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