ProcessLauncherMac.mm [plain text]
/*
* Copyright (C) 2010-2014 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 "config.h"
#import "ProcessLauncher.h"
#import "DynamicLinkerEnvironmentExtractor.h"
#import "EnvironmentVariables.h"
#import "WebKitSystemInterface.h"
#import <WebCore/SoftLinking.h>
#import <crt_externs.h>
#import <mach-o/dyld.h>
#import <mach/machine.h>
#import <servers/bootstrap.h>
#import <spawn.h>
#import <sys/param.h>
#import <sys/stat.h>
#import <wtf/PassRefPtr.h>
#import <wtf/RetainPtr.h>
#import <wtf/RunLoop.h>
#import <wtf/Threading.h>
#import <wtf/text/CString.h>
#import <wtf/text/WTFString.h>
#import <xpc/xpc.h>
#if __has_include(<xpc/private.h>)
#import <xpc/private.h>
#endif
// FIXME: We should be doing this another way.
extern "C" kern_return_t bootstrap_register2(mach_port_t, name_t, mach_port_t, uint64_t);
extern "C" void xpc_connection_set_instance(xpc_connection_t, uuid_t);
extern "C" void xpc_dictionary_set_mach_send(xpc_object_t, const char*, mach_port_t);
#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 10100
extern "C" void xpc_connection_set_bootstrap(xpc_connection_t connection, xpc_object_t bootstrap);
// FIXME: Soft linking is temporary, make this into a regular function call once this function is available everywhere we need.
SOFT_LINK_FRAMEWORK(CoreFoundation)
SOFT_LINK_OPTIONAL(CoreFoundation, _CFBundleSetupXPCBootstrap, void, unused, (xpc_object_t))
#endif
namespace WebKit {
namespace {
struct UUIDHolder : public RefCounted<UUIDHolder> {
static PassRefPtr<UUIDHolder> create()
{
return adoptRef(new UUIDHolder);
}
UUIDHolder()
{
uuid_generate(uuid);
}
uuid_t uuid;
};
}
static void setUpTerminationNotificationHandler(pid_t pid)
{
dispatch_source_t processDiedSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_PROC, pid, DISPATCH_PROC_EXIT, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0));
dispatch_source_set_event_handler(processDiedSource, ^{
int status;
waitpid(dispatch_source_get_handle(processDiedSource), &status, 0);
dispatch_source_cancel(processDiedSource);
});
dispatch_source_set_cancel_handler(processDiedSource, ^{
dispatch_release(processDiedSource);
});
dispatch_resume(processDiedSource);
}
static void addDYLDEnvironmentAdditions(const ProcessLauncher::LaunchOptions& launchOptions, bool isWebKitDevelopmentBuild, EnvironmentVariables& environmentVariables)
{
DynamicLinkerEnvironmentExtractor environmentExtractor([[NSBundle mainBundle] executablePath], _NSGetMachExecuteHeader()->cputype);
environmentExtractor.getExtractedEnvironmentVariables(environmentVariables);
NSBundle *webKitBundle = [NSBundle bundleWithIdentifier:@"com.apple.WebKit"];
NSString *frameworksPath = [[webKitBundle bundlePath] stringByDeletingLastPathComponent];
// To make engineering builds work, if the path is outside of /System set up
// DYLD_FRAMEWORK_PATH to pick up other frameworks, but don't do it for the
// production configuration because it involves extra file system access.
if (isWebKitDevelopmentBuild)
environmentVariables.appendValue("DYLD_FRAMEWORK_PATH", [frameworksPath fileSystemRepresentation], ':');
NSString *processShimPathNSString = nil;
#if ENABLE(NETSCAPE_PLUGIN_API)
if (launchOptions.processType == ProcessLauncher::PluginProcess) {
NSString *processPath = [webKitBundle pathForAuxiliaryExecutable:@"PluginProcess.app"];
NSString *processAppExecutablePath = [[NSBundle bundleWithPath:processPath] executablePath];
processShimPathNSString = [[processAppExecutablePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"PluginProcessShim.dylib"];
} else
#endif // ENABLE(NETSCAPE_PLUGIN_API)
#if ENABLE(NETWORK_PROCESS)
if (launchOptions.processType == ProcessLauncher::NetworkProcess) {
NSString *processPath = [webKitBundle pathForAuxiliaryExecutable:@"NetworkProcess.app"];
NSString *processAppExecutablePath = [[NSBundle bundleWithPath:processPath] executablePath];
processShimPathNSString = [[processAppExecutablePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"SecItemShim.dylib"];
} else
#endif // ENABLE(NETWORK_PROCESS)
if (launchOptions.processType == ProcessLauncher::WebProcess) {
NSString *processPath = [webKitBundle pathForAuxiliaryExecutable:@"WebProcess.app"];
NSString *processAppExecutablePath = [[NSBundle bundleWithPath:processPath] executablePath];
processShimPathNSString = [[processAppExecutablePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"WebProcessShim.dylib"];
}
// Make sure that the shim library file exists and insert it.
if (processShimPathNSString) {
const char* processShimPath = [processShimPathNSString fileSystemRepresentation];
struct stat statBuf;
if (stat(processShimPath, &statBuf) == 0 && (statBuf.st_mode & S_IFMT) == S_IFREG)
environmentVariables.appendValue("DYLD_INSERT_LIBRARIES", processShimPath, ':');
}
}
typedef void (ProcessLauncher::*DidFinishLaunchingProcessFunction)(PlatformProcessIdentifier, IPC::Connection::Identifier);
static const char* serviceName(const ProcessLauncher::LaunchOptions& launchOptions, bool forDevelopment)
{
switch (launchOptions.processType) {
case ProcessLauncher::WebProcess:
if (forDevelopment)
return "com.apple.WebKit.WebContent.Development";
return "com.apple.WebKit.WebContent";
#if ENABLE(NETWORK_PROCESS)
case ProcessLauncher::NetworkProcess:
if (forDevelopment)
return "com.apple.WebKit.Networking.Development";
return "com.apple.WebKit.Networking";
#endif
#if ENABLE(DATABASE_PROCESS)
case ProcessLauncher::DatabaseProcess:
if (forDevelopment)
return "com.apple.WebKit.Databases.Development";
return "com.apple.WebKit.Databases";
#endif
#if ENABLE(NETSCAPE_PLUGIN_API)
case ProcessLauncher::PluginProcess:
if (forDevelopment)
return "com.apple.WebKit.Plugin.Development";
// FIXME: Support plugins that require an executable heap.
if (launchOptions.architecture == CPU_TYPE_X86)
return "com.apple.WebKit.Plugin.32";
if (launchOptions.architecture == CPU_TYPE_X86_64)
return "com.apple.WebKit.Plugin.64";
ASSERT_NOT_REACHED();
return 0;
#endif
}
}
static bool shouldLeakBoost(const ProcessLauncher::LaunchOptions& launchOptions)
{
#if PLATFORM(IOS)
// On iOS, leak a boost onto all child processes
UNUSED_PARAM(launchOptions);
return true;
#elif ENABLE(NETWORK_PROCESS)
// On Mac, leak a boost onto the NetworkProcess.
return launchOptions.processType == ProcessLauncher::NetworkProcess;
#else
UNUSED_PARAM(launchOptions);
return false;
#endif
}
static void connectToService(const ProcessLauncher::LaunchOptions& launchOptions, bool forDevelopment, ProcessLauncher* that, DidFinishLaunchingProcessFunction didFinishLaunchingProcessFunction, UUIDHolder* instanceUUID)
{
// Create a connection to the WebKit XPC service.
auto connection = IPC::adoptXPC(xpc_connection_create(serviceName(launchOptions, forDevelopment), 0));
xpc_connection_set_instance(connection.get(), instanceUUID->uuid);
#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 10100
// Inherit UI process localization. It can be different from child process default localization:
// 1. When the application and system frameworks simply have different localized resources available, we should match the application.
// 1.1. An important case is WebKitTestRunner, where we should use English localizations for all system frameworks.
// 2. When AppleLanguages is passed as command line argument for UI process, or set in its preferences, we should respect it in child processes.
RetainPtr<CFStringRef> localization = adoptCF(WKCopyCFLocalizationPreferredName(0));
if (localization && _CFBundleSetupXPCBootstrapPtr()) {
auto initializationMessage = IPC::adoptXPC(xpc_dictionary_create(nullptr, nullptr, 0));
_CFBundleSetupXPCBootstrapPtr()(initializationMessage.get());
xpc_connection_set_bootstrap(connection.get(), initializationMessage.get());
}
#endif
// XPC requires having an event handler, even if it is not used.
xpc_connection_set_event_handler(connection.get(), ^(xpc_object_t event) { });
xpc_connection_resume(connection.get());
if (shouldLeakBoost(launchOptions)) {
auto preBootstrapMessage = IPC::adoptXPC(xpc_dictionary_create(nullptr, nullptr, 0));
xpc_dictionary_set_string(preBootstrapMessage.get(), "message-name", "pre-bootstrap");
xpc_connection_send_message(connection.get(), preBootstrapMessage.get());
}
// Create the listening port.
mach_port_t listeningPort;
mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &listeningPort);
// Insert a send right so we can send to it.
mach_port_insert_right(mach_task_self(), listeningPort, listeningPort, MACH_MSG_TYPE_MAKE_SEND);
NSString *bundleIdentifier = [[NSBundle mainBundle] bundleIdentifier];
CString clientIdentifier = bundleIdentifier ? String([[NSBundle mainBundle] bundleIdentifier]).utf8() : *_NSGetProgname();
// FIXME: Switch to xpc_connection_set_bootstrap once it's available everywhere we need.
auto bootstrapMessage = IPC::adoptXPC(xpc_dictionary_create(nullptr, nullptr, 0));
xpc_dictionary_set_string(bootstrapMessage.get(), "message-name", "bootstrap");
xpc_dictionary_set_string(bootstrapMessage.get(), "framework-executable-path", [[[NSBundle bundleWithIdentifier:@"com.apple.WebKit"] executablePath] fileSystemRepresentation]);
xpc_dictionary_set_mach_send(bootstrapMessage.get(), "server-port", listeningPort);
xpc_dictionary_set_string(bootstrapMessage.get(), "client-identifier", clientIdentifier.data());
xpc_dictionary_set_string(bootstrapMessage.get(), "ui-process-name", [[[NSProcessInfo processInfo] processName] UTF8String]);
if (forDevelopment) {
xpc_dictionary_set_fd(bootstrapMessage.get(), "stdout", STDOUT_FILENO);
xpc_dictionary_set_fd(bootstrapMessage.get(), "stderr", STDERR_FILENO);
}
auto extraInitializationData = IPC::adoptXPC(xpc_dictionary_create(nullptr, nullptr, 0));
for (const auto& keyValuePair : launchOptions.extraInitializationData)
xpc_dictionary_set_string(extraInitializationData.get(), keyValuePair.key.utf8().data(), keyValuePair.value.utf8().data());
xpc_dictionary_set_value(bootstrapMessage.get(), "extra-initialization-data", extraInitializationData.get());
that->ref();
xpc_connection_send_message_with_reply(connection.get(), bootstrapMessage.get(), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(xpc_object_t reply) {
xpc_type_t type = xpc_get_type(reply);
if (type == XPC_TYPE_ERROR) {
// We failed to launch. Release the send right.
mach_port_deallocate(mach_task_self(), listeningPort);
// And the receive right.
mach_port_mod_refs(mach_task_self(), listeningPort, MACH_PORT_RIGHT_RECEIVE, -1);
RunLoop::main().dispatch(bind(didFinishLaunchingProcessFunction, that, 0, IPC::Connection::Identifier()));
} else {
ASSERT(type == XPC_TYPE_DICTIONARY);
ASSERT(!strcmp(xpc_dictionary_get_string(reply, "message-name"), "process-finished-launching"));
// The process has finished launching, grab the pid from the connection.
pid_t processIdentifier = xpc_connection_get_pid(connection.get());
// We've finished launching the process, message back to the main run loop. This takes ownership of the connection.
RunLoop::main().dispatch(bind(didFinishLaunchingProcessFunction, that, processIdentifier, IPC::Connection::Identifier(listeningPort, connection)));
}
that->deref();
});
}
static void connectToReExecService(const ProcessLauncher::LaunchOptions& launchOptions, ProcessLauncher* that, DidFinishLaunchingProcessFunction didFinishLaunchingProcessFunction)
{
EnvironmentVariables environmentVariables;
addDYLDEnvironmentAdditions(launchOptions, true, environmentVariables);
#if ENABLE(NETSCAPE_PLUGIN_API)
if (launchOptions.processType == ProcessLauncher::PluginProcess) {
// Tagged pointers break video in Flash, see bug 135354.
environmentVariables.set("NSStringDisableTagged", "YES");
}
#endif
// Generate the uuid for the service instance we are about to create.
// FIXME: This UUID should be stored on the ChildProcessProxy.
RefPtr<UUIDHolder> instanceUUID = UUIDHolder::create();
// FIXME: It would be nice if we could use XPCPtr for this connection as well, but we'd have to be careful
// not to introduce any retain cycles in the call to xpc_connection_set_event_handler below.
xpc_connection_t reExecConnection = xpc_connection_create(serviceName(launchOptions, true), 0);
xpc_connection_set_instance(reExecConnection, instanceUUID->uuid);
// Keep the ProcessLauncher alive while we do the re-execing (balanced in event handler).
that->ref();
// We wait for the connection to tear itself down (indicated via an error event)
// to indicate that the service instance re-execed itself, and is now ready to be
// connected to.
xpc_connection_set_event_handler(reExecConnection, ^(xpc_object_t event) {
ASSERT(xpc_get_type(event) == XPC_TYPE_ERROR);
connectToService(launchOptions, true, that, didFinishLaunchingProcessFunction, instanceUUID.get());
// Release the connection.
xpc_release(reExecConnection);
// Other end of ref called before we setup the event handler.
that->deref();
});
xpc_connection_resume(reExecConnection);
xpc_object_t reExecMessage = xpc_dictionary_create(0, 0, 0);
xpc_dictionary_set_string(reExecMessage, "message-name", "re-exec");
cpu_type_t architecture = launchOptions.architecture == ProcessLauncher::LaunchOptions::MatchCurrentArchitecture ? _NSGetMachExecuteHeader()->cputype : launchOptions.architecture;
xpc_dictionary_set_uint64(reExecMessage, "architecture", (uint64_t)architecture);
xpc_object_t environment = xpc_array_create(0, 0);
char** environmentPointer = environmentVariables.environmentPointer();
Vector<CString> temps;
for (size_t i = 0; environmentPointer[i]; ++i) {
CString temp(environmentPointer[i], strlen(environmentPointer[i]));
temps.append(temp);
xpc_array_set_string(environment, XPC_ARRAY_APPEND, temp.data());
}
xpc_dictionary_set_value(reExecMessage, "environment", environment);
xpc_release(environment);
xpc_dictionary_set_bool(reExecMessage, "executable-heap", launchOptions.executableHeap);
xpc_connection_send_message(reExecConnection, reExecMessage);
xpc_release(reExecMessage);
}
static void createService(const ProcessLauncher::LaunchOptions& launchOptions, bool forDevelopment, ProcessLauncher* that, DidFinishLaunchingProcessFunction didFinishLaunchingProcessFunction)
{
if (forDevelopment) {
connectToReExecService(launchOptions, that, didFinishLaunchingProcessFunction);
return;
}
// Generate the uuid for the service instance we are about to create.
// FIXME: This UUID should be stored on the ChildProcessProxy.
RefPtr<UUIDHolder> instanceUUID = UUIDHolder::create();
connectToService(launchOptions, false, that, didFinishLaunchingProcessFunction, instanceUUID.get());
}
static bool tryPreexistingProcess(const ProcessLauncher::LaunchOptions& launchOptions, ProcessLauncher* that, DidFinishLaunchingProcessFunction didFinishLaunchingProcessFunction)
{
EnvironmentVariables environmentVariables;
static const char* preexistingProcessServiceName = environmentVariables.get(EnvironmentVariables::preexistingProcessServiceNameKey());
ProcessLauncher::ProcessType preexistingProcessType;
if (preexistingProcessServiceName)
ProcessLauncher::getProcessTypeFromString(environmentVariables.get(EnvironmentVariables::preexistingProcessTypeKey()), preexistingProcessType);
bool usePreexistingProcess = preexistingProcessServiceName && preexistingProcessType == launchOptions.processType;
if (!usePreexistingProcess)
return false;
// Create the listening port.
mach_port_t listeningPort;
mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &listeningPort);
// Insert a send right so we can send to it.
mach_port_insert_right(mach_task_self(), listeningPort, listeningPort, MACH_MSG_TYPE_MAKE_SEND);
pid_t processIdentifier = 0;
mach_port_t lookupPort;
bootstrap_look_up(bootstrap_port, preexistingProcessServiceName, &lookupPort);
mach_msg_header_t header;
header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, MACH_MSG_TYPE_MAKE_SEND);
header.msgh_id = 0;
header.msgh_local_port = listeningPort;
header.msgh_remote_port = lookupPort;
header.msgh_size = sizeof(header);
kern_return_t kr = mach_msg(&header, MACH_SEND_MSG, sizeof(header), 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
mach_port_deallocate(mach_task_self(), lookupPort);
preexistingProcessServiceName = 0;
if (kr) {
LOG_ERROR("Failed to pick up preexisting process at %s (%x). Launching a new process of type %s instead.", preexistingProcessServiceName, kr, ProcessLauncher::processTypeAsString(launchOptions.processType));
return false;
}
// We've finished launching the process, message back to the main run loop.
RunLoop::main().dispatch(bind(didFinishLaunchingProcessFunction, that, processIdentifier, IPC::Connection::Identifier(listeningPort)));
return true;
}
static void createProcess(const ProcessLauncher::LaunchOptions& launchOptions, bool isWebKitDevelopmentBuild, ProcessLauncher* that, DidFinishLaunchingProcessFunction didFinishLaunchingProcessFunction)
{
EnvironmentVariables environmentVariables;
addDYLDEnvironmentAdditions(launchOptions, isWebKitDevelopmentBuild, environmentVariables);
// Create the listening port.
mach_port_t listeningPort;
mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &listeningPort);
// Insert a send right so we can send to it.
mach_port_insert_right(mach_task_self(), listeningPort, listeningPort, MACH_MSG_TYPE_MAKE_SEND);
NSBundle *webKitBundle = [NSBundle bundleWithIdentifier:@"com.apple.WebKit"];
NSString *processPath = nil;
switch (launchOptions.processType) {
case ProcessLauncher::WebProcess:
processPath = [webKitBundle pathForAuxiliaryExecutable:@"WebProcess.app"];
break;
#if ENABLE(NETSCAPE_PLUGIN_API)
case ProcessLauncher::PluginProcess:
processPath = [webKitBundle pathForAuxiliaryExecutable:@"PluginProcess.app"];
break;
#endif
#if ENABLE(NETWORK_PROCESS)
case ProcessLauncher::NetworkProcess:
processPath = [webKitBundle pathForAuxiliaryExecutable:@"NetworkProcess.app"];
break;
#endif
#if ENABLE(DATABASE_PROCESS)
case ProcessLauncher::DatabaseProcess:
processPath = [webKitBundle pathForAuxiliaryExecutable:@"DatabaseProcess.app"];
break;
#endif
}
NSString *frameworkExecutablePath = [webKitBundle executablePath];
NSString *processAppExecutablePath = [[NSBundle bundleWithPath:processPath] executablePath];
NSString *bundleIdentifier = [[NSBundle mainBundle] bundleIdentifier];
CString clientIdentifier = bundleIdentifier ? String([[NSBundle mainBundle] bundleIdentifier]).utf8() : *_NSGetProgname();
// Make a unique, per pid, per process launcher web process service name.
CString serviceName = String::format("com.apple.WebKit.WebProcess-%d-%p", getpid(), that).utf8();
// Inherit UI process localization. It can be different from child process default localization:
// 1. When the application and system frameworks simply have different localized resources available, we should match the application.
// 1.1. An important case is WebKitTestRunner, where we should use English localizations for all system frameworks.
// 2. When AppleLanguages is passed as command line argument for UI process, or set in its preferences, we should respect it in child processes.
CString appleLanguagesArgument = String("('" + String(adoptCF(WKCopyCFLocalizationPreferredName(0)).get()) + "')").utf8();
Vector<const char*> args;
args.append([processAppExecutablePath fileSystemRepresentation]);
args.append([frameworkExecutablePath fileSystemRepresentation]);
args.append("-type");
args.append(ProcessLauncher::processTypeAsString(launchOptions.processType));
args.append("-servicename");
args.append(serviceName.data());
args.append("-client-identifier");
args.append(clientIdentifier.data());
args.append("-ui-process-name");
args.append([[[NSProcessInfo processInfo] processName] UTF8String]);
args.append("-AppleLanguages"); // This argument will be handled by Core Foundation.
args.append(appleLanguagesArgument.data());
HashMap<String, String>::const_iterator it = launchOptions.extraInitializationData.begin();
HashMap<String, String>::const_iterator end = launchOptions.extraInitializationData.end();
Vector<CString> temps;
for (; it != end; ++it) {
String keyPlusDash = "-" + it->key;
CString key(keyPlusDash.utf8().data());
temps.append(key);
args.append(key.data());
CString value(it->value.utf8().data());
temps.append(value);
args.append(value.data());
}
args.append(nullptr);
// Register ourselves.
kern_return_t kr = bootstrap_register2(bootstrap_port, const_cast<char*>(serviceName.data()), listeningPort, 0);
ASSERT_UNUSED(kr, kr == KERN_SUCCESS);
posix_spawnattr_t attr;
posix_spawnattr_init(&attr);
short flags = 0;
// We want our process to receive all signals.
sigset_t signalMaskSet;
sigemptyset(&signalMaskSet);
posix_spawnattr_setsigmask(&attr, &signalMaskSet);
flags |= POSIX_SPAWN_SETSIGMASK;
// Determine the architecture to use.
cpu_type_t architecture = launchOptions.architecture;
if (architecture == ProcessLauncher::LaunchOptions::MatchCurrentArchitecture)
architecture = _NSGetMachExecuteHeader()->cputype;
cpu_type_t cpuTypes[] = { architecture };
size_t outCount = 0;
posix_spawnattr_setbinpref_np(&attr, 1, cpuTypes, &outCount);
// Start suspended so we can set up the termination notification handler.
flags |= POSIX_SPAWN_START_SUSPENDED;
static const int allowExecutableHeapFlag = 0x2000;
if (launchOptions.executableHeap)
flags |= allowExecutableHeapFlag;
posix_spawnattr_setflags(&attr, flags);
pid_t processIdentifier = 0;
int result = posix_spawn(&processIdentifier, args[0], 0, &attr, const_cast<char**>(args.data()), environmentVariables.environmentPointer());
posix_spawnattr_destroy(&attr);
if (!result) {
// Set up the termination notification handler and then ask the child process to continue.
setUpTerminationNotificationHandler(processIdentifier);
kill(processIdentifier, SIGCONT);
} else {
// We failed to launch. Release the send right.
mach_port_deallocate(mach_task_self(), listeningPort);
// And the receive right.
mach_port_mod_refs(mach_task_self(), listeningPort, MACH_PORT_RIGHT_RECEIVE, -1);
listeningPort = MACH_PORT_NULL;
processIdentifier = 0;
}
// We've finished launching the process, message back to the main run loop.
RunLoop::main().dispatch(bind(didFinishLaunchingProcessFunction, that, processIdentifier, IPC::Connection::Identifier(listeningPort)));
}
static NSString *systemDirectoryPath()
{
static NSString *path = [^{
#if PLATFORM(IOS_SIMULATOR)
char *simulatorRoot = getenv("SIMULATOR_ROOT");
return simulatorRoot ? [NSString stringWithFormat:@"%s/System/", simulatorRoot] : @"/System/";
#else
return @"/System/";
#endif
}() copy];
return path;
}
void ProcessLauncher::launchProcess()
{
if (tryPreexistingProcess(m_launchOptions, this, &ProcessLauncher::didFinishLaunchingProcess))
return;
bool isWebKitDevelopmentBuild = ![[[[NSBundle bundleWithIdentifier:@"com.apple.WebKit"] bundlePath] stringByDeletingLastPathComponent] hasPrefix:systemDirectoryPath()];
if (m_launchOptions.useXPC) {
createService(m_launchOptions, isWebKitDevelopmentBuild, this, &ProcessLauncher::didFinishLaunchingProcess);
return;
}
createProcess(m_launchOptions, isWebKitDevelopmentBuild, this, &ProcessLauncher::didFinishLaunchingProcess);
}
void ProcessLauncher::terminateProcess()
{
if (m_isLaunching) {
invalidate();
return;
}
if (!m_processIdentifier)
return;
kill(m_processIdentifier, SIGKILL);
m_processIdentifier = 0;
}
void ProcessLauncher::platformInvalidate()
{
}
} // namespace WebKit