes a compressed size as described by 23.1.4 (a blob or user string object)
1069 *
1070 * Returns: the size of the blob object
1071 */
1072 guint32
1073 mono_metadata_decode_blob_size (const char *xptr, const char **rptr)
1074 {
1075 const unsigned char *ptr = (const unsigned char *)xptr;
1076 guint32 size;
1077
1078 if ((*ptr & 0x80) == 0){
1079 size = ptr [0] & 0x7f;
1080 ptr++;
1081 } else if ((*ptr & 0x40) == 0){
1082 size = ((ptr [0] & 0x3f) << 8) + ptr [1];
1083 ptr += 2;
1084 } else {
1085 size = ((ptr [0] & 0x1f) << 24) +
1086 (ptr [1] << 16) +
1087 (ptr [2] << 8) +
1088 ptr [3];
1089 ptr += 4;
1090 }
1091 if (rptr)
1092 *rptr = (char*)ptr;
1093 return size;
1094 }
1095
1096 /**
1097 * mono_metadata_decode_value:
1098 * @ptr: pointer to decode from
1099 * @rptr: the new position of the pointer
1100 *
1101 * This routine decompresses 32-bit values as specified in the "Blob and
1102 * Signature" section (22.2)
1103 *
1104 * Returns: the decoded value
1105 */
1106 guint32
1107 mono_metadata_decode_value (const char *_ptr, const char **rptr)
1108 {
1109 const unsigned char *ptr = (const unsigned char *) _ptr;
1110 unsigned char b = *ptr;
1111 guint32 len;
1112
1113 if ((b & 0x80) == 0){
1114 len = b;
1115 ++ptr;
1116 } else if ((b & 0x40) == 0){
1117 len = ((b & 0x3f) << 8 | ptr [1]);
1118 ptr += 2;
1119 } else {
1120 len = ((b & 0x1f) << 24) |
1121 (ptr [1] << 16) |
1122 (ptr [2] << 8) |
1123 ptr [3];
1124 ptr += 4;
1125 }
1126 if (rptr)
1127 *rptr = (char*)ptr;
1128
1129 return len;
1130 }
1131
1132 /**
1133 * mono_metadata_decode_signed_value:
1134 * @ptr: pointer to decode from
1135 * @rptr: the new position of the pointer
1136 *
1137 * This routine decompresses 32-bit signed values
1138 * (not specified in the spec)
1139 *
1140 * Returns: the decoded value
1141 */
1142 gint32
1143 mono_metadata_decode_signed_value (const char *ptr, const char **rptr)
1144 {
1145 guint32 uval = mono_metadata_decode_value (ptr, rptr);
1146 gint32 ival = uval >> 1;
1147 if (!(uval & 1))
1148 return ival;
1149 /* ival is a truncated 2's complement negative number. */
1150 if (ival < 0x40)
1151 /* 6 bits = 7 bits for compressed representation (top bit is '0') - 1 sign bit */
1152 return ival - 0x40;
1153 if (ival < 0x2000)
1154 /* 13 bits = 14 bits for compressed representation (top bits are '10') - 1 sign bit */
1155 return ival - 0x2000;
1156 if (ival < 0x10000000)
1157 /* 28 bits = 29 bits for compressed representation (top bits are '110') - 1 sign bit */
1158 return ival - 0x10000000;
1159 g_assert (ival < 0x20000000);
1160 g_warning ("compressed signed value appears to use 29 bits for compressed representation: %x (raw: %8x)", ival, uval);
1161 return ival - 0x20000000;
1162 }
1163
1164 /*
1165 * Translates the given 1-based index into the Method, Field, Event, or Param tables
1166 * using the *Ptr tables in uncompressed metadata, if they are available.
1167 *
1168 * FIXME: The caller is not forced to call this function, which is error-prone, since
1169 * forgetting to call it would only show up as a bug on uncompressed metadata.
1170 */
1171 guint32
1172 mono_metadata_translate_token_index (MonoImage *image, int table, guint32 idx)
1173 {
1174 if (!image->uncompressed_metadata)
1175 return idx;
1176
1177 switch (table) {
1178 case MONO_TABLE_METHOD:
1179 if (image->tables [MONO_TABLE_METHOD_POINTER].rows)
1180 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_METHOD_POINTER], idx - 1, MONO_METHOD_POINTER_METHOD);
1181 else
1182 return idx;
1183 case MONO_TABLE_FIELD:
1184 if (image->tables [MONO_TABLE_FIELD_POINTER].rows)
1185 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_FIELD_POINTER], idx - 1, MONO_FIELD_POINTER_FIELD);
1186 else
1187 return idx;
1188 case MONO_TABLE_EVENT:
1189 if (image->tables [MONO_TABLE_EVENT_POINTER].rows)
1190 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_EVENT_POINTER], idx - 1, MONO_EVENT_POINTER_EVENT);
1191 else
1192 return idx;
1193 case MONO_TABLE_PROPERTY:
1194 if (image->tables [MONO_TABLE_PROPERTY_POINTER].rows)
1195 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PROPERTY_POINTER], idx - 1, MONO_PROPERTY_POINTER_PROPERTY);
1196 else
1197 return idx;
1198 case MONO_TABLE_PARAM:
1199 if (image->tables [MONO_TABLE_PARAM_POINTER].rows)
1200 return mono_metadata_decode_row_col (&image->tables [MONO_TABLE_PARAM_POINTER], idx - 1, MONO_PARAM_POINTER_PARAM);
1201 else
1202 return idx;
1203 default:
1204 return idx;
1205 }
1206 }
1207
1208 /**
1209 * mono_metadata_decode_table_row:
1210 *
1211 * Same as mono_metadata_decode_row, but takes an IMAGE+TABLE ID pair, and takes
1212 * uncompressed metadata into account, so it should be used to access the
1213 * Method, Field, Param and Event tables when the access is made from metadata, i.e.
1214 * IDX is retrieved from a metadata table, like MONO_TYPEDEF_FIELD_LIST.
1215 */
1216 void
1217 mono_metadata_decode_table_row (MonoImage *image, int table, int idx, guint32 *res, int res_size)
1218 {
1219 if (image->uncompressed_metadata)
1220 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1221
1222 mono_metadata_decode_row (&image->tables [table], idx, res, res_size);
1223 }
1224
1225 /**
1226 * mono_metadata_decode_table_row_col:
1227 *
1228 * Same as mono_metadata_decode_row_col, but takes an IMAGE+TABLE ID pair, and takes
1229 * uncompressed metadata into account, so it should be used to access the
1230 * Method, Field, Param and Event tables.
1231 */
1232 guint32 mono_metadata_decode_table_row_col (MonoImage *image, int table, int idx, guint col)
1233 {
1234 if (image->uncompressed_metadata)
1235 idx = mono_metadata_translate_token_index (image, table, idx + 1) - 1;
1236
1237 return mono_metadata_decode_row_col (&image->tables [table], idx, col);
1238 }
1239
1240 /*
1241 * mono_metadata_parse_typedef_or_ref:
1242 * @m: a metadata context.
1243 * @ptr: a pointer to an encoded TypedefOrRef in @m
1244 * @rptr: pointer updated to match the end of the decoded stream
1245 *
1246 * Returns: a token valid in the @m metadata decoded from
1247 * the compressed representation.
1248 */
1249 guint32
1250 mono_metadata_parse_typedef_or_ref (MonoImage *m, const char *ptr, const char **rptr)
1251 {
1252 guint32 token;
1253 token = mono_metadata_decode_value (ptr, &ptr);
1254 if (rptr)
1255 *rptr = ptr;
1256 return mono_metadata_token_from_dor (token);
1257 }
1258
1259 /*
1260 * mono_metadata_parse_custom_mod:
1261 * @m: a metadata context.
1262 * @dest: storage where the info about the custom modifier is stored (may be NULL)
1263 * @ptr: a pointer to (possibly) the start of a custom modifier list
1264 * @rptr: pointer updated to match the end of the decoded stream
1265 *
1266 * Checks if @ptr points to a type custom modifier compressed representation.
1267 *
1268 * Returns: #TRUE if a custom modifier was found, #FALSE if not.
1269 */
1270 int
1271 mono_metadata_parse_custom_mod (MonoImage *m, MonoCustomMod *dest, const char *ptr, const char **rptr)
1272 {
1273 MonoCustomMod local;
1274 if ((*ptr == MONO_TYPE_CMOD_OPT) || (*ptr == MONO_TYPE_CMOD_REQD)) {
1275 if (!dest)
1276 dest = &local;
1277 dest->required = *ptr == MONO_TYPE_CMOD_REQD ? 1 : 0;
1278 dest->token = mono_metadata_parse_typedef_or_ref (m, ptr + 1, rptr);
1279 return TRUE;
1280 }
1281 return FALSE;
1282 }
1283
1284 /*
1285 * mono_metadata_parse_array_full:
1286 * @m: a metadata context.
1287 * @ptr: a pointer to an encoded array description.
1288 * @rptr: pointer updated to match the end of the decoded stream
1289 *
1290 * Decodes the compressed array description found in the metadata @m at @ptr.
1291 *
1292 * Returns: a #MonoArrayType structure describing the array type
1293 * and dimensions. Memory is allocated from the image mempool.
1294 *
1295 * LOCKING: Acquires the loader lock
1296 */
1297 MonoArrayType *
1298 mono_metadata_parse_array_full (MonoImage *m, MonoGenericContainer *container,
1299 const char *ptr, const char **rptr)
1300 {
1301 int i;
1302 MonoArrayType *array;
1303 MonoType *etype;
1304
1305 array = mono_image_alloc0_lock (m, sizeof (MonoArrayType));
1306 etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
1307 if (!etype)
1308 return NULL;
1309 array->eklass = mono_class_from_mono_type (etype);
1310 array->rank = mono_metadata_decode_value (ptr, &ptr);
1311
1312 array->numsizes = mono_metadata_decode_value (ptr, &ptr);
1313 if (array->numsizes)
1314 array->sizes = g_new0 (int, array->numsizes);
1315 for (i = 0; i < array->numsizes; ++i)
1316 array->sizes [i] = mono_metadata_decode_value (ptr, &ptr);
1317
1318 array->numlobounds = mono_metadata_decode_value (ptr, &ptr);
1319 if (array->numlobounds)
1320 array->lobounds = g_new0 (int, array->numlobounds);
1321 for (i = 0; i < array->numlobounds; ++i)
1322 array->lobounds [i] = mono_metadata_decode_signed_value (ptr, &ptr);
1323
1324 if (rptr)
1325 *rptr = ptr;
1326 return array;
1327 }
1328
1329 MonoArrayType *
1330 mono_metadata_parse_array (MonoImage *m, const char *ptr, const char **rptr)
1331 {
1332 return mono_metadata_parse_array_full (m, NULL, ptr, rptr);
1333 }
1334
1335 /*
1336 * mono_metadata_free_array:
1337 * @array: array description
1338 *
1339 * Frees the array description returned from mono_metadata_parse_array().
1340 */
1341 void
1342 mono_metadata_free_array (MonoArrayType *array)
1343 {
1344 g_free (array->sizes);
1345 g_free (array->lobounds);
1346 g_free (array);
1347 }
1348
1349 /*
1350 * need to add common field and param attributes combinations:
1351 * [out] param
1352 * public static
1353 * public static literal
1354 * private
1355 * private static
1356 * private static literal
1357 */
1358 static const MonoType
1359 builtin_types[] = {
1360 /* data, attrs, type, nmods, byref, pinned */
1361 {{NULL}, 0, MONO_TYPE_VOID, 0, 0, 0},
1362 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 0, 0},
1363 {{NULL}, 0, MONO_TYPE_BOOLEAN, 0, 1, 0},
1364 {{NULL}, 0, MONO_TYPE_CHAR, 0, 0, 0},
1365 {{NULL}, 0, MONO_TYPE_CHAR, 0, 1, 0},
1366 {{NULL}, 0, MONO_TYPE_I1, 0, 0, 0},
1367 {{NULL}, 0, MONO_TYPE_I1, 0, 1, 0},
1368 {{NULL}, 0, MONO_TYPE_U1, 0, 0, 0},
1369 {{NULL}, 0, MONO_TYPE_U1, 0, 1, 0},
1370 {{NULL}, 0, MONO_TYPE_I2, 0, 0, 0},
1371 {{NULL}, 0, MONO_TYPE_I2, 0, 1, 0},
1372 {{NULL}, 0, MONO_TYPE_U2, 0, 0, 0},
1373 {{NULL}, 0, MONO_TYPE_U2, 0, 1, 0},
1374 {{NULL}, 0, MONO_TYPE_I4, 0, 0, 0},
1375 {{NULL}, 0, MONO_TYPE_I4, 0, 1, 0},
1376 {{NULL}, 0, MONO_TYPE_U4, 0, 0, 0},
1377 {{NULL}, 0, MONO_TYPE_U4, 0, 1, 0},
1378 {{NULL}, 0, MONO_TYPE_I8, 0, 0, 0},
1379 {{NULL}, 0, MONO_TYPE_I8, 0, 1, 0},
1380 {{NULL}, 0, MONO_TYPE_U8, 0, 0, 0},
1381 {{NULL}, 0, MONO_TYPE_U8, 0, 1, 0},
1382 {{NULL}, 0, MONO_TYPE_R4, 0, 0, 0},
1383 {{NULL}, 0, MONO_TYPE_R4, 0, 1, 0},
1384 {{NULL}, 0, MONO_TYPE_R8, 0, 0, 0},
1385 {{NULL}, 0, MONO_TYPE_R8, 0, 1, 0},
1386 {{NULL}, 0, MONO_TYPE_STRING, 0, 0, 0},
1387 {{NULL}, 0, MONO_TYPE_STRING, 0, 1, 0},
1388 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 0, 0},
1389 {{NULL}, 0, MONO_TYPE_OBJECT, 0, 1, 0},
1390 {{NULL}, 0, MONO_TYPE_TYPEDBYREF, 0, 0, 0},
1391 {{NULL}, 0, MONO_TYPE_I, 0, 0, 0},
1392 {{NULL}, 0, MONO_TYPE_I, 0, 1, 0},
1393 {{NULL}, 0, MONO_TYPE_U, 0, 0, 0},
1394 {{NULL}, 0, MONO_TYPE_U, 0, 1, 0},
1395 };
1396
1397 #define NBUILTIN_TYPES() (sizeof (builtin_types) / sizeof (builtin_types [0]))
1398
1399 static GHashTable *type_cache = NULL;
1400 static GHashTable *generic_inst_cache = NULL;
1401 static GHashTable *generic_class_cache = NULL;
1402 static int next_generic_inst_id = 0;
1403
1404 /*
1405 * Protected by the loader lock.
1406 * It has a MonoMethodInflated* as key and value.
1407 * The key lookup will just access the declaring and context fields
1408 */
1409 static GHashTable *generic_method_cache = NULL;
1410
1411 /*
1412 * Protected by the loader lock.
1413 * It has a MonoInflatedMethodSignature* as key and value.
1414 */
1415 static GHashTable *generic_signature_cache = NULL;
1416
1417 static guint mono_generic_class_hash (gconstpointer data);
1418
1419 /*
1420 * MonoTypes with modifies are never cached, so we never check or use that field.
1421 */
1422 static guint
1423 mono_type_hash (gconstpointer data)
1424 {
1425 const MonoType *type = (const MonoType *) data;
1426 if (type->type == MONO_TYPE_GENERICINST)
1427 return mono_generic_class_hash (type->data.generic_class);
1428 else
1429 return type->type | (type->byref << 8) | (type->attrs << 9);
1430 }
1431
1432 static gint
1433 mono_type_equal (gconstpointer ka, gconstpointer kb)
1434 {
1435 const MonoType *a = (const MonoType *) ka;
1436 const MonoType *b = (const MonoType *) kb;
1437
1438 if (a->type != b->type || a->byref != b->byref || a->attrs != b->attrs || a->pinned != b->pinned)
1439 return 0;
1440 /* need other checks */
1441 return 1;
1442 }
1443
1444 guint
1445 mono_metadata_generic_inst_hash (gconstpointer data)
1446 {
1447 const MonoGenericInst *ginst = (const MonoGenericInst *) data;
1448 guint hash = 0;
1449 int i;
1450
1451 for (i = 0; i < ginst->type_argc; ++i) {
1452 hash *= 13;
1453 hash += mono_metadata_type_hash (ginst->type_argv [i]);
1454 }
1455
1456 return hash ^ (ginst->is_open << 8);
1457 }
1458
1459 static gboolean
1460 mono_generic_inst_equal_full (const MonoGenericInst *a, const MonoGenericInst *b, gboolean signature_only)
1461 {
1462 int i;
1463
1464 if (a->id && b->id) {
1465 if (a->id == b->id)
1466 return TRUE;
1467 if (!signature_only)
1468 return FALSE;
1469 }
1470
1471 if (a->is_open != b->is_open || a->type_argc != b->type_argc)
1472 return FALSE;
1473 for (i = 0; i < a->type_argc; ++i) {
1474 if (!do_mono_metadata_type_equal (a->type_argv [i], b->type_argv [i], signature_only))
1475 return FALSE;
1476 }
1477 return TRUE;
1478 }
1479
1480 gboolean
1481 mono_metadata_generic_inst_equal (gconstpointer ka, gconstpointer kb)
1482 {
1483 const MonoGenericInst *a = (const MonoGenericInst *) ka;
1484 const MonoGenericInst *b = (const MonoGenericInst *) kb;
1485
1486 return mono_generic_inst_equal_full (a, b, FALSE);
1487 }
1488
1489 static guint
1490 mono_generic_class_hash (gconstpointer data)
1491 {
1492 const MonoGenericClass *gclass = (const MonoGenericClass *) data;
1493 guint hash = mono_metadata_type_hash (&gclass->container_class->byval_arg);
1494
1495 hash *= 13;
1496 hash += gclass->is_tb_open;
1497 hash += mono_metadata_generic_context_hash (&gclass->context);
1498
1499 return hash;
1500 }
1501
1502 static gboolean
1503 mono_generic_class_equal (gconstpointer ka, gconstpointer kb)
1504 {
1505 const MonoGenericClass *a = (const MonoGenericClass *) ka;
1506 const MonoGenericClass *b = (const MonoGenericClass *) kb;
1507
1508 return _mono_metadata_generic_class_equal (a, b, FALSE);
1509 }
1510
1511 /**
1512 * mono_metadata_init:
1513 *
1514 * Initialize the global variables of this module.
1515 * This is a Mono runtime internal function.
1516 */
1517 void
1518 mono_metadata_init (void)
1519 {
1520 int i;
1521
1522 type_cache = g_hash_table_new (mono_type_hash, mono_type_equal);
1523 generic_inst_cache = g_hash_table_new_full (mono_metadata_generic_inst_hash, mono_metadata_generic_inst_equal, NULL, (GDestroyNotify)free_generic_inst);
1524 generic_class_cache = g_hash_table_new_full (mono_generic_class_hash, mono_generic_class_equal, NULL, (GDestroyNotify)free_generic_class);
1525
1526 for (i = 0; i < NBUILTIN_TYPES (); ++i)
1527 g_hash_table_insert (type_cache, (gpointer) &builtin_types [i], (gpointer) &builtin_types [i]);
1528 }
1529
1530 /**
1531 * mono_metadata_cleanup:
1532 *
1533 * Free all resources used by this module.
1534 * This is a Mono runtime internal function.
1535 */
1536 void
1537 mono_metadata_cleanup (void)
1538 {
1539 g_hash_table_destroy (type_cache);
1540 g_hash_table_destroy (generic_inst_cache);
1541 g_hash_table_destroy (generic_class_cache);
1542 if (generic_method_cache)
1543 g_hash_table_destroy (generic_method_cache);
1544 if (generic_signature_cache)
1545 g_hash_table_destroy (generic_signature_cache);
1546 type_cache = NULL;
1547 generic_inst_cache = NULL;
1548 generic_class_cache = NULL;
1549 generic_method_cache = NULL;
1550 generic_signature_cache = NULL;
1551 }
1552
1553 /**
1554 * mono_metadata_parse_type:
1555 * @m: metadata context
1556 * @mode: king of type that may be found at @ptr
1557 * @opt_attrs: optional attributes to store in the returned type
1558 * @ptr: pointer to the type representation
1559 * @rptr: pointer updated to match the end of the decoded stream
1560 *
1561 * Decode a compressed type description found at @ptr in @m.
1562 * @mode can be one of MONO_PARSE_MOD_TYPE, MONO_PARSE_PARAM, MONO_PARSE_RET,
1563 * MONO_PARSE_FIELD, MONO_PARSE_LOCAL, MONO_PARSE_TYPE.
1564 * This function can be used to decode type descriptions in method signatures,
1565 * field signatures, locals signatures etc.
1566 *
1567 * To parse a generic type, `generic_container' points to the current class'es
1568 * (the `generic_container' field in the MonoClass) or the current generic method's
1569 * (the `generic_container' field in the MonoMethodNormal) generic container.
1570 * When we encounter any MONO_TYPE_VAR or MONO_TYPE_MVAR's, they're looked up in
1571 * this MonoGenericContainer.
1572 * This is a Mono runtime internal function.
1573 *
1574 * LOCKING: Acquires the loader lock.
1575 *
1576 * Returns: a #MonoType structure representing the decoded type.
1577 */
1578 MonoType*
1579 mono_metadata_parse_type_full (MonoImage *m, MonoGenericContainer *container, MonoParseTypeMode mode,
1580 short opt_attrs, const char *ptr, const char **rptr)
1581 {
1582 MonoType *type, *cached;
1583 MonoType stype;
1584 gboolean byref = FALSE;
1585 gboolean pinned = FALSE;
1586 const char *tmp_ptr;
1587 int count = 0;
1588 gboolean found;
1589
1590 /*
1591 * According to the spec, custom modifiers should come before the byref
1592 * flag, but the IL produced by ilasm from the following signature:
1593 * object modopt(...) &
1594 * starts with a byref flag, followed by the modifiers. (bug #49802)
1595 * Also, this type seems to be different from 'object & modopt(...)'. Maybe
1596 * it would be better to treat byref as real type constructor instead of
1597 * a modifier...
1598 * Also, pinned should come before anything else, but some MSV++ produced
1599 * assemblies violate this (#bug 61990).
1600 */
1601
1602 /* Count the modifiers first */
1603 tmp_ptr = ptr;
1604 found = TRUE;
1605 while (found) {
1606 switch (*tmp_ptr) {
1607 case MONO_TYPE_PINNED:
1608 case MONO_TYPE_BYREF:
1609 ++tmp_ptr;
1610 break;
1611 case MONO_TYPE_CMOD_REQD:
1612 case MONO_TYPE_CMOD_OPT:
1613 count ++;
1614 mono_metadata_parse_custom_mod (m, NULL, tmp_ptr, &tmp_ptr);
1615 break;
1616 default:
1617 found = FALSE;
1618 }
1619 }
1620
1621 if (count) {
1622 type = mono_image_alloc0_lock (m, sizeof (MonoType) + ((gint32)count - MONO_ZERO_LEN_ARRAY) * sizeof (MonoCustomMod));
1623 type->num_mods = count;
1624 if (count > 64)
1625 g_warning ("got more than 64 modifiers in type");
1626 } else {
1627 type = &stype;
1628 memset (type, 0, sizeof (MonoType));
1629 }
1630
1631 /* Parse pinned, byref and custom modifiers */
1632 found = TRUE;
1633 count = 0;
1634 while (found) {
1635 switch (*ptr) {
1636 case MONO_TYPE_PINNED:
1637 pinned = TRUE;
1638 ++ptr;
1639 break;
1640 case MONO_TYPE_BYREF:
1641 byref = TRUE;
1642 ++ptr;
1643 break;
1644 case MONO_TYPE_CMOD_REQD:
1645 case MONO_TYPE_CMOD_OPT:
1646 mono_metadata_parse_custom_mod (m, &(type->modifiers [count]), ptr, &ptr);
1647 count ++;
1648 break;
1649 default:
1650 found = FALSE;
1651 }
1652 }
1653
1654 type->attrs = opt_attrs;
1655 type->byref = byref;
1656 type->pinned = pinned ? 1 : 0;
1657
1658 if (!do_mono_metadata_parse_type (type, m, container, ptr, &ptr)) {
1659 return NULL;
1660 }
1661
1662 if (rptr)
1663 *rptr = ptr;
1664
1665 if (!type->num_mods) {
1666 /* no need to free type here, because it is on the stack */
1667 if ((type->type == MONO_TYPE_CLASS || type->type == MONO_TYPE_VALUETYPE) && !type->pinned && !type->attrs) {
1668 MonoType *ret = type->byref ? &type->data.klass->this_arg : &type->data.klass->byval_arg;
1669
1670 /* Consider the case:
1671
1672 class Foo<T> { class Bar {} }
1673 class Test : Foo<Test>.Bar {}
1674
1675 When Foo<Test> is being expanded, 'Test' isn't yet initialized. It's actually in
1676 a really pristine state: it doesn't even know whether 'Test' is a reference or a value type.
1677
1678 We ensure that the MonoClass is in a state that we can canonicalize to:
1679
1680 klass->byval_arg.data.klass == klass
1681 klass->this_arg.data.klass == klass
1682
1683 If we can't canonicalize 'type', it doesn't matter, since later users of 'type' will do it.
1684
1685 LOCKING: even though we don't explicitly hold a lock, in the problematic case 'ret' is a field
1686 of a MonoClass which currently holds the loader lock. 'type' is local.
1687 */
1688 if (ret->data.klass == type->data.klass) {
1689 return ret;
1690 }
1691 }
1692 /* No need to use locking since nobody is modifying the hash table */
1693 if ((cached = g_hash_table_lookup (type_cache, type))) {
1694 return cached;
1695 }
1696 }
1697
1698 /* printf ("%x %x %c %s\n", type->attrs, type->num_mods, type->pinned ? 'p' : ' ', mono_type_full_name (type)); */
1699
1700 if (type == &stype) {
1701 type = mono_image_alloc_lock (m, sizeof (MonoType));
1702 memcpy (type, &stype, sizeof (MonoType));
1703 }
1704 return type;
1705 }
1706
1707 /*
1708 * LOCKING: Acquires the loader lock.
1709 */
1710 MonoType*
1711 mono_metadata_parse_type (MonoImage *m, MonoParseTypeMode mode, short opt_attrs,
1712 const char *ptr, const char **rptr)
1713 {
1714 return mono_metadata_parse_type_full (m, NULL, mode, opt_attrs, ptr, rptr);
1715 }
1716
1717 /*
1718 * mono_metadata_get_param_attrs:
1719 *
1720 * Return the parameter attributes for the method whose MethodDef index is DEF. The
1721 * returned memory needs to be freed by the caller. If all the param attributes are
1722 * 0, then NULL is returned.
1723 */
1724 int*
1725 mono_metadata_get_param_attrs (MonoImage *m, int def)
1726 {
1727 MonoTableInfo *paramt = &m->tables [MONO_TABLE_PARAM];
1728 MonoTableInfo *methodt = &m->tables [MONO_TABLE_METHOD];
1729 guint32 cols [MONO_PARAM_SIZE];
1730 guint lastp, i, param_index = mono_metadata_decode_row_col (&m->tables [MONO_TABLE_METHOD], def - 1, MONO_METHOD_PARAMLIST);
1731 int *pattrs = NULL;
1732
1733 if (def < methodt->rows)
1734 lastp = mono_metadata_decode_row_col (&m->tables [MONO_TABLE_METHOD], def, MONO_METHOD_PARAMLIST);
1735 else
1736 lastp = paramt->rows + 1;
1737
1738 for (i = param_index; i < lastp; ++i) {
1739 mono_metadata_decode_row (&m->tables [MONO_TABLE_PARAM], i - 1, cols, MONO_PARAM_SIZE);
1740 if (cols [MONO_PARAM_FLAGS]) {
1741 if (!pattrs)
1742 pattrs = g_new0 (int, 1 + (lastp - param_index));
1743 pattrs [cols [MONO_PARAM_SEQUENCE]] = cols [MONO_PARAM_FLAGS];
1744 }
1745 }
1746
1747 return pattrs;
1748 }
1749
1750 /*
1751 * mono_metadata_parse_signature_full:
1752 * @image: metadata context
1753 * @generic_container: generic container
1754 * @toke: metadata token
1755 *
1756 * Decode a method signature stored in the STANDALONESIG table
1757 *
1758 * LOCKING: Assumes the loader lock is held.
1759 *
1760 * Returns: a MonoMethodSignature describing the signature.
1761 */
1762 MonoMethodSignature*
1763 mono_metadata_parse_signature_full (MonoImage *image, MonoGenericContainer *generic_container, guint32 token)
1764 {
1765 MonoTableInfo *tables = image->tables;
1766 guint32 idx = mono_metadata_token_index (token);
1767 guint32 sig;
1768 const char *ptr;
1769
1770 if (image->dynamic)
1771 return mono_lookup_dynamic_token (image, token, NULL);
1772
1773 g_assert (mono_metadata_token_table(token) == MONO_TABLE_STANDALONESIG);
1774
1775 sig = mono_metadata_decode_row_col (&tables [MONO_TABLE_STANDALONESIG], idx - 1, 0);
1776
1777 ptr = mono_metadata_blob_heap (image, sig);
1778 mono_metadata_decode_blob_size (ptr, &ptr);
1779
1780 return mono_metadata_parse_method_signature_full (image, generic_container, 0, ptr, NULL);
1781 }
1782
1783 /*
1784 * mono_metadata_parse_signature:
1785 * @image: metadata context
1786 * @toke: metadata token
1787 *
1788 * Decode a method signature stored in the STANDALONESIG table
1789 *
1790 * Returns: a MonoMethodSignature describing the signature.
1791 */
1792 MonoMethodSignature*
1793 mono_metadata_parse_signature (MonoImage *image, guint32 token)
1794 {
1795 return mono_metadata_parse_signature_full (image, NULL, token);
1796 }
1797
1798 /*
1799 * mono_metadata_signature_alloc:
1800 * @image: metadata context
1801 * @nparmas: number of parameters in the signature
1802 *
1803 * Allocate a MonoMethodSignature structure with the specified number of params.
1804 * The return type and the params types need to be filled later.
1805 * This is a Mono runtime internal function.
1806 *
1807 * LOCKING: Assumes the loader lock is held.
1808 *
1809 * Returns: the new MonoMethodSignature structure.
1810 */
1811 MonoMethodSignature*
1812 mono_metadata_signature_alloc (MonoImage *m, guint32 nparams)
1813 {
1814 MonoMethodSignature *sig;
1815
1816 sig = mono_image_alloc0_lock (m, sizeof (MonoMethodSignature) + ((gint32)nparams - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType*));
1817 sig->param_count = nparams;
1818 sig->sentinelpos = -1;
1819
1820 return sig;
1821 }
1822
1823 MonoMethodSignature*
1824 mono_metadata_signature_dup_full (MonoMemPool *mp, MonoMethodSignature *sig)
1825 {
1826 int sigsize;
1827
1828 sigsize = sizeof (MonoMethodSignature) + (sig->param_count - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType *);
1829
1830 if (mp) {
1831 MonoMethodSignature *ret;
1832 mono_loader_lock ();
1833 ret = mono_mempool_alloc (mp, sigsize);
1834 mono_loader_unlock ();
1835
1836 memcpy (ret, sig, sigsize);
1837 return ret;
1838 } else {
1839 return g_memdup (sig, sigsize);
1840 }
1841 }
1842
1843 /*
1844 * mono_metadata_signature_dup:
1845 * @sig: method signature
1846 *
1847 * Duplicate an existing MonoMethodSignature so it can be modified.
1848 * This is a Mono runtime internal function.
1849 *
1850 * Returns: the new MonoMethodSignature structure.
1851 */
1852 MonoMethodSignature*
1853 mono_metadata_signature_dup (MonoMethodSignature *sig)
1854 {
1855 return mono_metadata_signature_dup_full (NULL, sig);
1856 }
1857
1858 /*
1859 * mono_metadata_parse_method_signature:
1860 * @m: metadata context
1861 * @generic_container: generics container
1862 * @def: the MethodDef index or 0 for Ref signatures.
1863 * @ptr: pointer to the signature metadata representation
1864 * @rptr: pointer updated to match the end of the decoded stream
1865 *
1866 * Decode a method signature stored at @ptr.
1867 * This is a Mono runtime internal function.
1868 *
1869 * LOCKING: Assumes the loader lock is held.
1870 *
1871 * Returns: a MonoMethodSignature describing the signature.
1872 */
1873 MonoMethodSignature *
1874 mono_metadata_parse_method_signature_full (MonoImage *m, MonoGenericContainer *container,
1875 int def, const char *ptr, const char **rptr)
1876 {
1877 MonoMethodSignature *method;
1878 int i, *pattrs = NULL;
1879 guint32 hasthis = 0, explicit_this = 0, call_convention, param_count;
1880 guint32 gen_param_count = 0;
1881 gboolean is_open = FALSE;
1882
1883 if (*ptr & 0x10)
1884 gen_param_count = 1;
1885 if (*ptr & 0x20)
1886 hasthis = 1;
1887 if (*ptr & 0x40)
1888 explicit_this = 1;
1889 call_convention = *ptr & 0x0F;
1890 ptr++;
1891 if (gen_param_count)
1892 gen_param_count = mono_metadata_decode_value (ptr, &ptr);
1893 param_count = mono_metadata_decode_value (ptr, &ptr);
1894
1895 if (def)
1896 pattrs = mono_metadata_get_param_attrs (m, def);
1897 method = mono_metadata_signature_alloc (m, param_count);
1898 method->hasthis = hasthis;
1899 method->explicit_this = explicit_this;
1900 method->call_convention = call_convention;
1901 method->generic_param_count = gen_param_count;
1902
1903 if (call_convention != 0xa) {
1904 method->ret = mono_metadata_parse_type_full (m, container, MONO_PARSE_RET, pattrs ? pattrs [0] : 0, ptr, &ptr);
1905 if (!method->ret) {
1906 mono_metadata_free_method_signature (method);
1907 g_free (pattrs);
1908 return NULL;
1909 }
1910 is_open = mono_class_is_open_constructed_type (method->ret);
1911 }
1912
1913 for (i = 0; i < method->param_count; ++i) {
1914 if (*ptr == MONO_TYPE_SENTINEL) {
1915 if (method->call_convention != MONO_CALL_VARARG || def)
1916 g_error ("found sentinel for methoddef or no vararg method");
1917 if (method->sentinelpos >= 0)
1918 g_error ("found sentinel twice in the same signature");
1919 method->sentinelpos = i;
1920 ptr++;
1921 }
1922 method->params [i] = mono_metadata_parse_type_full (m, container, MONO_PARSE_PARAM, pattrs ? pattrs [i+1] : 0, ptr, &ptr);
1923 if (!method->params [i]) {
1924 mono_metadata_free_method_signature (method);
1925 g_free (pattrs);
1926 return NULL;
1927 }
1928 if (!is_open)
1929 is_open = mono_class_is_open_constructed_type (method->params [i]);
1930 }
1931
1932 /* The sentinel could be missing if the caller does not pass any additional arguments */
1933 if (!def && method->call_convention == MONO_CALL_VARARG && method->sentinelpos < 0)
1934 method->sentinelpos = method->param_count;
1935
1936 method->has_type_parameters = is_open;
1937
1938 if (def && (method->call_convention == MONO_CALL_VARARG))
1939 method->sentinelpos = method->param_count;
1940
1941 g_free (pattrs);
1942
1943 if (rptr)
1944 *rptr = ptr;
1945 /*
1946 * Add signature to a cache and increase ref count...
1947 */
1948
1949 return method;
1950 }
1951
1952 /*
1953 * mono_metadata_parse_method_signature:
1954 * @m: metadata context
1955 * @def: the MethodDef index or 0 for Ref signatures.
1956 * @ptr: pointer to the signature metadata representation
1957 * @rptr: pointer updated to match the end of the decoded stream
1958 *
1959 * Decode a method signature stored at @ptr.
1960 * This is a Mono runtime internal function.
1961 *
1962 * LOCKING: Assumes the loader lock is held.
1963 *
1964 * Returns: a MonoMethodSignature describing the signature.
1965 */
1966 MonoMethodSignature *
1967 mono_metadata_parse_method_signature (MonoImage *m, int def, const char *ptr, const char **rptr)
1968 {
1969 return mono_metadata_parse_method_signature_full (m, NULL, def, ptr, rptr);
1970 }
1971
1972 /*
1973 * mono_metadata_free_method_signature:
1974 * @sig: signature to destroy
1975 *
1976 * Free the memory allocated in the signature @sig.
1977 * This method needs to be robust and work also on partially-built
1978 * signatures, so it does extra checks.
1979 */
1980 void
1981 mono_metadata_free_method_signature (MonoMethodSignature *sig)
1982 {
1983 /* Everything is allocated from mempools */
1984 /*
1985 int i;
1986 if (sig->ret)
1987 mono_metadata_free_type (sig->ret);
1988 for (i = 0; i < sig->param_count; ++i) {
1989 if (sig->params [i])
1990 mono_metadata_free_type (sig->params [i]);
1991 }
1992 */
1993 }
1994
1995 void
1996 mono_metadata_free_inflated_signature (MonoMethodSignature *sig)
1997 {
1998 int i;
1999
2000 /* Allocated in inflate_generic_signature () */
2001 if (sig->ret)
2002 mono_metadata_free_type (sig->ret);
2003 for (i = 0; i < sig->param_count; ++i) {
2004 if (sig->params [i])
2005 mono_metadata_free_type (sig->params [i]);
2006 }
2007 g_free (sig);
2008 }
2009
2010 static gboolean
2011 inflated_method_equal (gconstpointer a, gconstpointer b)
2012 {
2013 const MonoMethodInflated *ma = a;
2014 const MonoMethodInflated *mb = b;
2015 if (ma->declaring != mb->declaring)
2016 return FALSE;
2017 if (ma->is_mb_open != mb->is_mb_open)
2018 return FALSE;
2019 return mono_metadata_generic_context_equal (&ma->context, &mb->context);
2020 }
2021
2022 static guint
2023 inflated_method_hash (gconstpointer a)
2024 {
2025 const MonoMethodInflated *ma = a;
2026 return (mono_metadata_generic_context_hash (&ma->context) ^ mono_aligned_addr_hash (ma->declaring)) + ma->is_mb_open;
2027 }
2028
2029 static gboolean
2030 inflated_signature_equal (gconstpointer a, gconstpointer b)
2031 {
2032 const MonoInflatedMethodSignature *sig1 = a;
2033 const MonoInflatedMethodSignature *sig2 = b;
2034
2035 /* sig->sig is assumed to be canonized */
2036 if (sig1->sig != sig2->sig)
2037 return FALSE;
2038 /* The generic instances are canonized */
2039 return mono_metadata_generic_context_equal (&sig1->context, &sig2->context);
2040 }
2041
2042 static guint
2043 inflated_signature_hash (gconstpointer a)
2044 {
2045 const MonoInflatedMethodSignature *sig = a;
2046
2047 /* sig->sig is assumed to be canonized */
2048 return mono_metadata_generic_context_hash (&sig->context) ^ mono_aligned_addr_hash (sig->sig);
2049 }
2050
2051 /*static void
2052 dump_ginst (MonoGenericInst *ginst)
2053 {
2054 int i;
2055 char *name;
2056
2057 g_print ("Ginst: <");
2058 for (i = 0; i < ginst->type_argc; ++i) {
2059 if (i != 0)
2060 g_print (", ");
2061 name = mono_type_get_name (ginst->type_argv [i]);
2062 g_print ("%s", name);
2063 g_free (name);
2064 }
2065 g_print (">");
2066 }*/
2067
2068 static gboolean type_in_image (MonoType *type, MonoImage *image);
2069
2070 static gboolean
2071 signature_in_image (MonoMethodSignature *sig, MonoImage *image)
2072 {
2073 gpointer iter = NULL;
2074 MonoType *p;
2075
2076 while ((p = mono_signature_get_params (sig, &iter)) != NULL)
2077 if (type_in_image (p, image))
2078 return TRUE;
2079
2080 return type_in_image (mono_signature_get_return_type (sig), image);
2081 }
2082
2083 static gboolean
2084 ginst_in_image (MonoGenericInst *ginst, MonoImage *image)
2085 {
2086 int i;
2087
2088 for (i = 0; i < ginst->type_argc; ++i) {
2089 if (type_in_image (ginst->type_argv [i], image))
2090 return TRUE;
2091 }
2092
2093 return FALSE;
2094 }
2095
2096 static gboolean
2097 gclass_in_image (MonoGenericClass *gclass, MonoImage *image)
2098 {
2099 return gclass->container_class->image == image ||
2100 ginst_in_image (gclass->context.class_inst, image);
2101 }
2102
2103 static gboolean
2104 type_in_image (MonoType *type, MonoImage *image)
2105 {
2106 retry:
2107 switch (type->type) {
2108 case MONO_TYPE_GENERICINST:
2109 return gclass_in_image (type->data.generic_class, image);
2110 case MONO_TYPE_PTR:
2111 type = type->data.type;
2112 goto retry;
2113 case MONO_TYPE_SZARRAY:
2114 type = &type->data.klass->byval_arg;
2115 goto retry;
2116 case MONO_TYPE_ARRAY:
2117 type = &type->data.array->eklass->byval_arg;
2118 goto retry;
2119 case MONO_TYPE_FNPTR:
2120 return signature_in_image (type->data.method, image);
2121 case MONO_TYPE_VAR:
2122 if (type->data.generic_param->owner) {
2123 g_assert (!type->data.generic_param->owner->is_method);
2124 return type->data.generic_param->owner->owner.klass->image == image;
2125 } else {
2126 return type->data.generic_param->image == image;
2127 }
2128 case MONO_TYPE_MVAR:
2129 if (type->data.generic_param->owner) {
2130 g_assert (type->data.generic_param->owner->is_method);
2131 if (!type->data.generic_param->owner->owner.method)
2132 /* RefEmit created generic param whose method is not finished */
2133 return FALSE;
2134 return type->data.generic_param->owner->owner.method->klass->image == image;
2135 } else {
2136 return type->data.generic_param->image == image;
2137 }
2138 default:
2139 /* At this point, we should've avoided all potential allocations in mono_class_from_mono_type () */
2140 return image == mono_class_from_mono_type (type)->image;
2141 }
2142 }
2143
2144 typedef struct {
2145 MonoImage *image;
2146 GSList *list;
2147 } CleanForImageUserData;
2148
2149 static gboolean
2150 steal_gclass_in_image (gpointer key, gpointer value, gpointer data)
2151 {
2152 MonoGenericClass *gclass = key;
2153 CleanForImageUserData *user_data = data;
2154
2155 if (!gclass_in_image (gclass, user_data->image))
2156 return FALSE;
2157
2158 user_data->list = g_slist_prepend (user_data->list, gclass);
2159 return TRUE;
2160 }
2161
2162 static gboolean
2163 steal_ginst_in_image (gpointer key, gpointer value, gpointer data)
2164 {
2165 MonoGenericInst *ginst = key;
2166 CleanForImageUserData *user_data = data;
2167
2168 if (!ginst_in_image (ginst, user_data->image))
2169 return FALSE;
2170
2171 user_data->list = g_slist_prepend (user_data->list, ginst);
2172 return TRUE;
2173 }
2174
2175 static gboolean
2176 inflated_method_in_image (gpointer key, gpointer value, gpointer data)
2177 {
2178 MonoImage *image = data;
2179 MonoMethodInflated *method = key;
2180
2181 // FIXME:
2182 // https://bugzilla.novell.com/show_bug.cgi?id=458168
2183 return method->declaring->klass->image == image ||
2184 (method->context.class_inst && ginst_in_image (method->context.class_inst, image)) ||
2185 (method->context.method_inst && ginst_in_image (method->context.method_inst, image)) || signature_in_image (mono_method_signature ((MonoMethod*)method), image);
2186 }
2187
2188 static gboolean
2189 inflated_signature_in_image (gpointer key, gpointer value, gpointer data)
2190 {
2191 MonoImage *image = data;
2192 MonoInflatedMethodSignature *sig = key;
2193
2194 return signature_in_image (sig->sig, image) ||
2195 (sig->context.class_inst && ginst_in_image (sig->context.class_inst, image)) ||
2196 (sig->context.method_inst && ginst_in_image (sig->context.method_inst, image));
2197 }
2198
2199 void
2200 mono_metadata_clean_for_image (MonoImage *image)
2201 {
2202 CleanForImageUserData ginst_data, gclass_data;
2203 GSList *l;
2204
2205 /* The data structures could reference each other so we delete them in two phases */
2206 ginst_data.image = gclass_data.image = image;
2207 ginst_data.list = gclass_data.list = NULL;
2208
2209 mono_loader_lock ();
2210 /* Collect the items to delete and remove them from the hash table */
2211 g_hash_table_foreach_steal (generic_inst_cache, steal_ginst_in_image, &ginst_data);
2212 g_hash_table_foreach_steal (generic_class_cache, steal_gclass_in_image, &gclass_data);
2213 if (generic_method_cache)
2214 g_hash_table_foreach_remove (generic_method_cache, inflated_method_in_image, image);
2215 if (generic_signature_cache)
2216 g_hash_table_foreach_remove (generic_signature_cache, inflated_signature_in_image, image);
2217 /* Delete the removed items */
2218 for (l = ginst_data.list; l; l = l->next)
2219 free_generic_inst (l->data);
2220 for (l = gclass_data.list; l; l = l->next)
2221 free_generic_class (l->data);
2222 g_slist_free (ginst_data.list);
2223 g_slist_free (gclass_data.list);
2224 mono_class_unregister_image_generic_subclasses (image);
2225 mono_loader_unlock ();
2226 }
2227
2228 static void
2229 free_inflated_method (MonoMethodInflated *imethod)
2230 {
2231 int i;
2232 MonoMethod *method = (MonoMethod*)imethod;
2233
2234 if (method->signature)
2235 mono_metadata_free_inflated_signature (method->signature);
2236
2237 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))) {
2238 MonoMethodNormal* mn = (MonoMethodNormal*) method;
2239 MonoMethodHeader *header = mn->header;
2240
2241 if (header) {
2242 /* Allocated in inflate_generic_header () */
2243 for (i = 0; i < header->num_locals; ++i)
2244 mono_metadata_free_type (header->locals [i]);
2245 g_free (header->clauses);
2246 g_free (header);
2247 }
2248 }
2249
2250 g_free (method);
2251 }
2252
2253 static void
2254 free_generic_inst (MonoGenericInst *ginst)
2255 {
2256 int i;
2257
2258 for (i = 0; i < ginst->type_argc; ++i)
2259 mono_metadata_free_type (ginst->type_argv [i]);
2260 g_free (ginst->type_argv);
2261 g_free (ginst);
2262 }
2263
2264
2265 static void
2266 free_generic_class (MonoGenericClass *gclass)
2267 {
2268 int i;
2269
2270 /* FIXME: The dynamic case */
2271 if (gclass->cached_class && !gclass->cached_class->image->dynamic && !mono_generic_class_is_generic_type_definition (gclass)) {
2272 MonoClass *class = gclass->cached_class;
2273
2274 /* Allocated in mono_class_init () */
2275 g_free (class->methods);
2276 g_free (class->properties);
2277 /* Allocated in mono_generic_class_get_class () */
2278 g_free (class->interfaces);
2279 g_free (class);
2280 } else if (gclass->is_dynamic) {
2281 MonoDynamicGenericClass *dgclass = (MonoDynamicGenericClass *)gclass;
2282
2283 for (i = 0; i < dgclass->count_fields; ++i) {
2284 MonoClassField *field = dgclass->fields + i;
2285 mono_metadata_free_type (field->type);
2286 g_free ((char*)field->name);
2287 }
2288 for (i = 0; i < dgclass->count_properties; ++i) {
2289 MonoProperty *property = dgclass->properties + i;
2290 g_free ((char*)property->name);
2291 }
2292 for (i = 0; i < dgclass->count_events; ++i) {
2293 MonoEvent *event = dgclass->events + i;
2294 g_free ((char*)event->name);
2295 }
2296
2297 g_free (dgclass->methods);
2298 g_free (dgclass->ctors);
2299 g_free (dgclass->fields);
2300 g_free (dgclass->properties);
2301 g_free (dgclass->events);
2302 g_free (dgclass->field_objects);
2303 g_free (dgclass->field_generic_types);
2304 if (!mono_generic_class_is_generic_type_definition (gclass))
2305 g_free (gclass->cached_class);
2306 }
2307 g_free (gclass);
2308 }
2309
2310 static void
2311 free_inflated_signature (MonoInflatedMethodSignature *sig)
2312 {
2313 mono_metadata_free_inflated_signature (sig->sig);
2314 g_free (sig);
2315 }
2316
2317 /*
2318 * LOCKING: assumes the loader lock is held.
2319 */
2320 MonoMethodInflated*
2321 mono_method_inflated_lookup (MonoMethodInflated* method, gboolean cache)
2322 {
2323 if (cache) {
2324 if (!generic_method_cache)
2325 generic_method_cache = g_hash_table_new_full (inflated_method_hash, inflated_method_equal, NULL, (GDestroyNotify)free_inflated_method);
2326 g_hash_table_insert (generic_method_cache, method, method);
2327 return method;
2328 } else {
2329 if (generic_method_cache)
2330 return g_hash_table_lookup (generic_method_cache, method);
2331 return NULL;
2332 }
2333 }
2334
2335 /*
2336 * mono_metadata_get_inflated_signature:
2337 *
2338 * Given an inflated signature and a generic context, return a canonical copy of the
2339 * signature. The returned signature might be equal to SIG or it might be a cached copy.
2340 */
2341 MonoMethodSignature *
2342 mono_metadata_get_inflated_signature (MonoMethodSignature *sig, MonoGenericContext *context)
2343 {
2344 MonoInflatedMethodSignature helper;
2345 MonoInflatedMethodSignature *res;
2346
2347 mono_loader_lock ();
2348 if (!generic_signature_cache)
2349 generic_signature_cache = g_hash_table_new_full (inflated_signature_hash, inflated_signature_equal, NULL, (GDestroyNotify)free_inflated_signature);
2350
2351 helper.sig = sig;
2352 helper.context.class_inst = context->class_inst;
2353 helper.context.method_inst = context->method_inst;
2354 res = g_hash_table_lookup (generic_signature_cache, &helper);
2355 if (!res) {
2356 res = g_new0 (MonoInflatedMethodSignature, 1);
2357 res->sig = sig;
2358 res->context.class_inst = context->class_inst;
2359 res->context.method_inst = context->method_inst;
2360 g_hash_table_insert (generic_signature_cache, res, res);
2361 }
2362
2363 mono_loader_unlock ();
2364 return res->sig;
2365 }
2366
2367 /*
2368 * mono_metadata_get_generic_inst:
2369 *
2370 * Given a list of types, return a MonoGenericInst that represents that list.
2371 * The returned MonoGenericInst has its own copy of the list of types. The list
2372 * passed in the argument can be freed, modified or disposed of.
2373 *
2374 */
2375 MonoGenericInst *
2376 mono_metadata_get_generic_inst (int type_argc, MonoType **type_argv)
2377 {
2378 MonoGenericInst *ginst;
2379 MonoGenericInst helper;
2380 int i;
2381
2382 helper.type_argc = type_argc;
2383 helper.type_argv = type_argv;
2384 helper.id = 0;
2385
2386 for (i = 0; i < type_argc; ++i)
2387 if (mono_class_is_open_constructed_type (type_argv [i]))
2388 break;
2389 helper.is_open = (i < type_argc);
2390
2391 /*dump_ginst (&helper);*/
2392 mono_loader_lock ();
2393 ginst = g_hash_table_lookup (generic_inst_cache, &helper);
2394 if (ginst) {
2395 mono_loader_unlock ();
2396 /*g_print (" found cached\n");*/
2397 return ginst;
2398 }
2399
2400 ginst = g_new0 (MonoGenericInst, 1);
2401 ginst->type_argc = type_argc;
2402 ginst->type_argv = g_new (MonoType*, type_argc);
2403 ginst->id = ++next_generic_inst_id;
2404 ginst->is_open = helper.is_open;
2405
2406 for (i = 0; i < type_argc; ++i)
2407 ginst->type_argv [i] = mono_metadata_type_dup (NULL, type_argv [i]);
2408
2409 g_hash_table_insert (generic_inst_cache, ginst, ginst);
2410
2411 mono_loader_unlock ();
2412 /*g_print (" inserted\n");*/
2413 return ginst;
2414 }
2415
2416 static gboolean
2417 mono_metadata_is_type_builder_generic_type_definition (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2418 {
2419 MonoGenericContainer *container = container_class->generic_container;
2420
2421 if (!is_dynamic || container_class->wastypebuilder || container->type_argc != inst->type_argc)
2422 return FALSE;
2423 return inst == container->context.class_inst;
2424 }
2425
2426 /*
2427 * mono_metadata_lookup_generic_class:
2428 *
2429 * Returns a MonoGenericClass with the given properties.
2430 *
2431 */
2432 MonoGenericClass *
2433 mono_metadata_lookup_generic_class (MonoClass *container_class, MonoGenericInst *inst, gboolean is_dynamic)
2434 {
2435 MonoGenericClass *gclass;
2436 MonoGenericClass helper;
2437 gboolean is_tb_open = mono_metadata_is_type_builder_generic_type_definition (container_class, inst, is_dynamic);
2438
2439 helper.container_class = container_class;
2440 helper.context.class_inst = inst;
2441 helper.context.method_inst = NULL;
2442 helper.is_dynamic = is_dynamic; /* We use this in a hash lookup, which does not attempt to downcast the pointer */
2443 helper.is_tb_open = is_tb_open;
2444 helper.cached_class = NULL;
2445
2446 mono_loader_lock ();
2447
2448 gclass = g_hash_table_lookup (generic_class_cache, &helper);
2449
2450 /* A tripwire just to keep us honest */
2451 g_assert (!helper.cached_class);
2452
2453 if (gclass) {
2454 mono_loader_unlock ();
2455 return gclass;
2456 }
2457
2458 if (is_dynamic) {
2459 MonoDynamicGenericClass *dgclass = g_new0 (MonoDynamicGenericClass, 1);
2460 gclass = &dgclass->generic_class;
2461 gclass->is_dynamic = 1;
2462 } else {
2463 gclass = g_new0 (MonoGenericClass, 1);
2464 }
2465
2466 gclass->is_tb_open = is_tb_open;
2467 gclass->container_class = container_class;
2468 gclass->context.class_inst = inst;
2469 gclass->context.method_inst = NULL;
2470 if (inst == container_class->generic_container->context.class_inst && !is_tb_open)
2471 gclass->cached_class = container_class;
2472
2473 g_hash_table_insert (generic_class_cache, gclass, gclass);
2474
2475 mono_loader_unlock ();
2476
2477 return gclass;
2478 }
2479
2480 /*
2481 * mono_metadata_inflate_generic_inst:
2482 *
2483 * Instantiate the generic instance @ginst with the context @context.
2484 *
2485 */
2486 MonoGenericInst *
2487 mono_metadata_inflate_generic_inst (MonoGenericInst *ginst, MonoGenericContext *context)
2488 {
2489 MonoType **type_argv;
2490 MonoGenericInst *nginst;
2491 int i;
2492
2493 if (!ginst->is_open)
2494 return ginst;
2495
2496 type_argv = g_new0 (MonoType*, ginst->type_argc);
2497
2498 for (i = 0; i < ginst->type_argc; i++)
2499 type_argv [i] = mono_class_inflate_generic_type (ginst->type_argv [i], context);
2500
2501 nginst = mono_metadata_get_generic_inst (ginst->type_argc, type_argv);
2502
2503 for (i = 0; i < ginst->type_argc; i++)
2504 mono_metadata_free_type (type_argv [i]);
2505 g_free (type_argv);
2506
2507 return nginst;
2508 }
2509
2510 MonoGenericInst *
2511 mono_metadata_parse_generic_inst (MonoImage *m, MonoGenericContainer *container,
2512 int count, const char *ptr, const char **rptr)
2513 {
2514 MonoType **type_argv;
2515 MonoGenericInst *ginst;
2516 int i;
2517
2518 type_argv = g_new0 (MonoType*, count);
2519
2520 for (i = 0; i < count; i++) {
2521 MonoType *t = mono_metadata_parse_type_full (m, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
2522 if (!t) {
2523 g_free (type_argv);
2524 return NULL;
2525 }
2526 type_argv [i] = t;
2527 }
2528
2529 if (rptr)
2530 *rptr = ptr;
2531
2532 ginst = mono_metadata_get_generic_inst (count, type_argv);
2533
2534 g_free (type_argv);
2535
2536 return ginst;
2537 }
2538
2539 static gboolean
2540 do_mono_metadata_parse_generic_class (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2541 const char *ptr, const char **rptr)
2542 {
2543 MonoGenericInst *inst;
2544 MonoClass *gklass;
2545 MonoType *gtype;
2546 int count;
2547
2548 gtype = mono_metadata_parse_type (m, MONO_PARSE_TYPE, 0, ptr, &ptr);
2549 if (gtype == NULL)
2550 return FALSE;
2551
2552 gklass = mono_class_from_mono_type (gtype);
2553 if (!gklass->generic_container)
2554 return FALSE;
2555
2556 count = mono_metadata_decode_value (ptr, &ptr);
2557 inst = mono_metadata_parse_generic_inst (m, container, count, ptr, &ptr);
2558 if (inst == NULL)
2559 return FALSE;
2560
2561 if (rptr)
2562 *rptr = ptr;
2563
2564 type->data.generic_class = mono_metadata_lookup_generic_class (gklass, inst, FALSE);
2565 return TRUE;
2566 }
2567
2568 /*
2569 * select_container:
2570 * @gc: The generic container to normalize
2571 * @type: The kind of generic parameters the resulting generic-container should contain
2572 */
2573
2574 static MonoGenericContainer *
2575 select_container (MonoGenericContainer *gc, MonoTypeEnum type)
2576 {
2577 gboolean is_var = (type == MONO_TYPE_VAR);
2578 if (!gc)
2579 return NULL;
2580
2581 g_assert (is_var || type == MONO_TYPE_MVAR);
2582
2583 if (is_var) {
2584 if (gc->is_method || gc->parent)
2585 /*
2586 * The current MonoGenericContainer is a generic method -> its `parent'
2587 * points to the containing class'es container.
2588 */
2589 return gc->parent;
2590 }
2591
2592 return gc;
2593 }
2594
2595 /*
2596 * mono_metadata_parse_generic_param:
2597 * @generic_container: Our MonoClass's or MonoMethodNormal's MonoGenericContainer;
2598 * see mono_metadata_parse_type_full() for details.
2599 * Internal routine to parse a generic type parameter.
2600 * LOCKING: Acquires the loader lock
2601 */
2602 static MonoGenericParam *
2603 mono_metadata_parse_generic_param (MonoImage *m, MonoGenericContainer *generic_container,
2604 MonoTypeEnum type, const char *ptr, const char **rptr)
2605 {
2606 int index = mono_metadata_decode_value (ptr, &ptr);
2607 if (rptr)
2608 *rptr = ptr;
2609
2610 generic_container = select_container (generic_container, type);
2611 if (!generic_container) {
2612 /* Create dummy MonoGenericParam */
2613 MonoGenericParam *param;
2614
2615 param = mono_image_alloc0_lock (m, sizeof (MonoGenericParam));
2616 param->name = mono_image_alloc0_lock (m, 8);
2617 sprintf ((char*)param->name, "%d", index);
2618 param->num = index;
2619 param->image = m;
2620
2621 return param;
2622 }
2623
2624 g_assert (index < generic_container->type_argc);
2625 return &generic_container->type_params [index];
2626 }
2627
2628 /*
2629 * mono_metadata_get_shared_type:
2630 *
2631 * Return a shared instance of TYPE, if available, NULL otherwise.
2632 * Shared MonoType instances help save memory. Their contents should not be modified
2633 * by the caller. They do not need to be freed as their lifetime is bound by either
2634 * the lifetime of the runtime (builtin types), or the lifetime of the MonoClass
2635 * instance they are embedded in. If they are freed, they should be freed using
2636 * mono_metadata_free_type () instead of g_free ().
2637 */
2638 MonoType*
2639 mono_metadata_get_shared_type (MonoType *type)
2640 {
2641 MonoType *cached;
2642
2643 /* No need to use locking since nobody is modifying the hash table */
2644 if ((cached = g_hash_table_lookup (type_cache, type)))
2645 return cached;
2646
2647 switch (type->type){
2648 case MONO_TYPE_CLASS:
2649 case MONO_TYPE_VALUETYPE:
2650 if (type == &type->data.klass->byval_arg)
2651 return type;
2652 if (type == &type->data.klass->this_arg)
2653 return type;
2654 break;
2655 }
2656
2657 return NULL;
2658 }
2659
2660 /*
2661 * do_mono_metadata_parse_type:
2662 * @type: MonoType to be filled in with the return value
2663 * @m: image context
2664 * @generic_context: generics_context
2665 * @ptr: pointer to the encoded type
2666 * @rptr: pointer where the end of the encoded type is saved
2667 *
2668 * Internal routine used to "fill" the contents of @type from an
2669 * allocated pointer. This is done this way to avoid doing too
2670 * many mini-allocations (particularly for the MonoFieldType which
2671 * most of the time is just a MonoType, but sometimes might be augmented).
2672 *
2673 * This routine is used by mono_metadata_parse_type and
2674 * mono_metadata_parse_field_type
2675 *
2676 * This extracts a Type as specified in Partition II (22.2.12)
2677 *
2678 * Returns: FALSE if the type could not be loaded
2679 */
2680 static gboolean
2681 do_mono_metadata_parse_type (MonoType *type, MonoImage *m, MonoGenericContainer *container,
2682 const char *ptr, const char **rptr)
2683 {
2684 gboolean ok = TRUE;
2685 type->type = mono_metadata_decode_value (ptr, &ptr);
2686
2687 switch (type->type){
2688 case MONO_TYPE_VOID:
2689 case MONO_TYPE_BOOLEAN:
2690 case MONO_TYPE_CHAR:
2691 case MONO_TYPE_I1:
2692 case MONO_TYPE_U1:
2693 case MONO_TYPE_I2:
2694 case MONO_TYPE_U2:
2695 case MONO_TYPE_I4:
2696 case MONO_TYPE_U4:
2697 case MONO_TYPE_I8:
2698 case MONO_TYPE_U8:
2699 case MONO_TYPE_R4:
2700 case MONO_TYPE_R8:
2701 case MONO_TYPE_I:
2702 case MONO_TYPE_U:
2703 case MONO_TYPE_STRING:
2704 case MONO_TYPE_OBJECT:
2705 case MONO_TYPE_TYPEDBYREF:
2706 break;
2707 case MONO_TYPE_VALUETYPE:
2708 case MONO_TYPE_CLASS: {
2709 guint32 token;
2710 token = mono_metadata_parse_typedef_or_ref (m, ptr, &ptr);
2711 type->data.klass = mono_class_get (m, token);
2712 if (!type->data.klass)
2713 return FALSE;
2714 break;
2715 }
2716 case MONO_TYPE_SZARRAY: {
2717 MonoType *etype = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2718 if (!etype)
2719 return FALSE;
2720 type->data.klass = mono_class_from_mono_type (etype);
2721 break;
2722 }
2723 case MONO_TYPE_PTR:
2724 type->data.type = mono_metadata_parse_type_full (m, container, MONO_PARSE_MOD_TYPE, 0, ptr, &ptr);
2725 if (!type->data.type)
2726 return FALSE;
2727 break;
2728 case MONO_TYPE_FNPTR:
2729 type->data.method = mono_metadata_parse_method_signature_full (m, container, 0, ptr, &ptr);
2730 break;
2731 case MONO_TYPE_ARRAY:
2732 type->data.array = mono_metadata_parse_array_full (m, container, ptr, &ptr);
2733 break;
2734 case MONO_TYPE_MVAR:
2735 case MONO_TYPE_VAR:
2736 type->data.generic_param = mono_metadata_parse_generic_param (m, container, type->type, ptr, &ptr);
2737 break;
2738 case MONO_TYPE_GENERICINST:
2739 ok = do_mono_metadata_parse_generic_class (type, m, container, ptr, &ptr);
2740 break;
2741 default:
2742 g_error ("type 0x%02x not handled in do_mono_metadata_parse_type", type->type);
2743 }
2744
2745 if (rptr)
2746 *rptr = ptr;
2747 return ok;
2748 }
2749
2750 /*
2751 * mono_metadata_free_type:
2752 * @type: type to free
2753 *
2754 * Free the memory allocated for type @type which is allocated on the heap.
2755 */
2756 void
2757 mono_metadata_free_type (MonoType *type)
2758 {
2759 if (type >= builtin_types && type < builtin_types + NBUILTIN_TYPES ())
2760 return;
2761
2762 switch (type->type){
2763 case MONO_TYPE_OBJECT:
2764 case MONO_TYPE_STRING:
2765 if (!type->data.klass)
2766 break;
2767 /* fall through */
2768 case MONO_TYPE_CLASS:
2769 case MONO_TYPE_VALUETYPE:
2770 if (type == &type->data.klass->byval_arg || type == &type->data.klass->this_arg)
2771 return;
2772 break;
2773 case MONO_TYPE_PTR:
2774 mono_metadata_free_type (type->data.type);
2775 break;
2776 case MONO_TYPE_FNPTR:
2777 mono_metadata_free_method_signature (type->data.method);
2778 break;
2779 case MONO_TYPE_ARRAY:
2780 mono_metadata_free_array (type->data.array);
2781 break;
2782 }
2783
2784 g_free (type);
2785 }
2786
2787 #if 0
2788 static void
2789 hex_dump (const char *buffer, int base, int count)
2790 {
2791 int show_header = 1;
2792 int i;
2793
2794 if (count < 0){
2795 count = -count;
2796 show_header = 0;
2797 }
2798
2799 for (i = 0; i < count; i++){
2800 if (show_header)
2801 if ((i % 16) == 0)
2802 printf ("\n0x%08x: ", (unsigned char) base + i);
2803
2804 printf ("%02x ", (unsigned char) (buffer [i]));
2805 }
2806 fflush (stdout);
2807 }
2808 #endif
2809
2810 /**
2811 * @mh: The Method header
2812 * @ptr: Points to the beginning of the Section Data (25.3)
2813 */
2814 static void
2815 parse_section_data (MonoImage *m, MonoMethodHeader *mh, const unsigned char *ptr)
2816 {
2817 unsigned char sect_data_flags;
2818 const unsigned char *sptr;
2819 int is_fat;
2820 guint32 sect_data_len;
2821
2822 while (1) {
2823 /* align on 32-bit boundary */
2824 sptr = ptr = dword_align (ptr);
2825 sect_data_flags = *ptr;
2826 ptr++;
2827
2828 is_fat = sect_data_flags & METHOD_HEADER_SECTION_FAT_FORMAT;
2829 if (is_fat) {
2830 sect_data_len = (ptr [2] << 16) | (ptr [1] << 8) | ptr [0];
2831 ptr += 3;
2832 } else {
2833 sect_data_len = ptr [0];
2834 ++ptr;
2835 }
2836 /*
2837 g_print ("flags: %02x, len: %d\n", sect_data_flags, sect_data_len);
2838 hex_dump (sptr, 0, sect_data_len+8);
2839 g_print ("\nheader: ");
2840 hex_dump (sptr-4, 0, 4);
2841 g_print ("\n");
2842 */
2843
2844 if (sect_data_flags & METHOD_HEADER_SECTION_EHTABLE) {
2845 const unsigned char *p = dword_align (ptr);
2846 int i;
2847 mh->num_clauses = is_fat ? sect_data_len / 24: sect_data_len / 12;
2848 /* we could just store a pointer if we don't need to byteswap */
2849 mh->clauses = mono_image_alloc0_lock (m, sizeof (MonoExceptionClause) * mh->num_clauses);
2850 for (i = 0; i < mh->num_clauses; ++i) {
2851 MonoExceptionClause *ec = &mh->clauses [i];
2852 guint32 tof_value;
2853 if (is_fat) {
2854 ec->flags = read32 (p);
2855 ec->try_offset = read32 (p + 4);
2856 ec->try_len = read32 (p + 8);
2857 ec->handler_offset = read32 (p + 12);
2858 ec->handler_len = read32 (p + 16);
2859 tof_value = read32 (p + 20);
2860 p += 24;
2861 } else {
2862 ec->flags = read16 (p);
2863 ec->try_offset = read16 (p + 2);
2864 ec->try_len = *(p + 4);
2865 ec->handler_offset = read16 (p + 5);
2866 ec->handler_len = *(p + 7);
2867 tof_value = read32 (p + 8);
2868 p += 12;
2869 }
2870 if (ec->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2871 ec->data.filter_offset = tof_value;
2872 } else if (ec->flags == MONO_EXCEPTION_CLAUSE_NONE) {
2873 ec->data.catch_class = tof_value? mono_class_get (m, tof_value): 0;
2874 } else {
2875 ec->data.catch_class = NULL;
2876 }
2877 /* g_print ("try %d: %x %04x-%04x %04x\n", i, ec->flags, ec->try_offset, ec->try_offset+ec->try_len, ec->try_len); */
2878 }
2879
2880 }
2881 if (sect_data_flags & METHOD_HEADER_SECTION_MORE_SECTS)
2882 ptr += sect_data_len - 4; /* LAMESPEC: it seems the size includes the header */
2883 else
2884 return;
2885 }
2886 }
2887
2888 /*
2889 * mono_metadata_parse_mh_full:
2890 * @m: metadata context
2891 * @generic_context: generics context
2892 * @ptr: pointer to the method header.
2893 *
2894 * Decode the method header at @ptr, including pointer to the IL code,
2895 * info about local variables and optional exception tables.
2896 * This is a Mono runtime internal function.
2897 *
2898 * LOCKING: Acquires the loader lock.
2899 *
2900 * Returns: a MonoMethodHeader allocated from the image mempool.
2901 */
2902 MonoMethodHeader *
2903 mono_metadata_parse_mh_full (MonoImage *m, MonoGenericContainer *container, const char *ptr)
2904 {
2905 MonoMethodHeader *mh;
2906 unsigned char flags = *(const unsigned char *) ptr;
2907 unsigned char format = flags & METHOD_HEADER_FORMAT_MASK;
2908 guint16 fat_flags;
2909 guint32 local_var_sig_tok, max_stack, code_size, init_locals;
2910 const unsigned char *code;
2911 int hsize;
2912
2913 g_return_val_if_fail (ptr != NULL, NULL);
2914
2915 switch (format) {
2916 case METHOD_HEADER_TINY_FORMAT:
2917 mh = mono_image_alloc0_lock (m, sizeof (MonoMethodHeader));
2918 ptr++;
2919 mh->max_stack = 8;
2920 local_var_sig_tok = 0;
2921 mh->code_size = flags >> 2;
2922 mh->code = (unsigned char*)ptr;
2923 return mh;
2924 case METHOD_HEADER_TINY_FORMAT1:
2925 mh = mono_image_alloc0_lock (m, sizeof (MonoMethodHeader));
2926 ptr++;
2927 mh->max_stack = 8;
2928 local_var_sig_tok = 0;
2929
2930 /*
2931 * The spec claims 3 bits, but the Beta2 is
2932 * incorrect
2933 */
2934 mh->code_size = flags >> 2;
2935 mh->code = (unsigned char*)ptr;
2936 return mh;
2937 case METHOD_HEADER_FAT_FORMAT:
2938 fat_flags = read16 (ptr);
2939 ptr += 2;
2940 hsize = (fat_flags >> 12) & 0xf;
2941 max_stack = read16 (ptr);
2942 ptr += 2;
2943 code_size = read32 (ptr);
2944 ptr += 4;
2945 local_var_sig_tok = read32 (ptr);
2946 ptr += 4;
2947
2948 if (fat_flags & METHOD_HEADER_INIT_LOCALS)
2949 init_locals = 1;
2950 else
2951 init_locals = 0;
2952
2953 code = (unsigned char*)ptr;
2954
2955 if (!(fat_flags & METHOD_HEADER_MORE_SECTS))
2956 break;
2957
2958 /*
2959 * There are more sections
2960 */
2961 ptr = (char*)code + code_size;
2962 break;
2963 default:
2964 return NULL;
2965 }
2966
2967 if (local_var_sig_tok) {
2968 MonoTableInfo *t = &m->tables [MONO_TABLE_STANDALONESIG];
2969 const char *locals_ptr;
2970 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
2971 int len=0, i, bsize;
2972
2973 mono_metadata_decode_row (t, (local_var_sig_tok & 0xffffff)-1, cols, 1);
2974 locals_ptr = mono_metadata_blob_heap (m, cols [MONO_STAND_ALONE_SIGNATURE]);
2975 bsize = mono_metadata_decode_blob_size (locals_ptr, &locals_ptr);
2976 if (*locals_ptr != 0x07)
2977 g_warning ("wrong signature for locals blob");
2978 locals_ptr++;
2979 len = mono_metadata_decode_value (locals_ptr, &locals_ptr);
2980 mh = mono_image_alloc0_lock (m, sizeof (MonoMethodHeader) + (len - MONO_ZERO_LEN_ARRAY) * sizeof (MonoType*));
2981 mh->num_locals = len;
2982 for (i = 0; i < len; ++i) {
2983 mh->locals [i] = mono_metadata_parse_type_full (
2984 m, container, MONO_PARSE_LOCAL, 0, locals_ptr, &locals_ptr);
2985 if (!mh->locals [i]) {
2986 return NULL;
2987 }
2988 }
2989 } else {
2990 mh = mono_image_alloc0_lock (m, sizeof (MonoMethodHeader));
2991 }
2992 mh->code = code;
2993 mh->code_size = code_size;
2994 mh->max_stack = max_stack;
2995 mh->init_locals = init_locals;
2996 if (fat_flags & METHOD_HEADER_MORE_SECTS)
2997 parse_section_data (m, mh, (const unsigned char*)ptr);
2998 return mh;
2999 }
3000
3001 /*
3002 * mono_metadata_parse_mh:
3003 * @generic_context: generics context
3004 * @ptr: pointer to the method header.
3005 *
3006 * Decode the method header at @ptr, including pointer to the IL code,
3007 * info about local variables and optional exception tables.
3008 * This is a Mono runtime internal function.
3009 *
3010 * Returns: a MonoMethodHeader.
3011 */
3012 MonoMethodHeader *
3013 mono_metadata_parse_mh (MonoImage *m, const char *ptr)
3014 {
3015 MonoMethodHeader *res;
3016
3017 mono_loader_lock ();
3018
3019 res = mono_metadata_parse_mh_full (m, NULL, ptr);
3020
3021 mono_loader_unlock ();
3022
3023 return res;
3024 }
3025
3026 /*
3027 * mono_metadata_free_mh:
3028 * @mh: a method header
3029 *
3030 * Free the memory allocated for the method header.
3031 * This is a Mono runtime internal function.
3032 */
3033 void
3034 mono_metadata_free_mh (MonoMethodHeader *mh)
3035 {
3036 /* Allocated from the mempool */
3037 }
3038
3039 /*
3040 * mono_method_header_get_code:
3041 * @header: a MonoMethodHeader pointer
3042 * @code_size: memory location for returning the code size
3043 * @max_stack: memory location for returning the max stack
3044 *
3045 * Method header accessor to retreive info about the IL code properties:
3046 * a pointer to the IL code itself, the size of the code and the max number
3047 * of stack slots used by the code.
3048 *
3049 * Returns: pointer to the IL code represented by the method header.
3050 */
3051 const unsigned char*
3052 mono_method_header_get_code (MonoMethodHeader *header, guint32* code_size, guint32* max_stack)
3053 {
3054 if (code_size)
3055 *code_size = header->code_size;
3056 if (max_stack)
3057 *max_stack = header->max_stack;
3058 return header->code;
3059 }
3060
3061 /*
3062 * mono_method_header_get_locals:
3063 * @header: a MonoMethodHeader pointer
3064 * @num_locals: memory location for returning the number of local variables
3065 * @init_locals: memory location for returning the init_locals flag
3066 *
3067 * Method header accessor to retreive info about the local variables:
3068 * an array of local types, the number of locals and whether the locals
3069 * are supposed to be initialized to 0 on method entry
3070 *
3071 * Returns: pointer to an array of types of the local variables
3072 */
3073 MonoType**
3074 mono_method_header_get_locals (MonoMethodHeader *header, guint32* num_locals, gboolean *init_locals)
3075 {
3076 if (num_locals)
3077 *num_locals = header->num_locals;
3078 if (init_locals)
3079 *init_locals = header->init_locals;
3080 return header->locals;
3081 }
3082
3083 /*
3084 * mono_method_header_get_num_clauses:
3085 * @header: a MonoMethodHeader pointer
3086 *
3087 * Method header accessor to retreive the number of exception clauses.
3088 *
3089 * Returns: the number of exception clauses present
3090 */
3091 int
3092 mono_method_header_get_num_clauses (MonoMethodHeader *header)
3093 {
3094 return header->num_clauses;
3095 }
3096
3097 /*
3098 * mono_method_header_get_clauses:
3099 * @header: a MonoMethodHeader pointer
3100 * @method: MonoMethod the header belongs to
3101 * @iter: pointer to a iterator
3102 * @clause: pointer to a MonoExceptionClause structure which will be filled with the info
3103 *
3104 * Get the info about the exception clauses in the method. Set *iter to NULL to
3105 * initiate the iteration, then call the method repeatedly until it returns FALSE.
3106 * At each iteration, the structure pointed to by clause if filled with the
3107 * exception clause information.
3108 *
3109 * Returns: TRUE if clause was filled with info, FALSE if there are no more exception
3110 * clauses.
3111 */
3112 int
3113 mono_method_header_get_clauses (MonoMethodHeader *header, MonoMethod *method, gpointer *iter, MonoExceptionClause *clause)
3114 {
3115 MonoExceptionClause *sc;
3116 /* later we'll be able to use this interface to parse the clause info on demand,
3117 * without allocating anything.
3118 */
3119 if (!iter || !header->num_clauses)
3120 return FALSE;
3121 if (!*iter) {
3122 *iter = sc = header->clauses;
3123 *clause = *sc;
3124 return TRUE;
3125 }
3126 sc = *iter;
3127 sc++;
3128 if (sc < header->clauses + header->num_clauses) {
3129 *iter = sc;
3130 *clause = *sc;
3131 return TRUE;
3132 }
3133 return FALSE;
3134 }
3135
3136 /**
3137 * mono_metadata_parse_field_type:
3138 * @m: metadata context to extract information from
3139 * @ptr: pointer to the field signature
3140 * @rptr: pointer updated to match the end of the decoded stream
3141 *
3142 * Parses the field signature, and returns the type information for it.
3143 *
3144 * Returns: The MonoType that was extracted from @ptr.
3145 */
3146 MonoType *
3147 mono_metadata_parse_field_type (MonoImage *m, short field_flags, const char *ptr, const char **rptr)
3148 {
3149 return mono_metadata_parse_type (m, MONO_PARSE_FIELD, field_flags, ptr, rptr);
3150 }
3151
3152 /**
3153 * mono_metadata_parse_param:
3154 * @m: metadata context to extract information from
3155 * @ptr: pointer to the param signature
3156 * @rptr: pointer updated to match the end of the decoded stream
3157 *
3158 * Parses the param signature, and returns the type information for it.
3159 *
3160 * Returns: The MonoType that was extracted from @ptr.
3161 */
3162 MonoType *
3163 mono_metadata_parse_param (MonoImage *m, const char *ptr, const char **rptr)
3164 {
3165 return mono_metadata_parse_type (m, MONO_PARSE_PARAM, 0, ptr, rptr);
3166 }
3167
3168 /*
3169 * mono_metadata_token_from_dor:
3170 * @dor_token: A TypeDefOrRef coded index
3171 *
3172 * dor_token is a TypeDefOrRef coded index: it contains either
3173 * a TypeDef, TypeRef or TypeSpec in the lower bits, and the upper
3174 * bits contain an index into the table.
3175 *
3176 * Returns: an expanded token
3177 */
3178 guint32
3179 mono_metadata_token_from_dor (guint32 dor_index)
3180 {
3181 guint32 table, idx;
3182
3183 table = dor_index & 0x03;
3184 idx = dor_index >> 2;
3185
3186 switch (table){
3187 case 0: /* TypeDef */
3188 return MONO_TOKEN_TYPE_DEF | idx;
3189 case 1: /* TypeRef */
3190 return MONO_TOKEN_TYPE_REF | idx;
3191 case 2: /* TypeSpec */
3192 return MONO_TOKEN_TYPE_SPEC | idx;
3193 default:
3194 g_assert_not_reached ();
3195 }
3196
3197 return 0;
3198 }
3199
3200 /*
3201 * We use this to pass context information to the row locator
3202 */
3203 typedef struct {
3204 int idx; /* The index that we are trying to locate */
3205 int col_idx; /* The index in the row where idx may be stored */
3206 MonoTableInfo *t; /* pointer to the table */
3207 guint32 result;
3208 } locator_t;
3209
3210 /*
3211 * How the row locator works.
3212 *
3213 * Table A
3214 * ___|___
3215 * ___|___ Table B
3216 * ___|___------> _______
3217 * ___|___ _______
3218 *
3219 * A column in the rows of table A references an index in table B.
3220 * For example A may be the TYPEDEF table and B the METHODDEF table.
3221 *
3222 * Given an index in table B we want to get the row in table A
3223 * where the column n references our index in B.
3224 *
3225 * In the locator_t structure:
3226 * t is table A
3227 * col_idx is the column number
3228 * index is the index in table B
3229 * result will be the index in table A
3230 *
3231 * Examples:
3232 * Table A Table B column (in table A)
3233 * TYPEDEF METHODDEF MONO_TYPEDEF_METHOD_LIST
3234 * TYPEDEF FIELD MONO_TYPEDEF_FIELD_LIST
3235 * PROPERTYMAP PROPERTY MONO_PROPERTY_MAP_PROPERTY_LIST
3236 * INTERFIMPL TYPEDEF MONO_INTERFACEIMPL_CLASS
3237 * METHODSEM PROPERTY ASSOCIATION (encoded index)
3238 *
3239 * Note that we still don't support encoded indexes.
3240 *
3241 */
3242 static int
3243 typedef_locator (const void *a, const void *b)
3244 {
3245 locator_t *loc = (locator_t *) a;
3246 const char *bb = (const char *) b;
3247 int typedef_index = (bb - loc->t->base) / loc->t->row_size;
3248 guint32 col, col_next;
3249
3250 col = mono_metadata_decode_row_col (loc->t, typedef_index, loc->col_idx);
3251
3252 if (loc->idx < col)
3253 return -1;
3254
3255 /*
3256 * Need to check that the next row is valid.
3257 */
3258 if (typedef_index + 1 < loc->t->rows) {
3259 col_next = mono_metadata_decode_row_col (loc->t, typedef_index + 1, loc->col_idx);
3260 if (loc->idx >= col_next)
3261 return 1;
3262
3263 if (col == col_next)
3264 return 1;
3265 }
3266
3267 loc->result = typedef_index;
3268
3269 return 0;
3270 }
3271
3272 static int
3273 table_locator (const void *a, const void *b)
3274 {
3275 locator_t *loc = (locator_t *) a;
3276 const char *bb = (const char *) b;
3277 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
3278 guint32 col;
3279
3280 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
3281
3282 if (loc->idx == col) {
3283 loc->result = table_index;
3284 return 0;
3285 }
3286 if (loc->idx < col)
3287 return -1;
3288 else
3289 return 1;
3290 }
3291
3292 static int
3293 declsec_locator (const void *a, const void *b)
3294 {
3295 locator_t *loc = (locator_t *) a;
3296 const char *bb = (const char *) b;
3297 guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
3298 guint32 col;
3299
3300 col = mono_metadata_decode_row_col (loc->t, table_index, loc->col_idx);
3301
3302 if (loc->idx == col) {
3303 loc->result = table_index;
3304 return 0;
3305 }
3306 if (loc->idx < col)
3307 return -1;
3308 else
3309 return 1;
3310 }
3311
3312 /**
3313 * search_ptr_table:
3314 *
3315 * Return the 1-based row index in TABLE, which must be one of the *Ptr tables,
3316 * which contains IDX.
3317 */
3318 static guint32
3319 search_ptr_table (MonoImage *image, int table, int idx)
3320 {
3321 MonoTableInfo *ptrdef = &image->tables [table];
3322 int i;
3323
3324 /* Use a linear search to find our index in the table */
3325 for (i = 0; i < ptrdef->rows; i ++)
3326 /* All the Ptr tables have the same structure */
3327 if (mono_metadata_decode_row_col (ptrdef, i, 0) == idx)
3328 break;
3329
3330 if (i < ptrdef->rows)
3331 return i + 1;
3332 else
3333 return idx;
3334 }
3335
3336 /**
3337 * mono_metadata_typedef_from_field:
3338 * @meta: metadata context
3339 * @index: FieldDef token
3340 *
3341 * Returns: the 1-based index into the TypeDef table of the type that
3342 * declared the field described by @index, or 0 if not found.
3343 */
3344 guint32
3345 mono_metadata_typedef_from_field (MonoImage *meta, guint32 index)
3346 {
3347 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
3348 locator_t loc;
3349
3350 if (!tdef->base)
3351 return 0;
3352
3353 loc.idx = mono_metadata_token_index (index);
3354 loc.col_idx = MONO_TYPEDEF_FIELD_LIST;
3355 loc.t = tdef;
3356
3357 if (meta->uncompressed_metadata)
3358 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
3359
3360 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
3361 g_assert_not_reached ();
3362
3363 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3364 return loc.result + 1;
3365 }
3366
3367 /*
3368 * mono_metadata_typedef_from_method:
3369 * @meta: metadata context
3370 * @index: MethodDef token
3371 *
3372 * Returns: the 1-based index into the TypeDef table of the type that
3373 * declared the method described by @index. 0 if not found.
3374 */
3375 guint32
3376 mono_metadata_typedef_from_method (MonoImage *meta, guint32 index)
3377 {
3378 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_TYPEDEF];
3379 locator_t loc;
3380
3381 if (!tdef->base)
3382 return 0;
3383
3384 loc.idx = mono_metadata_token_index (index);
3385 loc.col_idx = MONO_TYPEDEF_METHOD_LIST;
3386 loc.t = tdef;
3387
3388 if (meta->uncompressed_metadata)
3389 loc.idx = search_ptr_table (meta, MONO_TABLE_METHOD_POINTER, loc.idx);
3390
3391 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, typedef_locator))
3392 g_assert_not_reached ();
3393
3394 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3395 return loc.result + 1;
3396 }
3397
3398 /*
3399 * mono_metadata_interfaces_from_typedef_full:
3400 * @meta: metadata context
3401 * @index: typedef token
3402 *
3403 * The array of interfaces that the @index typedef token implements is returned in
3404 * @interfaces. The number of elemnts in the array is returned in @count.
3405 *
3406 * LOCKING: Assumes the loader lock is held.
3407 *
3408 * Returns: TRUE on success, FALSE on failure.
3409 */
3410 gboolean
3411 mono_metadata_interfaces_from_typedef_full (MonoImage *meta, guint32 index, MonoClass ***interfaces, guint *count, MonoGenericContext *context)
3412 {
3413 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_INTERFACEIMPL];
3414 locator_t loc;
3415 guint32 start, pos;
3416 guint32 cols [MONO_INTERFACEIMPL_SIZE];
3417 MonoClass **result;
3418
3419 *interfaces = NULL;
3420 *count = 0;
3421
3422 if (!tdef->base)
3423 return TRUE;
3424
3425 loc.idx = mono_metadata_token_index (index);
3426 loc.col_idx = MONO_INTERFACEIMPL_CLASS;
3427 loc.t = tdef;
3428
3429 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3430 return TRUE;
3431
3432 start = loc.result;
3433 /*
3434 * We may end up in the middle of the rows...
3435 */
3436 while (start > 0) {
3437 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_INTERFACEIMPL_CLASS))
3438 start--;
3439 else
3440 break;
3441 }
3442 pos = start;
3443 while (pos < tdef->rows) {
3444 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
3445 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
3446 break;
3447 ++pos;
3448 }
3449
3450 result = mono_image_alloc0_lock (meta, sizeof (MonoClass*) * (pos - start));
3451
3452 pos = start;
3453 while (pos < tdef->rows) {
3454 MonoClass *iface;
3455
3456 mono_metadata_decode_row (tdef, pos, cols, MONO_INTERFACEIMPL_SIZE);
3457 if (cols [MONO_INTERFACEIMPL_CLASS] != loc.idx)
3458 break;
3459 iface = mono_class_get_full (
3460 meta, mono_metadata_token_from_dor (cols [MONO_INTERFACEIMPL_INTERFACE]), context);
3461 if (iface == NULL)
3462 return FALSE;
3463 result [pos - start] = iface;
3464 ++pos;
3465 }
3466 *count = pos - start;
3467 *interfaces = result;
3468 return TRUE;
3469 }
3470
3471 MonoClass**
3472 mono_metadata_interfaces_from_typedef (MonoImage *meta, guint32 index, guint *count)
3473 {
3474 MonoClass **interfaces;
3475 gboolean rv;
3476
3477 mono_loader_lock ();
3478 rv = mono_metadata_interfaces_from_typedef_full (meta, index, &interfaces, count, NULL);
3479 mono_loader_unlock ();
3480 if (rv)
3481 return interfaces;
3482 else
3483 return NULL;
3484 }
3485
3486 /*
3487 * mono_metadata_nested_in_typedef:
3488 * @meta: metadata context
3489 * @index: typedef token
3490 *
3491 * Returns: the 1-based index into the TypeDef table of the type
3492 * where the type described by @index is nested.
3493 * Retruns 0 if @index describes a non-nested type.
3494 */
3495 guint32
3496 mono_metadata_nested_in_typedef (MonoImage *meta, guint32 index)
3497 {
3498 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
3499 locator_t loc;
3500
3501 if (!tdef->base)
3502 return 0;
3503
3504 loc.idx = mono_metadata_token_index (index);
3505 loc.col_idx = MONO_NESTED_CLASS_NESTED;
3506 loc.t = tdef;
3507
3508 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3509 return 0;
3510
3511 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3512 return mono_metadata_decode_row_col (tdef, loc.result, MONO_NESTED_CLASS_ENCLOSING) | MONO_TOKEN_TYPE_DEF;
3513 }
3514
3515 /*
3516 * mono_metadata_nesting_typedef:
3517 * @meta: metadata context
3518 * @index: typedef token
3519 *
3520 * Returns: the 1-based index into the TypeDef table of the first type
3521 * that is nested inside the type described by @index. The search starts at
3522 * @start_index. returns 0 if no such type is found.
3523 */
3524 guint32
3525 mono_metadata_nesting_typedef (MonoImage *meta, guint32 index, guint32 start_index)
3526 {
3527 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_NESTEDCLASS];
3528 guint32 start;
3529 guint32 class_index = mono_metadata_token_index (index);
3530
3531 if (!tdef->base)
3532 return 0;
3533
3534 start = start_index;
3535
3536 while (start <= tdef->rows) {
3537 if (class_index == mono_metadata_decode_row_col (tdef, start - 1, MONO_NESTED_CLASS_ENCLOSING))
3538 break;
3539 else
3540 start++;
3541 }
3542
3543 if (start > tdef->rows)
3544 return 0;
3545 else
3546 return start;
3547 }
3548
3549 /*
3550 * mono_metadata_packing_from_typedef:
3551 * @meta: metadata context
3552 * @index: token representing a type
3553 *
3554 * Returns: the info stored in the ClassLAyout table for the given typedef token
3555 * into the @packing and @size pointers.
3556 * Returns 0 if the info is not found.
3557 */
3558 guint32
3559 mono_metadata_packing_from_typedef (MonoImage *meta, guint32 index, guint32 *packing, guint32 *size)
3560 {
3561 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CLASSLAYOUT];
3562 locator_t loc;
3563 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
3564
3565 if (!tdef->base)
3566 return 0;
3567
3568 loc.idx = mono_metadata_token_index (index);
3569 loc.col_idx = MONO_CLASS_LAYOUT_PARENT;
3570 loc.t = tdef;
3571
3572 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3573 return 0;
3574
3575 mono_metadata_decode_row (tdef, loc.result, cols, MONO_CLASS_LAYOUT_SIZE);
3576 if (packing)
3577 *packing = cols [MONO_CLASS_LAYOUT_PACKING_SIZE];
3578 if (size)
3579 *size = cols [MONO_CLASS_LAYOUT_CLASS_SIZE];
3580
3581 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3582 return loc.result + 1;
3583 }
3584
3585 /*
3586 * mono_metadata_custom_attrs_from_index:
3587 * @meta: metadata context
3588 * @index: token representing the parent
3589 *
3590 * Returns: the 1-based index into the CustomAttribute table of the first
3591 * attribute which belongs to the metadata object described by @index.
3592 * Returns 0 if no such attribute is found.
3593 */
3594 guint32
3595 mono_metadata_custom_attrs_from_index (MonoImage *meta, guint32 index)
3596 {
3597 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_CUSTOMATTRIBUTE];
3598 locator_t loc;
3599
3600 if (!tdef->base)
3601 return 0;
3602
3603 loc.idx = index;
3604 loc.col_idx = MONO_CUSTOM_ATTR_PARENT;
3605 loc.t = tdef;
3606
3607 /* FIXME: Index translation */
3608
3609 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
3610 return 0;
3611
3612 /* Find the first entry by searching backwards */
3613 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_CUSTOM_ATTR_PARENT) == index))
3614 loc.result --;
3615
3616 /* loc_result is 0..1, needs to be mapped to table index (that is +1) */
3617 return loc.result + 1;
3618 }
3619
3620 /*
3621 * mono_metadata_declsec_from_index:
3622 * @meta: metadata context
3623 * @index: token representing the parent
3624 *
3625 * Returns: the 0-based index into the DeclarativeSecurity table of the first
3626 * attribute which belongs to the metadata object described by @index.
3627 * Returns -1 if no such attribute is found.
3628 */
3629 guint32
3630 mono_metadata_declsec_from_index (MonoImage *meta, guint32 index)
3631 {
3632 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_DECLSECURITY];
3633 locator_t loc;
3634
3635 if (!tdef->base)
3636 return -1;
3637
3638 loc.idx = index;
3639 loc.col_idx = MONO_DECL_SECURITY_PARENT;
3640 loc.t = tdef;
3641
3642 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, declsec_locator))
3643 return -1;
3644
3645 /* Find the first entry by searching backwards */
3646 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_DECL_SECURITY_PARENT) == index))
3647 loc.result --;
3648
3649 return loc.result;
3650 }
3651
3652 #ifdef DEBUG
3653 static void
3654 mono_backtrace (int limit)
3655 {
3656 void *array[limit];
3657 char **names;
3658 int i;
3659 backtrace (array, limit);
3660 names = backtrace_symbols (array, limit);
3661 for (i =0; i < limit; ++i) {
3662 g_print ("\t%s\n", names [i]);
3663 }
3664 g_free (names);
3665 }
3666 #endif
3667
3668 #ifndef __GNUC__
3669 /*#define __alignof__(a) sizeof(a)*/
3670 #define __alignof__(type) G_STRUCT_OFFSET(struct { char c; type x; }, x)
3671 #endif
3672
3673 /*
3674 * mono_type_size:
3675 * @t: the type to return the size of
3676 *
3677 * Returns: the number of bytes required to hold an instance of this
3678 * type in memory
3679 */
3680 int
3681 mono_type_size (MonoType *t, int *align)
3682 {
3683 if (!t) {
3684 *align = 1;
3685 return 0;
3686 }
3687 if (t->byref) {
3688 *align = __alignof__(gpointer);
3689 return sizeof (gpointer);
3690 }
3691
3692 switch (t->type){
3693 case MONO_TYPE_VOID:
3694 *align = 1;
3695 return 0;
3696 case MONO_TYPE_BOOLEAN:
3697 *align = __alignof__(gint8);
3698 return 1;
3699 case MONO_TYPE_I1:
3700 case MONO_TYPE_U1:
3701 *align = __alignof__(gint8);
3702 return 1;
3703 case MONO_TYPE_CHAR:
3704 case MONO_TYPE_I2:
3705 case MONO_TYPE_U2:
3706 *align = __alignof__(gint16);
3707 return 2;
3708 case MONO_TYPE_I4:
3709 case MONO_TYPE_U4:
3710 *align = __alignof__(gint32);
3711 return 4;
3712 case MONO_TYPE_R4:
3713 *align = __alignof__(float);
3714 return 4;
3715 case MONO_TYPE_I8:
3716 case MONO_TYPE_U8:
3717 *align = __alignof__(gint64);
3718 return 8;
3719 case MONO_TYPE_R8:
3720 *align = __alignof__(double);
3721 return 8;
3722 case MONO_TYPE_I:
3723 case MONO_TYPE_U:
3724 *align = __alignof__(gpointer);
3725 return sizeof (gpointer);
3726 case MONO_TYPE_STRING:
3727 *align = __alignof__(gpointer);
3728 return sizeof (gpointer);
3729 case MONO_TYPE_OBJECT:
3730 *align = __alignof__(gpointer);
3731 return sizeof (gpointer);
3732 case MONO_TYPE_VALUETYPE: {
3733 if (t->data.klass->enumtype)
3734 return mono_type_size (t->data.klass->enum_basetype, align);
3735 else
3736 return mono_class_value_size (t->data.klass, (guint32*)align);
3737 }
3738 case MONO_TYPE_CLASS:
3739 case MONO_TYPE_SZARRAY:
3740 case MONO_TYPE_PTR:
3741 case MONO_TYPE_FNPTR:
3742 case MONO_TYPE_ARRAY:
3743 *align = __alignof__(gpointer);
3744 return sizeof (gpointer);
3745 case MONO_TYPE_TYPEDBYREF:
3746 return mono_class_value_size (mono_defaults.typed_reference_class, (guint32*)align);
3747 case MONO_TYPE_GENERICINST: {
3748 MonoGenericClass *gclass = t->data.generic_class;
3749 MonoClass *container_class = gclass->container_class;
3750
3751 // g_assert (!gclass->inst->is_open);
3752
3753 if (container_class->valuetype) {
3754 if (container_class->enumtype)
3755 return mono_type_size (container_class->enum_basetype, align);
3756 else
3757 return mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
3758 } else {
3759 *align = __alignof__(gpointer);
3760 return sizeof (gpointer);
3761 }
3762 }
3763 case MONO_TYPE_VAR:
3764 case MONO_TYPE_MVAR:
3765 /* FIXME: Martin, this is wrong. */
3766 *align = __alignof__(gpointer);
3767 return sizeof (gpointer);
3768 default:
3769 g_error ("mono_type_size: type 0x%02x unknown", t->type);
3770 }
3771 return 0;
3772 }
3773
3774 /*
3775 * mono_type_stack_size:
3776 * @t: the type to return the size it uses on the stack
3777 *
3778 * Returns: the number of bytes required to hold an instance of this
3779 * type on the runtime stack
3780 */
3781 int
3782 mono_type_stack_size (MonoType *t, int *align)
3783 {
3784 return mono_type_stack_size_internal (t, align, FALSE);
3785 }
3786
3787 int
3788 mono_type_stack_size_internal (MonoType *t, int *align, gboolean allow_open)
3789 {
3790 int tmp;
3791 #if SIZEOF_VOID_P == SIZEOF_REGISTER
3792 int stack_slot_size = sizeof (gpointer);
3793 int stack_slot_align = __alignof__ (gpointer);
3794 #elif SIZEOF_VOID_P < SIZEOF_REGISTER
3795 int stack_slot_size = SIZEOF_REGISTER;
3796 int stack_slot_align = SIZEOF_REGISTER;
3797 #endif
3798
3799 g_assert (t != NULL);
3800
3801 if (!align)
3802 align = &tmp;
3803
3804 if (t->byref) {
3805 *align = stack_slot_align;
3806 return stack_slot_size;
3807 }
3808
3809 switch (t->type){
3810 case MONO_TYPE_BOOLEAN:
3811 case MONO_TYPE_CHAR:
3812 case MONO_TYPE_I1:
3813 case MONO_TYPE_U1:
3814 case MONO_TYPE_I2:
3815 case MONO_TYPE_U2:
3816 case MONO_TYPE_I4:
3817 case MONO_TYPE_U4:
3818 case MONO_TYPE_I:
3819 case MONO_TYPE_U:
3820 case MONO_TYPE_STRING:
3821 case MONO_TYPE_OBJECT:
3822 case MONO_TYPE_CLASS:
3823 case MONO_TYPE_SZARRAY:
3824 case MONO_TYPE_PTR:
3825 case MONO_TYPE_FNPTR:
3826 case MONO_TYPE_ARRAY:
3827 *align = stack_slot_align;
3828 return stack_slot_size;
3829 case MONO_TYPE_VAR:
3830 case MONO_TYPE_MVAR:
3831 g_assert (allow_open);
3832 *align = stack_slot_align;
3833 return stack_slot_size;
3834 case MONO_TYPE_TYPEDBYREF:
3835 *align = stack_slot_align;
3836 return stack_slot_size * 3;
3837 case MONO_TYPE_R4:
3838 *align = __alignof__(float);
3839 return sizeof (float);
3840 case MONO_TYPE_I8:
3841 case MONO_TYPE_U8:
3842 *align = __alignof__(gint64);
3843 return sizeof (gint64);
3844 case MONO_TYPE_R8:
3845 *align = __alignof__(double);
3846 return sizeof (double);
3847 case MONO_TYPE_VALUETYPE: {
3848 guint32 size;
3849
3850 if (t->data.klass->enumtype)
3851 return mono_type_stack_size_internal (t->data.klass->enum_basetype, align, allow_open);
3852 else {
3853 size = mono_class_value_size (t->data.klass, (guint32*)align);
3854
3855 *align = *align + stack_slot_align - 1;
3856 *align &= ~(stack_slot_align - 1);
3857
3858 size += stack_slot_size - 1;
3859 size &= ~(stack_slot_size - 1);
3860
3861 return size;
3862 }
3863 }
3864 case MONO_TYPE_GENERICINST: {
3865 MonoGenericClass *gclass = t->data.generic_class;
3866 MonoClass *container_class = gclass->container_class;
3867
3868 if (!allow_open)
3869 g_assert (!gclass->context.class_inst->is_open);
3870
3871 if (container_class->valuetype) {
3872 if (container_class->enumtype)
3873 return mono_type_stack_size_internal (container_class->enum_basetype, align, allow_open);
3874 else {
3875 guint32 size = mono_class_value_size (mono_class_from_mono_type (t), (guint32*)align);
3876
3877 *align = *align + stack_slot_align - 1;
3878 *align &= ~(stack_slot_align - 1);
3879
3880 size += stack_slot_size - 1;
3881 size &= ~(stack_slot_size - 1);
3882
3883 return size;
3884 }
3885 } else {
3886 *align = stack_slot_align;
3887 return stack_slot_size;
3888 }
3889 }
3890 default:
3891 g_error ("type 0x%02x unknown", t->type);
3892 }
3893 return 0;
3894 }
3895
3896 gboolean
3897 mono_type_generic_inst_is_valuetype (MonoType *type)
3898 {
3899 g_assert (type->type == MONO_TYPE_GENERICINST);
3900 return type->data.generic_class->container_class->valuetype;
3901 }
3902
3903 gboolean
3904 mono_metadata_generic_class_is_valuetype (MonoGenericClass *gclass)
3905 {
3906 return gclass->container_class->valuetype;
3907 }
3908
3909 static gboolean
3910 _mono_metadata_generic_class_equal (const MonoGenericClass *g1, const MonoGenericClass *g2, gboolean signature_only)
3911 {
3912 MonoGenericInst *i1 = g1->context.class_inst;
3913 MonoGenericInst *i2 = g2->context.class_inst;
3914
3915 if (g1->is_dynamic != g2->is_dynamic)
3916 return FALSE;
3917 if (!mono_metadata_class_equal (g1->container_class, g2->container_class, signature_only))
3918 return FALSE;
3919 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
3920 return FALSE;
3921 return g1->is_tb_open == g2->is_tb_open;
3922 }
3923
3924 static gboolean
3925 _mono_metadata_generic_class_container_equal (const MonoGenericClass *g1, MonoClass *c2, gboolean signature_only)
3926 {
3927 MonoGenericInst *i1 = g1->context.class_inst;
3928 MonoGenericInst *i2 = c2->generic_container->context.class_inst;
3929
3930 if (!mono_metadata_class_equal (g1->container_class, c2, signature_only))
3931 return FALSE;
3932 if (!mono_generic_inst_equal_full (i1, i2, signature_only))
3933 return FALSE;
3934 return !g1->is_tb_open;
3935 }
3936
3937 guint
3938 mono_metadata_generic_context_hash (const MonoGenericContext *context)
3939 {
3940 /* FIXME: check if this seed is good enough */
3941 guint hash = 0xc01dfee7;
3942 if (context->class_inst)
3943 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->class_inst);
3944 if (context->method_inst)
3945 hash = ((hash << 5) - hash) ^ mono_metadata_generic_inst_hash (context->method_inst);
3946 return hash;
3947 }
3948
3949 gboolean
3950 mono_metadata_generic_context_equal (const MonoGenericContext *g1, const MonoGenericContext *g2)
3951 {
3952 return g1->class_inst == g2->class_inst && g1->method_inst == g2->method_inst;
3953 }
3954
3955 /*
3956 * mono_metadata_type_hash:
3957 * @t1: a type
3958 *
3959 * Computes an hash value for @t1 to be used in GHashTable.
3960 */
3961 guint
3962 mono_metadata_type_hash (MonoType *t1)
3963 {
3964 guint hash = t1->type;
3965
3966 hash |= t1->byref << 6; /* do not collide with t1->type values */
3967 switch (t1->type) {
3968 case MONO_TYPE_VALUETYPE:
3969 case MONO_TYPE_CLASS:
3970 case MONO_TYPE_SZARRAY:
3971 /* check if the distribution is good enough */
3972 return ((hash << 5) - hash) ^ g_str_hash (t1->data.klass->name);
3973 case MONO_TYPE_PTR:
3974 return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
3975 case MONO_TYPE_ARRAY:
3976 return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
3977 case MONO_TYPE_GENERICINST:
3978 return ((hash << 5) - hash) ^ mono_generic_class_hash (t1->data.generic_class);
3979 }
3980 return hash;
3981 }
3982
3983 static gboolean
3984 mono_metadata_generic_param_equal (MonoGenericParam *p1, MonoGenericParam *p2, gboolean signature_only)
3985 {
3986 if (p1 == p2)
3987 return TRUE;
3988 if (p1->num != p2->num)
3989 return FALSE;
3990
3991 if (p1->owner == p2->owner && p1->image == p2->image)
3992 return TRUE;
3993
3994 /*
3995 * If `signature_only' is true, we're comparing two (method) signatures.
3996 * In this case, the owner of two type parameters doesn't need to match.
3997 */
3998
3999 return signature_only;
4000 }
4001
4002 static gboolean
4003 mono_metadata_class_equal (MonoClass *c1, MonoClass *c2, gboolean signature_only)
4004 {
4005 if (c1 == c2)
4006 return TRUE;
4007 if (c1->generic_class && c2->generic_class)
4008 return _mono_metadata_generic_class_equal (c1->generic_class, c2->generic_class, signature_only);
4009 if (c1->generic_class && c2->generic_container)
4010 return _mono_metadata_generic_class_container_equal (c1->generic_class, c2, signature_only);
4011 if (c1->generic_container && c2->generic_class)
4012 return _mono_metadata_generic_class_container_equal (c2->generic_class, c1, signature_only);
4013 if ((c1->byval_arg.type == MONO_TYPE_VAR) && (c2->byval_arg.type == MONO_TYPE_VAR))
4014 return mono_metadata_generic_param_equal (
4015 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4016 if ((c1->byval_arg.type == MONO_TYPE_MVAR) && (c2->byval_arg.type == MONO_TYPE_MVAR))
4017 return mono_metadata_generic_param_equal (
4018 c1->byval_arg.data.generic_param, c2->byval_arg.data.generic_param, signature_only);
4019 if (signature_only &&
4020 (c1->byval_arg.type == MONO_TYPE_SZARRAY) && (c2->byval_arg.type == MONO_TYPE_SZARRAY))
4021 return mono_metadata_class_equal (c1->byval_arg.data.klass, c2->byval_arg.data.klass, signature_only);
4022 return FALSE;
4023 }
4024
4025 static gboolean
4026 mono_metadata_fnptr_equal (MonoMethodSignature *s1, MonoMethodSignature *s2, gboolean signature_only)
4027 {
4028 gpointer iter1 = 0, iter2 = 0;
4029
4030 if (s1 == s2)
4031 return TRUE;
4032 if (s1->call_convention != s2->call_convention)
4033 return FALSE;
4034 if (s1->sentinelpos != s2->sentinelpos)
4035 return FALSE;
4036 if (s1->hasthis != s2->hasthis)
4037 return FALSE;
4038 if (s1->explicit_this != s2->explicit_this)
4039 return FALSE;
4040 if (! do_mono_metadata_type_equal (s1->ret, s2->ret, signature_only))
4041 return FALSE;
4042 if (s1->param_count != s2->param_count)
4043 return FALSE;
4044
4045 while (TRUE) {
4046 MonoType *t1 = mono_signature_get_params (s1, &iter1);
4047 MonoType *t2 = mono_signature_get_params (s2, &iter2);
4048
4049 if (t1 == NULL || t2 == NULL)
4050 return (t1 == t2);
4051 if (! do_mono_metadata_type_equal (t1, t2, signature_only))
4052 return FALSE;
4053 }
4054 }
4055
4056 /*
4057 * mono_metadata_type_equal:
4058 * @t1: a type
4059 * @t2: another type
4060 *
4061 * Determine if @t1 and @t2 represent the same type.
4062 * Returns: #TRUE if @t1 and @t2 are equal.
4063 */
4064 static gboolean
4065 do_mono_metadata_type_equal (MonoType *t1, MonoType *t2, gboolean signature_only)
4066 {
4067 if (t1->type != t2->type || t1->byref != t2->byref)
4068 return FALSE;
4069
4070 switch (t1->type) {
4071 case MONO_TYPE_VOID:
4072 case MONO_TYPE_BOOLEAN:
4073 case MONO_TYPE_CHAR:
4074 case MONO_TYPE_I1:
4075 case MONO_TYPE_U1:
4076 case MONO_TYPE_I2:
4077 case MONO_TYPE_U2:
4078 case MONO_TYPE_I4:
4079 case MONO_TYPE_U4:
4080 case MONO_TYPE_I8:
4081 case MONO_TYPE_U8:
4082 case MONO_TYPE_R4:
4083 case MONO_TYPE_R8:
4084 case MONO_TYPE_STRING:
4085 case MONO_TYPE_I:
4086 case MONO_TYPE_U:
4087 case MONO_TYPE_OBJECT:
4088 case MONO_TYPE_TYPEDBYREF:
4089 return TRUE;
4090 case MONO_TYPE_VALUETYPE:
4091 case MONO_TYPE_CLASS:
4092 case MONO_TYPE_SZARRAY:
4093 return mono_metadata_class_equal (t1->data.klass, t2->data.klass, signature_only);
4094 case MONO_TYPE_PTR:
4095 return do_mono_metadata_type_equal (t1->data.type, t2->data.type, signature_only);
4096 case MONO_TYPE_ARRAY:
4097 if (t1->data.array->rank != t2->data.array->rank)
4098 return FALSE;
4099 return mono_metadata_class_equal (t1->data.array->eklass, t2->data.array->eklass, signature_only);
4100 case MONO_TYPE_GENERICINST:
4101 return _mono_metadata_generic_class_equal (
4102 t1->data.generic_class, t2->data.generic_class, signature_only);
4103 case MONO_TYPE_VAR:
4104 return mono_metadata_generic_param_equal (
4105 t1->data.generic_param, t2->data.generic_param, signature_only);
4106 case MONO_TYPE_MVAR:
4107 return mono_metadata_generic_param_equal (
4108 t1->data.generic_param, t2->data.generic_param, signature_only);
4109 case MONO_TYPE_FNPTR:
4110 return mono_metadata_fnptr_equal (t1->data.method, t2->data.method, signature_only);
4111 default:
4112 g_error ("implement type compare for %0x!", t1->type);
4113 return FALSE;
4114 }
4115
4116 return FALSE;
4117 }
4118
4119 gboolean
4120 mono_metadata_type_equal (MonoType *t1, MonoType *t2)
4121 {
4122 return do_mono_metadata_type_equal (t1, t2, FALSE);
4123 }
4124
4125 /**
4126 * mono_metadata_type_equal_full:
4127 * @t1: a type
4128 * @t2: another type
4129 * @signature_only: if signature only comparison should be made
4130 *
4131 * Determine if @t1 and @t2 are signature compatible if @signature_only is #TRUE, otherwise
4132 * behaves the same way as mono_metadata_type_equal.
4133 * The function mono_metadata_type_equal(a, b) is just a shortcut for mono_metadata_type_equal_full(a, b, FALSE).
4134 * Returns: #TRUE if @t1 and @t2 are equal taking @signature_only into account.
4135 */
4136 gboolean
4137 mono_metadata_type_equal_full (MonoType *t1, MonoType *t2, gboolean signature_only)
4138 {
4139 return do_mono_metadata_type_equal (t1, t2, signature_only);
4140 }
4141
4142 /**
4143 * mono_metadata_signature_equal:
4144 * @sig1: a signature
4145 * @sig2: another signature
4146 *
4147 * Determine if @sig1 and @sig2 represent the same signature, with the
4148 * same number of arguments and the same types.
4149 * Returns: #TRUE if @sig1 and @sig2 are equal.
4150 */
4151 gboolean
4152 mono_metadata_signature_equal (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
4153 {
4154 int i;
4155
4156 if (sig1->hasthis != sig2->hasthis || sig1->param_count != sig2->param_count)
4157 return FALSE;
4158
4159 if (sig1->generic_param_count != sig2->generic_param_count)
4160 return FALSE;
4161
4162 /*
4163 * We're just comparing the signatures of two methods here:
4164 *
4165 * If we have two generic methods `void Foo<U> (U u)' and `void Bar<V> (V v)',
4166 * U and V are equal here.
4167 *
4168 * That's what the `signature_only' argument of do_mono_metadata_type_equal() is for.
4169 */
4170
4171 for (i = 0; i < sig1->param_count; i++) {
4172 MonoType *p1 = sig1->params[i];
4173 MonoType *p2 = sig2->params[i];
4174
4175 /* if (p1->attrs != p2->attrs)
4176 return FALSE;
4177 */
4178 if (!do_mono_metadata_type_equal (p1, p2, TRUE))
4179 return FALSE;
4180 }
4181
4182 if (!do_mono_metadata_type_equal (sig1->ret, sig2->ret, TRUE))
4183 return FALSE;
4184 return TRUE;
4185 }
4186
4187 /**
4188 * mono_metadata_type_dup:
4189 * @mp: mempool to use
4190 * @original: type to duplicate
4191 *
4192 * Returns: copy of type allocated from mempool (or from the heap, if @mp is null).
4193 */
4194 MonoType *
4195 mono_metadata_type_dup (MonoMemPool *mp, const MonoType *o)
4196 {
4197 MonoType *r = NULL;
4198 int sizeof_o = sizeof (MonoType);
4199 if (o->num_mods)
4200 sizeof_o += (o->num_mods - MONO_ZERO_LEN_ARRAY) * sizeof (MonoCustomMod);
4201
4202 mono_loader_lock ();
4203 r = mp ? mono_mempool_alloc0 (mp, sizeof_o) : g_malloc (sizeof_o);
4204 mono_loader_unlock ();
4205
4206 memcpy (r, o, sizeof_o);
4207
4208 if (o->type == MONO_TYPE_PTR) {
4209 r->data.type = mono_metadata_type_dup (mp, o->data.type);
4210 } else if (o->type == MONO_TYPE_ARRAY) {
4211 r->data.array = mono_dup_array_type (mp, o->data.array);
4212 } else if (o->type == MONO_TYPE_FNPTR) {
4213 /*FIXME the dup'ed signature is leaked mono_metadata_free_type*/
4214 r->data.method = mono_metadata_signature_deep_dup (mp, o->data.method);
4215 }
4216 return r;
4217 }
4218
4219 guint
4220 mono_signature_hash (MonoMethodSignature *sig)
4221 {
4222 guint i, res = sig->ret->type;
4223
4224 for (i = 0; i < sig->param_count; i++)
4225 res = (res << 5) - res + mono_type_hash (sig->params[i]);
4226
4227 return res;
4228 }
4229
4230 /*
4231 * mono_metadata_encode_value:
4232 * @value: value to encode
4233 * @buf: buffer where to write the compressed representation
4234 * @endbuf: pointer updated to point at the end of the encoded output
4235 *
4236 * Encodes the value @value in the compressed representation used
4237 * in metadata and stores the result in @buf. @buf needs to be big
4238 * enough to hold the data (4 bytes).
4239 */
4240 void
4241 mono_metadata_encode_value (guint32 value, char *buf, char **endbuf)
4242 {
4243 char *p = buf;
4244
4245 if (value < 0x80)
4246 *p++ = value;
4247 else if (value < 0x4000) {
4248 p [0] = 0x80 | (value >> 8);
4249 p [1] = value & 0xff;
4250 p += 2;
4251 } else {
4252 p [0] = (value >> 24) | 0xc0;
4253 p [1] = (value >> 16) & 0xff;
4254 p [2] = (value >> 8) & 0xff;
4255 p [3] = value & 0xff;
4256 p += 4;
4257 }
4258 if (endbuf)
4259 *endbuf = p;
4260 }
4261
4262 /*
4263 * mono_metadata_field_info:
4264 * @meta: the Image the field is defined in
4265 * @index: the index in the field table representing the field
4266 * @offset: a pointer to an integer where to store the offset that
4267 * may have been specified for the field in a FieldLayout table
4268 * @rva: a pointer to the RVA of the field data in the image that
4269 * may have been defined in a FieldRVA table
4270 * @marshal_spec: a pointer to the marshal spec that may have been
4271 * defined for the field in a FieldMarshal table.
4272 *
4273 * Gather info for field @index that may have been defined in the FieldLayout,
4274 * FieldRVA and FieldMarshal tables.
4275 * Either of offset, rva and marshal_spec can be NULL if you're not interested
4276 * in the data.
4277 */
4278 void
4279 mono_metadata_field_info (MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
4280 MonoMarshalSpec **marshal_spec)
4281 {
4282 return mono_metadata_field_info_with_mempool (NULL, meta, index, offset, rva, marshal_spec);
4283 }
4284
4285 void
4286 mono_metadata_field_info_with_mempool (MonoMemPool *mempool, MonoImage *meta, guint32 index, guint32 *offset, guint32 *rva,
4287 MonoMarshalSpec **marshal_spec)
4288 {
4289 MonoTableInfo *tdef;
4290 locator_t loc;
4291
4292 loc.idx = index + 1;
4293 if (meta->uncompressed_metadata)
4294 loc.idx = search_ptr_table (meta, MONO_TABLE_FIELD_POINTER, loc.idx);
4295
4296 if (offset) {
4297 tdef = &meta->tables [MONO_TABLE_FIELDLAYOUT];
4298
4299 loc.col_idx = MONO_FIELD_LAYOUT_FIELD;
4300 loc.t = tdef;
4301
4302 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
4303 *offset = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_LAYOUT_OFFSET);
4304 } else {
4305 *offset = (guint32)-1;
4306 }
4307 }
4308 if (rva) {
4309 tdef = &meta->tables [MONO_TABLE_FIELDRVA];
4310
4311 loc.col_idx = MONO_FIELD_RVA_FIELD;
4312 loc.t = tdef;
4313
4314 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
4315 /*
4316 * LAMESPEC: There is no signature, no nothing, just the raw data.
4317 */
4318 *rva = mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_RVA_RVA);
4319 } else {
4320 *rva = 0;
4321 }
4322 }
4323 if (marshal_spec) {
4324 const char *p;
4325
4326 if ((p = mono_metadata_get_marshal_info (meta, index, TRUE))) {
4327 *marshal_spec = mono_metadata_parse_marshal_spec_with_mempool (mempool, p);
4328 }
4329 }
4330
4331 }
4332
4333 /*
4334 * mono_metadata_get_constant_index:
4335 * @meta: the Image the field is defined in
4336 * @index: the token that may have a row defined in the constants table
4337 * @hint: possible position for the row
4338 *
4339 * @token must be a FieldDef, ParamDef or PropertyDef token.
4340 *
4341 * Returns: the index into the Constants table or 0 if not found.
4342 */
4343 guint32
4344 mono_metadata_get_constant_index (MonoImage *meta, guint32 token, guint32 hint)
4345 {
4346 MonoTableInfo *tdef;
4347 locator_t loc;
4348 guint32 index = mono_metadata_token_index (token);
4349
4350 tdef = &meta->tables [MONO_TABLE_CONSTANT];
4351 index <<= MONO_HASCONSTANT_BITS;
4352 switch (mono_metadata_token_table (token)) {
4353 case MONO_TABLE_FIELD:
4354 index |= MONO_HASCONSTANT_FIEDDEF;
4355 break;
4356 case MONO_TABLE_PARAM:
4357 index |= MONO_HASCONSTANT_PARAM;
4358 break;
4359 case MONO_TABLE_PROPERTY:
4360 index |= MONO_HASCONSTANT_PROPERTY;
4361 break;
4362 default:
4363 g_warning ("Not a valid token for the constant table: 0x%08x", token);
4364 return 0;
4365 }
4366 loc.idx = index;
4367 loc.col_idx = MONO_CONSTANT_PARENT;
4368 loc.t = tdef;
4369
4370 /* FIXME: Index translation */
4371
4372 if ((hint > 0) && (hint < tdef->rows) && (mono_metadata_decode_row_col (tdef, hint - 1, MONO_CONSTANT_PARENT) == index))
4373 return hint;
4374
4375 if (tdef->base && bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator)) {
4376 return loc.result + 1;
4377 }
4378 return 0;
4379 }
4380
4381 /*
4382 * mono_metadata_events_from_typedef:
4383 * @meta: metadata context
4384 * @index: 0-based index (in the TypeDef table) describing a type
4385 *
4386 * Returns: the 0-based index in the Event table for the events in the
4387 * type. The last event that belongs to the type (plus 1) is stored
4388 * in the @end_idx pointer.
4389 */
4390 guint32
4391 mono_metadata_events_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
4392 {
4393 locator_t loc;
4394 guint32 start, end;
4395 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_EVENTMAP];
4396
4397 *end_idx = 0;
4398
4399 if (!tdef->base)
4400 return 0;
4401
4402 loc.t = tdef;
4403 loc.col_idx = MONO_EVENT_MAP_PARENT;
4404 loc.idx = index + 1;
4405
4406 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4407 return 0;
4408
4409 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_EVENT_MAP_EVENTLIST);
4410 if (loc.result + 1 < tdef->rows) {
4411 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_EVENT_MAP_EVENTLIST) - 1;
4412 } else {
4413 end = meta->tables [MONO_TABLE_EVENT].rows;
4414 }
4415
4416 *end_idx = end;
4417 return start - 1;
4418 }
4419
4420 /*
4421 * mono_metadata_methods_from_event:
4422 * @meta: metadata context
4423 * @index: 0-based index (in the Event table) describing a event
4424 *
4425 * Returns: the 0-based index in the MethodDef table for the methods in the
4426 * event. The last method that belongs to the event (plus 1) is stored
4427 * in the @end_idx pointer.
4428 */
4429 guint32
4430 mono_metadata_methods_from_event (MonoImage *meta, guint32 index, guint *end_idx)
4431 {
4432 locator_t loc;
4433 guint start, end;
4434 guint32 cols [MONO_METHOD_SEMA_SIZE];
4435 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
4436
4437 *end_idx = 0;
4438 if (!msemt->base)
4439 return 0;
4440
4441 if (meta->uncompressed_metadata)
4442 index = search_ptr_table (meta, MONO_TABLE_EVENT_POINTER, index + 1) - 1;
4443
4444 loc.t = msemt;
4445 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
4446 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_EVENT; /* Method association coded index */
4447
4448 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
4449 return 0;
4450
4451 start = loc.result;
4452 /*
4453 * We may end up in the middle of the rows...
4454 */
4455 while (start > 0) {
4456 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
4457 start--;
4458 else
4459 break;
4460 }
4461 end = start + 1;
4462 while (end < msemt->rows) {
4463 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
4464 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
4465 break;
4466 ++end;
4467 }
4468 *end_idx = end;
4469 return start;
4470 }
4471
4472 /*
4473 * mono_metadata_properties_from_typedef:
4474 * @meta: metadata context
4475 * @index: 0-based index (in the TypeDef table) describing a type
4476 *
4477 * Returns: the 0-based index in the Property table for the properties in the
4478 * type. The last property that belongs to the type (plus 1) is stored
4479 * in the @end_idx pointer.
4480 */
4481 guint32
4482 mono_metadata_properties_from_typedef (MonoImage *meta, guint32 index, guint *end_idx)
4483 {
4484 locator_t loc;
4485 guint32 start, end;
4486 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_PROPERTYMAP];
4487
4488 *end_idx = 0;
4489
4490 if (!tdef->base)
4491 return 0;
4492
4493 loc.t = tdef;
4494 loc.col_idx = MONO_PROPERTY_MAP_PARENT;
4495 loc.idx = index + 1;
4496
4497 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4498 return 0;
4499
4500 start = mono_metadata_decode_row_col (tdef, loc.result, MONO_PROPERTY_MAP_PROPERTY_LIST);
4501 if (loc.result + 1 < tdef->rows) {
4502 end = mono_metadata_decode_row_col (tdef, loc.result + 1, MONO_PROPERTY_MAP_PROPERTY_LIST) - 1;
4503 } else {
4504 end = meta->tables [MONO_TABLE_PROPERTY].rows;
4505 }
4506
4507 *end_idx = end;
4508 return start - 1;
4509 }
4510
4511 /*
4512 * mono_metadata_methods_from_property:
4513 * @meta: metadata context
4514 * @index: 0-based index (in the PropertyDef table) describing a property
4515 *
4516 * Returns: the 0-based index in the MethodDef table for the methods in the
4517 * property. The last method that belongs to the property (plus 1) is stored
4518 * in the @end_idx pointer.
4519 */
4520 guint32
4521 mono_metadata_methods_from_property (MonoImage *meta, guint32 index, guint *end_idx)
4522 {
4523 locator_t loc;
4524 guint start, end;
4525 guint32 cols [MONO_METHOD_SEMA_SIZE];
4526 MonoTableInfo *msemt = &meta->tables [MONO_TABLE_METHODSEMANTICS];
4527
4528 *end_idx = 0;
4529 if (!msemt->base)
4530 return 0;
4531
4532 if (meta->uncompressed_metadata)
4533 index = search_ptr_table (meta, MONO_TABLE_PROPERTY_POINTER, index + 1) - 1;
4534
4535 loc.t = msemt;
4536 loc.col_idx = MONO_METHOD_SEMA_ASSOCIATION;
4537 loc.idx = ((index + 1) << MONO_HAS_SEMANTICS_BITS) | MONO_HAS_SEMANTICS_PROPERTY; /* Method association coded index */
4538
4539 if (!bsearch (&loc, msemt->base, msemt->rows, msemt->row_size, table_locator))
4540 return 0;
4541
4542 start = loc.result;
4543 /*
4544 * We may end up in the middle of the rows...
4545 */
4546 while (start > 0) {
4547 if (loc.idx == mono_metadata_decode_row_col (msemt, start - 1, MONO_METHOD_SEMA_ASSOCIATION))
4548 start--;
4549 else
4550 break;
4551 }
4552 end = start + 1;
4553 while (end < msemt->rows) {
4554 mono_metadata_decode_row (msemt, end, cols, MONO_METHOD_SEMA_SIZE);
4555 if (cols [MONO_METHOD_SEMA_ASSOCIATION] != loc.idx)
4556 break;
4557 ++end;
4558 }
4559 *end_idx = end;
4560 return start;
4561 }
4562
4563 guint32
4564 mono_metadata_implmap_from_method (MonoImage *meta, guint32 method_idx)
4565 {
4566 locator_t loc;
4567 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_IMPLMAP];
4568
4569 if (!tdef->base)
4570 return 0;
4571
4572 /* No index translation seems to be needed */
4573
4574 loc.t = tdef;
4575 loc.col_idx = MONO_IMPLMAP_MEMBER;
4576 loc.idx = ((method_idx + 1) << MONO_MEMBERFORWD_BITS) | MONO_MEMBERFORWD_METHODDEF;
4577
4578 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4579 return 0;
4580
4581 return loc.result + 1;
4582 }
4583
4584 /**
4585 * @image: context where the image is created
4586 * @type_spec: typespec token
4587 *
4588 * Creates a MonoType representing the TypeSpec indexed by the @type_spec
4589 * token.
4590 */
4591 MonoType *
4592 mono_type_create_from_typespec (MonoImage *image, guint32 type_spec)
4593 {
4594 guint32 idx = mono_metadata_token_index (type_spec);
4595 MonoTableInfo *t;
4596 guint32 cols [MONO_TYPESPEC_SIZE];
4597 const char *ptr;
4598 guint32 len;
4599 MonoType *type, *type2;
4600
4601 mono_loader_lock ();
4602
4603 type = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4604 if (type) {
4605 mono_loader_unlock ();
4606 return type;
4607 }
4608
4609 t = &image->tables [MONO_TABLE_TYPESPEC];
4610
4611 mono_metadata_decode_row (t, idx-1, cols, MONO_TYPESPEC_SIZE);
4612 ptr = mono_metadata_blob_heap (image, cols [MONO_TYPESPEC_SIGNATURE]);
4613 len = mono_metadata_decode_value (ptr, &ptr);
4614
4615 type = mono_image_alloc0 (image, sizeof (MonoType));
4616
4617 if (*ptr == MONO_TYPE_BYREF) {
4618 type->byref = 1;
4619 ptr++;
4620 }
4621
4622 if (!do_mono_metadata_parse_type (type, image, NULL, ptr, &ptr)) {
4623 mono_loader_unlock ();
4624 return NULL;
4625 }
4626
4627 type2 = g_hash_table_lookup (image->typespec_cache, GUINT_TO_POINTER (type_spec));
4628
4629 if (type2) {
4630 mono_loader_unlock ();
4631 return type2;
4632 }
4633
4634 g_hash_table_insert (image->typespec_cache, GUINT_TO_POINTER (type_spec), type);
4635
4636 mono_loader_unlock ();
4637
4638 return type;
4639 }
4640
4641
4642 static char*
4643 mono_mempool_strndup (MonoMemPool *mp, const char *data, guint len)
4644 {
4645 char *res;
4646 if (!mp)
4647 return g_strndup (data, len);
4648 res = mono_mempool_alloc (mp, len + 1);
4649 memcpy (res, data, len);
4650 res [len] = 0;
4651 return res;
4652 }
4653
4654 MonoMarshalSpec *
4655 mono_metadata_parse_marshal_spec (MonoImage *image, const char *ptr)
4656 {
4657 return mono_metadata_parse_marshal_spec_with_mempool (NULL, ptr);
4658 }
4659
4660 MonoMarshalSpec *
4661 mono_metadata_parse_marshal_spec_with_mempool (MonoMemPool *mempool, const char *ptr)
4662 {
4663 MonoMarshalSpec *res;
4664 int len;
4665 const char *start = ptr;
4666
4667 /* fixme: this is incomplete, but I cant find more infos in the specs */
4668
4669 if (mempool)
4670 res = mono_mempool_alloc0 (mempool, sizeof (MonoMarshalSpec));
4671 else
4672 res = g_new0 (MonoMarshalSpec, 1);
4673
4674 len = mono_metadata_decode_value (ptr, &ptr);
4675 res->native = *ptr++;
4676
4677 if (res->native == MONO_NATIVE_LPARRAY) {
4678 res->data.array_data.param_num = -1;
4679 res->data.array_data.num_elem = -1;
4680 res->data.array_data.elem_mult = -1;
4681
4682 if (ptr - start <= len)
4683 res->data.array_data.elem_type = *ptr++;
4684 if (ptr - start <= len)
4685 res->data.array_data.param_num = mono_metadata_decode_value (ptr, &ptr);
4686 if (ptr - start <= len)
4687 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4688 if (ptr - start <= len) {
4689 /*
4690 * LAMESPEC: Older spec versions say this parameter comes before
4691 * num_elem. Never spec versions don't talk about elem_mult at
4692 * all, but csc still emits it, and it is used to distinguish
4693 * between param_num being 0, and param_num being omitted.
4694 * So if (param_num == 0) && (num_elem > 0), then
4695 * elem_mult == 0 -> the array size is num_elem
4696 * elem_mult == 1 -> the array size is @param_num + num_elem
4697 */
4698 res->data.array_data.elem_mult = mono_metadata_decode_value (ptr, &ptr);
4699 }
4700 }
4701
4702 if (res->native == MONO_NATIVE_BYVALTSTR) {
4703 if (ptr - start <= len)
4704 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4705 }
4706
4707 if (res->native == MONO_NATIVE_BYVALARRAY) {
4708 if (ptr - start <= len)
4709 res->data.array_data.num_elem = mono_metadata_decode_value (ptr, &ptr);
4710 }
4711
4712 if (res->native == MONO_NATIVE_CUSTOM) {
4713 /* skip unused type guid */
4714 len = mono_metadata_decode_value (ptr, &ptr);
4715 ptr += len;
4716 /* skip unused native type name */
4717 len = mono_metadata_decode_value (ptr, &ptr);
4718 ptr += len;
4719 /* read custom marshaler type name */
4720 len = mono_metadata_decode_value (ptr, &ptr);
4721 res->data.custom_data.custom_name = mono_mempool_strndup (mempool, ptr, len);
4722 ptr += len;
4723 /* read cookie string */
4724 len = mono_metadata_decode_value (ptr, &ptr);
4725 res->data.custom_data.cookie = mono_mempool_strndup (mempool, ptr, len);
4726 }
4727
4728 if (res->native == MONO_NATIVE_SAFEARRAY) {
4729 res->data.safearray_data.elem_type = 0;
4730 res->data.safearray_data.num_elem = 0;
4731 if (ptr - start <= len)
4732 res->data.safearray_data.elem_type = *ptr++;
4733 if (ptr - start <= len)
4734 res->data.safearray_data.num_elem = *ptr++;
4735 }
4736 return res;
4737 }
4738
4739 void
4740 mono_metadata_free_marshal_spec (MonoMarshalSpec *spec)
4741 {
4742 if (spec->native == MONO_NATIVE_CUSTOM) {
4743 g_free (spec->data.custom_data.custom_name);
4744 g_free (spec->data.custom_data.cookie);
4745 }
4746 g_free (spec);
4747 }
4748
4749 /**
4750 * mono_type_to_unmanaged:
4751 *
4752 * Returns: A MonoMarshalNative enumeration value (MONO_NATIVE_) value
4753 * describing the underlying native reprensetation of the type.
4754 *
4755 * In addition the value pointed by
4756 * "conv" will contain the kind of marshalling required for this
4757 * particular type one of the MONO_MARSHAL_CONV_ enumeration values.
4758 */
4759 guint32
4760 mono_type_to_unmanaged (MonoType *type, MonoMarshalSpec *mspec, gboolean as_field,
4761 gboolean unicode, MonoMarshalConv *conv)
4762 {
4763 MonoMarshalConv dummy_conv;
4764 int t = type->type;
4765
4766 if (!conv)
4767 conv = &dummy_conv;
4768
4769 *conv = MONO_MARSHAL_CONV_NONE;
4770
4771 if (type->byref)
4772 return MONO_NATIVE_UINT;
4773
4774 handle_enum:
4775 switch (t) {
4776 case MONO_TYPE_BOOLEAN:
4777 if (mspec) {
4778 switch (mspec->native) {
4779 case MONO_NATIVE_VARIANTBOOL:
4780 *conv = MONO_MARSHAL_CONV_BOOL_VARIANTBOOL;
4781 return MONO_NATIVE_VARIANTBOOL;
4782 case MONO_NATIVE_BOOLEAN:
4783 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4784 return MONO_NATIVE_BOOLEAN;
4785 case MONO_NATIVE_I1:
4786 case MONO_NATIVE_U1:
4787 return mspec->native;
4788 default:
4789 g_error ("cant marshal bool to native type %02x", mspec->native);
4790 }
4791 }
4792 *conv = MONO_MARSHAL_CONV_BOOL_I4;
4793 return MONO_NATIVE_BOOLEAN;
4794 case MONO_TYPE_CHAR: return MONO_NATIVE_U2;
4795 case MONO_TYPE_I1: return MONO_NATIVE_I1;
4796 case MONO_TYPE_U1: return MONO_NATIVE_U1;
4797 case MONO_TYPE_I2: return MONO_NATIVE_I2;
4798 case MONO_TYPE_U2: return MONO_NATIVE_U2;
4799 case MONO_TYPE_I4: return MONO_NATIVE_I4;
4800 case MONO_TYPE_U4: return MONO_NATIVE_U4;
4801 case MONO_TYPE_I8: return MONO_NATIVE_I8;
4802 case MONO_TYPE_U8: return MONO_NATIVE_U8;
4803 case MONO_TYPE_R4: return MONO_NATIVE_R4;
4804 case MONO_TYPE_R8: return MONO_NATIVE_R8;
4805 case MONO_TYPE_STRING:
4806 if (mspec) {
4807 switch (mspec->native) {
4808 case MONO_NATIVE_BSTR:
4809 *conv = MONO_MARSHAL_CONV_STR_BSTR;
4810 return MONO_NATIVE_BSTR;
4811 case MONO_NATIVE_LPSTR:
4812 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
4813 return MONO_NATIVE_LPSTR;
4814 case MONO_NATIVE_LPWSTR:
4815 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
4816 return MONO_NATIVE_LPWSTR;
4817 case MONO_NATIVE_LPTSTR:
4818 *conv = MONO_MARSHAL_CONV_STR_LPTSTR;
4819 return MONO_NATIVE_LPTSTR;
4820 case MONO_NATIVE_ANSIBSTR:
4821 *conv = MONO_MARSHAL_CONV_STR_ANSIBSTR;
4822 return MONO_NATIVE_ANSIBSTR;
4823 case MONO_NATIVE_TBSTR:
4824 *conv = MONO_MARSHAL_CONV_STR_TBSTR;
4825 return MONO_NATIVE_TBSTR;
4826 case MONO_NATIVE_BYVALTSTR:
4827 if (unicode)
4828 *conv = MONO_MARSHAL_CONV_STR_BYVALWSTR;
4829 else
4830 *conv = MONO_MARSHAL_CONV_STR_BYVALSTR;
4831 return MONO_NATIVE_BYVALTSTR;
4832 default:
4833 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);
4834 }
4835 }
4836 if (unicode) {
4837 *conv = MONO_MARSHAL_CONV_STR_LPWSTR;
4838 return MONO_NATIVE_LPWSTR;
4839 }
4840 else {
4841 *conv = MONO_MARSHAL_CONV_STR_LPSTR;
4842 return MONO_NATIVE_LPSTR;
4843 }
4844 case MONO_TYPE_PTR: return MONO_NATIVE_UINT;
4845 case MONO_TYPE_VALUETYPE: /*FIXME*/
4846 if (type->data.klass->enumtype) {
4847 t = type->data.klass->enum_basetype->type;
4848 goto handle_enum;
4849 }
4850 if (type->data.klass == mono_defaults.handleref_class){
4851 *conv = MONO_MARSHAL_CONV_HANDLEREF;
4852 return MONO_NATIVE_INT;
4853 }
4854 return MONO_NATIVE_STRUCT;
4855 case MONO_TYPE_SZARRAY:
4856 case MONO_TYPE_ARRAY:
4857 if (mspec) {
4858 switch (mspec->native) {
4859 case MONO_NATIVE_BYVALARRAY:
4860 if ((type->data.klass->element_class == mono_defaults.char_class) && !unicode)
4861 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALCHARARRAY;
4862 else
4863 *conv = MONO_MARSHAL_CONV_ARRAY_BYVALARRAY;
4864 return MONO_NATIVE_BYVALARRAY;
4865 case MONO_NATIVE_SAFEARRAY:
4866 *conv = MONO_MARSHAL_CONV_ARRAY_SAVEARRAY;
4867 return MONO_NATIVE_SAFEARRAY;
4868 case MONO_NATIVE_LPARRAY:
4869 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4870 return MONO_NATIVE_LPARRAY;
4871 default:
4872 g_error ("cant marshal array as native type %02x", mspec->native);
4873 }
4874 }
4875
4876 *conv = MONO_MARSHAL_CONV_ARRAY_LPARRAY;
4877 return MONO_NATIVE_LPARRAY;
4878 case MONO_TYPE_I: return MONO_NATIVE_INT;
4879 case MONO_TYPE_U: return MONO_NATIVE_UINT;
4880 case MONO_TYPE_CLASS:
4881 case MONO_TYPE_OBJECT: {
4882 /* FIXME : we need to handle ArrayList and StringBuilder here, probably */
4883 if (mspec) {
4884 switch (mspec->native) {
4885 case MONO_NATIVE_STRUCT:
4886 return MONO_NATIVE_STRUCT;
4887 case MONO_NATIVE_CUSTOM:
4888 return MONO_NATIVE_CUSTOM;
4889 case MONO_NATIVE_INTERFACE:
4890 *conv = MONO_MARSHAL_CONV_OBJECT_INTERFACE;
4891 return MONO_NATIVE_INTERFACE;
4892 case MONO_NATIVE_IDISPATCH:
4893 *conv = MONO_MARSHAL_CONV_OBJECT_IDISPATCH;
4894 return MONO_NATIVE_IDISPATCH;
4895 case MONO_NATIVE_IUNKNOWN:
4896 *conv = MONO_MARSHAL_CONV_OBJECT_IUNKNOWN;
4897 return MONO_NATIVE_IUNKNOWN;
4898 case MONO_NATIVE_FUNC:
4899 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4900 type->data.klass == mono_defaults.delegate_class ||
4901 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4902 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4903 return MONO_NATIVE_FUNC;
4904 }
4905 /* Fall through */
4906 default:
4907 g_error ("cant marshal object as native type %02x", mspec->native);
4908 }
4909 }
4910 if (t == MONO_TYPE_CLASS && (type->data.klass == mono_defaults.multicastdelegate_class ||
4911 type->data.klass == mono_defaults.delegate_class ||
4912 type->data.klass->parent == mono_defaults.multicastdelegate_class)) {
4913 *conv = MONO_MARSHAL_CONV_DEL_FTN;
4914 return MONO_NATIVE_FUNC;
4915 }
4916 if (mono_defaults.safehandle_class && type->data.klass == mono_defaults.safehandle_class){
4917 *conv = MONO_MARSHAL_CONV_SAFEHANDLE;
4918 return MONO_NATIVE_INT;
4919 }
4920 *conv = MONO_MARSHAL_CONV_OBJECT_STRUCT;
4921 return MONO_NATIVE_STRUCT;
4922 }
4923 case MONO_TYPE_FNPTR: return MONO_NATIVE_FUNC;
4924 case MONO_TYPE_GENERICINST:
4925 type = &type->data.generic_class->container_class->byval_arg;
4926 t = type->type;
4927 goto handle_enum;
4928 case MONO_TYPE_TYPEDBYREF:
4929 default:
4930 g_error ("type 0x%02x not handled in marshal", t);
4931 }
4932 return MONO_NATIVE_MAX;
4933 }
4934
4935 const char*
4936 mono_metadata_get_marshal_info (MonoImage *meta, guint32 idx, gboolean is_field)
4937 {
4938 locator_t loc;
4939 MonoTableInfo *tdef = &meta->tables [MONO_TABLE_FIELDMARSHAL];
4940
4941 if (!tdef->base)
4942 return NULL;
4943
4944 loc.t = tdef;
4945 loc.col_idx = MONO_FIELD_MARSHAL_PARENT;
4946 loc.idx = ((idx + 1) << MONO_HAS_FIELD_MARSHAL_BITS) | (is_field? MONO_HAS_FIELD_MARSHAL_FIELDSREF: MONO_HAS_FIELD_MARSHAL_PARAMDEF);
4947
4948 /* FIXME: Index translation */
4949
4950 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
4951 return NULL;
4952
4953 return mono_metadata_blob_heap (meta, mono_metadata_decode_row_col (tdef, loc.result, MONO_FIELD_MARSHAL_NATIVE_TYPE));
4954 }
4955
4956 static MonoMethod*
4957 method_from_method_def_or_ref (MonoImage *m, guint32 tok, MonoGenericContext *context)
4958 {
4959 guint32 idx = tok >> MONO_METHODDEFORREF_BITS;
4960
4961 switch (tok & MONO_METHODDEFORREF_MASK) {
4962 case MONO_METHODDEFORREF_METHODDEF:
4963 return mono_get_method_full (m, MONO_TOKEN_METHOD_DEF | idx, NULL, context);
4964 case MONO_METHODDEFORREF_METHODREF:
4965 return mono_get_method_full (m, MONO_TOKEN_MEMBER_REF | idx, NULL, context);
4966 }
4967 g_assert_not_reached ();
4968 return NULL;
4969 }
4970
4971 /*
4972 * mono_class_get_overrides_full:
4973 *
4974 * Return the method overrides belonging to class @type_token in @overrides, and
4975 * the number of overrides in @num_overrides.
4976 *
4977 * Returns: TRUE on success, FALSE on failure.
4978 */
4979 gboolean
4980 mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod ***overrides, gint32 *num_overrides,
4981 MonoGenericContext *generic_context)
4982 {
4983 locator_t loc;
4984 MonoTableInfo *tdef = &image->tables [MONO_TABLE_METHODIMPL];
4985 guint32 start, end;
4986 gint32 i, num;
4987 guint32 cols [MONO_METHODIMPL_SIZE];
4988 MonoMethod **result;
4989 gint32 ok = TRUE;
4990
4991 *overrides = NULL;
4992 if (num_overrides)
4993 *num_overrides = 0;
4994
4995 if (!tdef->base)
4996 return TRUE;
4997
4998 loc.t = tdef;
4999 loc.col_idx = MONO_METHODIMPL_CLASS;
5000 loc.idx = mono_metadata_token_index (type_token);
5001
5002 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5003 return TRUE;
5004
5005 start = loc.result;
5006 end = start + 1;
5007 /*
5008 * We may end up in the middle of the rows...
5009 */
5010 while (start > 0) {
5011 if (loc.idx == mono_metadata_decode_row_col (tdef, start - 1, MONO_METHODIMPL_CLASS))
5012 start--;
5013 else
5014 break;
5015 }
5016 while (end < tdef->rows) {
5017 if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
5018 end++;
5019 else
5020 break;
5021 }
5022 num = end - start;
5023 result = g_new (MonoMethod*, num * 2);
5024 for (i = 0; i < num; ++i) {
5025 MonoMethod *method;
5026
5027 mono_metadata_decode_row (tdef, start + i, cols, MONO_METHODIMPL_SIZE);
5028 method = method_from_method_def_or_ref (
5029 image, cols [MONO_METHODIMPL_DECLARATION], generic_context);
5030 if (method == NULL)
5031 ok = FALSE;
5032 result [i * 2] = method;
5033 method = method_from_method_def_or_ref (
5034 image, cols [MONO_METHODIMPL_BODY], generic_context);
5035 if (method == NULL)
5036 ok = FALSE;
5037 result [i * 2 + 1] = method;
5038 }
5039
5040 *overrides = result;
5041 if (num_overrides)
5042 *num_overrides = num;
5043 return ok;
5044 }
5045
5046 /**
5047 * mono_guid_to_string:
5048 *
5049 * Converts a 16 byte Microsoft GUID to the standard string representation.
5050 */
5051 char *
5052 mono_guid_to_string (const guint8 *guid)
5053 {
5054 return g_strdup_printf ("%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
5055 guid[3], guid[2], guid[1], guid[0],
5056 guid[5], guid[4],
5057 guid[7], guid[6],
5058 guid[8], guid[9],
5059 guid[10], guid[11], guid[12], guid[13], guid[14], guid[15]);
5060 }
5061
5062 static gboolean
5063 get_constraints (MonoImage *image, int owner, MonoClass ***constraints, MonoGenericContainer *container)
5064 {
5065 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAMCONSTRAINT];
5066 guint32 cols [MONO_GENPARCONSTRAINT_SIZE];
5067 guint32 i, token, found;
5068 MonoClass *klass, **res;
5069 GList *cons = NULL, *tmp;
5070 MonoGenericContext *context = &container->context;
5071
5072 *constraints = NULL;
5073 found = 0;
5074 for (i = 0; i < tdef->rows; ++i) {
5075 mono_metadata_decode_row (tdef, i, cols, MONO_GENPARCONSTRAINT_SIZE);
5076 if (cols [MONO_GENPARCONSTRAINT_GENERICPAR] == owner) {
5077 token = mono_metadata_token_from_dor (cols [MONO_GENPARCONSTRAINT_CONSTRAINT]);
5078 klass = mono_class_get_full (image, token, context);
5079 cons = g_list_append (cons, klass);
5080 ++found;
5081 } else {
5082 /* contiguous list finished */
5083 if (found)
5084 break;
5085 }
5086 }
5087 if (!found)
5088 return TRUE;
5089 res = g_new0 (MonoClass*, found + 1);
5090 for (i = 0, tmp = cons; i < found; ++i, tmp = tmp->next) {
5091 res [i] = tmp->data;
5092 }
5093 g_list_free (cons);
5094 *constraints = res;
5095 return TRUE;
5096 }
5097
5098 /*
5099 * mono_metadata_get_generic_param_row:
5100 *
5101 * @image:
5102 * @token: TypeOrMethodDef token, owner for GenericParam
5103 * @owner: coded token, set on return
5104 *
5105 * Returns: 1-based row-id in the GenericParam table whose
5106 * owner is @token. 0 if not found.
5107 */
5108 guint32
5109 mono_metadata_get_generic_param_row (MonoImage *image, guint32 token, guint32 *owner)
5110 {
5111 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
5112 locator_t loc;
5113
5114 g_assert (owner);
5115 if (!tdef->base)
5116 return 0;
5117
5118 if (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
5119 *owner = MONO_TYPEORMETHOD_TYPE;
5120 else if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
5121 *owner = MONO_TYPEORMETHOD_METHOD;
5122 else {
5123 g_error ("wrong token %x to get_generic_param_row", token);
5124 return 0;
5125 }
5126 *owner |= mono_metadata_token_index (token) << MONO_TYPEORMETHOD_BITS;
5127
5128 loc.idx = *owner;
5129 loc.col_idx = MONO_GENERICPARAM_OWNER;
5130 loc.t = tdef;
5131
5132 if (!bsearch (&loc, tdef->base, tdef->rows, tdef->row_size, table_locator))
5133 return 0;
5134
5135 /* Find the first entry by searching backwards */
5136 while ((loc.result > 0) && (mono_metadata_decode_row_col (tdef, loc.result - 1, MONO_GENERICPARAM_OWNER) == loc.idx))
5137 loc.result --;
5138
5139 return loc.result + 1;
5140 }
5141
5142 gboolean
5143 mono_metadata_has_generic_params (MonoImage *image, guint32 token)
5144 {
5145 guint32 owner;
5146 return mono_metadata_get_generic_param_row (image, token, &owner);
5147 }
5148
5149 /*
5150 * mono_metadata_load_generic_param_constraints:
5151 *
5152 * Load the generic parameter constraints for the newly created generic type or method
5153 * represented by @token and @container. The @container is the new container which has
5154 * been returned by a call to mono_metadata_load_generic_params() with this @token.
5155 */
5156 void
5157 mono_metadata_load_generic_param_constraints (MonoImage *image, guint32 token,
5158 MonoGenericContainer *container)
5159 {
5160 guint32 start_row, i, owner;
5161 if (! (start_row = mono_metadata_get_generic_param_row (image, token, &owner)))
5162 return;
5163 for (i = 0; i < container->type_argc; i++)
5164 get_constraints (image, start_row + i, &container->type_params [i].constraints, container);
5165 }
5166
5167 /*
5168 * mono_metadata_load_generic_params:
5169 *
5170 * Load the type parameters from the type or method definition @token.
5171 *
5172 * Use this method after parsing a type or method definition to figure out whether it's a generic
5173 * type / method. When parsing a method definition, @parent_container points to the generic container
5174 * of the current class, if any.
5175 *
5176 * Note: This method does not load the constraints: for typedefs, this has to be done after fully
5177 * creating the type.
5178 *
5179 * Returns: NULL if @token is not a generic type or method definition or the new generic container.
5180 *
5181 * LOCKING: Acquires the loader lock
5182 *
5183 */
5184 MonoGenericContainer *
5185 mono_metadata_load_generic_params (MonoImage *image, guint32 token, MonoGenericContainer *parent_container)
5186 {
5187 MonoTableInfo *tdef = &image->tables [MONO_TABLE_GENERICPARAM];
5188 guint32 cols [MONO_GENERICPARAM_SIZE];
5189 guint32 i, owner = 0, n;
5190 MonoGenericContainer *container;
5191 MonoGenericParam *params;
5192 MonoGenericContext *context;
5193
5194 if (!(i = mono_metadata_get_generic_param_row (image, token, &owner)))
5195 return NULL;
5196 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
5197 params = NULL;
5198 n = 0;
5199 container = mono_image_alloc0_lock (image, sizeof (MonoGenericContainer));
5200 do {
5201 n++;
5202 params = g_realloc (params, sizeof (MonoGenericParam) * n);
5203 params [n - 1].owner = container;
5204 params [n - 1].pklass = NULL;
5205 params [n - 1].flags = cols [MONO_GENERICPARAM_FLAGS];
5206 params [n - 1].num = cols [MONO_GENERICPARAM_NUMBER];
5207 params [n - 1].name = mono_metadata_string_heap (image, cols [MONO_GENERICPARAM_NAME]);
5208 params [n - 1].constraints = NULL;
5209 if (++i > tdef->rows)
5210 break;
5211 mono_metadata_decode_row (tdef, i - 1, cols, MONO_GENERICPARAM_SIZE);
5212 } while (cols [MONO_GENERICPARAM_OWNER] == owner);
5213
5214 container->type_argc = n;
5215 container->type_params = mono_image_alloc0_lock (image, sizeof (MonoGenericParam) * n);
5216 memcpy (container->type_params, params, sizeof (MonoGenericParam) * n);
5217 g_free (params);
5218 container->parent = parent_container;
5219
5220 if (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
5221 container->is_method = 1;
5222
5223 g_assert (container->parent == NULL || container->is_method);
5224
5225 context = &container->context;
5226 if (container->is_method) {
5227 context->class_inst = container->parent ? container->parent->context.class_inst : NULL;
5228 context->method_inst = mono_get_shared_generic_inst (container);
5229 } else {
5230 context->class_inst = mono_get_shared_generic_inst (container);
5231 }
5232
5233 return container;
5234 }
5235
5236 MonoGenericInst *
5237 mono_get_shared_generic_inst (MonoGenericContainer *container)
5238 {
5239 MonoType **type_argv;
5240 MonoType *helper;
5241 MonoGenericInst *nginst;
5242 int i;
5243
5244 type_argv = g_new0 (MonoType *, container->type_argc);
5245 helper = g_new0 (MonoType, container->type_argc);
5246
5247 for (i = 0; i < container->type_argc; i++) {
5248 MonoType *t = &helper [i];
5249
5250 t->type = container->is_method ? MONO_TYPE_MVAR : MONO_TYPE_VAR;
5251 t->data.generic_param = &container->type_params [i];
5252
5253 type_argv [i] = t;
5254 }
5255
5256 nginst = mono_metadata_get_generic_inst (container->type_argc, type_argv);
5257
5258 g_free (type_argv);
5259 g_free (helper);
5260
5261 return nginst;
5262 }
5263
5264 gboolean
5265 mono_type_is_byref (MonoType *type)
5266 {
5267 return type->byref;
5268 }
5269
5270 int
5271 mono_type_get_type (MonoType *type)
5272 {
5273 return type->type;
5274 }
5275
5276 /* For MONO_TYPE_FNPTR */
5277 MonoMethodSignature*
5278 mono_type_get_signature (MonoType *type)
5279 {
5280 return type->data.method;
5281 }
5282
5283 /* For MONO_TYPE_CLASS, VALUETYPE */
5284 MonoClass*
5285 mono_type_get_class (MonoType *type)
5286 {
5287 return type->data.klass;
5288 }
5289
5290 /* For MONO_TYPE_ARRAY */
5291 MonoArrayType*
5292 mono_type_get_array_type (MonoType *type)
5293 {
5294 return type->data.array;
5295 }
5296
5297 /* For MONO_TYPE_PTR */
5298 MonoType*
5299 mono_type_get_ptr_type (MonoType *type)
5300 {
5301 return type->data.type;
5302 }
5303
5304 MonoClass*
5305 mono_type_get_modifiers (MonoType *type, gboolean *is_required, gpointer *iter)
5306 {
5307 /* FIXME: implement */
5308 return NULL;
5309 }
5310
5311 MonoType*
5312 mono_signature_get_return_type (MonoMethodSignature *sig)
5313 {
5314 return sig->ret;
5315 }
5316
5317 MonoType*
5318 mono_signature_get_params (MonoMethodSignature *sig, gpointer *iter)
5319 {
5320 MonoType** type;
5321 if (!iter)
5322 return NULL;
5323 if (!*iter) {
5324 /* start from the first */
5325 if (sig->param_count) {
5326 *iter = &sig->params [0];
5327 return sig->params [0];
5328 } else {
5329 /* no method */
5330 return NULL;
5331 }
5332 }
5333 type = *iter;
5334 type++;
5335 if (type < &sig->params [sig->param_count]) {
5336 *iter = type;
5337 return *type;
5338 }
5339 return NULL;
5340 }
5341
5342 guint32
5343 mono_signature_get_param_count (MonoMethodSignature *sig)
5344 {
5345 return sig->param_count;
5346 }
5347
5348 guint32
5349 mono_signature_get_call_conv (MonoMethodSignature *sig)
5350 {
5351 return sig->call_convention;
5352 }
5353
5354 int
5355 mono_signature_vararg_start (MonoMethodSignature *sig)
5356 {
5357 return sig->sentinelpos;
5358 }
5359
5360 gboolean
5361 mono_signature_is_instance (MonoMethodSignature *sig)
5362 {
5363 return sig->hasthis;
5364 }
5365
5366 gboolean
5367 mono_signature_explicit_this (MonoMethodSignature *sig)
5368 {
5369 return sig->explicit_this;
5370 }
5371
5372 /* for use with allocated memory blocks (assumes alignment is to 8 bytes) */
5373 guint
5374 mono_aligned_addr_hash (gconstpointer ptr)
5375 {
5376 return GPOINTER_TO_UINT (ptr) >> 3;
5377 }
5378
5379 /*
5380 * If @field belongs to an inflated generic class, return the corresponding field of the
5381 * generic type definition class.
5382 */
5383 MonoClassField*
5384 mono_metadata_get_corresponding_field_from_generic_type_definition (MonoClassField *field)
5385 {
5386 MonoClass *gtd;
5387 int offset;
5388
5389 if (!field->parent->generic_class)
5390 return field;
5391
5392 gtd = field->parent->generic_class->container_class;
5393 offset = field - field->parent->fields;
5394 return gtd->fields + offset;
5395 }
5396
5397 /*
5398 * If @event belongs to an inflated generic class, return the corresponding event of the
5399 * generic type definition class.
5400 */
5401 MonoEvent*
5402 mono_metadata_get_corresponding_event_from_generic_type_definition (MonoEvent *event)
5403 {
5404 MonoClass *gtd;
5405 int offset;
5406
5407 if (!event->parent->generic_class)
5408 return event;
5409
5410 gtd = event->parent->generic_class->container_class;
5411 offset = event - event->parent->events;
5412 return gtd->events + offset;
5413 }
5414
5415 /*
5416 * If @property belongs to an inflated generic class, return the corresponding property of the
5417 * generic type definition class.
5418 */
5419 MonoProperty*
5420 mono_metadata_get_corresponding_property_from_generic_type_definition (MonoProperty *property)
5421 {
5422 MonoClass *gtd;
5423 int offset;
5424
5425 if (!property->parent->generic_class)
5426 return property;
5427
5428 gtd = property->parent->generic_class->container_class;
5429 offset = property - property->parent->properties;
5430 return gtd->properties + offset;
5431 }
5432
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