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llvm-mirror/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp
Igor Kudrin cde37ff605 [llvm-dwarfdump] Avoid crashing if an abbreviation offset is invalid.
Note that DWARFUnit::getAbbreviations() returns nullptr if the
abbreviations could not be read, but callers used the returned
pointer without checking.

Differential Revision: https://reviews.llvm.org/D85738
2020-08-12 16:01:53 +07:00

42 lines
1.7 KiB
C++

//===-- DWARFCompileUnit.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/DWARFCompileUnit.h"
#include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
#include "llvm/DebugInfo/DWARF/DWARFDie.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
void DWARFCompileUnit::dump(raw_ostream &OS, DIDumpOptions DumpOpts) {
int OffsetDumpWidth = 2 * dwarf::getDwarfOffsetByteSize(getFormat());
OS << format("0x%08" PRIx64, getOffset()) << ": Compile Unit:"
<< " length = " << format("0x%0*" PRIx64, OffsetDumpWidth, getLength())
<< ", format = " << dwarf::FormatString(getFormat())
<< ", version = " << format("0x%04x", getVersion());
if (getVersion() >= 5)
OS << ", unit_type = " << dwarf::UnitTypeString(getUnitType());
OS << ", abbr_offset = " << format("0x%04" PRIx64, getAbbrOffset());
if (!getAbbreviations())
OS << " (invalid)";
OS << ", addr_size = " << format("0x%02x", getAddressByteSize());
if (getVersion() >= 5 && getUnitType() != dwarf::DW_UT_compile)
OS << ", DWO_id = " << format("0x%016" PRIx64, *getDWOId());
OS << " (next unit at " << format("0x%08" PRIx64, getNextUnitOffset())
<< ")\n";
if (DWARFDie CUDie = getUnitDIE(false))
CUDie.dump(OS, 0, DumpOpts);
else
OS << "<compile unit can't be parsed!>\n\n";
}
// VTable anchor.
DWARFCompileUnit::~DWARFCompileUnit() = default;