contrib/llvm/tools/llvm-pdbdump/C13DebugFragmentVisitor.cpp

   1 //===- C13DebugFragmentVisitor.cpp -------------------------------*- C++-*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "C13DebugFragmentVisitor.h"
  11
  12 #include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
  13 #include "llvm/DebugInfo/CodeView/DebugInlineeLinesSubsection.h"
  14 #include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h"
  15 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
  16 #include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
  17 #include "llvm/DebugInfo/PDB/Native/RawError.h"
  18
  19 using namespace llvm;
  20 using namespace llvm::codeview;
  21 using namespace llvm::pdb;
  22
  23 C13DebugFragmentVisitor::C13DebugFragmentVisitor(PDBFile &F) : F(F) {}
  24
  25 C13DebugFragmentVisitor::~C13DebugFragmentVisitor() {}
  26
  27 Error C13DebugFragmentVisitor::visitUnknown(
  28     codeview::DebugUnknownSubsectionRef &Fragment) {
  29   return Error::success();
  30 }
  31
  32 Error C13DebugFragmentVisitor::visitFileChecksums(
  33     codeview::DebugChecksumsSubsectionRef &Checksums) {
  34   assert(!this->Checksums.hasValue());
  35   this->Checksums = Checksums;
  36   return Error::success();
  37 }
  38
  39 Error C13DebugFragmentVisitor::visitLines(
  40     codeview::DebugLinesSubsectionRef &Lines) {
  41   this->Lines.push_back(Lines);
  42   return Error::success();
  43 }
  44
  45 Error C13DebugFragmentVisitor::visitInlineeLines(
  46     codeview::DebugInlineeLinesSubsectionRef &Lines) {
  47   this->InlineeLines.push_back(Lines);
  48   return Error::success();
  49 }
  50
  51 Error C13DebugFragmentVisitor::finished() {
  52   if (!Checksums.hasValue()) {
  53     assert(Lines.empty());
  54     return Error::success();
  55   }
  56   if (auto EC = handleFileChecksums())
  57     return EC;
  58
  59   if (auto EC = handleLines())
  60     return EC;
  61
  62   if (auto EC = handleInlineeLines())
  63     return EC;
  64
  65   return Error::success();
  66 }
  67
  68 Expected<StringRef>
  69 C13DebugFragmentVisitor::getNameFromStringTable(uint32_t Offset) {
  70   auto ST = F.getStringTable();
  71   if (!ST)
  72     return ST.takeError();
  73
  74   return ST->getStringForID(Offset);
  75 }
  76
  77 Expected<StringRef>
  78 C13DebugFragmentVisitor::getNameFromChecksumsBuffer(uint32_t Offset) {
  79   assert(Checksums.hasValue());
  80
  81   auto Array = Checksums->getArray();
  82   auto ChecksumIter = Array.at(Offset);
  83   if (ChecksumIter == Array.end())
  84     return make_error<RawError>(raw_error_code::invalid_format);
  85   const auto &Entry = *ChecksumIter;
  86   return getNameFromStringTable(Entry.FileNameOffset);
  87 }