-
Notifications
You must be signed in to change notification settings - Fork 3.8k
/
class.c
10607 lines (9224 loc) · 314 KB
/
class.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* class.c: Class management for the Mono runtime
*
* Author:
* Miguel de Icaza (miguel@ximian.com)
*
* Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
* Copyright 2004-2009 Novell, Inc (http://www.novell.com)
* Copyright 2012 Xamarin Inc (http://www.xamarin.com)
*/
#include <config.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include <glib.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <mono/metadata/image.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/metadata.h>
#include <mono/metadata/metadata-internals.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/class-internals.h>
#include <mono/metadata/object.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/reflection.h>
#include <mono/metadata/exception.h>
#include <mono/metadata/security-manager.h>
#include <mono/metadata/security-core-clr.h>
#include <mono/metadata/attrdefs.h>
#include <mono/metadata/gc-internal.h>
#include <mono/metadata/verify-internals.h>
#include <mono/metadata/mono-debug.h>
#include <mono/utils/mono-counters.h>
#include <mono/utils/mono-string.h>
#include <mono/utils/mono-error-internals.h>
#include <mono/utils/mono-logger-internal.h>
#include <mono/utils/mono-memory-model.h>
#include <mono/utils/atomic.h>
#include <mono/utils/bsearch.h>
MonoStats mono_stats;
gboolean mono_print_vtable = FALSE;
gboolean mono_align_small_structs = FALSE;
/* Statistics */
guint32 inflated_classes, inflated_classes_size, inflated_methods_size;
guint32 classes_size, class_ext_size;
/* Low level lock which protects data structures in this module */
static mono_mutex_t classes_mutex;
/* Function supplied by the runtime to find classes by name using information from the AOT file */
static MonoGetClassFromName get_class_from_name = NULL;
static MonoClass * mono_class_create_from_typedef (MonoImage *image, guint32 type_token, MonoError *error);
static gboolean mono_class_get_cached_class_info (MonoClass *klass, MonoCachedClassInfo *res);
static gboolean can_access_type (MonoClass *access_klass, MonoClass *member_klass);
static MonoMethod* find_method_in_metadata (MonoClass *klass, const char *name, int param_count, int flags);
static int generic_array_methods (MonoClass *class);
static void setup_generic_array_ifaces (MonoClass *class, MonoClass *iface, MonoMethod **methods, int pos);
static MonoMethod* mono_class_get_virtual_methods (MonoClass* klass, gpointer *iter);
static char* mono_assembly_name_from_token (MonoImage *image, guint32 type_token);
static void mono_field_resolve_type (MonoClassField *field, MonoError *error);
static guint32 mono_field_resolve_flags (MonoClassField *field);
static void mono_class_setup_vtable_full (MonoClass *class, GList *in_setup);
static void mono_generic_class_setup_parent (MonoClass *klass, MonoClass *gklass);
/*
We use gclass recording to allow recursive system f types to be referenced by a parent.
Given the following type hierarchy:
class TextBox : TextBoxBase<TextBox> {}
class TextBoxBase<T> : TextInput<TextBox> where T : TextBoxBase<T> {}
class TextInput<T> : Input<T> where T: TextInput<T> {}
class Input<T> {}
The runtime tries to load TextBoxBase<>.
To load TextBoxBase<> to do so it must resolve the parent which is TextInput<TextBox>.
To instantiate TextInput<TextBox> it must resolve TextInput<> and TextBox.
To load TextBox it must resolve the parent which is TextBoxBase<TextBox>.
At this point the runtime must instantiate TextBoxBase<TextBox>. Both types are partially loaded
at this point, iow, both are registered in the type map and both and a NULL parent. This means
that the resulting generic instance will have a NULL parent, which is wrong and will cause breakage.
To fix that what we do is to record all generic instantes created while resolving the parent of
any generic type definition and, after resolved, correct the parent field if needed.
*/
static int record_gclass_instantiation;
static GSList *gclass_recorded_list;
typedef gboolean (*gclass_record_func) (MonoClass*, void*);
static inline void
classes_lock (void)
{
mono_locks_acquire (&classes_mutex, ClassesLock);
}
static inline void
classes_unlock (void)
{
mono_locks_release (&classes_mutex, ClassesLock);
}
/*
* LOCKING: loader lock must be held until pairing disable_gclass_recording is called.
*/
static void
enable_gclass_recording (void)
{
++record_gclass_instantiation;
}
/*
* LOCKING: loader lock must be held since pairing enable_gclass_recording was called.
*/
static void
disable_gclass_recording (gclass_record_func func, void *user_data)
{
GSList **head = &gclass_recorded_list;
g_assert (record_gclass_instantiation > 0);
--record_gclass_instantiation;
while (*head) {
GSList *node = *head;
if (func ((MonoClass*)node->data, user_data)) {
*head = node->next;
g_slist_free_1 (node);
} else {
head = &node->next;
}
}
/* We automatically discard all recorded gclasses when disabled. */
if (!record_gclass_instantiation && gclass_recorded_list) {
g_slist_free (gclass_recorded_list);
gclass_recorded_list = NULL;
}
}
/*
* mono_class_from_typeref:
* @image: a MonoImage
* @type_token: a TypeRef token
*
* Creates the MonoClass* structure representing the type defined by
* the typeref token valid inside @image.
* Returns: the MonoClass* representing the typeref token, NULL ifcould
* not be loaded.
*/
MonoClass *
mono_class_from_typeref (MonoImage *image, guint32 type_token)
{
MonoError error;
MonoClass *class = mono_class_from_typeref_checked (image, type_token, &error);
g_assert (mono_error_ok (&error)); /*FIXME proper error handling*/
return class;
}
MonoClass *
mono_class_from_typeref_checked (MonoImage *image, guint32 type_token, MonoError *error)
{
guint32 cols [MONO_TYPEREF_SIZE];
MonoTableInfo *t = &image->tables [MONO_TABLE_TYPEREF];
guint32 idx;
const char *name, *nspace;
MonoClass *res = NULL;
MonoImage *module;
mono_error_init (error);
if (!mono_verifier_verify_typeref_row (image, (type_token & 0xffffff) - 1, error))
return NULL;
mono_metadata_decode_row (t, (type_token&0xffffff)-1, cols, MONO_TYPEREF_SIZE);
name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
idx = cols [MONO_TYPEREF_SCOPE] >> MONO_RESOLUTION_SCOPE_BITS;
switch (cols [MONO_TYPEREF_SCOPE] & MONO_RESOLUTION_SCOPE_MASK) {
case MONO_RESOLUTION_SCOPE_MODULE:
/*
LAMESPEC The spec says that a null module resolution scope should go through the exported type table.
This is not the observed behavior of existing implementations.
The defacto behavior is that it's just a typedef in disguise.
*/
/* a typedef in disguise */
res = mono_class_from_name_checked (image, nspace, name, error);
goto done;
case MONO_RESOLUTION_SCOPE_MODULEREF:
module = mono_image_load_module (image, idx);
if (module)
res = mono_class_from_name_checked (module, nspace, name, error);
goto done;
case MONO_RESOLUTION_SCOPE_TYPEREF: {
MonoClass *enclosing;
GList *tmp;
if (idx == mono_metadata_token_index (type_token)) {
mono_error_set_bad_image (error, image, "Image with self-referencing typeref token %08x.", type_token);
return NULL;
}
enclosing = mono_class_from_typeref_checked (image, MONO_TOKEN_TYPE_REF | idx, error);
if (!mono_error_ok (error))
return NULL;
if (enclosing->nested_classes_inited && enclosing->ext) {
/* Micro-optimization: don't scan the metadata tables if enclosing is already inited */
for (tmp = enclosing->ext->nested_classes; tmp; tmp = tmp->next) {
res = tmp->data;
if (strcmp (res->name, name) == 0)
return res;
}
} else {
/* Don't call mono_class_init as we might've been called by it recursively */
int i = mono_metadata_nesting_typedef (enclosing->image, enclosing->type_token, 1);
while (i) {
guint32 class_nested = mono_metadata_decode_row_col (&enclosing->image->tables [MONO_TABLE_NESTEDCLASS], i - 1, MONO_NESTED_CLASS_NESTED);
guint32 string_offset = mono_metadata_decode_row_col (&enclosing->image->tables [MONO_TABLE_TYPEDEF], class_nested - 1, MONO_TYPEDEF_NAME);
const char *nname = mono_metadata_string_heap (enclosing->image, string_offset);
if (strcmp (nname, name) == 0)
return mono_class_create_from_typedef (enclosing->image, MONO_TOKEN_TYPE_DEF | class_nested, error);
i = mono_metadata_nesting_typedef (enclosing->image, enclosing->type_token, i + 1);
}
}
g_warning ("TypeRef ResolutionScope not yet handled (%d) for %s.%s in image %s", idx, nspace, name, image->name);
goto done;
}
case MONO_RESOLUTION_SCOPE_ASSEMBLYREF:
break;
}
if (idx > image->tables [MONO_TABLE_ASSEMBLYREF].rows) {
mono_error_set_bad_image (error, image, "Image with invalid assemblyref token %08x.", idx);
return NULL;
}
if (!image->references || !image->references [idx - 1])
mono_assembly_load_reference (image, idx - 1);
g_assert (image->references [idx - 1]);
/* If the assembly did not load, register this as a type load exception */
if (image->references [idx - 1] == REFERENCE_MISSING){
MonoAssemblyName aname;
char *human_name;
mono_assembly_get_assemblyref (image, idx - 1, &aname);
human_name = mono_stringify_assembly_name (&aname);
mono_error_set_assembly_load_simple (error, human_name, image->assembly ? image->assembly->ref_only : FALSE);
return NULL;
}
res = mono_class_from_name_checked (image->references [idx - 1]->image, nspace, name, error);
done:
/* Generic case, should be avoided for when a better error is possible. */
if (!res && mono_error_ok (error)) {
if (mono_loader_get_last_error ()) { /*FIXME plug the above to not leak errors*/
mono_error_set_from_loader_error (error);
} else {
char *name = mono_class_name_from_token (image, type_token);
char *assembly = mono_assembly_name_from_token (image, type_token);
mono_error_set_type_load_name (error, name, assembly, "Could not resolve type with token %08x", type_token);
}
}
mono_loader_assert_no_error ();
return res;
}
static void *
mono_image_memdup (MonoImage *image, void *data, guint size)
{
void *res = mono_image_alloc (image, size);
memcpy (res, data, size);
return res;
}
/* Copy everything mono_metadata_free_array free. */
MonoArrayType *
mono_dup_array_type (MonoImage *image, MonoArrayType *a)
{
if (image) {
a = mono_image_memdup (image, a, sizeof (MonoArrayType));
if (a->sizes)
a->sizes = mono_image_memdup (image, a->sizes, a->numsizes * sizeof (int));
if (a->lobounds)
a->lobounds = mono_image_memdup (image, a->lobounds, a->numlobounds * sizeof (int));
} else {
a = g_memdup (a, sizeof (MonoArrayType));
if (a->sizes)
a->sizes = g_memdup (a->sizes, a->numsizes * sizeof (int));
if (a->lobounds)
a->lobounds = g_memdup (a->lobounds, a->numlobounds * sizeof (int));
}
return a;
}
/* Copy everything mono_metadata_free_method_signature free. */
MonoMethodSignature*
mono_metadata_signature_deep_dup (MonoImage *image, MonoMethodSignature *sig)
{
int i;
sig = mono_metadata_signature_dup_full (image, sig);
sig->ret = mono_metadata_type_dup (image, sig->ret);
for (i = 0; i < sig->param_count; ++i)
sig->params [i] = mono_metadata_type_dup (image, sig->params [i]);
return sig;
}
static void
_mono_type_get_assembly_name (MonoClass *klass, GString *str)
{
MonoAssembly *ta = klass->image->assembly;
char *name;
name = mono_stringify_assembly_name (&ta->aname);
g_string_append_printf (str, ", %s", name);
g_free (name);
}
static inline void
mono_type_name_check_byref (MonoType *type, GString *str)
{
if (type->byref)
g_string_append_c (str, '&');
}
static void
mono_type_get_name_recurse (MonoType *type, GString *str, gboolean is_recursed,
MonoTypeNameFormat format)
{
MonoClass *klass;
switch (type->type) {
case MONO_TYPE_ARRAY: {
int i, rank = type->data.array->rank;
MonoTypeNameFormat nested_format;
nested_format = format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED ?
MONO_TYPE_NAME_FORMAT_FULL_NAME : format;
mono_type_get_name_recurse (
&type->data.array->eklass->byval_arg, str, FALSE, nested_format);
g_string_append_c (str, '[');
if (rank == 1)
g_string_append_c (str, '*');
for (i = 1; i < rank; i++)
g_string_append_c (str, ',');
g_string_append_c (str, ']');
mono_type_name_check_byref (type, str);
if (format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)
_mono_type_get_assembly_name (type->data.array->eklass, str);
break;
}
case MONO_TYPE_SZARRAY: {
MonoTypeNameFormat nested_format;
nested_format = format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED ?
MONO_TYPE_NAME_FORMAT_FULL_NAME : format;
mono_type_get_name_recurse (
&type->data.klass->byval_arg, str, FALSE, nested_format);
g_string_append (str, "[]");
mono_type_name_check_byref (type, str);
if (format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)
_mono_type_get_assembly_name (type->data.klass, str);
break;
}
case MONO_TYPE_PTR: {
MonoTypeNameFormat nested_format;
nested_format = format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED ?
MONO_TYPE_NAME_FORMAT_FULL_NAME : format;
mono_type_get_name_recurse (
type->data.type, str, FALSE, nested_format);
g_string_append_c (str, '*');
mono_type_name_check_byref (type, str);
if (format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)
_mono_type_get_assembly_name (mono_class_from_mono_type (type->data.type), str);
break;
}
case MONO_TYPE_VAR:
case MONO_TYPE_MVAR:
if (!mono_generic_param_info (type->data.generic_param))
g_string_append_printf (str, "%s%d", type->type == MONO_TYPE_VAR ? "!" : "!!", type->data.generic_param->num);
else
g_string_append (str, mono_generic_param_info (type->data.generic_param)->name);
mono_type_name_check_byref (type, str);
break;
default:
klass = mono_class_from_mono_type (type);
if (klass->nested_in) {
mono_type_get_name_recurse (
&klass->nested_in->byval_arg, str, TRUE, format);
if (format == MONO_TYPE_NAME_FORMAT_IL)
g_string_append_c (str, '.');
else
g_string_append_c (str, '+');
} else if (*klass->name_space) {
g_string_append (str, klass->name_space);
g_string_append_c (str, '.');
}
if (format == MONO_TYPE_NAME_FORMAT_IL) {
char *s = strchr (klass->name, '`');
int len = s ? s - klass->name : strlen (klass->name);
g_string_append_len (str, klass->name, len);
} else
g_string_append (str, klass->name);
if (is_recursed)
break;
if (klass->generic_class) {
MonoGenericClass *gclass = klass->generic_class;
MonoGenericInst *inst = gclass->context.class_inst;
MonoTypeNameFormat nested_format;
int i;
nested_format = format == MONO_TYPE_NAME_FORMAT_FULL_NAME ?
MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED : format;
if (format == MONO_TYPE_NAME_FORMAT_IL)
g_string_append_c (str, '<');
else
g_string_append_c (str, '[');
for (i = 0; i < inst->type_argc; i++) {
MonoType *t = inst->type_argv [i];
if (i)
g_string_append_c (str, ',');
if ((nested_format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED) &&
(t->type != MONO_TYPE_VAR) && (type->type != MONO_TYPE_MVAR))
g_string_append_c (str, '[');
mono_type_get_name_recurse (inst->type_argv [i], str, FALSE, nested_format);
if ((nested_format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED) &&
(t->type != MONO_TYPE_VAR) && (type->type != MONO_TYPE_MVAR))
g_string_append_c (str, ']');
}
if (format == MONO_TYPE_NAME_FORMAT_IL)
g_string_append_c (str, '>');
else
g_string_append_c (str, ']');
} else if (klass->generic_container &&
(format != MONO_TYPE_NAME_FORMAT_FULL_NAME) &&
(format != MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED)) {
int i;
if (format == MONO_TYPE_NAME_FORMAT_IL)
g_string_append_c (str, '<');
else
g_string_append_c (str, '[');
for (i = 0; i < klass->generic_container->type_argc; i++) {
if (i)
g_string_append_c (str, ',');
g_string_append (str, mono_generic_container_get_param_info (klass->generic_container, i)->name);
}
if (format == MONO_TYPE_NAME_FORMAT_IL)
g_string_append_c (str, '>');
else
g_string_append_c (str, ']');
}
mono_type_name_check_byref (type, str);
if ((format == MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED) &&
(type->type != MONO_TYPE_VAR) && (type->type != MONO_TYPE_MVAR))
_mono_type_get_assembly_name (klass, str);
break;
}
}
/**
* mono_type_get_name_full:
* @type: a type
* @format: the format for the return string.
*
*
* Returns: the string representation in a number of formats:
*
* if format is MONO_TYPE_NAME_FORMAT_REFLECTION, the return string is
* returned in the formatrequired by System.Reflection, this is the
* inverse of mono_reflection_parse_type ().
*
* if format is MONO_TYPE_NAME_FORMAT_IL, it returns a syntax that can
* be used by the IL assembler.
*
* if format is MONO_TYPE_NAME_FORMAT_FULL_NAME
*
* if format is MONO_TYPE_NAME_FORMAT_ASSEMBLY_QUALIFIED
*/
char*
mono_type_get_name_full (MonoType *type, MonoTypeNameFormat format)
{
GString* result;
result = g_string_new ("");
mono_type_get_name_recurse (type, result, FALSE, format);
return g_string_free (result, FALSE);
}
/**
* mono_type_get_full_name:
* @class: a class
*
* Returns: the string representation for type as required by System.Reflection.
* The inverse of mono_reflection_parse_type ().
*/
char *
mono_type_get_full_name (MonoClass *class)
{
return mono_type_get_name_full (mono_class_get_type (class), MONO_TYPE_NAME_FORMAT_REFLECTION);
}
/**
* mono_type_get_name:
* @type: a type
*
* Returns: the string representation for type as it would be represented in IL code.
*/
char*
mono_type_get_name (MonoType *type)
{
return mono_type_get_name_full (type, MONO_TYPE_NAME_FORMAT_IL);
}
/*
* mono_type_get_underlying_type:
* @type: a type
*
* Returns: the MonoType for the underlying integer type if @type
* is an enum and byref is false, otherwise the type itself.
*/
MonoType*
mono_type_get_underlying_type (MonoType *type)
{
if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype && !type->byref)
return mono_class_enum_basetype (type->data.klass);
if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype && !type->byref)
return mono_class_enum_basetype (type->data.generic_class->container_class);
return type;
}
/*
* mono_class_is_open_constructed_type:
* @type: a type
*
* Returns TRUE if type represents a generics open constructed type.
* IOW, not all type parameters required for the instantiation have
* been provided or it's a generic type definition.
*
* An open constructed type means it's a non realizable type. Not to
* be mixed up with an abstract type - we can't cast or dispatch to
* an open type, for example.
*/
gboolean
mono_class_is_open_constructed_type (MonoType *t)
{
switch (t->type) {
case MONO_TYPE_VAR:
case MONO_TYPE_MVAR:
return TRUE;
case MONO_TYPE_SZARRAY:
return mono_class_is_open_constructed_type (&t->data.klass->byval_arg);
case MONO_TYPE_ARRAY:
return mono_class_is_open_constructed_type (&t->data.array->eklass->byval_arg);
case MONO_TYPE_PTR:
return mono_class_is_open_constructed_type (t->data.type);
case MONO_TYPE_GENERICINST:
return t->data.generic_class->context.class_inst->is_open;
case MONO_TYPE_CLASS:
case MONO_TYPE_VALUETYPE:
return t->data.klass->generic_container != NULL;
default:
return FALSE;
}
}
/*
This is a simple function to catch the most common bad instances of generic types.
Specially those that might lead to further failures in the runtime.
*/
static gboolean
is_valid_generic_argument (MonoType *type)
{
switch (type->type) {
case MONO_TYPE_VOID:
//case MONO_TYPE_TYPEDBYREF:
return FALSE;
default:
return TRUE;
}
}
static MonoType*
inflate_generic_type (MonoImage *image, MonoType *type, MonoGenericContext *context, MonoError *error)
{
mono_error_init (error);
switch (type->type) {
case MONO_TYPE_MVAR: {
MonoType *nt;
int num = mono_type_get_generic_param_num (type);
MonoGenericInst *inst = context->method_inst;
if (!inst)
return NULL;
if (num >= inst->type_argc) {
MonoGenericParamInfo *info = mono_generic_param_info (type->data.generic_param);
mono_error_set_bad_image (error, image, "MVAR %d (%s) cannot be expanded in this context with %d instantiations",
num, info ? info->name : "", inst->type_argc);
return NULL;
}
if (!is_valid_generic_argument (inst->type_argv [num])) {
MonoGenericParamInfo *info = mono_generic_param_info (type->data.generic_param);
mono_error_set_bad_image (error, image, "MVAR %d (%s) cannot be expanded with type 0x%x",
num, info ? info->name : "", inst->type_argv [num]->type);
return NULL;
}
/*
* Note that the VAR/MVAR cases are different from the rest. The other cases duplicate @type,
* while the VAR/MVAR duplicates a type from the context. So, we need to ensure that the
* ->byref and ->attrs from @type are propagated to the returned type.
*/
nt = mono_metadata_type_dup (image, inst->type_argv [num]);
nt->byref = type->byref;
nt->attrs = type->attrs;
return nt;
}
case MONO_TYPE_VAR: {
MonoType *nt;
int num = mono_type_get_generic_param_num (type);
MonoGenericInst *inst = context->class_inst;
if (!inst)
return NULL;
if (num >= inst->type_argc) {
MonoGenericParamInfo *info = mono_generic_param_info (type->data.generic_param);
mono_error_set_bad_image (error, image, "VAR %d (%s) cannot be expanded in this context with %d instantiations",
num, info ? info->name : "", inst->type_argc);
return NULL;
}
if (!is_valid_generic_argument (inst->type_argv [num])) {
MonoGenericParamInfo *info = mono_generic_param_info (type->data.generic_param);
mono_error_set_bad_image (error, image, "VAR %d (%s) cannot be expanded with type 0x%x",
num, info ? info->name : "", inst->type_argv [num]->type);
return NULL;
}
nt = mono_metadata_type_dup (image, inst->type_argv [num]);
nt->byref = type->byref;
nt->attrs = type->attrs;
return nt;
}
case MONO_TYPE_SZARRAY: {
MonoClass *eclass = type->data.klass;
MonoType *nt, *inflated = inflate_generic_type (NULL, &eclass->byval_arg, context, error);
if (!inflated || !mono_error_ok (error))
return NULL;
nt = mono_metadata_type_dup (image, type);
nt->data.klass = mono_class_from_mono_type (inflated);
mono_metadata_free_type (inflated);
return nt;
}
case MONO_TYPE_ARRAY: {
MonoClass *eclass = type->data.array->eklass;
MonoType *nt, *inflated = inflate_generic_type (NULL, &eclass->byval_arg, context, error);
if (!inflated || !mono_error_ok (error))
return NULL;
nt = mono_metadata_type_dup (image, type);
nt->data.array->eklass = mono_class_from_mono_type (inflated);
mono_metadata_free_type (inflated);
return nt;
}
case MONO_TYPE_GENERICINST: {
MonoGenericClass *gclass = type->data.generic_class;
MonoGenericInst *inst;
MonoType *nt;
if (!gclass->context.class_inst->is_open)
return NULL;
inst = mono_metadata_inflate_generic_inst (gclass->context.class_inst, context, error);
if (!mono_error_ok (error))
return NULL;
if (inst != gclass->context.class_inst)
gclass = mono_metadata_lookup_generic_class (gclass->container_class, inst, gclass->is_dynamic);
if (gclass == type->data.generic_class)
return NULL;
nt = mono_metadata_type_dup (image, type);
nt->data.generic_class = gclass;
return nt;
}
case MONO_TYPE_CLASS:
case MONO_TYPE_VALUETYPE: {
MonoClass *klass = type->data.klass;
MonoGenericContainer *container = klass->generic_container;
MonoGenericInst *inst;
MonoGenericClass *gclass = NULL;
MonoType *nt;
if (!container)
return NULL;
/* We can't use context->class_inst directly, since it can have more elements */
inst = mono_metadata_inflate_generic_inst (container->context.class_inst, context, error);
if (!mono_error_ok (error))
return NULL;
if (inst == container->context.class_inst)
return NULL;
gclass = mono_metadata_lookup_generic_class (klass, inst, image_is_dynamic (klass->image));
nt = mono_metadata_type_dup (image, type);
nt->type = MONO_TYPE_GENERICINST;
nt->data.generic_class = gclass;
return nt;
}
default:
return NULL;
}
return NULL;
}
MonoGenericContext *
mono_generic_class_get_context (MonoGenericClass *gclass)
{
return &gclass->context;
}
MonoGenericContext *
mono_class_get_context (MonoClass *class)
{
return class->generic_class ? mono_generic_class_get_context (class->generic_class) : NULL;
}
/*
* mono_class_get_generic_container:
*
* Return the generic container of KLASS which should be a generic type definition.
*/
MonoGenericContainer*
mono_class_get_generic_container (MonoClass *klass)
{
g_assert (klass->is_generic);
return klass->generic_container;
}
/*
* mono_class_get_generic_class:
*
* Return the MonoGenericClass of KLASS, which should be a generic instance.
*/
MonoGenericClass*
mono_class_get_generic_class (MonoClass *klass)
{
g_assert (klass->is_inflated);
return klass->generic_class;
}
/*
* mono_class_inflate_generic_type_with_mempool:
* @mempool: a mempool
* @type: a type
* @context: a generics context
* @error: error context
*
* The same as mono_class_inflate_generic_type, but allocates the MonoType
* from mempool if it is non-NULL. If it is NULL, the MonoType is
* allocated on the heap and is owned by the caller.
* The returned type can potentially be the same as TYPE, so it should not be
* modified by the caller, and it should be freed using mono_metadata_free_type ().
*/
MonoType*
mono_class_inflate_generic_type_with_mempool (MonoImage *image, MonoType *type, MonoGenericContext *context, MonoError *error)
{
MonoType *inflated = NULL;
mono_error_init (error);
if (context)
inflated = inflate_generic_type (image, type, context, error);
if (!mono_error_ok (error))
return NULL;
if (!inflated) {
MonoType *shared = mono_metadata_get_shared_type (type);
if (shared) {
return shared;
} else {
return mono_metadata_type_dup (image, type);
}
}
mono_stats.inflated_type_count++;
return inflated;
}
/*
* mono_class_inflate_generic_type:
* @type: a type
* @context: a generics context
*
* If @type is a generic type and @context is not NULL, instantiate it using the
* generics context @context.
*
* Returns: the instantiated type or a copy of @type. The returned MonoType is allocated
* on the heap and is owned by the caller. Returns NULL on error.
*
* @deprecated Please use mono_class_inflate_generic_type_checked instead
*/
MonoType*
mono_class_inflate_generic_type (MonoType *type, MonoGenericContext *context)
{
MonoError error;
MonoType *result;
result = mono_class_inflate_generic_type_checked (type, context, &error);
if (!mono_error_ok (&error)) {
mono_error_cleanup (&error);
return NULL;
}
return result;
}
/*
* mono_class_inflate_generic_type:
* @type: a type
* @context: a generics context
* @error: error context to use
*
* If @type is a generic type and @context is not NULL, instantiate it using the
* generics context @context.
*
* Returns: the instantiated type or a copy of @type. The returned MonoType is allocated
* on the heap and is owned by the caller.
*/
MonoType*
mono_class_inflate_generic_type_checked (MonoType *type, MonoGenericContext *context, MonoError *error)
{
return mono_class_inflate_generic_type_with_mempool (NULL, type, context, error);
}
/*
* mono_class_inflate_generic_type_no_copy:
*
* Same as inflate_generic_type_with_mempool, but return TYPE if no inflation
* was done.
*/
static MonoType*
mono_class_inflate_generic_type_no_copy (MonoImage *image, MonoType *type, MonoGenericContext *context, MonoError *error)
{
MonoType *inflated = NULL;
mono_error_init (error);
if (context) {
inflated = inflate_generic_type (image, type, context, error);
if (!mono_error_ok (error))
return NULL;
}
if (!inflated)
return type;
mono_stats.inflated_type_count++;
return inflated;
}
MonoClass*
mono_class_inflate_generic_class_checked (MonoClass *gklass, MonoGenericContext *context, MonoError *error)
{
MonoClass *res;
MonoType *inflated;
inflated = mono_class_inflate_generic_type_checked (&gklass->byval_arg, context, error);
if (!mono_error_ok (error))
return NULL;
res = mono_class_from_mono_type (inflated);
mono_metadata_free_type (inflated);
return res;
}
/*
* mono_class_inflate_generic_class:
*
* Inflate the class GKLASS with CONTEXT.
*/
MonoClass*
mono_class_inflate_generic_class (MonoClass *gklass, MonoGenericContext *context)
{
MonoError error;
MonoClass *res;
res = mono_class_inflate_generic_class_checked (gklass, context, &error);
g_assert (mono_error_ok (&error)); /*FIXME proper error handling*/
return res;
}
static MonoGenericContext
inflate_generic_context (MonoGenericContext *context, MonoGenericContext *inflate_with, MonoError *error)
{
MonoGenericInst *class_inst = NULL;
MonoGenericInst *method_inst = NULL;
MonoGenericContext res = { NULL, NULL };
mono_error_init (error);
if (context->class_inst) {
class_inst = mono_metadata_inflate_generic_inst (context->class_inst, inflate_with, error);
if (!mono_error_ok (error))
goto fail;
}
if (context->method_inst) {
method_inst = mono_metadata_inflate_generic_inst (context->method_inst, inflate_with, error);
if (!mono_error_ok (error))
goto fail;
}
res.class_inst = class_inst;
res.method_inst = method_inst;
fail:
return res;
}
/*
* mono_class_inflate_generic_method:
* @method: a generic method
* @context: a generics context
*
* Instantiate the generic method @method using the generics context @context.
*
* Returns: the new instantiated method
*/
MonoMethod *
mono_class_inflate_generic_method (MonoMethod *method, MonoGenericContext *context)
{
return mono_class_inflate_generic_method_full (method, NULL, context);
}
MonoMethod *
mono_class_inflate_generic_method_checked (MonoMethod *method, MonoGenericContext *context, MonoError *error)
{
return mono_class_inflate_generic_method_full_checked (method, NULL, context, error);
}
/**
* mono_class_inflate_generic_method_full:
*
* Instantiate method @method with the generic context @context.
* BEWARE: All non-trivial fields are invalid, including klass, signature, and header.
* Use mono_method_signature () and mono_method_get_header () to get the correct values.
*/
MonoMethod*
mono_class_inflate_generic_method_full (MonoMethod *method, MonoClass *klass_hint, MonoGenericContext *context)
{
MonoError error;
MonoMethod *res = mono_class_inflate_generic_method_full_checked (method, klass_hint, context, &error);
if (!mono_error_ok (&error))
/*FIXME do proper error handling - on this case, kill this function. */
g_error ("Could not inflate generic method due to %s", mono_error_get_message (&error));
return res;
}