bool
GeckoChildProcessHost::PerformAsyncLaunchInternal(std::vector<std::string>& aExtraOpts, base::ProcessArchitecture arch)
{
// We rely on the fact that InitializeChannel() has already been processed
// on the IO thread before this point is reached.
if (!GetChannel()) {
return false;
}
base::ProcessHandle process = 0;
// send the child the PID so that it can open a ProcessHandle back to us.
// probably don't want to do this in the long run
char pidstring[32];
PR_snprintf(pidstring, sizeof(pidstring) - 1,
"%ld", base::Process::Current().pid());
const char* const childProcessType =
XRE_ChildProcessTypeToString(mProcessType);
//--------------------------------------------------
#if defined(OS_POSIX)
// For POSIX, we have to be extremely anal about *not* using
// std::wstring in code compiled with Mozilla's -fshort-wchar
// configuration, because chromium is compiled with -fno-short-wchar
// and passing wstrings from one config to the other is unsafe. So
// we split the logic here.
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD)
base::environment_map newEnvVars;
ChildPrivileges privs = mPrivileges;
if (privs == base::PRIVILEGES_DEFAULT) {
privs = DefaultChildPrivileges();
}
// XPCOM may not be initialized in some subprocesses. We don't want
// to initialize XPCOM just for the directory service, especially
// since LD_LIBRARY_PATH is already set correctly in subprocesses
// (meaning that we don't need to set that up in the environment).
if (ShouldHaveDirectoryService()) {
MOZ_ASSERT(gGREBinPath);
nsCString path;
NS_CopyUnicodeToNative(nsDependentString(gGREBinPath), path);
# if defined(OS_LINUX) || defined(OS_BSD)
# if defined(MOZ_WIDGET_ANDROID)
path += "/lib";
# endif // MOZ_WIDGET_ANDROID
const char *ld_library_path = PR_GetEnv("LD_LIBRARY_PATH");
nsCString new_ld_lib_path;
if (ld_library_path && *ld_library_path) {
new_ld_lib_path.Assign(path.get());
new_ld_lib_path.Append(':');
new_ld_lib_path.Append(ld_library_path);
newEnvVars["LD_LIBRARY_PATH"] = new_ld_lib_path.get();
} else {
newEnvVars["LD_LIBRARY_PATH"] = path.get();
}
# if (MOZ_WIDGET_GTK == 3)
if (mProcessType == GeckoProcessType_Plugin) {
const char *ld_preload = PR_GetEnv("LD_PRELOAD");
nsCString new_ld_preload;
new_ld_preload.Assign(path.get());
new_ld_preload.AppendLiteral("/" DLL_PREFIX "mozgtk2" DLL_SUFFIX);
if (ld_preload && *ld_preload) {
new_ld_preload.AppendLiteral(":");
new_ld_preload.Append(ld_preload);
}
newEnvVars["LD_PRELOAD"] = new_ld_preload.get();
}
# endif // MOZ_WIDGET_GTK
# elif OS_MACOSX
newEnvVars["DYLD_LIBRARY_PATH"] = path.get();
// XXX DYLD_INSERT_LIBRARIES should only be set when launching a plugin
// process, and has no effect on other subprocesses (the hooks in
// libplugin_child_interpose.dylib become noops). But currently it
// gets set when launching any kind of subprocess.
//
// Trigger "dyld interposing" for the dylib that contains
// plugin_child_interpose.mm. This allows us to hook OS calls in the
// plugin process (ones that don't work correctly in a background
// process). Don't break any other "dyld interposing" that has already
// been set up by whatever may have launched the browser.
const char* prevInterpose = PR_GetEnv("DYLD_INSERT_LIBRARIES");
nsCString interpose;
if (prevInterpose) {
interpose.Assign(prevInterpose);
interpose.Append(':');
}
interpose.Append(path.get());
interpose.AppendLiteral("/libplugin_child_interpose.dylib");
newEnvVars["DYLD_INSERT_LIBRARIES"] = interpose.get();
# endif // OS_LINUX
}
#endif // OS_LINUX || OS_MACOSX
FilePath exePath;
GetPathToBinary(exePath);
#ifdef MOZ_WIDGET_ANDROID
// The java wrapper unpacks this for us but can't make it executable
chmod(exePath.value().c_str(), 0700);
#endif // MOZ_WIDGET_ANDROID
#ifdef ANDROID
// Remap the Android property workspace to a well-known int,
// and update the environment to reflect the new value for the
// child process.
const char *apws = getenv("ANDROID_PROPERTY_WORKSPACE");
if (apws) {
int fd = atoi(apws);
mFileMap.push_back(std::pair<int, int>(fd, kMagicAndroidSystemPropFd));
char buf[32];
char *szptr = strchr(apws, ',');
snprintf(buf, sizeof(buf), "%d%s", kMagicAndroidSystemPropFd, szptr);
newEnvVars["ANDROID_PROPERTY_WORKSPACE"] = buf;
}
#endif // ANDROID
#ifdef MOZ_WIDGET_GONK
if (const char *ldPreloadPath = getenv("LD_PRELOAD")) {
newEnvVars["LD_PRELOAD"] = ldPreloadPath;
}
#endif // MOZ_WIDGET_GONK
// remap the IPC socket fd to a well-known int, as the OS does for
// STDOUT_FILENO, for example
int srcChannelFd, dstChannelFd;
channel().GetClientFileDescriptorMapping(&srcChannelFd, &dstChannelFd);
mFileMap.push_back(std::pair<int,int>(srcChannelFd, dstChannelFd));
// no need for kProcessChannelID, the child process inherits the
// other end of the socketpair() from us
std::vector<std::string> childArgv;
childArgv.push_back(exePath.value());
childArgv.insert(childArgv.end(), aExtraOpts.begin(), aExtraOpts.end());
if (Omnijar::IsInitialized()) {
// Make sure that child processes can find the omnijar
// See XRE_InitCommandLine in nsAppRunner.cpp
nsAutoCString path;
nsCOMPtr<nsIFile> file = Omnijar::GetPath(Omnijar::GRE);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
childArgv.push_back("-greomni");
childArgv.push_back(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
childArgv.push_back("-appomni");
childArgv.push_back(path.get());
}
}
// Add the application directory path (-appdir path)
AddAppDirToCommandLine(childArgv);
childArgv.push_back(pidstring);
#if defined(MOZ_CRASHREPORTER)
# if defined(OS_LINUX) || defined(OS_BSD)
int childCrashFd, childCrashRemapFd;
if (!CrashReporter::CreateNotificationPipeForChild(
&childCrashFd, &childCrashRemapFd))
return false;
if (0 <= childCrashFd) {
mFileMap.push_back(std::pair<int,int>(childCrashFd, childCrashRemapFd));
// "true" == crash reporting enabled
childArgv.push_back("true");
}
else {
// "false" == crash reporting disabled
childArgv.push_back("false");
}
# elif defined(MOZ_WIDGET_COCOA)
childArgv.push_back(CrashReporter::GetChildNotificationPipe());
# endif // OS_LINUX
#endif
#ifdef MOZ_WIDGET_COCOA
// Add a mach port to the command line so the child can communicate its
// 'task_t' back to the parent.
//
// Put a random number into the channel name, so that a compromised renderer
// can't pretend being the child that's forked off.
std::string mach_connection_name = StringPrintf("org.mozilla.machname.%d",
base::RandInt(0, std::numeric_limits<int>::max()));
childArgv.push_back(mach_connection_name.c_str());
#endif
childArgv.push_back(childProcessType);
base::LaunchApp(childArgv, mFileMap,
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD)
newEnvVars, privs,
#endif
false, &process, arch);
// We're in the parent and the child was launched. Close the child FD in the
// parent as soon as possible, which will allow the parent to detect when the
// child closes its FD (either due to normal exit or due to crash).
GetChannel()->CloseClientFileDescriptor();
#ifdef MOZ_WIDGET_COCOA
// Wait for the child process to send us its 'task_t' data.
const int kTimeoutMs = 10000;
MachReceiveMessage child_message;
ReceivePort parent_recv_port(mach_connection_name.c_str());
kern_return_t err = parent_recv_port.WaitForMessage(&child_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
std::string errString = StringPrintf("0x%x %s", err, mach_error_string(err));
CHROMIUM_LOG(ERROR) << "parent WaitForMessage() failed: " << errString;
return false;
}
task_t child_task = child_message.GetTranslatedPort(0);
if (child_task == MACH_PORT_NULL) {
CHROMIUM_LOG(ERROR) << "parent GetTranslatedPort(0) failed.";
return false;
}
if (child_message.GetTranslatedPort(1) == MACH_PORT_NULL) {
CHROMIUM_LOG(ERROR) << "parent GetTranslatedPort(1) failed.";
return false;
}
MachPortSender parent_sender(child_message.GetTranslatedPort(1));
MachSendMessage parent_message(/* id= */0);
if (!parent_message.AddDescriptor(MachMsgPortDescriptor(bootstrap_port))) {
CHROMIUM_LOG(ERROR) << "parent AddDescriptor(" << bootstrap_port << ") failed.";
return false;
}
err = parent_sender.SendMessage(parent_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
std::string errString = StringPrintf("0x%x %s", err, mach_error_string(err));
CHROMIUM_LOG(ERROR) << "parent SendMessage() failed: " << errString;
return false;
}
#endif
//--------------------------------------------------
#elif defined(OS_WIN)
FilePath exePath;
GetPathToBinary(exePath);
CommandLine cmdLine(exePath.ToWStringHack());
cmdLine.AppendSwitchWithValue(switches::kProcessChannelID, channel_id());
for (std::vector<std::string>::iterator it = aExtraOpts.begin();
it != aExtraOpts.end();
++it) {
cmdLine.AppendLooseValue(UTF8ToWide(*it));
}
if (Omnijar::IsInitialized()) {
// Make sure the child process can find the omnijar
// See XRE_InitCommandLine in nsAppRunner.cpp
nsAutoString path;
nsCOMPtr<nsIFile> file = Omnijar::GetPath(Omnijar::GRE);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
cmdLine.AppendLooseValue(UTF8ToWide("-greomni"));
cmdLine.AppendLooseValue(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
cmdLine.AppendLooseValue(UTF8ToWide("-appomni"));
cmdLine.AppendLooseValue(path.get());
}
}
#if defined(XP_WIN)
bool shouldSandboxCurrentProcess = false;
switch (mProcessType) {
case GeckoProcessType_Content:
#if defined(MOZ_CONTENT_SANDBOX)
if (!PR_GetEnv("MOZ_DISABLE_CONTENT_SANDBOX")) {
mSandboxBroker.SetSecurityLevelForContentProcess();
cmdLine.AppendLooseValue(UTF8ToWide("-sandbox"));
shouldSandboxCurrentProcess = true;
}
#endif // MOZ_CONTENT_SANDBOX
break;
case GeckoProcessType_Plugin:
// XXX: We don't sandbox this process type yet
// mSandboxBroker.SetSecurityLevelForPluginProcess();
// cmdLine.AppendLooseValue(UTF8ToWide("-sandbox"));
// shouldSandboxCurrentProcess = true;
break;
case GeckoProcessType_IPDLUnitTest:
// XXX: We don't sandbox this process type yet
// mSandboxBroker.SetSecurityLevelForIPDLUnitTestProcess();
// cmdLine.AppendLooseValue(UTF8ToWide("-sandbox"));
// shouldSandboxCurrentProcess = true;
break;
case GeckoProcessType_GMPlugin:
#ifdef MOZ_SANDBOX
if (!PR_GetEnv("MOZ_DISABLE_GMP_SANDBOX")) {
mSandboxBroker.SetSecurityLevelForGMPlugin();
cmdLine.AppendLooseValue(UTF8ToWide("-sandbox"));
shouldSandboxCurrentProcess = true;
}
#endif
break;
case GeckoProcessType_Default:
default:
MOZ_CRASH("Bad process type in GeckoChildProcessHost");
break;
};
if (shouldSandboxCurrentProcess) {
for (auto it = mAllowedFilesRead.begin();
it != mAllowedFilesRead.end();
++it) {
mSandboxBroker.AllowReadFile(it->c_str());
}
}
#endif // XP_WIN
// Add the application directory path (-appdir path)
AddAppDirToCommandLine(cmdLine);
// XXX Command line params past this point are expected to be at
// the end of the command line string, and in a specific order.
// See XRE_InitChildProcess in nsEmbedFunction.
// Win app model id
cmdLine.AppendLooseValue(mGroupId.get());
// Process id
cmdLine.AppendLooseValue(UTF8ToWide(pidstring));
#if defined(MOZ_CRASHREPORTER)
cmdLine.AppendLooseValue(
UTF8ToWide(CrashReporter::GetChildNotificationPipe()));
#endif
// Process type
cmdLine.AppendLooseValue(UTF8ToWide(childProcessType));
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
if (shouldSandboxCurrentProcess) {
mSandboxBroker.LaunchApp(cmdLine.program().c_str(),
cmdLine.command_line_string().c_str(),
&process);
} else
#endif
{
base::LaunchApp(cmdLine, false, false, &process);
}
#else
# error Sorry
#endif
if (!process) {
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_ERROR;
lock.Notify();
return false;
}
// NB: on OS X, we block much longer than we need to in order to
// reach this call, waiting for the child process's task_t. The
// best way to fix that is to refactor this file, hard.
SetHandle(process);
#if defined(MOZ_WIDGET_COCOA)
mChildTask = child_task;
#endif
OpenPrivilegedHandle(base::GetProcId(process));
{
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_CREATED;
lock.Notify();
}
return true;
}
bool
GeckoChildProcessHost::PerformAsyncLaunchInternal(std::vector<std::string>& aExtraOpts, base::ProcessArchitecture arch)
{
// We rely on the fact that InitializeChannel() has already been processed
// on the IO thread before this point is reached.
if (!GetChannel()) {
return false;
}
base::ProcessHandle process;
// send the child the PID so that it can open a ProcessHandle back to us.
// probably don't want to do this in the long run
char pidstring[32];
PR_snprintf(pidstring, sizeof(pidstring) - 1,
"%ld", base::Process::Current().pid());
const char* const childProcessType =
XRE_ChildProcessTypeToString(mProcessType);
//--------------------------------------------------
#if defined(OS_POSIX)
// For POSIX, we have to be extremely anal about *not* using
// std::wstring in code compiled with Mozilla's -fshort-wchar
// configuration, because chromium is compiled with -fno-short-wchar
// and passing wstrings from one config to the other is unsafe. So
// we split the logic here.
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD)
base::environment_map newEnvVars;
ChildPrivileges privs = mPrivileges;
if (privs == base::PRIVILEGES_DEFAULT) {
privs = kLowRightsSubprocesses ?
base::PRIVILEGES_UNPRIVILEGED : base::PRIVILEGES_INHERIT;
}
// XPCOM may not be initialized in some subprocesses. We don't want
// to initialize XPCOM just for the directory service, especially
// since LD_LIBRARY_PATH is already set correctly in subprocesses
// (meaning that we don't need to set that up in the environment).
if (ShouldHaveDirectoryService()) {
nsCOMPtr<nsIProperties> directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
NS_ASSERTION(directoryService, "Expected XPCOM to be available");
if (directoryService) {
nsCOMPtr<nsIFile> greDir;
nsresult rv = directoryService->Get(NS_GRE_DIR, NS_GET_IID(nsIFile), getter_AddRefs(greDir));
if (NS_SUCCEEDED(rv)) {
nsCString path;
greDir->GetNativePath(path);
# if defined(OS_LINUX) || defined(OS_BSD)
# if defined(MOZ_WIDGET_ANDROID) || defined(OS_BSD)
path += "/lib";
# endif // MOZ_WIDGET_ANDROID
const char *ld_library_path = PR_GetEnv("LD_LIBRARY_PATH");
nsCString new_ld_lib_path;
if (ld_library_path && *ld_library_path) {
new_ld_lib_path.Assign(path.get());
new_ld_lib_path.AppendLiteral(":");
new_ld_lib_path.Append(ld_library_path);
newEnvVars["LD_LIBRARY_PATH"] = new_ld_lib_path.get();
} else {
newEnvVars["LD_LIBRARY_PATH"] = path.get();
}
# elif OS_MACOSX
newEnvVars["DYLD_LIBRARY_PATH"] = path.get();
// XXX DYLD_INSERT_LIBRARIES should only be set when launching a plugin
// process, and has no effect on other subprocesses (the hooks in
// libplugin_child_interpose.dylib become noops). But currently it
// gets set when launching any kind of subprocess.
//
// Trigger "dyld interposing" for the dylib that contains
// plugin_child_interpose.mm. This allows us to hook OS calls in the
// plugin process (ones that don't work correctly in a background
// process). Don't break any other "dyld interposing" that has already
// been set up by whatever may have launched the browser.
const char* prevInterpose = PR_GetEnv("DYLD_INSERT_LIBRARIES");
nsCString interpose;
if (prevInterpose) {
interpose.Assign(prevInterpose);
interpose.AppendLiteral(":");
}
interpose.Append(path.get());
interpose.AppendLiteral("/libplugin_child_interpose.dylib");
newEnvVars["DYLD_INSERT_LIBRARIES"] = interpose.get();
# endif // OS_LINUX
}
}
}
#endif // OS_LINUX || OS_MACOSX
FilePath exePath;
GetPathToBinary(exePath);
#ifdef MOZ_WIDGET_ANDROID
// The java wrapper unpacks this for us but can't make it executable
chmod(exePath.value().c_str(), 0700);
int cacheCount = 0;
const struct lib_cache_info * cache = getLibraryCache();
nsCString cacheStr;
while (cache &&
cacheCount++ < MAX_LIB_CACHE_ENTRIES &&
strlen(cache->name)) {
mFileMap.push_back(std::pair<int,int>(cache->fd, cache->fd));
cacheStr.Append(cache->name);
cacheStr.AppendPrintf(":%d;", cache->fd);
cache++;
}
// fill the last arg with something if there's no cache
if (cacheStr.IsEmpty())
cacheStr.AppendLiteral("-");
#endif // MOZ_WIDGET_ANDROID
#ifdef ANDROID
// Remap the Android property workspace to a well-known int,
// and update the environment to reflect the new value for the
// child process.
const char *apws = getenv("ANDROID_PROPERTY_WORKSPACE");
if (apws) {
int fd = atoi(apws);
mFileMap.push_back(std::pair<int, int>(fd, kMagicAndroidSystemPropFd));
char buf[32];
char *szptr = strchr(apws, ',');
snprintf(buf, sizeof(buf), "%d%s", kMagicAndroidSystemPropFd, szptr);
newEnvVars["ANDROID_PROPERTY_WORKSPACE"] = buf;
}
#endif // ANDROID
#ifdef MOZ_WIDGET_GONK
if (const char *ldPreloadPath = getenv("LD_PRELOAD")) {
newEnvVars["LD_PRELOAD"] = ldPreloadPath;
}
#endif // MOZ_WIDGET_GONK
// remap the IPC socket fd to a well-known int, as the OS does for
// STDOUT_FILENO, for example
int srcChannelFd, dstChannelFd;
channel().GetClientFileDescriptorMapping(&srcChannelFd, &dstChannelFd);
mFileMap.push_back(std::pair<int,int>(srcChannelFd, dstChannelFd));
// no need for kProcessChannelID, the child process inherits the
// other end of the socketpair() from us
std::vector<std::string> childArgv;
childArgv.push_back(exePath.value());
childArgv.insert(childArgv.end(), aExtraOpts.begin(), aExtraOpts.end());
if (Omnijar::IsInitialized()) {
// Make sure that child processes can find the omnijar
// See XRE_InitCommandLine in nsAppRunner.cpp
nsAutoCString path;
nsCOMPtr<nsIFile> file = Omnijar::GetPath(Omnijar::GRE);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
childArgv.push_back("-greomni");
childArgv.push_back(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
childArgv.push_back("-appomni");
childArgv.push_back(path.get());
}
}
childArgv.push_back(pidstring);
#if defined(MOZ_CRASHREPORTER)
# if defined(OS_LINUX) || defined(OS_BSD)
int childCrashFd, childCrashRemapFd;
if (!CrashReporter::CreateNotificationPipeForChild(
&childCrashFd, &childCrashRemapFd))
return false;
if (0 <= childCrashFd) {
mFileMap.push_back(std::pair<int,int>(childCrashFd, childCrashRemapFd));
// "true" == crash reporting enabled
childArgv.push_back("true");
}
else {
// "false" == crash reporting disabled
childArgv.push_back("false");
}
# elif defined(MOZ_WIDGET_COCOA)
childArgv.push_back(CrashReporter::GetChildNotificationPipe());
# endif // OS_LINUX
#endif
#ifdef MOZ_WIDGET_COCOA
// Add a mach port to the command line so the child can communicate its
// 'task_t' back to the parent.
//
// Put a random number into the channel name, so that a compromised renderer
// can't pretend being the child that's forked off.
std::string mach_connection_name = StringPrintf("org.mozilla.machname.%d",
base::RandInt(0, std::numeric_limits<int>::max()));
childArgv.push_back(mach_connection_name.c_str());
#endif
childArgv.push_back(childProcessType);
#ifdef MOZ_WIDGET_ANDROID
childArgv.push_back(cacheStr.get());
#endif
base::LaunchApp(childArgv, mFileMap,
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD)
newEnvVars, privs,
#endif
false, &process, arch);
#ifdef MOZ_WIDGET_COCOA
// Wait for the child process to send us its 'task_t' data.
const int kTimeoutMs = 10000;
MachReceiveMessage child_message;
ReceivePort parent_recv_port(mach_connection_name.c_str());
kern_return_t err = parent_recv_port.WaitForMessage(&child_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
std::string errString = StringPrintf("0x%x %s", err, mach_error_string(err));
LOG(ERROR) << "parent WaitForMessage() failed: " << errString;
return false;
}
task_t child_task = child_message.GetTranslatedPort(0);
if (child_task == MACH_PORT_NULL) {
LOG(ERROR) << "parent GetTranslatedPort(0) failed.";
return false;
}
if (child_message.GetTranslatedPort(1) == MACH_PORT_NULL) {
LOG(ERROR) << "parent GetTranslatedPort(1) failed.";
return false;
}
MachPortSender parent_sender(child_message.GetTranslatedPort(1));
MachSendMessage parent_message(/* id= */0);
if (!parent_message.AddDescriptor(bootstrap_port)) {
LOG(ERROR) << "parent AddDescriptor(" << bootstrap_port << ") failed.";
return false;
}
err = parent_sender.SendMessage(parent_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
std::string errString = StringPrintf("0x%x %s", err, mach_error_string(err));
LOG(ERROR) << "parent SendMessage() failed: " << errString;
return false;
}
#endif
//--------------------------------------------------
#elif defined(OS_WIN)
FilePath exePath;
GetPathToBinary(exePath);
CommandLine cmdLine(exePath.ToWStringHack());
cmdLine.AppendSwitchWithValue(switches::kProcessChannelID, channel_id());
for (std::vector<std::string>::iterator it = aExtraOpts.begin();
it != aExtraOpts.end();
++it) {
cmdLine.AppendLooseValue(UTF8ToWide(*it));
}
cmdLine.AppendLooseValue(std::wstring(mGroupId.get()));
if (Omnijar::IsInitialized()) {
// Make sure the child process can find the omnijar
// See XRE_InitCommandLine in nsAppRunner.cpp
nsAutoString path;
nsCOMPtr<nsIFile> file = Omnijar::GetPath(Omnijar::GRE);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
cmdLine.AppendLooseValue(UTF8ToWide("-greomni"));
cmdLine.AppendLooseValue(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
cmdLine.AppendLooseValue(UTF8ToWide("-appomni"));
cmdLine.AppendLooseValue(path.get());
}
}
cmdLine.AppendLooseValue(UTF8ToWide(pidstring));
#if defined(MOZ_CRASHREPORTER)
cmdLine.AppendLooseValue(
UTF8ToWide(CrashReporter::GetChildNotificationPipe()));
#endif
cmdLine.AppendLooseValue(UTF8ToWide(childProcessType));
base::LaunchApp(cmdLine, false, false, &process);
#else
# error Sorry
#endif
if (!process) {
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_ERROR;
lock.Notify();
return false;
}
// NB: on OS X, we block much longer than we need to in order to
// reach this call, waiting for the child process's task_t. The
// best way to fix that is to refactor this file, hard.
SetHandle(process);
#if defined(MOZ_WIDGET_COCOA)
mChildTask = child_task;
#endif
OpenPrivilegedHandle(base::GetProcId(process));
{
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_CREATED;
lock.Notify();
}
return true;
}
bool
GeckoChildProcessHost::PerformAsyncLaunchInternal(std::vector<std::string>& aExtraOpts, base::ProcessArchitecture arch)
{
// We rely on the fact that InitializeChannel() has already been processed
// on the IO thread before this point is reached.
if (!GetChannel()) {
return false;
}
base::ProcessHandle process = 0;
// send the child the PID so that it can open a ProcessHandle back to us.
// probably don't want to do this in the long run
char pidstring[32];
SprintfLiteral(pidstring,"%d", base::Process::Current().pid());
const char* const childProcessType =
XRE_ChildProcessTypeToString(mProcessType);
//--------------------------------------------------
#if defined(OS_POSIX)
// For POSIX, we have to be extremely anal about *not* using
// std::wstring in code compiled with Mozilla's -fshort-wchar
// configuration, because chromium is compiled with -fno-short-wchar
// and passing wstrings from one config to the other is unsafe. So
// we split the logic here.
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD) || defined(OS_SOLARIS)
base::environment_map newEnvVars;
ChildPrivileges privs = mPrivileges;
if (privs == base::PRIVILEGES_DEFAULT ||
privs == base::PRIVILEGES_FILEREAD) {
privs = DefaultChildPrivileges();
}
#if defined(MOZ_WIDGET_GTK)
if (mProcessType == GeckoProcessType_Content) {
// disable IM module to avoid sandbox violation
newEnvVars["GTK_IM_MODULE"] = "gtk-im-context-simple";
// Disable ATK accessibility code in content processes because it conflicts
// with the sandbox, and we proxy that information through the main process
// anyway.
newEnvVars["NO_AT_BRIDGE"] = "1";
}
#endif
// XPCOM may not be initialized in some subprocesses. We don't want
// to initialize XPCOM just for the directory service, especially
// since LD_LIBRARY_PATH is already set correctly in subprocesses
// (meaning that we don't need to set that up in the environment).
if (ShouldHaveDirectoryService()) {
MOZ_ASSERT(gGREBinPath);
nsCString path;
NS_CopyUnicodeToNative(nsDependentString(gGREBinPath), path);
# if defined(OS_LINUX) || defined(OS_BSD)
const char *ld_library_path = PR_GetEnv("LD_LIBRARY_PATH");
nsCString new_ld_lib_path(path.get());
# if (MOZ_WIDGET_GTK == 3)
if (mProcessType == GeckoProcessType_Plugin) {
new_ld_lib_path.Append("/gtk2:");
new_ld_lib_path.Append(path.get());
}
#endif
if (ld_library_path && *ld_library_path) {
new_ld_lib_path.Append(':');
new_ld_lib_path.Append(ld_library_path);
}
newEnvVars["LD_LIBRARY_PATH"] = new_ld_lib_path.get();
# elif OS_MACOSX
newEnvVars["DYLD_LIBRARY_PATH"] = path.get();
// XXX DYLD_INSERT_LIBRARIES should only be set when launching a plugin
// process, and has no effect on other subprocesses (the hooks in
// libplugin_child_interpose.dylib become noops). But currently it
// gets set when launching any kind of subprocess.
//
// Trigger "dyld interposing" for the dylib that contains
// plugin_child_interpose.mm. This allows us to hook OS calls in the
// plugin process (ones that don't work correctly in a background
// process). Don't break any other "dyld interposing" that has already
// been set up by whatever may have launched the browser.
const char* prevInterpose = PR_GetEnv("DYLD_INSERT_LIBRARIES");
nsCString interpose;
if (prevInterpose && strlen(prevInterpose) > 0) {
interpose.Assign(prevInterpose);
interpose.Append(':');
}
interpose.Append(path.get());
interpose.AppendLiteral("/libplugin_child_interpose.dylib");
newEnvVars["DYLD_INSERT_LIBRARIES"] = interpose.get();
# endif // OS_LINUX
}
#endif // OS_LINUX || OS_MACOSX
FilePath exePath;
BinaryPathType pathType = GetPathToBinary(exePath, mProcessType);
#ifdef MOZ_WIDGET_GONK
if (const char *ldPreloadPath = getenv("LD_PRELOAD")) {
newEnvVars["LD_PRELOAD"] = ldPreloadPath;
}
#endif // MOZ_WIDGET_GONK
#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
// Preload libmozsandbox.so so that sandbox-related interpositions
// can be defined there instead of in the executable.
// (This could be made conditional on intent to use sandboxing, but
// it's harmless for non-sandboxed processes.)
{
nsAutoCString preload;
// Prepend this, because people can and do preload libpthread.
// (See bug 1222500.)
preload.AssignLiteral("libmozsandbox.so");
if (const char* oldPreload = PR_GetEnv("LD_PRELOAD")) {
// Doesn't matter if oldPreload is ""; extra separators are ignored.
preload.Append(' ');
preload.Append(oldPreload);
}
// Explicitly construct the std::string to make it clear that this
// isn't retaining a pointer to the nsCString's buffer.
newEnvVars["LD_PRELOAD"] = std::string(preload.get());
}
#endif
// remap the IPC socket fd to a well-known int, as the OS does for
// STDOUT_FILENO, for example
int srcChannelFd, dstChannelFd;
channel().GetClientFileDescriptorMapping(&srcChannelFd, &dstChannelFd);
mFileMap.push_back(std::pair<int,int>(srcChannelFd, dstChannelFd));
// no need for kProcessChannelID, the child process inherits the
// other end of the socketpair() from us
std::vector<std::string> childArgv;
childArgv.push_back(exePath.value());
if (pathType == BinaryPathType::Self) {
childArgv.push_back("-contentproc");
}
childArgv.insert(childArgv.end(), aExtraOpts.begin(), aExtraOpts.end());
if (Omnijar::IsInitialized()) {
// Make sure that child processes can find the omnijar
// See XRE_InitCommandLine in nsAppRunner.cpp
nsAutoCString path;
nsCOMPtr<nsIFile> file = Omnijar::GetPath(Omnijar::GRE);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
childArgv.push_back("-greomni");
childArgv.push_back(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
childArgv.push_back("-appomni");
childArgv.push_back(path.get());
}
}
// Add the application directory path (-appdir path)
AddAppDirToCommandLine(childArgv);
childArgv.push_back(pidstring);
#if defined(MOZ_CRASHREPORTER)
# if defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS)
int childCrashFd, childCrashRemapFd;
if (!CrashReporter::CreateNotificationPipeForChild(
&childCrashFd, &childCrashRemapFd))
return false;
if (0 <= childCrashFd) {
mFileMap.push_back(std::pair<int,int>(childCrashFd, childCrashRemapFd));
// "true" == crash reporting enabled
childArgv.push_back("true");
}
else {
// "false" == crash reporting disabled
childArgv.push_back("false");
}
# elif defined(MOZ_WIDGET_COCOA)
childArgv.push_back(CrashReporter::GetChildNotificationPipe());
# endif // OS_LINUX || OS_BSD || OS_SOLARIS
#endif
#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
{
int srcFd, dstFd;
SandboxReporter::Singleton()
->GetClientFileDescriptorMapping(&srcFd, &dstFd);
mFileMap.push_back(std::make_pair(srcFd, dstFd));
}
#endif
#ifdef MOZ_WIDGET_COCOA
// Add a mach port to the command line so the child can communicate its
// 'task_t' back to the parent.
//
// Put a random number into the channel name, so that a compromised renderer
// can't pretend being the child that's forked off.
std::string mach_connection_name = StringPrintf("org.mozilla.machname.%d",
base::RandInt(0, std::numeric_limits<int>::max()));
childArgv.push_back(mach_connection_name.c_str());
#endif
childArgv.push_back(childProcessType);
#if defined(MOZ_WIDGET_ANDROID)
LaunchAndroidService(childProcessType, childArgv, mFileMap, &process);
#else
base::LaunchApp(childArgv, mFileMap,
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD) || defined(OS_SOLARIS)
newEnvVars, privs,
#endif
false, &process, arch);
#endif // defined(MOZ_WIDGET_ANDROID)
// We're in the parent and the child was launched. Close the child FD in the
// parent as soon as possible, which will allow the parent to detect when the
// child closes its FD (either due to normal exit or due to crash).
GetChannel()->CloseClientFileDescriptor();
#ifdef MOZ_WIDGET_COCOA
// Wait for the child process to send us its 'task_t' data.
const int kTimeoutMs = 10000;
MachReceiveMessage child_message;
ReceivePort parent_recv_port(mach_connection_name.c_str());
kern_return_t err = parent_recv_port.WaitForMessage(&child_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
std::string errString = StringPrintf("0x%x %s", err, mach_error_string(err));
CHROMIUM_LOG(ERROR) << "parent WaitForMessage() failed: " << errString;
return false;
}
task_t child_task = child_message.GetTranslatedPort(0);
if (child_task == MACH_PORT_NULL) {
CHROMIUM_LOG(ERROR) << "parent GetTranslatedPort(0) failed.";
return false;
}
if (child_message.GetTranslatedPort(1) == MACH_PORT_NULL) {
CHROMIUM_LOG(ERROR) << "parent GetTranslatedPort(1) failed.";
return false;
}
MachPortSender parent_sender(child_message.GetTranslatedPort(1));
if (child_message.GetTranslatedPort(2) == MACH_PORT_NULL) {
CHROMIUM_LOG(ERROR) << "parent GetTranslatedPort(2) failed.";
}
auto* parent_recv_port_memory_ack = new MachPortSender(child_message.GetTranslatedPort(2));
if (child_message.GetTranslatedPort(3) == MACH_PORT_NULL) {
CHROMIUM_LOG(ERROR) << "parent GetTranslatedPort(3) failed.";
}
auto* parent_send_port_memory = new MachPortSender(child_message.GetTranslatedPort(3));
MachSendMessage parent_message(/* id= */0);
if (!parent_message.AddDescriptor(MachMsgPortDescriptor(bootstrap_port))) {
CHROMIUM_LOG(ERROR) << "parent AddDescriptor(" << bootstrap_port << ") failed.";
return false;
}
auto* parent_recv_port_memory = new ReceivePort();
if (!parent_message.AddDescriptor(MachMsgPortDescriptor(parent_recv_port_memory->GetPort()))) {
CHROMIUM_LOG(ERROR) << "parent AddDescriptor(" << parent_recv_port_memory->GetPort() << ") failed.";
return false;
}
auto* parent_send_port_memory_ack = new ReceivePort();
if (!parent_message.AddDescriptor(MachMsgPortDescriptor(parent_send_port_memory_ack->GetPort()))) {
CHROMIUM_LOG(ERROR) << "parent AddDescriptor(" << parent_send_port_memory_ack->GetPort() << ") failed.";
return false;
}
err = parent_sender.SendMessage(parent_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
std::string errString = StringPrintf("0x%x %s", err, mach_error_string(err));
CHROMIUM_LOG(ERROR) << "parent SendMessage() failed: " << errString;
return false;
}
SharedMemoryBasic::SetupMachMemory(process, parent_recv_port_memory, parent_recv_port_memory_ack,
parent_send_port_memory, parent_send_port_memory_ack, false);
#endif
//--------------------------------------------------
#elif defined(OS_WIN)
FilePath exePath;
BinaryPathType pathType = GetPathToBinary(exePath, mProcessType);
CommandLine cmdLine(exePath.ToWStringHack());
if (pathType == BinaryPathType::Self) {
cmdLine.AppendLooseValue(UTF8ToWide("-contentproc"));
}
cmdLine.AppendSwitchWithValue(switches::kProcessChannelID, channel_id());
for (std::vector<std::string>::iterator it = aExtraOpts.begin();
it != aExtraOpts.end();
++it) {
cmdLine.AppendLooseValue(UTF8ToWide(*it));
}
if (Omnijar::IsInitialized()) {
// Make sure the child process can find the omnijar
// See XRE_InitCommandLine in nsAppRunner.cpp
nsAutoString path;
nsCOMPtr<nsIFile> file = Omnijar::GetPath(Omnijar::GRE);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
cmdLine.AppendLooseValue(UTF8ToWide("-greomni"));
cmdLine.AppendLooseValue(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
cmdLine.AppendLooseValue(UTF8ToWide("-appomni"));
cmdLine.AppendLooseValue(path.get());
}
}
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
bool shouldSandboxCurrentProcess = false;
// XXX: Bug 1124167: We should get rid of the process specific logic for
// sandboxing in this class at some point. Unfortunately it will take a bit
// of reorganizing so I don't think this patch is the right time.
switch (mProcessType) {
case GeckoProcessType_Content:
#if defined(MOZ_CONTENT_SANDBOX)
if (mSandboxLevel > 0 &&
!PR_GetEnv("MOZ_DISABLE_CONTENT_SANDBOX")) {
// For now we treat every failure as fatal in SetSecurityLevelForContentProcess
// and just crash there right away. Should this change in the future then we
// should also handle the error here.
mSandboxBroker.SetSecurityLevelForContentProcess(mSandboxLevel,
mPrivileges);
shouldSandboxCurrentProcess = true;
}
#endif // MOZ_CONTENT_SANDBOX
break;
case GeckoProcessType_Plugin:
if (mSandboxLevel > 0 &&
!PR_GetEnv("MOZ_DISABLE_NPAPI_SANDBOX")) {
bool ok = mSandboxBroker.SetSecurityLevelForPluginProcess(mSandboxLevel);
if (!ok) {
return false;
}
shouldSandboxCurrentProcess = true;
}
break;
case GeckoProcessType_IPDLUnitTest:
// XXX: We don't sandbox this process type yet
break;
case GeckoProcessType_GMPlugin:
if (!PR_GetEnv("MOZ_DISABLE_GMP_SANDBOX")) {
// The Widevine CDM on Windows can only load at USER_RESTRICTED,
// not at USER_LOCKDOWN. So look in the command line arguments
// to see if we're loading the path to the Widevine CDM, and if
// so use sandbox level USER_RESTRICTED instead of USER_LOCKDOWN.
bool isWidevine = std::any_of(aExtraOpts.begin(), aExtraOpts.end(),
[](const std::string arg) { return arg.find("gmp-widevinecdm") != std::string::npos; });
auto level = isWidevine ? SandboxBroker::Restricted : SandboxBroker::LockDown;
bool ok = mSandboxBroker.SetSecurityLevelForGMPlugin(level);
if (!ok) {
return false;
}
shouldSandboxCurrentProcess = true;
}
break;
case GeckoProcessType_GPU:
if (mSandboxLevel > 0 && !PR_GetEnv("MOZ_DISABLE_GPU_SANDBOX")) {
// For now we treat every failure as fatal in SetSecurityLevelForGPUProcess
// and just crash there right away. Should this change in the future then we
// should also handle the error here.
mSandboxBroker.SetSecurityLevelForGPUProcess(mSandboxLevel);
shouldSandboxCurrentProcess = true;
}
break;
case GeckoProcessType_Default:
default:
MOZ_CRASH("Bad process type in GeckoChildProcessHost");
break;
};
if (shouldSandboxCurrentProcess) {
for (auto it = mAllowedFilesRead.begin();
it != mAllowedFilesRead.end();
++it) {
mSandboxBroker.AllowReadFile(it->c_str());
}
for (auto it = mAllowedFilesReadWrite.begin();
it != mAllowedFilesReadWrite.end();
++it) {
mSandboxBroker.AllowReadWriteFile(it->c_str());
}
for (auto it = mAllowedDirectories.begin();
it != mAllowedDirectories.end();
++it) {
mSandboxBroker.AllowDirectory(it->c_str());
}
}
#endif // XP_WIN && MOZ_SANDBOX
// Add the application directory path (-appdir path)
AddAppDirToCommandLine(cmdLine);
// XXX Command line params past this point are expected to be at
// the end of the command line string, and in a specific order.
// See XRE_InitChildProcess in nsEmbedFunction.
// Win app model id
cmdLine.AppendLooseValue(mGroupId.get());
// Process id
cmdLine.AppendLooseValue(UTF8ToWide(pidstring));
#if defined(MOZ_CRASHREPORTER)
cmdLine.AppendLooseValue(
UTF8ToWide(CrashReporter::GetChildNotificationPipe()));
#endif
// Process type
cmdLine.AppendLooseValue(UTF8ToWide(childProcessType));
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
if (shouldSandboxCurrentProcess) {
if (mSandboxBroker.LaunchApp(cmdLine.program().c_str(),
cmdLine.command_line_string().c_str(),
mEnableSandboxLogging,
&process)) {
EnvironmentLog("MOZ_PROCESS_LOG").print(
"==> process %d launched child process %d (%S)\n",
base::GetCurrentProcId(), base::GetProcId(process),
cmdLine.command_line_string().c_str());
}
} else
#endif
{
base::LaunchApp(cmdLine, false, false, &process);
#ifdef MOZ_SANDBOX
// We need to be able to duplicate handles to some types of non-sandboxed
// child processes.
if (mProcessType == GeckoProcessType_Content ||
mProcessType == GeckoProcessType_GPU ||
mProcessType == GeckoProcessType_GMPlugin) {
if (!mSandboxBroker.AddTargetPeer(process)) {
NS_WARNING("Failed to add content process as target peer.");
}
}
#endif
}
#else
# error Sorry
#endif
if (!process) {
return false;
}
// NB: on OS X, we block much longer than we need to in order to
// reach this call, waiting for the child process's task_t. The
// best way to fix that is to refactor this file, hard.
#if defined(MOZ_WIDGET_COCOA)
mChildTask = child_task;
#endif
if (!OpenPrivilegedHandle(base::GetProcId(process))
#ifdef XP_WIN
// If we failed in opening the process handle, try harder by duplicating
// one.
&& !::DuplicateHandle(::GetCurrentProcess(), process,
::GetCurrentProcess(), &mChildProcessHandle,
PROCESS_DUP_HANDLE | PROCESS_TERMINATE |
PROCESS_QUERY_INFORMATION | PROCESS_VM_READ |
SYNCHRONIZE,
FALSE, 0)
#endif
) {
MOZ_CRASH("cannot open handle to child process");
}
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_CREATED;
lock.Notify();
return true;
}
bool
GeckoChildProcessHost::PerformAsyncLaunch(std::vector<std::string> aExtraOpts)
{
// FIXME/cjones: make this work from non-IO threads, too
// We rely on the fact that InitializeChannel() has already been processed
// on the IO thread before this point is reached.
if (!GetChannel()) {
return false;
}
base::ProcessHandle process;
// send the child the PID so that it can open a ProcessHandle back to us.
// probably don't want to do this in the long run
char pidstring[32];
PR_snprintf(pidstring, sizeof(pidstring) - 1,
"%ld", base::Process::Current().pid());
const char* const childProcessType =
XRE_ChildProcessTypeToString(mProcessType);
//--------------------------------------------------
#if defined(OS_POSIX)
// For POSIX, we have to be extremely anal about *not* using
// std::wstring in code compiled with Mozilla's -fshort-wchar
// configuration, because chromium is compiled with -fno-short-wchar
// and passing wstrings from one config to the other is unsafe. So
// we split the logic here.
FilePath exePath;
#ifdef OS_LINUX
base::environment_map newEnvVars;
#endif
nsCOMPtr<nsIProperties> directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
nsCOMPtr<nsIFile> greDir;
nsresult rv = directoryService->Get(NS_GRE_DIR, NS_GET_IID(nsIFile), getter_AddRefs(greDir));
if (NS_SUCCEEDED(rv)) {
nsCString path;
greDir->GetNativePath(path);
exePath = FilePath(path.get());
#ifdef OS_LINUX
newEnvVars["LD_LIBRARY_PATH"] = path.get();
#endif
}
else {
exePath = FilePath(CommandLine::ForCurrentProcess()->argv()[0]);
exePath = exePath.DirName();
}
exePath = exePath.AppendASCII(MOZ_CHILD_PROCESS_NAME);
// remap the IPC socket fd to a well-known int, as the OS does for
// STDOUT_FILENO, for example
int srcChannelFd, dstChannelFd;
channel().GetClientFileDescriptorMapping(&srcChannelFd, &dstChannelFd);
mFileMap.push_back(std::pair<int,int>(srcChannelFd, dstChannelFd));
// no need for kProcessChannelID, the child process inherits the
// other end of the socketpair() from us
std::vector<std::string> childArgv;
childArgv.push_back(exePath.value());
childArgv.insert(childArgv.end(), aExtraOpts.begin(), aExtraOpts.end());
childArgv.push_back(pidstring);
childArgv.push_back(childProcessType);
#if defined(MOZ_CRASHREPORTER)
int childCrashFd, childCrashRemapFd;
if (!CrashReporter::CreateNotificationPipeForChild(
&childCrashFd, &childCrashRemapFd))
return false;
if (0 <= childCrashFd) {
mFileMap.push_back(std::pair<int,int>(childCrashFd, childCrashRemapFd));
// "true" == crash reporting enabled
childArgv.push_back("true");
}
else {
// "false" == crash reporting disabled
childArgv.push_back("false");
}
#endif
base::LaunchApp(childArgv, mFileMap,
#ifdef OS_LINUX
newEnvVars,
#endif
false, &process);
//--------------------------------------------------
#elif defined(OS_WIN)
FilePath exePath =
FilePath::FromWStringHack(CommandLine::ForCurrentProcess()->program());
exePath = exePath.DirName();
exePath = exePath.AppendASCII(MOZ_CHILD_PROCESS_NAME);
CommandLine cmdLine(exePath.ToWStringHack());
cmdLine.AppendSwitchWithValue(switches::kProcessChannelID, channel_id());
for (std::vector<std::string>::iterator it = aExtraOpts.begin();
it != aExtraOpts.end();
++it) {
cmdLine.AppendLooseValue(UTF8ToWide(*it));
}
cmdLine.AppendLooseValue(UTF8ToWide(pidstring));
cmdLine.AppendLooseValue(UTF8ToWide(childProcessType));
#if defined(MOZ_CRASHREPORTER)
cmdLine.AppendLooseValue(
UTF8ToWide(CrashReporter::GetChildNotificationPipe()));
#endif
base::LaunchApp(cmdLine, false, false, &process);
#else
# error Sorry
#endif
if (!process) {
return false;
}
SetHandle(process);
return true;
}