forked from OSchip/llvm-project
119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
//===- DWARFDebugPubTable.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/DWARFDebugPubTable.h"
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#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/Support/DataExtractor.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/Format.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 DWARFDebugPubTable::extract(
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DWARFDataExtractor Data, bool GnuStyle,
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function_ref<void(Error)> RecoverableErrorHandler) {
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this->GnuStyle = GnuStyle;
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Sets.clear();
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uint64_t Offset = 0;
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while (Data.isValidOffset(Offset)) {
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uint64_t SetOffset = Offset;
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Sets.push_back({});
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Set &NewSet = Sets.back();
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DataExtractor::Cursor C(Offset);
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std::tie(NewSet.Length, NewSet.Format) = Data.getInitialLength(C);
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if (!C) {
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// Drop the newly added set because it does not contain anything useful
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// to dump.
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Sets.pop_back();
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RecoverableErrorHandler(createStringError(
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errc::invalid_argument,
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"name lookup table at offset 0x%" PRIx64 " parsing failed: %s",
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SetOffset, toString(C.takeError()).c_str()));
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return;
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}
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Offset = C.tell() + NewSet.Length;
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DWARFDataExtractor SetData(Data, Offset);
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const unsigned OffsetSize = dwarf::getDwarfOffsetByteSize(NewSet.Format);
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NewSet.Version = SetData.getU16(C);
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NewSet.Offset = SetData.getRelocatedValue(C, OffsetSize);
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NewSet.Size = SetData.getUnsigned(C, OffsetSize);
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if (!C) {
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// Preserve the newly added set because at least some fields of the header
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// are read and can be dumped.
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RecoverableErrorHandler(
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createStringError(errc::invalid_argument,
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"name lookup table at offset 0x%" PRIx64
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" does not have a complete header: %s",
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SetOffset, toString(C.takeError()).c_str()));
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continue;
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}
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while (C) {
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uint64_t DieRef = SetData.getUnsigned(C, OffsetSize);
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if (DieRef == 0)
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break;
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uint8_t IndexEntryValue = GnuStyle ? SetData.getU8(C) : 0;
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StringRef Name = SetData.getCStrRef(C);
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if (C)
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NewSet.Entries.push_back(
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{DieRef, PubIndexEntryDescriptor(IndexEntryValue), Name});
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}
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if (!C) {
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RecoverableErrorHandler(createStringError(
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errc::invalid_argument,
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"name lookup table at offset 0x%" PRIx64 " parsing failed: %s",
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SetOffset, toString(C.takeError()).c_str()));
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continue;
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}
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if (C.tell() != Offset)
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RecoverableErrorHandler(createStringError(
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errc::invalid_argument,
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"name lookup table at offset 0x%" PRIx64
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" has a terminator at offset 0x%" PRIx64
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" before the expected end at 0x%" PRIx64,
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SetOffset, C.tell() - OffsetSize, Offset - OffsetSize));
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}
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}
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void DWARFDebugPubTable::dump(raw_ostream &OS) const {
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for (const Set &S : Sets) {
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int OffsetDumpWidth = 2 * dwarf::getDwarfOffsetByteSize(S.Format);
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OS << "length = " << format("0x%0*" PRIx64, OffsetDumpWidth, S.Length);
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OS << ", format = " << dwarf::FormatString(S.Format);
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OS << ", version = " << format("0x%04x", S.Version);
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OS << ", unit_offset = "
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<< format("0x%0*" PRIx64, OffsetDumpWidth, S.Offset);
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OS << ", unit_size = " << format("0x%0*" PRIx64, OffsetDumpWidth, S.Size)
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<< '\n';
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OS << (GnuStyle ? "Offset Linkage Kind Name\n"
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: "Offset Name\n");
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for (const Entry &E : S.Entries) {
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OS << format("0x%0*" PRIx64 " ", OffsetDumpWidth, E.SecOffset);
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if (GnuStyle) {
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StringRef EntryLinkage =
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GDBIndexEntryLinkageString(E.Descriptor.Linkage);
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StringRef EntryKind = dwarf::GDBIndexEntryKindString(E.Descriptor.Kind);
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OS << format("%-8s", EntryLinkage.data()) << ' '
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<< format("%-8s", EntryKind.data()) << ' ';
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}
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OS << '\"' << E.Name << "\"\n";
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}
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}
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}
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