forked from OSchip/llvm-project
560 lines
24 KiB
C++
560 lines
24 KiB
C++
//===- DebugInfoMetadata.cpp - Implement debug info metadata --------------===//
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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 debug info Metadata classes.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/DebugInfoMetadata.h"
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#include "LLVMContextImpl.h"
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#include "MetadataImpl.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/IR/Function.h"
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using namespace llvm;
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DILocation::DILocation(LLVMContext &C, StorageType Storage, unsigned Line,
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unsigned Column, ArrayRef<Metadata *> MDs)
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: MDNode(C, DILocationKind, Storage, MDs) {
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assert((MDs.size() == 1 || MDs.size() == 2) &&
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"Expected a scope and optional inlined-at");
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// Set line and column.
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assert(Column < (1u << 16) && "Expected 16-bit column");
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SubclassData32 = Line;
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SubclassData16 = Column;
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}
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static void adjustColumn(unsigned &Column) {
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// Set to unknown on overflow. We only have 16 bits to play with here.
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if (Column >= (1u << 16))
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Column = 0;
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}
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DILocation *DILocation::getImpl(LLVMContext &Context, unsigned Line,
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unsigned Column, Metadata *Scope,
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Metadata *InlinedAt, StorageType Storage,
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bool ShouldCreate) {
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// Fixup column.
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adjustColumn(Column);
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assert(Scope && "Expected scope");
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if (Storage == Uniqued) {
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if (auto *N =
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getUniqued(Context.pImpl->DILocations,
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DILocationInfo::KeyTy(Line, Column, Scope, InlinedAt)))
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return N;
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if (!ShouldCreate)
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return nullptr;
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} else {
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assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
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}
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SmallVector<Metadata *, 2> Ops;
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Ops.push_back(Scope);
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if (InlinedAt)
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Ops.push_back(InlinedAt);
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return storeImpl(new (Ops.size())
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DILocation(Context, Storage, Line, Column, Ops),
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Storage, Context.pImpl->DILocations);
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}
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unsigned DILocation::computeNewDiscriminator() const {
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// FIXME: This seems completely wrong.
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//
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// 1. If two modules are generated in the same context, then the second
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// Module will get different discriminators than it would have if it were
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// generated in its own context.
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// 2. If this function is called after round-tripping to bitcode instead of
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// before, it will give a different (and potentially incorrect!) return.
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//
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// The discriminator should instead be calculated from local information
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// where it's actually needed. This logic should be moved to
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// AddDiscriminators::runOnFunction(), where it doesn't pollute the
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// LLVMContext.
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std::pair<const char *, unsigned> Key(getFilename().data(), getLine());
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return ++getContext().pImpl->DiscriminatorTable[Key];
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}
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unsigned DINode::getFlag(StringRef Flag) {
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return StringSwitch<unsigned>(Flag)
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#define HANDLE_DI_FLAG(ID, NAME) .Case("DIFlag" #NAME, Flag##NAME)
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#include "llvm/IR/DebugInfoFlags.def"
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.Default(0);
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}
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const char *DINode::getFlagString(unsigned Flag) {
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switch (Flag) {
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default:
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return "";
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#define HANDLE_DI_FLAG(ID, NAME) \
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case Flag##NAME: \
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return "DIFlag" #NAME;
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#include "llvm/IR/DebugInfoFlags.def"
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}
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}
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unsigned DINode::splitFlags(unsigned Flags,
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SmallVectorImpl<unsigned> &SplitFlags) {
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// Accessibility flags need to be specially handled, since they're packed
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// together.
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if (unsigned A = Flags & FlagAccessibility) {
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if (A == FlagPrivate)
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SplitFlags.push_back(FlagPrivate);
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else if (A == FlagProtected)
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SplitFlags.push_back(FlagProtected);
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else
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SplitFlags.push_back(FlagPublic);
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Flags &= ~A;
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}
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#define HANDLE_DI_FLAG(ID, NAME) \
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if (unsigned Bit = Flags & ID) { \
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SplitFlags.push_back(Bit); \
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Flags &= ~Bit; \
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}
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#include "llvm/IR/DebugInfoFlags.def"
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return Flags;
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}
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DIScopeRef DIScope::getScope() const {
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if (auto *T = dyn_cast<DIType>(this))
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return T->getScope();
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if (auto *SP = dyn_cast<DISubprogram>(this))
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return SP->getScope();
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if (auto *LB = dyn_cast<DILexicalBlockBase>(this))
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return DIScopeRef(LB->getScope());
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if (auto *NS = dyn_cast<DINamespace>(this))
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return DIScopeRef(NS->getScope());
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if (auto *M = dyn_cast<DIModule>(this))
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return DIScopeRef(M->getScope());
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assert((isa<DIFile>(this) || isa<DICompileUnit>(this)) &&
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"Unhandled type of scope.");
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return nullptr;
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}
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StringRef DIScope::getName() const {
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if (auto *T = dyn_cast<DIType>(this))
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return T->getName();
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if (auto *SP = dyn_cast<DISubprogram>(this))
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return SP->getName();
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if (auto *NS = dyn_cast<DINamespace>(this))
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return NS->getName();
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if (auto *M = dyn_cast<DIModule>(this))
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return M->getName();
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assert((isa<DILexicalBlockBase>(this) || isa<DIFile>(this) ||
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isa<DICompileUnit>(this)) &&
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"Unhandled type of scope.");
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return "";
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}
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static StringRef getString(const MDString *S) {
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if (S)
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return S->getString();
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return StringRef();
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}
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#ifndef NDEBUG
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static bool isCanonical(const MDString *S) {
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return !S || !S->getString().empty();
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}
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#endif
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GenericDINode *GenericDINode::getImpl(LLVMContext &Context, unsigned Tag,
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MDString *Header,
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ArrayRef<Metadata *> DwarfOps,
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StorageType Storage, bool ShouldCreate) {
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unsigned Hash = 0;
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if (Storage == Uniqued) {
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GenericDINodeInfo::KeyTy Key(Tag, getString(Header), DwarfOps);
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if (auto *N = getUniqued(Context.pImpl->GenericDINodes, Key))
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return N;
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if (!ShouldCreate)
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return nullptr;
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Hash = Key.getHash();
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} else {
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assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
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}
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// Use a nullptr for empty headers.
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assert(isCanonical(Header) && "Expected canonical MDString");
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Metadata *PreOps[] = {Header};
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return storeImpl(new (DwarfOps.size() + 1) GenericDINode(
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Context, Storage, Hash, Tag, PreOps, DwarfOps),
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Storage, Context.pImpl->GenericDINodes);
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}
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void GenericDINode::recalculateHash() {
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setHash(GenericDINodeInfo::KeyTy::calculateHash(this));
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}
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#define UNWRAP_ARGS_IMPL(...) __VA_ARGS__
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#define UNWRAP_ARGS(ARGS) UNWRAP_ARGS_IMPL ARGS
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#define DEFINE_GETIMPL_LOOKUP(CLASS, ARGS) \
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do { \
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if (Storage == Uniqued) { \
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if (auto *N = getUniqued(Context.pImpl->CLASS##s, \
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CLASS##Info::KeyTy(UNWRAP_ARGS(ARGS)))) \
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return N; \
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if (!ShouldCreate) \
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return nullptr; \
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} else { \
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assert(ShouldCreate && \
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"Expected non-uniqued nodes to always be created"); \
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} \
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} while (false)
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#define DEFINE_GETIMPL_STORE(CLASS, ARGS, OPS) \
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return storeImpl(new (ArrayRef<Metadata *>(OPS).size()) \
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CLASS(Context, Storage, UNWRAP_ARGS(ARGS), OPS), \
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Storage, Context.pImpl->CLASS##s)
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#define DEFINE_GETIMPL_STORE_NO_OPS(CLASS, ARGS) \
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return storeImpl(new (0u) CLASS(Context, Storage, UNWRAP_ARGS(ARGS)), \
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Storage, Context.pImpl->CLASS##s)
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#define DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(CLASS, OPS) \
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return storeImpl(new (ArrayRef<Metadata *>(OPS).size()) \
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CLASS(Context, Storage, OPS), \
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Storage, Context.pImpl->CLASS##s)
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DISubrange *DISubrange::getImpl(LLVMContext &Context, int64_t Count, int64_t Lo,
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StorageType Storage, bool ShouldCreate) {
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DEFINE_GETIMPL_LOOKUP(DISubrange, (Count, Lo));
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DEFINE_GETIMPL_STORE_NO_OPS(DISubrange, (Count, Lo));
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}
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DIEnumerator *DIEnumerator::getImpl(LLVMContext &Context, int64_t Value,
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MDString *Name, StorageType Storage,
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bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DIEnumerator, (Value, getString(Name)));
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Metadata *Ops[] = {Name};
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DEFINE_GETIMPL_STORE(DIEnumerator, (Value), Ops);
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}
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DIBasicType *DIBasicType::getImpl(LLVMContext &Context, unsigned Tag,
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MDString *Name, uint64_t SizeInBits,
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uint64_t AlignInBits, unsigned Encoding,
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StorageType Storage, bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(
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DIBasicType, (Tag, getString(Name), SizeInBits, AlignInBits, Encoding));
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Metadata *Ops[] = {nullptr, nullptr, Name};
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DEFINE_GETIMPL_STORE(DIBasicType, (Tag, SizeInBits, AlignInBits, Encoding),
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Ops);
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}
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DIDerivedType *DIDerivedType::getImpl(
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LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
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unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
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uint64_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
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Metadata *ExtraData, StorageType Storage, bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DIDerivedType, (Tag, getString(Name), File, Line, Scope,
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BaseType, SizeInBits, AlignInBits,
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OffsetInBits, Flags, ExtraData));
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Metadata *Ops[] = {File, Scope, Name, BaseType, ExtraData};
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DEFINE_GETIMPL_STORE(
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DIDerivedType, (Tag, Line, SizeInBits, AlignInBits, OffsetInBits, Flags),
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Ops);
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}
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DICompositeType *DICompositeType::getImpl(
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LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
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unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
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uint64_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
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Metadata *Elements, unsigned RuntimeLang, Metadata *VTableHolder,
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Metadata *TemplateParams, MDString *Identifier, StorageType Storage,
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bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DICompositeType,
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(Tag, getString(Name), File, Line, Scope, BaseType,
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SizeInBits, AlignInBits, OffsetInBits, Flags, Elements,
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RuntimeLang, VTableHolder, TemplateParams,
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getString(Identifier)));
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Metadata *Ops[] = {File, Scope, Name, BaseType,
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Elements, VTableHolder, TemplateParams, Identifier};
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DEFINE_GETIMPL_STORE(DICompositeType, (Tag, Line, RuntimeLang, SizeInBits,
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AlignInBits, OffsetInBits, Flags),
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Ops);
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}
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DISubroutineType *DISubroutineType::getImpl(LLVMContext &Context,
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unsigned Flags, Metadata *TypeArray,
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StorageType Storage,
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bool ShouldCreate) {
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DEFINE_GETIMPL_LOOKUP(DISubroutineType, (Flags, TypeArray));
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Metadata *Ops[] = {nullptr, nullptr, nullptr, TypeArray};
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DEFINE_GETIMPL_STORE(DISubroutineType, (Flags), Ops);
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}
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DIFile *DIFile::getImpl(LLVMContext &Context, MDString *Filename,
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MDString *Directory, StorageType Storage,
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bool ShouldCreate) {
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assert(isCanonical(Filename) && "Expected canonical MDString");
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assert(isCanonical(Directory) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DIFile, (getString(Filename), getString(Directory)));
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Metadata *Ops[] = {Filename, Directory};
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DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(DIFile, Ops);
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}
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DICompileUnit *DICompileUnit::getImpl(
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LLVMContext &Context, unsigned SourceLanguage, Metadata *File,
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MDString *Producer, bool IsOptimized, MDString *Flags,
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unsigned RuntimeVersion, MDString *SplitDebugFilename,
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unsigned EmissionKind, Metadata *EnumTypes, Metadata *RetainedTypes,
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Metadata *Subprograms, Metadata *GlobalVariables,
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Metadata *ImportedEntities, uint64_t DWOId,
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StorageType Storage, bool ShouldCreate) {
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assert(Storage != Uniqued && "Cannot unique DICompileUnit");
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assert(isCanonical(Producer) && "Expected canonical MDString");
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assert(isCanonical(Flags) && "Expected canonical MDString");
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assert(isCanonical(SplitDebugFilename) && "Expected canonical MDString");
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Metadata *Ops[] = {File, Producer, Flags, SplitDebugFilename, EnumTypes,
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RetainedTypes, Subprograms, GlobalVariables,
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ImportedEntities};
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return storeImpl(new (ArrayRef<Metadata *>(Ops).size()) DICompileUnit(
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Context, Storage, SourceLanguage, IsOptimized,
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RuntimeVersion, EmissionKind, DWOId, Ops),
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Storage);
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}
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DISubprogram *DILocalScope::getSubprogram() const {
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if (auto *Block = dyn_cast<DILexicalBlockBase>(this))
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return Block->getScope()->getSubprogram();
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return const_cast<DISubprogram *>(cast<DISubprogram>(this));
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}
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DISubprogram *DISubprogram::getImpl(
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LLVMContext &Context, Metadata *Scope, MDString *Name,
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MDString *LinkageName, Metadata *File, unsigned Line, Metadata *Type,
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bool IsLocalToUnit, bool IsDefinition, unsigned ScopeLine,
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Metadata *ContainingType, unsigned Virtuality, unsigned VirtualIndex,
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unsigned Flags, bool IsOptimized, Metadata *TemplateParams,
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Metadata *Declaration, Metadata *Variables, StorageType Storage,
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bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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assert(isCanonical(LinkageName) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DISubprogram,
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(Scope, getString(Name), getString(LinkageName), File,
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Line, Type, IsLocalToUnit, IsDefinition, ScopeLine,
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ContainingType, Virtuality, VirtualIndex, Flags,
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IsOptimized, TemplateParams, Declaration, Variables));
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Metadata *Ops[] = {File, Scope, Name, Name,
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LinkageName, Type, ContainingType, TemplateParams,
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Declaration, Variables};
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DEFINE_GETIMPL_STORE(DISubprogram,
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(Line, ScopeLine, Virtuality, VirtualIndex, Flags,
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IsLocalToUnit, IsDefinition, IsOptimized),
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Ops);
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}
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bool DISubprogram::describes(const Function *F) const {
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assert(F && "Invalid function");
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if (F->getSubprogram() == this)
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return true;
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StringRef Name = getLinkageName();
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if (Name.empty())
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Name = getName();
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return F->getName() == Name;
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}
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DILexicalBlock *DILexicalBlock::getImpl(LLVMContext &Context, Metadata *Scope,
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Metadata *File, unsigned Line,
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unsigned Column, StorageType Storage,
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bool ShouldCreate) {
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// Fixup column.
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adjustColumn(Column);
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assert(Scope && "Expected scope");
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DEFINE_GETIMPL_LOOKUP(DILexicalBlock, (Scope, File, Line, Column));
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Metadata *Ops[] = {File, Scope};
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DEFINE_GETIMPL_STORE(DILexicalBlock, (Line, Column), Ops);
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}
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DILexicalBlockFile *DILexicalBlockFile::getImpl(LLVMContext &Context,
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Metadata *Scope, Metadata *File,
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unsigned Discriminator,
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StorageType Storage,
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bool ShouldCreate) {
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assert(Scope && "Expected scope");
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DEFINE_GETIMPL_LOOKUP(DILexicalBlockFile, (Scope, File, Discriminator));
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Metadata *Ops[] = {File, Scope};
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DEFINE_GETIMPL_STORE(DILexicalBlockFile, (Discriminator), Ops);
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}
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DINamespace *DINamespace::getImpl(LLVMContext &Context, Metadata *Scope,
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Metadata *File, MDString *Name, unsigned Line,
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StorageType Storage, bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DINamespace, (Scope, File, getString(Name), Line));
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Metadata *Ops[] = {File, Scope, Name};
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DEFINE_GETIMPL_STORE(DINamespace, (Line), Ops);
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}
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DIModule *DIModule::getImpl(LLVMContext &Context, Metadata *Scope,
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MDString *Name, MDString *ConfigurationMacros,
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MDString *IncludePath, MDString *ISysRoot,
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StorageType Storage, bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DIModule,
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(Scope, getString(Name), getString(ConfigurationMacros),
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getString(IncludePath), getString(ISysRoot)));
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Metadata *Ops[] = {Scope, Name, ConfigurationMacros, IncludePath, ISysRoot};
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DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(DIModule, Ops);
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}
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DITemplateTypeParameter *DITemplateTypeParameter::getImpl(LLVMContext &Context,
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MDString *Name,
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Metadata *Type,
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StorageType Storage,
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bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DITemplateTypeParameter, (getString(Name), Type));
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Metadata *Ops[] = {Name, Type};
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DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(DITemplateTypeParameter, Ops);
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}
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DITemplateValueParameter *DITemplateValueParameter::getImpl(
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LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *Type,
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Metadata *Value, StorageType Storage, bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DITemplateValueParameter,
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(Tag, getString(Name), Type, Value));
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Metadata *Ops[] = {Name, Type, Value};
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DEFINE_GETIMPL_STORE(DITemplateValueParameter, (Tag), Ops);
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}
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DIGlobalVariable *
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DIGlobalVariable::getImpl(LLVMContext &Context, Metadata *Scope, MDString *Name,
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MDString *LinkageName, Metadata *File, unsigned Line,
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Metadata *Type, bool IsLocalToUnit, bool IsDefinition,
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Metadata *Variable,
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Metadata *StaticDataMemberDeclaration,
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StorageType Storage, bool ShouldCreate) {
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assert(isCanonical(Name) && "Expected canonical MDString");
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assert(isCanonical(LinkageName) && "Expected canonical MDString");
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DEFINE_GETIMPL_LOOKUP(DIGlobalVariable,
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(Scope, getString(Name), getString(LinkageName), File,
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Line, Type, IsLocalToUnit, IsDefinition, Variable,
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StaticDataMemberDeclaration));
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Metadata *Ops[] = {Scope, Name, File, Type,
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|
Name, LinkageName, Variable, StaticDataMemberDeclaration};
|
|
DEFINE_GETIMPL_STORE(DIGlobalVariable, (Line, IsLocalToUnit, IsDefinition),
|
|
Ops);
|
|
}
|
|
|
|
DILocalVariable *DILocalVariable::getImpl(LLVMContext &Context, Metadata *Scope,
|
|
MDString *Name, Metadata *File,
|
|
unsigned Line, Metadata *Type,
|
|
unsigned Arg, unsigned Flags,
|
|
StorageType Storage,
|
|
bool ShouldCreate) {
|
|
// 64K ought to be enough for any frontend.
|
|
assert(Arg <= UINT16_MAX && "Expected argument number to fit in 16-bits");
|
|
|
|
assert(Scope && "Expected scope");
|
|
assert(isCanonical(Name) && "Expected canonical MDString");
|
|
DEFINE_GETIMPL_LOOKUP(DILocalVariable,
|
|
(Scope, getString(Name), File, Line, Type, Arg, Flags));
|
|
Metadata *Ops[] = {Scope, Name, File, Type};
|
|
DEFINE_GETIMPL_STORE(DILocalVariable, (Line, Arg, Flags), Ops);
|
|
}
|
|
|
|
DIExpression *DIExpression::getImpl(LLVMContext &Context,
|
|
ArrayRef<uint64_t> Elements,
|
|
StorageType Storage, bool ShouldCreate) {
|
|
DEFINE_GETIMPL_LOOKUP(DIExpression, (Elements));
|
|
DEFINE_GETIMPL_STORE_NO_OPS(DIExpression, (Elements));
|
|
}
|
|
|
|
unsigned DIExpression::ExprOperand::getSize() const {
|
|
switch (getOp()) {
|
|
case dwarf::DW_OP_bit_piece:
|
|
return 3;
|
|
case dwarf::DW_OP_plus:
|
|
case dwarf::DW_OP_minus:
|
|
return 2;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
bool DIExpression::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_minus:
|
|
case dwarf::DW_OP_deref:
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool DIExpression::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 DIExpression::getBitPieceOffset() const {
|
|
assert(isBitPiece() && "Expected bit piece");
|
|
return getElement(getNumElements() - 2);
|
|
}
|
|
|
|
uint64_t DIExpression::getBitPieceSize() const {
|
|
assert(isBitPiece() && "Expected bit piece");
|
|
return getElement(getNumElements() - 1);
|
|
}
|
|
|
|
DIObjCProperty *DIObjCProperty::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(DIObjCProperty,
|
|
(getString(Name), File, Line, getString(GetterName),
|
|
getString(SetterName), Attributes, Type));
|
|
Metadata *Ops[] = {Name, File, GetterName, SetterName, Type};
|
|
DEFINE_GETIMPL_STORE(DIObjCProperty, (Line, Attributes), Ops);
|
|
}
|
|
|
|
DIImportedEntity *DIImportedEntity::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(DIImportedEntity,
|
|
(Tag, Scope, Entity, Line, getString(Name)));
|
|
Metadata *Ops[] = {Scope, Entity, Name};
|
|
DEFINE_GETIMPL_STORE(DIImportedEntity, (Tag, Line), Ops);
|
|
}
|