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/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
* Portions Copyright (c) 2010 Motorola Mobility, 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 MOTOROLA 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 MOTOROLA 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 "ProcessLauncher.h"
#include "Connection.h"
#include "RunLoop.h"
#include <WebCore/FileSystem.h>
#include <WebCore/ResourceHandle.h>
#include <errno.h>
#if OS(LINUX)
#include <sys/prctl.h>
#endif
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
#include <wtf/gobject/GOwnPtr.h>
#include <wtf/gobject/GlibUtilities.h>
#ifdef SOCK_SEQPACKET
#define SOCKET_TYPE SOCK_SEQPACKET
#else
#define SOCKET_TYPE SOCK_STREAM
#endif
using namespace WebCore;
namespace WebKit {
const char* gWebKitWebProcessName = "WebKitWebProcess";
const char* gWebKitPluginProcessName = "WebKitPluginProcess";
static void childSetupFunction(gpointer userData)
{
int socket = GPOINTER_TO_INT(userData);
close(socket);
#if OS(LINUX)
// Kill child process when parent dies.
prctl(PR_SET_PDEATHSIG, SIGKILL);
#endif
}
static void childFinishedFunction(GPid, gint status, gpointer userData)
{
if (WIFEXITED(status) && !WEXITSTATUS(status))
return;
close(GPOINTER_TO_INT(userData));
}
static CString findWebKitProcess(const char* processName)
{
const char* execDirectory = g_getenv("WEBKIT_EXEC_PATH");
if (execDirectory) {
String processPath = pathByAppendingComponent(filenameToString(execDirectory), processName);
if (fileExists(processPath))
return fileSystemRepresentation(processPath);
}
static bool gotExecutablePath = false;
static String executablePath;
if (!gotExecutablePath) {
gotExecutablePath = true;
CString executableFile = getCurrentExecutablePath();
if (!executableFile.isNull())
executablePath = directoryName(filenameToString(executableFile.data()));
}
if (!executablePath.isNull()) {
String processPath = pathByAppendingComponent(executablePath, processName);
if (fileExists(processPath))
return fileSystemRepresentation(processPath);
}
return fileSystemRepresentation(pathByAppendingComponent(filenameToString(LIBEXECDIR), processName));
}
void ProcessLauncher::launchProcess()
{
GPid pid = 0;
int sockets[2];
if (socketpair(AF_UNIX, SOCKET_TYPE, 0, sockets) < 0) {
g_printerr("Creation of socket failed: %s.\n", g_strerror(errno));
ASSERT_NOT_REACHED();
return;
}
CString binaryPath = findWebKitProcess(m_launchOptions.processType == ProcessLauncher::WebProcess ? gWebKitWebProcessName : gWebKitPluginProcessName);
GOwnPtr<gchar> socket(g_strdup_printf("%d", sockets[0]));
char* argv[3];
argv[0] = const_cast<char*>(binaryPath.data());
argv[1] = socket.get();
argv[2] = 0;
GOwnPtr<GError> error;
int spawnFlags = G_SPAWN_LEAVE_DESCRIPTORS_OPEN | G_SPAWN_DO_NOT_REAP_CHILD;
if (!g_spawn_async(0, argv, 0, static_cast<GSpawnFlags>(spawnFlags), childSetupFunction, GINT_TO_POINTER(sockets[1]), &pid, &error.outPtr())) {
g_printerr("Unable to fork a new WebProcess: %s.\n", error->message);
ASSERT_NOT_REACHED();
}
close(sockets[0]);
m_processIdentifier = pid;
// Monitor the child process, it calls waitpid to prevent the child process from becomming a zombie,
// and it allows us to close the socket when the child process crashes.
g_child_watch_add(m_processIdentifier, childFinishedFunction, GINT_TO_POINTER(sockets[1]));
// We've finished launching the process, message back to the main run loop.
RunLoop::main()->dispatch(bind(&ProcessLauncher::didFinishLaunchingProcess, this, m_processIdentifier, sockets[1]));
}
void ProcessLauncher::terminateProcess()
{
if (!m_processIdentifier)
return;
kill(m_processIdentifier, SIGKILL);
}
void ProcessLauncher::platformInvalidate()
{
}
} // namespace WebKit
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