Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/DebugInfo/DWARF/DWARFUnit.h
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//===- DWARFUnit.h ----------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_DWARF_DWARFUNIT_H
10
#define LLVM_DEBUGINFO_DWARF_DWARFUNIT_H
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#include "llvm/ADT/Optional.h"
13
#include "llvm/ADT/STLExtras.h"
14
#include "llvm/ADT/SmallVector.h"
15
#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/iterator_range.h"
17
#include "llvm/BinaryFormat/Dwarf.h"
18
#include "llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h"
19
#include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
20
#include "llvm/DebugInfo/DWARF/DWARFDebugRnglists.h"
21
#include "llvm/DebugInfo/DWARF/DWARFDie.h"
22
#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
23
#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
24
#include "llvm/DebugInfo/DWARF/DWARFSection.h"
25
#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
26
#include "llvm/Support/DataExtractor.h"
27
#include <algorithm>
28
#include <cassert>
29
#include <cstddef>
30
#include <cstdint>
31
#include <map>
32
#include <memory>
33
#include <utility>
34
#include <vector>
35
36
namespace llvm {
37
38
class DWARFAbbreviationDeclarationSet;
39
class DWARFContext;
40
class DWARFDebugAbbrev;
41
class DWARFUnit;
42
43
/// Base class describing the header of any kind of "unit."  Some information
44
/// is specific to certain unit types.  We separate this class out so we can
45
/// parse the header before deciding what specific kind of unit to construct.
46
class DWARFUnitHeader {
47
  // Offset within section.
48
  uint32_t Offset = 0;
49
  // Version, address size, and DWARF format.
50
  dwarf::FormParams FormParams;
51
  uint64_t Length = 0;
52
  uint64_t AbbrOffset = 0;
53
54
  // For DWO units only.
55
  const DWARFUnitIndex::Entry *IndexEntry = nullptr;
56
57
  // For type units only.
58
  uint64_t TypeHash = 0;
59
  uint32_t TypeOffset = 0;
60
61
  // For v5 split or skeleton compile units only.
62
  Optional<uint64_t> DWOId;
63
64
  // Unit type as parsed, or derived from the section kind.
65
  uint8_t UnitType = 0;
66
67
  // Size as parsed. uint8_t for compactness.
68
  uint8_t Size = 0;
69
70
public:
71
  /// Parse a unit header from \p debug_info starting at \p offset_ptr.
72
  bool extract(DWARFContext &Context, const DWARFDataExtractor &debug_info,
73
               uint32_t *offset_ptr, DWARFSectionKind Kind = DW_SECT_INFO,
74
               const DWARFUnitIndex *Index = nullptr,
75
               const DWARFUnitIndex::Entry *Entry = nullptr);
76
19.1k
  uint32_t getOffset() const { return Offset; }
77
135k
  const dwarf::FormParams &getFormParams() const { return FormParams; }
78
16.9k
  uint16_t getVersion() const { return FormParams.Version; }
79
125
  dwarf::DwarfFormat getFormat() const { return FormParams.Format; }
80
87.7k
  uint8_t getAddressByteSize() const { return FormParams.AddrSize; }
81
481
  uint8_t getRefAddrByteSize() const { return FormParams.getRefAddrByteSize(); }
82
5.44k
  uint8_t getDwarfOffsetByteSize() const {
83
5.44k
    return FormParams.getDwarfOffsetByteSize();
84
5.44k
  }
85
2.81k
  uint64_t getLength() const { return Length; }
86
2.10k
  uint64_t getAbbrOffset() const { return AbbrOffset; }
87
49
  Optional<uint64_t> getDWOId() const { return DWOId; }
88
161
  void setDWOId(uint64_t Id) {
89
161
    assert((!DWOId || *DWOId == Id) && "setting DWOId to a different value");
90
161
    DWOId = Id;
91
161
  }
92
4.10k
  const DWARFUnitIndex::Entry *getIndexEntry() const { return IndexEntry; }
93
60
  uint64_t getTypeHash() const { return TypeHash; }
94
118
  uint32_t getTypeOffset() const { return TypeOffset; }
95
289
  uint8_t getUnitType() const { return UnitType; }
96
7.33k
  bool isTypeUnit() const {
97
7.33k
    return UnitType == dwarf::DW_UT_type || 
UnitType == dwarf::DW_UT_split_type7.14k
;
98
7.33k
  }
99
4.32k
  uint8_t getSize() const { return Size; }
100
15.0k
  uint32_t getNextUnitOffset() const {
101
15.0k
    return Offset + Length +
102
15.0k
           (FormParams.Format == llvm::dwarf::DwarfFormat::DWARF64 ? 
432
:
015.0k
) +
103
15.0k
           FormParams.getDwarfOffsetByteSize();
104
15.0k
  }
105
};
106
107
const DWARFUnitIndex &getDWARFUnitIndex(DWARFContext &Context,
108
                                        DWARFSectionKind Kind);
109
110
/// Describe a collection of units. Intended to hold all units either from
111
/// .debug_info and .debug_types, or from .debug_info.dwo and .debug_types.dwo.
112
class DWARFUnitVector final : public SmallVector<std::unique_ptr<DWARFUnit>, 1> {
113
  std::function<std::unique_ptr<DWARFUnit>(uint32_t, DWARFSectionKind,
114
                                           const DWARFSection *,
115
                                           const DWARFUnitIndex::Entry *)>
116
      Parser;
117
  int NumInfoUnits = -1;
118
119
public:
120
  using UnitVector = SmallVectorImpl<std::unique_ptr<DWARFUnit>>;
121
  using iterator = typename UnitVector::iterator;
122
  using iterator_range = llvm::iterator_range<typename UnitVector::iterator>;
123
124
  DWARFUnit *getUnitForOffset(uint32_t Offset) const;
125
  DWARFUnit *getUnitForIndexEntry(const DWARFUnitIndex::Entry &E);
126
127
  /// Read units from a .debug_info or .debug_types section.  Calls made
128
  /// before finishedInfoUnits() are assumed to be for .debug_info sections,
129
  /// calls after finishedInfoUnits() are for .debug_types sections.  Caller
130
  /// must not mix calls to addUnitsForSection and addUnitsForDWOSection.
131
  void addUnitsForSection(DWARFContext &C, const DWARFSection &Section,
132
                          DWARFSectionKind SectionKind);
133
  /// Read units from a .debug_info.dwo or .debug_types.dwo section.  Calls
134
  /// made before finishedInfoUnits() are assumed to be for .debug_info.dwo
135
  /// sections, calls after finishedInfoUnits() are for .debug_types.dwo
136
  /// sections.  Caller must not mix calls to addUnitsForSection and
137
  /// addUnitsForDWOSection.
138
  void addUnitsForDWOSection(DWARFContext &C, const DWARFSection &DWOSection,
139
                             DWARFSectionKind SectionKind, bool Lazy = false);
140
141
  /// Add an existing DWARFUnit to this UnitVector. This is used by the DWARF
142
  /// verifier to process unit separately.
143
  DWARFUnit *addUnit(std::unique_ptr<DWARFUnit> Unit);
144
145
  /// Returns number of all units held by this instance.
146
0
  unsigned getNumUnits() const { return size(); }
147
  /// Returns number of units from all .debug_info[.dwo] sections.
148
5.84k
  unsigned getNumInfoUnits() const {
149
5.84k
    return NumInfoUnits == -1 ? 
size()39
:
NumInfoUnits5.80k
;
150
5.84k
  }
151
  /// Returns number of units from all .debug_types[.dwo] sections.
152
434
  unsigned getNumTypesUnits() const { return size() - NumInfoUnits; }
153
  /// Indicate that parsing .debug_info[.dwo] is done, and remaining units
154
  /// will be from .debug_types[.dwo].
155
2.54k
  void finishedInfoUnits() { NumInfoUnits = size(); }
156
157
private:
158
  void addUnitsImpl(DWARFContext &Context, const DWARFObject &Obj,
159
                    const DWARFSection &Section, const DWARFDebugAbbrev *DA,
160
                    const DWARFSection *RS, const DWARFSection *LocSection,
161
                    StringRef SS, const DWARFSection &SOS,
162
                    const DWARFSection *AOS, const DWARFSection &LS, bool LE,
163
                    bool IsDWO, bool Lazy, DWARFSectionKind SectionKind);
164
};
165
166
/// Represents base address of the CU.
167
/// Represents a unit's contribution to the string offsets table.
168
struct StrOffsetsContributionDescriptor {
169
  uint64_t Base = 0;
170
  /// The contribution size not including the header.
171
  uint64_t Size = 0;
172
  /// Format and version.
173
  dwarf::FormParams FormParams = {0, 0, dwarf::DwarfFormat::DWARF32};
174
175
  StrOffsetsContributionDescriptor(uint64_t Base, uint64_t Size,
176
                                   uint8_t Version, dwarf::DwarfFormat Format)
177
175
      : Base(Base), Size(Size), FormParams({Version, 0, Format}) {}
178
106
  StrOffsetsContributionDescriptor() = default;
179
180
37
  uint8_t getVersion() const { return FormParams.Version; }
181
37
  dwarf::DwarfFormat getFormat() const { return FormParams.Format; }
182
1.77k
  uint8_t getDwarfOffsetByteSize() const {
183
1.77k
    return FormParams.getDwarfOffsetByteSize();
184
1.77k
  }
185
  /// Determine whether a contribution to the string offsets table is
186
  /// consistent with the relevant section size and that its length is
187
  /// a multiple of the size of one of its entries.
188
  Expected<StrOffsetsContributionDescriptor>
189
  validateContributionSize(DWARFDataExtractor &DA);
190
};
191
192
class DWARFUnit {
193
  DWARFContext &Context;
194
  /// Section containing this DWARFUnit.
195
  const DWARFSection &InfoSection;
196
197
  DWARFUnitHeader Header;
198
  const DWARFDebugAbbrev *Abbrev;
199
  const DWARFSection *RangeSection;
200
  uint32_t RangeSectionBase;
201
  /// We either keep track of the location list section or its data, depending
202
  /// on whether we are handling a split DWARF section or not.
203
  union {
204
    const DWARFSection *LocSection;
205
    StringRef LocSectionData;
206
  };
207
  const DWARFSection &LineSection;
208
  StringRef StringSection;
209
  const DWARFSection &StringOffsetSection;
210
  const DWARFSection *AddrOffsetSection;
211
  uint32_t AddrOffsetSectionBase = 0;
212
  bool isLittleEndian;
213
  bool IsDWO;
214
  const DWARFUnitVector &UnitVector;
215
216
  /// Start, length, and DWARF format of the unit's contribution to the string
217
  /// offsets table (DWARF v5).
218
  Optional<StrOffsetsContributionDescriptor> StringOffsetsTableContribution;
219
220
  /// A table of range lists (DWARF v5 and later).
221
  Optional<DWARFDebugRnglistTable> RngListTable;
222
223
  mutable const DWARFAbbreviationDeclarationSet *Abbrevs;
224
  llvm::Optional<object::SectionedAddress> BaseAddr;
225
  /// The compile unit debug information entry items.
226
  std::vector<DWARFDebugInfoEntry> DieArray;
227
228
  /// Map from range's start address to end address and corresponding DIE.
229
  /// IntervalMap does not support range removal, as a result, we use the
230
  /// std::map::upper_bound for address range lookup.
231
  std::map<uint64_t, std::pair<uint64_t, DWARFDie>> AddrDieMap;
232
233
  using die_iterator_range =
234
      iterator_range<std::vector<DWARFDebugInfoEntry>::iterator>;
235
236
  std::shared_ptr<DWARFUnit> DWO;
237
238
32.9k
  uint32_t getDIEIndex(const DWARFDebugInfoEntry *Die) {
239
32.9k
    auto First = DieArray.data();
240
32.9k
    assert(Die >= First && Die < First + DieArray.size());
241
32.9k
    return Die - First;
242
32.9k
  }
243
244
protected:
245
227
  const DWARFUnitHeader &getHeader() const { return Header; }
246
247
  /// Size in bytes of the parsed unit header.
248
4.32k
  uint32_t getHeaderSize() const { return Header.getSize(); }
249
250
  /// Find the unit's contribution to the string offsets table and determine its
251
  /// length and form. The given offset is expected to be derived from the unit
252
  /// DIE's DW_AT_str_offsets_base attribute.
253
  Expected<Optional<StrOffsetsContributionDescriptor>>
254
  determineStringOffsetsTableContribution(DWARFDataExtractor &DA);
255
256
  /// Find the unit's contribution to the string offsets table and determine its
257
  /// length and form. The given offset is expected to be 0 in a dwo file or,
258
  /// in a dwp file, the start of the unit's contribution to the string offsets
259
  /// table section (as determined by the index table).
260
  Expected<Optional<StrOffsetsContributionDescriptor>>
261
  determineStringOffsetsTableContributionDWO(DWARFDataExtractor &DA);
262
263
public:
264
  DWARFUnit(DWARFContext &Context, const DWARFSection &Section,
265
            const DWARFUnitHeader &Header, const DWARFDebugAbbrev *DA,
266
            const DWARFSection *RS, const DWARFSection *LocSection,
267
            StringRef SS, const DWARFSection &SOS, const DWARFSection *AOS,
268
            const DWARFSection &LS, bool LE, bool IsDWO,
269
            const DWARFUnitVector &UnitVector);
270
271
  virtual ~DWARFUnit();
272
273
216
  bool isDWOUnit() const { return IsDWO; }
274
75.3k
  DWARFContext& getContext() const { return Context; }
275
149
  const DWARFSection &getInfoSection() const { return InfoSection; }
276
386
  const DWARFSection *getLocSection() const { return LocSection; }
277
7
  StringRef getLocSectionData() const { return LocSectionData; }
278
19.1k
  uint32_t getOffset() const { return Header.getOffset(); }
279
135k
  const dwarf::FormParams &getFormParams() const {
280
135k
    return Header.getFormParams();
281
135k
  }
282
12.6k
  uint16_t getVersion() const { return Header.getVersion(); }
283
83.4k
  uint8_t getAddressByteSize() const { return Header.getAddressByteSize(); }
284
481
  uint8_t getRefAddrByteSize() const { return Header.getRefAddrByteSize(); }
285
5.44k
  uint8_t getDwarfOffsetByteSize() const {
286
5.44k
    return Header.getDwarfOffsetByteSize();
287
5.44k
  }
288
835
  uint32_t getLength() const { return Header.getLength(); }
289
289
  uint8_t getUnitType() const { return Header.getUnitType(); }
290
898
  bool isTypeUnit() const { return Header.isTypeUnit(); }
291
12.8k
  uint32_t getNextUnitOffset() const { return Header.getNextUnitOffset(); }
292
1.85k
  const DWARFSection &getLineSection() const { return LineSection; }
293
0
  StringRef getStringSection() const { return StringSection; }
294
0
  const DWARFSection &getStringOffsetSection() const {
295
0
    return StringOffsetSection;
296
0
  }
297
298
6
  void setAddrOffsetSection(const DWARFSection *AOS, uint32_t Base) {
299
6
    AddrOffsetSection = AOS;
300
6
    AddrOffsetSectionBase = Base;
301
6
  }
302
303
  /// Recursively update address to Die map.
304
  void updateAddressDieMap(DWARFDie Die);
305
306
149
  void setRangesSection(const DWARFSection *RS, uint32_t Base) {
307
149
    RangeSection = RS;
308
149
    RangeSectionBase = Base;
309
149
  }
310
311
  Optional<object::SectionedAddress>
312
  getAddrOffsetSectionItem(uint32_t Index) const;
313
  Optional<uint64_t> getStringOffsetSectionItem(uint32_t Index) const;
314
315
  DWARFDataExtractor getDebugInfoExtractor() const;
316
317
19.2k
  DataExtractor getStringExtractor() const {
318
19.2k
    return DataExtractor(StringSection, false, 0);
319
19.2k
  }
320
321
  /// Extract the range list referenced by this compile unit from the
322
  /// .debug_ranges section. If the extraction is unsuccessful, an error
323
  /// is returned. Successful extraction requires that the compile unit
324
  /// has already been extracted.
325
  Error extractRangeList(uint32_t RangeListOffset,
326
                         DWARFDebugRangeList &RangeList) const;
327
  void clear();
328
329
  const Optional<StrOffsetsContributionDescriptor> &
330
99
  getStringOffsetsTableContribution() const {
331
99
    return StringOffsetsTableContribution;
332
99
  }
333
334
1.63k
  uint8_t getDwarfStringOffsetsByteSize() const {
335
1.63k
    assert(StringOffsetsTableContribution);
336
1.63k
    return StringOffsetsTableContribution->getDwarfOffsetByteSize();
337
1.63k
  }
338
339
1.63k
  uint64_t getStringOffsetsBase() const {
340
1.63k
    assert(StringOffsetsTableContribution);
341
1.63k
    return StringOffsetsTableContribution->Base;
342
1.63k
  }
343
344
  const DWARFAbbreviationDeclarationSet *getAbbreviations() const;
345
346
107
  static bool isMatchingUnitTypeAndTag(uint8_t UnitType, dwarf::Tag Tag) {
347
107
    switch (UnitType) {
348
107
    case dwarf::DW_UT_compile:
349
105
      return Tag == dwarf::DW_TAG_compile_unit;
350
107
    case dwarf::DW_UT_type:
351
2
      return Tag == dwarf::DW_TAG_type_unit;
352
107
    case dwarf::DW_UT_partial:
353
0
      return Tag == dwarf::DW_TAG_partial_unit;
354
107
    case dwarf::DW_UT_skeleton:
355
0
      return Tag == dwarf::DW_TAG_skeleton_unit;
356
107
    case dwarf::DW_UT_split_compile:
357
0
    case dwarf::DW_UT_split_type:
358
0
      return dwarf::isUnitType(Tag);
359
0
    }
360
0
    return false;
361
0
  }
362
363
  /// Return the number of bytes for the header of a unit of
364
  /// UnitType type.
365
  ///
366
  /// This function must be called with a valid unit type which in
367
  /// DWARF5 is defined as one of the following six types.
368
0
  static uint32_t getDWARF5HeaderSize(uint8_t UnitType) {
369
0
    switch (UnitType) {
370
0
    case dwarf::DW_UT_compile:
371
0
    case dwarf::DW_UT_partial:
372
0
      return 12;
373
0
    case dwarf::DW_UT_skeleton:
374
0
    case dwarf::DW_UT_split_compile:
375
0
      return 20;
376
0
    case dwarf::DW_UT_type:
377
0
    case dwarf::DW_UT_split_type:
378
0
      return 24;
379
0
    }
380
0
    llvm_unreachable("Invalid UnitType.");
381
0
  }
382
383
  llvm::Optional<object::SectionedAddress> getBaseAddress();
384
385
15.9k
  DWARFDie getUnitDIE(bool ExtractUnitDIEOnly = true) {
386
15.9k
    extractDIEsIfNeeded(ExtractUnitDIEOnly);
387
15.9k
    if (DieArray.empty())
388
6
      return DWARFDie();
389
15.9k
    return DWARFDie(this, &DieArray[0]);
390
15.9k
  }
391
392
  DWARFDie getNonSkeletonUnitDIE(bool ExtractUnitDIEOnly = true) {
393
    parseDWO();
394
    if (DWO)
395
      return DWO->getUnitDIE(ExtractUnitDIEOnly);
396
    return getUnitDIE(ExtractUnitDIEOnly);
397
  }
398
399
  const char *getCompilationDir();
400
49
  Optional<uint64_t> getDWOId() {
401
49
    extractDIEsIfNeeded(/*CUDieOnly*/ true);
402
49
    return getHeader().getDWOId();
403
49
  }
404
0
  void setDWOId(uint64_t NewID) { Header.setDWOId(NewID); }
405
406
  /// Return a vector of address ranges resulting from a (possibly encoded)
407
  /// range list starting at a given offset in the appropriate ranges section.
408
  Expected<DWARFAddressRangesVector> findRnglistFromOffset(uint32_t Offset);
409
410
  /// Return a vector of address ranges retrieved from an encoded range
411
  /// list whose offset is found via a table lookup given an index (DWARF v5
412
  /// and later).
413
  Expected<DWARFAddressRangesVector> findRnglistFromIndex(uint32_t Index);
414
415
  /// Return a rangelist's offset based on an index. The index designates
416
  /// an entry in the rangelist table's offset array and is supplied by
417
  /// DW_FORM_rnglistx.
418
24
  Optional<uint32_t> getRnglistOffset(uint32_t Index) {
419
24
    if (RngListTable)
420
21
      return RngListTable->getOffsetEntry(Index);
421
3
    return None;
422
3
  }
423
424
  Expected<DWARFAddressRangesVector> collectAddressRanges();
425
426
  /// Returns subprogram DIE with address range encompassing the provided
427
  /// address. The pointer is alive as long as parsed compile unit DIEs are not
428
  /// cleared.
429
  DWARFDie getSubroutineForAddress(uint64_t Address);
430
431
  /// getInlinedChainForAddress - fetches inlined chain for a given address.
432
  /// Returns empty chain if there is no subprogram containing address. The
433
  /// chain is valid as long as parsed compile unit DIEs are not cleared.
434
  void getInlinedChainForAddress(uint64_t Address,
435
                                 SmallVectorImpl<DWARFDie> &InlinedChain);
436
437
  /// Return the DWARFUnitVector containing this unit.
438
316
  const DWARFUnitVector &getUnitVector() const { return UnitVector; }
439
440
  /// Returns the number of DIEs in the unit. Parses the unit
441
  /// if necessary.
442
2.13k
  unsigned getNumDIEs() {
443
2.13k
    extractDIEsIfNeeded(false);
444
2.13k
    return DieArray.size();
445
2.13k
  }
446
447
  /// Return the index of a DIE inside the unit's DIE vector.
448
  ///
449
  /// It is illegal to call this method with a DIE that hasn't be
450
  /// created by this unit. In other word, it's illegal to call this
451
  /// method on a DIE that isn't accessible by following
452
  /// children/sibling links starting from this unit's getUnitDIE().
453
  uint32_t getDIEIndex(const DWARFDie &D) {
454
    return getDIEIndex(D.getDebugInfoEntry());
455
  }
456
457
  /// Return the DIE object at the given index.
458
3.22k
  DWARFDie getDIEAtIndex(unsigned Index) {
459
3.22k
    assert(Index < DieArray.size());
460
3.22k
    return DWARFDie(this, &DieArray[Index]);
461
3.22k
  }
462
463
  DWARFDie getParent(const DWARFDebugInfoEntry *Die);
464
  DWARFDie getSibling(const DWARFDebugInfoEntry *Die);
465
  DWARFDie getPreviousSibling(const DWARFDebugInfoEntry *Die);
466
  DWARFDie getFirstChild(const DWARFDebugInfoEntry *Die);
467
  DWARFDie getLastChild(const DWARFDebugInfoEntry *Die);
468
469
  /// Return the DIE object for a given offset inside the
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  /// unit's DIE vector.
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  ///
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  /// The unit needs to have its DIEs extracted for this method to work.
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8.43k
  DWARFDie getDIEForOffset(uint32_t Offset) {
474
8.43k
    extractDIEsIfNeeded(false);
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8.43k
    assert(!DieArray.empty());
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8.43k
    auto It =
477
36.3k
        llvm::partition_point(DieArray, [=](const DWARFDebugInfoEntry &DIE) {
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36.3k
          return DIE.getOffset() < Offset;
479
36.3k
        });
480
8.43k
    if (It != DieArray.end() && 
It->getOffset() == Offset8.43k
)
481
8.42k
      return DWARFDie(this, &*It);
482
13
    return DWARFDie();
483
13
  }
484
485
3.89k
  uint32_t getLineTableOffset() const {
486
3.89k
    if (auto IndexEntry = Header.getIndexEntry())
487
12
      if (const auto *Contrib = IndexEntry->getOffset(DW_SECT_LINE))
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12
        return Contrib->Offset;
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3.88k
    return 0;
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3.88k
  }
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347
  die_iterator_range dies() {
493
347
    extractDIEsIfNeeded(false);
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347
    return die_iterator_range(DieArray.begin(), DieArray.end());
495
347
  }
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  virtual void dump(raw_ostream &OS, DIDumpOptions DumpOpts) = 0;
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private:
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  /// Size in bytes of the .debug_info data associated with this compile unit.
500
1.90k
  size_t getDebugInfoSize() const {
501
1.90k
    return Header.getLength() + 4 - getHeaderSize();
502
1.90k
  }
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  /// extractDIEsIfNeeded - Parses a compile unit and indexes its DIEs if it
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  /// hasn't already been done. Returns the number of DIEs parsed at this call.
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  size_t extractDIEsIfNeeded(bool CUDieOnly);
507
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  /// extractDIEsToVector - Appends all parsed DIEs to a vector.
509
  void extractDIEsToVector(bool AppendCUDie, bool AppendNonCUDIEs,
510
                           std::vector<DWARFDebugInfoEntry> &DIEs) const;
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  /// clearDIEs - Clear parsed DIEs to keep memory usage low.
513
  void clearDIEs(bool KeepCUDie);
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  /// parseDWO - Parses .dwo file for current compile unit. Returns true if
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  /// it was actually constructed.
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  bool parseDWO();
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};
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_DWARF_DWARFUNIT_H