You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
407 lines
14 KiB
407 lines
14 KiB
//===- GsymReader.cpp -----------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/DebugInfo/GSYM/GsymReader.h"
|
|
|
|
#include <assert.h>
|
|
#include <inttypes.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "llvm/DebugInfo/GSYM/GsymCreator.h"
|
|
#include "llvm/DebugInfo/GSYM/InlineInfo.h"
|
|
#include "llvm/DebugInfo/GSYM/LineTable.h"
|
|
#include "llvm/Support/BinaryStreamReader.h"
|
|
#include "llvm/Support/DataExtractor.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
|
|
using namespace llvm;
|
|
using namespace gsym;
|
|
|
|
GsymReader::GsymReader(std::unique_ptr<MemoryBuffer> Buffer) :
|
|
MemBuffer(std::move(Buffer)),
|
|
Endian(support::endian::system_endianness()) {}
|
|
|
|
GsymReader::GsymReader(GsymReader &&RHS) = default;
|
|
|
|
GsymReader::~GsymReader() = default;
|
|
|
|
llvm::Expected<GsymReader> GsymReader::openFile(StringRef Filename) {
|
|
// Open the input file and return an appropriate error if needed.
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr =
|
|
MemoryBuffer::getFileOrSTDIN(Filename);
|
|
auto Err = BuffOrErr.getError();
|
|
if (Err)
|
|
return llvm::errorCodeToError(Err);
|
|
return create(BuffOrErr.get());
|
|
}
|
|
|
|
llvm::Expected<GsymReader> GsymReader::copyBuffer(StringRef Bytes) {
|
|
auto MemBuffer = MemoryBuffer::getMemBufferCopy(Bytes, "GSYM bytes");
|
|
return create(MemBuffer);
|
|
}
|
|
|
|
llvm::Expected<llvm::gsym::GsymReader>
|
|
GsymReader::create(std::unique_ptr<MemoryBuffer> &MemBuffer) {
|
|
if (!MemBuffer.get())
|
|
return createStringError(std::errc::invalid_argument,
|
|
"invalid memory buffer");
|
|
GsymReader GR(std::move(MemBuffer));
|
|
llvm::Error Err = GR.parse();
|
|
if (Err)
|
|
return std::move(Err);
|
|
return std::move(GR);
|
|
}
|
|
|
|
llvm::Error
|
|
GsymReader::parse() {
|
|
BinaryStreamReader FileData(MemBuffer->getBuffer(),
|
|
support::endian::system_endianness());
|
|
// Check for the magic bytes. This file format is designed to be mmap'ed
|
|
// into a process and accessed as read only. This is done for performance
|
|
// and efficiency for symbolicating and parsing GSYM data.
|
|
if (FileData.readObject(Hdr))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"not enough data for a GSYM header");
|
|
|
|
const auto HostByteOrder = support::endian::system_endianness();
|
|
switch (Hdr->Magic) {
|
|
case GSYM_MAGIC:
|
|
Endian = HostByteOrder;
|
|
break;
|
|
case GSYM_CIGAM:
|
|
// This is a GSYM file, but not native endianness.
|
|
Endian = sys::IsBigEndianHost ? support::little : support::big;
|
|
Swap.reset(new SwappedData);
|
|
break;
|
|
default:
|
|
return createStringError(std::errc::invalid_argument,
|
|
"not a GSYM file");
|
|
}
|
|
|
|
bool DataIsLittleEndian = HostByteOrder != support::little;
|
|
// Read a correctly byte swapped header if we need to.
|
|
if (Swap) {
|
|
DataExtractor Data(MemBuffer->getBuffer(), DataIsLittleEndian, 4);
|
|
if (auto ExpectedHdr = Header::decode(Data))
|
|
Swap->Hdr = ExpectedHdr.get();
|
|
else
|
|
return ExpectedHdr.takeError();
|
|
Hdr = &Swap->Hdr;
|
|
}
|
|
|
|
// Detect errors in the header and report any that are found. If we make it
|
|
// past this without errors, we know we have a good magic value, a supported
|
|
// version number, verified address offset size and a valid UUID size.
|
|
if (Error Err = Hdr->checkForError())
|
|
return Err;
|
|
|
|
if (!Swap) {
|
|
// This is the native endianness case that is most common and optimized for
|
|
// efficient lookups. Here we just grab pointers to the native data and
|
|
// use ArrayRef objects to allow efficient read only access.
|
|
|
|
// Read the address offsets.
|
|
if (FileData.padToAlignment(Hdr->AddrOffSize) ||
|
|
FileData.readArray(AddrOffsets,
|
|
Hdr->NumAddresses * Hdr->AddrOffSize))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address table");
|
|
|
|
// Read the address info offsets.
|
|
if (FileData.padToAlignment(4) ||
|
|
FileData.readArray(AddrInfoOffsets, Hdr->NumAddresses))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address info offsets table");
|
|
|
|
// Read the file table.
|
|
uint32_t NumFiles = 0;
|
|
if (FileData.readInteger(NumFiles) || FileData.readArray(Files, NumFiles))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read file table");
|
|
|
|
// Get the string table.
|
|
FileData.setOffset(Hdr->StrtabOffset);
|
|
if (FileData.readFixedString(StrTab.Data, Hdr->StrtabSize))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read string table");
|
|
} else {
|
|
// This is the non native endianness case that is not common and not
|
|
// optimized for lookups. Here we decode the important tables into local
|
|
// storage and then set the ArrayRef objects to point to these swapped
|
|
// copies of the read only data so lookups can be as efficient as possible.
|
|
DataExtractor Data(MemBuffer->getBuffer(), DataIsLittleEndian, 4);
|
|
|
|
// Read the address offsets.
|
|
uint64_t Offset = alignTo(sizeof(Header), Hdr->AddrOffSize);
|
|
Swap->AddrOffsets.resize(Hdr->NumAddresses * Hdr->AddrOffSize);
|
|
switch (Hdr->AddrOffSize) {
|
|
case 1:
|
|
if (!Data.getU8(&Offset, Swap->AddrOffsets.data(), Hdr->NumAddresses))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address table");
|
|
break;
|
|
case 2:
|
|
if (!Data.getU16(&Offset,
|
|
reinterpret_cast<uint16_t *>(Swap->AddrOffsets.data()),
|
|
Hdr->NumAddresses))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address table");
|
|
break;
|
|
case 4:
|
|
if (!Data.getU32(&Offset,
|
|
reinterpret_cast<uint32_t *>(Swap->AddrOffsets.data()),
|
|
Hdr->NumAddresses))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address table");
|
|
break;
|
|
case 8:
|
|
if (!Data.getU64(&Offset,
|
|
reinterpret_cast<uint64_t *>(Swap->AddrOffsets.data()),
|
|
Hdr->NumAddresses))
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address table");
|
|
}
|
|
AddrOffsets = ArrayRef<uint8_t>(Swap->AddrOffsets);
|
|
|
|
// Read the address info offsets.
|
|
Offset = alignTo(Offset, 4);
|
|
Swap->AddrInfoOffsets.resize(Hdr->NumAddresses);
|
|
if (Data.getU32(&Offset, Swap->AddrInfoOffsets.data(), Hdr->NumAddresses))
|
|
AddrInfoOffsets = ArrayRef<uint32_t>(Swap->AddrInfoOffsets);
|
|
else
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read address table");
|
|
// Read the file table.
|
|
const uint32_t NumFiles = Data.getU32(&Offset);
|
|
if (NumFiles > 0) {
|
|
Swap->Files.resize(NumFiles);
|
|
if (Data.getU32(&Offset, &Swap->Files[0].Dir, NumFiles*2))
|
|
Files = ArrayRef<FileEntry>(Swap->Files);
|
|
else
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read file table");
|
|
}
|
|
// Get the string table.
|
|
StrTab.Data = MemBuffer->getBuffer().substr(Hdr->StrtabOffset,
|
|
Hdr->StrtabSize);
|
|
if (StrTab.Data.empty())
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to read string table");
|
|
}
|
|
return Error::success();
|
|
|
|
}
|
|
|
|
const Header &GsymReader::getHeader() const {
|
|
// The only way to get a GsymReader is from GsymReader::openFile(...) or
|
|
// GsymReader::copyBuffer() and the header must be valid and initialized to
|
|
// a valid pointer value, so the assert below should not trigger.
|
|
assert(Hdr);
|
|
return *Hdr;
|
|
}
|
|
|
|
Optional<uint64_t> GsymReader::getAddress(size_t Index) const {
|
|
switch (Hdr->AddrOffSize) {
|
|
case 1: return addressForIndex<uint8_t>(Index);
|
|
case 2: return addressForIndex<uint16_t>(Index);
|
|
case 4: return addressForIndex<uint32_t>(Index);
|
|
case 8: return addressForIndex<uint64_t>(Index);
|
|
}
|
|
return llvm::None;
|
|
}
|
|
|
|
Optional<uint64_t> GsymReader::getAddressInfoOffset(size_t Index) const {
|
|
const auto NumAddrInfoOffsets = AddrInfoOffsets.size();
|
|
if (Index < NumAddrInfoOffsets)
|
|
return AddrInfoOffsets[Index];
|
|
return llvm::None;
|
|
}
|
|
|
|
Expected<uint64_t>
|
|
GsymReader::getAddressIndex(const uint64_t Addr) const {
|
|
if (Addr >= Hdr->BaseAddress) {
|
|
const uint64_t AddrOffset = Addr - Hdr->BaseAddress;
|
|
Optional<uint64_t> AddrOffsetIndex;
|
|
switch (Hdr->AddrOffSize) {
|
|
case 1:
|
|
AddrOffsetIndex = getAddressOffsetIndex<uint8_t>(AddrOffset);
|
|
break;
|
|
case 2:
|
|
AddrOffsetIndex = getAddressOffsetIndex<uint16_t>(AddrOffset);
|
|
break;
|
|
case 4:
|
|
AddrOffsetIndex = getAddressOffsetIndex<uint32_t>(AddrOffset);
|
|
break;
|
|
case 8:
|
|
AddrOffsetIndex = getAddressOffsetIndex<uint64_t>(AddrOffset);
|
|
break;
|
|
default:
|
|
return createStringError(std::errc::invalid_argument,
|
|
"unsupported address offset size %u",
|
|
Hdr->AddrOffSize);
|
|
}
|
|
if (AddrOffsetIndex)
|
|
return *AddrOffsetIndex;
|
|
}
|
|
return createStringError(std::errc::invalid_argument,
|
|
"address 0x%" PRIx64 " is not in GSYM", Addr);
|
|
|
|
}
|
|
|
|
llvm::Expected<FunctionInfo> GsymReader::getFunctionInfo(uint64_t Addr) const {
|
|
Expected<uint64_t> AddressIndex = getAddressIndex(Addr);
|
|
if (!AddressIndex)
|
|
return AddressIndex.takeError();
|
|
// Address info offsets size should have been checked in parse().
|
|
assert(*AddressIndex < AddrInfoOffsets.size());
|
|
auto AddrInfoOffset = AddrInfoOffsets[*AddressIndex];
|
|
DataExtractor Data(MemBuffer->getBuffer().substr(AddrInfoOffset), Endian, 4);
|
|
if (Optional<uint64_t> OptAddr = getAddress(*AddressIndex)) {
|
|
auto ExpectedFI = FunctionInfo::decode(Data, *OptAddr);
|
|
if (ExpectedFI) {
|
|
if (ExpectedFI->Range.contains(Addr) || ExpectedFI->Range.size() == 0)
|
|
return ExpectedFI;
|
|
return createStringError(std::errc::invalid_argument,
|
|
"address 0x%" PRIx64 " is not in GSYM", Addr);
|
|
}
|
|
}
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to extract address[%" PRIu64 "]",
|
|
*AddressIndex);
|
|
}
|
|
|
|
llvm::Expected<LookupResult> GsymReader::lookup(uint64_t Addr) const {
|
|
Expected<uint64_t> AddressIndex = getAddressIndex(Addr);
|
|
if (!AddressIndex)
|
|
return AddressIndex.takeError();
|
|
// Address info offsets size should have been checked in parse().
|
|
assert(*AddressIndex < AddrInfoOffsets.size());
|
|
auto AddrInfoOffset = AddrInfoOffsets[*AddressIndex];
|
|
DataExtractor Data(MemBuffer->getBuffer().substr(AddrInfoOffset), Endian, 4);
|
|
if (Optional<uint64_t> OptAddr = getAddress(*AddressIndex))
|
|
return FunctionInfo::lookup(Data, *this, *OptAddr, Addr);
|
|
return createStringError(std::errc::invalid_argument,
|
|
"failed to extract address[%" PRIu64 "]",
|
|
*AddressIndex);
|
|
}
|
|
|
|
void GsymReader::dump(raw_ostream &OS) {
|
|
const auto &Header = getHeader();
|
|
// Dump the GSYM header.
|
|
OS << Header << "\n";
|
|
// Dump the address table.
|
|
OS << "Address Table:\n";
|
|
OS << "INDEX OFFSET";
|
|
|
|
switch (Hdr->AddrOffSize) {
|
|
case 1: OS << "8 "; break;
|
|
case 2: OS << "16"; break;
|
|
case 4: OS << "32"; break;
|
|
case 8: OS << "64"; break;
|
|
default: OS << "??"; break;
|
|
}
|
|
OS << " (ADDRESS)\n";
|
|
OS << "====== =============================== \n";
|
|
for (uint32_t I = 0; I < Header.NumAddresses; ++I) {
|
|
OS << format("[%4u] ", I);
|
|
switch (Hdr->AddrOffSize) {
|
|
case 1: OS << HEX8(getAddrOffsets<uint8_t>()[I]); break;
|
|
case 2: OS << HEX16(getAddrOffsets<uint16_t>()[I]); break;
|
|
case 4: OS << HEX32(getAddrOffsets<uint32_t>()[I]); break;
|
|
case 8: OS << HEX32(getAddrOffsets<uint64_t>()[I]); break;
|
|
default: break;
|
|
}
|
|
OS << " (" << HEX64(*getAddress(I)) << ")\n";
|
|
}
|
|
// Dump the address info offsets table.
|
|
OS << "\nAddress Info Offsets:\n";
|
|
OS << "INDEX Offset\n";
|
|
OS << "====== ==========\n";
|
|
for (uint32_t I = 0; I < Header.NumAddresses; ++I)
|
|
OS << format("[%4u] ", I) << HEX32(AddrInfoOffsets[I]) << "\n";
|
|
// Dump the file table.
|
|
OS << "\nFiles:\n";
|
|
OS << "INDEX DIRECTORY BASENAME PATH\n";
|
|
OS << "====== ========== ========== ==============================\n";
|
|
for (uint32_t I = 0; I < Files.size(); ++I) {
|
|
OS << format("[%4u] ", I) << HEX32(Files[I].Dir) << ' '
|
|
<< HEX32(Files[I].Base) << ' ';
|
|
dump(OS, getFile(I));
|
|
OS << "\n";
|
|
}
|
|
OS << "\n" << StrTab << "\n";
|
|
|
|
for (uint32_t I = 0; I < Header.NumAddresses; ++I) {
|
|
OS << "FunctionInfo @ " << HEX32(AddrInfoOffsets[I]) << ": ";
|
|
if (auto FI = getFunctionInfo(*getAddress(I)))
|
|
dump(OS, *FI);
|
|
else
|
|
logAllUnhandledErrors(FI.takeError(), OS, "FunctionInfo:");
|
|
}
|
|
}
|
|
|
|
void GsymReader::dump(raw_ostream &OS, const FunctionInfo &FI) {
|
|
OS << FI.Range << " \"" << getString(FI.Name) << "\"\n";
|
|
if (FI.OptLineTable)
|
|
dump(OS, *FI.OptLineTable);
|
|
if (FI.Inline)
|
|
dump(OS, *FI.Inline);
|
|
}
|
|
|
|
void GsymReader::dump(raw_ostream &OS, const LineTable <) {
|
|
OS << "LineTable:\n";
|
|
for (auto &LE: LT) {
|
|
OS << " " << HEX64(LE.Addr) << ' ';
|
|
if (LE.File)
|
|
dump(OS, getFile(LE.File));
|
|
OS << ':' << LE.Line << '\n';
|
|
}
|
|
}
|
|
|
|
void GsymReader::dump(raw_ostream &OS, const InlineInfo &II, uint32_t Indent) {
|
|
if (Indent == 0)
|
|
OS << "InlineInfo:\n";
|
|
else
|
|
OS.indent(Indent);
|
|
OS << II.Ranges << ' ' << getString(II.Name);
|
|
if (II.CallFile != 0) {
|
|
if (auto File = getFile(II.CallFile)) {
|
|
OS << " called from ";
|
|
dump(OS, File);
|
|
OS << ':' << II.CallLine;
|
|
}
|
|
}
|
|
OS << '\n';
|
|
for (const auto &ChildII: II.Children)
|
|
dump(OS, ChildII, Indent + 2);
|
|
}
|
|
|
|
void GsymReader::dump(raw_ostream &OS, Optional<FileEntry> FE) {
|
|
if (FE) {
|
|
// IF we have the file from index 0, then don't print anything
|
|
if (FE->Dir == 0 && FE->Base == 0)
|
|
return;
|
|
StringRef Dir = getString(FE->Dir);
|
|
StringRef Base = getString(FE->Base);
|
|
if (!Dir.empty()) {
|
|
OS << Dir;
|
|
if (Dir.contains('\\') && !Dir.contains('/'))
|
|
OS << '\\';
|
|
else
|
|
OS << '/';
|
|
}
|
|
if (!Base.empty()) {
|
|
OS << Base;
|
|
}
|
|
if (!Dir.empty() || !Base.empty())
|
|
return;
|
|
}
|
|
OS << "<invalid-file>";
|
|
}
|