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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "content/child/npapi/plugin_lib.h"
      6 
      7 #include "base/strings/string_util.h"
      8 #include "base/strings/utf_string_conversions.h"
      9 #include "build/build_config.h"
     10 #include "testing/gtest/include/gtest/gtest.h"
     11 
     12 namespace content {
     13 
     14 // Test the unloading of plugin libs. Bug http://crbug.com/46526 showed that
     15 // if UnloadAllPlugins() simply iterates through the g_loaded_libs global
     16 // variable, we can get a crash if no plugin libs were marked as always loaded.
     17 class PluginLibTest : public PluginLib {
     18  public:
     19   PluginLibTest() : PluginLib(WebPluginInfo()) {}
     20   using PluginLib::Unload;
     21 
     22  protected:
     23   virtual ~PluginLibTest() {}
     24 };
     25 
     26 TEST(PluginLibLoading, UnloadAllPlugins) {
     27   // For the creation of the g_loaded_libs global variable.
     28   ASSERT_EQ(static_cast<PluginLibTest*>(NULL),
     29       PluginLibTest::CreatePluginLib(base::FilePath()));
     30 
     31   // Try with a single plugin lib.
     32   scoped_refptr<PluginLibTest> plugin_lib1(new PluginLibTest());
     33   PluginLib::UnloadAllPlugins();
     34 
     35   // Need to create it again, it should have been destroyed above.
     36   ASSERT_EQ(static_cast<PluginLibTest*>(NULL),
     37       PluginLibTest::CreatePluginLib(base::FilePath()));
     38 
     39   // Try with two plugin libs.
     40   plugin_lib1 = new PluginLibTest();
     41   scoped_refptr<PluginLibTest> plugin_lib2(new PluginLibTest());
     42   PluginLib::UnloadAllPlugins();
     43 
     44   // Need to create it again, it should have been destroyed above.
     45   ASSERT_EQ(static_cast<PluginLibTest*>(NULL),
     46       PluginLibTest::CreatePluginLib(base::FilePath()));
     47 
     48   // Now try to manually Unload one and then UnloadAll.
     49   plugin_lib1 = new PluginLibTest();
     50   plugin_lib2 = new PluginLibTest();
     51   plugin_lib1->Unload();
     52   PluginLib::UnloadAllPlugins();
     53 
     54   // Need to create it again, it should have been destroyed above.
     55   ASSERT_EQ(static_cast<PluginLibTest*>(NULL),
     56       PluginLibTest::CreatePluginLib(base::FilePath()));
     57 
     58   // Now try to manually Unload the only one and then UnloadAll.
     59   plugin_lib1 = new PluginLibTest();
     60   plugin_lib1->Unload();
     61   PluginLib::UnloadAllPlugins();
     62 }
     63 
     64 }  // namespace content
     65