Refactor raw pdb dumper into library

PDB parsing code was hand-rolled into llvm-pdbdump. This patch moves the
parsing of this code into DebugInfoPDB and makes the dumper use this.

This is achieved by implementing the skeleton of RawPdbSession, the
non-DIA counterpart to the existing PDB read interface. None of the type /
source file / etc information is accessible yet, so this implementation is
not yet close to achieving parity with the DIA counterpart, but the
RawSession class simply holds a reference to a PDBFile class which handles
parsing the file format. Additionally a PDBStream class is introduced
which allows accessing the bytes of a particular stream in a PDB file.

Differential Revision: http://reviews.llvm.org/D19343
Reviewed By: majnemer

llvm-svn: 267049

1 files changed, 7 insertions, 2 deletions

diff --git a/llvm/lib/DebugInfo/PDB/PDB.cpp b/llvm/lib/DebugInfo/PDB/PDB.cpp
index bb40942..723d1d2 100644
--- a/llvm/lib/DebugInfo/PDB/PDB.cpp
+++ b/llvm/lib/DebugInfo/PDB/PDB.cpp
@@ -17,23 +17,28 @@
 #if HAVE_DIA_SDK
 #include "llvm/DebugInfo/PDB/DIA/DIASession.h"
 #endif
+#include "llvm/DebugInfo/PDB/Raw/RawSession.h"
 
 using namespace llvm;
 
 PDB_ErrorCode llvm::loadDataForPDB(PDB_ReaderType Type, StringRef Path,
                                    std::unique_ptr<IPDBSession> &Session) {
   // Create the correct concrete instance type based on the value of Type.
+  if (Type == PDB_ReaderType::Raw)
+    return RawSession::createFromPdb(Path, Session);
+
 #if HAVE_DIA_SDK
   return DIASession::createFromPdb(Path, Session);
 #endif
-  return PDB_ErrorCode::NoDiaSupport;
 }
 
 PDB_ErrorCode llvm::loadDataForEXE(PDB_ReaderType Type, StringRef Path,
                                    std::unique_ptr<IPDBSession> &Session) {
   // Create the correct concrete instance type based on the value of Type.
+  if (Type == PDB_ReaderType::Raw)
+    return RawSession::createFromExe(Path, Session);
+
 #if HAVE_DIA_SDK
   return DIASession::createFromExe(Path, Session);
 #endif
-  return PDB_ErrorCode::NoDiaSupport;
 }