#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Intrinsics.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Streams.h"
using namespace llvm;
using namespace llvm::dwarf;
bool DIDescriptor::ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel) {
if (!V)
return false;
GlobalVariable *GV = dyn_cast<GlobalVariable>(V->stripPointerCasts());
if (!GV)
return false;
if (!GV->hasInternalLinkage () && !GV->hasLinkOnceLinkage())
return false;
DIDescriptor DI(GV);
unsigned Version = DI.getVersion();
if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6)
return false;
unsigned Tag = DI.getTag();
switch (Tag) {
case DW_TAG_variable:
assert(DIVariable(GV).Verify() && "Invalid DebugInfo value");
break;
case DW_TAG_compile_unit:
assert(DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
break;
case DW_TAG_subprogram:
assert(DISubprogram(GV).Verify() && "Invalid DebugInfo value");
break;
case DW_TAG_lexical_block:
if (OptLevel != CodeGenOpt::None)
return false;
default:
break;
}
return true;
}
DIDescriptor::DIDescriptor(GlobalVariable *gv, unsigned RequiredTag) {
GV = gv;
if (GV && getTag() != RequiredTag)
GV = 0;
}
const std::string &
DIDescriptor::getStringField(unsigned Elt, std::string &Result) const {
if (GV == 0) {
Result.clear();
return Result;
}
Constant *C = GV->getInitializer();
if (C == 0 || Elt >= C->getNumOperands()) {
Result.clear();
return Result;
}
if (!GetConstantStringInfo(C->getOperand(Elt), Result))
Result.clear();
return Result;
}
uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
if (GV == 0) return 0;
Constant *C = GV->getInitializer();
if (C == 0 || Elt >= C->getNumOperands())
return 0;
if (ConstantInt *CI = dyn_cast<ConstantInt>(C->getOperand(Elt)))
return CI->getZExtValue();
return 0;
}
DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
if (GV == 0) return DIDescriptor();
Constant *C = GV->getInitializer();
if (C == 0 || Elt >= C->getNumOperands())
return DIDescriptor();
C = C->getOperand(Elt);
return DIDescriptor(dyn_cast<GlobalVariable>(C->stripPointerCasts()));
}
GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
if (GV == 0) return 0;
Constant *C = GV->getInitializer();
if (C == 0 || Elt >= C->getNumOperands())
return 0;
C = C->getOperand(Elt);
return dyn_cast<GlobalVariable>(C->stripPointerCasts());
}
DIAnchor::DIAnchor(GlobalVariable *GV)
: DIDescriptor(GV, dwarf::DW_TAG_anchor) {}
DIEnumerator::DIEnumerator(GlobalVariable *GV)
: DIDescriptor(GV, dwarf::DW_TAG_enumerator) {}
DISubrange::DISubrange(GlobalVariable *GV)
: DIDescriptor(GV, dwarf::DW_TAG_subrange_type) {}
DICompileUnit::DICompileUnit(GlobalVariable *GV)
: DIDescriptor(GV, dwarf::DW_TAG_compile_unit) {}
DIBasicType::DIBasicType(GlobalVariable *GV)
: DIType(GV, dwarf::DW_TAG_base_type) {}
DISubprogram::DISubprogram(GlobalVariable *GV)
: DIGlobal(GV, dwarf::DW_TAG_subprogram) {}
DIGlobalVariable::DIGlobalVariable(GlobalVariable *GV)
: DIGlobal(GV, dwarf::DW_TAG_variable) {}
DIBlock::DIBlock(GlobalVariable *GV)
: DIDescriptor(GV, dwarf::DW_TAG_lexical_block) {}
DIType::DIType(GlobalVariable *gv) : DIDescriptor(gv) {
if (!gv) return;
unsigned tag = getTag();
if (tag != dwarf::DW_TAG_base_type && !DIDerivedType::isDerivedType(tag) &&
!DICompositeType::isCompositeType(tag))
GV = 0;
}
bool DIType::isDerivedType(unsigned Tag) {
switch (Tag) {
case dwarf::DW_TAG_typedef:
case dwarf::DW_TAG_pointer_type:
case dwarf::DW_TAG_reference_type:
case dwarf::DW_TAG_const_type:
case dwarf::DW_TAG_volatile_type:
case dwarf::DW_TAG_restrict_type:
case dwarf::DW_TAG_member:
case dwarf::DW_TAG_inheritance:
return true;
default:
return false;
}
}
DIDerivedType::DIDerivedType(GlobalVariable *GV) : DIType(GV, true, true) {
if (GV && !isDerivedType(getTag()))
GV = 0;
}
bool DIType::isCompositeType(unsigned TAG) {
switch (TAG) {
case dwarf::DW_TAG_array_type:
case dwarf::DW_TAG_structure_type:
case dwarf::DW_TAG_union_type:
case dwarf::DW_TAG_enumeration_type:
case dwarf::DW_TAG_vector_type:
case dwarf::DW_TAG_subroutine_type:
case dwarf::DW_TAG_class_type:
return true;
default:
return false;
}
}
DICompositeType::DICompositeType(GlobalVariable *GV)
: DIDerivedType(GV, true, true) {
if (GV && !isCompositeType(getTag()))
GV = 0;
}
bool DIVariable::isVariable(unsigned Tag) {
switch (Tag) {
case dwarf::DW_TAG_auto_variable:
case dwarf::DW_TAG_arg_variable:
case dwarf::DW_TAG_return_variable:
return true;
default:
return false;
}
}
DIVariable::DIVariable(GlobalVariable *gv) : DIDescriptor(gv) {
if (gv && !isVariable(getTag()))
GV = 0;
}
unsigned DIArray::getNumElements() const {
assert (GV && "Invalid DIArray");
Constant *C = GV->getInitializer();
assert (C && "Invalid DIArray initializer");
return C->getNumOperands();
}
bool DICompileUnit::Verify() const {
if (isNull())
return false;
std::string Res;
if (getFilename(Res).empty())
return false;
return true;
}
bool DIType::Verify() const {
if (isNull())
return false;
if (getContext().isNull())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.isNull() && !CU.Verify())
return false;
return true;
}
bool DICompositeType::Verify() const {
if (isNull())
return false;
if (getContext().isNull())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.isNull() && !CU.Verify())
return false;
return true;
}
bool DISubprogram::Verify() const {
if (isNull())
return false;
if (getContext().isNull())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.Verify())
return false;
DICompositeType Ty = getType();
if (!Ty.isNull() && !Ty.Verify())
return false;
return true;
}
bool DIGlobalVariable::Verify() const {
if (isNull())
return false;
if (getContext().isNull())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.isNull() && !CU.Verify())
return false;
DIType Ty = getType();
if (!Ty.Verify())
return false;
if (!getGlobal())
return false;
return true;
}
bool DIVariable::Verify() const {
if (isNull())
return false;
if (getContext().isNull())
return false;
DIType Ty = getType();
if (!Ty.Verify())
return false;
return true;
}
uint64_t DIDerivedType::getOriginalTypeSize() const {
if (getTag() != dwarf::DW_TAG_member)
return getSizeInBits();
DIType BT = getTypeDerivedFrom();
if (BT.getTag() != dwarf::DW_TAG_base_type)
return getSizeInBits();
return BT.getSizeInBits();
}
bool DISubprogram::describes(const Function *F) {
assert (F && "Invalid function");
std::string Name;
getLinkageName(Name);
if (Name.empty())
getName(Name);
if (!Name.empty() && (strcmp(Name.c_str(), F->getNameStart()) == false))
return true;
return false;
}
DIFactory::DIFactory(Module &m) : M(m) {
StopPointFn = FuncStartFn = RegionStartFn = RegionEndFn = DeclareFn = 0;
EmptyStructPtr = PointerType::getUnqual(StructType::get(NULL, NULL));
}
Constant *DIFactory::getCastToEmpty(DIDescriptor D) {
if (D.isNull()) return Constant::getNullValue(EmptyStructPtr);
return ConstantExpr::getBitCast(D.getGV(), EmptyStructPtr);
}
Constant *DIFactory::GetTagConstant(unsigned TAG) {
assert((TAG & LLVMDebugVersionMask) == 0 &&
"Tag too large for debug encoding!");
return ConstantInt::get(Type::Int32Ty, TAG | LLVMDebugVersion);
}
Constant *DIFactory::GetStringConstant(const std::string &String) {
Constant *&Slot = StringCache[String];
if (Slot) return Slot;
const PointerType *DestTy = PointerType::getUnqual(Type::Int8Ty);
if (String.empty())
return Slot = ConstantPointerNull::get(DestTy);
Constant *ConstStr = ConstantArray::get(String);
GlobalVariable *StrGV = new GlobalVariable(ConstStr->getType(), true,
GlobalVariable::InternalLinkage,
ConstStr, ".str", &M);
StrGV->setSection("llvm.metadata");
return Slot = ConstantExpr::getBitCast(StrGV, DestTy);
}
DIAnchor DIFactory::GetOrCreateAnchor(unsigned TAG, const char *Name) {
const Type *EltTy = StructType::get(Type::Int32Ty, Type::Int32Ty, NULL);
Constant *C = M.getOrInsertGlobal(Name, EltTy);
assert(isa<GlobalVariable>(C) && "Incorrectly typed anchor?");
GlobalVariable *GV = cast<GlobalVariable>(C);
if (GV->hasInitializer())
return SubProgramAnchor = DIAnchor(GV);
GV->setLinkage(GlobalValue::LinkOnceAnyLinkage);
GV->setSection("llvm.metadata");
GV->setConstant(true);
M.addTypeName("llvm.dbg.anchor.type", EltTy);
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_anchor),
ConstantInt::get(Type::Int32Ty, TAG)
};
GV->setInitializer(ConstantStruct::get(Elts, 2));
return DIAnchor(GV);
}
DIAnchor DIFactory::GetOrCreateCompileUnitAnchor() {
if (!CompileUnitAnchor.isNull())
return CompileUnitAnchor;
return CompileUnitAnchor = GetOrCreateAnchor(dwarf::DW_TAG_compile_unit,
"llvm.dbg.compile_units");
}
DIAnchor DIFactory::GetOrCreateSubprogramAnchor() {
if (!SubProgramAnchor.isNull())
return SubProgramAnchor;
return SubProgramAnchor = GetOrCreateAnchor(dwarf::DW_TAG_subprogram,
"llvm.dbg.subprograms");
}
DIAnchor DIFactory::GetOrCreateGlobalVariableAnchor() {
if (!GlobalVariableAnchor.isNull())
return GlobalVariableAnchor;
return GlobalVariableAnchor = GetOrCreateAnchor(dwarf::DW_TAG_variable,
"llvm.dbg.global_variables");
}
DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
SmallVector<Constant*, 16> Elts;
for (unsigned i = 0; i != NumTys; ++i)
Elts.push_back(getCastToEmpty(Tys[i]));
Constant *Init = ConstantArray::get(ArrayType::get(EmptyStructPtr,
Elts.size()),
&Elts[0], Elts.size());
DIDescriptor &Entry = SimpleConstantCache[Init];
if (!Entry.isNull()) return DIArray(Entry.getGV());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.array", &M);
GV->setSection("llvm.metadata");
Entry = DIDescriptor(GV);
return DIArray(GV);
}
DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_subrange_type),
ConstantInt::get(Type::Int64Ty, Lo),
ConstantInt::get(Type::Int64Ty, Hi)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
DIDescriptor &Entry = SimpleConstantCache[Init];
if (!Entry.isNull()) return DISubrange(Entry.getGV());
M.addTypeName("llvm.dbg.subrange.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.subrange", &M);
GV->setSection("llvm.metadata");
Entry = DIDescriptor(GV);
return DISubrange(GV);
}
DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
const std::string &Filename,
const std::string &Directory,
const std::string &Producer,
bool isMain,
bool isOptimized,
const char *Flags,
unsigned RunTimeVer) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_compile_unit),
getCastToEmpty(GetOrCreateCompileUnitAnchor()),
ConstantInt::get(Type::Int32Ty, LangID),
GetStringConstant(Filename),
GetStringConstant(Directory),
GetStringConstant(Producer),
ConstantInt::get(Type::Int1Ty, isMain),
ConstantInt::get(Type::Int1Ty, isOptimized),
GetStringConstant(Flags),
ConstantInt::get(Type::Int32Ty, RunTimeVer)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.compile_unit.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.compile_unit", &M);
GV->setSection("llvm.metadata");
return DICompileUnit(GV);
}
DIEnumerator DIFactory::CreateEnumerator(const std::string &Name, uint64_t Val){
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_enumerator),
GetStringConstant(Name),
ConstantInt::get(Type::Int64Ty, Val)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.enumerator.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.enumerator", &M);
GV->setSection("llvm.metadata");
return DIEnumerator(GV);
}
DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
const std::string &Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
uint64_t SizeInBits,
uint64_t AlignInBits,
uint64_t OffsetInBits, unsigned Flags,
unsigned Encoding) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_base_type),
getCastToEmpty(Context),
GetStringConstant(Name),
getCastToEmpty(CompileUnit),
ConstantInt::get(Type::Int32Ty, LineNumber),
ConstantInt::get(Type::Int64Ty, SizeInBits),
ConstantInt::get(Type::Int64Ty, AlignInBits),
ConstantInt::get(Type::Int64Ty, OffsetInBits),
ConstantInt::get(Type::Int32Ty, Flags),
ConstantInt::get(Type::Int32Ty, Encoding)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.basictype.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.basictype", &M);
GV->setSection("llvm.metadata");
return DIBasicType(GV);
}
DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
DIDescriptor Context,
const std::string &Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
uint64_t SizeInBits,
uint64_t AlignInBits,
uint64_t OffsetInBits,
unsigned Flags,
DIType DerivedFrom) {
Constant *Elts[] = {
GetTagConstant(Tag),
getCastToEmpty(Context),
GetStringConstant(Name),
getCastToEmpty(CompileUnit),
ConstantInt::get(Type::Int32Ty, LineNumber),
ConstantInt::get(Type::Int64Ty, SizeInBits),
ConstantInt::get(Type::Int64Ty, AlignInBits),
ConstantInt::get(Type::Int64Ty, OffsetInBits),
ConstantInt::get(Type::Int32Ty, Flags),
getCastToEmpty(DerivedFrom)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.derivedtype.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.derivedtype", &M);
GV->setSection("llvm.metadata");
return DIDerivedType(GV);
}
DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
DIDescriptor Context,
const std::string &Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
uint64_t SizeInBits,
uint64_t AlignInBits,
uint64_t OffsetInBits,
unsigned Flags,
DIType DerivedFrom,
DIArray Elements,
unsigned RuntimeLang) {
Constant *Elts[] = {
GetTagConstant(Tag),
getCastToEmpty(Context),
GetStringConstant(Name),
getCastToEmpty(CompileUnit),
ConstantInt::get(Type::Int32Ty, LineNumber),
ConstantInt::get(Type::Int64Ty, SizeInBits),
ConstantInt::get(Type::Int64Ty, AlignInBits),
ConstantInt::get(Type::Int64Ty, OffsetInBits),
ConstantInt::get(Type::Int32Ty, Flags),
getCastToEmpty(DerivedFrom),
getCastToEmpty(Elements),
ConstantInt::get(Type::Int32Ty, RuntimeLang)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.composite.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.composite", &M);
GV->setSection("llvm.metadata");
return DICompositeType(GV);
}
DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
const std::string &Name,
const std::string &DisplayName,
const std::string &LinkageName,
DICompileUnit CompileUnit,
unsigned LineNo, DIType Type,
bool isLocalToUnit,
bool isDefinition) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_subprogram),
getCastToEmpty(GetOrCreateSubprogramAnchor()),
getCastToEmpty(Context),
GetStringConstant(Name),
GetStringConstant(DisplayName),
GetStringConstant(LinkageName),
getCastToEmpty(CompileUnit),
ConstantInt::get(Type::Int32Ty, LineNo),
getCastToEmpty(Type),
ConstantInt::get(Type::Int1Ty, isLocalToUnit),
ConstantInt::get(Type::Int1Ty, isDefinition)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.subprogram.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.subprogram", &M);
GV->setSection("llvm.metadata");
return DISubprogram(GV);
}
DIGlobalVariable
DIFactory::CreateGlobalVariable(DIDescriptor Context, const std::string &Name,
const std::string &DisplayName,
const std::string &LinkageName,
DICompileUnit CompileUnit,
unsigned LineNo, DIType Type,bool isLocalToUnit,
bool isDefinition, llvm::GlobalVariable *Val) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_variable),
getCastToEmpty(GetOrCreateGlobalVariableAnchor()),
getCastToEmpty(Context),
GetStringConstant(Name),
GetStringConstant(DisplayName),
GetStringConstant(LinkageName),
getCastToEmpty(CompileUnit),
ConstantInt::get(Type::Int32Ty, LineNo),
getCastToEmpty(Type),
ConstantInt::get(Type::Int1Ty, isLocalToUnit),
ConstantInt::get(Type::Int1Ty, isDefinition),
ConstantExpr::getBitCast(Val, EmptyStructPtr)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.global_variable.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.global_variable", &M);
GV->setSection("llvm.metadata");
return DIGlobalVariable(GV);
}
DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
const std::string &Name,
DICompileUnit CompileUnit, unsigned LineNo,
DIType Type) {
Constant *Elts[] = {
GetTagConstant(Tag),
getCastToEmpty(Context),
GetStringConstant(Name),
getCastToEmpty(CompileUnit),
ConstantInt::get(Type::Int32Ty, LineNo),
getCastToEmpty(Type)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.variable.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.variable", &M);
GV->setSection("llvm.metadata");
return DIVariable(GV);
}
DIBlock DIFactory::CreateBlock(DIDescriptor Context) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_lexical_block),
getCastToEmpty(Context)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
M.addTypeName("llvm.dbg.block.type", Init->getType());
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
GlobalValue::InternalLinkage,
Init, "llvm.dbg.block", &M);
GV->setSection("llvm.metadata");
return DIBlock(GV);
}
void DIFactory::InsertStopPoint(DICompileUnit CU, unsigned LineNo,
unsigned ColNo, BasicBlock *BB) {
if (!StopPointFn)
StopPointFn = llvm::Intrinsic::getDeclaration(&M,
llvm::Intrinsic::dbg_stoppoint);
Value *Args[] = {
llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo),
llvm::ConstantInt::get(llvm::Type::Int32Ty, ColNo),
getCastToEmpty(CU)
};
CallInst::Create(StopPointFn, Args, Args+3, "", BB);
}
void DIFactory::InsertSubprogramStart(DISubprogram SP, BasicBlock *BB) {
if (!FuncStartFn)
FuncStartFn = llvm::Intrinsic::getDeclaration(&M,
llvm::Intrinsic::dbg_func_start);
CallInst::Create(FuncStartFn, getCastToEmpty(SP), "", BB);
}
void DIFactory::InsertRegionStart(DIDescriptor D, BasicBlock *BB) {
if (!RegionStartFn)
RegionStartFn = llvm::Intrinsic::getDeclaration(&M,
llvm::Intrinsic::dbg_region_start);
CallInst::Create(RegionStartFn, getCastToEmpty(D), "", BB);
}
void DIFactory::InsertRegionEnd(DIDescriptor D, BasicBlock *BB) {
if (!RegionEndFn)
RegionEndFn = llvm::Intrinsic::getDeclaration(&M,
llvm::Intrinsic::dbg_region_end);
CallInst::Create(RegionEndFn, getCastToEmpty(D), "", BB);
}
void DIFactory::InsertDeclare(llvm::Value *Storage, DIVariable D,
BasicBlock *BB) {
Storage = new llvm::BitCastInst(Storage, EmptyStructPtr, "", BB);
if (!DeclareFn)
DeclareFn = llvm::Intrinsic::getDeclaration(&M,
llvm::Intrinsic::dbg_declare);
Value *Args[] = { Storage, getCastToEmpty(D) };
CallInst::Create(DeclareFn, Args, Args+2, "", BB);
}
namespace llvm {
const DbgStopPointInst *findStopPoint(const Instruction *Inst)
{
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(Inst))
return DSI;
const BasicBlock *BB = Inst->getParent();
BasicBlock::const_iterator I = Inst, B;
do {
B = BB->begin();
if (I != B) {
do {
--I;
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
return DSI;
} while (I != B);
}
BB = I->getParent()->getUniquePredecessor();
if (BB)
I = BB->getTerminator();
} while (BB != 0);
return 0;
}
const DbgStopPointInst *findBBStopPoint(const BasicBlock *BB)
{
for(BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
return DSI;
}
BB = BB->getUniquePredecessor();
if (BB)
return findStopPoint(BB->getTerminator());
return 0;
}
Value *findDbgGlobalDeclare(GlobalVariable *V)
{
const Module *M = V->getParent();
const Type *Ty = M->getTypeByName("llvm.dbg.global_variable.type");
if (!Ty)
return 0;
Ty = PointerType::get(Ty, 0);
Value *Val = V->stripPointerCasts();
for (Value::use_iterator I = Val->use_begin(), E =Val->use_end();
I != E; ++I) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I)) {
if (CE->getOpcode() == Instruction::BitCast) {
Value *VV = CE;
while (VV->hasOneUse()) {
VV = *VV->use_begin();
}
if (VV->getType() == Ty)
return VV;
}
}
}
if (Val->getType() == Ty)
return Val;
return 0;
}
const DbgDeclareInst *findDbgDeclare(const Value *V, bool stripCasts)
{
if (stripCasts) {
V = V->stripPointerCasts();
for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
I != E; ++I) {
if (isa<BitCastInst>(I))
return findDbgDeclare(*I, false);
}
return 0;
}
for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
I != E; ++I) {
if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(I))
return DDI;
}
return 0;
}
bool getLocationInfo(const Value *V, std::string &DisplayName, std::string &Type,
unsigned &LineNo, std::string &File, std::string &Dir)
{
DICompileUnit Unit;
DIType TypeD;
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(const_cast<Value*>(V))) {
Value *DIGV = findDbgGlobalDeclare(GV);
if (!DIGV)
return false;
DIGlobalVariable Var(cast<GlobalVariable>(DIGV));
Var.getDisplayName(DisplayName);
LineNo = Var.getLineNumber();
Unit = Var.getCompileUnit();
TypeD = Var.getType();
} else {
const DbgDeclareInst *DDI = findDbgDeclare(V);
if (!DDI)
return false;
DIVariable Var(cast<GlobalVariable>(DDI->getVariable()));
Var.getName(DisplayName);
LineNo = Var.getLineNumber();
Unit = Var.getCompileUnit();
TypeD = Var.getType();
}
TypeD.getName(Type);
Unit.getFilename(File);
Unit.getDirectory(Dir);
return true;
}
}
void DIDescriptor::dump() const {
cerr << "[" << dwarf::TagString(getTag()) << "] ";
cerr << std::hex << "[GV:" << GV << "]" << std::dec;
}
void DICompileUnit::dump() const {
if (getLanguage())
cerr << " [" << dwarf::LanguageString(getLanguage()) << "] ";
std::string Res1, Res2;
cerr << " [" << getDirectory(Res1) << "/" << getFilename(Res2) << " ]";
}
void DIType::dump() const {
if (isNull()) return;
std::string Res;
if (!getName(Res).empty())
cerr << " [" << Res << "] ";
unsigned Tag = getTag();
cerr << " [" << dwarf::TagString(Tag) << "] ";
getCompileUnit().dump();
cerr << " ["
<< getLineNumber() << ", "
<< getSizeInBits() << ", "
<< getAlignInBits() << ", "
<< getOffsetInBits()
<< "] ";
if (isPrivate())
cerr << " [private] ";
else if (isProtected())
cerr << " [protected] ";
if (isForwardDecl())
cerr << " [fwd] ";
if (isBasicType(Tag))
DIBasicType(GV).dump();
else if (isDerivedType(Tag))
DIDerivedType(GV).dump();
else if (isCompositeType(Tag))
DICompositeType(GV).dump();
else {
cerr << "Invalid DIType\n";
return;
}
cerr << "\n";
}
void DIBasicType::dump() const {
cerr << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
}
void DIDerivedType::dump() const {
cerr << "\n\t Derived From: "; getTypeDerivedFrom().dump();
}
void DICompositeType::dump() const {
DIArray A = getTypeArray();
if (A.isNull())
return;
cerr << " [" << A.getNumElements() << " elements]";
}
void DIGlobal::dump() const {
std::string Res;
if (!getName(Res).empty())
cerr << " [" << Res << "] ";
unsigned Tag = getTag();
cerr << " [" << dwarf::TagString(Tag) << "] ";
getCompileUnit().dump();
cerr << " [" << getLineNumber() << "] ";
if (isLocalToUnit())
cerr << " [local] ";
if (isDefinition())
cerr << " [def] ";
if (isGlobalVariable(Tag))
DIGlobalVariable(GV).dump();
cerr << "\n";
}
void DISubprogram::dump() const {
DIGlobal::dump();
}
void DIGlobalVariable::dump() const {
cerr << " ["; getGlobal()->dump(); cerr << "] ";
}
void DIVariable::dump() const {
std::string Res;
if (!getName(Res).empty())
cerr << " [" << Res << "] ";
getCompileUnit().dump();
cerr << " [" << getLineNumber() << "] ";
getType().dump();
cerr << "\n";
}