llvm-6502/lib/IR/DebugInfoMetadata.cpp
2015-04-07 03:49:59 +00:00

491 lines
21 KiB
C++

//===- DebugInfoMetadata.cpp - Implement debug info metadata --------------===//
//
// 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 debug info Metadata classes.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/DebugInfoMetadata.h"
#include "LLVMContextImpl.h"
#include "MetadataImpl.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/IR/Function.h"
using namespace llvm;
MDLocation::MDLocation(LLVMContext &C, StorageType Storage, unsigned Line,
unsigned Column, ArrayRef<Metadata *> MDs)
: MDNode(C, MDLocationKind, Storage, MDs) {
assert((MDs.size() == 1 || MDs.size() == 2) &&
"Expected a scope and optional inlined-at");
// Set line and column.
assert(Column < (1u << 16) && "Expected 16-bit column");
SubclassData32 = Line;
SubclassData16 = Column;
}
static void adjustColumn(unsigned &Column) {
// Set to unknown on overflow. We only have 16 bits to play with here.
if (Column >= (1u << 16))
Column = 0;
}
MDLocation *MDLocation::getImpl(LLVMContext &Context, unsigned Line,
unsigned Column, Metadata *Scope,
Metadata *InlinedAt, StorageType Storage,
bool ShouldCreate) {
// Fixup column.
adjustColumn(Column);
assert(Scope && "Expected scope");
if (Storage == Uniqued) {
if (auto *N =
getUniqued(Context.pImpl->MDLocations,
MDLocationInfo::KeyTy(Line, Column, Scope, InlinedAt)))
return N;
if (!ShouldCreate)
return nullptr;
} else {
assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
}
SmallVector<Metadata *, 2> Ops;
Ops.push_back(Scope);
if (InlinedAt)
Ops.push_back(InlinedAt);
return storeImpl(new (Ops.size())
MDLocation(Context, Storage, Line, Column, Ops),
Storage, Context.pImpl->MDLocations);
}
unsigned DebugNode::getFlag(StringRef Flag) {
return StringSwitch<unsigned>(Flag)
#define HANDLE_DI_FLAG(ID, NAME) .Case("DIFlag" #NAME, Flag##NAME)
#include "llvm/IR/DebugInfoFlags.def"
.Default(0);
}
const char *DebugNode::getFlagString(unsigned Flag) {
switch (Flag) {
default:
return "";
#define HANDLE_DI_FLAG(ID, NAME) \
case Flag##NAME: \
return "DIFlag" #NAME;
#include "llvm/IR/DebugInfoFlags.def"
}
}
unsigned DebugNode::splitFlags(unsigned Flags,
SmallVectorImpl<unsigned> &SplitFlags) {
// Accessibility flags need to be specially handled, since they're packed
// together.
if (unsigned A = Flags & FlagAccessibility) {
if (A == FlagPrivate)
SplitFlags.push_back(FlagPrivate);
else if (A == FlagProtected)
SplitFlags.push_back(FlagProtected);
else
SplitFlags.push_back(FlagPublic);
Flags &= ~A;
}
#define HANDLE_DI_FLAG(ID, NAME) \
if (unsigned Bit = Flags & ID) { \
SplitFlags.push_back(Bit); \
Flags &= ~Bit; \
}
#include "llvm/IR/DebugInfoFlags.def"
return Flags;
}
static StringRef getString(const MDString *S) {
if (S)
return S->getString();
return StringRef();
}
#ifndef NDEBUG
static bool isCanonical(const MDString *S) {
return !S || !S->getString().empty();
}
#endif
GenericDebugNode *GenericDebugNode::getImpl(LLVMContext &Context, unsigned Tag,
MDString *Header,
ArrayRef<Metadata *> DwarfOps,
StorageType Storage,
bool ShouldCreate) {
unsigned Hash = 0;
if (Storage == Uniqued) {
GenericDebugNodeInfo::KeyTy Key(Tag, getString(Header), DwarfOps);
if (auto *N = getUniqued(Context.pImpl->GenericDebugNodes, Key))
return N;
if (!ShouldCreate)
return nullptr;
Hash = Key.getHash();
} else {
assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
}
// Use a nullptr for empty headers.
assert(isCanonical(Header) && "Expected canonical MDString");
Metadata *PreOps[] = {Header};
return storeImpl(new (DwarfOps.size() + 1) GenericDebugNode(
Context, Storage, Hash, Tag, PreOps, DwarfOps),
Storage, Context.pImpl->GenericDebugNodes);
}
void GenericDebugNode::recalculateHash() {
setHash(GenericDebugNodeInfo::KeyTy::calculateHash(this));
}
#define UNWRAP_ARGS_IMPL(...) __VA_ARGS__
#define UNWRAP_ARGS(ARGS) UNWRAP_ARGS_IMPL ARGS
#define DEFINE_GETIMPL_LOOKUP(CLASS, ARGS) \
do { \
if (Storage == Uniqued) { \
if (auto *N = getUniqued(Context.pImpl->CLASS##s, \
CLASS##Info::KeyTy(UNWRAP_ARGS(ARGS)))) \
return N; \
if (!ShouldCreate) \
return nullptr; \
} else { \
assert(ShouldCreate && \
"Expected non-uniqued nodes to always be created"); \
} \
} while (false)
#define DEFINE_GETIMPL_STORE(CLASS, ARGS, OPS) \
return storeImpl(new (ArrayRef<Metadata *>(OPS).size()) \
CLASS(Context, Storage, UNWRAP_ARGS(ARGS), OPS), \
Storage, Context.pImpl->CLASS##s)
#define DEFINE_GETIMPL_STORE_NO_OPS(CLASS, ARGS) \
return storeImpl(new (0u) CLASS(Context, Storage, UNWRAP_ARGS(ARGS)), \
Storage, Context.pImpl->CLASS##s)
#define DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(CLASS, OPS) \
return storeImpl(new (ArrayRef<Metadata *>(OPS).size()) \
CLASS(Context, Storage, OPS), \
Storage, Context.pImpl->CLASS##s)
MDSubrange *MDSubrange::getImpl(LLVMContext &Context, int64_t Count, int64_t Lo,
StorageType Storage, bool ShouldCreate) {
DEFINE_GETIMPL_LOOKUP(MDSubrange, (Count, Lo));
DEFINE_GETIMPL_STORE_NO_OPS(MDSubrange, (Count, Lo));
}
MDEnumerator *MDEnumerator::getImpl(LLVMContext &Context, int64_t Value,
MDString *Name, StorageType Storage,
bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDEnumerator, (Value, getString(Name)));
Metadata *Ops[] = {Name};
DEFINE_GETIMPL_STORE(MDEnumerator, (Value), Ops);
}
MDBasicType *MDBasicType::getImpl(LLVMContext &Context, unsigned Tag,
MDString *Name, uint64_t SizeInBits,
uint64_t AlignInBits, unsigned Encoding,
StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(
MDBasicType, (Tag, getString(Name), SizeInBits, AlignInBits, Encoding));
Metadata *Ops[] = {nullptr, nullptr, Name};
DEFINE_GETIMPL_STORE(MDBasicType, (Tag, SizeInBits, AlignInBits, Encoding),
Ops);
}
MDDerivedType *MDDerivedType::getImpl(
LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
uint64_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
Metadata *ExtraData, StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDDerivedType, (Tag, getString(Name), File, Line, Scope,
BaseType, SizeInBits, AlignInBits,
OffsetInBits, Flags, ExtraData));
Metadata *Ops[] = {File, Scope, Name, BaseType, ExtraData};
DEFINE_GETIMPL_STORE(
MDDerivedType, (Tag, Line, SizeInBits, AlignInBits, OffsetInBits, Flags),
Ops);
}
MDCompositeType *MDCompositeType::getImpl(
LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
uint64_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
Metadata *Elements, unsigned RuntimeLang, Metadata *VTableHolder,
Metadata *TemplateParams, MDString *Identifier, StorageType Storage,
bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDCompositeType,
(Tag, getString(Name), File, Line, Scope, BaseType,
SizeInBits, AlignInBits, OffsetInBits, Flags, Elements,
RuntimeLang, VTableHolder, TemplateParams,
getString(Identifier)));
Metadata *Ops[] = {File, Scope, Name, BaseType,
Elements, VTableHolder, TemplateParams, Identifier};
DEFINE_GETIMPL_STORE(MDCompositeType, (Tag, Line, RuntimeLang, SizeInBits,
AlignInBits, OffsetInBits, Flags),
Ops);
}
MDSubroutineType *MDSubroutineType::getImpl(LLVMContext &Context,
unsigned Flags, Metadata *TypeArray,
StorageType Storage,
bool ShouldCreate) {
DEFINE_GETIMPL_LOOKUP(MDSubroutineType, (Flags, TypeArray));
Metadata *Ops[] = {nullptr, nullptr, nullptr, nullptr,
TypeArray, nullptr, nullptr, nullptr};
DEFINE_GETIMPL_STORE(MDSubroutineType, (Flags), Ops);
}
MDFile *MDFile::getImpl(LLVMContext &Context, MDString *Filename,
MDString *Directory, StorageType Storage,
bool ShouldCreate) {
assert(isCanonical(Filename) && "Expected canonical MDString");
assert(isCanonical(Directory) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDFile, (getString(Filename), getString(Directory)));
Metadata *Ops[] = {Filename, Directory};
DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(MDFile, Ops);
}
MDCompileUnit *MDCompileUnit::getImpl(
LLVMContext &Context, unsigned SourceLanguage, Metadata *File,
MDString *Producer, bool IsOptimized, MDString *Flags,
unsigned RuntimeVersion, MDString *SplitDebugFilename,
unsigned EmissionKind, Metadata *EnumTypes, Metadata *RetainedTypes,
Metadata *Subprograms, Metadata *GlobalVariables,
Metadata *ImportedEntities, StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Producer) && "Expected canonical MDString");
assert(isCanonical(Flags) && "Expected canonical MDString");
assert(isCanonical(SplitDebugFilename) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(
MDCompileUnit,
(SourceLanguage, File, getString(Producer), IsOptimized, getString(Flags),
RuntimeVersion, getString(SplitDebugFilename), EmissionKind, EnumTypes,
RetainedTypes, Subprograms, GlobalVariables, ImportedEntities));
Metadata *Ops[] = {File, Producer, Flags, SplitDebugFilename, EnumTypes,
RetainedTypes, Subprograms, GlobalVariables,
ImportedEntities};
DEFINE_GETIMPL_STORE(
MDCompileUnit,
(SourceLanguage, IsOptimized, RuntimeVersion, EmissionKind), Ops);
}
MDSubprogram *MDLocalScope::getSubprogram() const {
if (auto *Block = dyn_cast<MDLexicalBlockBase>(this))
return Block->getScope()->getSubprogram();
return const_cast<MDSubprogram *>(cast<MDSubprogram>(this));
}
MDSubprogram *MDSubprogram::getImpl(
LLVMContext &Context, Metadata *Scope, MDString *Name,
MDString *LinkageName, Metadata *File, unsigned Line, Metadata *Type,
bool IsLocalToUnit, bool IsDefinition, unsigned ScopeLine,
Metadata *ContainingType, unsigned Virtuality, unsigned VirtualIndex,
unsigned Flags, bool IsOptimized, Metadata *Function,
Metadata *TemplateParams, Metadata *Declaration, Metadata *Variables,
StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
assert(isCanonical(LinkageName) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDSubprogram,
(Scope, getString(Name), getString(LinkageName), File,
Line, Type, IsLocalToUnit, IsDefinition, ScopeLine,
ContainingType, Virtuality, VirtualIndex, Flags,
IsOptimized, Function, TemplateParams, Declaration,
Variables));
Metadata *Ops[] = {File, Scope, Name, Name,
LinkageName, Type, ContainingType, Function,
TemplateParams, Declaration, Variables};
DEFINE_GETIMPL_STORE(MDSubprogram,
(Line, ScopeLine, Virtuality, VirtualIndex, Flags,
IsLocalToUnit, IsDefinition, IsOptimized),
Ops);
}
void MDSubprogram::replaceFunction(Function *F) {
replaceFunction(F ? ConstantAsMetadata::get(F)
: static_cast<ConstantAsMetadata *>(nullptr));
}
MDLexicalBlock *MDLexicalBlock::getImpl(LLVMContext &Context, Metadata *Scope,
Metadata *File, unsigned Line,
unsigned Column, StorageType Storage,
bool ShouldCreate) {
assert(Scope && "Expected scope");
DEFINE_GETIMPL_LOOKUP(MDLexicalBlock, (Scope, File, Line, Column));
Metadata *Ops[] = {File, Scope};
DEFINE_GETIMPL_STORE(MDLexicalBlock, (Line, Column), Ops);
}
MDLexicalBlockFile *MDLexicalBlockFile::getImpl(LLVMContext &Context,
Metadata *Scope, Metadata *File,
unsigned Discriminator,
StorageType Storage,
bool ShouldCreate) {
assert(Scope && "Expected scope");
DEFINE_GETIMPL_LOOKUP(MDLexicalBlockFile, (Scope, File, Discriminator));
Metadata *Ops[] = {File, Scope};
DEFINE_GETIMPL_STORE(MDLexicalBlockFile, (Discriminator), Ops);
}
MDNamespace *MDNamespace::getImpl(LLVMContext &Context, Metadata *Scope,
Metadata *File, MDString *Name, unsigned Line,
StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDNamespace, (Scope, File, getString(Name), Line));
Metadata *Ops[] = {File, Scope, Name};
DEFINE_GETIMPL_STORE(MDNamespace, (Line), Ops);
}
MDTemplateTypeParameter *MDTemplateTypeParameter::getImpl(LLVMContext &Context,
MDString *Name,
Metadata *Type,
StorageType Storage,
bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDTemplateTypeParameter, (getString(Name), Type));
Metadata *Ops[] = {Name, Type};
DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(MDTemplateTypeParameter, Ops);
}
MDTemplateValueParameter *MDTemplateValueParameter::getImpl(
LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *Type,
Metadata *Value, StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDTemplateValueParameter,
(Tag, getString(Name), Type, Value));
Metadata *Ops[] = {Name, Type, Value};
DEFINE_GETIMPL_STORE(MDTemplateValueParameter, (Tag), Ops);
}
MDGlobalVariable *
MDGlobalVariable::getImpl(LLVMContext &Context, Metadata *Scope, MDString *Name,
MDString *LinkageName, Metadata *File, unsigned Line,
Metadata *Type, bool IsLocalToUnit, bool IsDefinition,
Metadata *Variable,
Metadata *StaticDataMemberDeclaration,
StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
assert(isCanonical(LinkageName) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDGlobalVariable,
(Scope, getString(Name), getString(LinkageName), File,
Line, Type, IsLocalToUnit, IsDefinition, Variable,
StaticDataMemberDeclaration));
Metadata *Ops[] = {Scope, Name, File, Type,
Name, LinkageName, Variable, StaticDataMemberDeclaration};
DEFINE_GETIMPL_STORE(MDGlobalVariable, (Line, IsLocalToUnit, IsDefinition),
Ops);
}
MDLocalVariable *MDLocalVariable::getImpl(
LLVMContext &Context, unsigned Tag, Metadata *Scope, MDString *Name,
Metadata *File, unsigned Line, Metadata *Type, unsigned Arg, unsigned Flags,
Metadata *InlinedAt, StorageType Storage, bool ShouldCreate) {
// Truncate Arg to 8 bits.
//
// FIXME: This is gross (and should be changed to an assert or removed), but
// it matches historical behaviour for now.
Arg &= (1u << 8) - 1;
assert(Scope && "Expected scope");
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDLocalVariable, (Tag, Scope, getString(Name), File,
Line, Type, Arg, Flags, InlinedAt));
Metadata *Ops[] = {Scope, Name, File, Type, InlinedAt};
DEFINE_GETIMPL_STORE(MDLocalVariable, (Tag, Line, Arg, Flags), Ops);
}
MDExpression *MDExpression::getImpl(LLVMContext &Context,
ArrayRef<uint64_t> Elements,
StorageType Storage, bool ShouldCreate) {
DEFINE_GETIMPL_LOOKUP(MDExpression, (Elements));
DEFINE_GETIMPL_STORE_NO_OPS(MDExpression, (Elements));
}
unsigned MDExpression::ExprOperand::getSize() const {
switch (getOp()) {
case dwarf::DW_OP_bit_piece:
return 3;
case dwarf::DW_OP_plus:
return 2;
default:
return 1;
}
}
bool MDExpression::isValid() const {
for (auto I = expr_op_begin(), E = expr_op_end(); I != E; ++I) {
// Check that there's space for the operand.
if (I->get() + I->getSize() > E->get())
return false;
// Check that the operand is valid.
switch (I->getOp()) {
default:
return false;
case dwarf::DW_OP_bit_piece:
// Piece expressions must be at the end.
return I->get() + I->getSize() == E->get();
case dwarf::DW_OP_plus:
case dwarf::DW_OP_deref:
break;
}
}
return true;
}
bool MDExpression::isBitPiece() const {
assert(isValid() && "Expected valid expression");
if (unsigned N = getNumElements())
if (N >= 3)
return getElement(N - 3) == dwarf::DW_OP_bit_piece;
return false;
}
uint64_t MDExpression::getBitPieceOffset() const {
assert(isBitPiece() && "Expected bit piece");
return getElement(getNumElements() - 2);
}
uint64_t MDExpression::getBitPieceSize() const {
assert(isBitPiece() && "Expected bit piece");
return getElement(getNumElements() - 1);
}
MDObjCProperty *MDObjCProperty::getImpl(
LLVMContext &Context, MDString *Name, Metadata *File, unsigned Line,
MDString *GetterName, MDString *SetterName, unsigned Attributes,
Metadata *Type, StorageType Storage, bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
assert(isCanonical(GetterName) && "Expected canonical MDString");
assert(isCanonical(SetterName) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDObjCProperty,
(getString(Name), File, Line, getString(GetterName),
getString(SetterName), Attributes, Type));
Metadata *Ops[] = {Name, File, GetterName, SetterName, Type};
DEFINE_GETIMPL_STORE(MDObjCProperty, (Line, Attributes), Ops);
}
MDImportedEntity *MDImportedEntity::getImpl(LLVMContext &Context, unsigned Tag,
Metadata *Scope, Metadata *Entity,
unsigned Line, MDString *Name,
StorageType Storage,
bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(MDImportedEntity,
(Tag, Scope, Entity, Line, getString(Name)));
Metadata *Ops[] = {Scope, Entity, Name};
DEFINE_GETIMPL_STORE(MDImportedEntity, (Tag, Line), Ops);
}