1 files changed, 82 insertions, 0 deletions
diff --git a/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp b/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp
new file mode 100644
index 000000000000..42daa7cae799
--- /dev/null
+++ b/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp
@@ -0,0 +1,82 @@
+//===- InfoStreamBuilder.cpp - PDB Info Stream Creation ---------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/InfoStreamBuilder.h"
+
+#include "llvm/DebugInfo/MSF/MSFBuilder.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/NamedStreamMap.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFileBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+InfoStreamBuilder::InfoStreamBuilder(msf::MSFBuilder &Msf,
+                                     NamedStreamMap &NamedStreams)
+    : Msf(Msf), Ver(PdbRaw_ImplVer::PdbImplVC70), Age(0),
+      NamedStreams(NamedStreams) {
+  ::memset(&Guid, 0, sizeof(Guid));
+}
+
+void InfoStreamBuilder::setVersion(PdbRaw_ImplVer V) { Ver = V; }
+
+void InfoStreamBuilder::addFeature(PdbRaw_FeatureSig Sig) {
+  Features.push_back(Sig);
+}
+
+void InfoStreamBuilder::setHashPDBContentsToGUID(bool B) {
+  HashPDBContentsToGUID = B;
+}
+
+void InfoStreamBuilder::setAge(uint32_t A) { Age = A; }
+
+void InfoStreamBuilder::setSignature(uint32_t S) { Signature = S; }
+
+void InfoStreamBuilder::setGuid(GUID G) { Guid = G; }
+
+
+Error InfoStreamBuilder::finalizeMsfLayout() {
+  uint32_t Length = sizeof(InfoStreamHeader) +
+                    NamedStreams.calculateSerializedLength() +
+                    (Features.size() + 1) * sizeof(uint32_t);
+  if (auto EC = Msf.setStreamSize(StreamPDB, Length))
+    return EC;
+  return Error::success();
+}
+
+Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
+                                WritableBinaryStreamRef Buffer) const {
+  auto InfoS = WritableMappedBlockStream::createIndexedStream(
+      Layout, Buffer, StreamPDB, Msf.getAllocator());
+  BinaryStreamWriter Writer(*InfoS);
+
+  InfoStreamHeader H;
+  // Leave the build id fields 0 so they can be set as the last step before
+  // committing the file to disk.
+  ::memset(&H, 0, sizeof(H));
+  H.Version = Ver;
+  if (auto EC = Writer.writeObject(H))
+    return EC;
+
+  if (auto EC = NamedStreams.commit(Writer))
+    return EC;
+  if (auto EC = Writer.writeInteger(0))
+    return EC;
+  for (auto E : Features) {
+    if (auto EC = Writer.writeEnum(E))
+      return EC;
+  }
+  assert(Writer.bytesRemaining() == 0);
+  return Error::success();
+}