//===--- DIBuilder.cpp - Debug Information Builder ------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file implements the DIBuilder. // //===----------------------------------------------------------------------===// #include "llvm/IR/DIBuilder.h" #include "LLVMContextImpl.h" #include "llvm/ADT/Optional.h" #include "llvm/ADT/STLExtras.h" #include "llvm/BinaryFormat/Dwarf.h" #include "llvm/IR/Constants.h" #include "llvm/IR/DebugInfo.h" #include "llvm/IR/IRBuilder.h" #include "llvm/IR/IntrinsicInst.h" #include "llvm/IR/Module.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" using namespace llvm; using namespace llvm::dwarf; static cl::opt UseDbgAddr("use-dbg-addr", llvm::cl::desc("Use llvm.dbg.addr for all local variables"), cl::init(false), cl::Hidden); DIBuilder::DIBuilder(Module &m, bool AllowUnresolvedNodes, DICompileUnit *CU) : M(m), VMContext(M.getContext()), CUNode(CU), DeclareFn(nullptr), ValueFn(nullptr), LabelFn(nullptr), AllowUnresolvedNodes(AllowUnresolvedNodes) {} void DIBuilder::trackIfUnresolved(MDNode *N) { if (!N) return; if (N->isResolved()) return; assert(AllowUnresolvedNodes && "Cannot handle unresolved nodes"); UnresolvedNodes.emplace_back(N); } void DIBuilder::finalizeSubprogram(DISubprogram *SP) { MDTuple *Temp = SP->getRetainedNodes().get(); if (!Temp || !Temp->isTemporary()) return; SmallVector RetainedNodes; auto PV = PreservedVariables.find(SP); if (PV != PreservedVariables.end()) RetainedNodes.append(PV->second.begin(), PV->second.end()); auto PL = PreservedLabels.find(SP); if (PL != PreservedLabels.end()) RetainedNodes.append(PL->second.begin(), PL->second.end()); DINodeArray Node = getOrCreateArray(RetainedNodes); TempMDTuple(Temp)->replaceAllUsesWith(Node.get()); } void DIBuilder::finalize() { if (!CUNode) { assert(!AllowUnresolvedNodes && "creating type nodes without a CU is not supported"); return; } CUNode->replaceEnumTypes(MDTuple::get(VMContext, AllEnumTypes)); SmallVector RetainValues; // Declarations and definitions of the same type may be retained. Some // clients RAUW these pairs, leaving duplicates in the retained types // list. Use a set to remove the duplicates while we transform the // TrackingVHs back into Values. SmallPtrSet RetainSet; for (unsigned I = 0, E = AllRetainTypes.size(); I < E; I++) if (RetainSet.insert(AllRetainTypes[I]).second) RetainValues.push_back(AllRetainTypes[I]); if (!RetainValues.empty()) CUNode->replaceRetainedTypes(MDTuple::get(VMContext, RetainValues)); DISubprogramArray SPs = MDTuple::get(VMContext, AllSubprograms); for (auto *SP : SPs) finalizeSubprogram(SP); for (auto *N : RetainValues) if (auto *SP = dyn_cast(N)) finalizeSubprogram(SP); if (!AllGVs.empty()) CUNode->replaceGlobalVariables(MDTuple::get(VMContext, AllGVs)); if (!AllImportedModules.empty()) CUNode->replaceImportedEntities(MDTuple::get( VMContext, SmallVector(AllImportedModules.begin(), AllImportedModules.end()))); for (const auto &I : AllMacrosPerParent) { // DIMacroNode's with nullptr parent are DICompileUnit direct children. if (!I.first) { CUNode->replaceMacros(MDTuple::get(VMContext, I.second.getArrayRef())); continue; } // Otherwise, it must be a temporary DIMacroFile that need to be resolved. auto *TMF = cast(I.first); auto *MF = DIMacroFile::get(VMContext, dwarf::DW_MACINFO_start_file, TMF->getLine(), TMF->getFile(), getOrCreateMacroArray(I.second.getArrayRef())); replaceTemporary(llvm::TempDIMacroNode(TMF), MF); } // Now that all temp nodes have been replaced or deleted, resolve remaining // cycles. for (const auto &N : UnresolvedNodes) if (N && !N->isResolved()) N->resolveCycles(); UnresolvedNodes.clear(); // Can't handle unresolved nodes anymore. AllowUnresolvedNodes = false; } /// If N is compile unit return NULL otherwise return N. static DIScope *getNonCompileUnitScope(DIScope *N) { if (!N || isa(N)) return nullptr; return cast(N); } DICompileUnit *DIBuilder::createCompileUnit( unsigned Lang, DIFile *File, StringRef Producer, bool isOptimized, StringRef Flags, unsigned RunTimeVer, StringRef SplitName, DICompileUnit::DebugEmissionKind Kind, uint64_t DWOId, bool SplitDebugInlining, bool DebugInfoForProfiling, DICompileUnit::DebugNameTableKind NameTableKind, bool RangesBaseAddress, StringRef SysRoot, StringRef SDK) { assert(((Lang <= dwarf::DW_LANG_Fortran08 && Lang >= dwarf::DW_LANG_C89) || (Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) && "Invalid Language tag"); assert(!CUNode && "Can only make one compile unit per DIBuilder instance"); CUNode = DICompileUnit::getDistinct( VMContext, Lang, File, Producer, isOptimized, Flags, RunTimeVer, SplitName, Kind, nullptr, nullptr, nullptr, nullptr, nullptr, DWOId, SplitDebugInlining, DebugInfoForProfiling, NameTableKind, RangesBaseAddress, SysRoot, SDK); // Create a named metadata so that it is easier to find cu in a module. NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu"); NMD->addOperand(CUNode); trackIfUnresolved(CUNode); return CUNode; } static DIImportedEntity * createImportedModule(LLVMContext &C, dwarf::Tag Tag, DIScope *Context, Metadata *NS, DIFile *File, unsigned Line, StringRef Name, SmallVectorImpl &AllImportedModules) { if (Line) assert(File && "Source location has line number but no file"); unsigned EntitiesCount = C.pImpl->DIImportedEntitys.size(); auto *M = DIImportedEntity::get(C, Tag, Context, cast_or_null(NS), File, Line, Name); if (EntitiesCount < C.pImpl->DIImportedEntitys.size()) // A new Imported Entity was just added to the context. // Add it to the Imported Modules list. AllImportedModules.emplace_back(M); return M; } DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, DINamespace *NS, DIFile *File, unsigned Line) { return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module, Context, NS, File, Line, StringRef(), AllImportedModules); } DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, DIImportedEntity *NS, DIFile *File, unsigned Line) { return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module, Context, NS, File, Line, StringRef(), AllImportedModules); } DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, DIModule *M, DIFile *File, unsigned Line) { return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module, Context, M, File, Line, StringRef(), AllImportedModules); } DIImportedEntity *DIBuilder::createImportedDeclaration(DIScope *Context, DINode *Decl, DIFile *File, unsigned Line, StringRef Name) { // Make sure to use the unique identifier based metadata reference for // types that have one. return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_declaration, Context, Decl, File, Line, Name, AllImportedModules); } DIFile *DIBuilder::createFile(StringRef Filename, StringRef Directory, Optional> CS, Optional Source) { return DIFile::get(VMContext, Filename, Directory, CS, Source); } DIMacro *DIBuilder::createMacro(DIMacroFile *Parent, unsigned LineNumber, unsigned MacroType, StringRef Name, StringRef Value) { assert(!Name.empty() && "Unable to create macro without name"); assert((MacroType == dwarf::DW_MACINFO_undef || MacroType == dwarf::DW_MACINFO_define) && "Unexpected macro type"); auto *M = DIMacro::get(VMContext, MacroType, LineNumber, Name, Value); AllMacrosPerParent[Parent].insert(M); return M; } DIMacroFile *DIBuilder::createTempMacroFile(DIMacroFile *Parent, unsigned LineNumber, DIFile *File) { auto *MF = DIMacroFile::getTemporary(VMContext, dwarf::DW_MACINFO_start_file, LineNumber, File, DIMacroNodeArray()) .release(); AllMacrosPerParent[Parent].insert(MF); // Add the new temporary DIMacroFile to the macro per parent map as a parent. // This is needed to assure DIMacroFile with no children to have an entry in // the map. Otherwise, it will not be resolved in DIBuilder::finalize(). AllMacrosPerParent.insert({MF, {}}); return MF; } DIEnumerator *DIBuilder::createEnumerator(StringRef Name, int64_t Val, bool IsUnsigned) { assert(!Name.empty() && "Unable to create enumerator without name"); return DIEnumerator::get(VMContext, APInt(64, Val, !IsUnsigned), IsUnsigned, Name); } DIBasicType *DIBuilder::createUnspecifiedType(StringRef Name) { assert(!Name.empty() && "Unable to create type without name"); return DIBasicType::get(VMContext, dwarf::DW_TAG_unspecified_type, Name); } DIBasicType *DIBuilder::createNullPtrType() { return createUnspecifiedType("decltype(nullptr)"); } DIBasicType *DIBuilder::createBasicType(StringRef Name, uint64_t SizeInBits, unsigned Encoding, DINode::DIFlags Flags) { assert(!Name.empty() && "Unable to create type without name"); return DIBasicType::get(VMContext, dwarf::DW_TAG_base_type, Name, SizeInBits, 0, Encoding, Flags); } DIDerivedType *DIBuilder::createQualifiedType(unsigned Tag, DIType *FromTy) { return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, FromTy, 0, 0, 0, None, DINode::FlagZero); } DIDerivedType *DIBuilder::createPointerType( DIType *PointeeTy, uint64_t SizeInBits, uint32_t AlignInBits, Optional DWARFAddressSpace, StringRef Name) { // FIXME: Why is there a name here? return DIDerivedType::get(VMContext, dwarf::DW_TAG_pointer_type, Name, nullptr, 0, nullptr, PointeeTy, SizeInBits, AlignInBits, 0, DWARFAddressSpace, DINode::FlagZero); } DIDerivedType *DIBuilder::createMemberPointerType(DIType *PointeeTy, DIType *Base, uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags) { return DIDerivedType::get(VMContext, dwarf::DW_TAG_ptr_to_member_type, "", nullptr, 0, nullptr, PointeeTy, SizeInBits, AlignInBits, 0, None, Flags, Base); } DIDerivedType *DIBuilder::createReferenceType( unsigned Tag, DIType *RTy, uint64_t SizeInBits, uint32_t AlignInBits, Optional DWARFAddressSpace) { assert(RTy && "Unable to create reference type"); return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, RTy, SizeInBits, AlignInBits, 0, DWARFAddressSpace, DINode::FlagZero); } DIDerivedType *DIBuilder::createTypedef(DIType *Ty, StringRef Name, DIFile *File, unsigned LineNo, DIScope *Context, uint32_t AlignInBits) { return DIDerivedType::get(VMContext, dwarf::DW_TAG_typedef, Name, File, LineNo, getNonCompileUnitScope(Context), Ty, 0, AlignInBits, 0, None, DINode::FlagZero); } DIDerivedType *DIBuilder::createFriend(DIType *Ty, DIType *FriendTy) { assert(Ty && "Invalid type!"); assert(FriendTy && "Invalid friend type!"); return DIDerivedType::get(VMContext, dwarf::DW_TAG_friend, "", nullptr, 0, Ty, FriendTy, 0, 0, 0, None, DINode::FlagZero); } DIDerivedType *DIBuilder::createInheritance(DIType *Ty, DIType *BaseTy, uint64_t BaseOffset, uint32_t VBPtrOffset, DINode::DIFlags Flags) { assert(Ty && "Unable to create inheritance"); Metadata *ExtraData = ConstantAsMetadata::get( ConstantInt::get(IntegerType::get(VMContext, 32), VBPtrOffset)); return DIDerivedType::get(VMContext, dwarf::DW_TAG_inheritance, "", nullptr, 0, Ty, BaseTy, 0, 0, BaseOffset, None, Flags, ExtraData); } DIDerivedType *DIBuilder::createMemberType(DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, DINode::DIFlags Flags, DIType *Ty) { return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, LineNumber, getNonCompileUnitScope(Scope), Ty, SizeInBits, AlignInBits, OffsetInBits, None, Flags); } static ConstantAsMetadata *getConstantOrNull(Constant *C) { if (C) return ConstantAsMetadata::get(C); return nullptr; } DIDerivedType *DIBuilder::createVariantMemberType( DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, Constant *Discriminant, DINode::DIFlags Flags, DIType *Ty) { return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, LineNumber, getNonCompileUnitScope(Scope), Ty, SizeInBits, AlignInBits, OffsetInBits, None, Flags, getConstantOrNull(Discriminant)); } DIDerivedType *DIBuilder::createBitFieldMemberType( DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint64_t OffsetInBits, uint64_t StorageOffsetInBits, DINode::DIFlags Flags, DIType *Ty) { Flags |= DINode::FlagBitField; return DIDerivedType::get( VMContext, dwarf::DW_TAG_member, Name, File, LineNumber, getNonCompileUnitScope(Scope), Ty, SizeInBits, /* AlignInBits */ 0, OffsetInBits, None, Flags, ConstantAsMetadata::get(ConstantInt::get(IntegerType::get(VMContext, 64), StorageOffsetInBits))); } DIDerivedType * DIBuilder::createStaticMemberType(DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, DIType *Ty, DINode::DIFlags Flags, llvm::Constant *Val, uint32_t AlignInBits) { Flags |= DINode::FlagStaticMember; return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, LineNumber, getNonCompileUnitScope(Scope), Ty, 0, AlignInBits, 0, None, Flags, getConstantOrNull(Val)); } DIDerivedType * DIBuilder::createObjCIVar(StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, DINode::DIFlags Flags, DIType *Ty, MDNode *PropertyNode) { return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, LineNumber, getNonCompileUnitScope(File), Ty, SizeInBits, AlignInBits, OffsetInBits, None, Flags, PropertyNode); } DIObjCProperty * DIBuilder::createObjCProperty(StringRef Name, DIFile *File, unsigned LineNumber, StringRef GetterName, StringRef SetterName, unsigned PropertyAttributes, DIType *Ty) { return DIObjCProperty::get(VMContext, Name, File, LineNumber, GetterName, SetterName, PropertyAttributes, Ty); } DITemplateTypeParameter * DIBuilder::createTemplateTypeParameter(DIScope *Context, StringRef Name, DIType *Ty, bool isDefault) { assert((!Context || isa(Context)) && "Expected compile unit"); return DITemplateTypeParameter::get(VMContext, Name, Ty, isDefault); } static DITemplateValueParameter * createTemplateValueParameterHelper(LLVMContext &VMContext, unsigned Tag, DIScope *Context, StringRef Name, DIType *Ty, bool IsDefault, Metadata *MD) { assert((!Context || isa(Context)) && "Expected compile unit"); return DITemplateValueParameter::get(VMContext, Tag, Name, Ty, IsDefault, MD); } DITemplateValueParameter * DIBuilder::createTemplateValueParameter(DIScope *Context, StringRef Name, DIType *Ty, bool isDefault, Constant *Val) { return createTemplateValueParameterHelper( VMContext, dwarf::DW_TAG_template_value_parameter, Context, Name, Ty, isDefault, getConstantOrNull(Val)); } DITemplateValueParameter * DIBuilder::createTemplateTemplateParameter(DIScope *Context, StringRef Name, DIType *Ty, StringRef Val) { return createTemplateValueParameterHelper( VMContext, dwarf::DW_TAG_GNU_template_template_param, Context, Name, Ty, false, MDString::get(VMContext, Val)); } DITemplateValueParameter * DIBuilder::createTemplateParameterPack(DIScope *Context, StringRef Name, DIType *Ty, DINodeArray Val) { return createTemplateValueParameterHelper( VMContext, dwarf::DW_TAG_GNU_template_parameter_pack, Context, Name, Ty, false, Val.get()); } DICompositeType *DIBuilder::createClassType( DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, DINode::DIFlags Flags, DIType *DerivedFrom, DINodeArray Elements, DIType *VTableHolder, MDNode *TemplateParams, StringRef UniqueIdentifier) { assert((!Context || isa(Context)) && "createClassType should be called with a valid Context"); auto *R = DICompositeType::get( VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber, getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits, OffsetInBits, Flags, Elements, 0, VTableHolder, cast_or_null(TemplateParams), UniqueIdentifier); trackIfUnresolved(R); return R; } DICompositeType *DIBuilder::createStructType( DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, DIType *DerivedFrom, DINodeArray Elements, unsigned RunTimeLang, DIType *VTableHolder, StringRef UniqueIdentifier) { auto *R = DICompositeType::get( VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber, getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits, 0, Flags, Elements, RunTimeLang, VTableHolder, nullptr, UniqueIdentifier); trackIfUnresolved(R); return R; } DICompositeType *DIBuilder::createUnionType( DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, DINodeArray Elements, unsigned RunTimeLang, StringRef UniqueIdentifier) { auto *R = DICompositeType::get( VMContext, dwarf::DW_TAG_union_type, Name, File, LineNumber, getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags, Elements, RunTimeLang, nullptr, nullptr, UniqueIdentifier); trackIfUnresolved(R); return R; } DICompositeType *DIBuilder::createVariantPart( DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, DIDerivedType *Discriminator, DINodeArray Elements, StringRef UniqueIdentifier) { auto *R = DICompositeType::get( VMContext, dwarf::DW_TAG_variant_part, Name, File, LineNumber, getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags, Elements, 0, nullptr, nullptr, UniqueIdentifier, Discriminator); trackIfUnresolved(R); return R; } DISubroutineType *DIBuilder::createSubroutineType(DITypeRefArray ParameterTypes, DINode::DIFlags Flags, unsigned CC) { return DISubroutineType::get(VMContext, Flags, CC, ParameterTypes); } DICompositeType *DIBuilder::createEnumerationType( DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, uint64_t SizeInBits, uint32_t AlignInBits, DINodeArray Elements, DIType *UnderlyingType, StringRef UniqueIdentifier, bool IsScoped) { auto *CTy = DICompositeType::get( VMContext, dwarf::DW_TAG_enumeration_type, Name, File, LineNumber, getNonCompileUnitScope(Scope), UnderlyingType, SizeInBits, AlignInBits, 0, IsScoped ? DINode::FlagEnumClass : DINode::FlagZero, Elements, 0, nullptr, nullptr, UniqueIdentifier); AllEnumTypes.push_back(CTy); trackIfUnresolved(CTy); return CTy; } DICompositeType *DIBuilder::createArrayType(uint64_t Size, uint32_t AlignInBits, DIType *Ty, DINodeArray Subscripts) { auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "", nullptr, 0, nullptr, Ty, Size, AlignInBits, 0, DINode::FlagZero, Subscripts, 0, nullptr); trackIfUnresolved(R); return R; } DICompositeType *DIBuilder::createVectorType(uint64_t Size, uint32_t AlignInBits, DIType *Ty, DINodeArray Subscripts) { auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "", nullptr, 0, nullptr, Ty, Size, AlignInBits, 0, DINode::FlagVector, Subscripts, 0, nullptr); trackIfUnresolved(R); return R; } DISubprogram *DIBuilder::createArtificialSubprogram(DISubprogram *SP) { auto NewSP = SP->cloneWithFlags(SP->getFlags() | DINode::FlagArtificial); return MDNode::replaceWithDistinct(std::move(NewSP)); } static DIType *createTypeWithFlags(const DIType *Ty, DINode::DIFlags FlagsToSet) { auto NewTy = Ty->cloneWithFlags(Ty->getFlags() | FlagsToSet); return MDNode::replaceWithUniqued(std::move(NewTy)); } DIType *DIBuilder::createArtificialType(DIType *Ty) { // FIXME: Restrict this to the nodes where it's valid. if (Ty->isArtificial()) return Ty; return createTypeWithFlags(Ty, DINode::FlagArtificial); } DIType *DIBuilder::createObjectPointerType(DIType *Ty) { // FIXME: Restrict this to the nodes where it's valid. if (Ty->isObjectPointer()) return Ty; DINode::DIFlags Flags = DINode::FlagObjectPointer | DINode::FlagArtificial; return createTypeWithFlags(Ty, Flags); } void DIBuilder::retainType(DIScope *T) { assert(T && "Expected non-null type"); assert((isa(T) || (isa(T) && cast(T)->isDefinition() == false)) && "Expected type or subprogram declaration"); AllRetainTypes.emplace_back(T); } DIBasicType *DIBuilder::createUnspecifiedParameter() { return nullptr; } DICompositeType * DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIScope *Scope, DIFile *F, unsigned Line, unsigned RuntimeLang, uint64_t SizeInBits, uint32_t AlignInBits, StringRef UniqueIdentifier) { // FIXME: Define in terms of createReplaceableForwardDecl() by calling // replaceWithUniqued(). auto *RetTy = DICompositeType::get( VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, DINode::FlagFwdDecl, nullptr, RuntimeLang, nullptr, nullptr, UniqueIdentifier); trackIfUnresolved(RetTy); return RetTy; } DICompositeType *DIBuilder::createReplaceableCompositeType( unsigned Tag, StringRef Name, DIScope *Scope, DIFile *F, unsigned Line, unsigned RuntimeLang, uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, StringRef UniqueIdentifier) { auto *RetTy = DICompositeType::getTemporary( VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags, nullptr, RuntimeLang, nullptr, nullptr, UniqueIdentifier) .release(); trackIfUnresolved(RetTy); return RetTy; } DINodeArray DIBuilder::getOrCreateArray(ArrayRef Elements) { return MDTuple::get(VMContext, Elements); } DIMacroNodeArray DIBuilder::getOrCreateMacroArray(ArrayRef Elements) { return MDTuple::get(VMContext, Elements); } DITypeRefArray DIBuilder::getOrCreateTypeArray(ArrayRef Elements) { SmallVector Elts; for (unsigned i = 0, e = Elements.size(); i != e; ++i) { if (Elements[i] && isa(Elements[i])) Elts.push_back(cast(Elements[i])); else Elts.push_back(Elements[i]); } return DITypeRefArray(MDNode::get(VMContext, Elts)); } DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Count) { return DISubrange::get(VMContext, Count, Lo); } DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, Metadata *CountNode) { return DISubrange::get(VMContext, CountNode, Lo); } static void checkGlobalVariableScope(DIScope *Context) { #ifndef NDEBUG if (auto *CT = dyn_cast_or_null(getNonCompileUnitScope(Context))) assert(CT->getIdentifier().empty() && "Context of a global variable should not be a type with identifier"); #endif } DIGlobalVariableExpression *DIBuilder::createGlobalVariableExpression( DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F, unsigned LineNumber, DIType *Ty, bool IsLocalToUnit, bool isDefined, DIExpression *Expr, MDNode *Decl, MDTuple *TemplateParams, uint32_t AlignInBits) { checkGlobalVariableScope(Context); auto *GV = DIGlobalVariable::getDistinct( VMContext, cast_or_null(Context), Name, LinkageName, F, LineNumber, Ty, IsLocalToUnit, isDefined, cast_or_null(Decl), TemplateParams, AlignInBits); if (!Expr) Expr = createExpression(); auto *N = DIGlobalVariableExpression::get(VMContext, GV, Expr); AllGVs.push_back(N); return N; } DIGlobalVariable *DIBuilder::createTempGlobalVariableFwdDecl( DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F, unsigned LineNumber, DIType *Ty, bool IsLocalToUnit, MDNode *Decl, MDTuple *TemplateParams, uint32_t AlignInBits) { checkGlobalVariableScope(Context); return DIGlobalVariable::getTemporary( VMContext, cast_or_null(Context), Name, LinkageName, F, LineNumber, Ty, IsLocalToUnit, false, cast_or_null(Decl), TemplateParams, AlignInBits) .release(); } static DILocalVariable *createLocalVariable( LLVMContext &VMContext, DenseMap> &PreservedVariables, DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File, unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags, uint32_t AlignInBits) { // FIXME: Why getNonCompileUnitScope()? // FIXME: Why is "!Context" okay here? // FIXME: Why doesn't this check for a subprogram or lexical block (AFAICT // the only valid scopes)? DIScope *Context = getNonCompileUnitScope(Scope); auto *Node = DILocalVariable::get(VMContext, cast_or_null(Context), Name, File, LineNo, Ty, ArgNo, Flags, AlignInBits); if (AlwaysPreserve) { // The optimizer may remove local variables. If there is an interest // to preserve variable info in such situation then stash it in a // named mdnode. DISubprogram *Fn = getDISubprogram(Scope); assert(Fn && "Missing subprogram for local variable"); PreservedVariables[Fn].emplace_back(Node); } return Node; } DILocalVariable *DIBuilder::createAutoVariable(DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags, uint32_t AlignInBits) { return createLocalVariable(VMContext, PreservedVariables, Scope, Name, /* ArgNo */ 0, File, LineNo, Ty, AlwaysPreserve, Flags, AlignInBits); } DILocalVariable *DIBuilder::createParameterVariable( DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File, unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags) { assert(ArgNo && "Expected non-zero argument number for parameter"); return createLocalVariable(VMContext, PreservedVariables, Scope, Name, ArgNo, File, LineNo, Ty, AlwaysPreserve, Flags, /* AlignInBits */0); } DILabel *DIBuilder::createLabel( DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNo, bool AlwaysPreserve) { DIScope *Context = getNonCompileUnitScope(Scope); auto *Node = DILabel::get(VMContext, cast_or_null(Context), Name, File, LineNo); if (AlwaysPreserve) { /// The optimizer may remove labels. If there is an interest /// to preserve label info in such situation then append it to /// the list of retained nodes of the DISubprogram. DISubprogram *Fn = getDISubprogram(Scope); assert(Fn && "Missing subprogram for label"); PreservedLabels[Fn].emplace_back(Node); } return Node; } DIExpression *DIBuilder::createExpression(ArrayRef Addr) { return DIExpression::get(VMContext, Addr); } DIExpression *DIBuilder::createExpression(ArrayRef Signed) { // TODO: Remove the callers of this signed version and delete. SmallVector Addr(Signed.begin(), Signed.end()); return createExpression(Addr); } template static DISubprogram *getSubprogram(bool IsDistinct, Ts &&... Args) { if (IsDistinct) return DISubprogram::getDistinct(std::forward(Args)...); return DISubprogram::get(std::forward(Args)...); } DISubprogram *DIBuilder::createFunction( DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File, unsigned LineNo, DISubroutineType *Ty, unsigned ScopeLine, DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags, DITemplateParameterArray TParams, DISubprogram *Decl, DITypeArray ThrownTypes) { bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition; auto *Node = getSubprogram( /*IsDistinct=*/IsDefinition, VMContext, getNonCompileUnitScope(Context), Name, LinkageName, File, LineNo, Ty, ScopeLine, nullptr, 0, 0, Flags, SPFlags, IsDefinition ? CUNode : nullptr, TParams, Decl, MDTuple::getTemporary(VMContext, None).release(), ThrownTypes); if (IsDefinition) AllSubprograms.push_back(Node); trackIfUnresolved(Node); return Node; } DISubprogram *DIBuilder::createTempFunctionFwdDecl( DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File, unsigned LineNo, DISubroutineType *Ty, unsigned ScopeLine, DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags, DITemplateParameterArray TParams, DISubprogram *Decl, DITypeArray ThrownTypes) { bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition; return DISubprogram::getTemporary(VMContext, getNonCompileUnitScope(Context), Name, LinkageName, File, LineNo, Ty, ScopeLine, nullptr, 0, 0, Flags, SPFlags, IsDefinition ? CUNode : nullptr, TParams, Decl, nullptr, ThrownTypes) .release(); } DISubprogram *DIBuilder::createMethod( DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F, unsigned LineNo, DISubroutineType *Ty, unsigned VIndex, int ThisAdjustment, DIType *VTableHolder, DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags, DITemplateParameterArray TParams, DITypeArray ThrownTypes) { assert(getNonCompileUnitScope(Context) && "Methods should have both a Context and a context that isn't " "the compile unit."); // FIXME: Do we want to use different scope/lines? bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition; auto *SP = getSubprogram( /*IsDistinct=*/IsDefinition, VMContext, cast(Context), Name, LinkageName, F, LineNo, Ty, LineNo, VTableHolder, VIndex, ThisAdjustment, Flags, SPFlags, IsDefinition ? CUNode : nullptr, TParams, nullptr, nullptr, ThrownTypes); if (IsDefinition) AllSubprograms.push_back(SP); trackIfUnresolved(SP); return SP; } DICommonBlock *DIBuilder::createCommonBlock( DIScope *Scope, DIGlobalVariable *Decl, StringRef Name, DIFile *File, unsigned LineNo) { return DICommonBlock::get( VMContext, Scope, Decl, Name, File, LineNo); } DINamespace *DIBuilder::createNameSpace(DIScope *Scope, StringRef Name, bool ExportSymbols) { // It is okay to *not* make anonymous top-level namespaces distinct, because // all nodes that have an anonymous namespace as their parent scope are // guaranteed to be unique and/or are linked to their containing // DICompileUnit. This decision is an explicit tradeoff of link time versus // memory usage versus code simplicity and may get revisited in the future. return DINamespace::get(VMContext, getNonCompileUnitScope(Scope), Name, ExportSymbols); } DIModule *DIBuilder::createModule(DIScope *Scope, StringRef Name, StringRef ConfigurationMacros, StringRef IncludePath, StringRef APINotesFile, DIFile *File, unsigned LineNo) { return DIModule::get(VMContext, File, getNonCompileUnitScope(Scope), Name, ConfigurationMacros, IncludePath, APINotesFile, LineNo); } DILexicalBlockFile *DIBuilder::createLexicalBlockFile(DIScope *Scope, DIFile *File, unsigned Discriminator) { return DILexicalBlockFile::get(VMContext, Scope, File, Discriminator); } DILexicalBlock *DIBuilder::createLexicalBlock(DIScope *Scope, DIFile *File, unsigned Line, unsigned Col) { // Make these distinct, to avoid merging two lexical blocks on the same // file/line/column. return DILexicalBlock::getDistinct(VMContext, getNonCompileUnitScope(Scope), File, Line, Col); } Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo, DIExpression *Expr, const DILocation *DL, Instruction *InsertBefore) { return insertDeclare(Storage, VarInfo, Expr, DL, InsertBefore->getParent(), InsertBefore); } Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo, DIExpression *Expr, const DILocation *DL, BasicBlock *InsertAtEnd) { // If this block already has a terminator then insert this intrinsic before // the terminator. Otherwise, put it at the end of the block. Instruction *InsertBefore = InsertAtEnd->getTerminator(); return insertDeclare(Storage, VarInfo, Expr, DL, InsertAtEnd, InsertBefore); } Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL, Instruction *InsertBefore) { return insertLabel( LabelInfo, DL, InsertBefore ? InsertBefore->getParent() : nullptr, InsertBefore); } Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL, BasicBlock *InsertAtEnd) { return insertLabel(LabelInfo, DL, InsertAtEnd, nullptr); } Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V, DILocalVariable *VarInfo, DIExpression *Expr, const DILocation *DL, Instruction *InsertBefore) { return insertDbgValueIntrinsic( V, VarInfo, Expr, DL, InsertBefore ? InsertBefore->getParent() : nullptr, InsertBefore); } Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V, DILocalVariable *VarInfo, DIExpression *Expr, const DILocation *DL, BasicBlock *InsertAtEnd) { return insertDbgValueIntrinsic(V, VarInfo, Expr, DL, InsertAtEnd, nullptr); } /// Initialize IRBuilder for inserting dbg.declare and dbg.value intrinsics. /// This abstracts over the various ways to specify an insert position. static void initIRBuilder(IRBuilder<> &Builder, const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) { if (InsertBefore) Builder.SetInsertPoint(InsertBefore); else if (InsertBB) Builder.SetInsertPoint(InsertBB); Builder.SetCurrentDebugLocation(DL); } static Value *getDbgIntrinsicValueImpl(LLVMContext &VMContext, Value *V) { assert(V && "no value passed to dbg intrinsic"); return MetadataAsValue::get(VMContext, ValueAsMetadata::get(V)); } static Function *getDeclareIntrin(Module &M) { return Intrinsic::getDeclaration(&M, UseDbgAddr ? Intrinsic::dbg_addr : Intrinsic::dbg_declare); } Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo, DIExpression *Expr, const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) { assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.declare"); assert(DL && "Expected debug loc"); assert(DL->getScope()->getSubprogram() == VarInfo->getScope()->getSubprogram() && "Expected matching subprograms"); if (!DeclareFn) DeclareFn = getDeclareIntrin(M); trackIfUnresolved(VarInfo); trackIfUnresolved(Expr); Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, Storage), MetadataAsValue::get(VMContext, VarInfo), MetadataAsValue::get(VMContext, Expr)}; IRBuilder<> B(DL->getContext()); initIRBuilder(B, DL, InsertBB, InsertBefore); return B.CreateCall(DeclareFn, Args); } Instruction *DIBuilder::insertDbgValueIntrinsic( Value *V, DILocalVariable *VarInfo, DIExpression *Expr, const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) { assert(V && "no value passed to dbg.value"); assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.value"); assert(DL && "Expected debug loc"); assert(DL->getScope()->getSubprogram() == VarInfo->getScope()->getSubprogram() && "Expected matching subprograms"); if (!ValueFn) ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value); trackIfUnresolved(VarInfo); trackIfUnresolved(Expr); Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, V), MetadataAsValue::get(VMContext, VarInfo), MetadataAsValue::get(VMContext, Expr)}; IRBuilder<> B(DL->getContext()); initIRBuilder(B, DL, InsertBB, InsertBefore); return B.CreateCall(ValueFn, Args); } Instruction *DIBuilder::insertLabel( DILabel *LabelInfo, const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) { assert(LabelInfo && "empty or invalid DILabel* passed to dbg.label"); assert(DL && "Expected debug loc"); assert(DL->getScope()->getSubprogram() == LabelInfo->getScope()->getSubprogram() && "Expected matching subprograms"); if (!LabelFn) LabelFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_label); trackIfUnresolved(LabelInfo); Value *Args[] = {MetadataAsValue::get(VMContext, LabelInfo)}; IRBuilder<> B(DL->getContext()); initIRBuilder(B, DL, InsertBB, InsertBefore); return B.CreateCall(LabelFn, Args); } void DIBuilder::replaceVTableHolder(DICompositeType *&T, DIType *VTableHolder) { { TypedTrackingMDRef N(T); N->replaceVTableHolder(VTableHolder); T = N.get(); } // If this didn't create a self-reference, just return. if (T != VTableHolder) return; // Look for unresolved operands. T will drop RAUW support, orphaning any // cycles underneath it. if (T->isResolved()) for (const MDOperand &O : T->operands()) if (auto *N = dyn_cast_or_null(O)) trackIfUnresolved(N); } void DIBuilder::replaceArrays(DICompositeType *&T, DINodeArray Elements, DINodeArray TParams) { { TypedTrackingMDRef N(T); if (Elements) N->replaceElements(Elements); if (TParams) N->replaceTemplateParams(DITemplateParameterArray(TParams)); T = N.get(); } // If T isn't resolved, there's no problem. if (!T->isResolved()) return; // If T is resolved, it may be due to a self-reference cycle. Track the // arrays explicitly if they're unresolved, or else the cycles will be // orphaned. if (Elements) trackIfUnresolved(Elements.get()); if (TParams) trackIfUnresolved(TParams.get()); }