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DWARFLinkerCompileUnit.h
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1 //===- DWARFLinkerCompileUnit.h ---------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_DWARFLINKER_DWARFLINKERCOMPILEUNIT_H
10 #define LLVM_DWARFLINKER_DWARFLINKERCOMPILEUNIT_H
11 
12 #include "llvm/ADT/AddressRanges.h"
13 #include "llvm/ADT/DenseMap.h"
14 #include "llvm/CodeGen/DIE.h"
16 
17 namespace llvm {
18 
19 class DeclContext;
20 
21 /// Mapped value in the address map is the offset to apply to the
22 /// linked address.
24 
25 // FIXME: Delete this structure.
26 struct PatchLocation {
28 
29  PatchLocation() = default;
31 
32  void set(uint64_t New) const {
33  assert(I);
34  const auto &Old = *I;
35  assert(Old.getType() == DIEValue::isInteger);
36  *I = DIEValue(Old.getAttribute(), Old.getForm(), DIEInteger(New));
37  }
38 
39  uint64_t get() const {
40  assert(I);
41  return I->getDIEInteger().getValue();
42  }
43 };
44 
45 /// Stores all information relating to a compile unit, be it in its original
46 /// instance in the object file to its brand new cloned and generated DIE tree.
47 class CompileUnit {
48 public:
49  /// Information gathered about a DIE in the object file.
50  struct DIEInfo {
51  /// Address offset to apply to the described entity.
52  int64_t AddrAdjust;
53 
54  /// ODR Declaration context.
56 
57  /// Cloned version of that DIE.
59 
60  /// The index of this DIE's parent.
62 
63  /// Is the DIE part of the linked output?
64  bool Keep : 1;
65 
66  /// Was this DIE's entity found in the map?
67  bool InDebugMap : 1;
68 
69  /// Is this a pure forward declaration we can strip?
70  bool Prune : 1;
71 
72  /// Does DIE transitively refer an incomplete decl?
73  bool Incomplete : 1;
74 
75  /// Is DIE in the clang module scope?
76  bool InModuleScope : 1;
77 
78  /// Is ODR marking done?
79  bool ODRMarkingDone : 1;
80  };
81 
82  CompileUnit(DWARFUnit &OrigUnit, unsigned ID, bool CanUseODR,
83  StringRef ClangModuleName)
84  : OrigUnit(OrigUnit), ID(ID), ClangModuleName(ClangModuleName) {
85  Info.resize(OrigUnit.getNumDIEs());
86 
87  auto CUDie = OrigUnit.getUnitDIE(false);
88  if (!CUDie) {
89  HasODR = false;
90  return;
91  }
92  if (auto Lang = dwarf::toUnsigned(CUDie.find(dwarf::DW_AT_language)))
93  HasODR = CanUseODR && (*Lang == dwarf::DW_LANG_C_plus_plus ||
94  *Lang == dwarf::DW_LANG_C_plus_plus_03 ||
95  *Lang == dwarf::DW_LANG_C_plus_plus_11 ||
96  *Lang == dwarf::DW_LANG_C_plus_plus_14 ||
97  *Lang == dwarf::DW_LANG_ObjC_plus_plus);
98  else
99  HasODR = false;
100  }
101 
102  DWARFUnit &getOrigUnit() const { return OrigUnit; }
103 
104  unsigned getUniqueID() const { return ID; }
105 
106  void createOutputDIE() { NewUnit.emplace(OrigUnit.getUnitDIE().getTag()); }
107 
109  if (NewUnit)
110  return &const_cast<BasicDIEUnit &>(*NewUnit).getUnitDie();
111  return nullptr;
112  }
113 
114  bool hasODR() const { return HasODR; }
115  bool isClangModule() const { return !ClangModuleName.empty(); }
117  /// Return the DW_AT_LLVM_sysroot of the compile unit or an empty StringRef.
119 
120  const std::string &getClangModuleName() const { return ClangModuleName; }
121 
122  DIEInfo &getInfo(unsigned Idx) { return Info[Idx]; }
123  const DIEInfo &getInfo(unsigned Idx) const { return Info[Idx]; }
124 
125  DIEInfo &getInfo(const DWARFDie &Die) {
126  unsigned Idx = getOrigUnit().getDIEIndex(Die);
127  return Info[Idx];
128  }
129 
130  uint64_t getStartOffset() const { return StartOffset; }
131  uint64_t getNextUnitOffset() const { return NextUnitOffset; }
133 
134  uint64_t getLowPc() const { return LowPc; }
135  uint64_t getHighPc() const { return HighPc; }
136  bool hasLabelAt(uint64_t Addr) const { return Labels.count(Addr); }
137 
139  return UnitRangeAttribute;
140  }
141 
142  const RangesTy &getFunctionRanges() const { return Ranges; }
143 
144  const std::vector<PatchLocation> &getRangesAttributes() const {
145  return RangeAttributes;
146  }
147 
148  const std::vector<std::pair<PatchLocation, int64_t>> &
150  return LocationAttributes;
151  }
152 
153  /// Mark every DIE in this unit as kept. This function also
154  /// marks variables as InDebugMap so that they appear in the
155  /// reconstructed accelerator tables.
156  void markEverythingAsKept();
157 
158  /// Compute the end offset for this unit. Must be called after the CU's DIEs
159  /// have been cloned. \returns the next unit offset (which is also the
160  /// current debug_info section size).
162 
163  /// Keep track of a forward reference to DIE \p Die in \p RefUnit by \p
164  /// Attr. The attribute should be fixed up later to point to the absolute
165  /// offset of \p Die in the debug_info section or to the canonical offset of
166  /// \p Ctxt if it is non-null.
167  void noteForwardReference(DIE *Die, const CompileUnit *RefUnit,
168  DeclContext *Ctxt, PatchLocation Attr);
169 
170  /// Apply all fixups recorded by noteForwardReference().
171  void fixupForwardReferences();
172 
173  /// Add the low_pc of a label that is relocated by applying
174  /// offset \p PCOffset.
175  void addLabelLowPc(uint64_t LabelLowPc, int64_t PcOffset);
176 
177  /// Add a function range [\p LowPC, \p HighPC) that is relocated by applying
178  /// offset \p PCOffset.
179  void addFunctionRange(uint64_t LowPC, uint64_t HighPC, int64_t PCOffset);
180 
181  /// Keep track of a DW_AT_range attribute that we will need to patch up later.
182  void noteRangeAttribute(const DIE &Die, PatchLocation Attr);
183 
184  /// Keep track of a location attribute pointing to a location list in the
185  /// debug_loc section.
186  void noteLocationAttribute(PatchLocation Attr, int64_t PcOffset);
187 
188  /// Add a name accelerator entry for \a Die with \a Name.
189  void addNamespaceAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name);
190 
191  /// Add a name accelerator entry for \a Die with \a Name.
192  void addNameAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name,
193  bool SkipPubnamesSection = false);
194 
195  /// Add various accelerator entries for \p Die with \p Name which is stored
196  /// in the string table at \p Offset. \p Name must be an Objective-C
197  /// selector.
198  void addObjCAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name,
199  bool SkipPubnamesSection = false);
200 
201  /// Add a type accelerator entry for \p Die with \p Name which is stored in
202  /// the string table at \p Offset.
203  void addTypeAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name,
204  bool ObjcClassImplementation,
205  uint32_t QualifiedNameHash);
206 
207  struct AccelInfo {
208  /// Name of the entry.
210 
211  /// DIE this entry describes.
212  const DIE *Die;
213 
214  /// Hash of the fully qualified name.
216 
217  /// Emit this entry only in the apple_* sections.
219 
220  /// Is this an ObjC class implementation?
222 
224  bool SkipPubSection = false)
226 
228  uint32_t QualifiedNameHash, bool ObjCClassIsImplementation)
231  ObjcClassImplementation(ObjCClassIsImplementation) {}
232  };
233 
234  const std::vector<AccelInfo> &getPubnames() const { return Pubnames; }
235  const std::vector<AccelInfo> &getPubtypes() const { return Pubtypes; }
236  const std::vector<AccelInfo> &getNamespaces() const { return Namespaces; }
237  const std::vector<AccelInfo> &getObjC() const { return ObjC; }
238 
239  MCSymbol *getLabelBegin() { return LabelBegin; }
240  void setLabelBegin(MCSymbol *S) { LabelBegin = S; }
241 
242 private:
243  DWARFUnit &OrigUnit;
244  unsigned ID;
245  std::vector<DIEInfo> Info; ///< DIE info indexed by DIE index.
246  Optional<BasicDIEUnit> NewUnit;
247  MCSymbol *LabelBegin = nullptr;
248 
249  uint64_t StartOffset;
250  uint64_t NextUnitOffset;
251 
253  uint64_t HighPc = 0;
254 
255  /// A list of attributes to fixup with the absolute offset of
256  /// a DIE in the debug_info section.
257  ///
258  /// The offsets for the attributes in this array couldn't be set while
259  /// cloning because for cross-cu forward references the target DIE's offset
260  /// isn't known you emit the reference attribute.
261  std::vector<
262  std::tuple<DIE *, const CompileUnit *, DeclContext *, PatchLocation>>
263  ForwardDIEReferences;
264 
265  /// The ranges in that map are the PC ranges for functions in this unit,
266  /// associated with the PC offset to apply to the addresses to get
267  /// the linked address.
268  RangesTy Ranges;
269 
270  /// The DW_AT_low_pc of each DW_TAG_label.
272 
273  /// DW_AT_ranges attributes to patch after we have gathered
274  /// all the unit's function addresses.
275  /// @{
276  std::vector<PatchLocation> RangeAttributes;
277  Optional<PatchLocation> UnitRangeAttribute;
278  /// @}
279 
280  /// Location attributes that need to be transferred from the
281  /// original debug_loc section to the liked one. They are stored
282  /// along with the PC offset that is to be applied to their
283  /// function's address.
284  std::vector<std::pair<PatchLocation, int64_t>> LocationAttributes;
285 
286  /// Accelerator entries for the unit, both for the pub*
287  /// sections and the apple* ones.
288  /// @{
289  std::vector<AccelInfo> Pubnames;
290  std::vector<AccelInfo> Pubtypes;
291  std::vector<AccelInfo> Namespaces;
292  std::vector<AccelInfo> ObjC;
293  /// @}
294 
295  /// Is this unit subject to the ODR rule?
296  bool HasODR;
297 
298  /// The DW_AT_language of this unit.
299  uint16_t Language = 0;
300 
301  /// The DW_AT_LLVM_sysroot of this unit.
302  std::string SysRoot;
303 
304  /// If this is a Clang module, this holds the module's name.
305  std::string ClangModuleName;
306 };
307 
308 } // end namespace llvm
309 
310 #endif // LLVM_DWARFLINKER_DWARFLINKERCOMPILEUNIT_H
llvm::CompileUnit::DIEInfo::AddrAdjust
int64_t AddrAdjust
Address offset to apply to the described entity.
Definition: DWARFLinkerCompileUnit.h:52
llvm::CompileUnit::getUnitRangesAttribute
Optional< PatchLocation > getUnitRangesAttribute() const
Definition: DWARFLinkerCompileUnit.h:138
llvm::CompileUnit::hasLabelAt
bool hasLabelAt(uint64_t Addr) const
Definition: DWARFLinkerCompileUnit.h:136
llvm::CompileUnit::getOrigUnit
DWARFUnit & getOrigUnit() const
Definition: DWARFLinkerCompileUnit.h:102
llvm::CompileUnit::DIEInfo::Ctxt
DeclContext * Ctxt
ODR Declaration context.
Definition: DWARFLinkerCompileUnit.h:55
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
llvm::MCSymbol
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
llvm::CompileUnit::getInfo
DIEInfo & getInfo(unsigned Idx)
Definition: DWARFLinkerCompileUnit.h:122
llvm::DeclContext
A DeclContext is a named program scope that is used for ODR uniquing of types.
Definition: DWARFLinkerDeclContext.h:78
llvm::PatchLocation::get
uint64_t get() const
Definition: DWARFLinkerCompileUnit.h:39
llvm::DIEValue
Definition: DIE.h:369
llvm::CompileUnit::DIEInfo::ParentIdx
uint32_t ParentIdx
The index of this DIE's parent.
Definition: DWARFLinkerCompileUnit.h:61
llvm::CompileUnit::getRangesAttributes
const std::vector< PatchLocation > & getRangesAttributes() const
Definition: DWARFLinkerCompileUnit.h:144
llvm::CompileUnit::addTypeAccelerator
void addTypeAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name, bool ObjcClassImplementation, uint32_t QualifiedNameHash)
Add a type accelerator entry for Die with Name which is stored in the string table at Offset.
Definition: DWARFLinkerCompileUnit.cpp:141
llvm::SmallDenseMap< uint64_t, uint64_t, 1 >
llvm::PatchLocation::PatchLocation
PatchLocation(DIE::value_iterator I)
Definition: DWARFLinkerCompileUnit.h:30
llvm::CompileUnit::DIEInfo::Prune
bool Prune
Is this a pure forward declaration we can strip?
Definition: DWARFLinkerCompileUnit.h:70
llvm::BasicDIEUnit
Definition: DIE.h:923
llvm::CompileUnit::getClangModuleName
const std::string & getClangModuleName() const
Definition: DWARFLinkerCompileUnit.h:120
DenseMap.h
llvm::CompileUnit::getLanguage
uint16_t getLanguage()
Definition: DWARFLinkerCompileUnit.cpp:24
llvm::CompileUnit::getPubtypes
const std::vector< AccelInfo > & getPubtypes() const
Definition: DWARFLinkerCompileUnit.h:235
llvm::CompileUnit::getLabelBegin
MCSymbol * getLabelBegin()
Definition: DWARFLinkerCompileUnit.h:239
llvm::CompileUnit::CompileUnit
CompileUnit(DWARFUnit &OrigUnit, unsigned ID, bool CanUseODR, StringRef ClangModuleName)
Definition: DWARFLinkerCompileUnit.h:82
llvm::Optional
Definition: APInt.h:33
llvm::DenseMapBase::count
size_type count(const_arg_type_t< KeyT > Val) const
Return 1 if the specified key is in the map, 0 otherwise.
Definition: DenseMap.h:145
llvm::CompileUnit::noteRangeAttribute
void noteRangeAttribute(const DIE &Die, PatchLocation Attr)
Keep track of a DW_AT_range attribute that we will need to patch up later.
Definition: DWARFLinkerCompileUnit.cpp:113
llvm::CompileUnit::getHighPc
uint64_t getHighPc() const
Definition: DWARFLinkerCompileUnit.h:135
llvm::DIE
A structured debug information entry.
Definition: DIE.h:739
llvm::max
Expected< ExpressionValue > max(const ExpressionValue &Lhs, const ExpressionValue &Rhs)
Definition: FileCheck.cpp:337
llvm::CompileUnit::DIEInfo::InDebugMap
bool InDebugMap
Was this DIE's entity found in the map?
Definition: DWARFLinkerCompileUnit.h:67
llvm::CompileUnit::AccelInfo::SkipPubSection
bool SkipPubSection
Emit this entry only in the apple_* sections.
Definition: DWARFLinkerCompileUnit.h:218
llvm::CompileUnit::getLocationAttributes
const std::vector< std::pair< PatchLocation, int64_t > > & getLocationAttributes() const
Definition: DWARFLinkerCompileUnit.h:149
llvm::DwarfStringPoolEntryRef
DwarfStringPoolEntryRef: Dwarf string pool entry reference.
Definition: DwarfStringPoolEntry.h:44
llvm::CompileUnit::addObjCAccelerator
void addObjCAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name, bool SkipPubnamesSection=false)
Add various accelerator entries for Die with Name which is stored in the string table at Offset.
Definition: DWARFLinkerCompileUnit.cpp:129
llvm::yaml::isInteger
static bool isInteger(StringRef Val)
Definition: ELFYAML.cpp:1519
llvm::CompileUnit::AccelInfo::AccelInfo
AccelInfo(DwarfStringPoolEntryRef Name, const DIE *Die, uint32_t QualifiedNameHash, bool ObjCClassIsImplementation)
Definition: DWARFLinkerCompileUnit.h:227
llvm::DWARFUnit::getUnitDIE
DWARFDie getUnitDIE(bool ExtractUnitDIEOnly=true)
Definition: DWARFUnit.h:426
llvm::CompileUnit::DIEInfo::Clone
DIE * Clone
Cloned version of that DIE.
Definition: DWARFLinkerCompileUnit.h:58
llvm::DWARFUnit::getNumDIEs
unsigned getNumDIEs()
Returns the number of DIEs in the unit.
Definition: DWARFUnit.h:488
llvm::CompileUnit::DIEInfo
Information gathered about a DIE in the object file.
Definition: DWARFLinkerCompileUnit.h:50
AddressRanges.h
llvm::CompileUnit::getInfo
DIEInfo & getInfo(const DWARFDie &Die)
Definition: DWARFLinkerCompileUnit.h:125
llvm::CompileUnit::getNamespaces
const std::vector< AccelInfo > & getNamespaces() const
Definition: DWARFLinkerCompileUnit.h:236
llvm::DIEValueList::value_iterator
Definition: DIE.h:675
llvm::DebugInfoSize
Hold the input and output of the debug info size in bytes.
Definition: DWARFLinker.cpp:39
false
Definition: StackSlotColoring.cpp:141
llvm::CompileUnit::getUniqueID
unsigned getUniqueID() const
Definition: DWARFLinkerCompileUnit.h:104
llvm::DIEInteger
An integer value DIE.
Definition: DIE.h:163
llvm::PatchLocation::I
DIE::value_iterator I
Definition: DWARFLinkerCompileUnit.h:27
llvm::CompileUnit::getPubnames
const std::vector< AccelInfo > & getPubnames() const
Definition: DWARFLinkerCompileUnit.h:234
llvm::CallingConv::ID
unsigned ID
LLVM IR allows to use arbitrary numbers as calling convention identifiers.
Definition: CallingConv.h:24
llvm::CompileUnit::getInfo
const DIEInfo & getInfo(unsigned Idx) const
Definition: DWARFLinkerCompileUnit.h:123
DIE.h
llvm::CompileUnit::AccelInfo
Definition: DWARFLinkerCompileUnit.h:207
uint64_t
llvm::CompileUnit::getObjC
const std::vector< AccelInfo > & getObjC() const
Definition: DWARFLinkerCompileUnit.h:237
llvm::CompileUnit::AccelInfo::AccelInfo
AccelInfo(DwarfStringPoolEntryRef Name, const DIE *Die, bool SkipPubSection=false)
Definition: DWARFLinkerCompileUnit.h:223
llvm::CompileUnit::addLabelLowPc
void addLabelLowPc(uint64_t LabelLowPc, int64_t PcOffset)
Add the low_pc of a label that is relocated by applying offset PCOffset.
Definition: DWARFLinkerCompileUnit.cpp:102
llvm::CompileUnit::DIEInfo::Keep
bool Keep
Is the DIE part of the linked output?
Definition: DWARFLinkerCompileUnit.h:64
Addr
uint64_t Addr
Definition: ELFObjHandler.cpp:79
llvm::CompileUnit
Stores all information relating to a compile unit, be it in its original instance in the object file ...
Definition: DWARFLinkerCompileUnit.h:47
DWARFUnit.h
llvm::AddressRangesMap< int64_t >
llvm::CompileUnit::getStartOffset
uint64_t getStartOffset() const
Definition: DWARFLinkerCompileUnit.h:130
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
llvm::CompileUnit::getLowPc
uint64_t getLowPc() const
Definition: DWARFLinkerCompileUnit.h:134
llvm::CompileUnit::getNextUnitOffset
uint64_t getNextUnitOffset() const
Definition: DWARFLinkerCompileUnit.h:131
llvm::CompileUnit::getFunctionRanges
const RangesTy & getFunctionRanges() const
Definition: DWARFLinkerCompileUnit.h:142
llvm::CompileUnit::setStartOffset
void setStartOffset(uint64_t DebugInfoSize)
Definition: DWARFLinkerCompileUnit.h:132
llvm::CompileUnit::setLabelBegin
void setLabelBegin(MCSymbol *S)
Definition: DWARFLinkerCompileUnit.h:240
llvm::CompileUnit::addFunctionRange
void addFunctionRange(uint64_t LowPC, uint64_t HighPC, int64_t PCOffset)
Add a function range [LowPC, HighPC) that is relocated by applying offset PCOffset.
Definition: DWARFLinkerCompileUnit.cpp:106
llvm::CompileUnit::DIEInfo::ODRMarkingDone
bool ODRMarkingDone
Is ODR marking done?
Definition: DWARFLinkerCompileUnit.h:79
llvm::CompileUnit::AccelInfo::Name
DwarfStringPoolEntryRef Name
Name of the entry.
Definition: DWARFLinkerCompileUnit.h:209
llvm::CompileUnit::AccelInfo::QualifiedNameHash
uint32_t QualifiedNameHash
Hash of the fully qualified name.
Definition: DWARFLinkerCompileUnit.h:215
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
llvm::CompileUnit::addNameAccelerator
void addNameAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name, bool SkipPubnamesSection=false)
Add a name accelerator entry for Die with Name.
Definition: DWARFLinkerCompileUnit.cpp:135
llvm::CompileUnit::noteLocationAttribute
void noteLocationAttribute(PatchLocation Attr, int64_t PcOffset)
Keep track of a location attribute pointing to a location list in the debug_loc section.
Definition: DWARFLinkerCompileUnit.cpp:120
uint32_t
S
add sub stmia L5 ldr r0 bl L_printf $stub Instead of a and a wouldn t it be better to do three moves *Return an aggregate type is even return S
Definition: README.txt:210
llvm::CompileUnit::addNamespaceAccelerator
void addNamespaceAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name)
Add a name accelerator entry for Die with Name.
Definition: DWARFLinkerCompileUnit.cpp:124
llvm::CompileUnit::computeNextUnitOffset
uint64_t computeNextUnitOffset(uint16_t DwarfVersion)
Compute the end offset for this unit.
Definition: DWARFLinkerCompileUnit.cpp:70
llvm::CompileUnit::getSysRoot
StringRef getSysRoot()
Return the DW_AT_LLVM_sysroot of the compile unit or an empty StringRef.
Definition: DWARFLinkerCompileUnit.cpp:32
uint16_t
llvm::CompileUnit::fixupForwardReferences
void fixupForwardReferences()
Apply all fixups recorded by noteForwardReference().
Definition: DWARFLinkerCompileUnit.cpp:86
llvm::DWARFUnit
Definition: DWARFUnit.h:207
llvm::PatchLocation
Definition: DWARFLinkerCompileUnit.h:26
llvm::PatchLocation::set
void set(uint64_t New) const
Definition: DWARFLinkerCompileUnit.h:32
llvm::CompileUnit::hasODR
bool hasODR() const
Definition: DWARFLinkerCompileUnit.h:114
llvm::CompileUnit::getOutputUnitDIE
DIE * getOutputUnitDIE() const
Definition: DWARFLinkerCompileUnit.h:108
llvm::dwarf::toUnsigned
Optional< uint64_t > toUnsigned(const Optional< DWARFFormValue > &V)
Take an optional DWARFFormValue and try to extract an unsigned constant.
Definition: DWARFFormValue.h:225
llvm::CompileUnit::createOutputDIE
void createOutputDIE()
Definition: DWARFLinkerCompileUnit.h:106
llvm::CompileUnit::AccelInfo::ObjcClassImplementation
bool ObjcClassImplementation
Is this an ObjC class implementation?
Definition: DWARFLinkerCompileUnit.h:221
llvm::DWARFDie::getTag
dwarf::Tag getTag() const
Definition: DWARFDie.h:72
llvm::PatchLocation::PatchLocation
PatchLocation()=default
llvm::CompileUnit::AccelInfo::Die
const DIE * Die
DIE this entry describes.
Definition: DWARFLinkerCompileUnit.h:212
llvm::DWARFUnit::getDIEIndex
uint32_t getDIEIndex(const DWARFDebugInfoEntry *Die) const
Return the index of a Die entry inside the unit's DIE vector.
Definition: DWARFUnit.h:262
llvm::CompileUnit::noteForwardReference
void noteForwardReference(DIE *Die, const CompileUnit *RefUnit, DeclContext *Ctxt, PatchLocation Attr)
Keep track of a forward reference to DIE Die in RefUnit by Attr.
Definition: DWARFLinkerCompileUnit.cpp:81
llvm::CompileUnit::DIEInfo::InModuleScope
bool InModuleScope
Is DIE in the clang module scope?
Definition: DWARFLinkerCompileUnit.h:76
llvm::DWARFDie
Utility class that carries the DWARF compile/type unit and the debug info entry in an object.
Definition: DWARFDie.h:43
llvm::CompileUnit::DIEInfo::Incomplete
bool Incomplete
Does DIE transitively refer an incomplete decl?
Definition: DWARFLinkerCompileUnit.h:73
llvm::CompileUnit::markEverythingAsKept
void markEverythingAsKept()
Mark every DIE in this unit as kept.
Definition: DWARFLinkerCompileUnit.cpp:40
llvm::DIEUnit::getUnitDie
DIE & getUnitDie()
Definition: DIE.h:919
llvm::CompileUnit::isClangModule
bool isClangModule() const
Definition: DWARFLinkerCompileUnit.h:115