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/*
* Copyright (C) 2012 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.
*/
#import <AvailabilityMacros.h>
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
#import <crt_externs.h>
#import <dlfcn.h>
#import <mach-o/dyld.h>
#import <spawn.h>
#import <stdio.h>
#import <stdlib.h>
#import <xpc/xpc.h>
extern "C" mach_port_t xpc_dictionary_copy_mach_send(xpc_object_t, const char*);
static void WebProcessServiceForWebKitDevelopmentEventHandler(xpc_connection_t peer)
{
xpc_connection_set_target_queue(peer, dispatch_get_main_queue());
xpc_connection_set_event_handler(peer, ^(xpc_object_t event) {
xpc_type_t type = xpc_get_type(event);
if (type == XPC_TYPE_ERROR) {
if (event == XPC_ERROR_CONNECTION_INVALID || event == XPC_ERROR_TERMINATION_IMMINENT) {
// FIXME: Handle this case more gracefully.
exit(EXIT_FAILURE);
}
} else {
assert(type == XPC_TYPE_DICTIONARY);
if (!strcmp(xpc_dictionary_get_string(event, "message-name"), "re-exec")) {
// Setup the posix_spawn attributes.
posix_spawnattr_t attr;
posix_spawnattr_init(&attr);
short flags = 0;
// We just want to set the process state, not actually launch a new process,
// so we are going to use the darwin extension to posix_spawn POSIX_SPAWN_SETEXEC
// to act like a more full featured exec.
flags |= POSIX_SPAWN_SETEXEC;
// We want our process to receive all signals.
sigset_t signalMaskSet;
sigemptyset(&signalMaskSet);
posix_spawnattr_setsigmask(&attr, &signalMaskSet);
flags |= POSIX_SPAWN_SETSIGMASK;
// Set the architecture.
cpu_type_t cpuTypes[] = { (cpu_type_t)xpc_dictionary_get_uint64(event, "architecture") };
size_t outCount = 0;
posix_spawnattr_setbinpref_np(&attr, 1, cpuTypes, &outCount);
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
static const int allowExecutableHeapFlag = 0x2000;
if (xpc_dictionary_get_bool(event, "executable-heap"))
flags |= allowExecutableHeapFlag;
#endif
posix_spawnattr_setflags(&attr, flags);
char path[4 * PATH_MAX];
uint32_t pathLength = sizeof(path);
_NSGetExecutablePath(path, &pathLength);
// Setup the command line.
char** argv = *_NSGetArgv();
const char* programName = argv[0];
const char* args[] = { programName, 0 };
// Setup the environment.
xpc_object_t environmentArray = xpc_dictionary_get_value(event, "environment");
size_t numberOfEnvironmentVariables = xpc_array_get_count(environmentArray);
char** environment = (char**)malloc(numberOfEnvironmentVariables * sizeof(char*) + 1);
for (size_t i = 0; i < numberOfEnvironmentVariables; ++i) {
const char* string = xpc_array_get_string(environmentArray, i);
size_t stringLength = strlen(string);
char* environmentVariable = (char*)malloc(stringLength + 1);
memcpy(environmentVariable, string, stringLength);
environmentVariable[stringLength] = '\0';
environment[i] = environmentVariable;
}
environment[numberOfEnvironmentVariables] = 0;
pid_t processIdentifier = 0;
posix_spawn(&processIdentifier, path, 0, &attr, const_cast<char**>(args), environment);
posix_spawnattr_destroy(&attr);
NSLog(@"Unable to re-exec for path: %s\n", path);
exit(EXIT_FAILURE);
}
if (!strcmp(xpc_dictionary_get_string(event, "message-name"), "bootstrap")) {
static void* frameworkLibrary = dlopen(xpc_dictionary_get_string(event, "framework-executable-path"), RTLD_NOW);
if (!frameworkLibrary) {
NSLog(@"Unable to load WebKit2.framework: %s\n", dlerror());
exit(EXIT_FAILURE);
}
typedef void (*InitializeWebProcessFunction)(const char* clientIdentifer, xpc_connection_t connection, mach_port_t serverPort);
InitializeWebProcessFunction InitializeWebProcessFunctionPtr = reinterpret_cast<InitializeWebProcessFunction>(dlsym(frameworkLibrary, "InitializeWebProcessForWebProcessServiceForWebKitDevelopment"));
if (!InitializeWebProcessFunctionPtr) {
NSLog(@"Unable to find entry point in WebKit2.framework: %s\n", dlerror());
exit(EXIT_FAILURE);
}
xpc_object_t reply = xpc_dictionary_create_reply(event);
xpc_dictionary_set_string(reply, "message-name", "process-finished-launching");
xpc_connection_send_message(xpc_dictionary_get_remote_connection(event), reply);
xpc_release(reply);
InitializeWebProcessFunctionPtr(xpc_dictionary_get_string(event, "client-identifier"), peer, xpc_dictionary_copy_mach_send(event, "server-port"));
}
}
});
xpc_connection_resume(peer);
}
int main(int argc, char** argv)
{
xpc_main(WebProcessServiceForWebKitDevelopmentEventHandler);
return 0;;
}
#else
int main(int argc, char** argv)
{
return 0;
}
#endif
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