contrib/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp

   1 //===- InfoStreamBuilder.cpp - PDB Info Stream Creation ---------*- 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 "llvm/DebugInfo/PDB/Native/InfoStreamBuilder.h"
  11
  12 #include "llvm/DebugInfo/MSF/MSFBuilder.h"
  13 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
  14 #include "llvm/DebugInfo/PDB/Native/InfoStream.h"
  15 #include "llvm/DebugInfo/PDB/Native/NamedStreamMap.h"
  16 #include "llvm/DebugInfo/PDB/Native/PDBFileBuilder.h"
  17 #include "llvm/DebugInfo/PDB/Native/RawError.h"
  18 #include "llvm/DebugInfo/PDB/Native/RawTypes.h"
  19 #include "llvm/Support/BinaryStreamWriter.h"
  20
  21 using namespace llvm;
  22 using namespace llvm::codeview;
  23 using namespace llvm::msf;
  24 using namespace llvm::pdb;
  25
  26 InfoStreamBuilder::InfoStreamBuilder(msf::MSFBuilder &Msf,
  27                                      NamedStreamMap &NamedStreams)
  28     : Msf(Msf), Ver(PdbRaw_ImplVer::PdbImplVC70), Age(0),
  29       NamedStreams(NamedStreams) {
  30   ::memset(&Guid, 0, sizeof(Guid));
  31 }
  32
  33 void InfoStreamBuilder::setVersion(PdbRaw_ImplVer V) { Ver = V; }
  34
  35 void InfoStreamBuilder::addFeature(PdbRaw_FeatureSig Sig) {
  36   Features.push_back(Sig);
  37 }
  38
  39 void InfoStreamBuilder::setHashPDBContentsToGUID(bool B) {
  40   HashPDBContentsToGUID = B;
  41 }
  42
  43 void InfoStreamBuilder::setAge(uint32_t A) { Age = A; }
  44
  45 void InfoStreamBuilder::setSignature(uint32_t S) { Signature = S; }
  46
  47 void InfoStreamBuilder::setGuid(GUID G) { Guid = G; }
  48
  49
  50 Error InfoStreamBuilder::finalizeMsfLayout() {
  51   uint32_t Length = sizeof(InfoStreamHeader) +
  52                     NamedStreams.calculateSerializedLength() +
  53                     (Features.size() + 1) * sizeof(uint32_t);
  54   if (auto EC = Msf.setStreamSize(StreamPDB, Length))
  55     return EC;
  56   return Error::success();
  57 }
  58
  59 Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
  60                                 WritableBinaryStreamRef Buffer) const {
  61   auto InfoS = WritableMappedBlockStream::createIndexedStream(
  62       Layout, Buffer, StreamPDB, Msf.getAllocator());
  63   BinaryStreamWriter Writer(*InfoS);
  64
  65   InfoStreamHeader H;
  66   // Leave the build id fields 0 so they can be set as the last step before
  67   // committing the file to disk.
  68   ::memset(&H, 0, sizeof(H));
  69   H.Version = Ver;
  70   if (auto EC = Writer.writeObject(H))
  71     return EC;
  72
  73   if (auto EC = NamedStreams.commit(Writer))
  74     return EC;
  75   if (auto EC = Writer.writeInteger(0))
  76     return EC;
  77   for (auto E : Features) {
  78     if (auto EC = Writer.writeEnum(E))
  79       return EC;
  80   }
  81   assert(Writer.bytesRemaining() == 0);
  82   return Error::success();
  83 }