1b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer//===-- DWARFDebugLine.cpp ------------------------------------------------===// 2b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// 3b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// The LLVM Compiler Infrastructure 4b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// 5b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// This file is distributed under the University of Illinois Open Source 6b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// License. See LICENSE.TXT for details. 7b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// 8b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer//===----------------------------------------------------------------------===// 9b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 10b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "DWARFDebugLine.h" 11b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "llvm/Support/Dwarf.h" 12b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "llvm/Support/Format.h" 1338a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov#include "llvm/Support/Path.h" 14b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "llvm/Support/raw_ostream.h" 157393c7f748acb10b143cab296ae98551b4c430f4Benjamin Kramer#include <algorithm> 16b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerusing namespace llvm; 17b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerusing namespace dwarf; 18b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 19b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Prologue::dump(raw_ostream &OS) const { 20b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << "Line table prologue:\n" 21b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" total_length: 0x%8.8x\n", TotalLength) 22b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" version: %u\n", Version) 23b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format("prologue_length: 0x%8.8x\n", PrologueLength) 24b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format("min_inst_length: %u\n", MinInstLength) 25b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format("default_is_stmt: %u\n", DefaultIsStmt) 26b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" line_base: %i\n", LineBase) 27b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" line_range: %u\n", LineRange) 28b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" opcode_base: %u\n", OpcodeBase); 29b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 30b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 0; i < StandardOpcodeLengths.size(); ++i) 31b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << format("standard_opcode_lengths[%s] = %u\n", LNStandardString(i+1), 32b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer StandardOpcodeLengths[i]); 33b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 34b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!IncludeDirectories.empty()) 35b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 0; i < IncludeDirectories.size(); ++i) 36b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << format("include_directories[%3u] = '", i+1) 37b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << IncludeDirectories[i] << "'\n"; 38b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 39b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!FileNames.empty()) { 40b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << " Dir Mod Time File Len File Name\n" 41b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << " ---- ---------- ---------- -----------" 42b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer "----------------\n"; 43b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 0; i < FileNames.size(); ++i) { 44b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const FileNameEntry& fileEntry = FileNames[i]; 455eccd36f1a8d917201b39697f3f1b6f45ecc139cBenjamin Kramer OS << format("file_names[%3u] %4" PRIu64 " ", i+1, fileEntry.DirIdx) 465eccd36f1a8d917201b39697f3f1b6f45ecc139cBenjamin Kramer << format("0x%8.8" PRIx64 " 0x%8.8" PRIx64 " ", 475eccd36f1a8d917201b39697f3f1b6f45ecc139cBenjamin Kramer fileEntry.ModTime, fileEntry.Length) 48b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << fileEntry.Name << '\n'; 49b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 50b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 51b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 52b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 53b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Row::postAppend() { 54b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer BasicBlock = false; 55b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer PrologueEnd = false; 56b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer EpilogueBegin = false; 57b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 58b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 59b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Row::reset(bool default_is_stmt) { 60b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Address = 0; 61b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Line = 1; 62b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Column = 0; 63b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer File = 1; 64b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Isa = 0; 65b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer IsStmt = default_is_stmt; 66b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer BasicBlock = false; 67b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer EndSequence = false; 68b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer PrologueEnd = false; 69b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer EpilogueBegin = false; 70b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 71b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 72b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Row::dump(raw_ostream &OS) const { 7341a964931a0e0943ceef28b0c691843bf8ca87b7Benjamin Kramer OS << format("0x%16.16" PRIx64 " %6u %6u", Address, Line, Column) 74b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" %6u %3u ", File, Isa) 75b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (IsStmt ? " is_stmt" : "") 76b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (BasicBlock ? " basic_block" : "") 77b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (PrologueEnd ? " prologue_end" : "") 78b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (EpilogueBegin ? " epilogue_begin" : "") 79b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (EndSequence ? " end_sequence" : "") 80b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << '\n'; 81b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 82b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 83b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::LineTable::dump(raw_ostream &OS) const { 84b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Prologue.dump(OS); 85b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << '\n'; 86b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 87b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!Rows.empty()) { 88b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << "Address Line Column File ISA Flags\n" 89b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << "------------------ ------ ------ ------ --- -------------\n"; 90b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (std::vector<Row>::const_iterator pos = Rows.begin(), 91b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer end = Rows.end(); pos != end; ++pos) 92b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer pos->dump(OS); 93b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 94b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 95b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 966bc4e712dc35db68a621f54c176f6e0b14f40f97Nick LewyckyDWARFDebugLine::State::~State() {} 976bc4e712dc35db68a621f54c176f6e0b14f40f97Nick Lewycky 98b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::State::appendRowToMatrix(uint32_t offset) { 99351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (Sequence::Empty) { 100351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // Record the beginning of instruction sequence. 101351f83be64057380877615153fe5dc50308ab017Alexey Samsonov Sequence::Empty = false; 102351f83be64057380877615153fe5dc50308ab017Alexey Samsonov Sequence::LowPC = Address; 103351f83be64057380877615153fe5dc50308ab017Alexey Samsonov Sequence::FirstRowIndex = row; 104351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } 105b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer ++row; // Increase the row number. 106b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer LineTable::appendRow(*this); 107351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (EndSequence) { 108351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // Record the end of instruction sequence. 109351f83be64057380877615153fe5dc50308ab017Alexey Samsonov Sequence::HighPC = Address; 110351f83be64057380877615153fe5dc50308ab017Alexey Samsonov Sequence::LastRowIndex = row; 111351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (Sequence::isValid()) 112351f83be64057380877615153fe5dc50308ab017Alexey Samsonov LineTable::appendSequence(*this); 113351f83be64057380877615153fe5dc50308ab017Alexey Samsonov Sequence::reset(); 114351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } 115b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Row::postAppend(); 116b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 117b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 118351f83be64057380877615153fe5dc50308ab017Alexey Samsonovvoid DWARFDebugLine::State::finalize() { 119351f83be64057380877615153fe5dc50308ab017Alexey Samsonov row = DoneParsingLineTable; 120351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (!Sequence::Empty) { 121351f83be64057380877615153fe5dc50308ab017Alexey Samsonov fprintf(stderr, "warning: last sequence in debug line table is not" 122351f83be64057380877615153fe5dc50308ab017Alexey Samsonov "terminated!\n"); 123351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } 124351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // Sort all sequences so that address lookup will work faster. 125351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (!Sequences.empty()) { 126351f83be64057380877615153fe5dc50308ab017Alexey Samsonov std::sort(Sequences.begin(), Sequences.end(), Sequence::orderByLowPC); 127351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // Note: actually, instruction address ranges of sequences should not 128351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // overlap (in shared objects and executables). If they do, the address 129351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // lookup would still work, though, but result would be ambiguous. 130351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // We don't report warning in this case. For example, 131351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // sometimes .so compiled from multiple object files contains a few 132351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // rudimentary sequences for address ranges [0x0, 0xsomething). 133351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } 134351f83be64057380877615153fe5dc50308ab017Alexey Samsonov} 135351f83be64057380877615153fe5dc50308ab017Alexey Samsonov 1366bc4e712dc35db68a621f54c176f6e0b14f40f97Nick LewyckyDWARFDebugLine::DumpingState::~DumpingState() {} 1376bc4e712dc35db68a621f54c176f6e0b14f40f97Nick Lewycky 138351f83be64057380877615153fe5dc50308ab017Alexey Samsonovvoid DWARFDebugLine::DumpingState::finalize() { 139b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer LineTable::dump(OS); 140b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 141b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 142b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerconst DWARFDebugLine::LineTable * 143b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin KramerDWARFDebugLine::getLineTable(uint32_t offset) const { 144b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer LineTableConstIter pos = LineTableMap.find(offset); 145b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (pos != LineTableMap.end()) 146b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return &pos->second; 147b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return 0; 148b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 149b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 150c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramerconst DWARFDebugLine::LineTable * 151c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin KramerDWARFDebugLine::getOrParseLineTable(DataExtractor debug_line_data, 152c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer uint32_t offset) { 1531d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer std::pair<LineTableIter, bool> pos = 1541d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer LineTableMap.insert(LineTableMapTy::value_type(offset, LineTable())); 1551d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer if (pos.second) { 156c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer // Parse and cache the line table for at this offset. 157c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer State state; 158ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor if (!parseStatementTable(debug_line_data, RelocMap, &offset, state)) 159c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer return 0; 1601d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer pos.first->second = state; 161c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer } 1621d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer return &pos.first->second; 163c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer} 164c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer 165b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerbool 166b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin KramerDWARFDebugLine::parsePrologue(DataExtractor debug_line_data, 167b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t *offset_ptr, Prologue *prologue) { 168b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t prologue_offset = *offset_ptr; 169b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 170b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->clear(); 171b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->TotalLength = debug_line_data.getU32(offset_ptr); 172b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->Version = debug_line_data.getU16(offset_ptr); 173b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (prologue->Version != 2) 174b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return false; 175b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 176b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->PrologueLength = debug_line_data.getU32(offset_ptr); 177b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t end_prologue_offset = prologue->PrologueLength + *offset_ptr; 178b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength = debug_line_data.getU8(offset_ptr); 179b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->DefaultIsStmt = debug_line_data.getU8(offset_ptr); 180b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->LineBase = debug_line_data.getU8(offset_ptr); 181b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->LineRange = debug_line_data.getU8(offset_ptr); 182b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->OpcodeBase = debug_line_data.getU8(offset_ptr); 183b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 184b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->StandardOpcodeLengths.reserve(prologue->OpcodeBase-1); 185b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 1; i < prologue->OpcodeBase; ++i) { 186b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t op_len = debug_line_data.getU8(offset_ptr); 187b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->StandardOpcodeLengths.push_back(op_len); 188b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 189b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 190b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer while (*offset_ptr < end_prologue_offset) { 191b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const char *s = debug_line_data.getCStr(offset_ptr); 192b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (s && s[0]) 193b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->IncludeDirectories.push_back(s); 194b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer else 195b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 196b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 197b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 198b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer while (*offset_ptr < end_prologue_offset) { 199b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const char *name = debug_line_data.getCStr(offset_ptr); 200b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (name && name[0]) { 201b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer FileNameEntry fileEntry; 202b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Name = name; 203b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.DirIdx = debug_line_data.getULEB128(offset_ptr); 204b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.ModTime = debug_line_data.getULEB128(offset_ptr); 205b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Length = debug_line_data.getULEB128(offset_ptr); 206b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->FileNames.push_back(fileEntry); 207b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else { 208b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 209b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 210b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 211b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 212b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (*offset_ptr != end_prologue_offset) { 213b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fprintf(stderr, "warning: parsing line table prologue at 0x%8.8x should" 2143a79eac5b8b2fa9e1376a7833723b6bfc1d26570NAKAMURA Takumi " have ended at 0x%8.8x but it ended ad 0x%8.8x\n", 215b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue_offset, end_prologue_offset, *offset_ptr); 216351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return false; 217b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 218351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return true; 219b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 220b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 221b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerbool 222ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew KaylorDWARFDebugLine::parseStatementTable(DataExtractor debug_line_data, 223ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor const RelocAddrMap *RMap, 224b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t *offset_ptr, State &state) { 225b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t debug_line_offset = *offset_ptr; 226b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 227b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Prologue *prologue = &state.Prologue; 228b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 229b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!parsePrologue(debug_line_data, offset_ptr, prologue)) { 230b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Restore our offset and return false to indicate failure! 231b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer *offset_ptr = debug_line_offset; 232b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return false; 233b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 234b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 235b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t end_offset = debug_line_offset + prologue->TotalLength + 236b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer sizeof(prologue->TotalLength); 237b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 2389013db3399d2847899ba32daf58844bba1aef6ddBenjamin Kramer state.reset(); 2399013db3399d2847899ba32daf58844bba1aef6ddBenjamin Kramer 240b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer while (*offset_ptr < end_offset) { 241b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t opcode = debug_line_data.getU8(offset_ptr); 242b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 243b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (opcode == 0) { 244b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Extended Opcodes always start with a zero opcode followed by 245b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a uleb128 length so you can skip ones you don't know about 246b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t ext_offset = *offset_ptr; 247b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t len = debug_line_data.getULEB128(offset_ptr); 248b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t arg_size = len - (*offset_ptr - ext_offset); 249b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 250b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t sub_opcode = debug_line_data.getU8(offset_ptr); 251b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer switch (sub_opcode) { 252b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNE_end_sequence: 253b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Set the end_sequence register of the state machine to true and 254b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // append a row to the matrix using the current values of the 255b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state-machine registers. Then reset the registers to the initial 256b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // values specified above. Every statement program sequence must end 257b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // with a DW_LNE_end_sequence instruction which creates a row whose 258b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // address is that of the byte after the last target machine instruction 259b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // of the sequence. 260b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.EndSequence = true; 261b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.appendRowToMatrix(*offset_ptr); 262b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.reset(); 263b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 264b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 265b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNE_set_address: 266b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single relocatable address as an operand. The size of the 267b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // operand is the size appropriate to hold an address on the target 268b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // machine. Set the address register to the value given by the 269b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // relocatable address. All of the other statement program opcodes 270b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // that affect the address register add a delta to it. This instruction 271b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // stores a relocatable value into it instead. 272ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor { 273ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor // If this address is in our relocation map, apply the relocation. 274ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor RelocAddrMap::const_iterator AI = RMap->find(*offset_ptr); 275ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor if (AI != RMap->end()) { 276ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor const std::pair<uint8_t, int64_t> &R = AI->second; 277ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor state.Address = debug_line_data.getAddress(offset_ptr) + R.second; 278ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor } else 279ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor state.Address = debug_line_data.getAddress(offset_ptr); 280ee7c0d2f931590ccdc53a14b1839e11bb29fc96eAndrew Kaylor } 281b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 282b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 283b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNE_define_file: 284b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes 4 arguments. The first is a null terminated string containing 285b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a source file name. The second is an unsigned LEB128 number 286b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // representing the directory index of the directory in which the file 287b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // was found. The third is an unsigned LEB128 number representing the 288b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // time of last modification of the file. The fourth is an unsigned 289b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // LEB128 number representing the length in bytes of the file. The time 290b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // and length fields may contain LEB128(0) if the information is not 291b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // available. 292b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 293b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // The directory index represents an entry in the include_directories 294b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // section of the statement program prologue. The index is LEB128(0) 295b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // if the file was found in the current directory of the compilation, 296b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // LEB128(1) if it was found in the first directory in the 297b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // include_directories section, and so on. The directory index is 298b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // ignored for file names that represent full path names. 299b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 300b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // The files are numbered, starting at 1, in the order in which they 301b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // appear; the names in the prologue come before names defined by 302b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the DW_LNE_define_file instruction. These numbers are used in the 303b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the file register of the state machine. 304b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer { 305b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer FileNameEntry fileEntry; 306b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Name = debug_line_data.getCStr(offset_ptr); 307b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.DirIdx = debug_line_data.getULEB128(offset_ptr); 308b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.ModTime = debug_line_data.getULEB128(offset_ptr); 309b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Length = debug_line_data.getULEB128(offset_ptr); 310b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->FileNames.push_back(fileEntry); 311b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 312b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 313b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 314b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer default: 315b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Length doesn't include the zero opcode byte or the length itself, but 316b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // it does include the sub_opcode, so we have to adjust for that below 317b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer (*offset_ptr) += arg_size; 318b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 319b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 320b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else if (opcode < prologue->OpcodeBase) { 321b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer switch (opcode) { 322b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Standard Opcodes 323b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_copy: 324b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Append a row to the matrix using the 325b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // current values of the state-machine registers. Then set 326b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the basic_block register to false. 327b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.appendRowToMatrix(*offset_ptr); 328b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 329b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 330b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_advance_pc: 331b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand, multiplies it by the 332b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // min_inst_length field of the prologue, and adds the 333b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // result to the address register of the state machine. 334b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += debug_line_data.getULEB128(offset_ptr) * 335b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength; 336b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 337b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 338b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_advance_line: 339b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single signed LEB128 operand and adds that value to 340b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the line register of the state machine. 341b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Line += debug_line_data.getSLEB128(offset_ptr); 342b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 343b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 344b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_file: 345b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand and stores it in the file 346b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // register of the state machine. 347b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.File = debug_line_data.getULEB128(offset_ptr); 348b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 349b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 350b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_column: 351b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand and stores it in the 352b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // column register of the state machine. 353b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Column = debug_line_data.getULEB128(offset_ptr); 354b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 355b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 356b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_negate_stmt: 357b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the is_stmt register of the state 358b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // machine to the logical negation of its current value. 359b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.IsStmt = !state.IsStmt; 360b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 361b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 362b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_basic_block: 363b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the basic_block register of the 364b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state machine to true 365b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.BasicBlock = true; 366b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 367b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 368b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_const_add_pc: 369b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Add to the address register of the state 370b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // machine the address increment value corresponding to special 371b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode 255. The motivation for DW_LNS_const_add_pc is this: 372b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // when the statement program needs to advance the address by a 373b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // small amount, it can use a single special opcode, which occupies 374b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a single byte. When it needs to advance the address by up to 375b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // twice the range of the last special opcode, it can use 376b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // DW_LNS_const_add_pc followed by a special opcode, for a total 377b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // of two bytes. Only if it needs to advance the address by more 378b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // than twice that range will it need to use both DW_LNS_advance_pc 379b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // and a special opcode, requiring three or more bytes. 380b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer { 381b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t adjust_opcode = 255 - prologue->OpcodeBase; 382b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t addr_offset = (adjust_opcode / prologue->LineRange) * 383b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength; 384b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += addr_offset; 385b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 386b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 387b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 388b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_fixed_advance_pc: 389b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single uhalf operand. Add to the address register of 390b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the state machine the value of the (unencoded) operand. This 391b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // is the only extended opcode that takes an argument that is not 392b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a variable length number. The motivation for DW_LNS_fixed_advance_pc 393b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // is this: existing assemblers cannot emit DW_LNS_advance_pc or 394b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // special opcodes because they cannot encode LEB128 numbers or 395b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // judge when the computation of a special opcode overflows and 396b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // requires the use of DW_LNS_advance_pc. Such assemblers, however, 397b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // can use DW_LNS_fixed_advance_pc instead, sacrificing compression. 398b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += debug_line_data.getU16(offset_ptr); 399b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 400b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 401b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_prologue_end: 402b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the prologue_end register of the 403b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state machine to true 404b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.PrologueEnd = true; 405b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 406b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 407b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_epilogue_begin: 408b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the basic_block register of the 409b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state machine to true 410b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.EpilogueBegin = true; 411b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 412b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 413b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_isa: 414b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand and stores it in the 415b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // column register of the state machine. 416b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Isa = debug_line_data.getULEB128(offset_ptr); 417b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 418b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 419b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer default: 420b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Handle any unknown standard opcodes here. We know the lengths 421b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // of such opcodes because they are specified in the prologue 422b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // as a multiple of LEB128 operands for each opcode. 423b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer { 424068d9a564b6010787992597f75e2065ceffb53eaBenjamin Kramer assert(opcode - 1U < prologue->StandardOpcodeLengths.size()); 425b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t opcode_length = prologue->StandardOpcodeLengths[opcode - 1]; 426b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint8_t i=0; i<opcode_length; ++i) 427b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer debug_line_data.getULEB128(offset_ptr); 428b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 429b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 430b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 431b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else { 432b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Special Opcodes 433b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 434b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // A special opcode value is chosen based on the amount that needs 435b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // to be added to the line and address registers. The maximum line 436b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // increment for a special opcode is the value of the line_base 437b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // field in the header, plus the value of the line_range field, 438b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // minus 1 (line base + line range - 1). If the desired line 439b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // increment is greater than the maximum line increment, a standard 440017449d64b8920eb926e9e752e22d2f5921a6237NAKAMURA Takumi // opcode must be used instead of a special opcode. The "address 441017449d64b8920eb926e9e752e22d2f5921a6237NAKAMURA Takumi // advance" is calculated by dividing the desired address increment 442b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // by the minimum_instruction_length field from the header. The 443b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // special opcode is then calculated using the following formula: 444b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 445b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode = (desired line increment - line_base) + 446b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // (line_range * address advance) + opcode_base 447b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 448b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // If the resulting opcode is greater than 255, a standard opcode 449b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // must be used instead. 450b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 451b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // To decode a special opcode, subtract the opcode_base from the 452b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode itself to give the adjusted opcode. The amount to 453b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // increment the address register is the result of the adjusted 454b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode divided by the line_range multiplied by the 455b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // minimum_instruction_length field from the header. That is: 456b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 457b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // address increment = (adjusted opcode / line_range) * 458b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // minimum_instruction_length 459b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 460b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // The amount to increment the line register is the line_base plus 461b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the result of the adjusted opcode modulo the line_range. That is: 462b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 463b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // line increment = line_base + (adjusted opcode % line_range) 464b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 465b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t adjust_opcode = opcode - prologue->OpcodeBase; 466b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t addr_offset = (adjust_opcode / prologue->LineRange) * 467b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength; 468b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer int32_t line_offset = prologue->LineBase + 469b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer (adjust_opcode % prologue->LineRange); 470b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Line += line_offset; 471b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += addr_offset; 472b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.appendRowToMatrix(*offset_ptr); 473b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 474b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 475b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 476351f83be64057380877615153fe5dc50308ab017Alexey Samsonov state.finalize(); 477b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 478b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return end_offset; 479b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 480b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 481b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Krameruint32_t 482351f83be64057380877615153fe5dc50308ab017Alexey SamsonovDWARFDebugLine::LineTable::lookupAddress(uint64_t address) const { 483351f83be64057380877615153fe5dc50308ab017Alexey Samsonov uint32_t unknown_index = UINT32_MAX; 484351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (Sequences.empty()) 485351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return unknown_index; 486351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // First, find an instruction sequence containing the given address. 487351f83be64057380877615153fe5dc50308ab017Alexey Samsonov DWARFDebugLine::Sequence sequence; 488351f83be64057380877615153fe5dc50308ab017Alexey Samsonov sequence.LowPC = address; 489351f83be64057380877615153fe5dc50308ab017Alexey Samsonov SequenceIter first_seq = Sequences.begin(); 490351f83be64057380877615153fe5dc50308ab017Alexey Samsonov SequenceIter last_seq = Sequences.end(); 491351f83be64057380877615153fe5dc50308ab017Alexey Samsonov SequenceIter seq_pos = std::lower_bound(first_seq, last_seq, sequence, 492351f83be64057380877615153fe5dc50308ab017Alexey Samsonov DWARFDebugLine::Sequence::orderByLowPC); 493351f83be64057380877615153fe5dc50308ab017Alexey Samsonov DWARFDebugLine::Sequence found_seq; 494351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (seq_pos == last_seq) { 495351f83be64057380877615153fe5dc50308ab017Alexey Samsonov found_seq = Sequences.back(); 496351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } else if (seq_pos->LowPC == address) { 497351f83be64057380877615153fe5dc50308ab017Alexey Samsonov found_seq = *seq_pos; 498351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } else { 499351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (seq_pos == first_seq) 500351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return unknown_index; 501351f83be64057380877615153fe5dc50308ab017Alexey Samsonov found_seq = *(seq_pos - 1); 502351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } 503351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (!found_seq.containsPC(address)) 504351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return unknown_index; 505351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // Search for instruction address in the rows describing the sequence. 506351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // Rows are stored in a vector, so we may use arithmetical operations with 507351f83be64057380877615153fe5dc50308ab017Alexey Samsonov // iterators. 508351f83be64057380877615153fe5dc50308ab017Alexey Samsonov DWARFDebugLine::Row row; 509351f83be64057380877615153fe5dc50308ab017Alexey Samsonov row.Address = address; 510351f83be64057380877615153fe5dc50308ab017Alexey Samsonov RowIter first_row = Rows.begin() + found_seq.FirstRowIndex; 511351f83be64057380877615153fe5dc50308ab017Alexey Samsonov RowIter last_row = Rows.begin() + found_seq.LastRowIndex; 512351f83be64057380877615153fe5dc50308ab017Alexey Samsonov RowIter row_pos = std::lower_bound(first_row, last_row, row, 513351f83be64057380877615153fe5dc50308ab017Alexey Samsonov DWARFDebugLine::Row::orderByAddress); 514351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (row_pos == last_row) { 515351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return found_seq.LastRowIndex - 1; 516351f83be64057380877615153fe5dc50308ab017Alexey Samsonov } 517351f83be64057380877615153fe5dc50308ab017Alexey Samsonov uint32_t index = found_seq.FirstRowIndex + (row_pos - first_row); 518351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (row_pos->Address > address) { 519351f83be64057380877615153fe5dc50308ab017Alexey Samsonov if (row_pos == first_row) 520351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return unknown_index; 521351f83be64057380877615153fe5dc50308ab017Alexey Samsonov else 522351f83be64057380877615153fe5dc50308ab017Alexey Samsonov index--; 523b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 524351f83be64057380877615153fe5dc50308ab017Alexey Samsonov return index; 525b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 52638a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov 52738a6381c0a58e013577b1957199128af9573fc20Alexey Samsonovbool 528e27a787760ea7c2899da3287002fe8ba316df0d0Andrew KaylorDWARFDebugLine::LineTable::lookupAddressRange(uint64_t address, 529e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor uint64_t size, 530e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor std::vector<uint32_t>& result) const { 531e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (Sequences.empty()) 532e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor return false; 533e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor uint64_t end_addr = address + size; 534e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // First, find an instruction sequence containing the given address. 535e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Sequence sequence; 536e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor sequence.LowPC = address; 537e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor SequenceIter first_seq = Sequences.begin(); 538e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor SequenceIter last_seq = Sequences.end(); 539e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor SequenceIter seq_pos = std::lower_bound(first_seq, last_seq, sequence, 540e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Sequence::orderByLowPC); 541e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (seq_pos == last_seq || seq_pos->LowPC != address) { 542e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (seq_pos == first_seq) 543e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor return false; 544e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor seq_pos--; 545e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor } 546e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (!seq_pos->containsPC(address)) 547e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor return false; 548e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 549e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor SequenceIter start_pos = seq_pos; 550e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 551e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // Add the rows from the first sequence to the vector, starting with the 552e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // index we just calculated 553e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 554e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor while (seq_pos != last_seq && seq_pos->LowPC < end_addr) { 555e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Sequence cur_seq = *seq_pos; 556e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor uint32_t first_row_index; 557e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor uint32_t last_row_index; 558e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (seq_pos == start_pos) { 559e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // For the first sequence, we need to find which row in the sequence is the 560e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // first in our range. Rows are stored in a vector, so we may use 561e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // arithmetical operations with iterators. 562e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Row row; 563e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor row.Address = address; 564e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor RowIter first_row = Rows.begin() + cur_seq.FirstRowIndex; 565e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor RowIter last_row = Rows.begin() + cur_seq.LastRowIndex; 566e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor RowIter row_pos = std::upper_bound(first_row, last_row, row, 567e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Row::orderByAddress); 568e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // The 'row_pos' iterator references the first row that is greater than 569e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // our start address. Unless that's the first row, we want to start at 570e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // the row before that. 571e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor first_row_index = cur_seq.FirstRowIndex + (row_pos - first_row); 572e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (row_pos != first_row) 573e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor --first_row_index; 574e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor } else 575e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor first_row_index = cur_seq.FirstRowIndex; 576e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 577e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // For the last sequence in our range, we need to figure out the last row in 578e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // range. For all other sequences we can go to the end of the sequence. 579e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor if (cur_seq.HighPC > end_addr) { 580e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Row row; 581e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor row.Address = end_addr; 582e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor RowIter first_row = Rows.begin() + cur_seq.FirstRowIndex; 583e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor RowIter last_row = Rows.begin() + cur_seq.LastRowIndex; 584e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor RowIter row_pos = std::upper_bound(first_row, last_row, row, 585e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor DWARFDebugLine::Row::orderByAddress); 586e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // The 'row_pos' iterator references the first row that is greater than 587e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // our end address. The row before that is the last row we want. 588e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor last_row_index = cur_seq.FirstRowIndex + (row_pos - first_row) - 1; 589e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor } else 590e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // Contrary to what you might expect, DWARFDebugLine::SequenceLastRowIndex 591e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor // isn't a valid index within the current sequence. It's that plus one. 592e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor last_row_index = cur_seq.LastRowIndex - 1; 593e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 594e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor for (uint32_t i = first_row_index; i <= last_row_index; ++i) { 595e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor result.push_back(i); 596e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor } 597e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 598e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor ++seq_pos; 599e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor } 6008090a24bd6369662dfcd9d9df21b9c122238ed10NAKAMURA Takumi 6018090a24bd6369662dfcd9d9df21b9c122238ed10NAKAMURA Takumi return true; 602e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor} 603e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylor 604e27a787760ea7c2899da3287002fe8ba316df0d0Andrew Kaylorbool 60538a6381c0a58e013577b1957199128af9573fc20Alexey SamsonovDWARFDebugLine::LineTable::getFileNameByIndex(uint64_t FileIndex, 60638a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov bool NeedsAbsoluteFilePath, 60738a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov std::string &Result) const { 60838a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov if (FileIndex == 0 || FileIndex > Prologue.FileNames.size()) 60938a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov return false; 61038a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov const FileNameEntry &Entry = Prologue.FileNames[FileIndex - 1]; 61138a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov const char *FileName = Entry.Name; 61238a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov if (!NeedsAbsoluteFilePath || 61338a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov sys::path::is_absolute(FileName)) { 61438a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov Result = FileName; 61538a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov return true; 61638a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov } 61738a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov SmallString<16> FilePath; 61838a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov uint64_t IncludeDirIndex = Entry.DirIdx; 61938a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov // Be defensive about the contents of Entry. 62038a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov if (IncludeDirIndex > 0 && 62138a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov IncludeDirIndex <= Prologue.IncludeDirectories.size()) { 62238a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov const char *IncludeDir = Prologue.IncludeDirectories[IncludeDirIndex - 1]; 62338a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov sys::path::append(FilePath, IncludeDir); 62438a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov } 62538a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov sys::path::append(FilePath, FileName); 62638a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov Result = FilePath.str(); 62738a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov return true; 62838a6381c0a58e013577b1957199128af9573fc20Alexey Samsonov} 629