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::setAge(uint32_t A) { Age = A; }
  36
  37 void InfoStreamBuilder::setSignature(uint32_t S) { Signature = S; }
  38
  39 void InfoStreamBuilder::setGuid(GUID G) { Guid = G; }
  40
  41 void InfoStreamBuilder::addFeature(PdbRaw_FeatureSig Sig) {
  42   Features.push_back(Sig);
  43 }
  44
  45 Error InfoStreamBuilder::finalizeMsfLayout() {
  46   uint32_t Length = sizeof(InfoStreamHeader) +
  47                     NamedStreams.calculateSerializedLength() +
  48                     (Features.size() + 1) * sizeof(uint32_t);
  49   if (auto EC = Msf.setStreamSize(StreamPDB, Length))
  50     return EC;
  51   return Error::success();
  52 }
  53
  54 Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
  55                                 WritableBinaryStreamRef Buffer) const {
  56   auto InfoS = WritableMappedBlockStream::createIndexedStream(
  57       Layout, Buffer, StreamPDB, Msf.getAllocator());
  58   BinaryStreamWriter Writer(*InfoS);
  59
  60   InfoStreamHeader H;
  61   // Leave the build id fields 0 so they can be set as the last step before
  62   // committing the file to disk.
  63   ::memset(&H, 0, sizeof(H));
  64   H.Version = Ver;
  65   if (auto EC = Writer.writeObject(H))
  66     return EC;
  67
  68   if (auto EC = NamedStreams.commit(Writer))
  69     return EC;
  70   if (auto EC = Writer.writeInteger(0))
  71     return EC;
  72   for (auto E : Features) {
  73     if (auto EC = Writer.writeEnum(E))
  74       return EC;
  75   }
  76   assert(Writer.bytesRemaining() == 0);
  77   return Error::success();
  78 }