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