mirror of
https://github.com/c64scene-ar/llvm-6502.git
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b043c3d94a
It is more appropriate than the current situation, when one flag (AbsoluteFilePath) is relevant only if another flag is set. This refactoring would also simplify fetching the short function name (stored in DW_AT_name) instead of a linkage name returned currently. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208921 91177308-0d34-0410-b5e6-96231b3b80d8
671 lines
25 KiB
C++
671 lines
25 KiB
C++
//===-- DWARFDebugLine.cpp ------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFDebugLine.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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using namespace llvm;
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using namespace dwarf;
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typedef DILineInfoSpecifier::FileLineInfoKind FileLineInfoKind;
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DWARFDebugLine::Prologue::Prologue() {
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clear();
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}
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void DWARFDebugLine::Prologue::clear() {
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TotalLength = Version = PrologueLength = 0;
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MinInstLength = MaxOpsPerInst = DefaultIsStmt = LineBase = LineRange = 0;
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OpcodeBase = 0;
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StandardOpcodeLengths.clear();
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IncludeDirectories.clear();
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FileNames.clear();
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}
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void DWARFDebugLine::Prologue::dump(raw_ostream &OS) const {
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OS << "Line table prologue:\n"
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<< format(" total_length: 0x%8.8x\n", TotalLength)
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<< format(" version: %u\n", Version)
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<< format(" prologue_length: 0x%8.8x\n", PrologueLength)
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<< format(" min_inst_length: %u\n", MinInstLength)
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<< format(Version >= 4 ? "max_ops_per_inst: %u\n" : "", MaxOpsPerInst)
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<< format(" default_is_stmt: %u\n", DefaultIsStmt)
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<< format(" line_base: %i\n", LineBase)
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<< format(" line_range: %u\n", LineRange)
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<< format(" opcode_base: %u\n", OpcodeBase);
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for (uint32_t i = 0; i < StandardOpcodeLengths.size(); ++i)
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OS << format("standard_opcode_lengths[%s] = %u\n", LNStandardString(i+1),
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StandardOpcodeLengths[i]);
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if (!IncludeDirectories.empty())
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for (uint32_t i = 0; i < IncludeDirectories.size(); ++i)
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OS << format("include_directories[%3u] = '", i+1)
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<< IncludeDirectories[i] << "'\n";
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if (!FileNames.empty()) {
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OS << " Dir Mod Time File Len File Name\n"
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<< " ---- ---------- ---------- -----------"
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"----------------\n";
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for (uint32_t i = 0; i < FileNames.size(); ++i) {
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const FileNameEntry& fileEntry = FileNames[i];
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OS << format("file_names[%3u] %4" PRIu64 " ", i+1, fileEntry.DirIdx)
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<< format("0x%8.8" PRIx64 " 0x%8.8" PRIx64 " ",
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fileEntry.ModTime, fileEntry.Length)
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<< fileEntry.Name << '\n';
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}
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}
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}
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bool DWARFDebugLine::Prologue::parse(DataExtractor debug_line_data,
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uint32_t *offset_ptr) {
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const uint32_t prologue_offset = *offset_ptr;
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clear();
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TotalLength = debug_line_data.getU32(offset_ptr);
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Version = debug_line_data.getU16(offset_ptr);
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if (Version < 2)
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return false;
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PrologueLength = debug_line_data.getU32(offset_ptr);
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const uint32_t end_prologue_offset = PrologueLength + *offset_ptr;
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MinInstLength = debug_line_data.getU8(offset_ptr);
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if (Version >= 4)
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MaxOpsPerInst = debug_line_data.getU8(offset_ptr);
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DefaultIsStmt = debug_line_data.getU8(offset_ptr);
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LineBase = debug_line_data.getU8(offset_ptr);
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LineRange = debug_line_data.getU8(offset_ptr);
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OpcodeBase = debug_line_data.getU8(offset_ptr);
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StandardOpcodeLengths.reserve(OpcodeBase - 1);
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for (uint32_t i = 1; i < OpcodeBase; ++i) {
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uint8_t op_len = debug_line_data.getU8(offset_ptr);
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StandardOpcodeLengths.push_back(op_len);
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}
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while (*offset_ptr < end_prologue_offset) {
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const char *s = debug_line_data.getCStr(offset_ptr);
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if (s && s[0])
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IncludeDirectories.push_back(s);
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else
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break;
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}
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while (*offset_ptr < end_prologue_offset) {
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const char *name = debug_line_data.getCStr(offset_ptr);
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if (name && name[0]) {
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FileNameEntry fileEntry;
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fileEntry.Name = name;
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fileEntry.DirIdx = debug_line_data.getULEB128(offset_ptr);
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fileEntry.ModTime = debug_line_data.getULEB128(offset_ptr);
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fileEntry.Length = debug_line_data.getULEB128(offset_ptr);
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FileNames.push_back(fileEntry);
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} else {
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break;
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}
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}
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if (*offset_ptr != end_prologue_offset) {
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fprintf(stderr, "warning: parsing line table prologue at 0x%8.8x should"
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" have ended at 0x%8.8x but it ended at 0x%8.8x\n",
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prologue_offset, end_prologue_offset, *offset_ptr);
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return false;
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}
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return true;
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}
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DWARFDebugLine::Row::Row(bool default_is_stmt) {
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reset(default_is_stmt);
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}
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void DWARFDebugLine::Row::postAppend() {
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BasicBlock = false;
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PrologueEnd = false;
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EpilogueBegin = false;
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}
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void DWARFDebugLine::Row::reset(bool default_is_stmt) {
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Address = 0;
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Line = 1;
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Column = 0;
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File = 1;
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Isa = 0;
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Discriminator = 0;
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IsStmt = default_is_stmt;
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BasicBlock = false;
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EndSequence = false;
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PrologueEnd = false;
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EpilogueBegin = false;
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}
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void DWARFDebugLine::Row::dump(raw_ostream &OS) const {
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OS << format("0x%16.16" PRIx64 " %6u %6u", Address, Line, Column)
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<< format(" %6u %3u %13u ", File, Isa, Discriminator)
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<< (IsStmt ? " is_stmt" : "")
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<< (BasicBlock ? " basic_block" : "")
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<< (PrologueEnd ? " prologue_end" : "")
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<< (EpilogueBegin ? " epilogue_begin" : "")
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<< (EndSequence ? " end_sequence" : "")
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<< '\n';
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}
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DWARFDebugLine::Sequence::Sequence() {
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reset();
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}
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void DWARFDebugLine::Sequence::reset() {
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LowPC = 0;
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HighPC = 0;
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FirstRowIndex = 0;
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LastRowIndex = 0;
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Empty = true;
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}
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DWARFDebugLine::LineTable::LineTable() {
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clear();
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}
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void DWARFDebugLine::LineTable::dump(raw_ostream &OS) const {
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Prologue.dump(OS);
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OS << '\n';
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if (!Rows.empty()) {
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OS << "Address Line Column File ISA Discriminator Flags\n"
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<< "------------------ ------ ------ ------ --- ------------- "
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"-------------\n";
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for (const Row &R : Rows) {
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R.dump(OS);
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}
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}
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}
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void DWARFDebugLine::LineTable::clear() {
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Prologue.clear();
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Rows.clear();
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Sequences.clear();
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}
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DWARFDebugLine::ParsingState::ParsingState(struct LineTable *LT)
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: LineTable(LT), RowNumber(0) {
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resetRowAndSequence();
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}
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void DWARFDebugLine::ParsingState::resetRowAndSequence() {
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Row.reset(LineTable->Prologue.DefaultIsStmt);
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Sequence.reset();
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}
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void DWARFDebugLine::ParsingState::appendRowToMatrix(uint32_t offset) {
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if (Sequence.Empty) {
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// Record the beginning of instruction sequence.
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Sequence.Empty = false;
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Sequence.LowPC = Row.Address;
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Sequence.FirstRowIndex = RowNumber;
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}
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++RowNumber;
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LineTable->appendRow(Row);
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if (Row.EndSequence) {
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// Record the end of instruction sequence.
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Sequence.HighPC = Row.Address;
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Sequence.LastRowIndex = RowNumber;
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if (Sequence.isValid())
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LineTable->appendSequence(Sequence);
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Sequence.reset();
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}
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Row.postAppend();
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}
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const DWARFDebugLine::LineTable *
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DWARFDebugLine::getLineTable(uint32_t offset) const {
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LineTableConstIter pos = LineTableMap.find(offset);
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if (pos != LineTableMap.end())
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return &pos->second;
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return nullptr;
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}
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const DWARFDebugLine::LineTable *
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DWARFDebugLine::getOrParseLineTable(DataExtractor debug_line_data,
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uint32_t offset) {
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std::pair<LineTableIter, bool> pos =
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LineTableMap.insert(LineTableMapTy::value_type(offset, LineTable()));
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LineTable *LT = &pos.first->second;
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if (pos.second) {
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if (!LT->parse(debug_line_data, RelocMap, &offset))
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return nullptr;
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}
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return LT;
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}
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bool DWARFDebugLine::LineTable::parse(DataExtractor debug_line_data,
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const RelocAddrMap *RMap,
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uint32_t *offset_ptr) {
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const uint32_t debug_line_offset = *offset_ptr;
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clear();
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if (!Prologue.parse(debug_line_data, offset_ptr)) {
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// Restore our offset and return false to indicate failure!
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*offset_ptr = debug_line_offset;
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return false;
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}
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const uint32_t end_offset = debug_line_offset + Prologue.TotalLength +
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sizeof(Prologue.TotalLength);
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ParsingState State(this);
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while (*offset_ptr < end_offset) {
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uint8_t opcode = debug_line_data.getU8(offset_ptr);
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if (opcode == 0) {
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// Extended Opcodes always start with a zero opcode followed by
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// a uleb128 length so you can skip ones you don't know about
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uint32_t ext_offset = *offset_ptr;
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uint64_t len = debug_line_data.getULEB128(offset_ptr);
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uint32_t arg_size = len - (*offset_ptr - ext_offset);
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uint8_t sub_opcode = debug_line_data.getU8(offset_ptr);
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switch (sub_opcode) {
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case DW_LNE_end_sequence:
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// Set the end_sequence register of the state machine to true and
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// append a row to the matrix using the current values of the
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// state-machine registers. Then reset the registers to the initial
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// values specified above. Every statement program sequence must end
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// with a DW_LNE_end_sequence instruction which creates a row whose
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// address is that of the byte after the last target machine instruction
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// of the sequence.
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State.Row.EndSequence = true;
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State.appendRowToMatrix(*offset_ptr);
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State.resetRowAndSequence();
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break;
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case DW_LNE_set_address:
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// Takes a single relocatable address as an operand. The size of the
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// operand is the size appropriate to hold an address on the target
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// machine. Set the address register to the value given by the
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// relocatable address. All of the other statement program opcodes
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// that affect the address register add a delta to it. This instruction
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// stores a relocatable value into it instead.
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{
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// If this address is in our relocation map, apply the relocation.
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RelocAddrMap::const_iterator AI = RMap->find(*offset_ptr);
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if (AI != RMap->end()) {
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const std::pair<uint8_t, int64_t> &R = AI->second;
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State.Row.Address =
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debug_line_data.getAddress(offset_ptr) + R.second;
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} else
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State.Row.Address = debug_line_data.getAddress(offset_ptr);
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}
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break;
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case DW_LNE_define_file:
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// Takes 4 arguments. The first is a null terminated string containing
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// a source file name. The second is an unsigned LEB128 number
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// representing the directory index of the directory in which the file
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// was found. The third is an unsigned LEB128 number representing the
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// time of last modification of the file. The fourth is an unsigned
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// LEB128 number representing the length in bytes of the file. The time
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// and length fields may contain LEB128(0) if the information is not
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// available.
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//
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// The directory index represents an entry in the include_directories
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// section of the statement program prologue. The index is LEB128(0)
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// if the file was found in the current directory of the compilation,
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// LEB128(1) if it was found in the first directory in the
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// include_directories section, and so on. The directory index is
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// ignored for file names that represent full path names.
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//
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// The files are numbered, starting at 1, in the order in which they
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// appear; the names in the prologue come before names defined by
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// the DW_LNE_define_file instruction. These numbers are used in the
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// the file register of the state machine.
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{
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FileNameEntry fileEntry;
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fileEntry.Name = debug_line_data.getCStr(offset_ptr);
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fileEntry.DirIdx = debug_line_data.getULEB128(offset_ptr);
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fileEntry.ModTime = debug_line_data.getULEB128(offset_ptr);
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fileEntry.Length = debug_line_data.getULEB128(offset_ptr);
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Prologue.FileNames.push_back(fileEntry);
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}
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break;
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case DW_LNE_set_discriminator:
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State.Row.Discriminator = debug_line_data.getULEB128(offset_ptr);
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break;
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default:
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// Length doesn't include the zero opcode byte or the length itself, but
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// it does include the sub_opcode, so we have to adjust for that below
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(*offset_ptr) += arg_size;
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break;
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}
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} else if (opcode < Prologue.OpcodeBase) {
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switch (opcode) {
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// Standard Opcodes
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case DW_LNS_copy:
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// Takes no arguments. Append a row to the matrix using the
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// current values of the state-machine registers. Then set
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// the basic_block register to false.
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State.appendRowToMatrix(*offset_ptr);
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break;
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case DW_LNS_advance_pc:
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// Takes a single unsigned LEB128 operand, multiplies it by the
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// min_inst_length field of the prologue, and adds the
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// result to the address register of the state machine.
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State.Row.Address +=
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debug_line_data.getULEB128(offset_ptr) * Prologue.MinInstLength;
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break;
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case DW_LNS_advance_line:
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// Takes a single signed LEB128 operand and adds that value to
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// the line register of the state machine.
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State.Row.Line += debug_line_data.getSLEB128(offset_ptr);
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break;
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case DW_LNS_set_file:
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// Takes a single unsigned LEB128 operand and stores it in the file
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// register of the state machine.
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State.Row.File = debug_line_data.getULEB128(offset_ptr);
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break;
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case DW_LNS_set_column:
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// Takes a single unsigned LEB128 operand and stores it in the
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// column register of the state machine.
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State.Row.Column = debug_line_data.getULEB128(offset_ptr);
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break;
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case DW_LNS_negate_stmt:
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// Takes no arguments. Set the is_stmt register of the state
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// machine to the logical negation of its current value.
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State.Row.IsStmt = !State.Row.IsStmt;
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break;
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case DW_LNS_set_basic_block:
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// Takes no arguments. Set the basic_block register of the
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// state machine to true
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State.Row.BasicBlock = true;
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break;
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case DW_LNS_const_add_pc:
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// Takes no arguments. Add to the address register of the state
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// machine the address increment value corresponding to special
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// opcode 255. The motivation for DW_LNS_const_add_pc is this:
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// when the statement program needs to advance the address by a
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// small amount, it can use a single special opcode, which occupies
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// a single byte. When it needs to advance the address by up to
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// twice the range of the last special opcode, it can use
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// DW_LNS_const_add_pc followed by a special opcode, for a total
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// of two bytes. Only if it needs to advance the address by more
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// than twice that range will it need to use both DW_LNS_advance_pc
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// and a special opcode, requiring three or more bytes.
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{
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uint8_t adjust_opcode = 255 - Prologue.OpcodeBase;
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uint64_t addr_offset =
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(adjust_opcode / Prologue.LineRange) * Prologue.MinInstLength;
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State.Row.Address += addr_offset;
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}
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break;
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case DW_LNS_fixed_advance_pc:
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// Takes a single uhalf operand. Add to the address register of
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// the state machine the value of the (unencoded) operand. This
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// is the only extended opcode that takes an argument that is not
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// a variable length number. The motivation for DW_LNS_fixed_advance_pc
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// is this: existing assemblers cannot emit DW_LNS_advance_pc or
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// special opcodes because they cannot encode LEB128 numbers or
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// judge when the computation of a special opcode overflows and
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// requires the use of DW_LNS_advance_pc. Such assemblers, however,
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// can use DW_LNS_fixed_advance_pc instead, sacrificing compression.
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State.Row.Address += debug_line_data.getU16(offset_ptr);
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break;
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case DW_LNS_set_prologue_end:
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// Takes no arguments. Set the prologue_end register of the
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// state machine to true
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State.Row.PrologueEnd = true;
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break;
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case DW_LNS_set_epilogue_begin:
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// Takes no arguments. Set the basic_block register of the
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// state machine to true
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State.Row.EpilogueBegin = true;
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break;
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case DW_LNS_set_isa:
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// Takes a single unsigned LEB128 operand and stores it in the
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// column register of the state machine.
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State.Row.Isa = debug_line_data.getULEB128(offset_ptr);
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break;
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default:
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// Handle any unknown standard opcodes here. We know the lengths
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// of such opcodes because they are specified in the prologue
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// as a multiple of LEB128 operands for each opcode.
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{
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assert(opcode - 1U < Prologue.StandardOpcodeLengths.size());
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uint8_t opcode_length = Prologue.StandardOpcodeLengths[opcode - 1];
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for (uint8_t i = 0; i < opcode_length; ++i)
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debug_line_data.getULEB128(offset_ptr);
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}
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break;
|
|
}
|
|
} else {
|
|
// Special Opcodes
|
|
|
|
// A special opcode value is chosen based on the amount that needs
|
|
// to be added to the line and address registers. The maximum line
|
|
// increment for a special opcode is the value of the line_base
|
|
// field in the header, plus the value of the line_range field,
|
|
// minus 1 (line base + line range - 1). If the desired line
|
|
// increment is greater than the maximum line increment, a standard
|
|
// opcode must be used instead of a special opcode. The "address
|
|
// advance" is calculated by dividing the desired address increment
|
|
// by the minimum_instruction_length field from the header. The
|
|
// special opcode is then calculated using the following formula:
|
|
//
|
|
// opcode = (desired line increment - line_base) +
|
|
// (line_range * address advance) + opcode_base
|
|
//
|
|
// If the resulting opcode is greater than 255, a standard opcode
|
|
// must be used instead.
|
|
//
|
|
// To decode a special opcode, subtract the opcode_base from the
|
|
// opcode itself to give the adjusted opcode. The amount to
|
|
// increment the address register is the result of the adjusted
|
|
// opcode divided by the line_range multiplied by the
|
|
// minimum_instruction_length field from the header. That is:
|
|
//
|
|
// address increment = (adjusted opcode / line_range) *
|
|
// minimum_instruction_length
|
|
//
|
|
// The amount to increment the line register is the line_base plus
|
|
// the result of the adjusted opcode modulo the line_range. That is:
|
|
//
|
|
// line increment = line_base + (adjusted opcode % line_range)
|
|
|
|
uint8_t adjust_opcode = opcode - Prologue.OpcodeBase;
|
|
uint64_t addr_offset =
|
|
(adjust_opcode / Prologue.LineRange) * Prologue.MinInstLength;
|
|
int32_t line_offset =
|
|
Prologue.LineBase + (adjust_opcode % Prologue.LineRange);
|
|
State.Row.Line += line_offset;
|
|
State.Row.Address += addr_offset;
|
|
State.appendRowToMatrix(*offset_ptr);
|
|
}
|
|
}
|
|
|
|
if (!State.Sequence.Empty) {
|
|
fprintf(stderr, "warning: last sequence in debug line table is not"
|
|
"terminated!\n");
|
|
}
|
|
|
|
// Sort all sequences so that address lookup will work faster.
|
|
if (!Sequences.empty()) {
|
|
std::sort(Sequences.begin(), Sequences.end(), Sequence::orderByLowPC);
|
|
// Note: actually, instruction address ranges of sequences should not
|
|
// overlap (in shared objects and executables). If they do, the address
|
|
// lookup would still work, though, but result would be ambiguous.
|
|
// We don't report warning in this case. For example,
|
|
// sometimes .so compiled from multiple object files contains a few
|
|
// rudimentary sequences for address ranges [0x0, 0xsomething).
|
|
}
|
|
|
|
return end_offset;
|
|
}
|
|
|
|
uint32_t DWARFDebugLine::LineTable::lookupAddress(uint64_t address) const {
|
|
uint32_t unknown_index = UINT32_MAX;
|
|
if (Sequences.empty())
|
|
return unknown_index;
|
|
// First, find an instruction sequence containing the given address.
|
|
DWARFDebugLine::Sequence sequence;
|
|
sequence.LowPC = address;
|
|
SequenceIter first_seq = Sequences.begin();
|
|
SequenceIter last_seq = Sequences.end();
|
|
SequenceIter seq_pos = std::lower_bound(first_seq, last_seq, sequence,
|
|
DWARFDebugLine::Sequence::orderByLowPC);
|
|
DWARFDebugLine::Sequence found_seq;
|
|
if (seq_pos == last_seq) {
|
|
found_seq = Sequences.back();
|
|
} else if (seq_pos->LowPC == address) {
|
|
found_seq = *seq_pos;
|
|
} else {
|
|
if (seq_pos == first_seq)
|
|
return unknown_index;
|
|
found_seq = *(seq_pos - 1);
|
|
}
|
|
if (!found_seq.containsPC(address))
|
|
return unknown_index;
|
|
// Search for instruction address in the rows describing the sequence.
|
|
// Rows are stored in a vector, so we may use arithmetical operations with
|
|
// iterators.
|
|
DWARFDebugLine::Row row;
|
|
row.Address = address;
|
|
RowIter first_row = Rows.begin() + found_seq.FirstRowIndex;
|
|
RowIter last_row = Rows.begin() + found_seq.LastRowIndex;
|
|
RowIter row_pos = std::lower_bound(first_row, last_row, row,
|
|
DWARFDebugLine::Row::orderByAddress);
|
|
if (row_pos == last_row) {
|
|
return found_seq.LastRowIndex - 1;
|
|
}
|
|
uint32_t index = found_seq.FirstRowIndex + (row_pos - first_row);
|
|
if (row_pos->Address > address) {
|
|
if (row_pos == first_row)
|
|
return unknown_index;
|
|
else
|
|
index--;
|
|
}
|
|
return index;
|
|
}
|
|
|
|
bool DWARFDebugLine::LineTable::lookupAddressRange(
|
|
uint64_t address, uint64_t size, std::vector<uint32_t> &result) const {
|
|
if (Sequences.empty())
|
|
return false;
|
|
uint64_t end_addr = address + size;
|
|
// First, find an instruction sequence containing the given address.
|
|
DWARFDebugLine::Sequence sequence;
|
|
sequence.LowPC = address;
|
|
SequenceIter first_seq = Sequences.begin();
|
|
SequenceIter last_seq = Sequences.end();
|
|
SequenceIter seq_pos = std::lower_bound(first_seq, last_seq, sequence,
|
|
DWARFDebugLine::Sequence::orderByLowPC);
|
|
if (seq_pos == last_seq || seq_pos->LowPC != address) {
|
|
if (seq_pos == first_seq)
|
|
return false;
|
|
seq_pos--;
|
|
}
|
|
if (!seq_pos->containsPC(address))
|
|
return false;
|
|
|
|
SequenceIter start_pos = seq_pos;
|
|
|
|
// Add the rows from the first sequence to the vector, starting with the
|
|
// index we just calculated
|
|
|
|
while (seq_pos != last_seq && seq_pos->LowPC < end_addr) {
|
|
DWARFDebugLine::Sequence cur_seq = *seq_pos;
|
|
uint32_t first_row_index;
|
|
uint32_t last_row_index;
|
|
if (seq_pos == start_pos) {
|
|
// For the first sequence, we need to find which row in the sequence is the
|
|
// first in our range. Rows are stored in a vector, so we may use
|
|
// arithmetical operations with iterators.
|
|
DWARFDebugLine::Row row;
|
|
row.Address = address;
|
|
RowIter first_row = Rows.begin() + cur_seq.FirstRowIndex;
|
|
RowIter last_row = Rows.begin() + cur_seq.LastRowIndex;
|
|
RowIter row_pos = std::upper_bound(first_row, last_row, row,
|
|
DWARFDebugLine::Row::orderByAddress);
|
|
// The 'row_pos' iterator references the first row that is greater than
|
|
// our start address. Unless that's the first row, we want to start at
|
|
// the row before that.
|
|
first_row_index = cur_seq.FirstRowIndex + (row_pos - first_row);
|
|
if (row_pos != first_row)
|
|
--first_row_index;
|
|
} else
|
|
first_row_index = cur_seq.FirstRowIndex;
|
|
|
|
// For the last sequence in our range, we need to figure out the last row in
|
|
// range. For all other sequences we can go to the end of the sequence.
|
|
if (cur_seq.HighPC > end_addr) {
|
|
DWARFDebugLine::Row row;
|
|
row.Address = end_addr;
|
|
RowIter first_row = Rows.begin() + cur_seq.FirstRowIndex;
|
|
RowIter last_row = Rows.begin() + cur_seq.LastRowIndex;
|
|
RowIter row_pos = std::upper_bound(first_row, last_row, row,
|
|
DWARFDebugLine::Row::orderByAddress);
|
|
// The 'row_pos' iterator references the first row that is greater than
|
|
// our end address. The row before that is the last row we want.
|
|
last_row_index = cur_seq.FirstRowIndex + (row_pos - first_row) - 1;
|
|
} else
|
|
// Contrary to what you might expect, DWARFDebugLine::SequenceLastRowIndex
|
|
// isn't a valid index within the current sequence. It's that plus one.
|
|
last_row_index = cur_seq.LastRowIndex - 1;
|
|
|
|
for (uint32_t i = first_row_index; i <= last_row_index; ++i) {
|
|
result.push_back(i);
|
|
}
|
|
|
|
++seq_pos;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
DWARFDebugLine::LineTable::getFileNameByIndex(uint64_t FileIndex,
|
|
FileLineInfoKind Kind,
|
|
std::string &Result) const {
|
|
if (FileIndex == 0 || FileIndex > Prologue.FileNames.size() ||
|
|
Kind == FileLineInfoKind::None)
|
|
return false;
|
|
const FileNameEntry &Entry = Prologue.FileNames[FileIndex - 1];
|
|
const char *FileName = Entry.Name;
|
|
if (Kind != FileLineInfoKind::AbsoluteFilePath ||
|
|
sys::path::is_absolute(FileName)) {
|
|
Result = FileName;
|
|
return true;
|
|
}
|
|
SmallString<16> FilePath;
|
|
uint64_t IncludeDirIndex = Entry.DirIdx;
|
|
// Be defensive about the contents of Entry.
|
|
if (IncludeDirIndex > 0 &&
|
|
IncludeDirIndex <= Prologue.IncludeDirectories.size()) {
|
|
const char *IncludeDir = Prologue.IncludeDirectories[IncludeDirIndex - 1];
|
|
sys::path::append(FilePath, IncludeDir);
|
|
}
|
|
sys::path::append(FilePath, FileName);
|
|
Result = FilePath.str();
|
|
return true;
|
|
}
|