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 CLANG_CODEGEN_CGDEBUGINFO_H
15 #define CLANG_CODEGEN_CGDEBUGINFO_H
17 #include "CGBuilder.h"
18 #include "clang/AST/Expr.h"
19 #include "clang/AST/Type.h"
20 #include "clang/Basic/SourceLocation.h"
21 #include "llvm/ADT/DenseMap.h"
22 #include "llvm/DIBuilder.h"
23 #include "llvm/DebugInfo.h"
24 #include "llvm/Support/Allocator.h"
25 #include "llvm/Support/ValueHandle.h"
34 class ObjCInterfaceDecl;
36 class ClassTemplateSpecializationDecl;
41 class CodeGenFunction;
44 /// CGDebugInfo - This class gathers all debug information during compilation
45 /// and is responsible for emitting to llvm globals or pass directly to
49 llvm::DIBuilder DBuilder;
50 llvm::DICompileUnit TheCU;
51 SourceLocation CurLoc, PrevLoc;
52 llvm::DIType VTablePtrType;
56 llvm::DIType OCLImage1dDITy, OCLImage1dArrayDITy, OCLImage1dBufferDITy;
57 llvm::DIType OCLImage2dDITy, OCLImage2dArrayDITy;
58 llvm::DIType OCLImage3dDITy;
59 llvm::DIType OCLEventDITy;
61 /// TypeCache - Cache of previously constructed Types.
62 llvm::DenseMap<void *, llvm::WeakVH> TypeCache;
64 /// ObjCInterfaceCache - Cache of previously constructed interfaces
65 /// which may change. Storing a pair of DIType and checksum.
66 llvm::DenseMap<void *, std::pair<llvm::WeakVH, unsigned > >
69 /// CompleteTypeCache - Cache of previously constructed complete RecordTypes.
70 llvm::DenseMap<void *, llvm::WeakVH> CompletedTypeCache;
72 /// ReplaceMap - Cache of forward declared types to RAUW at the end of
74 std::vector<std::pair<void *, llvm::WeakVH> >ReplaceMap;
76 bool BlockLiteralGenericSet;
77 llvm::DIType BlockLiteralGeneric;
79 // LexicalBlockStack - Keep track of our current nested lexical block.
80 std::vector<llvm::TrackingVH<llvm::MDNode> > LexicalBlockStack;
81 llvm::DenseMap<const Decl *, llvm::WeakVH> RegionMap;
82 // FnBeginRegionCount - Keep track of LexicalBlockStack counter at the
83 // beginning of a function. This is used to pop unbalanced regions at
84 // the end of a function.
85 std::vector<unsigned> FnBeginRegionCount;
87 /// DebugInfoNames - This is a storage for names that are
88 /// constructed on demand. For example, C++ destructors, C++ operators etc..
89 llvm::BumpPtrAllocator DebugInfoNames;
92 llvm::DenseMap<const char *, llvm::WeakVH> DIFileCache;
93 llvm::DenseMap<const FunctionDecl *, llvm::WeakVH> SPCache;
94 llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH> NameSpaceCache;
95 llvm::DenseMap<const Decl *, llvm::WeakVH> StaticDataMemberCache;
97 /// Helper functions for getOrCreateType.
98 unsigned Checksum(const ObjCInterfaceDecl *InterfaceDecl);
99 llvm::DIType CreateType(const BuiltinType *Ty);
100 llvm::DIType CreateType(const ComplexType *Ty);
101 llvm::DIType CreateQualifiedType(QualType Ty, llvm::DIFile F);
102 llvm::DIType CreateType(const TypedefType *Ty, llvm::DIFile F);
103 llvm::DIType CreateType(const ObjCObjectPointerType *Ty,
105 llvm::DIType CreateType(const PointerType *Ty, llvm::DIFile F);
106 llvm::DIType CreateType(const BlockPointerType *Ty, llvm::DIFile F);
107 llvm::DIType CreateType(const FunctionType *Ty, llvm::DIFile F);
108 llvm::DIType CreateType(const RecordType *Ty);
109 llvm::DIType CreateLimitedType(const RecordType *Ty);
110 llvm::DIType CreateType(const ObjCInterfaceType *Ty, llvm::DIFile F);
111 llvm::DIType CreateType(const ObjCObjectType *Ty, llvm::DIFile F);
112 llvm::DIType CreateType(const VectorType *Ty, llvm::DIFile F);
113 llvm::DIType CreateType(const ArrayType *Ty, llvm::DIFile F);
114 llvm::DIType CreateType(const LValueReferenceType *Ty, llvm::DIFile F);
115 llvm::DIType CreateType(const RValueReferenceType *Ty, llvm::DIFile Unit);
116 llvm::DIType CreateType(const MemberPointerType *Ty, llvm::DIFile F);
117 llvm::DIType CreateType(const AtomicType *Ty, llvm::DIFile F);
118 llvm::DIType CreateEnumType(const EnumDecl *ED);
119 llvm::DIType getTypeOrNull(const QualType);
120 llvm::DIType getCompletedTypeOrNull(const QualType);
121 llvm::DIType getOrCreateMethodType(const CXXMethodDecl *Method,
123 llvm::DIType getOrCreateInstanceMethodType(
124 QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile Unit);
125 llvm::DIType getOrCreateFunctionType(const Decl *D, QualType FnType,
127 llvm::DIType getOrCreateVTablePtrType(llvm::DIFile F);
128 llvm::DINameSpace getOrCreateNameSpace(const NamespaceDecl *N);
129 llvm::DIType CreatePointeeType(QualType PointeeTy, llvm::DIFile F);
130 llvm::DIType CreatePointerLikeType(unsigned Tag,
131 const Type *Ty, QualType PointeeTy,
134 llvm::DIType getOrCreateStructPtrType(StringRef Name, llvm::DIType &Cache);
136 llvm::DISubprogram CreateCXXMemberFunction(const CXXMethodDecl *Method,
138 llvm::DIType RecordTy);
140 void CollectCXXMemberFunctions(const CXXRecordDecl *Decl,
142 SmallVectorImpl<llvm::Value *> &E,
145 void CollectCXXFriends(const CXXRecordDecl *Decl,
147 SmallVectorImpl<llvm::Value *> &EltTys,
148 llvm::DIType RecordTy);
150 void CollectCXXBases(const CXXRecordDecl *Decl,
152 SmallVectorImpl<llvm::Value *> &EltTys,
153 llvm::DIType RecordTy);
156 CollectTemplateParams(const TemplateParameterList *TPList,
157 const TemplateArgumentList &TAList,
160 CollectFunctionTemplateParams(const FunctionDecl *FD, llvm::DIFile Unit);
162 CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
165 llvm::DIType createFieldType(StringRef name, QualType type,
166 uint64_t sizeInBitsOverride, SourceLocation loc,
167 AccessSpecifier AS, uint64_t offsetInBits,
169 llvm::DIDescriptor scope);
171 // Helpers for collecting fields of a record.
172 void CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
173 SmallVectorImpl<llvm::Value *> &E,
174 llvm::DIType RecordTy);
175 void CollectRecordStaticField(const VarDecl *Var,
176 SmallVectorImpl<llvm::Value *> &E,
177 llvm::DIType RecordTy);
178 void CollectRecordNormalField(const FieldDecl *Field, uint64_t OffsetInBits,
180 SmallVectorImpl<llvm::Value *> &E,
181 llvm::DIType RecordTy);
182 void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile F,
183 SmallVectorImpl<llvm::Value *> &E,
184 llvm::DIType RecordTy);
186 void CollectVTableInfo(const CXXRecordDecl *Decl,
188 SmallVectorImpl<llvm::Value *> &EltTys);
190 // CreateLexicalBlock - Create a new lexical block node and push it on
192 void CreateLexicalBlock(SourceLocation Loc);
195 CGDebugInfo(CodeGenModule &CGM);
200 /// setLocation - Update the current source location. If \arg loc is
201 /// invalid it is ignored.
202 void setLocation(SourceLocation Loc);
204 /// EmitLocation - Emit metadata to indicate a change in line/column
205 /// information in the source file.
206 void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
208 /// EmitFunctionStart - Emit a call to llvm.dbg.function.start to indicate
209 /// start of a new function.
210 void EmitFunctionStart(GlobalDecl GD, QualType FnType,
211 llvm::Function *Fn, CGBuilderTy &Builder);
213 /// EmitFunctionEnd - Constructs the debug code for exiting a function.
214 void EmitFunctionEnd(CGBuilderTy &Builder);
216 /// EmitLexicalBlockStart - Emit metadata to indicate the beginning of a
217 /// new lexical block and push the block onto the stack.
218 void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
220 /// EmitLexicalBlockEnd - Emit metadata to indicate the end of a new lexical
221 /// block and pop the current block.
222 void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
224 /// EmitDeclareOfAutoVariable - Emit call to llvm.dbg.declare for an automatic
225 /// variable declaration.
226 void EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
227 CGBuilderTy &Builder);
229 /// EmitDeclareOfBlockDeclRefVariable - Emit call to llvm.dbg.declare for an
230 /// imported variable declaration in a block.
231 void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable,
232 llvm::Value *storage,
233 CGBuilderTy &Builder,
234 const CGBlockInfo &blockInfo);
236 /// EmitDeclareOfArgVariable - Emit call to llvm.dbg.declare for an argument
237 /// variable declaration.
238 void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
239 unsigned ArgNo, CGBuilderTy &Builder);
241 /// EmitDeclareOfBlockLiteralArgVariable - Emit call to
242 /// llvm.dbg.declare for the block-literal argument to a block
243 /// invocation function.
244 void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
246 CGBuilderTy &Builder);
248 /// EmitGlobalVariable - Emit information about a global variable.
249 void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
251 /// EmitGlobalVariable - Emit information about an objective-c interface.
252 void EmitGlobalVariable(llvm::GlobalVariable *GV, ObjCInterfaceDecl *Decl);
254 /// EmitGlobalVariable - Emit global variable's debug info.
255 void EmitGlobalVariable(const ValueDecl *VD, llvm::Constant *Init);
257 /// getOrCreateRecordType - Emit record type's standalone debug info.
258 llvm::DIType getOrCreateRecordType(QualType Ty, SourceLocation L);
260 /// getOrCreateInterfaceType - Emit an objective c interface type standalone
262 llvm::DIType getOrCreateInterfaceType(QualType Ty,
266 /// EmitDeclare - Emit call to llvm.dbg.declare for a variable declaration.
267 void EmitDeclare(const VarDecl *decl, unsigned Tag, llvm::Value *AI,
268 unsigned ArgNo, CGBuilderTy &Builder);
270 // EmitTypeForVarWithBlocksAttr - Build up structure info for the byref.
271 // See BuildByRefType.
272 llvm::DIType EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
275 /// getContextDescriptor - Get context info for the decl.
276 llvm::DIDescriptor getContextDescriptor(const Decl *Decl);
278 /// createRecordFwdDecl - Create a forward decl for a RecordType in a given
280 llvm::DIType createRecordFwdDecl(const RecordDecl *, llvm::DIDescriptor);
282 /// createContextChain - Create a set of decls for the context chain.
283 llvm::DIDescriptor createContextChain(const Decl *Decl);
285 /// getCurrentDirname - Return current directory name.
286 StringRef getCurrentDirname();
288 /// CreateCompileUnit - Create new compile unit.
289 void CreateCompileUnit();
291 /// getOrCreateFile - Get the file debug info descriptor for the input
293 llvm::DIFile getOrCreateFile(SourceLocation Loc);
295 /// getOrCreateMainFile - Get the file info for main compile unit.
296 llvm::DIFile getOrCreateMainFile();
298 /// getOrCreateType - Get the type from the cache or create a new type if
300 llvm::DIType getOrCreateType(QualType Ty, llvm::DIFile F);
302 /// getOrCreateLimitedType - Get the type from the cache or create a new
303 /// partial type if necessary.
304 llvm::DIType getOrCreateLimitedType(QualType Ty, llvm::DIFile F);
306 /// CreateTypeNode - Create type metadata for a source language type.
307 llvm::DIType CreateTypeNode(QualType Ty, llvm::DIFile F);
309 /// getObjCInterfaceDecl - return the underlying ObjCInterfaceDecl
310 /// if Ty is an ObjCInterface or a pointer to one.
311 ObjCInterfaceDecl* getObjCInterfaceDecl(QualType Ty);
313 /// CreateLimitedTypeNode - Create type metadata for a source language
314 /// type, but only partial types for records.
315 llvm::DIType CreateLimitedTypeNode(QualType Ty, llvm::DIFile F);
317 /// CreateMemberType - Create new member and increase Offset by FType's size.
318 llvm::DIType CreateMemberType(llvm::DIFile Unit, QualType FType,
319 StringRef Name, uint64_t *Offset);
321 /// getFunctionDeclaration - Return debug info descriptor to describe method
322 /// declaration for the given method definition.
323 llvm::DISubprogram getFunctionDeclaration(const Decl *D);
325 /// getStaticDataMemberDeclaration - Return debug info descriptor to
326 /// describe in-class static data member declaration for the given
327 /// out-of-class definition.
328 llvm::DIDerivedType getStaticDataMemberDeclaration(const Decl *D);
330 /// getFunctionName - Get function name for the given FunctionDecl. If the
331 /// name is constructred on demand (e.g. C++ destructor) then the name
332 /// is stored on the side.
333 StringRef getFunctionName(const FunctionDecl *FD);
335 /// getObjCMethodName - Returns the unmangled name of an Objective-C method.
336 /// This is the display name for the debugging info.
337 StringRef getObjCMethodName(const ObjCMethodDecl *FD);
339 /// getSelectorName - Return selector name. This is used for debugging
341 StringRef getSelectorName(Selector S);
343 /// getClassName - Get class name including template argument list.
344 StringRef getClassName(const RecordDecl *RD);
346 /// getVTableName - Get vtable name for the given Class.
347 StringRef getVTableName(const CXXRecordDecl *Decl);
349 /// getLineNumber - Get line number for the location. If location is invalid
350 /// then use current location.
351 unsigned getLineNumber(SourceLocation Loc);
353 /// getColumnNumber - Get column number for the location. If location is
354 /// invalid then use current location.
355 unsigned getColumnNumber(SourceLocation Loc);
357 } // namespace CodeGen