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 "config.h"
27 #include "CommandLine.h"
28
29 #include "PluginProcessMain.h"
30 #include "ProcessLauncher.h"
31 #include "WebProcessMain.h"
32 #include <wtf/text/CString.h>
33
34 #if PLATFORM(MAC)
35 #include <objc/objc-auto.h>
36 #endif
37
38 using namespace WebKit;
39
WebKitMain(const CommandLine & commandLine)40 static int WebKitMain(const CommandLine& commandLine)
41 {
42 ProcessLauncher::ProcessType processType;
43 if (!ProcessLauncher::getProcessTypeFromString(commandLine["type"].utf8().data(), processType))
44 return EXIT_FAILURE;
45
46 switch (processType) {
47 case ProcessLauncher::WebProcess:
48 return WebProcessMain(commandLine);
49 case ProcessLauncher::PluginProcess:
50 #if ENABLE(PLUGIN_PROCESS)
51 return PluginProcessMain(commandLine);
52 #else
53 break;
54 #endif
55 }
56
57 return EXIT_FAILURE;
58 }
59
60 #if PLATFORM(MAC)
61
62 extern "C" WK_EXPORT int WebKitMain(int argc, char** argv);
63
WebKitMain(int argc,char ** argv)64 int WebKitMain(int argc, char** argv)
65 {
66 ASSERT(!objc_collectingEnabled());
67
68 CommandLine commandLine;
69 if (!commandLine.parse(argc, argv))
70 return EXIT_FAILURE;
71
72 return WebKitMain(commandLine);
73 }
74
75 #elif PLATFORM(WIN)
76
77 #ifndef DEBUG_ALL
78 #define PROCESS_NAME L"WebKit2WebKitProcess.exe"
79 #else
80 #define PROCESS_NAME L"WebKit2WebProcess_debug.exe"
81 #endif
82
enableDataExecutionPrevention()83 static void enableDataExecutionPrevention()
84 {
85 // Enable Data Execution prevention at runtime rather than via /NXCOMPAT
86 // http://blogs.msdn.com/michael_howard/archive/2008/01/29/new-nx-apis-added-to-windows-vista-sp1-windows-xp-sp3-and-windows-server-2008.aspx
87
88 const DWORD enableDEP = 0x00000001;
89
90 HMODULE hMod = ::GetModuleHandleW(L"Kernel32.dll");
91 if (!hMod)
92 return;
93
94 typedef BOOL (WINAPI *PSETDEP)(DWORD);
95
96 PSETDEP procSet = reinterpret_cast<PSETDEP>(::GetProcAddress(hMod, "SetProcessDEPPolicy"));
97 if (!procSet)
98 return;
99
100 // Enable Data Execution Prevention, but allow ATL thunks (for compatibility with the version of ATL that ships with the Platform SDK).
101 procSet(enableDEP);
102 }
103
enableTerminationOnHeapCorruption()104 static void enableTerminationOnHeapCorruption()
105 {
106 // Enable termination on heap corruption on OSes that support it (Vista and XPSP3).
107 // http://msdn.microsoft.com/en-us/library/aa366705(VS.85).aspx
108
109 const HEAP_INFORMATION_CLASS heapEnableTerminationOnCorruption = static_cast<HEAP_INFORMATION_CLASS>(1);
110
111 HMODULE hMod = ::GetModuleHandleW(L"kernel32.dll");
112 if (!hMod)
113 return;
114
115 typedef BOOL (WINAPI*HSI)(HANDLE, HEAP_INFORMATION_CLASS, PVOID, SIZE_T);
116 HSI heapSetInformation = reinterpret_cast<HSI>(::GetProcAddress(hMod, "HeapSetInformation"));
117 if (!heapSetInformation)
118 return;
119
120 heapSetInformation(0, heapEnableTerminationOnCorruption, 0, 0);
121 }
122
disableUserModeCallbackExceptionFilter()123 static void disableUserModeCallbackExceptionFilter()
124 {
125 const DWORD PROCESS_CALLBACK_FILTER_ENABLED = 0x1;
126 typedef BOOL (NTAPI *getProcessUserModeExceptionPolicyPtr)(LPDWORD lpFlags);
127 typedef BOOL (NTAPI *setProcessUserModeExceptionPolicyPtr)(DWORD dwFlags);
128
129 HMODULE lib = LoadLibrary(TEXT("kernel32.dll"));
130 ASSERT(lib);
131
132 getProcessUserModeExceptionPolicyPtr getPolicyPtr = (getProcessUserModeExceptionPolicyPtr)GetProcAddress(lib, "GetProcessUserModeExceptionPolicy");
133 setProcessUserModeExceptionPolicyPtr setPolicyPtr = (setProcessUserModeExceptionPolicyPtr)GetProcAddress(lib, "SetProcessUserModeExceptionPolicy");
134
135 DWORD dwFlags;
136 if (!getPolicyPtr || !setPolicyPtr || !getPolicyPtr(&dwFlags)) {
137 FreeLibrary(lib);
138 return;
139 }
140
141 // If this flag isn't cleared, exceptions that are thrown when running in a 64-bit version of
142 // Windows are ignored, possibly leaving Safari in an inconsistent state that could cause an
143 // unrelated exception to be thrown.
144 // http://support.microsoft.com/kb/976038
145 // http://blog.paulbetts.org/index.php/2010/07/20/the-case-of-the-disappearing-onload-exception-user-mode-callback-exceptions-in-x64/
146 setPolicyPtr(dwFlags & ~PROCESS_CALLBACK_FILTER_ENABLED);
147
148 FreeLibrary(lib);
149 }
150
151 extern "C" __declspec(dllexport)
WebKitMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPTSTR lpstrCmdLine,int nCmdShow)152 int WebKitMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpstrCmdLine, int nCmdShow)
153 {
154 #ifndef NDEBUG
155 // Show an alert when Ctrl-Alt-Shift is held down during launch to give the user time to attach a
156 // debugger. This is useful for debugging problems that happen early in the web process's lifetime.
157 const unsigned short highBitMaskShort = 0x8000;
158 if (getenv("WEBKIT2_PAUSE_WEB_PROCESS_ON_LAUNCH") || (::GetKeyState(VK_CONTROL) & highBitMaskShort) && (::GetKeyState(VK_MENU) & highBitMaskShort) && (::GetKeyState(VK_SHIFT) & highBitMaskShort))
159 ::MessageBoxW(0, L"You can now attach a debugger to " PROCESS_NAME L". You can use\nthe same debugger for WebKit2WebProcessand the UI process, if desired.\nClick OK when you are ready for WebKit2WebProcess to continue.", L"WebKit2WebProcess has launched", MB_OK | MB_ICONINFORMATION);
160 #endif
161
162 enableDataExecutionPrevention();
163
164 enableTerminationOnHeapCorruption();
165
166 disableUserModeCallbackExceptionFilter();
167
168 CommandLine commandLine;
169 if (!commandLine.parse(lpstrCmdLine))
170 return EXIT_FAILURE;
171
172 return WebKitMain(commandLine);
173 }
174
175 #endif
176