1// Copyright 2014 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/*
6 * Copyright (C) 2010 Apple Inc. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "PluginTest.h"
31
32#include "PluginObject.h"
33
34using namespace std;
35
36// Passing null for our NPP_GetValue function pointer should not crash.
37
38class NullNPPGetValuePointer : public PluginTest {
39public:
40    NullNPPGetValuePointer(NPP, const string& identifier);
41
42private:
43    virtual NPError NPP_Destroy(NPSavedData**) OVERRIDE;
44    virtual NPError NPP_GetValue(NPPVariable, void* value) OVERRIDE;
45
46    NPP_GetValueProcPtr m_originalNPPGetValuePointer;
47};
48
49static PluginTest::Register<NullNPPGetValuePointer> registrar("null-npp-getvalue-pointer");
50
51NullNPPGetValuePointer::NullNPPGetValuePointer(NPP npp, const string& identifier)
52    : PluginTest(npp, identifier)
53    , m_originalNPPGetValuePointer(pluginFunctions->getvalue)
54{
55    // Be sneaky and null out the getvalue pointer the browser is holding. This simulates a plugin
56    // that doesn't implement NPP_GetValue (like Shockwave Director 10.3 on Windows). Note that if
57    // WebKit copies the NPPluginFuncs struct this technique will have no effect and WebKit will
58    // call into our NPP_GetValue implementation.
59    pluginFunctions->getvalue = 0;
60}
61
62NPError NullNPPGetValuePointer::NPP_Destroy(NPSavedData**)
63{
64    // Set the NPP_GetValue pointer back the way it was before we mucked with it so we don't mess
65    // up future uses of the plugin module.
66    pluginFunctions->getvalue = m_originalNPPGetValuePointer;
67    return NPERR_NO_ERROR;
68}
69
70NPError NullNPPGetValuePointer::NPP_GetValue(NPPVariable, void*)
71{
72    pluginLog(m_npp, "NPP_GetValue was called but should not have been. Maybe WebKit copied the NPPluginFuncs struct, which would invalidate this test.");
73    return NPERR_GENERIC_ERROR;
74}
75