1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "PluginTest.h"
27
28#include "PluginObject.h"
29
30using namespace std;
31
32// Passing null for our NPP_GetValue function pointer should not crash.
33
34class NullNPPGetValuePointer : public PluginTest {
35public:
36    NullNPPGetValuePointer(NPP, const string& identifier);
37
38private:
39    virtual NPError NPP_Destroy(NPSavedData**);
40    virtual NPError NPP_GetValue(NPPVariable, void* value);
41
42    NPP_GetValueProcPtr m_originalNPPGetValuePointer;
43};
44
45static PluginTest::Register<NullNPPGetValuePointer> registrar("null-npp-getvalue-pointer");
46
47NullNPPGetValuePointer::NullNPPGetValuePointer(NPP npp, const string& identifier)
48    : PluginTest(npp, identifier)
49    , m_originalNPPGetValuePointer(pluginFunctions->getvalue)
50{
51    // Be sneaky and null out the getvalue pointer the browser is holding. This simulates a plugin
52    // that doesn't implement NPP_GetValue (like Shockwave Director 10.3 on Windows). Note that if
53    // WebKit copies the NPPluginFuncs struct this technique will have no effect and WebKit will
54    // call into our NPP_GetValue implementation.
55    pluginFunctions->getvalue = 0;
56}
57
58NPError NullNPPGetValuePointer::NPP_Destroy(NPSavedData**)
59{
60    // Set the NPP_GetValue pointer back the way it was before we mucked with it so we don't mess
61    // up future uses of the plugin module.
62    pluginFunctions->getvalue = m_originalNPPGetValuePointer;
63    return NPERR_NO_ERROR;
64}
65
66NPError NullNPPGetValuePointer::NPP_GetValue(NPPVariable, void*)
67{
68    pluginLog(m_npp, "NPP_GetValue was called but should not have been. Maybe WebKit copied the NPPluginFuncs struct, which would invalidate this test.");
69    return NPERR_GENERIC_ERROR;
70}
71