lib/DebugInfo/DWARF/DWARFDebugPubTable.cpp

   1 //===- DWARFDebugPubTable.cpp ---------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/DebugInfo/DWARF/DWARFDebugPubTable.h"
  10 #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
  11 #include "llvm/ADT/StringRef.h"
  12 #include "llvm/BinaryFormat/Dwarf.h"
  13 #include "llvm/Support/DataExtractor.h"
  14 #include "llvm/Support/Format.h"
  15 #include "llvm/Support/raw_ostream.h"
  16 #include <cstdint>
  17
  18 using namespace llvm;
  19 using namespace dwarf;
  20
  21 DWARFDebugPubTable::DWARFDebugPubTable(const DWARFObject &Obj,
  22                                        const DWARFSection &Sec,
  23                                        bool LittleEndian, bool GnuStyle)
  24     : GnuStyle(GnuStyle) {
  25   DWARFDataExtractor PubNames(Obj, Sec, LittleEndian, 0);
  26   uint64_t Offset = 0;
  27   while (PubNames.isValidOffset(Offset)) {
  28     Sets.push_back({});
  29     Set &SetData = Sets.back();
  30
  31     SetData.Length = PubNames.getU32(&Offset);
  32     SetData.Version = PubNames.getU16(&Offset);
  33     SetData.Offset = PubNames.getRelocatedValue(4, &Offset);
  34     SetData.Size = PubNames.getU32(&Offset);
  35
  36     while (Offset < Sec.Data.size()) {
  37       uint32_t DieRef = PubNames.getU32(&Offset);
  38       if (DieRef == 0)
  39         break;
  40       uint8_t IndexEntryValue = GnuStyle ? PubNames.getU8(&Offset) : 0;
  41       StringRef Name = PubNames.getCStrRef(&Offset);
  42       SetData.Entries.push_back(
  43           {DieRef, PubIndexEntryDescriptor(IndexEntryValue), Name});
  44     }
  45   }
  46 }
  47
  48 void DWARFDebugPubTable::dump(raw_ostream &OS) const {
  49   for (const Set &S : Sets) {
  50     OS << "length = " << format("0x%08x", S.Length);
  51     OS << " version = " << format("0x%04x", S.Version);
  52     OS << " unit_offset = " << format("0x%08" PRIx64, S.Offset);
  53     OS << " unit_size = " << format("0x%08x", S.Size) << '\n';
  54     OS << (GnuStyle ? "Offset     Linkage  Kind     Name\n"
  55                     : "Offset     Name\n");
  56
  57     for (const Entry &E : S.Entries) {
  58       OS << format("0x%8.8" PRIx64 " ", E.SecOffset);
  59       if (GnuStyle) {
  60         StringRef EntryLinkage =
  61             GDBIndexEntryLinkageString(E.Descriptor.Linkage);
  62         StringRef EntryKind = dwarf::GDBIndexEntryKindString(E.Descriptor.Kind);
  63         OS << format("%-8s", EntryLinkage.data()) << ' '
  64            << format("%-8s", EntryKind.data()) << ' ';
  65       }
  66       OS << '\"' << E.Name << "\"\n";
  67     }
  68   }
  69 }