Stack sampling profiler: handle unloaded and unloading modules

base/scoped_native_library.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_SCOPED_NATIVE_LIBRARY_H_
 #define BASE_SCOPED_NATIVE_LIBRARY_H_
 
 #include "base/base_export.h"
 #include "base/native_library.h"
 
@@ skipping 13 matching lines @@
   explicit ScopedNativeLibrary(NativeLibrary library);
 
   // Opens the given library and manages its lifetime.
   explicit ScopedNativeLibrary(const FilePath& library_path);
 
   ~ScopedNativeLibrary();
 
   // Returns true if there's a valid library loaded.
   bool is_valid() const { return !!library_; }
 
+  NativeLibrary get() const { return library_; }
+
   void* GetFunctionPointer(const char* function_name) const;
 
   // Takes ownership of the given library handle. Any existing handle will
   // be freed.
   void Reset(NativeLibrary library);
 
   // Returns the native library handle and removes it from this object. The
   // caller must manage the lifetime of the handle.
   NativeLibrary Release();
 
  private:
   NativeLibrary library_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedNativeLibrary);
 };
 
 }  // namespace base
 
 #endif  // BASE_SCOPED_NATIVE_LIBRARY_H_