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//===- DWARFDebugMacro.cpp ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/DWARF/DWARFDebugMacro.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdint>
using namespace llvm;
using namespace dwarf;
void DWARFDebugMacro::dump(raw_ostream &OS) const {
unsigned IndLevel = 0;
for (const Entry &E : Macros) {
// There should not be DW_MACINFO_end_file when IndLevel is Zero. However,
// this check handles the case of corrupted ".debug_macinfo" section.
if (IndLevel > 0)
IndLevel -= (E.Type == DW_MACINFO_end_file);
// Print indentation.
for (unsigned I = 0; I < IndLevel; I++)
OS << " ";
IndLevel += (E.Type == DW_MACINFO_start_file);
WithColor(OS, HighlightColor::Macro).get() << MacinfoString(E.Type);
switch (E.Type) {
default:
// Got a corrupted ".debug_macinfo" section (invalid macinfo type).
break;
case DW_MACINFO_define:
case DW_MACINFO_undef:
OS << " - lineno: " << E.Line;
OS << " macro: " << E.MacroStr;
break;
case DW_MACINFO_start_file:
OS << " - lineno: " << E.Line;
OS << " filenum: " << E.File;
break;
case DW_MACINFO_end_file:
break;
case DW_MACINFO_vendor_ext:
OS << " - constant: " << E.ExtConstant;
OS << " string: " << E.ExtStr;
break;
}
OS << "\n";
}
}
void DWARFDebugMacro::parse(DataExtractor data) {
uint32_t Offset = 0;
while (data.isValidOffset(Offset)) {
// A macro list entry consists of:
Entry E;
// 1. Macinfo type
E.Type = data.getULEB128(&Offset);
if (E.Type == 0) {
// Reached end of ".debug_macinfo" section.
return;
}
switch (E.Type) {
default:
// Got a corrupted ".debug_macinfo" section (invalid macinfo type).
// Push the corrupted entry to the list and halt parsing.
E.Type = DW_MACINFO_invalid;
Macros.push_back(E);
return;
case DW_MACINFO_define:
case DW_MACINFO_undef:
// 2. Source line
E.Line = data.getULEB128(&Offset);
// 3. Macro string
E.MacroStr = data.getCStr(&Offset);
break;
case DW_MACINFO_start_file:
// 2. Source line
E.Line = data.getULEB128(&Offset);
// 3. Source file id
E.File = data.getULEB128(&Offset);
break;
case DW_MACINFO_end_file:
break;
case DW_MACINFO_vendor_ext:
// 2. Vendor extension constant
E.ExtConstant = data.getULEB128(&Offset);
// 3. Vendor extension string
E.ExtStr = data.getCStr(&Offset);
break;
}
Macros.push_back(E);
}
}
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