[pdb] added support for dumping globals stream

Summary: This adds support for dumping the globals stream from PDB files using llvm-pdbdump, similar to the support we have for the publics stream.

Reviewers: ruiu, zturner

Subscribers: beanz, mgorny, modocache

Differential Revision: https://reviews.llvm.org/D25801

llvm-svn: 284861

1 files changed, 46 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/PDB/Raw/GlobalsStream.cpp b/llvm/lib/DebugInfo/PDB/Raw/GlobalsStream.cpp
new file mode 100644
index 00000000000..c5184525d62
--- /dev/null
+++ b/llvm/lib/DebugInfo/PDB/Raw/GlobalsStream.cpp
@@ -0,0 +1,46 @@
+//===- GlobalsStream.cpp - PDB Index of Symbols by Name ---- ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Raw/GlobalsStream.h"
+
+#include "GSI.h"
+#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Raw/RawError.h"
+#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
+
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+
+using namespace llvm;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+GlobalsStream::GlobalsStream(std::unique_ptr<MappedBlockStream> Stream)
+    : Stream(std::move(Stream)) {}
+
+GlobalsStream::~GlobalsStream() {}
+
+Error GlobalsStream::reload() {
+  StreamReader Reader(*Stream);
+
+  const GSIHashHeader *HashHdr;
+  if (auto EC = readGSIHashHeader(HashHdr, Reader))
+    return EC;
+
+  if (auto EC = readGSIHashRecords(HashRecords, HashHdr, Reader))
+    return EC;
+
+  if (auto EC = readGSIHashBuckets(HashBuckets, HashHdr, Reader))
+    return EC;
+  NumBuckets = HashBuckets.size();
+
+  return Error::success();
+}
+
+Error GlobalsStream::commit() { return Error::success(); }