Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 190 insertions, 0 deletions

diff --git a/Source/WebKit2/WebProcess/WebKitMain.cpp b/Source/WebKit2/WebProcess/WebKitMain.cpp
new file mode 100644
index 000000000..03a8cb5c5
--- /dev/null
+++ b/Source/WebKit2/WebProcess/WebKitMain.cpp
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "CommandLine.h"
+
+#include "PluginProcessMain.h"
+#include "ProcessLauncher.h"
+#include "WebProcessMain.h"
+#include <wtf/text/CString.h>
+
+#if PLATFORM(MAC)
+#include <objc/objc-auto.h>
+#elif PLATFORM(WIN)
+#include <shlwapi.h>
+#endif
+
+using namespace WebKit;
+
+static int WebKitMain(const CommandLine& commandLine)
+{
+    ProcessLauncher::ProcessType processType;    
+    if (!ProcessLauncher::getProcessTypeFromString(commandLine["type"].utf8().data(), processType))
+        return EXIT_FAILURE;
+
+    switch (processType) {
+        case ProcessLauncher::WebProcess:
+            return WebProcessMain(commandLine);
+        case ProcessLauncher::PluginProcess:
+#if ENABLE(PLUGIN_PROCESS)
+            return PluginProcessMain(commandLine);
+#else
+            break;
+#endif
+    }
+
+    return EXIT_FAILURE;
+}
+
+#if PLATFORM(MAC)
+
+extern "C" WK_EXPORT int WebKitMain(int argc, char** argv);
+
+int WebKitMain(int argc, char** argv)
+{
+    ASSERT(!objc_collectingEnabled());
+    
+    CommandLine commandLine;
+    if (!commandLine.parse(argc, argv))
+        return EXIT_FAILURE;
+    
+    return WebKitMain(commandLine);
+}
+
+#elif PLATFORM(WIN)
+
+static void enableDataExecutionPrevention()
+{
+    // Enable Data Execution prevention at runtime rather than via /NXCOMPAT
+    // 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
+
+    const DWORD enableDEP = 0x00000001;
+
+    HMODULE hMod = ::GetModuleHandleW(L"Kernel32.dll");
+    if (!hMod)
+        return;
+
+    typedef BOOL (WINAPI *PSETDEP)(DWORD);
+
+    PSETDEP procSet = reinterpret_cast<PSETDEP>(::GetProcAddress(hMod, "SetProcessDEPPolicy"));
+    if (!procSet)
+        return;
+
+    // Enable Data Execution Prevention, but allow ATL thunks (for compatibility with the version of ATL that ships with the Platform SDK).
+    procSet(enableDEP);
+}
+
+static void enableTerminationOnHeapCorruption()
+{
+    // Enable termination on heap corruption on OSes that support it (Vista and XPSP3).
+    // http://msdn.microsoft.com/en-us/library/aa366705(VS.85).aspx
+
+    const HEAP_INFORMATION_CLASS heapEnableTerminationOnCorruption = static_cast<HEAP_INFORMATION_CLASS>(1);
+
+    HMODULE hMod = ::GetModuleHandleW(L"kernel32.dll");
+    if (!hMod)
+        return;
+
+    typedef BOOL (WINAPI*HSI)(HANDLE, HEAP_INFORMATION_CLASS, PVOID, SIZE_T);
+    HSI heapSetInformation = reinterpret_cast<HSI>(::GetProcAddress(hMod, "HeapSetInformation"));
+    if (!heapSetInformation)
+        return;
+
+    heapSetInformation(0, heapEnableTerminationOnCorruption, 0, 0);
+}
+
+static void disableUserModeCallbackExceptionFilter()
+{
+    const DWORD PROCESS_CALLBACK_FILTER_ENABLED = 0x1;
+    typedef BOOL (NTAPI *getProcessUserModeExceptionPolicyPtr)(LPDWORD lpFlags);
+    typedef BOOL (NTAPI *setProcessUserModeExceptionPolicyPtr)(DWORD dwFlags);
+
+    HMODULE lib = LoadLibrary(TEXT("kernel32.dll"));
+    ASSERT(lib);
+
+    getProcessUserModeExceptionPolicyPtr getPolicyPtr = (getProcessUserModeExceptionPolicyPtr)GetProcAddress(lib, "GetProcessUserModeExceptionPolicy");
+    setProcessUserModeExceptionPolicyPtr setPolicyPtr = (setProcessUserModeExceptionPolicyPtr)GetProcAddress(lib, "SetProcessUserModeExceptionPolicy");
+
+    DWORD dwFlags;
+    if (!getPolicyPtr || !setPolicyPtr || !getPolicyPtr(&dwFlags)) {
+        FreeLibrary(lib);
+        return;
+    }
+
+    // If this flag isn't cleared, exceptions that are thrown when running in a 64-bit version of
+    // Windows are ignored, possibly leaving Safari in an inconsistent state that could cause an 
+    // unrelated exception to be thrown.
+    // http://support.microsoft.com/kb/976038
+    // http://blog.paulbetts.org/index.php/2010/07/20/the-case-of-the-disappearing-onload-exception-user-mode-callback-exceptions-in-x64/
+    setPolicyPtr(dwFlags & ~PROCESS_CALLBACK_FILTER_ENABLED);
+
+    FreeLibrary(lib);
+}
+
+#ifndef NDEBUG
+static void pauseProcessIfNeeded(HMODULE module)
+{
+    // Show an alert when Ctrl-Alt-Shift is held down during launch to give the user time to attach a
+    // debugger. This is useful for debugging problems that happen early in the web process's lifetime.
+    const unsigned short highBitMaskShort = 0x8000;
+    if (!getenv("WEBKIT2_PAUSE_WEB_PROCESS_ON_LAUNCH") && !((::GetKeyState(VK_CONTROL) & highBitMaskShort) && (::GetKeyState(VK_MENU) & highBitMaskShort) && (::GetKeyState(VK_SHIFT) & highBitMaskShort)))
+        return;
+
+    wchar_t path[MAX_PATH];
+    DWORD length = ::GetModuleFileNameW(module, path, WTF_ARRAY_LENGTH(path));
+    if (!length || length == WTF_ARRAY_LENGTH(path))
+        return;
+
+    wchar_t* startOfFilename = ::PathFindFileNameW(path);
+    String filenameString(startOfFilename, length - (startOfFilename - path));
+
+    String message = L"You can now attach a debugger to " + filenameString + L". You can use the same debugger for " + filenameString + L" and the UI process, if desired. Click OK when you are ready for " + filenameString + L" to continue.";
+    String title = filenameString + L" has launched";
+    ::MessageBoxW(0, message.charactersWithNullTermination(), title.charactersWithNullTermination(), MB_OK | MB_ICONINFORMATION);
+}
+#endif
+
+extern "C" __declspec(dllexport) 
+int WebKitMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpstrCmdLine, int nCmdShow)
+{
+#ifndef NDEBUG
+    pauseProcessIfNeeded(hInstance);
+#endif
+
+    enableDataExecutionPrevention();
+
+    enableTerminationOnHeapCorruption();
+
+    disableUserModeCallbackExceptionFilter();
+
+    CommandLine commandLine;
+    if (!commandLine.parse(lpstrCmdLine))
+        return EXIT_FAILURE;
+
+    return WebKitMain(commandLine);
+}
+
+#endif