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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
286 lines
9.2 KiB
C++
286 lines
9.2 KiB
C++
//===- tools/dsymutil/DebugMap.cpp - Generic debug map representation -----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DebugMap.h"
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#include "BinaryHolder.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/BinaryFormat/MachO.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/Chrono.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/WithColor.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cinttypes>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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namespace llvm {
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namespace dsymutil {
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using namespace llvm::object;
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DebugMapObject::DebugMapObject(StringRef ObjectFilename,
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sys::TimePoint<std::chrono::seconds> Timestamp,
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uint8_t Type)
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: Filename(ObjectFilename), Timestamp(Timestamp), Type(Type) {}
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bool DebugMapObject::addSymbol(StringRef Name, Optional<uint64_t> ObjectAddress,
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uint64_t LinkedAddress, uint32_t Size) {
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auto InsertResult = Symbols.insert(
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std::make_pair(Name, SymbolMapping(ObjectAddress, LinkedAddress, Size)));
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if (ObjectAddress && InsertResult.second)
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AddressToMapping[*ObjectAddress] = &*InsertResult.first;
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return InsertResult.second;
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}
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void DebugMapObject::print(raw_ostream &OS) const {
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OS << getObjectFilename() << ":\n";
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// Sort the symbols in alphabetical order, like llvm-nm (and to get
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// deterministic output for testing).
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using Entry = std::pair<StringRef, SymbolMapping>;
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std::vector<Entry> Entries;
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Entries.reserve(Symbols.getNumItems());
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for (const auto &Sym : make_range(Symbols.begin(), Symbols.end()))
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Entries.push_back(std::make_pair(Sym.getKey(), Sym.getValue()));
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llvm::sort(Entries, [](const Entry &LHS, const Entry &RHS) {
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return LHS.first < RHS.first;
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});
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for (const auto &Sym : Entries) {
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if (Sym.second.ObjectAddress)
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OS << format("\t%016" PRIx64, uint64_t(*Sym.second.ObjectAddress));
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else
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OS << "\t????????????????";
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OS << format(" => %016" PRIx64 "+0x%x\t%s\n",
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uint64_t(Sym.second.BinaryAddress), uint32_t(Sym.second.Size),
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Sym.first.data());
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}
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OS << '\n';
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}
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#ifndef NDEBUG
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void DebugMapObject::dump() const { print(errs()); }
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#endif
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DebugMapObject &
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DebugMap::addDebugMapObject(StringRef ObjectFilePath,
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sys::TimePoint<std::chrono::seconds> Timestamp,
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uint8_t Type) {
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Objects.emplace_back(new DebugMapObject(ObjectFilePath, Timestamp, Type));
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return *Objects.back();
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}
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const DebugMapObject::DebugMapEntry *
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DebugMapObject::lookupSymbol(StringRef SymbolName) const {
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StringMap<SymbolMapping>::const_iterator Sym = Symbols.find(SymbolName);
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if (Sym == Symbols.end())
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return nullptr;
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return &*Sym;
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}
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const DebugMapObject::DebugMapEntry *
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DebugMapObject::lookupObjectAddress(uint64_t Address) const {
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auto Mapping = AddressToMapping.find(Address);
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if (Mapping == AddressToMapping.end())
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return nullptr;
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return Mapping->getSecond();
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}
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void DebugMap::print(raw_ostream &OS) const {
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yaml::Output yout(OS, /* Ctxt = */ nullptr, /* WrapColumn = */ 0);
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yout << const_cast<DebugMap &>(*this);
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}
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#ifndef NDEBUG
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void DebugMap::dump() const { print(errs()); }
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#endif
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namespace {
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struct YAMLContext {
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StringRef PrependPath;
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Triple BinaryTriple;
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};
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} // end anonymous namespace
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ErrorOr<std::vector<std::unique_ptr<DebugMap>>>
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DebugMap::parseYAMLDebugMap(StringRef InputFile, StringRef PrependPath,
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bool Verbose) {
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auto ErrOrFile = MemoryBuffer::getFileOrSTDIN(InputFile);
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if (auto Err = ErrOrFile.getError())
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return Err;
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YAMLContext Ctxt;
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Ctxt.PrependPath = PrependPath;
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std::unique_ptr<DebugMap> Res;
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yaml::Input yin((*ErrOrFile)->getBuffer(), &Ctxt);
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yin >> Res;
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if (auto EC = yin.error())
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return EC;
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std::vector<std::unique_ptr<DebugMap>> Result;
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Result.push_back(std::move(Res));
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return std::move(Result);
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}
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} // end namespace dsymutil
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namespace yaml {
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// Normalize/Denormalize between YAML and a DebugMapObject.
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struct MappingTraits<dsymutil::DebugMapObject>::YamlDMO {
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YamlDMO(IO &io) { Timestamp = 0; }
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YamlDMO(IO &io, dsymutil::DebugMapObject &Obj);
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dsymutil::DebugMapObject denormalize(IO &IO);
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std::string Filename;
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int64_t Timestamp;
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std::vector<dsymutil::DebugMapObject::YAMLSymbolMapping> Entries;
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};
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void MappingTraits<std::pair<std::string, DebugMapObject::SymbolMapping>>::
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mapping(IO &io, std::pair<std::string, DebugMapObject::SymbolMapping> &s) {
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io.mapRequired("sym", s.first);
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io.mapOptional("objAddr", s.second.ObjectAddress);
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io.mapRequired("binAddr", s.second.BinaryAddress);
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io.mapOptional("size", s.second.Size);
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}
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void MappingTraits<dsymutil::DebugMapObject>::mapping(
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IO &io, dsymutil::DebugMapObject &DMO) {
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MappingNormalization<YamlDMO, dsymutil::DebugMapObject> Norm(io, DMO);
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io.mapRequired("filename", Norm->Filename);
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io.mapOptional("timestamp", Norm->Timestamp);
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io.mapRequired("symbols", Norm->Entries);
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}
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void ScalarTraits<Triple>::output(const Triple &val, void *, raw_ostream &out) {
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out << val.str();
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}
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StringRef ScalarTraits<Triple>::input(StringRef scalar, void *, Triple &value) {
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value = Triple(scalar);
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return StringRef();
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}
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size_t
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SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>>::size(
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IO &io, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq) {
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return seq.size();
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}
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dsymutil::DebugMapObject &
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SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>>::element(
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IO &, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq,
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size_t index) {
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if (index >= seq.size()) {
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seq.resize(index + 1);
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seq[index].reset(new dsymutil::DebugMapObject);
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}
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return *seq[index];
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}
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void MappingTraits<dsymutil::DebugMap>::mapping(IO &io,
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dsymutil::DebugMap &DM) {
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io.mapRequired("triple", DM.BinaryTriple);
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io.mapOptional("binary-path", DM.BinaryPath);
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if (void *Ctxt = io.getContext())
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reinterpret_cast<YAMLContext *>(Ctxt)->BinaryTriple = DM.BinaryTriple;
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io.mapOptional("objects", DM.Objects);
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}
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void MappingTraits<std::unique_ptr<dsymutil::DebugMap>>::mapping(
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IO &io, std::unique_ptr<dsymutil::DebugMap> &DM) {
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if (!DM)
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DM.reset(new DebugMap());
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io.mapRequired("triple", DM->BinaryTriple);
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io.mapOptional("binary-path", DM->BinaryPath);
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if (void *Ctxt = io.getContext())
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reinterpret_cast<YAMLContext *>(Ctxt)->BinaryTriple = DM->BinaryTriple;
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io.mapOptional("objects", DM->Objects);
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}
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MappingTraits<dsymutil::DebugMapObject>::YamlDMO::YamlDMO(
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IO &io, dsymutil::DebugMapObject &Obj) {
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Filename = Obj.Filename;
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Timestamp = sys::toTimeT(Obj.getTimestamp());
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Entries.reserve(Obj.Symbols.size());
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for (auto &Entry : Obj.Symbols)
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Entries.push_back(std::make_pair(Entry.getKey(), Entry.getValue()));
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}
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dsymutil::DebugMapObject
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MappingTraits<dsymutil::DebugMapObject>::YamlDMO::denormalize(IO &IO) {
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BinaryHolder BinHolder(/* Verbose =*/false);
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const auto &Ctxt = *reinterpret_cast<YAMLContext *>(IO.getContext());
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SmallString<80> Path(Ctxt.PrependPath);
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StringMap<uint64_t> SymbolAddresses;
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sys::path::append(Path, Filename);
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auto ObjectEntry = BinHolder.getObjectEntry(Path);
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if (!ObjectEntry) {
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auto Err = ObjectEntry.takeError();
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WithColor::warning() << "Unable to open " << Path << " "
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<< toString(std::move(Err)) << '\n';
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} else {
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auto Object = ObjectEntry->getObject(Ctxt.BinaryTriple);
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if (!Object) {
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auto Err = Object.takeError();
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WithColor::warning() << "Unable to open " << Path << " "
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<< toString(std::move(Err)) << '\n';
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} else {
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for (const auto &Sym : Object->symbols()) {
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uint64_t Address = Sym.getValue();
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Expected<StringRef> Name = Sym.getName();
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if (!Name || (Sym.getFlags() &
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(SymbolRef::SF_Absolute | SymbolRef::SF_Common))) {
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// TODO: Actually report errors helpfully.
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if (!Name)
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consumeError(Name.takeError());
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continue;
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}
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SymbolAddresses[*Name] = Address;
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}
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}
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}
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dsymutil::DebugMapObject Res(Path, sys::toTimePoint(Timestamp), MachO::N_OSO);
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for (auto &Entry : Entries) {
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auto &Mapping = Entry.second;
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Optional<uint64_t> ObjAddress;
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if (Mapping.ObjectAddress)
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ObjAddress = *Mapping.ObjectAddress;
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auto AddressIt = SymbolAddresses.find(Entry.first);
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if (AddressIt != SymbolAddresses.end())
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ObjAddress = AddressIt->getValue();
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Res.addSymbol(Entry.first, ObjAddress, Mapping.BinaryAddress, Mapping.Size);
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}
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return Res;
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}
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} // end namespace yaml
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} // end namespace llvm
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