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//===--- CGDebugInfo.h - DebugInfo for LLVM CodeGen -------------*- C++ -*-===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This is the source level debug info generator for llvm translation.
#include "clang/AST/Type.h"
#include "clang/AST/Expr.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/DebugInfo.h"
#include "llvm/DIBuilder.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/ValueHandle.h"
#include "llvm/Support/Allocator.h"
#include "CGBuilder.h"
namespace llvm {
class MDNode;
namespace clang {
class CXXMethodDecl;
class VarDecl;
class ObjCInterfaceDecl;
class ClassTemplateSpecializationDecl;
class GlobalDecl;
namespace CodeGen {
class CodeGenModule;
class CodeGenFunction;
class CGBlockInfo;
/// CGDebugInfo - This class gathers all debug information during compilation
/// and is responsible for emitting to llvm globals or pass directly to
/// the backend.
class CGDebugInfo {
CodeGenModule &CGM;
llvm::DIBuilder DBuilder;
llvm::DICompileUnit TheCU;
SourceLocation CurLoc, PrevLoc;
llvm::DIType VTablePtrType;
llvm::DIType ClassTy;
llvm::DIType ObjTy;
llvm::DIType SelTy;
/// TypeCache - Cache of previously constructed Types.
llvm::DenseMap<void *, llvm::WeakVH> TypeCache;
/// CompleteTypeCache - Cache of previously constructed complete RecordTypes.
llvm::DenseMap<void *, llvm::WeakVH> CompletedTypeCache;
/// ReplaceMap - Cache of forward declared types to RAUW at the end of
/// compilation.
std::vector<std::pair<void *, llvm::WeakVH> >ReplaceMap;
bool BlockLiteralGenericSet;
llvm::DIType BlockLiteralGeneric;
// LexicalBlockStack - Keep track of our current nested lexical block.
std::vector<llvm::TrackingVH<llvm::MDNode> > LexicalBlockStack;
llvm::DenseMap<const Decl *, llvm::WeakVH> RegionMap;
// FnBeginRegionCount - Keep track of LexicalBlockStack counter at the
// beginning of a function. This is used to pop unbalanced regions at
// the end of a function.
std::vector<unsigned> FnBeginRegionCount;
/// DebugInfoNames - This is a storage for names that are
/// constructed on demand. For example, C++ destructors, C++ operators etc..
llvm::BumpPtrAllocator DebugInfoNames;
StringRef CWDName;
llvm::DenseMap<const char *, llvm::WeakVH> DIFileCache;
llvm::DenseMap<const FunctionDecl *, llvm::WeakVH> SPCache;
llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH> NameSpaceCache;
/// Helper functions for getOrCreateType.
llvm::DIType CreateType(const BuiltinType *Ty);
llvm::DIType CreateType(const ComplexType *Ty);
llvm::DIType CreateQualifiedType(QualType Ty, llvm::DIFile F);
llvm::DIType CreateType(const TypedefType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const ObjCObjectPointerType *Ty,
llvm::DIFile F);
llvm::DIType CreateType(const PointerType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const BlockPointerType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const FunctionType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const RecordType *Ty);
llvm::DIType CreateLimitedType(const RecordType *Ty);
llvm::DIType CreateType(const ObjCInterfaceType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const ObjCObjectType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const VectorType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const ArrayType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const LValueReferenceType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const RValueReferenceType *Ty, llvm::DIFile Unit);
llvm::DIType CreateType(const MemberPointerType *Ty, llvm::DIFile F);
llvm::DIType CreateType(const AtomicType *Ty, llvm::DIFile F);
llvm::DIType CreateEnumType(const EnumDecl *ED);
llvm::DIType getTypeOrNull(const QualType);
llvm::DIType getCompletedTypeOrNull(const QualType);
llvm::DIType getOrCreateMethodType(const CXXMethodDecl *Method,
llvm::DIFile F);
llvm::DIType getOrCreateFunctionType(const Decl *D, QualType FnType,
llvm::DIFile F);
llvm::DIType getOrCreateVTablePtrType(llvm::DIFile F);
llvm::DINameSpace getOrCreateNameSpace(const NamespaceDecl *N);
llvm::DIType CreatePointeeType(QualType PointeeTy, llvm::DIFile F);
llvm::DIType CreatePointerLikeType(unsigned Tag,
const Type *Ty, QualType PointeeTy,
llvm::DIFile F);
llvm::DISubprogram CreateCXXMemberFunction(const CXXMethodDecl *Method,
llvm::DIFile F,
llvm::DIType RecordTy);
void CollectCXXMemberFunctions(const CXXRecordDecl *Decl,
llvm::DIFile F,
SmallVectorImpl<llvm::Value *> &E,
llvm::DIType T);
void CollectCXXFriends(const CXXRecordDecl *Decl,
llvm::DIFile F,
SmallVectorImpl<llvm::Value *> &EltTys,
llvm::DIType RecordTy);
void CollectCXXBases(const CXXRecordDecl *Decl,
llvm::DIFile F,
SmallVectorImpl<llvm::Value *> &EltTys,
llvm::DIType RecordTy);
CollectTemplateParams(const TemplateParameterList *TPList,
const TemplateArgumentList &TAList,
llvm::DIFile Unit);
CollectFunctionTemplateParams(const FunctionDecl *FD, llvm::DIFile Unit);
CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
llvm::DIFile F);
llvm::DIType createFieldType(StringRef name, QualType type,
uint64_t sizeInBitsOverride, SourceLocation loc,
AccessSpecifier AS, uint64_t offsetInBits,
llvm::DIFile tunit,
llvm::DIDescriptor scope);
void CollectRecordStaticVars(const RecordDecl *, llvm::DIType);
void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile F,
SmallVectorImpl<llvm::Value *> &E,
llvm::DIType RecordTy);
void CollectVTableInfo(const CXXRecordDecl *Decl,
llvm::DIFile F,
SmallVectorImpl<llvm::Value *> &EltTys);
// CreateLexicalBlock - Create a new lexical block node and push it on
// the stack.
void CreateLexicalBlock(SourceLocation Loc);
CGDebugInfo(CodeGenModule &CGM);
void finalize(void);
/// setLocation - Update the current source location. If \arg loc is
/// invalid it is ignored.
void setLocation(SourceLocation Loc);
/// EmitLocation - Emit metadata to indicate a change in line/column
/// information in the source file.
void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
/// EmitFunctionStart - Emit a call to llvm.dbg.function.start to indicate
/// start of a new function.
void EmitFunctionStart(GlobalDecl GD, QualType FnType,
llvm::Function *Fn, CGBuilderTy &Builder);
/// EmitFunctionEnd - Constructs the debug code for exiting a function.
void EmitFunctionEnd(CGBuilderTy &Builder);
/// EmitLexicalBlockStart - Emit metadata to indicate the beginning of a
/// new lexical block and push the block onto the stack.
void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
/// EmitLexicalBlockEnd - Emit metadata to indicate the end of a new lexical
/// block and pop the current block.
void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
/// EmitDeclareOfAutoVariable - Emit call to llvm.dbg.declare for an automatic
/// variable declaration.
void EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
CGBuilderTy &Builder);
/// EmitDeclareOfBlockDeclRefVariable - Emit call to llvm.dbg.declare for an
/// imported variable declaration in a block.
void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable,
llvm::Value *storage,
CGBuilderTy &Builder,
const CGBlockInfo &blockInfo);
/// EmitDeclareOfArgVariable - Emit call to llvm.dbg.declare for an argument
/// variable declaration.
void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
unsigned ArgNo, CGBuilderTy &Builder);
/// EmitDeclareOfBlockLiteralArgVariable - Emit call to
/// llvm.dbg.declare for the block-literal argument to a block
/// invocation function.
void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
llvm::Value *addr,
CGBuilderTy &Builder);
/// EmitGlobalVariable - Emit information about a global variable.
void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
/// EmitGlobalVariable - Emit information about an objective-c interface.
void EmitGlobalVariable(llvm::GlobalVariable *GV, ObjCInterfaceDecl *Decl);
/// EmitGlobalVariable - Emit global variable's debug info.
void EmitGlobalVariable(const ValueDecl *VD, llvm::Constant *Init);
/// getOrCreateRecordType - Emit record type's standalone debug info.
llvm::DIType getOrCreateRecordType(QualType Ty, SourceLocation L);
/// getOrCreateInterfaceType - Emit an objective c interface type standalone
/// debug info.
llvm::DIType getOrCreateInterfaceType(QualType Ty,
SourceLocation Loc);
/// EmitDeclare - Emit call to llvm.dbg.declare for a variable declaration.
void EmitDeclare(const VarDecl *decl, unsigned Tag, llvm::Value *AI,
unsigned ArgNo, CGBuilderTy &Builder);
// EmitTypeForVarWithBlocksAttr - Build up structure info for the byref.
// See BuildByRefType.
llvm::DIType EmitTypeForVarWithBlocksAttr(const ValueDecl *VD,
uint64_t *OffSet);
/// getContextDescriptor - Get context info for the decl.
llvm::DIDescriptor getContextDescriptor(const Decl *Decl);
/// createRecordFwdDecl - Create a forward decl for a RecordType in a given
/// context.
llvm::DIType createRecordFwdDecl(const RecordDecl *, llvm::DIDescriptor);
/// createContextChain - Create a set of decls for the context chain.
llvm::DIDescriptor createContextChain(const Decl *Decl);
/// getCurrentDirname - Return current directory name.
StringRef getCurrentDirname();
/// CreateCompileUnit - Create new compile unit.
void CreateCompileUnit();
/// getOrCreateFile - Get the file debug info descriptor for the input
/// location.
llvm::DIFile getOrCreateFile(SourceLocation Loc);
/// getOrCreateMainFile - Get the file info for main compile unit.
llvm::DIFile getOrCreateMainFile();
/// getOrCreateType - Get the type from the cache or create a new type if
/// necessary.
llvm::DIType getOrCreateType(QualType Ty, llvm::DIFile F);
/// getOrCreateLimitedType - Get the type from the cache or create a new
/// partial type if necessary.
llvm::DIType getOrCreateLimitedType(QualType Ty, llvm::DIFile F);
/// CreateTypeNode - Create type metadata for a source language type.
llvm::DIType CreateTypeNode(QualType Ty, llvm::DIFile F);
/// CreateLimitedTypeNode - Create type metadata for a source language
/// type, but only partial types for records.
llvm::DIType CreateLimitedTypeNode(QualType Ty, llvm::DIFile F);
/// CreateMemberType - Create new member and increase Offset by FType's size.
llvm::DIType CreateMemberType(llvm::DIFile Unit, QualType FType,
StringRef Name, uint64_t *Offset);
/// getFunctionDeclaration - Return debug info descriptor to describe method
/// declaration for the given method definition.
llvm::DISubprogram getFunctionDeclaration(const Decl *D);
/// getFunctionName - Get function name for the given FunctionDecl. If the
/// name is constructred on demand (e.g. C++ destructor) then the name
/// is stored on the side.
StringRef getFunctionName(const FunctionDecl *FD);
/// getObjCMethodName - Returns the unmangled name of an Objective-C method.
/// This is the display name for the debugging info.
StringRef getObjCMethodName(const ObjCMethodDecl *FD);
/// getSelectorName - Return selector name. This is used for debugging
/// info.
StringRef getSelectorName(Selector S);
/// getClassName - Get class name including template argument list.
StringRef getClassName(const RecordDecl *RD);
/// getVTableName - Get vtable name for the given Class.
StringRef getVTableName(const CXXRecordDecl *Decl);
/// getLineNumber - Get line number for the location. If location is invalid
/// then use current location.
unsigned getLineNumber(SourceLocation Loc);
/// getColumnNumber - Get column number for the location. If location is
/// invalid then use current location.
unsigned getColumnNumber(SourceLocation Loc);
} // namespace CodeGen
} // namespace clang