110 lines
4.0 KiB
C++
110 lines
4.0 KiB
C++
//===- Header.cpp -----------------------------------------------*- C++ -*-===//
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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 "llvm/DebugInfo/GSYM/Header.h"
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#include "llvm/DebugInfo/GSYM/FileWriter.h"
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#include "llvm/Support/DataExtractor.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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#define HEX8(v) llvm::format_hex(v, 4)
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#define HEX16(v) llvm::format_hex(v, 6)
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#define HEX32(v) llvm::format_hex(v, 10)
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#define HEX64(v) llvm::format_hex(v, 18)
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using namespace llvm;
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using namespace gsym;
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raw_ostream &llvm::gsym::operator<<(raw_ostream &OS, const Header &H) {
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OS << "Header:\n";
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OS << " Magic = " << HEX32(H.Magic) << "\n";
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OS << " Version = " << HEX16(H.Version) << '\n';
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OS << " AddrOffSize = " << HEX8(H.AddrOffSize) << '\n';
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OS << " UUIDSize = " << HEX8(H.UUIDSize) << '\n';
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OS << " BaseAddress = " << HEX64(H.BaseAddress) << '\n';
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OS << " NumAddresses = " << HEX32(H.NumAddresses) << '\n';
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OS << " StrtabOffset = " << HEX32(H.StrtabOffset) << '\n';
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OS << " StrtabSize = " << HEX32(H.StrtabSize) << '\n';
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OS << " UUID = ";
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for (uint8_t I = 0; I < H.UUIDSize; ++I)
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OS << format_hex_no_prefix(H.UUID[I], 2);
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OS << '\n';
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return OS;
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}
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/// Check the header and detect any errors.
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llvm::Error Header::checkForError() const {
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if (Magic != GSYM_MAGIC)
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return createStringError(std::errc::invalid_argument,
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"invalid GSYM magic 0x%8.8x", Magic);
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if (Version != GSYM_VERSION)
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return createStringError(std::errc::invalid_argument,
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"unsupported GSYM version %u", Version);
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switch (AddrOffSize) {
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case 1: break;
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case 2: break;
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case 4: break;
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case 8: break;
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default:
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return createStringError(std::errc::invalid_argument,
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"invalid address offset size %u",
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AddrOffSize);
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}
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if (UUIDSize > GSYM_MAX_UUID_SIZE)
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return createStringError(std::errc::invalid_argument,
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"invalid UUID size %u", UUIDSize);
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return Error::success();
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}
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llvm::Expected<Header> Header::decode(DataExtractor &Data) {
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uint64_t Offset = 0;
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// The header is stored as a single blob of data that has a fixed byte size.
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if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Header)))
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return createStringError(std::errc::invalid_argument,
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"not enough data for a gsym::Header");
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Header H;
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H.Magic = Data.getU32(&Offset);
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H.Version = Data.getU16(&Offset);
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H.AddrOffSize = Data.getU8(&Offset);
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H.UUIDSize = Data.getU8(&Offset);
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H.BaseAddress = Data.getU64(&Offset);
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H.NumAddresses = Data.getU32(&Offset);
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H.StrtabOffset = Data.getU32(&Offset);
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H.StrtabSize = Data.getU32(&Offset);
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Data.getU8(&Offset, H.UUID, GSYM_MAX_UUID_SIZE);
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if (llvm::Error Err = H.checkForError())
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return std::move(Err);
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return H;
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}
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llvm::Error Header::encode(FileWriter &O) const {
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// Users must verify the Header is valid prior to calling this funtion.
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if (llvm::Error Err = checkForError())
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return Err;
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O.writeU32(Magic);
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O.writeU16(Version);
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O.writeU8(AddrOffSize);
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O.writeU8(UUIDSize);
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O.writeU64(BaseAddress);
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O.writeU32(NumAddresses);
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O.writeU32(StrtabOffset);
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O.writeU32(StrtabSize);
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O.writeData(llvm::ArrayRef<uint8_t>(UUID));
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return Error::success();
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}
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bool llvm::gsym::operator==(const Header &LHS, const Header &RHS) {
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return LHS.Magic == RHS.Magic && LHS.Version == RHS.Version &&
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LHS.AddrOffSize == RHS.AddrOffSize && LHS.UUIDSize == RHS.UUIDSize &&
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LHS.BaseAddress == RHS.BaseAddress &&
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LHS.NumAddresses == RHS.NumAddresses &&
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LHS.StrtabOffset == RHS.StrtabOffset &&
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LHS.StrtabSize == RHS.StrtabSize &&
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memcmp(LHS.UUID, RHS.UUID, LHS.UUIDSize) == 0;
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}
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