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Diffstat (limited to 'lib/Analysis/DIBuilder.cpp')
| -rw-r--r-- | lib/Analysis/DIBuilder.cpp | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/lib/Analysis/DIBuilder.cpp b/lib/Analysis/DIBuilder.cpp new file mode 100644 index 0000000..1b2049b --- /dev/null +++ b/lib/Analysis/DIBuilder.cpp @@ -0,0 +1,260 @@ +//===--- DIBuilder.cpp - Debug Information Builder ------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements the DIBuilder. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Analysis/DIBuilder.h" +#include "llvm/Analysis/DebugInfo.h" +#include "llvm/Constants.h" +#include "llvm/IntrinsicInst.h" +#include "llvm/Module.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/Support/Dwarf.h" + +using namespace llvm; +using namespace llvm::dwarf; + +static Constant *GetTagConstant(LLVMContext &VMContext, unsigned Tag) { + assert((Tag & LLVMDebugVersionMask) == 0 && + "Tag too large for debug encoding!"); + return ConstantInt::get(Type::getInt32Ty(VMContext), Tag | LLVMDebugVersion); +} +DIBuilder::DIBuilder(Module &m) + : M(m), VMContext(M.getContext()), TheCU(0) {} + +/// CreateCompileUnit - A CompileUnit provides an anchor for all debugging +/// information generated during this instance of compilation. +void DIBuilder::CreateCompileUnit(unsigned Lang, StringRef Filename, + StringRef Directory, StringRef Producer, + bool isOptimized, StringRef Flags, + unsigned RunTimeVer) { + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_compile_unit), + llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)), + ConstantInt::get(Type::getInt32Ty(VMContext), Lang), + MDString::get(VMContext, Filename), + MDString::get(VMContext, Directory), + MDString::get(VMContext, Producer), + // Deprecate isMain field. + ConstantInt::get(Type::getInt1Ty(VMContext), true), // isMain + ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized), + MDString::get(VMContext, Flags), + ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeVer) + }; + TheCU = DICompileUnit(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateFile - Create a file descriptor to hold debugging information +/// for a file. +DIFile DIBuilder::CreateFile(StringRef Filename, StringRef Directory) { + assert(TheCU && "Unable to create DW_TAG_file_type without CompileUnit"); + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_file_type), + MDString::get(VMContext, Filename), + MDString::get(VMContext, Directory), + TheCU + }; + return DIFile(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateEnumerator - Create a single enumerator value. +DIEnumerator DIBuilder::CreateEnumerator(StringRef Name, uint64_t Val) { + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_enumerator), + MDString::get(VMContext, Name), + ConstantInt::get(Type::getInt64Ty(VMContext), Val) + }; + return DIEnumerator(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateBasicType - Create debugging information entry for a basic +/// type, e.g 'char'. +DIType DIBuilder::CreateBasicType(StringRef Name, uint64_t SizeInBits, + uint64_t AlignInBits, + unsigned Encoding) { + // Basic types are encoded in DIBasicType format. Line number, filename, + // offset and flags are always empty here. + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_base_type), + TheCU, + MDString::get(VMContext, Name), + NULL, // Filename + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line + ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits), + ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits), + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags; + ConstantInt::get(Type::getInt32Ty(VMContext), Encoding) + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateQaulifiedType - Create debugging information entry for a qualified +/// type, e.g. 'const int'. +DIType DIBuilder::CreateQualifiedType(unsigned Tag, DIType FromTy) { + // Qualified types are encoded in DIDerivedType format. + Value *Elts[] = { + GetTagConstant(VMContext, Tag), + TheCU, + MDString::get(VMContext, StringRef()), // Empty name. + NULL, // Filename + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Size + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Align + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags + FromTy + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreatePointerType - Create debugging information entry for a pointer. +DIType DIBuilder::CreatePointerType(DIType PointeeTy, uint64_t SizeInBits, + uint64_t AlignInBits, StringRef Name) { + // Pointer types are encoded in DIDerivedType format. + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_pointer_type), + TheCU, + MDString::get(VMContext, Name), + NULL, // Filename + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line + ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits), + ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits), + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags + PointeeTy + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateReferenceType - Create debugging information entry for a reference. +DIType DIBuilder::CreateReferenceType(DIType RTy) { + // References are encoded in DIDerivedType format. + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_reference_type), + TheCU, + NULL, // Name + NULL, // Filename + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Size + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Align + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags + RTy + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateTypedef - Create debugging information entry for a typedef. +DIType DIBuilder::CreateTypedef(DIType Ty, StringRef Name, DIFile File, + unsigned LineNo) { + // typedefs are encoded in DIDerivedType format. + assert(Ty.Verify() && "Invalid typedef type!"); + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_typedef), + Ty.getContext(), + MDString::get(VMContext, Name), + File, + ConstantInt::get(Type::getInt32Ty(VMContext), LineNo), + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Size + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Align + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags + Ty + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateFriend - Create debugging information entry for a 'friend'. +DIType DIBuilder::CreateFriend(DIType Ty, DIType FriendTy) { + // typedefs are encoded in DIDerivedType format. + assert(Ty.Verify() && "Invalid type!"); + assert(FriendTy.Verify() && "Invalid friend type!"); + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_friend), + Ty, + NULL, // Name + Ty.getFile(), + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Size + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Align + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags + FriendTy + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateInheritance - Create debugging information entry to establish +/// inheritnace relationship between two types. +DIType DIBuilder::CreateInheritance(DIType Ty, DIType BaseTy, + uint64_t BaseOffset, unsigned Flags) { + // TAG_inheritance is encoded in DIDerivedType format. + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_inheritance), + Ty, + NULL, // Name + NULL, // File + ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Size + ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Align + ConstantInt::get(Type::getInt64Ty(VMContext), BaseOffset), + ConstantInt::get(Type::getInt32Ty(VMContext), Flags), + BaseTy + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateMemberType - Create debugging information entry for a member. +DIType DIBuilder::CreateMemberType(DIDescriptor Context, StringRef Name, + DIFile F, unsigned LineNumber, + uint64_t SizeInBits, uint64_t AlignInBits, + uint64_t OffsetInBits, unsigned Flags, + DIType Ty) { + // TAG_member is encoded in DIDerivedType format. + Value *Elts[] = { + GetTagConstant(VMContext, dwarf::DW_TAG_member), + Context, + MDString::get(VMContext, Name), + F, + ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber), + ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits), + ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits), + ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits), + ConstantInt::get(Type::getInt32Ty(VMContext), Flags), + Ty + }; + return DIType(MDNode::get(VMContext, &Elts[0], array_lengthof(Elts))); +} + +/// CreateArtificialType - Create a new DIType with "artificial" flag set. +DIType DIBuilder::CreateArtificialType(DIType Ty) { + if (Ty.isArtificial()) + return Ty; + + SmallVector<Value *, 9> Elts; + MDNode *N = Ty; + assert (N && "Unexpected input DIType!"); + for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { + if (Value *V = N->getOperand(i)) + Elts.push_back(V); + else + Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))); + } + + unsigned CurFlags = Ty.getFlags(); + CurFlags = CurFlags | DIType::FlagArtificial; + + // Flags are stored at this slot. + Elts[8] = ConstantInt::get(Type::getInt32Ty(VMContext), CurFlags); + + return DIType(MDNode::get(VMContext, Elts.data(), Elts.size())); +} |