1 //===- FileWriter.cpp -------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/DebugInfo/GSYM/FileWriter.h" 10 #include "llvm/Support/LEB128.h" 11 #include "llvm/Support/raw_ostream.h" 12 #include <cassert> 13 14 using namespace llvm; 15 using namespace gsym; 16 17 FileWriter::~FileWriter() { OS.flush(); } 18 19 void FileWriter::writeSLEB(int64_t S) { 20 uint8_t Bytes[32]; 21 auto Length = encodeSLEB128(S, Bytes); 22 assert(Length < sizeof(Bytes)); 23 OS.write(reinterpret_cast<const char *>(Bytes), Length); 24 } 25 26 void FileWriter::writeULEB(uint64_t U) { 27 uint8_t Bytes[32]; 28 auto Length = encodeULEB128(U, Bytes); 29 assert(Length < sizeof(Bytes)); 30 OS.write(reinterpret_cast<const char *>(Bytes), Length); 31 } 32 33 void FileWriter::writeU8(uint8_t U) { 34 OS.write(reinterpret_cast<const char *>(&U), sizeof(U)); 35 } 36 37 void FileWriter::writeU16(uint16_t U) { 38 const uint16_t Swapped = support::endian::byte_swap(U, ByteOrder); 39 OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped)); 40 } 41 42 void FileWriter::writeU32(uint32_t U) { 43 const uint32_t Swapped = support::endian::byte_swap(U, ByteOrder); 44 OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped)); 45 } 46 47 void FileWriter::writeU64(uint64_t U) { 48 const uint64_t Swapped = support::endian::byte_swap(U, ByteOrder); 49 OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped)); 50 } 51 52 void FileWriter::fixup32(uint32_t U, uint64_t Offset) { 53 const uint32_t Swapped = support::endian::byte_swap(U, ByteOrder); 54 OS.pwrite(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped), 55 Offset); 56 } 57 58 void FileWriter::writeData(llvm::ArrayRef<uint8_t> Data) { 59 OS.write(reinterpret_cast<const char *>(Data.data()), Data.size()); 60 } 61 62 void FileWriter::writeNullTerminated(llvm::StringRef Str) { 63 OS << Str << '\0'; 64 } 65 66 uint64_t FileWriter::tell() { 67 return OS.tell(); 68 } 69 70 void FileWriter::alignTo(size_t Align) { 71 off_t Offset = OS.tell(); 72 off_t AlignedOffset = (Offset + Align - 1) / Align * Align; 73 if (AlignedOffset == Offset) 74 return; 75 off_t PadCount = AlignedOffset - Offset; 76 OS.write_zeros(PadCount); 77 } 78