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814 lines
35 KiB
814 lines
35 KiB
//===--- CGDebugInfo.h - DebugInfo for LLVM CodeGen -------------*- 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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//
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// This is the source-level debug info generator for llvm translation.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
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#define LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
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#include "CGBuilder.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/ExternalASTSource.h"
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#include "clang/AST/PrettyPrinter.h"
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#include "clang/AST/Type.h"
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#include "clang/AST/TypeOrdering.h"
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#include "clang/Basic/CodeGenOptions.h"
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#include "clang/Basic/Module.h"
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#include "clang/Basic/SourceLocation.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/ValueHandle.h"
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#include "llvm/Support/Allocator.h"
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namespace llvm {
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class MDNode;
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}
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namespace clang {
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class ClassTemplateSpecializationDecl;
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class GlobalDecl;
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class ModuleMap;
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class ObjCInterfaceDecl;
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class ObjCIvarDecl;
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class UsingDecl;
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class VarDecl;
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enum class DynamicInitKind : unsigned;
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namespace CodeGen {
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class CodeGenModule;
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class CodeGenFunction;
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class CGBlockInfo;
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/// This class gathers all debug information during compilation and is
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/// responsible for emitting to llvm globals or pass directly to the
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/// backend.
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class CGDebugInfo {
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friend class ApplyDebugLocation;
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friend class SaveAndRestoreLocation;
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CodeGenModule &CGM;
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const codegenoptions::DebugInfoKind DebugKind;
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bool DebugTypeExtRefs;
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llvm::DIBuilder DBuilder;
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llvm::DICompileUnit *TheCU = nullptr;
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ModuleMap *ClangModuleMap = nullptr;
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ASTSourceDescriptor PCHDescriptor;
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SourceLocation CurLoc;
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llvm::MDNode *CurInlinedAt = nullptr;
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llvm::DIType *VTablePtrType = nullptr;
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llvm::DIType *ClassTy = nullptr;
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llvm::DICompositeType *ObjTy = nullptr;
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llvm::DIType *SelTy = nullptr;
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#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
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llvm::DIType *SingletonId = nullptr;
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#include "clang/Basic/OpenCLImageTypes.def"
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llvm::DIType *OCLSamplerDITy = nullptr;
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llvm::DIType *OCLEventDITy = nullptr;
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llvm::DIType *OCLClkEventDITy = nullptr;
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llvm::DIType *OCLQueueDITy = nullptr;
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llvm::DIType *OCLNDRangeDITy = nullptr;
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llvm::DIType *OCLReserveIDDITy = nullptr;
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#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
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llvm::DIType *Id##Ty = nullptr;
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#include "clang/Basic/OpenCLExtensionTypes.def"
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/// Cache of previously constructed Types.
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llvm::DenseMap<const void *, llvm::TrackingMDRef> TypeCache;
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std::map<llvm::StringRef, llvm::StringRef, std::greater<llvm::StringRef>>
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DebugPrefixMap;
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/// Cache that maps VLA types to size expressions for that type,
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/// represented by instantiated Metadata nodes.
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llvm::SmallDenseMap<QualType, llvm::Metadata *> SizeExprCache;
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/// Callbacks to use when printing names and types.
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class PrintingCallbacks final : public clang::PrintingCallbacks {
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const CGDebugInfo &Self;
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public:
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PrintingCallbacks(const CGDebugInfo &Self) : Self(Self) {}
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std::string remapPath(StringRef Path) const override {
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return Self.remapDIPath(Path);
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}
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};
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PrintingCallbacks PrintCB = {*this};
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struct ObjCInterfaceCacheEntry {
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const ObjCInterfaceType *Type;
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llvm::DIType *Decl;
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llvm::DIFile *Unit;
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ObjCInterfaceCacheEntry(const ObjCInterfaceType *Type, llvm::DIType *Decl,
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llvm::DIFile *Unit)
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: Type(Type), Decl(Decl), Unit(Unit) {}
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};
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/// Cache of previously constructed interfaces which may change.
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llvm::SmallVector<ObjCInterfaceCacheEntry, 32> ObjCInterfaceCache;
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/// Cache of forward declarations for methods belonging to the interface.
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/// The extra bit on the DISubprogram specifies whether a method is
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/// "objc_direct".
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llvm::DenseMap<const ObjCInterfaceDecl *,
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std::vector<llvm::PointerIntPair<llvm::DISubprogram *, 1>>>
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ObjCMethodCache;
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/// Cache of references to clang modules and precompiled headers.
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llvm::DenseMap<const Module *, llvm::TrackingMDRef> ModuleCache;
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/// List of interfaces we want to keep even if orphaned.
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std::vector<void *> RetainedTypes;
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/// Cache of forward declared types to RAUW at the end of compilation.
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std::vector<std::pair<const TagType *, llvm::TrackingMDRef>> ReplaceMap;
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/// Cache of replaceable forward declarations (functions and
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/// variables) to RAUW at the end of compilation.
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std::vector<std::pair<const DeclaratorDecl *, llvm::TrackingMDRef>>
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FwdDeclReplaceMap;
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/// Keep track of our current nested lexical block.
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std::vector<llvm::TypedTrackingMDRef<llvm::DIScope>> LexicalBlockStack;
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llvm::DenseMap<const Decl *, llvm::TrackingMDRef> RegionMap;
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/// Keep track of LexicalBlockStack counter at the beginning of a
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/// function. This is used to pop unbalanced regions at the end of a
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/// function.
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std::vector<unsigned> FnBeginRegionCount;
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/// This is a storage for names that are constructed on demand. For
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/// example, C++ destructors, C++ operators etc..
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llvm::BumpPtrAllocator DebugInfoNames;
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StringRef CWDName;
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llvm::DenseMap<const char *, llvm::TrackingMDRef> DIFileCache;
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llvm::DenseMap<const FunctionDecl *, llvm::TrackingMDRef> SPCache;
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/// Cache declarations relevant to DW_TAG_imported_declarations (C++
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/// using declarations) that aren't covered by other more specific caches.
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llvm::DenseMap<const Decl *, llvm::TrackingMDRef> DeclCache;
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llvm::DenseMap<const NamespaceDecl *, llvm::TrackingMDRef> NamespaceCache;
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llvm::DenseMap<const NamespaceAliasDecl *, llvm::TrackingMDRef>
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NamespaceAliasCache;
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llvm::DenseMap<const Decl *, llvm::TypedTrackingMDRef<llvm::DIDerivedType>>
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StaticDataMemberCache;
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/// Helper functions for getOrCreateType.
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/// @{
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/// Currently the checksum of an interface includes the number of
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/// ivars and property accessors.
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llvm::DIType *CreateType(const BuiltinType *Ty);
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llvm::DIType *CreateType(const ComplexType *Ty);
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llvm::DIType *CreateType(const AutoType *Ty);
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llvm::DIType *CreateType(const ExtIntType *Ty);
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llvm::DIType *CreateQualifiedType(QualType Ty, llvm::DIFile *Fg);
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llvm::DIType *CreateType(const TypedefType *Ty, llvm::DIFile *Fg);
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llvm::DIType *CreateType(const TemplateSpecializationType *Ty,
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llvm::DIFile *Fg);
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llvm::DIType *CreateType(const ObjCObjectPointerType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const PointerType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const BlockPointerType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const FunctionType *Ty, llvm::DIFile *F);
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/// Get structure or union type.
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llvm::DIType *CreateType(const RecordType *Tyg);
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llvm::DIType *CreateTypeDefinition(const RecordType *Ty);
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llvm::DICompositeType *CreateLimitedType(const RecordType *Ty);
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void CollectContainingType(const CXXRecordDecl *RD,
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llvm::DICompositeType *CT);
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/// Get Objective-C interface type.
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llvm::DIType *CreateType(const ObjCInterfaceType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateTypeDefinition(const ObjCInterfaceType *Ty,
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llvm::DIFile *F);
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/// Get Objective-C object type.
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llvm::DIType *CreateType(const ObjCObjectType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const ObjCTypeParamType *Ty, llvm::DIFile *Unit);
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llvm::DIType *CreateType(const VectorType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const ConstantMatrixType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const ArrayType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const LValueReferenceType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const RValueReferenceType *Ty, llvm::DIFile *Unit);
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llvm::DIType *CreateType(const MemberPointerType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const AtomicType *Ty, llvm::DIFile *F);
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llvm::DIType *CreateType(const PipeType *Ty, llvm::DIFile *F);
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/// Get enumeration type.
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llvm::DIType *CreateEnumType(const EnumType *Ty);
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llvm::DIType *CreateTypeDefinition(const EnumType *Ty);
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/// Look up the completed type for a self pointer in the TypeCache and
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/// create a copy of it with the ObjectPointer and Artificial flags
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/// set. If the type is not cached, a new one is created. This should
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/// never happen though, since creating a type for the implicit self
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/// argument implies that we already parsed the interface definition
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/// and the ivar declarations in the implementation.
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llvm::DIType *CreateSelfType(const QualType &QualTy, llvm::DIType *Ty);
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/// @}
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/// Get the type from the cache or return null type if it doesn't
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/// exist.
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llvm::DIType *getTypeOrNull(const QualType);
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/// Return the debug type for a C++ method.
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/// \arg CXXMethodDecl is of FunctionType. This function type is
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/// not updated to include implicit \c this pointer. Use this routine
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/// to get a method type which includes \c this pointer.
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llvm::DISubroutineType *getOrCreateMethodType(const CXXMethodDecl *Method,
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llvm::DIFile *F, bool decl);
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llvm::DISubroutineType *
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getOrCreateInstanceMethodType(QualType ThisPtr, const FunctionProtoType *Func,
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llvm::DIFile *Unit, bool decl);
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llvm::DISubroutineType *
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getOrCreateFunctionType(const Decl *D, QualType FnType, llvm::DIFile *F);
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/// \return debug info descriptor for vtable.
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llvm::DIType *getOrCreateVTablePtrType(llvm::DIFile *F);
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/// \return namespace descriptor for the given namespace decl.
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llvm::DINamespace *getOrCreateNamespace(const NamespaceDecl *N);
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llvm::DIType *CreatePointerLikeType(llvm::dwarf::Tag Tag, const Type *Ty,
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QualType PointeeTy, llvm::DIFile *F);
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llvm::DIType *getOrCreateStructPtrType(StringRef Name, llvm::DIType *&Cache);
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/// A helper function to create a subprogram for a single member
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/// function GlobalDecl.
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llvm::DISubprogram *CreateCXXMemberFunction(const CXXMethodDecl *Method,
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llvm::DIFile *F,
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llvm::DIType *RecordTy);
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/// A helper function to collect debug info for C++ member
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/// functions. This is used while creating debug info entry for a
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/// Record.
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void CollectCXXMemberFunctions(const CXXRecordDecl *Decl, llvm::DIFile *F,
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SmallVectorImpl<llvm::Metadata *> &E,
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llvm::DIType *T);
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/// A helper function to collect debug info for C++ base
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/// classes. This is used while creating debug info entry for a
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/// Record.
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void CollectCXXBases(const CXXRecordDecl *Decl, llvm::DIFile *F,
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SmallVectorImpl<llvm::Metadata *> &EltTys,
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llvm::DIType *RecordTy);
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/// Helper function for CollectCXXBases.
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/// Adds debug info entries for types in Bases that are not in SeenTypes.
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void CollectCXXBasesAux(
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const CXXRecordDecl *RD, llvm::DIFile *Unit,
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SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy,
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const CXXRecordDecl::base_class_const_range &Bases,
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llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes,
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llvm::DINode::DIFlags StartingFlags);
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/// A helper function to collect template parameters.
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llvm::DINodeArray CollectTemplateParams(const TemplateParameterList *TPList,
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ArrayRef<TemplateArgument> TAList,
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llvm::DIFile *Unit);
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/// A helper function to collect debug info for function template
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/// parameters.
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llvm::DINodeArray CollectFunctionTemplateParams(const FunctionDecl *FD,
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llvm::DIFile *Unit);
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/// A helper function to collect debug info for function template
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/// parameters.
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llvm::DINodeArray CollectVarTemplateParams(const VarDecl *VD,
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llvm::DIFile *Unit);
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/// A helper function to collect debug info for template
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/// parameters.
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llvm::DINodeArray
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CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
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llvm::DIFile *F);
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llvm::DIType *createFieldType(StringRef name, QualType type,
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SourceLocation loc, AccessSpecifier AS,
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uint64_t offsetInBits, uint32_t AlignInBits,
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llvm::DIFile *tunit, llvm::DIScope *scope,
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const RecordDecl *RD = nullptr);
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llvm::DIType *createFieldType(StringRef name, QualType type,
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SourceLocation loc, AccessSpecifier AS,
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uint64_t offsetInBits, llvm::DIFile *tunit,
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llvm::DIScope *scope,
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const RecordDecl *RD = nullptr) {
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return createFieldType(name, type, loc, AS, offsetInBits, 0, tunit, scope,
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RD);
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}
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/// Create new bit field member.
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llvm::DIType *createBitFieldType(const FieldDecl *BitFieldDecl,
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llvm::DIScope *RecordTy,
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const RecordDecl *RD);
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/// Helpers for collecting fields of a record.
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/// @{
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void CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
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SmallVectorImpl<llvm::Metadata *> &E,
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llvm::DIType *RecordTy);
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llvm::DIDerivedType *CreateRecordStaticField(const VarDecl *Var,
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llvm::DIType *RecordTy,
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const RecordDecl *RD);
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void CollectRecordNormalField(const FieldDecl *Field, uint64_t OffsetInBits,
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llvm::DIFile *F,
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SmallVectorImpl<llvm::Metadata *> &E,
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llvm::DIType *RecordTy, const RecordDecl *RD);
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void CollectRecordNestedType(const TypeDecl *RD,
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SmallVectorImpl<llvm::Metadata *> &E);
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void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile *F,
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SmallVectorImpl<llvm::Metadata *> &E,
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llvm::DICompositeType *RecordTy);
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/// If the C++ class has vtable info then insert appropriate debug
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/// info entry in EltTys vector.
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void CollectVTableInfo(const CXXRecordDecl *Decl, llvm::DIFile *F,
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SmallVectorImpl<llvm::Metadata *> &EltTys,
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llvm::DICompositeType *RecordTy);
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/// @}
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/// Create a new lexical block node and push it on the stack.
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void CreateLexicalBlock(SourceLocation Loc);
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/// If target-specific LLVM \p AddressSpace directly maps to target-specific
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/// DWARF address space, appends extended dereferencing mechanism to complex
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/// expression \p Expr. Otherwise, does nothing.
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///
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/// Extended dereferencing mechanism is has the following format:
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/// DW_OP_constu <DWARF Address Space> DW_OP_swap DW_OP_xderef
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void AppendAddressSpaceXDeref(unsigned AddressSpace,
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SmallVectorImpl<int64_t> &Expr) const;
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/// A helper function to collect debug info for the default elements of a
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/// block.
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///
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/// \returns The next available field offset after the default elements.
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uint64_t collectDefaultElementTypesForBlockPointer(
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const BlockPointerType *Ty, llvm::DIFile *Unit,
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llvm::DIDerivedType *DescTy, unsigned LineNo,
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SmallVectorImpl<llvm::Metadata *> &EltTys);
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/// A helper function to collect debug info for the default fields of a
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/// block.
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void collectDefaultFieldsForBlockLiteralDeclare(
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const CGBlockInfo &Block, const ASTContext &Context, SourceLocation Loc,
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const llvm::StructLayout &BlockLayout, llvm::DIFile *Unit,
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SmallVectorImpl<llvm::Metadata *> &Fields);
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public:
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CGDebugInfo(CodeGenModule &CGM);
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~CGDebugInfo();
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void finalize();
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/// Remap a given path with the current debug prefix map
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std::string remapDIPath(StringRef) const;
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/// Register VLA size expression debug node with the qualified type.
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void registerVLASizeExpression(QualType Ty, llvm::Metadata *SizeExpr) {
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SizeExprCache[Ty] = SizeExpr;
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}
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/// Module debugging: Support for building PCMs.
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/// @{
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/// Set the main CU's DwoId field to \p Signature.
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void setDwoId(uint64_t Signature);
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/// When generating debug information for a clang module or
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/// precompiled header, this module map will be used to determine
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/// the module of origin of each Decl.
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void setModuleMap(ModuleMap &MMap) { ClangModuleMap = &MMap; }
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/// When generating debug information for a clang module or
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/// precompiled header, this module map will be used to determine
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/// the module of origin of each Decl.
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void setPCHDescriptor(ASTSourceDescriptor PCH) { PCHDescriptor = PCH; }
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/// @}
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/// Update the current source location. If \arg loc is invalid it is
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/// ignored.
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void setLocation(SourceLocation Loc);
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/// Return the current source location. This does not necessarily correspond
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/// to the IRBuilder's current DebugLoc.
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SourceLocation getLocation() const { return CurLoc; }
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/// Update the current inline scope. All subsequent calls to \p EmitLocation
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/// will create a location with this inlinedAt field.
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void setInlinedAt(llvm::MDNode *InlinedAt) { CurInlinedAt = InlinedAt; }
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/// \return the current inline scope.
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llvm::MDNode *getInlinedAt() const { return CurInlinedAt; }
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// Converts a SourceLocation to a DebugLoc
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llvm::DebugLoc SourceLocToDebugLoc(SourceLocation Loc);
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/// Emit metadata to indicate a change in line/column information in
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/// the source file. If the location is invalid, the previous
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/// location will be reused.
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void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
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/// Emit a call to llvm.dbg.function.start to indicate
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/// start of a new function.
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/// \param Loc The location of the function header.
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/// \param ScopeLoc The location of the function body.
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void EmitFunctionStart(GlobalDecl GD, SourceLocation Loc,
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SourceLocation ScopeLoc, QualType FnType,
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llvm::Function *Fn, bool CurFnIsThunk,
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CGBuilderTy &Builder);
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/// Start a new scope for an inlined function.
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void EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD);
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/// End an inlined function scope.
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void EmitInlineFunctionEnd(CGBuilderTy &Builder);
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/// Emit debug info for a function declaration.
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/// \p Fn is set only when a declaration for a debug call site gets created.
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void EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc,
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QualType FnType, llvm::Function *Fn = nullptr);
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/// Emit debug info for an extern function being called.
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/// This is needed for call site debug info.
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void EmitFuncDeclForCallSite(llvm::CallBase *CallOrInvoke,
|
|
QualType CalleeType,
|
|
const FunctionDecl *CalleeDecl);
|
|
|
|
/// Constructs the debug code for exiting a function.
|
|
void EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn);
|
|
|
|
/// Emit metadata to indicate the beginning of a new lexical block
|
|
/// and push the block onto the stack.
|
|
void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
|
|
|
|
/// Emit metadata to indicate the end of a new lexical block and pop
|
|
/// the current block.
|
|
void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
|
|
|
|
/// Emit call to \c llvm.dbg.declare for an automatic variable
|
|
/// declaration.
|
|
/// Returns a pointer to the DILocalVariable associated with the
|
|
/// llvm.dbg.declare, or nullptr otherwise.
|
|
llvm::DILocalVariable *
|
|
EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
|
|
CGBuilderTy &Builder,
|
|
const bool UsePointerValue = false);
|
|
|
|
/// Emit call to \c llvm.dbg.label for an label.
|
|
void EmitLabel(const LabelDecl *D, CGBuilderTy &Builder);
|
|
|
|
/// Emit call to \c llvm.dbg.declare for an imported variable
|
|
/// declaration in a block.
|
|
void EmitDeclareOfBlockDeclRefVariable(
|
|
const VarDecl *variable, llvm::Value *storage, CGBuilderTy &Builder,
|
|
const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint = nullptr);
|
|
|
|
/// Emit call to \c llvm.dbg.declare for an argument variable
|
|
/// declaration.
|
|
void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
|
|
unsigned ArgNo, CGBuilderTy &Builder);
|
|
|
|
/// Emit call to \c llvm.dbg.declare for the block-literal argument
|
|
/// to a block invocation function.
|
|
void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
|
|
StringRef Name, unsigned ArgNo,
|
|
llvm::AllocaInst *LocalAddr,
|
|
CGBuilderTy &Builder);
|
|
|
|
/// Emit information about a global variable.
|
|
void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
|
|
|
|
/// Emit a constant global variable's debug info.
|
|
void EmitGlobalVariable(const ValueDecl *VD, const APValue &Init);
|
|
|
|
/// Emit information about an external variable.
|
|
void EmitExternalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
|
|
|
|
/// Emit C++ using directive.
|
|
void EmitUsingDirective(const UsingDirectiveDecl &UD);
|
|
|
|
/// Emit the type explicitly casted to.
|
|
void EmitExplicitCastType(QualType Ty);
|
|
|
|
/// Emit the type even if it might not be used.
|
|
void EmitAndRetainType(QualType Ty);
|
|
|
|
/// Emit C++ using declaration.
|
|
void EmitUsingDecl(const UsingDecl &UD);
|
|
|
|
/// Emit an @import declaration.
|
|
void EmitImportDecl(const ImportDecl &ID);
|
|
|
|
/// Emit C++ namespace alias.
|
|
llvm::DIImportedEntity *EmitNamespaceAlias(const NamespaceAliasDecl &NA);
|
|
|
|
/// Emit record type's standalone debug info.
|
|
llvm::DIType *getOrCreateRecordType(QualType Ty, SourceLocation L);
|
|
|
|
/// Emit an Objective-C interface type standalone debug info.
|
|
llvm::DIType *getOrCreateInterfaceType(QualType Ty, SourceLocation Loc);
|
|
|
|
/// Emit standalone debug info for a type.
|
|
llvm::DIType *getOrCreateStandaloneType(QualType Ty, SourceLocation Loc);
|
|
|
|
/// Add heapallocsite metadata for MSAllocator calls.
|
|
void addHeapAllocSiteMetadata(llvm::CallBase *CallSite, QualType AllocatedTy,
|
|
SourceLocation Loc);
|
|
|
|
void completeType(const EnumDecl *ED);
|
|
void completeType(const RecordDecl *RD);
|
|
void completeRequiredType(const RecordDecl *RD);
|
|
void completeClassData(const RecordDecl *RD);
|
|
void completeClass(const RecordDecl *RD);
|
|
|
|
void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD);
|
|
void completeUnusedClass(const CXXRecordDecl &D);
|
|
|
|
/// Create debug info for a macro defined by a #define directive or a macro
|
|
/// undefined by a #undef directive.
|
|
llvm::DIMacro *CreateMacro(llvm::DIMacroFile *Parent, unsigned MType,
|
|
SourceLocation LineLoc, StringRef Name,
|
|
StringRef Value);
|
|
|
|
/// Create debug info for a file referenced by an #include directive.
|
|
llvm::DIMacroFile *CreateTempMacroFile(llvm::DIMacroFile *Parent,
|
|
SourceLocation LineLoc,
|
|
SourceLocation FileLoc);
|
|
|
|
private:
|
|
/// Emit call to llvm.dbg.declare for a variable declaration.
|
|
/// Returns a pointer to the DILocalVariable associated with the
|
|
/// llvm.dbg.declare, or nullptr otherwise.
|
|
llvm::DILocalVariable *EmitDeclare(const VarDecl *decl, llvm::Value *AI,
|
|
llvm::Optional<unsigned> ArgNo,
|
|
CGBuilderTy &Builder,
|
|
const bool UsePointerValue = false);
|
|
|
|
struct BlockByRefType {
|
|
/// The wrapper struct used inside the __block_literal struct.
|
|
llvm::DIType *BlockByRefWrapper;
|
|
/// The type as it appears in the source code.
|
|
llvm::DIType *WrappedType;
|
|
};
|
|
|
|
/// Build up structure info for the byref. See \a BuildByRefType.
|
|
BlockByRefType EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
|
|
uint64_t *OffSet);
|
|
|
|
/// Get context info for the DeclContext of \p Decl.
|
|
llvm::DIScope *getDeclContextDescriptor(const Decl *D);
|
|
/// Get context info for a given DeclContext \p Decl.
|
|
llvm::DIScope *getContextDescriptor(const Decl *Context,
|
|
llvm::DIScope *Default);
|
|
|
|
llvm::DIScope *getCurrentContextDescriptor(const Decl *Decl);
|
|
|
|
/// Create a forward decl for a RecordType in a given context.
|
|
llvm::DICompositeType *getOrCreateRecordFwdDecl(const RecordType *,
|
|
llvm::DIScope *);
|
|
|
|
/// Return current directory name.
|
|
StringRef getCurrentDirname();
|
|
|
|
/// Create new compile unit.
|
|
void CreateCompileUnit();
|
|
|
|
/// Compute the file checksum debug info for input file ID.
|
|
Optional<llvm::DIFile::ChecksumKind>
|
|
computeChecksum(FileID FID, SmallString<32> &Checksum) const;
|
|
|
|
/// Get the source of the given file ID.
|
|
Optional<StringRef> getSource(const SourceManager &SM, FileID FID);
|
|
|
|
/// Convenience function to get the file debug info descriptor for the input
|
|
/// location.
|
|
llvm::DIFile *getOrCreateFile(SourceLocation Loc);
|
|
|
|
/// Create a file debug info descriptor for a source file.
|
|
llvm::DIFile *
|
|
createFile(StringRef FileName,
|
|
Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo,
|
|
Optional<StringRef> Source);
|
|
|
|
/// Get the type from the cache or create a new type if necessary.
|
|
llvm::DIType *getOrCreateType(QualType Ty, llvm::DIFile *Fg);
|
|
|
|
/// Get a reference to a clang module. If \p CreateSkeletonCU is true,
|
|
/// this also creates a split dwarf skeleton compile unit.
|
|
llvm::DIModule *getOrCreateModuleRef(ASTSourceDescriptor Mod,
|
|
bool CreateSkeletonCU);
|
|
|
|
/// DebugTypeExtRefs: If \p D originated in a clang module, return it.
|
|
llvm::DIModule *getParentModuleOrNull(const Decl *D);
|
|
|
|
/// Get the type from the cache or create a new partial type if
|
|
/// necessary.
|
|
llvm::DICompositeType *getOrCreateLimitedType(const RecordType *Ty,
|
|
llvm::DIFile *F);
|
|
|
|
/// Create type metadata for a source language type.
|
|
llvm::DIType *CreateTypeNode(QualType Ty, llvm::DIFile *Fg);
|
|
|
|
/// Create new member and increase Offset by FType's size.
|
|
llvm::DIType *CreateMemberType(llvm::DIFile *Unit, QualType FType,
|
|
StringRef Name, uint64_t *Offset);
|
|
|
|
/// Retrieve the DIDescriptor, if any, for the canonical form of this
|
|
/// declaration.
|
|
llvm::DINode *getDeclarationOrDefinition(const Decl *D);
|
|
|
|
/// \return debug info descriptor to describe method
|
|
/// declaration for the given method definition.
|
|
llvm::DISubprogram *getFunctionDeclaration(const Decl *D);
|
|
|
|
/// \return debug info descriptor to the describe method declaration
|
|
/// for the given method definition.
|
|
/// \param FnType For Objective-C methods, their type.
|
|
/// \param LineNo The declaration's line number.
|
|
/// \param Flags The DIFlags for the method declaration.
|
|
/// \param SPFlags The subprogram-spcific flags for the method declaration.
|
|
llvm::DISubprogram *
|
|
getObjCMethodDeclaration(const Decl *D, llvm::DISubroutineType *FnType,
|
|
unsigned LineNo, llvm::DINode::DIFlags Flags,
|
|
llvm::DISubprogram::DISPFlags SPFlags);
|
|
|
|
/// \return debug info descriptor to describe in-class static data
|
|
/// member declaration for the given out-of-class definition. If D
|
|
/// is an out-of-class definition of a static data member of a
|
|
/// class, find its corresponding in-class declaration.
|
|
llvm::DIDerivedType *
|
|
getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D);
|
|
|
|
/// Helper that either creates a forward declaration or a stub.
|
|
llvm::DISubprogram *getFunctionFwdDeclOrStub(GlobalDecl GD, bool Stub);
|
|
|
|
/// Create a subprogram describing the forward declaration
|
|
/// represented in the given FunctionDecl wrapped in a GlobalDecl.
|
|
llvm::DISubprogram *getFunctionForwardDeclaration(GlobalDecl GD);
|
|
|
|
/// Create a DISubprogram describing the function
|
|
/// represented in the given FunctionDecl wrapped in a GlobalDecl.
|
|
llvm::DISubprogram *getFunctionStub(GlobalDecl GD);
|
|
|
|
/// Create a global variable describing the forward declaration
|
|
/// represented in the given VarDecl.
|
|
llvm::DIGlobalVariable *
|
|
getGlobalVariableForwardDeclaration(const VarDecl *VD);
|
|
|
|
/// Return a global variable that represents one of the collection of global
|
|
/// variables created for an anonmyous union.
|
|
///
|
|
/// Recursively collect all of the member fields of a global
|
|
/// anonymous decl and create static variables for them. The first
|
|
/// time this is called it needs to be on a union and then from
|
|
/// there we can have additional unnamed fields.
|
|
llvm::DIGlobalVariableExpression *
|
|
CollectAnonRecordDecls(const RecordDecl *RD, llvm::DIFile *Unit,
|
|
unsigned LineNo, StringRef LinkageName,
|
|
llvm::GlobalVariable *Var, llvm::DIScope *DContext);
|
|
|
|
|
|
/// Return flags which enable debug info emission for call sites, provided
|
|
/// that it is supported and enabled.
|
|
llvm::DINode::DIFlags getCallSiteRelatedAttrs() const;
|
|
|
|
/// Get the printing policy for producing names for debug info.
|
|
PrintingPolicy getPrintingPolicy() const;
|
|
|
|
/// Get function name for the given FunctionDecl. If the name is
|
|
/// constructed on demand (e.g., C++ destructor) then the name is
|
|
/// stored on the side.
|
|
StringRef getFunctionName(const FunctionDecl *FD);
|
|
|
|
/// Returns the unmangled name of an Objective-C method.
|
|
/// This is the display name for the debugging info.
|
|
StringRef getObjCMethodName(const ObjCMethodDecl *FD);
|
|
|
|
/// Return selector name. This is used for debugging
|
|
/// info.
|
|
StringRef getSelectorName(Selector S);
|
|
|
|
/// Get class name including template argument list.
|
|
StringRef getClassName(const RecordDecl *RD);
|
|
|
|
/// Get the vtable name for the given class.
|
|
StringRef getVTableName(const CXXRecordDecl *Decl);
|
|
|
|
/// Get the name to use in the debug info for a dynamic initializer or atexit
|
|
/// stub function.
|
|
StringRef getDynamicInitializerName(const VarDecl *VD,
|
|
DynamicInitKind StubKind,
|
|
llvm::Function *InitFn);
|
|
|
|
/// Get line number for the location. If location is invalid
|
|
/// then use current location.
|
|
unsigned getLineNumber(SourceLocation Loc);
|
|
|
|
/// Get column number for the location. If location is
|
|
/// invalid then use current location.
|
|
/// \param Force Assume DebugColumnInfo option is true.
|
|
unsigned getColumnNumber(SourceLocation Loc, bool Force = false);
|
|
|
|
/// Collect various properties of a FunctionDecl.
|
|
/// \param GD A GlobalDecl whose getDecl() must return a FunctionDecl.
|
|
void collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
|
|
StringRef &Name, StringRef &LinkageName,
|
|
llvm::DIScope *&FDContext,
|
|
llvm::DINodeArray &TParamsArray,
|
|
llvm::DINode::DIFlags &Flags);
|
|
|
|
/// Collect various properties of a VarDecl.
|
|
void collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
|
|
unsigned &LineNo, QualType &T, StringRef &Name,
|
|
StringRef &LinkageName,
|
|
llvm::MDTuple *&TemplateParameters,
|
|
llvm::DIScope *&VDContext);
|
|
|
|
/// Allocate a copy of \p A using the DebugInfoNames allocator
|
|
/// and return a reference to it. If multiple arguments are given the strings
|
|
/// are concatenated.
|
|
StringRef internString(StringRef A, StringRef B = StringRef()) {
|
|
char *Data = DebugInfoNames.Allocate<char>(A.size() + B.size());
|
|
if (!A.empty())
|
|
std::memcpy(Data, A.data(), A.size());
|
|
if (!B.empty())
|
|
std::memcpy(Data + A.size(), B.data(), B.size());
|
|
return StringRef(Data, A.size() + B.size());
|
|
}
|
|
};
|
|
|
|
/// A scoped helper to set the current debug location to the specified
|
|
/// location or preferred location of the specified Expr.
|
|
class ApplyDebugLocation {
|
|
private:
|
|
void init(SourceLocation TemporaryLocation, bool DefaultToEmpty = false);
|
|
ApplyDebugLocation(CodeGenFunction &CGF, bool DefaultToEmpty,
|
|
SourceLocation TemporaryLocation);
|
|
|
|
llvm::DebugLoc OriginalLocation;
|
|
CodeGenFunction *CGF;
|
|
|
|
public:
|
|
/// Set the location to the (valid) TemporaryLocation.
|
|
ApplyDebugLocation(CodeGenFunction &CGF, SourceLocation TemporaryLocation);
|
|
ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E);
|
|
ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc);
|
|
ApplyDebugLocation(ApplyDebugLocation &&Other) : CGF(Other.CGF) {
|
|
Other.CGF = nullptr;
|
|
}
|
|
ApplyDebugLocation &operator=(ApplyDebugLocation &&) = default;
|
|
|
|
~ApplyDebugLocation();
|
|
|
|
/// Apply TemporaryLocation if it is valid. Otherwise switch
|
|
/// to an artificial debug location that has a valid scope, but no
|
|
/// line information.
|
|
///
|
|
/// Artificial locations are useful when emitting compiler-generated
|
|
/// helper functions that have no source location associated with
|
|
/// them. The DWARF specification allows the compiler to use the
|
|
/// special line number 0 to indicate code that can not be
|
|
/// attributed to any source location. Note that passing an empty
|
|
/// SourceLocation to CGDebugInfo::setLocation() will result in the
|
|
/// last valid location being reused.
|
|
static ApplyDebugLocation CreateArtificial(CodeGenFunction &CGF) {
|
|
return ApplyDebugLocation(CGF, false, SourceLocation());
|
|
}
|
|
/// Apply TemporaryLocation if it is valid. Otherwise switch
|
|
/// to an artificial debug location that has a valid scope, but no
|
|
/// line information.
|
|
static ApplyDebugLocation
|
|
CreateDefaultArtificial(CodeGenFunction &CGF,
|
|
SourceLocation TemporaryLocation) {
|
|
return ApplyDebugLocation(CGF, false, TemporaryLocation);
|
|
}
|
|
|
|
/// Set the IRBuilder to not attach debug locations. Note that
|
|
/// passing an empty SourceLocation to \a CGDebugInfo::setLocation()
|
|
/// will result in the last valid location being reused. Note that
|
|
/// all instructions that do not have a location at the beginning of
|
|
/// a function are counted towards to function prologue.
|
|
static ApplyDebugLocation CreateEmpty(CodeGenFunction &CGF) {
|
|
return ApplyDebugLocation(CGF, true, SourceLocation());
|
|
}
|
|
};
|
|
|
|
/// A scoped helper to set the current debug location to an inlined location.
|
|
class ApplyInlineDebugLocation {
|
|
SourceLocation SavedLocation;
|
|
CodeGenFunction *CGF;
|
|
|
|
public:
|
|
/// Set up the CodeGenFunction's DebugInfo to produce inline locations for the
|
|
/// function \p InlinedFn. The current debug location becomes the inlined call
|
|
/// site of the inlined function.
|
|
ApplyInlineDebugLocation(CodeGenFunction &CGF, GlobalDecl InlinedFn);
|
|
/// Restore everything back to the original state.
|
|
~ApplyInlineDebugLocation();
|
|
};
|
|
|
|
} // namespace CodeGen
|
|
} // namespace clang
|
|
|
|
#endif // LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
|