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      1 //===- InfoStreamBuilder.cpp - PDB Info Stream Creation ---------*- C++ -*-===//
      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/PDB/Native/InfoStreamBuilder.h"
     10 
     11 #include "llvm/DebugInfo/MSF/MSFBuilder.h"
     12 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
     13 #include "llvm/DebugInfo/PDB/Native/InfoStream.h"
     14 #include "llvm/DebugInfo/PDB/Native/NamedStreamMap.h"
     15 #include "llvm/DebugInfo/PDB/Native/PDBFileBuilder.h"
     16 #include "llvm/DebugInfo/PDB/Native/RawError.h"
     17 #include "llvm/DebugInfo/PDB/Native/RawTypes.h"
     18 #include "llvm/Support/BinaryStreamWriter.h"
     19 
     20 using namespace llvm;
     21 using namespace llvm::codeview;
     22 using namespace llvm::msf;
     23 using namespace llvm::pdb;
     24 
     25 InfoStreamBuilder::InfoStreamBuilder(msf::MSFBuilder &Msf,
     26                                      NamedStreamMap &NamedStreams)
     27     : Msf(Msf), Ver(PdbRaw_ImplVer::PdbImplVC70), Age(0),
     28       NamedStreams(NamedStreams) {
     29   ::memset(&Guid, 0, sizeof(Guid));
     30 }
     31 
     32 void InfoStreamBuilder::setVersion(PdbRaw_ImplVer V) { Ver = V; }
     33 
     34 void InfoStreamBuilder::addFeature(PdbRaw_FeatureSig Sig) {
     35   Features.push_back(Sig);
     36 }
     37 
     38 void InfoStreamBuilder::setHashPDBContentsToGUID(bool B) {
     39   HashPDBContentsToGUID = B;
     40 }
     41 
     42 void InfoStreamBuilder::setAge(uint32_t A) { Age = A; }
     43 
     44 void InfoStreamBuilder::setSignature(uint32_t S) { Signature = S; }
     45 
     46 void InfoStreamBuilder::setGuid(GUID G) { Guid = G; }
     47 
     48 
     49 Error InfoStreamBuilder::finalizeMsfLayout() {
     50   uint32_t Length = sizeof(InfoStreamHeader) +
     51                     NamedStreams.calculateSerializedLength() +
     52                     (Features.size() + 1) * sizeof(uint32_t);
     53   if (auto EC = Msf.setStreamSize(StreamPDB, Length))
     54     return EC;
     55   return Error::success();
     56 }
     57 
     58 Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
     59                                 WritableBinaryStreamRef Buffer) const {
     60   auto InfoS = WritableMappedBlockStream::createIndexedStream(
     61       Layout, Buffer, StreamPDB, Msf.getAllocator());
     62   BinaryStreamWriter Writer(*InfoS);
     63 
     64   InfoStreamHeader H;
     65   // Leave the build id fields 0 so they can be set as the last step before
     66   // committing the file to disk.
     67   ::memset(&H, 0, sizeof(H));
     68   H.Version = Ver;
     69   if (auto EC = Writer.writeObject(H))
     70     return EC;
     71 
     72   if (auto EC = NamedStreams.commit(Writer))
     73     return EC;
     74   if (auto EC = Writer.writeInteger(0))
     75     return EC;
     76   for (auto E : Features) {
     77     if (auto EC = Writer.writeEnum(E))
     78       return EC;
     79   }
     80   assert(Writer.bytesRemaining() == 0);
     81   return Error::success();
     82 }
     83