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llvm/lib/Analysis/DebugInfo.cpp
Devang Patel b4645643de Set DW_AT_artificial only if argument is marked as artificial. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95461 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-06 01:02:37 +00:00

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//===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
//
// 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 helper classes used to build and interpret debug
// information in LLVM IR form.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Target/TargetMachine.h" // FIXME: LAYERING VIOLATION!
#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/ADT/SmallPtrSet.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/DebugLoc.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
using namespace llvm::dwarf;
//===----------------------------------------------------------------------===//
// DIDescriptor
//===----------------------------------------------------------------------===//
/// ValidDebugInfo - Return true if V represents valid debug info value.
/// FIXME : Add DIDescriptor.isValid()
bool DIDescriptor::ValidDebugInfo(MDNode *N, unsigned OptLevel) {
if (!N)
return false;
DIDescriptor DI(N);
// Check current version. Allow Version6 for now.
unsigned Version = DI.getVersion();
if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6)
return false;
switch (DI.getTag()) {
case DW_TAG_variable:
assert(DIVariable(N).Verify() && "Invalid DebugInfo value");
break;
case DW_TAG_compile_unit:
assert(DICompileUnit(N).Verify() && "Invalid DebugInfo value");
break;
case DW_TAG_subprogram:
assert(DISubprogram(N).Verify() && "Invalid DebugInfo value");
break;
case DW_TAG_lexical_block:
// FIXME: This interfers with the quality of generated code during
// optimization.
if (OptLevel != CodeGenOpt::None)
return false;
// FALLTHROUGH
default:
break;
}
return true;
}
DIDescriptor::DIDescriptor(MDNode *N, unsigned RequiredTag) {
DbgNode = N;
// If this is non-null, check to see if the Tag matches. If not, set to null.
if (N && getTag() != RequiredTag) {
DbgNode = 0;
}
}
StringRef
DIDescriptor::getStringField(unsigned Elt) const {
if (DbgNode == 0)
return StringRef();
if (Elt < DbgNode->getNumOperands())
if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getOperand(Elt)))
return MDS->getString();
return StringRef();
}
uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
if (DbgNode == 0)
return 0;
if (Elt < DbgNode->getNumOperands())
if (ConstantInt *CI = dyn_cast<ConstantInt>(DbgNode->getOperand(Elt)))
return CI->getZExtValue();
return 0;
}
DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
if (DbgNode == 0)
return DIDescriptor();
if (Elt < DbgNode->getNumOperands() && DbgNode->getOperand(Elt))
return DIDescriptor(dyn_cast<MDNode>(DbgNode->getOperand(Elt)));
return DIDescriptor();
}
GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
if (DbgNode == 0)
return 0;
if (Elt < DbgNode->getNumOperands())
return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
return 0;
}
unsigned DIVariable::getNumAddrElements() const {
return DbgNode->getNumOperands()-6;
}
//===----------------------------------------------------------------------===//
// Predicates
//===----------------------------------------------------------------------===//
/// isBasicType - Return true if the specified tag is legal for
/// DIBasicType.
bool DIDescriptor::isBasicType() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_base_type;
}
/// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
bool DIDescriptor::isDerivedType() const {
assert(!isNull() && "Invalid descriptor!");
switch (getTag()) {
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:
// CompositeTypes are currently modelled as DerivedTypes.
return isCompositeType();
}
}
/// isCompositeType - Return true if the specified tag is legal for
/// DICompositeType.
bool DIDescriptor::isCompositeType() const {
assert(!isNull() && "Invalid descriptor!");
switch (getTag()) {
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;
}
}
/// isVariable - Return true if the specified tag is legal for DIVariable.
bool DIDescriptor::isVariable() const {
assert(!isNull() && "Invalid descriptor!");
switch (getTag()) {
case dwarf::DW_TAG_auto_variable:
case dwarf::DW_TAG_arg_variable:
case dwarf::DW_TAG_return_variable:
return true;
default:
return false;
}
}
/// isType - Return true if the specified tag is legal for DIType.
bool DIDescriptor::isType() const {
return isBasicType() || isCompositeType() || isDerivedType();
}
/// isSubprogram - Return true if the specified tag is legal for
/// DISubprogram.
bool DIDescriptor::isSubprogram() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_subprogram;
}
/// isGlobalVariable - Return true if the specified tag is legal for
/// DIGlobalVariable.
bool DIDescriptor::isGlobalVariable() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_variable;
}
/// isGlobal - Return true if the specified tag is legal for DIGlobal.
bool DIDescriptor::isGlobal() const {
return isGlobalVariable();
}
/// isScope - Return true if the specified tag is one of the scope
/// related tag.
bool DIDescriptor::isScope() const {
assert(!isNull() && "Invalid descriptor!");
switch (getTag()) {
case dwarf::DW_TAG_compile_unit:
case dwarf::DW_TAG_lexical_block:
case dwarf::DW_TAG_subprogram:
case dwarf::DW_TAG_namespace:
return true;
default:
break;
}
return false;
}
/// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
bool DIDescriptor::isCompileUnit() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_compile_unit;
}
/// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
bool DIDescriptor::isNameSpace() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_namespace;
}
/// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
bool DIDescriptor::isLexicalBlock() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_lexical_block;
}
/// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
bool DIDescriptor::isSubrange() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_subrange_type;
}
/// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
bool DIDescriptor::isEnumerator() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_enumerator;
}
//===----------------------------------------------------------------------===//
// Simple Descriptor Constructors and other Methods
//===----------------------------------------------------------------------===//
DIType::DIType(MDNode *N) : DIDescriptor(N) {
if (!N) return;
if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
DbgNode = 0;
}
}
unsigned DIArray::getNumElements() const {
assert(DbgNode && "Invalid DIArray");
return DbgNode->getNumOperands();
}
/// replaceAllUsesWith - Replace all uses of debug info referenced by
/// this descriptor. After this completes, the current debug info value
/// is erased.
void DIDerivedType::replaceAllUsesWith(DIDescriptor &D) {
if (isNull())
return;
assert(!D.isNull() && "Can not replace with null");
// Since we use a TrackingVH for the node, its easy for clients to manufacture
// legitimate situations where they want to replaceAllUsesWith() on something
// which, due to uniquing, has merged with the source. We shield clients from
// this detail by allowing a value to be replaced with replaceAllUsesWith()
// itself.
if (getNode() != D.getNode()) {
MDNode *Node = DbgNode;
Node->replaceAllUsesWith(D.getNode());
Node->destroy();
}
}
/// Verify - Verify that a compile unit is well formed.
bool DICompileUnit::Verify() const {
if (isNull())
return false;
StringRef N = getFilename();
if (N.empty())
return false;
// It is possible that directory and produce string is empty.
return true;
}
/// Verify - Verify that a type descriptor is well formed.
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;
}
/// Verify - Verify that a composite type descriptor is well formed.
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;
}
/// Verify - Verify that a subprogram descriptor is well formed.
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;
}
/// Verify - Verify that a global variable descriptor is well formed.
bool DIGlobalVariable::Verify() const {
if (isNull())
return false;
if (getDisplayName().empty())
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;
}
/// Verify - Verify that a variable descriptor is well formed.
bool DIVariable::Verify() const {
if (isNull())
return false;
if (getContext().isNull())
return false;
DIType Ty = getType();
if (!Ty.Verify())
return false;
return true;
}
/// getOriginalTypeSize - If this type is derived from a base type then
/// return base type size.
uint64_t DIDerivedType::getOriginalTypeSize() const {
unsigned Tag = getTag();
if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
Tag == dwarf::DW_TAG_restrict_type) {
DIType BaseType = getTypeDerivedFrom();
// If this type is not derived from any type then take conservative
// approach.
if (BaseType.isNull())
return getSizeInBits();
if (BaseType.isDerivedType())
return DIDerivedType(BaseType.getNode()).getOriginalTypeSize();
else
return BaseType.getSizeInBits();
}
return getSizeInBits();
}
/// describes - Return true if this subprogram provides debugging
/// information for the function F.
bool DISubprogram::describes(const Function *F) {
assert(F && "Invalid function");
StringRef Name = getLinkageName();
if (Name.empty())
Name = getName();
if (F->getName() == Name)
return true;
return false;
}
StringRef DIScope::getFilename() const {
if (isLexicalBlock())
return DILexicalBlock(DbgNode).getFilename();
if (isSubprogram())
return DISubprogram(DbgNode).getFilename();
if (isCompileUnit())
return DICompileUnit(DbgNode).getFilename();
if (isNameSpace())
return DINameSpace(DbgNode).getFilename();
assert(0 && "Invalid DIScope!");
return StringRef();
}
StringRef DIScope::getDirectory() const {
if (isLexicalBlock())
return DILexicalBlock(DbgNode).getDirectory();
if (isSubprogram())
return DISubprogram(DbgNode).getDirectory();
if (isCompileUnit())
return DICompileUnit(DbgNode).getDirectory();
if (isNameSpace())
return DINameSpace(DbgNode).getDirectory();
assert(0 && "Invalid DIScope!");
return StringRef();
}
//===----------------------------------------------------------------------===//
// DIDescriptor: dump routines for all descriptors.
//===----------------------------------------------------------------------===//
/// dump - Print descriptor.
void DIDescriptor::dump() const {
dbgs() << "[" << dwarf::TagString(getTag()) << "] ";
dbgs().write_hex((intptr_t) &*DbgNode) << ']';
}
/// dump - Print compile unit.
void DICompileUnit::dump() const {
if (getLanguage())
dbgs() << " [" << dwarf::LanguageString(getLanguage()) << "] ";
dbgs() << " [" << getDirectory() << "/" << getFilename() << " ]";
}
/// dump - Print type.
void DIType::dump() const {
if (isNull()) return;
StringRef Res = getName();
if (!Res.empty())
dbgs() << " [" << Res << "] ";
unsigned Tag = getTag();
dbgs() << " [" << dwarf::TagString(Tag) << "] ";
// TODO : Print context
getCompileUnit().dump();
dbgs() << " ["
<< getLineNumber() << ", "
<< getSizeInBits() << ", "
<< getAlignInBits() << ", "
<< getOffsetInBits()
<< "] ";
if (isPrivate())
dbgs() << " [private] ";
else if (isProtected())
dbgs() << " [protected] ";
if (isForwardDecl())
dbgs() << " [fwd] ";
if (isBasicType())
DIBasicType(DbgNode).dump();
else if (isDerivedType())
DIDerivedType(DbgNode).dump();
else if (isCompositeType())
DICompositeType(DbgNode).dump();
else {
dbgs() << "Invalid DIType\n";
return;
}
dbgs() << "\n";
}
/// dump - Print basic type.
void DIBasicType::dump() const {
dbgs() << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
}
/// dump - Print derived type.
void DIDerivedType::dump() const {
dbgs() << "\n\t Derived From: "; getTypeDerivedFrom().dump();
}
/// dump - Print composite type.
void DICompositeType::dump() const {
DIArray A = getTypeArray();
if (A.isNull())
return;
dbgs() << " [" << A.getNumElements() << " elements]";
}
/// dump - Print global.
void DIGlobal::dump() const {
StringRef Res = getName();
if (!Res.empty())
dbgs() << " [" << Res << "] ";
unsigned Tag = getTag();
dbgs() << " [" << dwarf::TagString(Tag) << "] ";
// TODO : Print context
getCompileUnit().dump();
dbgs() << " [" << getLineNumber() << "] ";
if (isLocalToUnit())
dbgs() << " [local] ";
if (isDefinition())
dbgs() << " [def] ";
if (isGlobalVariable())
DIGlobalVariable(DbgNode).dump();
dbgs() << "\n";
}
/// dump - Print subprogram.
void DISubprogram::dump() const {
StringRef Res = getName();
if (!Res.empty())
dbgs() << " [" << Res << "] ";
unsigned Tag = getTag();
dbgs() << " [" << dwarf::TagString(Tag) << "] ";
// TODO : Print context
getCompileUnit().dump();
dbgs() << " [" << getLineNumber() << "] ";
if (isLocalToUnit())
dbgs() << " [local] ";
if (isDefinition())
dbgs() << " [def] ";
dbgs() << "\n";
}
/// dump - Print global variable.
void DIGlobalVariable::dump() const {
dbgs() << " [";
getGlobal()->dump();
dbgs() << "] ";
}
/// dump - Print variable.
void DIVariable::dump() const {
StringRef Res = getName();
if (!Res.empty())
dbgs() << " [" << Res << "] ";
getCompileUnit().dump();
dbgs() << " [" << getLineNumber() << "] ";
getType().dump();
dbgs() << "\n";
// FIXME: Dump complex addresses
}
//===----------------------------------------------------------------------===//
// DIFactory: Basic Helpers
//===----------------------------------------------------------------------===//
DIFactory::DIFactory(Module &m)
: M(m), VMContext(M.getContext()), DeclareFn(0), ValueFn(0) {}
Constant *DIFactory::GetTagConstant(unsigned TAG) {
assert((TAG & LLVMDebugVersionMask) == 0 &&
"Tag too large for debug encoding!");
return ConstantInt::get(Type::getInt32Ty(VMContext), TAG | LLVMDebugVersion);
}
//===----------------------------------------------------------------------===//
// DIFactory: Primary Constructors
//===----------------------------------------------------------------------===//
/// GetOrCreateArray - Create an descriptor for an array of descriptors.
/// This implicitly uniques the arrays created.
DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
SmallVector<Value*, 16> Elts;
if (NumTys == 0)
Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
else
for (unsigned i = 0; i != NumTys; ++i)
Elts.push_back(Tys[i].getNode());
return DIArray(MDNode::get(VMContext,Elts.data(), Elts.size()));
}
/// GetOrCreateSubrange - Create a descriptor for a value range. This
/// implicitly uniques the values returned.
DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_subrange_type),
ConstantInt::get(Type::getInt64Ty(VMContext), Lo),
ConstantInt::get(Type::getInt64Ty(VMContext), Hi)
};
return DISubrange(MDNode::get(VMContext, &Elts[0], 3));
}
/// CreateCompileUnit - Create a new descriptor for the specified compile
/// unit. Note that this does not unique compile units within the module.
DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
StringRef Filename,
StringRef Directory,
StringRef Producer,
bool isMain,
bool isOptimized,
StringRef Flags,
unsigned RunTimeVer) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_compile_unit),
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
ConstantInt::get(Type::getInt32Ty(VMContext), LangID),
MDString::get(VMContext, Filename),
MDString::get(VMContext, Directory),
MDString::get(VMContext, Producer),
ConstantInt::get(Type::getInt1Ty(VMContext), isMain),
ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
MDString::get(VMContext, Flags),
ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeVer)
};
return DICompileUnit(MDNode::get(VMContext, &Elts[0], 10));
}
/// CreateEnumerator - Create a single enumerator value.
DIEnumerator DIFactory::CreateEnumerator(StringRef Name, uint64_t Val){
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_enumerator),
MDString::get(VMContext, Name),
ConstantInt::get(Type::getInt64Ty(VMContext), Val)
};
return DIEnumerator(MDNode::get(VMContext, &Elts[0], 3));
}
/// CreateBasicType - Create a basic type like int, float, etc.
DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
uint64_t SizeInBits,
uint64_t AlignInBits,
uint64_t OffsetInBits, unsigned Flags,
unsigned Encoding) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_base_type),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
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),
ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
};
return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
}
/// CreateBasicType - Create a basic type like int, float, etc.
DIBasicType DIFactory::CreateBasicTypeEx(DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
Constant *SizeInBits,
Constant *AlignInBits,
Constant *OffsetInBits, unsigned Flags,
unsigned Encoding) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_base_type),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
SizeInBits,
AlignInBits,
OffsetInBits,
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
};
return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
}
/// CreateArtificialType - Create a new DIType with "artificial" flag set.
DIType DIFactory::CreateArtificialType(DIType Ty) {
if (Ty.isArtificial())
return Ty;
SmallVector<Value *, 9> Elts;
MDNode *N = Ty.getNode();
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()));
}
/// CreateDerivedType - Create a derived type like const qualified type,
/// pointer, typedef, etc.
DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
uint64_t SizeInBits,
uint64_t AlignInBits,
uint64_t OffsetInBits,
unsigned Flags,
DIType DerivedFrom) {
Value *Elts[] = {
GetTagConstant(Tag),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
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),
DerivedFrom.getNode(),
};
return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
}
/// CreateDerivedType - Create a derived type like const qualified type,
/// pointer, typedef, etc.
DIDerivedType DIFactory::CreateDerivedTypeEx(unsigned Tag,
DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
Constant *SizeInBits,
Constant *AlignInBits,
Constant *OffsetInBits,
unsigned Flags,
DIType DerivedFrom) {
Value *Elts[] = {
GetTagConstant(Tag),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
SizeInBits,
AlignInBits,
OffsetInBits,
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
DerivedFrom.getNode(),
};
return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
}
/// CreateCompositeType - Create a composite type like array, struct, etc.
DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
uint64_t SizeInBits,
uint64_t AlignInBits,
uint64_t OffsetInBits,
unsigned Flags,
DIType DerivedFrom,
DIArray Elements,
unsigned RuntimeLang,
MDNode *ContainingType) {
Value *Elts[] = {
GetTagConstant(Tag),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
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),
DerivedFrom.getNode(),
Elements.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang),
ContainingType
};
return DICompositeType(MDNode::get(VMContext, &Elts[0], 13));
}
/// CreateCompositeType - Create a composite type like array, struct, etc.
DICompositeType DIFactory::CreateCompositeTypeEx(unsigned Tag,
DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNumber,
Constant *SizeInBits,
Constant *AlignInBits,
Constant *OffsetInBits,
unsigned Flags,
DIType DerivedFrom,
DIArray Elements,
unsigned RuntimeLang) {
Value *Elts[] = {
GetTagConstant(Tag),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
SizeInBits,
AlignInBits,
OffsetInBits,
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
DerivedFrom.getNode(),
Elements.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang)
};
return DICompositeType(MDNode::get(VMContext, &Elts[0], 12));
}
/// CreateSubprogram - Create a new descriptor for the specified subprogram.
/// See comments in DISubprogram for descriptions of these fields. This
/// method does not unique the generated descriptors.
DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
StringRef Name,
StringRef DisplayName,
StringRef LinkageName,
DICompileUnit CompileUnit,
unsigned LineNo, DIType Ty,
bool isLocalToUnit,
bool isDefinition,
unsigned VK, unsigned VIndex,
DIType ContainingType,
bool isArtificial) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_subprogram),
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
Context.getNode(),
MDString::get(VMContext, Name),
MDString::get(VMContext, DisplayName),
MDString::get(VMContext, LinkageName),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
Ty.getNode(),
ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
ConstantInt::get(Type::getInt32Ty(VMContext), (unsigned)VK),
ConstantInt::get(Type::getInt32Ty(VMContext), VIndex),
ContainingType.getNode(),
ConstantInt::get(Type::getInt1Ty(VMContext), isArtificial)
};
return DISubprogram(MDNode::get(VMContext, &Elts[0], 15));
}
/// CreateSubprogramDefinition - Create new subprogram descriptor for the
/// given declaration.
DISubprogram DIFactory::CreateSubprogramDefinition(DISubprogram &SPDeclaration) {
if (SPDeclaration.isDefinition())
return DISubprogram(SPDeclaration.getNode());
MDNode *DeclNode = SPDeclaration.getNode();
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_subprogram),
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
DeclNode->getOperand(2), // Context
DeclNode->getOperand(3), // Name
DeclNode->getOperand(4), // DisplayName
DeclNode->getOperand(5), // LinkageName
DeclNode->getOperand(6), // CompileUnit
DeclNode->getOperand(7), // LineNo
DeclNode->getOperand(8), // Type
DeclNode->getOperand(9), // isLocalToUnit
ConstantInt::get(Type::getInt1Ty(VMContext), true),
DeclNode->getOperand(11), // Virtuality
DeclNode->getOperand(12), // VIndex
DeclNode->getOperand(13), // Containting Type
DeclNode->getOperand(14) // isArtificial
};
return DISubprogram(MDNode::get(VMContext, &Elts[0], 15));
}
/// CreateGlobalVariable - Create a new descriptor for the specified global.
DIGlobalVariable
DIFactory::CreateGlobalVariable(DIDescriptor Context, StringRef Name,
StringRef DisplayName,
StringRef LinkageName,
DICompileUnit CompileUnit,
unsigned LineNo, DIType Ty,bool isLocalToUnit,
bool isDefinition, llvm::GlobalVariable *Val) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_variable),
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
Context.getNode(),
MDString::get(VMContext, Name),
MDString::get(VMContext, DisplayName),
MDString::get(VMContext, LinkageName),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
Ty.getNode(),
ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
Val
};
Value *const *Vs = &Elts[0];
MDNode *Node = MDNode::get(VMContext,Vs, 12);
// Create a named metadata so that we do not lose this mdnode.
NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.gv");
NMD->addOperand(Node);
return DIGlobalVariable(Node);
}
/// CreateVariable - Create a new descriptor for the specified variable.
DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
StringRef Name,
DICompileUnit CompileUnit, unsigned LineNo,
DIType Ty) {
Value *Elts[] = {
GetTagConstant(Tag),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
Ty.getNode(),
};
return DIVariable(MDNode::get(VMContext, &Elts[0], 6));
}
/// CreateComplexVariable - Create a new descriptor for the specified variable
/// which has a complex address expression for its address.
DIVariable DIFactory::CreateComplexVariable(unsigned Tag, DIDescriptor Context,
const std::string &Name,
DICompileUnit CompileUnit,
unsigned LineNo,
DIType Ty,
SmallVector<Value *, 9> &addr) {
SmallVector<Value *, 9> Elts;
Elts.push_back(GetTagConstant(Tag));
Elts.push_back(Context.getNode());
Elts.push_back(MDString::get(VMContext, Name));
Elts.push_back(CompileUnit.getNode());
Elts.push_back(ConstantInt::get(Type::getInt32Ty(VMContext), LineNo));
Elts.push_back(Ty.getNode());
Elts.insert(Elts.end(), addr.begin(), addr.end());
return DIVariable(MDNode::get(VMContext, &Elts[0], 6+addr.size()));
}
/// CreateBlock - This creates a descriptor for a lexical block with the
/// specified parent VMContext.
DILexicalBlock DIFactory::CreateLexicalBlock(DIDescriptor Context) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_lexical_block),
Context.getNode()
};
return DILexicalBlock(MDNode::get(VMContext, &Elts[0], 2));
}
/// CreateNameSpace - This creates new descriptor for a namespace
/// with the specified parent context.
DINameSpace DIFactory::CreateNameSpace(DIDescriptor Context, StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNo) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_namespace),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo)
};
return DINameSpace(MDNode::get(VMContext, &Elts[0], 5));
}
/// CreateLocation - Creates a debug info location.
DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
DIScope S, DILocation OrigLoc) {
Value *Elts[] = {
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
ConstantInt::get(Type::getInt32Ty(VMContext), ColumnNo),
S.getNode(),
OrigLoc.getNode(),
};
return DILocation(MDNode::get(VMContext, &Elts[0], 4));
}
/// CreateLocation - Creates a debug info location.
DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
DIScope S, MDNode *OrigLoc) {
Value *Elts[] = {
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
ConstantInt::get(Type::getInt32Ty(VMContext), ColumnNo),
S.getNode(),
OrigLoc
};
return DILocation(MDNode::get(VMContext, &Elts[0], 4));
}
//===----------------------------------------------------------------------===//
// DIFactory: Routines for inserting code into a function
//===----------------------------------------------------------------------===//
/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
Instruction *InsertBefore) {
assert(Storage && "no storage passed to dbg.declare");
assert(D.getNode() && "empty DIVariable passed to dbg.declare");
if (!DeclareFn)
DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
Value *Args[] = { MDNode::get(Storage->getContext(), &Storage, 1),
D.getNode() };
return CallInst::Create(DeclareFn, Args, Args+2, "", InsertBefore);
}
/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
BasicBlock *InsertAtEnd) {
assert(Storage && "no storage passed to dbg.declare");
assert(D.getNode() && "empty DIVariable passed to dbg.declare");
if (!DeclareFn)
DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
Value *Args[] = { MDNode::get(Storage->getContext(), &Storage, 1),
D.getNode() };
// If this block already has a terminator then insert this intrinsic
// before the terminator.
if (TerminatorInst *T = InsertAtEnd->getTerminator())
return CallInst::Create(DeclareFn, Args, Args+2, "", T);
else
return CallInst::Create(DeclareFn, Args, Args+2, "", InsertAtEnd);}
/// InsertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
Instruction *DIFactory::InsertDbgValueIntrinsic(Value *V, uint64_t Offset,
DIVariable D,
Instruction *InsertBefore) {
assert(V && "no value passed to dbg.value");
assert(D.getNode() && "empty DIVariable passed to dbg.value");
if (!ValueFn)
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
Value *Args[] = { MDNode::get(V->getContext(), &V, 1),
ConstantInt::get(Type::getInt64Ty(V->getContext()), Offset),
D.getNode() };
return CallInst::Create(ValueFn, Args, Args+3, "", InsertBefore);
}
/// InsertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
Instruction *DIFactory::InsertDbgValueIntrinsic(Value *V, uint64_t Offset,
DIVariable D,
BasicBlock *InsertAtEnd) {
assert(V && "no value passed to dbg.value");
assert(D.getNode() && "empty DIVariable passed to dbg.value");
if (!ValueFn)
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
Value *Args[] = { MDNode::get(V->getContext(), &V, 1),
ConstantInt::get(Type::getInt64Ty(V->getContext()), Offset),
D.getNode() };
return CallInst::Create(ValueFn, Args, Args+3, "", InsertAtEnd);
}
//===----------------------------------------------------------------------===//
// DebugInfoFinder implementations.
//===----------------------------------------------------------------------===//
/// processModule - Process entire module and collect debug info.
void DebugInfoFinder::processModule(Module &M) {
unsigned MDDbgKind = M.getMDKindID("dbg");
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
for (Function::iterator FI = (*I).begin(), FE = (*I).end(); FI != FE; ++FI)
for (BasicBlock::iterator BI = (*FI).begin(), BE = (*FI).end(); BI != BE;
++BI) {
if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
processDeclare(DDI);
else if (MDNode *L = BI->getMetadata(MDDbgKind))
processLocation(DILocation(L));
}
NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.gv");
if (!NMD)
return;
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
DIGlobalVariable DIG(cast<MDNode>(NMD->getOperand(i)));
if (addGlobalVariable(DIG)) {
addCompileUnit(DIG.getCompileUnit());
processType(DIG.getType());
}
}
}
/// processLocation - Process DILocation.
void DebugInfoFinder::processLocation(DILocation Loc) {
if (Loc.isNull()) return;
DIScope S(Loc.getScope().getNode());
if (S.isNull()) return;
if (S.isCompileUnit())
addCompileUnit(DICompileUnit(S.getNode()));
else if (S.isSubprogram())
processSubprogram(DISubprogram(S.getNode()));
else if (S.isLexicalBlock())
processLexicalBlock(DILexicalBlock(S.getNode()));
processLocation(Loc.getOrigLocation());
}
/// processType - Process DIType.
void DebugInfoFinder::processType(DIType DT) {
if (!addType(DT))
return;
addCompileUnit(DT.getCompileUnit());
if (DT.isCompositeType()) {
DICompositeType DCT(DT.getNode());
processType(DCT.getTypeDerivedFrom());
DIArray DA = DCT.getTypeArray();
if (!DA.isNull())
for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
DIDescriptor D = DA.getElement(i);
DIType TyE = DIType(D.getNode());
if (!TyE.isNull())
processType(TyE);
else
processSubprogram(DISubprogram(D.getNode()));
}
} else if (DT.isDerivedType()) {
DIDerivedType DDT(DT.getNode());
if (!DDT.isNull())
processType(DDT.getTypeDerivedFrom());
}
}
/// processLexicalBlock
void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
if (LB.isNull())
return;
DIScope Context = LB.getContext();
if (Context.isLexicalBlock())
return processLexicalBlock(DILexicalBlock(Context.getNode()));
else
return processSubprogram(DISubprogram(Context.getNode()));
}
/// processSubprogram - Process DISubprogram.
void DebugInfoFinder::processSubprogram(DISubprogram SP) {
if (SP.isNull())
return;
if (!addSubprogram(SP))
return;
addCompileUnit(SP.getCompileUnit());
processType(SP.getType());
}
/// processDeclare - Process DbgDeclareInst.
void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
DIVariable DV(cast<MDNode>(DDI->getVariable()));
if (DV.isNull())
return;
if (!NodesSeen.insert(DV.getNode()))
return;
addCompileUnit(DV.getCompileUnit());
processType(DV.getType());
}
/// addType - Add type into Tys.
bool DebugInfoFinder::addType(DIType DT) {
if (DT.isNull())
return false;
if (!NodesSeen.insert(DT.getNode()))
return false;
TYs.push_back(DT.getNode());
return true;
}
/// addCompileUnit - Add compile unit into CUs.
bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
if (CU.isNull())
return false;
if (!NodesSeen.insert(CU.getNode()))
return false;
CUs.push_back(CU.getNode());
return true;
}
/// addGlobalVariable - Add global variable into GVs.
bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
if (DIG.isNull())
return false;
if (!NodesSeen.insert(DIG.getNode()))
return false;
GVs.push_back(DIG.getNode());
return true;
}
// addSubprogram - Add subprgoram into SPs.
bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
if (SP.isNull())
return false;
if (!NodesSeen.insert(SP.getNode()))
return false;
SPs.push_back(SP.getNode());
return true;
}
/// Find the debug info descriptor corresponding to this global variable.
static Value *findDbgGlobalDeclare(GlobalVariable *V) {
const Module *M = V->getParent();
NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv");
if (!NMD)
return 0;
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
DIGlobalVariable DIG(cast_or_null<MDNode>(NMD->getOperand(i)));
if (DIG.isNull())
continue;
if (DIG.getGlobal() == V)
return DIG.getNode();
}
return 0;
}
/// Finds the llvm.dbg.declare intrinsic corresponding to this value if any.
/// It looks through pointer casts too.
static const DbgDeclareInst *findDbgDeclare(const Value *V) {
V = V->stripPointerCasts();
if (!isa<Instruction>(V) && !isa<Argument>(V))
return 0;
const Function *F = NULL;
if (const Instruction *I = dyn_cast<Instruction>(V))
F = I->getParent()->getParent();
else if (const Argument *A = dyn_cast<Argument>(V))
F = A->getParent();
for (Function::const_iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI)
for (BasicBlock::const_iterator BI = (*FI).begin(), BE = (*FI).end();
BI != BE; ++BI)
if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
if (DDI->getAddress() == V)
return DDI;
return 0;
}
bool llvm::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<MDNode>(DIGV));
StringRef D = Var.getDisplayName();
if (!D.empty())
DisplayName = D;
LineNo = Var.getLineNumber();
Unit = Var.getCompileUnit();
TypeD = Var.getType();
} else {
const DbgDeclareInst *DDI = findDbgDeclare(V);
if (!DDI) return false;
DIVariable Var(cast<MDNode>(DDI->getVariable()));
StringRef D = Var.getName();
if (!D.empty())
DisplayName = D;
LineNo = Var.getLineNumber();
Unit = Var.getCompileUnit();
TypeD = Var.getType();
}
StringRef T = TypeD.getName();
if (!T.empty())
Type = T;
StringRef F = Unit.getFilename();
if (!F.empty())
File = F;
StringRef D = Unit.getDirectory();
if (!D.empty())
Dir = D;
return true;
}
/// ExtractDebugLocation - Extract debug location information
/// from DILocation.
DebugLoc llvm::ExtractDebugLocation(DILocation &Loc,
DebugLocTracker &DebugLocInfo) {
DenseMap<MDNode *, unsigned>::iterator II
= DebugLocInfo.DebugIdMap.find(Loc.getNode());
if (II != DebugLocInfo.DebugIdMap.end())
return DebugLoc::get(II->second);
// Add a new location entry.
unsigned Id = DebugLocInfo.DebugLocations.size();
DebugLocInfo.DebugLocations.push_back(Loc.getNode());
DebugLocInfo.DebugIdMap[Loc.getNode()] = Id;
return DebugLoc::get(Id);
}
/// getDISubprogram - Find subprogram that is enclosing this scope.
DISubprogram llvm::getDISubprogram(MDNode *Scope) {
DIDescriptor D(Scope);
if (D.isNull())
return DISubprogram();
if (D.isCompileUnit())
return DISubprogram();
if (D.isSubprogram())
return DISubprogram(Scope);
if (D.isLexicalBlock())
return getDISubprogram(DILexicalBlock(Scope).getContext().getNode());
return DISubprogram();
}
/// getDICompositeType - Find underlying composite type.
DICompositeType llvm::getDICompositeType(DIType T) {
if (T.isNull())
return DICompositeType();
if (T.isCompositeType())
return DICompositeType(T.getNode());
if (T.isDerivedType())
return getDICompositeType(DIDerivedType(T.getNode()).getTypeDerivedFrom());
return DICompositeType();
}
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