/
DebugInfoMetadata.h
3256 lines (2769 loc) · 126 KB
/
DebugInfoMetadata.h
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
//===- llvm/IR/DebugInfoMetadata.h - Debug info metadata --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Declarations for metadata specific to debug info.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_DEBUGINFOMETADATA_H
#define LLVM_IR_DEBUGINFOMETADATA_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/BitmaskEnum.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Metadata.h"
#include "llvm/Support/Casting.h"
#include <cassert>
#include <climits>
#include <cstddef>
#include <cstdint>
#include <iterator>
#include <type_traits>
#include <vector>
// Helper macros for defining get() overrides.
#define DEFINE_MDNODE_GET_UNPACK_IMPL(...) __VA_ARGS__
#define DEFINE_MDNODE_GET_UNPACK(ARGS) DEFINE_MDNODE_GET_UNPACK_IMPL ARGS
#define DEFINE_MDNODE_GET_DISTINCT_TEMPORARY(CLASS, FORMAL, ARGS) \
static CLASS *getDistinct(LLVMContext &Context, \
DEFINE_MDNODE_GET_UNPACK(FORMAL)) { \
return getImpl(Context, DEFINE_MDNODE_GET_UNPACK(ARGS), Distinct); \
} \
static Temp##CLASS getTemporary(LLVMContext &Context, \
DEFINE_MDNODE_GET_UNPACK(FORMAL)) { \
return Temp##CLASS( \
getImpl(Context, DEFINE_MDNODE_GET_UNPACK(ARGS), Temporary)); \
}
#define DEFINE_MDNODE_GET(CLASS, FORMAL, ARGS) \
static CLASS *get(LLVMContext &Context, DEFINE_MDNODE_GET_UNPACK(FORMAL)) { \
return getImpl(Context, DEFINE_MDNODE_GET_UNPACK(ARGS), Uniqued); \
} \
static CLASS *getIfExists(LLVMContext &Context, \
DEFINE_MDNODE_GET_UNPACK(FORMAL)) { \
return getImpl(Context, DEFINE_MDNODE_GET_UNPACK(ARGS), Uniqued, \
/* ShouldCreate */ false); \
} \
DEFINE_MDNODE_GET_DISTINCT_TEMPORARY(CLASS, FORMAL, ARGS)
namespace llvm {
class DITypeRefArray {
const MDTuple *N = nullptr;
public:
DITypeRefArray() = default;
DITypeRefArray(const MDTuple *N) : N(N) {}
explicit operator bool() const { return get(); }
explicit operator MDTuple *() const { return get(); }
MDTuple *get() const { return const_cast<MDTuple *>(N); }
MDTuple *operator->() const { return get(); }
MDTuple &operator*() const { return *get(); }
// FIXME: Fix callers and remove condition on N.
unsigned size() const { return N ? N->getNumOperands() : 0u; }
DIType *operator[](unsigned I) const {
return cast_or_null<DIType>(N->getOperand(I));
}
class iterator : std::iterator<std::input_iterator_tag, DIType *,
std::ptrdiff_t, void, DIType *> {
MDNode::op_iterator I = nullptr;
public:
iterator() = default;
explicit iterator(MDNode::op_iterator I) : I(I) {}
DIType *operator*() const { return cast_or_null<DIType>(*I); }
iterator &operator++() {
++I;
return *this;
}
iterator operator++(int) {
iterator Temp(*this);
++I;
return Temp;
}
bool operator==(const iterator &X) const { return I == X.I; }
bool operator!=(const iterator &X) const { return I != X.I; }
};
// FIXME: Fix callers and remove condition on N.
iterator begin() const { return N ? iterator(N->op_begin()) : iterator(); }
iterator end() const { return N ? iterator(N->op_end()) : iterator(); }
};
/// Tagged DWARF-like metadata node.
///
/// A metadata node with a DWARF tag (i.e., a constant named \c DW_TAG_*,
/// defined in llvm/BinaryFormat/Dwarf.h). Called \a DINode because it's
/// potentially used for non-DWARF output.
class DINode : public MDNode {
friend class LLVMContextImpl;
friend class MDNode;
protected:
DINode(LLVMContext &C, unsigned ID, StorageType Storage, unsigned Tag,
ArrayRef<Metadata *> Ops1, ArrayRef<Metadata *> Ops2 = None)
: MDNode(C, ID, Storage, Ops1, Ops2) {
assert(Tag < 1u << 16);
SubclassData16 = Tag;
}
~DINode() = default;
template <class Ty> Ty *getOperandAs(unsigned I) const {
return cast_or_null<Ty>(getOperand(I));
}
StringRef getStringOperand(unsigned I) const {
if (auto *S = getOperandAs<MDString>(I))
return S->getString();
return StringRef();
}
static MDString *getCanonicalMDString(LLVMContext &Context, StringRef S) {
if (S.empty())
return nullptr;
return MDString::get(Context, S);
}
/// Allow subclasses to mutate the tag.
void setTag(unsigned Tag) { SubclassData16 = Tag; }
public:
unsigned getTag() const { return SubclassData16; }
/// Debug info flags.
///
/// The three accessibility flags are mutually exclusive and rolled together
/// in the first two bits.
enum DIFlags : uint32_t {
#define HANDLE_DI_FLAG(ID, NAME) Flag##NAME = ID,
#define DI_FLAG_LARGEST_NEEDED
#include "llvm/IR/DebugInfoFlags.def"
FlagAccessibility = FlagPrivate | FlagProtected | FlagPublic,
FlagPtrToMemberRep = FlagSingleInheritance | FlagMultipleInheritance |
FlagVirtualInheritance,
LLVM_MARK_AS_BITMASK_ENUM(FlagLargest)
};
static DIFlags getFlag(StringRef Flag);
static StringRef getFlagString(DIFlags Flag);
/// Split up a flags bitfield.
///
/// Split \c Flags into \c SplitFlags, a vector of its components. Returns
/// any remaining (unrecognized) bits.
static DIFlags splitFlags(DIFlags Flags,
SmallVectorImpl<DIFlags> &SplitFlags);
static bool classof(const Metadata *MD) {
switch (MD->getMetadataID()) {
default:
return false;
case GenericDINodeKind:
case DISubrangeKind:
case DIEnumeratorKind:
case DIBasicTypeKind:
case DIDerivedTypeKind:
case DICompositeTypeKind:
case DISubroutineTypeKind:
case DIFileKind:
case DICompileUnitKind:
case DISubprogramKind:
case DILexicalBlockKind:
case DILexicalBlockFileKind:
case DINamespaceKind:
case DICommonBlockKind:
case DITemplateTypeParameterKind:
case DITemplateValueParameterKind:
case DIGlobalVariableKind:
case DILocalVariableKind:
case DILabelKind:
case DIObjCPropertyKind:
case DIImportedEntityKind:
case DIModuleKind:
return true;
}
}
};
/// Generic tagged DWARF-like metadata node.
///
/// An un-specialized DWARF-like metadata node. The first operand is a
/// (possibly empty) null-separated \a MDString header that contains arbitrary
/// fields. The remaining operands are \a dwarf_operands(), and are pointers
/// to other metadata.
class GenericDINode : public DINode {
friend class LLVMContextImpl;
friend class MDNode;
GenericDINode(LLVMContext &C, StorageType Storage, unsigned Hash,
unsigned Tag, ArrayRef<Metadata *> Ops1,
ArrayRef<Metadata *> Ops2)
: DINode(C, GenericDINodeKind, Storage, Tag, Ops1, Ops2) {
setHash(Hash);
}
~GenericDINode() { dropAllReferences(); }
void setHash(unsigned Hash) { SubclassData32 = Hash; }
void recalculateHash();
static GenericDINode *getImpl(LLVMContext &Context, unsigned Tag,
StringRef Header, ArrayRef<Metadata *> DwarfOps,
StorageType Storage, bool ShouldCreate = true) {
return getImpl(Context, Tag, getCanonicalMDString(Context, Header),
DwarfOps, Storage, ShouldCreate);
}
static GenericDINode *getImpl(LLVMContext &Context, unsigned Tag,
MDString *Header, ArrayRef<Metadata *> DwarfOps,
StorageType Storage, bool ShouldCreate = true);
TempGenericDINode cloneImpl() const {
return getTemporary(
getContext(), getTag(), getHeader(),
SmallVector<Metadata *, 4>(dwarf_op_begin(), dwarf_op_end()));
}
public:
unsigned getHash() const { return SubclassData32; }
DEFINE_MDNODE_GET(GenericDINode, (unsigned Tag, StringRef Header,
ArrayRef<Metadata *> DwarfOps),
(Tag, Header, DwarfOps))
DEFINE_MDNODE_GET(GenericDINode, (unsigned Tag, MDString *Header,
ArrayRef<Metadata *> DwarfOps),
(Tag, Header, DwarfOps))
/// Return a (temporary) clone of this.
TempGenericDINode clone() const { return cloneImpl(); }
unsigned getTag() const { return SubclassData16; }
StringRef getHeader() const { return getStringOperand(0); }
MDString *getRawHeader() const { return getOperandAs<MDString>(0); }
op_iterator dwarf_op_begin() const { return op_begin() + 1; }
op_iterator dwarf_op_end() const { return op_end(); }
op_range dwarf_operands() const {
return op_range(dwarf_op_begin(), dwarf_op_end());
}
unsigned getNumDwarfOperands() const { return getNumOperands() - 1; }
const MDOperand &getDwarfOperand(unsigned I) const {
return getOperand(I + 1);
}
void replaceDwarfOperandWith(unsigned I, Metadata *New) {
replaceOperandWith(I + 1, New);
}
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == GenericDINodeKind;
}
};
/// Array subrange.
///
/// TODO: Merge into node for DW_TAG_array_type, which should have a custom
/// type.
class DISubrange : public DINode {
friend class LLVMContextImpl;
friend class MDNode;
int64_t LowerBound;
DISubrange(LLVMContext &C, StorageType Storage, Metadata *Node,
int64_t LowerBound, ArrayRef<Metadata *> Ops)
: DINode(C, DISubrangeKind, Storage, dwarf::DW_TAG_subrange_type, Ops),
LowerBound(LowerBound) {}
~DISubrange() = default;
static DISubrange *getImpl(LLVMContext &Context, int64_t Count,
int64_t LowerBound, StorageType Storage,
bool ShouldCreate = true);
static DISubrange *getImpl(LLVMContext &Context, Metadata *CountNode,
int64_t LowerBound, StorageType Storage,
bool ShouldCreate = true);
TempDISubrange cloneImpl() const {
return getTemporary(getContext(), getRawCountNode(), getLowerBound());
}
public:
DEFINE_MDNODE_GET(DISubrange, (int64_t Count, int64_t LowerBound = 0),
(Count, LowerBound))
DEFINE_MDNODE_GET(DISubrange, (Metadata *CountNode, int64_t LowerBound = 0),
(CountNode, LowerBound))
TempDISubrange clone() const { return cloneImpl(); }
int64_t getLowerBound() const { return LowerBound; }
Metadata *getRawCountNode() const {
return getOperand(0).get();
}
typedef PointerUnion<ConstantInt*, DIVariable*> CountType;
CountType getCount() const {
if (auto *MD = dyn_cast<ConstantAsMetadata>(getRawCountNode()))
return CountType(cast<ConstantInt>(MD->getValue()));
if (auto *DV = dyn_cast<DIVariable>(getRawCountNode()))
return CountType(DV);
return CountType();
}
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == DISubrangeKind;
}
};
/// Enumeration value.
///
/// TODO: Add a pointer to the context (DW_TAG_enumeration_type) once that no
/// longer creates a type cycle.
class DIEnumerator : public DINode {
friend class LLVMContextImpl;
friend class MDNode;
int64_t Value;
DIEnumerator(LLVMContext &C, StorageType Storage, int64_t Value,
bool IsUnsigned, ArrayRef<Metadata *> Ops)
: DINode(C, DIEnumeratorKind, Storage, dwarf::DW_TAG_enumerator, Ops),
Value(Value) {
SubclassData32 = IsUnsigned;
}
~DIEnumerator() = default;
static DIEnumerator *getImpl(LLVMContext &Context, int64_t Value,
bool IsUnsigned, StringRef Name,
StorageType Storage, bool ShouldCreate = true) {
return getImpl(Context, Value, IsUnsigned,
getCanonicalMDString(Context, Name), Storage, ShouldCreate);
}
static DIEnumerator *getImpl(LLVMContext &Context, int64_t Value,
bool IsUnsigned, MDString *Name,
StorageType Storage, bool ShouldCreate = true);
TempDIEnumerator cloneImpl() const {
return getTemporary(getContext(), getValue(), isUnsigned(), getName());
}
public:
DEFINE_MDNODE_GET(DIEnumerator, (int64_t Value, bool IsUnsigned, StringRef Name),
(Value, IsUnsigned, Name))
DEFINE_MDNODE_GET(DIEnumerator, (int64_t Value, bool IsUnsigned, MDString *Name),
(Value, IsUnsigned, Name))
TempDIEnumerator clone() const { return cloneImpl(); }
int64_t getValue() const { return Value; }
bool isUnsigned() const { return SubclassData32; }
StringRef getName() const { return getStringOperand(0); }
MDString *getRawName() const { return getOperandAs<MDString>(0); }
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == DIEnumeratorKind;
}
};
/// Base class for scope-like contexts.
///
/// Base class for lexical scopes and types (which are also declaration
/// contexts).
///
/// TODO: Separate the concepts of declaration contexts and lexical scopes.
class DIScope : public DINode {
protected:
DIScope(LLVMContext &C, unsigned ID, StorageType Storage, unsigned Tag,
ArrayRef<Metadata *> Ops)
: DINode(C, ID, Storage, Tag, Ops) {}
~DIScope() = default;
public:
DIFile *getFile() const { return cast_or_null<DIFile>(getRawFile()); }
inline StringRef getFilename() const;
inline StringRef getDirectory() const;
inline Optional<StringRef> getSource() const;
StringRef getName() const;
DIScope *getScope() const;
/// Return the raw underlying file.
///
/// A \a DIFile is a \a DIScope, but it doesn't point at a separate file (it
/// \em is the file). If \c this is an \a DIFile, we need to return \c this.
/// Otherwise, return the first operand, which is where all other subclasses
/// store their file pointer.
Metadata *getRawFile() const {
return isa<DIFile>(this) ? const_cast<DIScope *>(this)
: static_cast<Metadata *>(getOperand(0));
}
static bool classof(const Metadata *MD) {
switch (MD->getMetadataID()) {
default:
return false;
case DIBasicTypeKind:
case DIDerivedTypeKind:
case DICompositeTypeKind:
case DISubroutineTypeKind:
case DIFileKind:
case DICompileUnitKind:
case DISubprogramKind:
case DILexicalBlockKind:
case DILexicalBlockFileKind:
case DINamespaceKind:
case DICommonBlockKind:
case DIModuleKind:
return true;
}
}
};
/// File.
///
/// TODO: Merge with directory/file node (including users).
/// TODO: Canonicalize paths on creation.
class DIFile : public DIScope {
friend class LLVMContextImpl;
friend class MDNode;
public:
/// Which algorithm (e.g. MD5) a checksum was generated with.
///
/// The encoding is explicit because it is used directly in Bitcode. The
/// value 0 is reserved to indicate the absence of a checksum in Bitcode.
enum ChecksumKind {
// The first variant was originally CSK_None, encoded as 0. The new
// internal representation removes the need for this by wrapping the
// ChecksumInfo in an Optional, but to preserve Bitcode compatibility the 0
// encoding is reserved.
CSK_MD5 = 1,
CSK_SHA1 = 2,
CSK_Last = CSK_SHA1 // Should be last enumeration.
};
/// A single checksum, represented by a \a Kind and a \a Value (a string).
template <typename T>
struct ChecksumInfo {
/// The kind of checksum which \a Value encodes.
ChecksumKind Kind;
/// The string value of the checksum.
T Value;
ChecksumInfo(ChecksumKind Kind, T Value) : Kind(Kind), Value(Value) { }
~ChecksumInfo() = default;
bool operator==(const ChecksumInfo<T> &X) const {
return Kind == X.Kind && Value == X.Value;
}
bool operator!=(const ChecksumInfo<T> &X) const { return !(*this == X); }
StringRef getKindAsString() const { return getChecksumKindAsString(Kind); }
};
private:
Optional<ChecksumInfo<MDString *>> Checksum;
Optional<MDString *> Source;
DIFile(LLVMContext &C, StorageType Storage,
Optional<ChecksumInfo<MDString *>> CS, Optional<MDString *> Src,
ArrayRef<Metadata *> Ops)
: DIScope(C, DIFileKind, Storage, dwarf::DW_TAG_file_type, Ops),
Checksum(CS), Source(Src) {}
~DIFile() = default;
static DIFile *getImpl(LLVMContext &Context, StringRef Filename,
StringRef Directory,
Optional<ChecksumInfo<StringRef>> CS,
Optional<StringRef> Source,
StorageType Storage, bool ShouldCreate = true) {
Optional<ChecksumInfo<MDString *>> MDChecksum;
if (CS)
MDChecksum.emplace(CS->Kind, getCanonicalMDString(Context, CS->Value));
return getImpl(Context, getCanonicalMDString(Context, Filename),
getCanonicalMDString(Context, Directory), MDChecksum,
Source ? Optional<MDString *>(getCanonicalMDString(Context, *Source)) : None,
Storage, ShouldCreate);
}
static DIFile *getImpl(LLVMContext &Context, MDString *Filename,
MDString *Directory,
Optional<ChecksumInfo<MDString *>> CS,
Optional<MDString *> Source, StorageType Storage,
bool ShouldCreate = true);
TempDIFile cloneImpl() const {
return getTemporary(getContext(), getFilename(), getDirectory(),
getChecksum(), getSource());
}
public:
DEFINE_MDNODE_GET(DIFile, (StringRef Filename, StringRef Directory,
Optional<ChecksumInfo<StringRef>> CS = None,
Optional<StringRef> Source = None),
(Filename, Directory, CS, Source))
DEFINE_MDNODE_GET(DIFile, (MDString * Filename, MDString *Directory,
Optional<ChecksumInfo<MDString *>> CS = None,
Optional<MDString *> Source = None),
(Filename, Directory, CS, Source))
TempDIFile clone() const { return cloneImpl(); }
StringRef getFilename() const { return getStringOperand(0); }
StringRef getDirectory() const { return getStringOperand(1); }
Optional<ChecksumInfo<StringRef>> getChecksum() const {
Optional<ChecksumInfo<StringRef>> StringRefChecksum;
if (Checksum)
StringRefChecksum.emplace(Checksum->Kind, Checksum->Value->getString());
return StringRefChecksum;
}
Optional<StringRef> getSource() const {
return Source ? Optional<StringRef>((*Source)->getString()) : None;
}
MDString *getRawFilename() const { return getOperandAs<MDString>(0); }
MDString *getRawDirectory() const { return getOperandAs<MDString>(1); }
Optional<ChecksumInfo<MDString *>> getRawChecksum() const { return Checksum; }
Optional<MDString *> getRawSource() const { return Source; }
static StringRef getChecksumKindAsString(ChecksumKind CSKind);
static Optional<ChecksumKind> getChecksumKind(StringRef CSKindStr);
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == DIFileKind;
}
};
StringRef DIScope::getFilename() const {
if (auto *F = getFile())
return F->getFilename();
return "";
}
StringRef DIScope::getDirectory() const {
if (auto *F = getFile())
return F->getDirectory();
return "";
}
Optional<StringRef> DIScope::getSource() const {
if (auto *F = getFile())
return F->getSource();
return None;
}
/// Base class for types.
///
/// TODO: Remove the hardcoded name and context, since many types don't use
/// them.
/// TODO: Split up flags.
class DIType : public DIScope {
unsigned Line;
DIFlags Flags;
uint64_t SizeInBits;
uint64_t OffsetInBits;
uint32_t AlignInBits;
protected:
DIType(LLVMContext &C, unsigned ID, StorageType Storage, unsigned Tag,
unsigned Line, uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, DIFlags Flags, ArrayRef<Metadata *> Ops)
: DIScope(C, ID, Storage, Tag, Ops) {
init(Line, SizeInBits, AlignInBits, OffsetInBits, Flags);
}
~DIType() = default;
void init(unsigned Line, uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, DIFlags Flags) {
this->Line = Line;
this->Flags = Flags;
this->SizeInBits = SizeInBits;
this->AlignInBits = AlignInBits;
this->OffsetInBits = OffsetInBits;
}
/// Change fields in place.
void mutate(unsigned Tag, unsigned Line, uint64_t SizeInBits,
uint32_t AlignInBits, uint64_t OffsetInBits, DIFlags Flags) {
assert(isDistinct() && "Only distinct nodes can mutate");
setTag(Tag);
init(Line, SizeInBits, AlignInBits, OffsetInBits, Flags);
}
public:
TempDIType clone() const {
return TempDIType(cast<DIType>(MDNode::clone().release()));
}
unsigned getLine() const { return Line; }
uint64_t getSizeInBits() const { return SizeInBits; }
uint32_t getAlignInBits() const { return AlignInBits; }
uint32_t getAlignInBytes() const { return getAlignInBits() / CHAR_BIT; }
uint64_t getOffsetInBits() const { return OffsetInBits; }
DIFlags getFlags() const { return Flags; }
DIScope *getScope() const { return cast_or_null<DIScope>(getRawScope()); }
StringRef getName() const { return getStringOperand(2); }
Metadata *getRawScope() const { return getOperand(1); }
MDString *getRawName() const { return getOperandAs<MDString>(2); }
/// Returns a new temporary DIType with updated Flags
TempDIType cloneWithFlags(DIFlags NewFlags) const {
auto NewTy = clone();
NewTy->Flags = NewFlags;
return NewTy;
}
bool isPrivate() const {
return (getFlags() & FlagAccessibility) == FlagPrivate;
}
bool isProtected() const {
return (getFlags() & FlagAccessibility) == FlagProtected;
}
bool isPublic() const {
return (getFlags() & FlagAccessibility) == FlagPublic;
}
bool isForwardDecl() const { return getFlags() & FlagFwdDecl; }
bool isAppleBlockExtension() const { return getFlags() & FlagAppleBlock; }
bool isVirtual() const { return getFlags() & FlagVirtual; }
bool isArtificial() const { return getFlags() & FlagArtificial; }
bool isObjectPointer() const { return getFlags() & FlagObjectPointer; }
bool isObjcClassComplete() const {
return getFlags() & FlagObjcClassComplete;
}
bool isVector() const { return getFlags() & FlagVector; }
bool isBitField() const { return getFlags() & FlagBitField; }
bool isStaticMember() const { return getFlags() & FlagStaticMember; }
bool isLValueReference() const { return getFlags() & FlagLValueReference; }
bool isRValueReference() const { return getFlags() & FlagRValueReference; }
bool isTypePassByValue() const { return getFlags() & FlagTypePassByValue; }
bool isTypePassByReference() const {
return getFlags() & FlagTypePassByReference;
}
bool isBigEndian() const { return getFlags() & FlagBigEndian; }
bool isLittleEndian() const { return getFlags() & FlagLittleEndian; }
bool getExportSymbols() const { return getFlags() & FlagExportSymbols; }
static bool classof(const Metadata *MD) {
switch (MD->getMetadataID()) {
default:
return false;
case DIBasicTypeKind:
case DIDerivedTypeKind:
case DICompositeTypeKind:
case DISubroutineTypeKind:
return true;
}
}
};
/// Basic type, like 'int' or 'float'.
///
/// TODO: Split out DW_TAG_unspecified_type.
/// TODO: Drop unused accessors.
class DIBasicType : public DIType {
friend class LLVMContextImpl;
friend class MDNode;
unsigned Encoding;
DIBasicType(LLVMContext &C, StorageType Storage, unsigned Tag,
uint64_t SizeInBits, uint32_t AlignInBits, unsigned Encoding,
DIFlags Flags, ArrayRef<Metadata *> Ops)
: DIType(C, DIBasicTypeKind, Storage, Tag, 0, SizeInBits, AlignInBits, 0,
Flags, Ops),
Encoding(Encoding) {}
~DIBasicType() = default;
static DIBasicType *getImpl(LLVMContext &Context, unsigned Tag,
StringRef Name, uint64_t SizeInBits,
uint32_t AlignInBits, unsigned Encoding,
DIFlags Flags, StorageType Storage,
bool ShouldCreate = true) {
return getImpl(Context, Tag, getCanonicalMDString(Context, Name),
SizeInBits, AlignInBits, Encoding, Flags, Storage,
ShouldCreate);
}
static DIBasicType *getImpl(LLVMContext &Context, unsigned Tag,
MDString *Name, uint64_t SizeInBits,
uint32_t AlignInBits, unsigned Encoding,
DIFlags Flags, StorageType Storage,
bool ShouldCreate = true);
TempDIBasicType cloneImpl() const {
return getTemporary(getContext(), getTag(), getName(), getSizeInBits(),
getAlignInBits(), getEncoding(), getFlags());
}
public:
DEFINE_MDNODE_GET(DIBasicType, (unsigned Tag, StringRef Name),
(Tag, Name, 0, 0, 0, FlagZero))
DEFINE_MDNODE_GET(DIBasicType,
(unsigned Tag, StringRef Name, uint64_t SizeInBits,
uint32_t AlignInBits, unsigned Encoding, DIFlags Flags),
(Tag, Name, SizeInBits, AlignInBits, Encoding, Flags))
DEFINE_MDNODE_GET(DIBasicType,
(unsigned Tag, MDString *Name, uint64_t SizeInBits,
uint32_t AlignInBits, unsigned Encoding, DIFlags Flags),
(Tag, Name, SizeInBits, AlignInBits, Encoding, Flags))
TempDIBasicType clone() const { return cloneImpl(); }
unsigned getEncoding() const { return Encoding; }
enum class Signedness { Signed, Unsigned };
/// Return the signedness of this type, or None if this type is neither
/// signed nor unsigned.
Optional<Signedness> getSignedness() const;
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == DIBasicTypeKind;
}
};
/// Derived types.
///
/// This includes qualified types, pointers, references, friends, typedefs, and
/// class members.
///
/// TODO: Split out members (inheritance, fields, methods, etc.).
class DIDerivedType : public DIType {
friend class LLVMContextImpl;
friend class MDNode;
/// The DWARF address space of the memory pointed to or referenced by a
/// pointer or reference type respectively.
Optional<unsigned> DWARFAddressSpace;
DIDerivedType(LLVMContext &C, StorageType Storage, unsigned Tag,
unsigned Line, uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, Optional<unsigned> DWARFAddressSpace,
DIFlags Flags, ArrayRef<Metadata *> Ops)
: DIType(C, DIDerivedTypeKind, Storage, Tag, Line, SizeInBits,
AlignInBits, OffsetInBits, Flags, Ops),
DWARFAddressSpace(DWARFAddressSpace) {}
~DIDerivedType() = default;
static DIDerivedType *
getImpl(LLVMContext &Context, unsigned Tag, StringRef Name, DIFile *File,
unsigned Line, DIScope *Scope, DIType *BaseType, uint64_t SizeInBits,
uint32_t AlignInBits, uint64_t OffsetInBits,
Optional<unsigned> DWARFAddressSpace, DIFlags Flags,
Metadata *ExtraData, StorageType Storage, bool ShouldCreate = true) {
return getImpl(Context, Tag, getCanonicalMDString(Context, Name), File,
Line, Scope, BaseType, SizeInBits, AlignInBits, OffsetInBits,
DWARFAddressSpace, Flags, ExtraData, Storage, ShouldCreate);
}
static DIDerivedType *getImpl(LLVMContext &Context, unsigned Tag,
MDString *Name, Metadata *File, unsigned Line,
Metadata *Scope, Metadata *BaseType,
uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits,
Optional<unsigned> DWARFAddressSpace,
DIFlags Flags, Metadata *ExtraData,
StorageType Storage, bool ShouldCreate = true);
TempDIDerivedType cloneImpl() const {
return getTemporary(getContext(), getTag(), getName(), getFile(), getLine(),
getScope(), getBaseType(), getSizeInBits(),
getAlignInBits(), getOffsetInBits(),
getDWARFAddressSpace(), getFlags(), getExtraData());
}
public:
DEFINE_MDNODE_GET(DIDerivedType,
(unsigned Tag, MDString *Name, Metadata *File,
unsigned Line, Metadata *Scope, Metadata *BaseType,
uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits,
Optional<unsigned> DWARFAddressSpace, DIFlags Flags,
Metadata *ExtraData = nullptr),
(Tag, Name, File, Line, Scope, BaseType, SizeInBits,
AlignInBits, OffsetInBits, DWARFAddressSpace, Flags,
ExtraData))
DEFINE_MDNODE_GET(DIDerivedType,
(unsigned Tag, StringRef Name, DIFile *File, unsigned Line,
DIScope *Scope, DIType *BaseType, uint64_t SizeInBits,
uint32_t AlignInBits, uint64_t OffsetInBits,
Optional<unsigned> DWARFAddressSpace, DIFlags Flags,
Metadata *ExtraData = nullptr),
(Tag, Name, File, Line, Scope, BaseType, SizeInBits,
AlignInBits, OffsetInBits, DWARFAddressSpace, Flags,
ExtraData))
TempDIDerivedType clone() const { return cloneImpl(); }
/// Get the base type this is derived from.
DIType *getBaseType() const { return cast_or_null<DIType>(getRawBaseType()); }
Metadata *getRawBaseType() const { return getOperand(3); }
/// \returns The DWARF address space of the memory pointed to or referenced by
/// a pointer or reference type respectively.
Optional<unsigned> getDWARFAddressSpace() const { return DWARFAddressSpace; }
/// Get extra data associated with this derived type.
///
/// Class type for pointer-to-members, objective-c property node for ivars,
/// global constant wrapper for static members, or virtual base pointer offset
/// for inheritance.
///
/// TODO: Separate out types that need this extra operand: pointer-to-member
/// types and member fields (static members and ivars).
Metadata *getExtraData() const { return getRawExtraData(); }
Metadata *getRawExtraData() const { return getOperand(4); }
/// Get casted version of extra data.
/// @{
DIType *getClassType() const {
assert(getTag() == dwarf::DW_TAG_ptr_to_member_type);
return cast_or_null<DIType>(getExtraData());
}
DIObjCProperty *getObjCProperty() const {
return dyn_cast_or_null<DIObjCProperty>(getExtraData());
}
uint32_t getVBPtrOffset() const {
assert(getTag() == dwarf::DW_TAG_inheritance);
if (auto *CM = cast_or_null<ConstantAsMetadata>(getExtraData()))
if (auto *CI = dyn_cast_or_null<ConstantInt>(CM->getValue()))
return static_cast<uint32_t>(CI->getZExtValue());
return 0;
}
Constant *getStorageOffsetInBits() const {
assert(getTag() == dwarf::DW_TAG_member && isBitField());
if (auto *C = cast_or_null<ConstantAsMetadata>(getExtraData()))
return C->getValue();
return nullptr;
}
Constant *getConstant() const {
assert(getTag() == dwarf::DW_TAG_member && isStaticMember());
if (auto *C = cast_or_null<ConstantAsMetadata>(getExtraData()))
return C->getValue();
return nullptr;
}
Constant *getDiscriminantValue() const {
assert(getTag() == dwarf::DW_TAG_member && !isStaticMember());
if (auto *C = cast_or_null<ConstantAsMetadata>(getExtraData()))
return C->getValue();
return nullptr;
}
/// @}
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == DIDerivedTypeKind;
}
};
/// Composite types.
///
/// TODO: Detach from DerivedTypeBase (split out MDEnumType?).
/// TODO: Create a custom, unrelated node for DW_TAG_array_type.
class DICompositeType : public DIType {
friend class LLVMContextImpl;
friend class MDNode;
unsigned RuntimeLang;
DICompositeType(LLVMContext &C, StorageType Storage, unsigned Tag,
unsigned Line, unsigned RuntimeLang, uint64_t SizeInBits,
uint32_t AlignInBits, uint64_t OffsetInBits, DIFlags Flags,
ArrayRef<Metadata *> Ops)
: DIType(C, DICompositeTypeKind, Storage, Tag, Line, SizeInBits,
AlignInBits, OffsetInBits, Flags, Ops),
RuntimeLang(RuntimeLang) {}
~DICompositeType() = default;
/// Change fields in place.
void mutate(unsigned Tag, unsigned Line, unsigned RuntimeLang,
uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, DIFlags Flags) {
assert(isDistinct() && "Only distinct nodes can mutate");
assert(getRawIdentifier() && "Only ODR-uniqued nodes should mutate");
this->RuntimeLang = RuntimeLang;
DIType::mutate(Tag, Line, SizeInBits, AlignInBits, OffsetInBits, Flags);
}
static DICompositeType *
getImpl(LLVMContext &Context, unsigned Tag, StringRef Name, Metadata *File,
unsigned Line, DIScope *Scope, DIType *BaseType, uint64_t SizeInBits,
uint32_t AlignInBits, uint64_t OffsetInBits, DIFlags Flags,
DINodeArray Elements, unsigned RuntimeLang, DIType *VTableHolder,
DITemplateParameterArray TemplateParams, StringRef Identifier,
DIDerivedType *Discriminator, StorageType Storage,
bool ShouldCreate = true) {
return getImpl(
Context, Tag, getCanonicalMDString(Context, Name), File, Line, Scope,
BaseType, SizeInBits, AlignInBits, OffsetInBits, Flags, Elements.get(),
RuntimeLang, VTableHolder, TemplateParams.get(),
getCanonicalMDString(Context, Identifier), Discriminator, Storage, ShouldCreate);
}
static DICompositeType *
getImpl(LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
unsigned Line, Metadata *Scope, Metadata *BaseType,
uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits,
DIFlags Flags, Metadata *Elements, unsigned RuntimeLang,
Metadata *VTableHolder, Metadata *TemplateParams,
MDString *Identifier, Metadata *Discriminator,
StorageType Storage, bool ShouldCreate = true);
TempDICompositeType cloneImpl() const {
return getTemporary(getContext(), getTag(), getName(), getFile(), getLine(),
getScope(), getBaseType(), getSizeInBits(),
getAlignInBits(), getOffsetInBits(), getFlags(),
getElements(), getRuntimeLang(), getVTableHolder(),
getTemplateParams(), getIdentifier(), getDiscriminator());
}
public:
DEFINE_MDNODE_GET(DICompositeType,
(unsigned Tag, StringRef Name, DIFile *File, unsigned Line,
DIScope *Scope, DIType *BaseType, uint64_t SizeInBits,
uint32_t AlignInBits, uint64_t OffsetInBits, DIFlags Flags,
DINodeArray Elements, unsigned RuntimeLang,
DIType *VTableHolder,
DITemplateParameterArray TemplateParams = nullptr,
StringRef Identifier = "",
DIDerivedType *Discriminator = nullptr),
(Tag, Name, File, Line, Scope, BaseType, SizeInBits,
AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang,
VTableHolder, TemplateParams, Identifier, Discriminator))
DEFINE_MDNODE_GET(DICompositeType,
(unsigned Tag, MDString *Name, Metadata *File,
unsigned Line, Metadata *Scope, Metadata *BaseType,
uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, DIFlags Flags, Metadata *Elements,
unsigned RuntimeLang, Metadata *VTableHolder,
Metadata *TemplateParams = nullptr,
MDString *Identifier = nullptr,
Metadata *Discriminator = nullptr),
(Tag, Name, File, Line, Scope, BaseType, SizeInBits,
AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang,
VTableHolder, TemplateParams, Identifier, Discriminator))
TempDICompositeType clone() const { return cloneImpl(); }
/// Get a DICompositeType with the given ODR identifier.
///
/// If \a LLVMContext::isODRUniquingDebugTypes(), gets the mapped
/// DICompositeType for the given ODR \c Identifier. If none exists, creates
/// a new node.
///
/// Else, returns \c nullptr.
static DICompositeType *
getODRType(LLVMContext &Context, MDString &Identifier, unsigned Tag,
MDString *Name, Metadata *File, unsigned Line, Metadata *Scope,
Metadata *BaseType, uint64_t SizeInBits, uint32_t AlignInBits,
uint64_t OffsetInBits, DIFlags Flags, Metadata *Elements,
unsigned RuntimeLang, Metadata *VTableHolder,
Metadata *TemplateParams, Metadata *Discriminator);
static DICompositeType *getODRTypeIfExists(LLVMContext &Context,
MDString &Identifier);
/// Build a DICompositeType with the given ODR identifier.
///
/// Looks up the mapped DICompositeType for the given ODR \c Identifier. If
/// it doesn't exist, creates a new one. If it does exist and \a
/// isForwardDecl(), and the new arguments would be a definition, mutates the
/// the type in place. In either case, returns the type.
///
/// If not \a LLVMContext::isODRUniquingDebugTypes(), this function returns
/// nullptr.
static DICompositeType *