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#include "llvm/Support/TimeProfiler.h"
18
19using namespace llvm;
20using namespace llvm::codeview;
21using namespace llvm::msf;
22using namespace llvm::pdb;
23
24InfoStreamBuilder::InfoStreamBuilder(msf::MSFBuilder &Msf,
25 NamedStreamMap &NamedStreams)
26 : Msf(Msf), Ver(PdbRaw_ImplVer::PdbImplVC70), Age(0),
27 NamedStreams(NamedStreams) {
28 ::memset(s: &Guid, c: 0, n: sizeof(Guid));
29}
30
31void InfoStreamBuilder::setVersion(PdbRaw_ImplVer V) { Ver = V; }
32
33void InfoStreamBuilder::addFeature(PdbRaw_FeatureSig Sig) {
34 Features.push_back(x: Sig);
35}
36
37void InfoStreamBuilder::setHashPDBContentsToGUID(bool B) {
38 HashPDBContentsToGUID = B;
39}
40
41void InfoStreamBuilder::setAge(uint32_t A) { Age = A; }
42
43void InfoStreamBuilder::setSignature(uint32_t S) { Signature = S; }
44
45void InfoStreamBuilder::setGuid(GUID G) { Guid = G; }
46
47
48Error InfoStreamBuilder::finalizeMsfLayout() {
49 uint32_t Length = sizeof(InfoStreamHeader) +
50 NamedStreams.calculateSerializedLength() +
51 (Features.size() + 1) * sizeof(uint32_t);
52 if (auto EC = Msf.setStreamSize(Idx: StreamPDB, Size: Length))
53 return EC;
54 return Error::success();
55}
56
57Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
58 WritableBinaryStreamRef Buffer) const {
59 llvm::TimeTraceScope timeScope("Commit info stream");
60 auto InfoS = WritableMappedBlockStream::createIndexedStream(
61 Layout, MsfData: Buffer, StreamIndex: StreamPDB, Allocator&: 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(s: &H, c: 0, n: sizeof(H));
68 H.Version = Ver;
69 if (auto EC = Writer.writeObject(Obj: H))
70 return EC;
71
72 if (auto EC = NamedStreams.commit(Writer))
73 return EC;
74 if (auto EC = Writer.writeInteger(Value: 0))
75 return EC;
76 for (auto E : Features) {
77 if (auto EC = Writer.writeEnum(Num: E))
78 return EC;
79 }
80 assert(Writer.bytesRemaining() == 0);
81 return Error::success();
82}
83

source code of llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp