1 //===--- CGDebugInfo.h - DebugInfo for LLVM CodeGen -------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is the source-level debug info generator for llvm translation.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
15 #define LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
17 #include "CGBuilder.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/ExternalASTSource.h"
21 #include "clang/AST/Type.h"
22 #include "clang/Basic/SourceLocation.h"
23 #include "clang/Frontend/CodeGenOptions.h"
24 #include "llvm/ADT/DenseMap.h"
25 #include "llvm/ADT/DenseSet.h"
26 #include "llvm/ADT/Optional.h"
27 #include "llvm/IR/DIBuilder.h"
28 #include "llvm/IR/DebugInfo.h"
29 #include "llvm/IR/ValueHandle.h"
30 #include "llvm/Support/Allocator.h"
37 class ClassTemplateSpecializationDecl;
40 class ObjCInterfaceDecl;
47 class CodeGenFunction;
50 /// This class gathers all debug information during compilation and is
51 /// responsible for emitting to llvm globals or pass directly to the
54 friend class ApplyDebugLocation;
55 friend class SaveAndRestoreLocation;
57 const codegenoptions::DebugInfoKind DebugKind;
58 bool DebugTypeExtRefs;
59 llvm::DIBuilder DBuilder;
60 llvm::DICompileUnit *TheCU = nullptr;
61 ModuleMap *ClangModuleMap = nullptr;
62 ExternalASTSource::ASTSourceDescriptor PCHDescriptor;
63 SourceLocation CurLoc;
64 llvm::MDNode *CurInlinedAt = nullptr;
65 llvm::DIType *VTablePtrType = nullptr;
66 llvm::DIType *ClassTy = nullptr;
67 llvm::DICompositeType *ObjTy = nullptr;
68 llvm::DIType *SelTy = nullptr;
69 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
70 llvm::DIType *SingletonId = nullptr;
71 #include "clang/Basic/OpenCLImageTypes.def"
72 llvm::DIType *OCLSamplerDITy = nullptr;
73 llvm::DIType *OCLEventDITy = nullptr;
74 llvm::DIType *OCLClkEventDITy = nullptr;
75 llvm::DIType *OCLQueueDITy = nullptr;
76 llvm::DIType *OCLNDRangeDITy = nullptr;
77 llvm::DIType *OCLReserveIDDITy = nullptr;
79 /// Cache of previously constructed Types.
80 llvm::DenseMap<const void *, llvm::TrackingMDRef> TypeCache;
82 llvm::SmallDenseMap<llvm::StringRef, llvm::StringRef> DebugPrefixMap;
84 struct ObjCInterfaceCacheEntry {
85 const ObjCInterfaceType *Type;
88 ObjCInterfaceCacheEntry(const ObjCInterfaceType *Type, llvm::DIType *Decl,
90 : Type(Type), Decl(Decl), Unit(Unit) {}
93 /// Cache of previously constructed interfaces which may change.
94 llvm::SmallVector<ObjCInterfaceCacheEntry, 32> ObjCInterfaceCache;
96 /// Cache of references to clang modules and precompiled headers.
97 llvm::DenseMap<const Module *, llvm::TrackingMDRef> ModuleCache;
99 /// List of interfaces we want to keep even if orphaned.
100 std::vector<void *> RetainedTypes;
102 /// Cache of forward declared types to RAUW at the end of compilation.
103 std::vector<std::pair<const TagType *, llvm::TrackingMDRef>> ReplaceMap;
105 /// Cache of replaceable forward declarations (functions and
106 /// variables) to RAUW at the end of compilation.
107 std::vector<std::pair<const DeclaratorDecl *, llvm::TrackingMDRef>>
110 /// Keep track of our current nested lexical block.
111 std::vector<llvm::TypedTrackingMDRef<llvm::DIScope>> LexicalBlockStack;
112 llvm::DenseMap<const Decl *, llvm::TrackingMDRef> RegionMap;
113 /// Keep track of LexicalBlockStack counter at the beginning of a
114 /// function. This is used to pop unbalanced regions at the end of a
116 std::vector<unsigned> FnBeginRegionCount;
118 /// This is a storage for names that are constructed on demand. For
119 /// example, C++ destructors, C++ operators etc..
120 llvm::BumpPtrAllocator DebugInfoNames;
123 llvm::DenseMap<const char *, llvm::TrackingMDRef> DIFileCache;
124 llvm::DenseMap<const FunctionDecl *, llvm::TrackingMDRef> SPCache;
125 /// Cache declarations relevant to DW_TAG_imported_declarations (C++
126 /// using declarations) that aren't covered by other more specific caches.
127 llvm::DenseMap<const Decl *, llvm::TrackingMDRef> DeclCache;
128 llvm::DenseMap<const NamespaceDecl *, llvm::TrackingMDRef> NamespaceCache;
129 llvm::DenseMap<const NamespaceAliasDecl *, llvm::TrackingMDRef>
131 llvm::DenseMap<const Decl *, llvm::TypedTrackingMDRef<llvm::DIDerivedType>>
132 StaticDataMemberCache;
134 /// Helper functions for getOrCreateType.
136 /// Currently the checksum of an interface includes the number of
137 /// ivars and property accessors.
138 llvm::DIType *CreateType(const BuiltinType *Ty);
139 llvm::DIType *CreateType(const ComplexType *Ty);
140 llvm::DIType *CreateQualifiedType(QualType Ty, llvm::DIFile *Fg);
141 llvm::DIType *CreateType(const TypedefType *Ty, llvm::DIFile *Fg);
142 llvm::DIType *CreateType(const TemplateSpecializationType *Ty,
144 llvm::DIType *CreateType(const ObjCObjectPointerType *Ty, llvm::DIFile *F);
145 llvm::DIType *CreateType(const PointerType *Ty, llvm::DIFile *F);
146 llvm::DIType *CreateType(const BlockPointerType *Ty, llvm::DIFile *F);
147 llvm::DIType *CreateType(const FunctionType *Ty, llvm::DIFile *F);
148 /// Get structure or union type.
149 llvm::DIType *CreateType(const RecordType *Tyg);
150 llvm::DIType *CreateTypeDefinition(const RecordType *Ty);
151 llvm::DICompositeType *CreateLimitedType(const RecordType *Ty);
152 void CollectContainingType(const CXXRecordDecl *RD,
153 llvm::DICompositeType *CT);
154 /// Get Objective-C interface type.
155 llvm::DIType *CreateType(const ObjCInterfaceType *Ty, llvm::DIFile *F);
156 llvm::DIType *CreateTypeDefinition(const ObjCInterfaceType *Ty,
158 /// Get Objective-C object type.
159 llvm::DIType *CreateType(const ObjCObjectType *Ty, llvm::DIFile *F);
160 llvm::DIType *CreateType(const ObjCTypeParamType *Ty, llvm::DIFile *Unit);
162 llvm::DIType *CreateType(const VectorType *Ty, llvm::DIFile *F);
163 llvm::DIType *CreateType(const ArrayType *Ty, llvm::DIFile *F);
164 llvm::DIType *CreateType(const LValueReferenceType *Ty, llvm::DIFile *F);
165 llvm::DIType *CreateType(const RValueReferenceType *Ty, llvm::DIFile *Unit);
166 llvm::DIType *CreateType(const MemberPointerType *Ty, llvm::DIFile *F);
167 llvm::DIType *CreateType(const AtomicType *Ty, llvm::DIFile *F);
168 llvm::DIType *CreateType(const PipeType *Ty, llvm::DIFile *F);
169 /// Get enumeration type.
170 llvm::DIType *CreateEnumType(const EnumType *Ty);
171 llvm::DIType *CreateTypeDefinition(const EnumType *Ty);
172 /// Look up the completed type for a self pointer in the TypeCache and
173 /// create a copy of it with the ObjectPointer and Artificial flags
174 /// set. If the type is not cached, a new one is created. This should
175 /// never happen though, since creating a type for the implicit self
176 /// argument implies that we already parsed the interface definition
177 /// and the ivar declarations in the implementation.
178 llvm::DIType *CreateSelfType(const QualType &QualTy, llvm::DIType *Ty);
181 /// Get the type from the cache or return null type if it doesn't
183 llvm::DIType *getTypeOrNull(const QualType);
184 /// Return the debug type for a C++ method.
185 /// \arg CXXMethodDecl is of FunctionType. This function type is
186 /// not updated to include implicit \c this pointer. Use this routine
187 /// to get a method type which includes \c this pointer.
188 llvm::DISubroutineType *getOrCreateMethodType(const CXXMethodDecl *Method,
190 llvm::DISubroutineType *
191 getOrCreateInstanceMethodType(QualType ThisPtr, const FunctionProtoType *Func,
193 llvm::DISubroutineType *
194 getOrCreateFunctionType(const Decl *D, QualType FnType, llvm::DIFile *F);
195 /// \return debug info descriptor for vtable.
196 llvm::DIType *getOrCreateVTablePtrType(llvm::DIFile *F);
198 /// \return namespace descriptor for the given namespace decl.
199 llvm::DINamespace *getOrCreateNamespace(const NamespaceDecl *N);
200 llvm::DIType *CreatePointerLikeType(llvm::dwarf::Tag Tag, const Type *Ty,
201 QualType PointeeTy, llvm::DIFile *F);
202 llvm::DIType *getOrCreateStructPtrType(StringRef Name, llvm::DIType *&Cache);
204 /// A helper function to create a subprogram for a single member
205 /// function GlobalDecl.
206 llvm::DISubprogram *CreateCXXMemberFunction(const CXXMethodDecl *Method,
208 llvm::DIType *RecordTy);
210 /// A helper function to collect debug info for C++ member
211 /// functions. This is used while creating debug info entry for a
213 void CollectCXXMemberFunctions(const CXXRecordDecl *Decl, llvm::DIFile *F,
214 SmallVectorImpl<llvm::Metadata *> &E,
217 /// A helper function to collect debug info for C++ base
218 /// classes. This is used while creating debug info entry for a
220 void CollectCXXBases(const CXXRecordDecl *Decl, llvm::DIFile *F,
221 SmallVectorImpl<llvm::Metadata *> &EltTys,
222 llvm::DIType *RecordTy);
224 /// Helper function for CollectCXXBases.
225 /// Adds debug info entries for types in Bases that are not in SeenTypes.
226 void CollectCXXBasesAux(const CXXRecordDecl *RD, llvm::DIFile *Unit,
227 SmallVectorImpl<llvm::Metadata *> &EltTys,
228 llvm::DIType *RecordTy,
229 const CXXRecordDecl::base_class_const_range &Bases,
230 llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes,
231 llvm::DINode::DIFlags StartingFlags);
233 /// A helper function to collect template parameters.
234 llvm::DINodeArray CollectTemplateParams(const TemplateParameterList *TPList,
235 ArrayRef<TemplateArgument> TAList,
237 /// A helper function to collect debug info for function template
239 llvm::DINodeArray CollectFunctionTemplateParams(const FunctionDecl *FD,
242 /// A helper function to collect debug info for template
245 CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
248 llvm::DIType *createFieldType(StringRef name, QualType type,
249 SourceLocation loc, AccessSpecifier AS,
250 uint64_t offsetInBits,
251 uint32_t AlignInBits,
252 llvm::DIFile *tunit, llvm::DIScope *scope,
253 const RecordDecl *RD = nullptr);
255 llvm::DIType *createFieldType(StringRef name, QualType type,
256 SourceLocation loc, AccessSpecifier AS,
257 uint64_t offsetInBits, llvm::DIFile *tunit,
258 llvm::DIScope *scope,
259 const RecordDecl *RD = nullptr) {
260 return createFieldType(name, type, loc, AS, offsetInBits, 0, tunit, scope,
264 /// Create new bit field member.
265 llvm::DIType *createBitFieldType(const FieldDecl *BitFieldDecl,
266 llvm::DIScope *RecordTy,
267 const RecordDecl *RD);
269 /// Helpers for collecting fields of a record.
271 void CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
272 SmallVectorImpl<llvm::Metadata *> &E,
273 llvm::DIType *RecordTy);
274 llvm::DIDerivedType *CreateRecordStaticField(const VarDecl *Var,
275 llvm::DIType *RecordTy,
276 const RecordDecl *RD);
277 void CollectRecordNormalField(const FieldDecl *Field, uint64_t OffsetInBits,
279 SmallVectorImpl<llvm::Metadata *> &E,
280 llvm::DIType *RecordTy, const RecordDecl *RD);
281 void CollectRecordNestedType(const TypeDecl *RD,
282 SmallVectorImpl<llvm::Metadata *> &E);
283 void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile *F,
284 SmallVectorImpl<llvm::Metadata *> &E,
285 llvm::DICompositeType *RecordTy);
287 /// If the C++ class has vtable info then insert appropriate debug
288 /// info entry in EltTys vector.
289 void CollectVTableInfo(const CXXRecordDecl *Decl, llvm::DIFile *F,
290 SmallVectorImpl<llvm::Metadata *> &EltTys,
291 llvm::DICompositeType *RecordTy);
294 /// Create a new lexical block node and push it on the stack.
295 void CreateLexicalBlock(SourceLocation Loc);
297 /// If target-specific LLVM \p AddressSpace directly maps to target-specific
298 /// DWARF address space, appends extended dereferencing mechanism to complex
299 /// expression \p Expr. Otherwise, does nothing.
301 /// Extended dereferencing mechanism is has the following format:
302 /// DW_OP_constu <DWARF Address Space> DW_OP_swap DW_OP_xderef
303 void AppendAddressSpaceXDeref(unsigned AddressSpace,
304 SmallVectorImpl<int64_t> &Expr) const;
307 CGDebugInfo(CodeGenModule &CGM);
312 /// Module debugging: Support for building PCMs.
314 /// Set the main CU's DwoId field to \p Signature.
315 void setDwoId(uint64_t Signature);
317 /// When generating debug information for a clang module or
318 /// precompiled header, this module map will be used to determine
319 /// the module of origin of each Decl.
320 void setModuleMap(ModuleMap &MMap) { ClangModuleMap = &MMap; }
322 /// When generating debug information for a clang module or
323 /// precompiled header, this module map will be used to determine
324 /// the module of origin of each Decl.
325 void setPCHDescriptor(ExternalASTSource::ASTSourceDescriptor PCH) {
330 /// Update the current source location. If \arg loc is invalid it is
332 void setLocation(SourceLocation Loc);
334 /// Return the current source location. This does not necessarily correspond
335 /// to the IRBuilder's current DebugLoc.
336 SourceLocation getLocation() const { return CurLoc; }
338 /// Update the current inline scope. All subsequent calls to \p EmitLocation
339 /// will create a location with this inlinedAt field.
340 void setInlinedAt(llvm::MDNode *InlinedAt) { CurInlinedAt = InlinedAt; }
342 /// \return the current inline scope.
343 llvm::MDNode *getInlinedAt() const { return CurInlinedAt; }
345 // Converts a SourceLocation to a DebugLoc
346 llvm::DebugLoc SourceLocToDebugLoc(SourceLocation Loc);
348 /// Emit metadata to indicate a change in line/column information in
349 /// the source file. If the location is invalid, the previous
350 /// location will be reused.
351 void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
353 /// Emit a call to llvm.dbg.function.start to indicate
354 /// start of a new function.
355 /// \param Loc The location of the function header.
356 /// \param ScopeLoc The location of the function body.
357 void EmitFunctionStart(GlobalDecl GD, SourceLocation Loc,
358 SourceLocation ScopeLoc, QualType FnType,
359 llvm::Function *Fn, CGBuilderTy &Builder);
361 /// Start a new scope for an inlined function.
362 void EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD);
363 /// End an inlined function scope.
364 void EmitInlineFunctionEnd(CGBuilderTy &Builder);
366 /// Emit debug info for a function declaration.
367 void EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, QualType FnType);
369 /// Constructs the debug code for exiting a function.
370 void EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn);
372 /// Emit metadata to indicate the beginning of a new lexical block
373 /// and push the block onto the stack.
374 void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
376 /// Emit metadata to indicate the end of a new lexical block and pop
377 /// the current block.
378 void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
380 /// Emit call to \c llvm.dbg.declare for an automatic variable
382 void EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
383 CGBuilderTy &Builder);
385 /// Emit call to \c llvm.dbg.declare for an imported variable
386 /// declaration in a block.
387 void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable,
388 llvm::Value *storage,
389 CGBuilderTy &Builder,
390 const CGBlockInfo &blockInfo,
391 llvm::Instruction *InsertPoint = nullptr);
393 /// Emit call to \c llvm.dbg.declare for an argument variable
395 void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
396 unsigned ArgNo, CGBuilderTy &Builder);
398 /// Emit call to \c llvm.dbg.declare for the block-literal argument
399 /// to a block invocation function.
400 void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
401 StringRef Name, unsigned ArgNo,
402 llvm::AllocaInst *LocalAddr,
403 CGBuilderTy &Builder);
405 /// Emit information about a global variable.
406 void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
408 /// Emit a constant global variable's debug info.
409 void EmitGlobalVariable(const ValueDecl *VD, const APValue &Init);
411 /// Emit C++ using directive.
412 void EmitUsingDirective(const UsingDirectiveDecl &UD);
414 /// Emit the type explicitly casted to.
415 void EmitExplicitCastType(QualType Ty);
417 /// Emit C++ using declaration.
418 void EmitUsingDecl(const UsingDecl &UD);
420 /// Emit an @import declaration.
421 void EmitImportDecl(const ImportDecl &ID);
423 /// Emit C++ namespace alias.
424 llvm::DIImportedEntity *EmitNamespaceAlias(const NamespaceAliasDecl &NA);
426 /// Emit record type's standalone debug info.
427 llvm::DIType *getOrCreateRecordType(QualType Ty, SourceLocation L);
429 /// Emit an Objective-C interface type standalone debug info.
430 llvm::DIType *getOrCreateInterfaceType(QualType Ty, SourceLocation Loc);
432 /// Emit standalone debug info for a type.
433 llvm::DIType *getOrCreateStandaloneType(QualType Ty, SourceLocation Loc);
435 void completeType(const EnumDecl *ED);
436 void completeType(const RecordDecl *RD);
437 void completeRequiredType(const RecordDecl *RD);
438 void completeClassData(const RecordDecl *RD);
439 void completeClass(const RecordDecl *RD);
441 void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD);
442 void completeUnusedClass(const CXXRecordDecl &D);
444 /// Create debug info for a macro defined by a #define directive or a macro
445 /// undefined by a #undef directive.
446 llvm::DIMacro *CreateMacro(llvm::DIMacroFile *Parent, unsigned MType,
447 SourceLocation LineLoc, StringRef Name,
450 /// Create debug info for a file referenced by an #include directive.
451 llvm::DIMacroFile *CreateTempMacroFile(llvm::DIMacroFile *Parent,
452 SourceLocation LineLoc,
453 SourceLocation FileLoc);
455 /// Emit call to llvm.dbg.declare for a variable declaration.
456 void EmitDeclare(const VarDecl *decl, llvm::Value *AI,
457 llvm::Optional<unsigned> ArgNo, CGBuilderTy &Builder);
459 /// Build up structure info for the byref. See \a BuildByRefType.
460 llvm::DIType *EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
463 /// Get context info for the DeclContext of \p Decl.
464 llvm::DIScope *getDeclContextDescriptor(const Decl *D);
465 /// Get context info for a given DeclContext \p Decl.
466 llvm::DIScope *getContextDescriptor(const Decl *Context,
467 llvm::DIScope *Default);
469 llvm::DIScope *getCurrentContextDescriptor(const Decl *Decl);
471 /// Create a forward decl for a RecordType in a given context.
472 llvm::DICompositeType *getOrCreateRecordFwdDecl(const RecordType *,
475 /// Return current directory name.
476 StringRef getCurrentDirname();
478 /// Create new compile unit.
479 void CreateCompileUnit();
481 /// Remap a given path with the current debug prefix map
482 std::string remapDIPath(StringRef) const;
484 /// Compute the file checksum debug info for input file ID.
485 llvm::DIFile::ChecksumKind computeChecksum(FileID FID,
486 SmallString<32> &Checksum) const;
488 /// Get the file debug info descriptor for the input location.
489 llvm::DIFile *getOrCreateFile(SourceLocation Loc);
491 /// Get the file info for main compile unit.
492 llvm::DIFile *getOrCreateMainFile();
494 /// Get the type from the cache or create a new type if necessary.
495 llvm::DIType *getOrCreateType(QualType Ty, llvm::DIFile *Fg);
497 /// Get a reference to a clang module. If \p CreateSkeletonCU is true,
498 /// this also creates a split dwarf skeleton compile unit.
500 getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod,
501 bool CreateSkeletonCU);
503 /// DebugTypeExtRefs: If \p D originated in a clang module, return it.
504 llvm::DIModule *getParentModuleOrNull(const Decl *D);
506 /// Get the type from the cache or create a new partial type if
508 llvm::DICompositeType *getOrCreateLimitedType(const RecordType *Ty,
511 /// Create type metadata for a source language type.
512 llvm::DIType *CreateTypeNode(QualType Ty, llvm::DIFile *Fg);
514 /// Create new member and increase Offset by FType's size.
515 llvm::DIType *CreateMemberType(llvm::DIFile *Unit, QualType FType,
516 StringRef Name, uint64_t *Offset);
518 /// Retrieve the DIDescriptor, if any, for the canonical form of this
520 llvm::DINode *getDeclarationOrDefinition(const Decl *D);
522 /// \return debug info descriptor to describe method
523 /// declaration for the given method definition.
524 llvm::DISubprogram *getFunctionDeclaration(const Decl *D);
526 /// \return debug info descriptor to describe in-class static data
527 /// member declaration for the given out-of-class definition. If D
528 /// is an out-of-class definition of a static data member of a
529 /// class, find its corresponding in-class declaration.
530 llvm::DIDerivedType *
531 getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D);
533 /// Helper that either creates a forward declaration or a stub.
534 llvm::DISubprogram *getFunctionFwdDeclOrStub(GlobalDecl GD, bool Stub);
536 /// Create a subprogram describing the forward declaration
537 /// represented in the given FunctionDecl wrapped in a GlobalDecl.
538 llvm::DISubprogram *getFunctionForwardDeclaration(GlobalDecl GD);
540 /// Create a DISubprogram describing the function
541 /// represented in the given FunctionDecl wrapped in a GlobalDecl.
542 llvm::DISubprogram *getFunctionStub(GlobalDecl GD);
544 /// Create a global variable describing the forward declaration
545 /// represented in the given VarDecl.
546 llvm::DIGlobalVariable *
547 getGlobalVariableForwardDeclaration(const VarDecl *VD);
549 /// Return a global variable that represents one of the collection of global
550 /// variables created for an anonmyous union.
552 /// Recursively collect all of the member fields of a global
553 /// anonymous decl and create static variables for them. The first
554 /// time this is called it needs to be on a union and then from
555 /// there we can have additional unnamed fields.
556 llvm::DIGlobalVariableExpression *
557 CollectAnonRecordDecls(const RecordDecl *RD, llvm::DIFile *Unit,
558 unsigned LineNo, StringRef LinkageName,
559 llvm::GlobalVariable *Var, llvm::DIScope *DContext);
561 /// Get the printing policy for producing names for debug info.
562 PrintingPolicy getPrintingPolicy() const;
564 /// Get function name for the given FunctionDecl. If the name is
565 /// constructed on demand (e.g., C++ destructor) then the name is
566 /// stored on the side.
567 StringRef getFunctionName(const FunctionDecl *FD);
569 /// Returns the unmangled name of an Objective-C method.
570 /// This is the display name for the debugging info.
571 StringRef getObjCMethodName(const ObjCMethodDecl *FD);
573 /// Return selector name. This is used for debugging
575 StringRef getSelectorName(Selector S);
577 /// Get class name including template argument list.
578 StringRef getClassName(const RecordDecl *RD);
580 /// Get the vtable name for the given class.
581 StringRef getVTableName(const CXXRecordDecl *Decl);
583 /// Get line number for the location. If location is invalid
584 /// then use current location.
585 unsigned getLineNumber(SourceLocation Loc);
587 /// Get column number for the location. If location is
588 /// invalid then use current location.
589 /// \param Force Assume DebugColumnInfo option is true.
590 unsigned getColumnNumber(SourceLocation Loc, bool Force = false);
592 /// Collect various properties of a FunctionDecl.
593 /// \param GD A GlobalDecl whose getDecl() must return a FunctionDecl.
594 void collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
595 StringRef &Name, StringRef &LinkageName,
596 llvm::DIScope *&FDContext,
597 llvm::DINodeArray &TParamsArray,
598 llvm::DINode::DIFlags &Flags);
600 /// Collect various properties of a VarDecl.
601 void collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
602 unsigned &LineNo, QualType &T, StringRef &Name,
603 StringRef &LinkageName, llvm::DIScope *&VDContext);
605 /// Allocate a copy of \p A using the DebugInfoNames allocator
606 /// and return a reference to it. If multiple arguments are given the strings
607 /// are concatenated.
608 StringRef internString(StringRef A, StringRef B = StringRef()) {
609 char *Data = DebugInfoNames.Allocate<char>(A.size() + B.size());
611 std::memcpy(Data, A.data(), A.size());
613 std::memcpy(Data + A.size(), B.data(), B.size());
614 return StringRef(Data, A.size() + B.size());
618 /// A scoped helper to set the current debug location to the specified
619 /// location or preferred location of the specified Expr.
620 class ApplyDebugLocation {
622 void init(SourceLocation TemporaryLocation, bool DefaultToEmpty = false);
623 ApplyDebugLocation(CodeGenFunction &CGF, bool DefaultToEmpty,
624 SourceLocation TemporaryLocation);
626 llvm::DebugLoc OriginalLocation;
627 CodeGenFunction *CGF;
630 /// Set the location to the (valid) TemporaryLocation.
631 ApplyDebugLocation(CodeGenFunction &CGF, SourceLocation TemporaryLocation);
632 ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E);
633 ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc);
634 ApplyDebugLocation(ApplyDebugLocation &&Other) : CGF(Other.CGF) {
638 ~ApplyDebugLocation();
640 /// \brief Apply TemporaryLocation if it is valid. Otherwise switch
641 /// to an artificial debug location that has a valid scope, but no
642 /// line information.
644 /// Artificial locations are useful when emitting compiler-generated
645 /// helper functions that have no source location associated with
646 /// them. The DWARF specification allows the compiler to use the
647 /// special line number 0 to indicate code that can not be
648 /// attributed to any source location. Note that passing an empty
649 /// SourceLocation to CGDebugInfo::setLocation() will result in the
650 /// last valid location being reused.
651 static ApplyDebugLocation CreateArtificial(CodeGenFunction &CGF) {
652 return ApplyDebugLocation(CGF, false, SourceLocation());
654 /// \brief Apply TemporaryLocation if it is valid. Otherwise switch
655 /// to an artificial debug location that has a valid scope, but no
656 /// line information.
657 static ApplyDebugLocation
658 CreateDefaultArtificial(CodeGenFunction &CGF,
659 SourceLocation TemporaryLocation) {
660 return ApplyDebugLocation(CGF, false, TemporaryLocation);
663 /// Set the IRBuilder to not attach debug locations. Note that
664 /// passing an empty SourceLocation to \a CGDebugInfo::setLocation()
665 /// will result in the last valid location being reused. Note that
666 /// all instructions that do not have a location at the beginning of
667 /// a function are counted towards to function prologue.
668 static ApplyDebugLocation CreateEmpty(CodeGenFunction &CGF) {
669 return ApplyDebugLocation(CGF, true, SourceLocation());
674 /// A scoped helper to set the current debug location to an inlined location.
675 class ApplyInlineDebugLocation {
676 SourceLocation SavedLocation;
677 CodeGenFunction *CGF;
680 /// Set up the CodeGenFunction's DebugInfo to produce inline locations for the
681 /// function \p InlinedFn. The current debug location becomes the inlined call
682 /// site of the inlined function.
683 ApplyInlineDebugLocation(CodeGenFunction &CGF, GlobalDecl InlinedFn);
684 /// Restore everything back to the orginial state.
685 ~ApplyInlineDebugLocation();
688 } // namespace CodeGen
691 #endif // LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H