gecko/ipc/glue/GeckoChildProcessHost.cpp

352 lines
10 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla IPC.
*
* The Initial Developer of the Original Code is
* Ben Turner <bent.mozilla@gmail.com>.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "GeckoChildProcessHost.h"
#include "base/command_line.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/process_watcher.h"
#include "prprf.h"
#if defined(OS_LINUX)
# define XP_LINUX 1
#endif
#include "nsExceptionHandler.h"
#include "nsDirectoryServiceDefs.h"
#include "nsIFile.h"
#include "mozilla/ipc/BrowserProcessSubThread.h"
#ifdef XP_WIN
#include "nsIWinTaskbar.h"
#define NS_TASKBAR_CONTRACTID "@mozilla.org/windows-taskbar;1"
#endif
using mozilla::MonitorAutoEnter;
using mozilla::ipc::GeckoChildProcessHost;
template<>
struct RunnableMethodTraits<GeckoChildProcessHost>
{
static void RetainCallee(GeckoChildProcessHost* obj) { }
static void ReleaseCallee(GeckoChildProcessHost* obj) { }
};
GeckoChildProcessHost::GeckoChildProcessHost(GeckoProcessType aProcessType,
base::WaitableEventWatcher::Delegate* aDelegate)
: ChildProcessHost(RENDER_PROCESS), // FIXME/cjones: we should own this enum
mProcessType(aProcessType),
mMonitor("mozilla.ipc.GeckChildProcessHost.mMonitor"),
mLaunched(false),
mChannelInitialized(false),
mDelegate(aDelegate),
mChildProcessHandle(0)
{
MOZ_COUNT_CTOR(GeckoChildProcessHost);
MessageLoop* ioLoop = XRE_GetIOMessageLoop();
ioLoop->PostTask(FROM_HERE,
NewRunnableMethod(this,
&GeckoChildProcessHost::InitializeChannel));
}
GeckoChildProcessHost::~GeckoChildProcessHost()
{
AssertIOThread();
MOZ_COUNT_DTOR(GeckoChildProcessHost);
if (mChildProcessHandle > 0)
ProcessWatcher::EnsureProcessTerminated(mChildProcessHandle
#if defined(NS_BUILD_REFCNT_LOGGING)
, false // don't "force"
#endif
);
}
bool
GeckoChildProcessHost::SyncLaunch(std::vector<std::string> aExtraOpts)
{
MessageLoop* ioLoop = XRE_GetIOMessageLoop();
NS_ASSERTION(MessageLoop::current() != ioLoop, "sync launch from the IO thread NYI");
ioLoop->PostTask(FROM_HERE,
NewRunnableMethod(this,
&GeckoChildProcessHost::PerformAsyncLaunch,
aExtraOpts));
// NB: this uses a different mechanism than the chromium parent
// class.
MonitorAutoEnter mon(mMonitor);
while (!mLaunched) {
mon.Wait();
}
return true;
}
bool
GeckoChildProcessHost::AsyncLaunch(std::vector<std::string> aExtraOpts)
{
MessageLoop* ioLoop = XRE_GetIOMessageLoop();
ioLoop->PostTask(FROM_HERE,
NewRunnableMethod(this,
&GeckoChildProcessHost::PerformAsyncLaunch,
aExtraOpts));
// This may look like the sync launch wait, but we only delay as
// long as it takes to create the channel.
MonitorAutoEnter mon(mMonitor);
while (!mChannelInitialized) {
mon.Wait();
}
return true;
}
void
GeckoChildProcessHost::InitializeChannel()
{
CreateChannel();
MonitorAutoEnter mon(mMonitor);
mChannelInitialized = true;
mon.Notify();
}
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)
# if defined(OS_LINUX)
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(XP_MACOSX)
// Call the stub for initialization side effects. Eventually this
// code will be unified with that above.
CrashReporter::CreateNotificationPipeForChild();
# endif // OS_LINUX
#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));
}
// On Win7+, pass the application user model to the child, so it can
// register with it. This insures windows created by the container
// properly group with the parent app on the Win7 taskbar.
nsCOMPtr<nsIWinTaskbar> taskbarInfo =
do_GetService(NS_TASKBAR_CONTRACTID);
PRBool set = PR_FALSE;
if (taskbarInfo) {
PRBool isSupported = PR_FALSE;
taskbarInfo->GetAvailable(&isSupported);
if (isSupported) {
// Set the id for the container.
nsAutoString appId, param;
param.Append(PRUnichar('\"'));
if (NS_SUCCEEDED(taskbarInfo->GetDefaultGroupId(appId))) {
param.Append(appId);
param.Append(PRUnichar('\"'));
cmdLine.AppendLooseValue(std::wstring(param.get()));
set = PR_TRUE;
}
}
}
if (!set) {
cmdLine.AppendLooseValue(std::wstring(L"-"));
}
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;
}
void
GeckoChildProcessHost::OnChannelConnected(int32 peer_pid)
{
MonitorAutoEnter mon(mMonitor);
mLaunched = true;
if (!base::OpenPrivilegedProcessHandle(peer_pid, &mChildProcessHandle))
NS_RUNTIMEABORT("can't open handle to child process");
mon.Notify();
}
// XXX/cjones: these next two methods should basically never be called.
// after the process is launched, its channel will be used to create
// one of our channels, AsyncChannel et al.
void
GeckoChildProcessHost::OnMessageReceived(const IPC::Message& aMsg)
{
}
void
GeckoChildProcessHost::OnChannelError()
{
// XXXbent Notify that the child process is gone?
}
void
GeckoChildProcessHost::OnWaitableEventSignaled(base::WaitableEvent *event)
{
if (mDelegate) {
mDelegate->OnWaitableEventSignaled(event);
}
ChildProcessHost::OnWaitableEventSignaled(event);
}