109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
//===- DWARFDebugMacro.cpp ------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/DWARF/DWARFDebugMacro.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/Support/WithColor.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstdint>
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using namespace llvm;
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using namespace dwarf;
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void DWARFDebugMacro::dump(raw_ostream &OS) const {
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unsigned IndLevel = 0;
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for (const auto &Macros : MacroLists) {
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OS << format("0x%08" PRIx64 ":\n", Macros.Offset);
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for (const Entry &E : Macros.Macros) {
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// There should not be DW_MACINFO_end_file when IndLevel is Zero. However,
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// this check handles the case of corrupted ".debug_macinfo" section.
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if (IndLevel > 0)
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IndLevel -= (E.Type == DW_MACINFO_end_file);
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// Print indentation.
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for (unsigned I = 0; I < IndLevel; I++)
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OS << " ";
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IndLevel += (E.Type == DW_MACINFO_start_file);
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WithColor(OS, HighlightColor::Macro).get() << MacinfoString(E.Type);
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switch (E.Type) {
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default:
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// Got a corrupted ".debug_macinfo" section (invalid macinfo type).
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break;
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case DW_MACINFO_define:
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case DW_MACINFO_undef:
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OS << " - lineno: " << E.Line;
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OS << " macro: " << E.MacroStr;
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break;
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case DW_MACINFO_start_file:
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OS << " - lineno: " << E.Line;
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OS << " filenum: " << E.File;
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break;
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case DW_MACINFO_end_file:
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break;
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case DW_MACINFO_vendor_ext:
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OS << " - constant: " << E.ExtConstant;
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OS << " string: " << E.ExtStr;
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break;
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}
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OS << "\n";
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}
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}
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}
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void DWARFDebugMacro::parse(DataExtractor data) {
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uint64_t Offset = 0;
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MacroList *M = nullptr;
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while (data.isValidOffset(Offset)) {
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if (!M) {
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MacroLists.emplace_back();
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M = &MacroLists.back();
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M->Offset = Offset;
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}
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// A macro list entry consists of:
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M->Macros.emplace_back();
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Entry &E = M->Macros.back();
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// 1. Macinfo type
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E.Type = data.getULEB128(&Offset);
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if (E.Type == 0) {
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// Reached end of a ".debug_macinfo" section contribution.
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M = nullptr;
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continue;
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}
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switch (E.Type) {
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default:
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// Got a corrupted ".debug_macinfo" section (invalid macinfo type).
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// Push the corrupted entry to the list and halt parsing.
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E.Type = DW_MACINFO_invalid;
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return;
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case DW_MACINFO_define:
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case DW_MACINFO_undef:
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// 2. Source line
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E.Line = data.getULEB128(&Offset);
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// 3. Macro string
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E.MacroStr = data.getCStr(&Offset);
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break;
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case DW_MACINFO_start_file:
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// 2. Source line
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E.Line = data.getULEB128(&Offset);
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// 3. Source file id
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E.File = data.getULEB128(&Offset);
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break;
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case DW_MACINFO_end_file:
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break;
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case DW_MACINFO_vendor_ext:
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// 2. Vendor extension constant
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E.ExtConstant = data.getULEB128(&Offset);
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// 3. Vendor extension string
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E.ExtStr = data.getCStr(&Offset);
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break;
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}
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}
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}
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