llvm-6502/tools/dsymutil/DebugMap.cpp
Rafael Espindola 7b7c81cd35 Delete UnknownAddress. It is a perfectly valid symbol value.
getSymbolValue now returns a value that in convenient for most callers:
* 0 for undefined
* symbol size for common symbols
* offset/address for symbols the rest

Code that needs something more specific can check getSymbolFlags.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241605 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-07 17:12:59 +00:00

240 lines
7.6 KiB
C++

//===- tools/dsymutil/DebugMap.cpp - Generic debug map representation -----===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DebugMap.h"
#include "BinaryHolder.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
namespace llvm {
namespace dsymutil {
using namespace llvm::object;
DebugMapObject::DebugMapObject(StringRef ObjectFilename)
: Filename(ObjectFilename) {}
bool DebugMapObject::addSymbol(StringRef Name, uint64_t ObjectAddress,
uint64_t LinkedAddress, uint32_t Size) {
auto InsertResult = Symbols.insert(
std::make_pair(Name, SymbolMapping(ObjectAddress, LinkedAddress, Size)));
if (InsertResult.second)
AddressToMapping[ObjectAddress] = &*InsertResult.first;
return InsertResult.second;
}
void DebugMapObject::print(raw_ostream &OS) const {
OS << getObjectFilename() << ":\n";
// Sort the symbols in alphabetical order, like llvm-nm (and to get
// deterministic output for testing).
typedef std::pair<StringRef, SymbolMapping> Entry;
std::vector<Entry> Entries;
Entries.reserve(Symbols.getNumItems());
for (const auto &Sym : make_range(Symbols.begin(), Symbols.end()))
Entries.push_back(std::make_pair(Sym.getKey(), Sym.getValue()));
std::sort(
Entries.begin(), Entries.end(),
[](const Entry &LHS, const Entry &RHS) { return LHS.first < RHS.first; });
for (const auto &Sym : Entries) {
OS << format("\t%016" PRIx64 " => %016" PRIx64 "+0x%x\t%s\n",
uint64_t(Sym.second.ObjectAddress),
uint64_t(Sym.second.BinaryAddress), uint32_t(Sym.second.Size),
Sym.first.data());
}
OS << '\n';
}
#ifndef NDEBUG
void DebugMapObject::dump() const { print(errs()); }
#endif
DebugMapObject &DebugMap::addDebugMapObject(StringRef ObjectFilePath) {
Objects.emplace_back(new DebugMapObject(ObjectFilePath));
return *Objects.back();
}
const DebugMapObject::DebugMapEntry *
DebugMapObject::lookupSymbol(StringRef SymbolName) const {
StringMap<SymbolMapping>::const_iterator Sym = Symbols.find(SymbolName);
if (Sym == Symbols.end())
return nullptr;
return &*Sym;
}
const DebugMapObject::DebugMapEntry *
DebugMapObject::lookupObjectAddress(uint64_t Address) const {
auto Mapping = AddressToMapping.find(Address);
if (Mapping == AddressToMapping.end())
return nullptr;
return Mapping->getSecond();
}
void DebugMap::print(raw_ostream &OS) const {
yaml::Output yout(OS, /* Ctxt = */ nullptr, /* WrapColumn = */ 0);
yout << const_cast<DebugMap &>(*this);
}
#ifndef NDEBUG
void DebugMap::dump() const { print(errs()); }
#endif
namespace {
struct YAMLContext {
StringRef PrependPath;
Triple BinaryTriple;
};
}
ErrorOr<std::unique_ptr<DebugMap>>
DebugMap::parseYAMLDebugMap(StringRef InputFile, StringRef PrependPath,
bool Verbose) {
auto ErrOrFile = MemoryBuffer::getFileOrSTDIN(InputFile);
if (auto Err = ErrOrFile.getError())
return Err;
YAMLContext Ctxt;
Ctxt.PrependPath = PrependPath;
std::unique_ptr<DebugMap> Res;
yaml::Input yin((*ErrOrFile)->getBuffer(), &Ctxt);
yin >> Res;
if (auto EC = yin.error())
return EC;
return std::move(Res);
}
}
namespace yaml {
// Normalize/Denormalize between YAML and a DebugMapObject.
struct MappingTraits<dsymutil::DebugMapObject>::YamlDMO {
YamlDMO(IO &io) {}
YamlDMO(IO &io, dsymutil::DebugMapObject &Obj);
dsymutil::DebugMapObject denormalize(IO &IO);
std::string Filename;
std::vector<dsymutil::DebugMapObject::YAMLSymbolMapping> Entries;
};
void MappingTraits<std::pair<std::string, DebugMapObject::SymbolMapping>>::
mapping(IO &io, std::pair<std::string, DebugMapObject::SymbolMapping> &s) {
io.mapRequired("sym", s.first);
io.mapRequired("objAddr", s.second.ObjectAddress);
io.mapRequired("binAddr", s.second.BinaryAddress);
io.mapOptional("size", s.second.Size);
}
void MappingTraits<dsymutil::DebugMapObject>::mapping(
IO &io, dsymutil::DebugMapObject &DMO) {
MappingNormalization<YamlDMO, dsymutil::DebugMapObject> Norm(io, DMO);
io.mapRequired("filename", Norm->Filename);
io.mapRequired("symbols", Norm->Entries);
}
void ScalarTraits<Triple>::output(const Triple &val, void *,
llvm::raw_ostream &out) {
out << val.str();
}
StringRef ScalarTraits<Triple>::input(StringRef scalar, void *, Triple &value) {
value = Triple(scalar);
return StringRef();
}
size_t
SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>>::size(
IO &io, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq) {
return seq.size();
}
dsymutil::DebugMapObject &
SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>>::element(
IO &, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq,
size_t index) {
if (index >= seq.size()) {
seq.resize(index + 1);
seq[index].reset(new dsymutil::DebugMapObject);
}
return *seq[index];
}
void MappingTraits<dsymutil::DebugMap>::mapping(IO &io,
dsymutil::DebugMap &DM) {
io.mapRequired("triple", DM.BinaryTriple);
io.mapOptional("objects", DM.Objects);
if (void *Ctxt = io.getContext())
reinterpret_cast<YAMLContext *>(Ctxt)->BinaryTriple = DM.BinaryTriple;
}
void MappingTraits<std::unique_ptr<dsymutil::DebugMap>>::mapping(
IO &io, std::unique_ptr<dsymutil::DebugMap> &DM) {
if (!DM)
DM.reset(new DebugMap());
io.mapRequired("triple", DM->BinaryTriple);
io.mapOptional("objects", DM->Objects);
if (void *Ctxt = io.getContext())
reinterpret_cast<YAMLContext *>(Ctxt)->BinaryTriple = DM->BinaryTriple;
}
MappingTraits<dsymutil::DebugMapObject>::YamlDMO::YamlDMO(
IO &io, dsymutil::DebugMapObject &Obj) {
Filename = Obj.Filename;
Entries.reserve(Obj.Symbols.size());
for (auto &Entry : Obj.Symbols)
Entries.push_back(std::make_pair(Entry.getKey(), Entry.getValue()));
}
dsymutil::DebugMapObject
MappingTraits<dsymutil::DebugMapObject>::YamlDMO::denormalize(IO &IO) {
BinaryHolder BinHolder(/* Verbose =*/false);
const auto &Ctxt = *reinterpret_cast<YAMLContext *>(IO.getContext());
SmallString<80> Path(Ctxt.PrependPath);
StringMap<uint64_t> SymbolAddresses;
sys::path::append(Path, Filename);
auto ErrOrObjectFile = BinHolder.GetObjectFile(Path);
if (auto EC = ErrOrObjectFile.getError()) {
llvm::errs() << "warning: Unable to open " << Path << " " << EC.message()
<< '\n';
} else {
// Rewrite the object file symbol addresses in the debug map. The
// YAML input is mainly used to test llvm-dsymutil without
// requiring binaries checked-in. If we generate the object files
// during the test, we can't hardcode the symbols addresses, so
// look them up here and rewrite them.
for (const auto &Sym : ErrOrObjectFile->symbols()) {
uint64_t Address = Sym.getValue();
ErrorOr<StringRef> Name = Sym.getName();
if (!Name)
continue;
SymbolAddresses[*Name] = Address;
}
}
dsymutil::DebugMapObject Res(Path);
for (auto &Entry : Entries) {
auto &Mapping = Entry.second;
uint64_t ObjAddress = Mapping.ObjectAddress;
auto AddressIt = SymbolAddresses.find(Entry.first);
if (AddressIt != SymbolAddresses.end())
ObjAddress = AddressIt->getValue();
Res.addSymbol(Entry.first, ObjAddress, Mapping.BinaryAddress, Mapping.Size);
}
return Res;
}
}
}