Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/lib/DebugInfo/PDB/PDB.cpp

@@ -0,0 +1,55 @@
+//===- PDB.cpp - base header file for creating a PDB reader ---------------===//
+//
+//                     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/PDB.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Config/config.h"
+#include "llvm/DebugInfo/PDB/GenericError.h"
+#if LLVM_ENABLE_DIA_SDK
+#include "llvm/DebugInfo/PDB/DIA/DIASession.h"
+#endif
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+Error llvm::pdb::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::Native) {
+    ErrorOr<std::unique_ptr<MemoryBuffer>> ErrorOrBuffer =
+        MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
+                                     /*RequiresNullTerminator=*/false);
+    if (!ErrorOrBuffer)
+      return make_error<GenericError>(generic_error_code::invalid_path, Path);
+
+    return NativeSession::createFromPdb(std::move(*ErrorOrBuffer), Session);
+  }
+
+#if LLVM_ENABLE_DIA_SDK
+  return DIASession::createFromPdb(Path, Session);
+#else
+  return make_error<GenericError>("DIA is not installed on the system");
+#endif
+}
+
+Error llvm::pdb::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::Native)
+    return NativeSession::createFromExe(Path, Session);
+
+#if LLVM_ENABLE_DIA_SDK
+  return DIASession::createFromExe(Path, Session);
+#else
+  return make_error<GenericError>("DIA is not installed on the system");
+#endif
+}