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gecko-dev/dom/ipc/ContentChild.cpp
Mike Conley 66da6c097f Bug 1066812 - Set AbortOnError in the ContentProcess on initialization. r=billm. 
This will cause the content process to take itself down in the event that it
loses communication with the parent process. This case is particularly
important for the case where the parent process crashes while the content
process is blocked or busy on the main thread, as the content process will
no longer continue to exist as a zombie process, but will shut down after
a short delay.

--HG--
extra : rebase_source : 52799d2cacdc72ca0c36200320b249961a3b638d
2015-02-13 14:10:56 -05:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifdef MOZ_WIDGET_GTK
#include <gtk/gtk.h>
#endif
#ifdef MOZ_WIDGET_QT
#include "nsQAppInstance.h"
#endif
#include "ContentChild.h"
#include "BlobChild.h"
#include "CrashReporterChild.h"
#include "GeckoProfiler.h"
#include "TabChild.h"
#include "mozilla/Attributes.h"
#ifdef ACCESSIBILITY
#include "mozilla/a11y/DocAccessibleChild.h"
#endif
#include "mozilla/Preferences.h"
#include "mozilla/ProcessHangMonitorIPC.h"
#include "mozilla/docshell/OfflineCacheUpdateChild.h"
#include "mozilla/dom/ContentBridgeChild.h"
#include "mozilla/dom/ContentBridgeParent.h"
#include "mozilla/dom/DOMStorageIPC.h"
#include "mozilla/dom/ExternalHelperAppChild.h"
#include "mozilla/dom/PCrashReporterChild.h"
#include "mozilla/dom/ProcessGlobal.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/asmjscache/AsmJSCache.h"
#include "mozilla/dom/asmjscache/PAsmJSCacheEntryChild.h"
#include "mozilla/dom/nsIContentChild.h"
#include "mozilla/hal_sandbox/PHalChild.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/ipc/FileDescriptorSetChild.h"
#include "mozilla/ipc/FileDescriptorUtils.h"
#include "mozilla/ipc/GeckoChildProcessHost.h"
#include "mozilla/ipc/TestShellChild.h"
#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
#include "mozilla/layers/CompositorChild.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "mozilla/layers/PCompositorChild.h"
#include "mozilla/layers/SharedBufferManagerChild.h"
#include "mozilla/net/NeckoChild.h"
#include "mozilla/plugins/PluginModuleParent.h"
#if defined(MOZ_CONTENT_SANDBOX)
#if defined(XP_WIN)
#define TARGET_SANDBOX_EXPORTS
#include "mozilla/sandboxTarget.h"
#include "nsDirectoryServiceDefs.h"
#elif defined(XP_LINUX)
#include "mozilla/Sandbox.h"
#include "mozilla/SandboxInfo.h"
#elif defined(XP_MACOSX)
#include "mozilla/Sandbox.h"
#endif
#endif
#include "mozilla/unused.h"
#include "mozInlineSpellChecker.h"
#include "nsIConsoleListener.h"
#include "nsICycleCollectorListener.h"
#include "nsIIPCBackgroundChildCreateCallback.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIMemoryReporter.h"
#include "nsIMemoryInfoDumper.h"
#include "nsIMutable.h"
#include "nsIObserverService.h"
#include "nsIScriptSecurityManager.h"
#include "nsScreenManagerProxy.h"
#include "nsMemoryInfoDumper.h"
#include "nsServiceManagerUtils.h"
#include "nsStyleSheetService.h"
#include "nsXULAppAPI.h"
#include "nsIScriptError.h"
#include "nsIConsoleService.h"
#include "nsJSEnvironment.h"
#include "SandboxHal.h"
#include "nsDebugImpl.h"
#include "nsHashPropertyBag.h"
#include "nsLayoutStylesheetCache.h"
#include "nsIJSRuntimeService.h"
#include "nsThreadManager.h"
#include "nsAnonymousTemporaryFile.h"
#include "nsISpellChecker.h"
#include "nsClipboardProxy.h"
#include "nsISystemMessageCache.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "IHistory.h"
#include "nsNetUtil.h"
#include "base/message_loop.h"
#include "base/process_util.h"
#include "base/task.h"
#include "nsChromeRegistryContent.h"
#include "nsFrameMessageManager.h"
#include "nsIGeolocationProvider.h"
#include "mozilla/dom/PMemoryReportRequestChild.h"
#include "mozilla/dom/PCycleCollectWithLogsChild.h"
#ifdef MOZ_PERMISSIONS
#include "nsIScriptSecurityManager.h"
#include "nsPermission.h"
#include "nsPermissionManager.h"
#endif
#include "PermissionMessageUtils.h"
#if defined(MOZ_WIDGET_ANDROID)
#include "APKOpen.h"
#endif
#if defined(MOZ_WIDGET_GONK)
#include "nsVolume.h"
#include "nsVolumeService.h"
#include "SpeakerManagerService.h"
#endif
#ifdef XP_WIN
#include <process.h>
#define getpid _getpid
#endif
#ifdef MOZ_X11
#include "mozilla/X11Util.h"
#endif
#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
#endif
#ifdef MOZ_NUWA_PROCESS
#include <setjmp.h>
#include "ipc/Nuwa.h"
#endif
#include "mozilla/dom/File.h"
#include "mozilla/dom/cellbroadcast/CellBroadcastIPCService.h"
#include "mozilla/dom/mobileconnection/MobileConnectionChild.h"
#include "mozilla/dom/mobilemessage/SmsChild.h"
#include "mozilla/dom/devicestorage/DeviceStorageRequestChild.h"
#include "mozilla/dom/PFileSystemRequestChild.h"
#include "mozilla/dom/FileSystemTaskBase.h"
#include "mozilla/dom/bluetooth/PBluetoothChild.h"
#include "mozilla/dom/PFMRadioChild.h"
#include "mozilla/ipc/InputStreamUtils.h"
#ifdef MOZ_WEBSPEECH
#include "mozilla/dom/PSpeechSynthesisChild.h"
#endif
#include "ProcessUtils.h"
#include "StructuredCloneUtils.h"
#include "URIUtils.h"
#include "nsContentUtils.h"
#include "nsIPrincipal.h"
#include "nsDeviceStorage.h"
#include "AudioChannelService.h"
#include "mozilla/dom/DataStoreService.h"
#include "mozilla/dom/telephony/PTelephonyChild.h"
#include "mozilla/dom/time/DateCacheCleaner.h"
#include "mozilla/dom/voicemail/VoicemailIPCService.h"
#include "mozilla/net/NeckoMessageUtils.h"
#include "mozilla/RemoteSpellCheckEngineChild.h"
using namespace mozilla;
using namespace mozilla::docshell;
using namespace mozilla::dom::bluetooth;
using namespace mozilla::dom::cellbroadcast;
using namespace mozilla::dom::devicestorage;
using namespace mozilla::dom::ipc;
using namespace mozilla::dom::mobileconnection;
using namespace mozilla::dom::mobilemessage;
using namespace mozilla::dom::telephony;
using namespace mozilla::dom::voicemail;
using namespace mozilla::embedding;
using namespace mozilla::hal_sandbox;
using namespace mozilla::ipc;
using namespace mozilla::layers;
using namespace mozilla::net;
using namespace mozilla::jsipc;
#if defined(MOZ_WIDGET_GONK)
using namespace mozilla::system;
#endif
using namespace mozilla::widget;
#ifdef MOZ_NUWA_PROCESS
static bool sNuwaForking = false;
// The size of the reserved stack (in unsigned ints). It's used to reserve space
// to push sigsetjmp() in NuwaCheckpointCurrentThread() to higher in the stack
// so that after it returns and do other work we don't garble the stack we want
// to preserve in NuwaCheckpointCurrentThread().
#define RESERVED_INT_STACK 128
// A sentinel value for checking whether RESERVED_INT_STACK is large enough.
#define STACK_SENTINEL_VALUE 0xdeadbeef
#endif
namespace mozilla {
namespace dom {
class MemoryReportRequestChild : public PMemoryReportRequestChild,
public nsIRunnable
{
public:
NS_DECL_ISUPPORTS
MemoryReportRequestChild(uint32_t aGeneration, bool aAnonymize,
const MaybeFileDesc& aDMDFile);
NS_IMETHOD Run() MOZ_OVERRIDE;
private:
virtual ~MemoryReportRequestChild();
uint32_t mGeneration;
bool mAnonymize;
FileDescriptor mDMDFile;
};
NS_IMPL_ISUPPORTS(MemoryReportRequestChild, nsIRunnable)
MemoryReportRequestChild::MemoryReportRequestChild(
uint32_t aGeneration, bool aAnonymize, const MaybeFileDesc& aDMDFile)
: mGeneration(aGeneration), mAnonymize(aAnonymize)
{
MOZ_COUNT_CTOR(MemoryReportRequestChild);
if (aDMDFile.type() == MaybeFileDesc::TFileDescriptor) {
mDMDFile = aDMDFile.get_FileDescriptor();
}
}
MemoryReportRequestChild::~MemoryReportRequestChild()
{
MOZ_COUNT_DTOR(MemoryReportRequestChild);
}
// IPC sender for remote GC/CC logging.
class CycleCollectWithLogsChild MOZ_FINAL
: public PCycleCollectWithLogsChild
, public nsICycleCollectorLogSink
{
public:
NS_DECL_ISUPPORTS
CycleCollectWithLogsChild(const FileDescriptor& aGCLog,
const FileDescriptor& aCCLog)
{
mGCLog = FileDescriptorToFILE(aGCLog, "w");
mCCLog = FileDescriptorToFILE(aCCLog, "w");
}
NS_IMETHOD Open(FILE** aGCLog, FILE** aCCLog) MOZ_OVERRIDE
{
if (NS_WARN_IF(!mGCLog) || NS_WARN_IF(!mCCLog)) {
return NS_ERROR_FAILURE;
}
*aGCLog = mGCLog;
*aCCLog = mCCLog;
return NS_OK;
}
NS_IMETHOD CloseGCLog() MOZ_OVERRIDE
{
MOZ_ASSERT(mGCLog);
fclose(mGCLog);
mGCLog = nullptr;
SendCloseGCLog();
return NS_OK;
}
NS_IMETHOD CloseCCLog() MOZ_OVERRIDE
{
MOZ_ASSERT(mCCLog);
fclose(mCCLog);
mCCLog = nullptr;
SendCloseCCLog();
return NS_OK;
}
NS_IMETHOD GetFilenameIdentifier(nsAString& aIdentifier) MOZ_OVERRIDE
{
return UnimplementedProperty();
}
NS_IMETHOD SetFilenameIdentifier(const nsAString& aIdentifier) MOZ_OVERRIDE
{
return UnimplementedProperty();
}
NS_IMETHOD GetProcessIdentifier(int32_t *aIdentifier) MOZ_OVERRIDE
{
return UnimplementedProperty();
}
NS_IMETHOD SetProcessIdentifier(int32_t aIdentifier) MOZ_OVERRIDE
{
return UnimplementedProperty();
}
NS_IMETHOD GetGcLog(nsIFile** aPath) MOZ_OVERRIDE
{
return UnimplementedProperty();
}
NS_IMETHOD GetCcLog(nsIFile** aPath) MOZ_OVERRIDE
{
return UnimplementedProperty();
}
private:
~CycleCollectWithLogsChild()
{
if (mGCLog) {
fclose(mGCLog);
mGCLog = nullptr;
}
if (mCCLog) {
fclose(mCCLog);
mCCLog = nullptr;
}
// The XPCOM refcount drives the IPC lifecycle; see also
// DeallocPCycleCollectWithLogsChild.
unused << Send__delete__(this);
}
nsresult UnimplementedProperty()
{
MOZ_ASSERT(false, "This object is a remote GC/CC logger;"
" this property isn't meaningful.");
return NS_ERROR_UNEXPECTED;
}
FILE* mGCLog;
FILE* mCCLog;
};
NS_IMPL_ISUPPORTS(CycleCollectWithLogsChild, nsICycleCollectorLogSink);
class AlertObserver
{
public:
AlertObserver(nsIObserver *aObserver, const nsString& aData)
: mObserver(aObserver)
, mData(aData)
{
}
~AlertObserver() {}
bool ShouldRemoveFrom(nsIObserver* aObserver,
const nsString& aData) const
{
return (mObserver == aObserver &&
mData == aData);
}
bool Observes(const nsString& aData) const
{
return mData.Equals(aData);
}
bool Notify(const nsCString& aType) const
{
mObserver->Observe(nullptr, aType.get(), mData.get());
return true;
}
private:
nsCOMPtr<nsIObserver> mObserver;
nsString mData;
};
class ConsoleListener MOZ_FINAL : public nsIConsoleListener
{
public:
explicit ConsoleListener(ContentChild* aChild)
: mChild(aChild) {}
NS_DECL_ISUPPORTS
NS_DECL_NSICONSOLELISTENER
private:
~ConsoleListener() {}
ContentChild* mChild;
friend class ContentChild;
};
NS_IMPL_ISUPPORTS(ConsoleListener, nsIConsoleListener)
NS_IMETHODIMP
ConsoleListener::Observe(nsIConsoleMessage* aMessage)
{
if (!mChild)
return NS_OK;
nsCOMPtr<nsIScriptError> scriptError = do_QueryInterface(aMessage);
if (scriptError) {
nsString msg, sourceName, sourceLine;
nsXPIDLCString category;
uint32_t lineNum, colNum, flags;
nsresult rv = scriptError->GetErrorMessage(msg);
NS_ENSURE_SUCCESS(rv, rv);
rv = scriptError->GetSourceName(sourceName);
NS_ENSURE_SUCCESS(rv, rv);
rv = scriptError->GetSourceLine(sourceLine);
NS_ENSURE_SUCCESS(rv, rv);
// Before we send the error to the parent process (which
// involves copying the memory), truncate any long lines. CSS
// errors in particular share the memory for long lines with
// repeated errors, but the IPC communication we're about to do
// will break that sharing, so we better truncate now.
if (sourceLine.Length() > 1000) {
sourceLine.Truncate(1000);
}
rv = scriptError->GetCategory(getter_Copies(category));
NS_ENSURE_SUCCESS(rv, rv);
rv = scriptError->GetLineNumber(&lineNum);
NS_ENSURE_SUCCESS(rv, rv);
rv = scriptError->GetColumnNumber(&colNum);
NS_ENSURE_SUCCESS(rv, rv);
rv = scriptError->GetFlags(&flags);
NS_ENSURE_SUCCESS(rv, rv);
mChild->SendScriptError(msg, sourceName, sourceLine,
lineNum, colNum, flags, category);
return NS_OK;
}
nsXPIDLString msg;
nsresult rv = aMessage->GetMessageMoz(getter_Copies(msg));
NS_ENSURE_SUCCESS(rv, rv);
mChild->SendConsoleMessage(msg);
return NS_OK;
}
class SystemMessageHandledObserver MOZ_FINAL : public nsIObserver
{
~SystemMessageHandledObserver() {}
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
void Init();
};
void SystemMessageHandledObserver::Init()
{
nsCOMPtr<nsIObserverService> os =
mozilla::services::GetObserverService();
if (os) {
os->AddObserver(this, "handle-system-messages-done",
/* ownsWeak */ false);
}
}
NS_IMETHODIMP
SystemMessageHandledObserver::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData)
{
if (ContentChild::GetSingleton()) {
ContentChild::GetSingleton()->SendSystemMessageHandled();
}
return NS_OK;
}
NS_IMPL_ISUPPORTS(SystemMessageHandledObserver, nsIObserver)
class BackgroundChildPrimer MOZ_FINAL :
public nsIIPCBackgroundChildCreateCallback
{
public:
BackgroundChildPrimer()
{ }
NS_DECL_ISUPPORTS
private:
~BackgroundChildPrimer()
{ }
virtual void
ActorCreated(PBackgroundChild* aActor) MOZ_OVERRIDE
{
MOZ_ASSERT(aActor, "Failed to create a PBackgroundChild actor!");
}
virtual void
ActorFailed() MOZ_OVERRIDE
{
MOZ_CRASH("Failed to create a PBackgroundChild actor!");
}
};
NS_IMPL_ISUPPORTS(BackgroundChildPrimer, nsIIPCBackgroundChildCreateCallback)
ContentChild* ContentChild::sSingleton;
static void
PostForkPreload()
{
TabChild::PostForkPreload();
}
// Performs initialization that is not fork-safe, i.e. that must be done after
// forking from the Nuwa process.
static void
InitOnContentProcessCreated()
{
#ifdef MOZ_NUWA_PROCESS
// Wait until we are forked from Nuwa
if (IsNuwaProcess()) {
return;
}
PostForkPreload();
#endif
nsCOMPtr<nsISystemMessageCache> smc =
do_GetService("@mozilla.org/system-message-cache;1");
NS_WARN_IF(!smc);
// This will register cross-process observer.
mozilla::dom::time::InitializeDateCacheCleaner();
}
#if defined(MOZ_TASK_TRACER) && defined(MOZ_NUWA_PROCESS)
static void
ReinitTaskTracer(void* /*aUnused*/)
{
mozilla::tasktracer::InitTaskTracer(
mozilla::tasktracer::FORKED_AFTER_NUWA);
}
#endif
ContentChild::ContentChild()
: mID(uint64_t(-1))
#ifdef ANDROID
,mScreenSize(0, 0)
#endif
, mCanOverrideProcessName(true)
, mIsAlive(true)
{
// This process is a content process, so it's clearly running in
// multiprocess mode!
nsDebugImpl::SetMultiprocessMode("Child");
}
ContentChild::~ContentChild()
{
}
NS_INTERFACE_MAP_BEGIN(ContentChild)
NS_INTERFACE_MAP_ENTRY(nsIContentChild)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
bool
ContentChild::Init(MessageLoop* aIOLoop,
base::ProcessHandle aParentHandle,
IPC::Channel* aChannel)
{
#ifdef MOZ_WIDGET_GTK
// sigh
gtk_init(nullptr, nullptr);
#endif
#ifdef MOZ_WIDGET_QT
// sigh, seriously
nsQAppInstance::AddRef();
#endif
#ifdef MOZ_X11
// Do this after initializing GDK, or GDK will install its own handler.
XRE_InstallX11ErrorHandler();
#endif
#ifdef MOZ_NUWA_PROCESS
SetTransport(aChannel);
#endif
NS_ASSERTION(!sSingleton, "only one ContentChild per child");
// Once we start sending IPC messages, we need the thread manager to be
// initialized so we can deal with the responses. Do that here before we
// try to construct the crash reporter.
nsresult rv = nsThreadManager::get()->Init();
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
if (!Open(aChannel, aParentHandle, aIOLoop)) {
return false;
}
sSingleton = this;
// Make sure there's an nsAutoScriptBlocker on the stack when dispatching
// urgent messages.
GetIPCChannel()->BlockScripts();
// If communications with the parent have broken down, take the process
// down so it's not hanging around.
GetIPCChannel()->SetAbortOnError(true);
#ifdef MOZ_X11
// Send the parent our X socket to act as a proxy reference for our X
// resources.
int xSocketFd = ConnectionNumber(DefaultXDisplay());
SendBackUpXResources(FileDescriptor(xSocketFd));
#endif
#ifdef MOZ_CRASHREPORTER
SendPCrashReporterConstructor(CrashReporter::CurrentThreadId(),
XRE_GetProcessType());
#endif
GetCPOWManager();
SendGetProcessAttributes(&mID, &mIsForApp, &mIsForBrowser);
InitProcessAttributes();
#if defined(MOZ_TASK_TRACER) && defined (MOZ_NUWA_PROCESS)
if (IsNuwaProcess()) {
NuwaAddConstructor(ReinitTaskTracer, nullptr);
}
#endif
return true;
}
void
ContentChild::InitProcessAttributes()
{
#ifdef MOZ_WIDGET_GONK
#ifdef MOZ_NUWA_PROCESS
if (IsNuwaProcess()) {
SetProcessName(NS_LITERAL_STRING("(Nuwa)"), false);
return;
}
#endif
if (mIsForApp && !mIsForBrowser) {
SetProcessName(NS_LITERAL_STRING("(Preallocated app)"), false);
} else {
SetProcessName(NS_LITERAL_STRING("Browser"), false);
}
#else
SetProcessName(NS_LITERAL_STRING("Web Content"), true);
#endif
}
void
ContentChild::SetProcessName(const nsAString& aName, bool aDontOverride)
{
if (!mCanOverrideProcessName) {
return;
}
char* name;
if ((name = PR_GetEnv("MOZ_DEBUG_APP_PROCESS")) &&
aName.EqualsASCII(name)) {
#ifdef OS_POSIX
printf_stderr("\n\nCHILDCHILDCHILDCHILD\n [%s] debug me @%d\n\n", name, getpid());
sleep(30);
#elif defined(OS_WIN)
// Windows has a decent JIT debugging story, so NS_DebugBreak does the
// right thing.
NS_DebugBreak(NS_DEBUG_BREAK,
"Invoking NS_DebugBreak() to debug child process",
nullptr, __FILE__, __LINE__);
#endif
}
mProcessName = aName;
mozilla::ipc::SetThisProcessName(NS_LossyConvertUTF16toASCII(aName).get());
if (aDontOverride) {
mCanOverrideProcessName = false;
}
}
void
ContentChild::GetProcessName(nsAString& aName)
{
aName.Assign(mProcessName);
}
bool
ContentChild::IsAlive()
{
return mIsAlive;
}
void
ContentChild::GetProcessName(nsACString& aName)
{
aName.Assign(NS_ConvertUTF16toUTF8(mProcessName));
}
/* static */ void
ContentChild::AppendProcessId(nsACString& aName)
{
if (!aName.IsEmpty()) {
aName.Append(' ');
}
unsigned pid = getpid();
aName.Append(nsPrintfCString("(pid %u)", pid));
}
void
ContentChild::InitXPCOM()
{
// Do this as early as possible to get the parent process to initialize the
// background thread since we'll likely need database information very soon.
BackgroundChild::Startup();
nsCOMPtr<nsIIPCBackgroundChildCreateCallback> callback =
new BackgroundChildPrimer();
if (!BackgroundChild::GetOrCreateForCurrentThread(callback)) {
MOZ_CRASH("Failed to create PBackgroundChild!");
}
BlobChild::Startup(BlobChild::FriendKey());
nsCOMPtr<nsIConsoleService> svc(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (!svc) {
NS_WARNING("Couldn't acquire console service");
return;
}
mConsoleListener = new ConsoleListener(this);
if (NS_FAILED(svc->RegisterListener(mConsoleListener)))
NS_WARNING("Couldn't register console listener for child process");
bool isOffline;
ClipboardCapabilities clipboardCaps;
SendGetXPCOMProcessAttributes(&isOffline, &mAvailableDictionaries, &clipboardCaps);
RecvSetOffline(isOffline);
nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1"));
if (nsCOMPtr<nsIClipboardProxy> clipboardProxy = do_QueryInterface(clipboard)) {
clipboardProxy->SetCapabilities(clipboardCaps);
}
DebugOnly<FileUpdateDispatcher*> observer = FileUpdateDispatcher::GetSingleton();
NS_ASSERTION(observer, "FileUpdateDispatcher is null");
// This object is held alive by the observer service.
nsRefPtr<SystemMessageHandledObserver> sysMsgObserver =
new SystemMessageHandledObserver();
sysMsgObserver->Init();
InitOnContentProcessCreated();
}
a11y::PDocAccessibleChild*
ContentChild::AllocPDocAccessibleChild(PDocAccessibleChild*, const uint64_t&)
{
MOZ_ASSERT(false, "should never call this!");
return nullptr;
}
bool
ContentChild::DeallocPDocAccessibleChild(a11y::PDocAccessibleChild* aChild)
{
#ifdef ACCESSIBILITY
delete static_cast<mozilla::a11y::DocAccessibleChild*>(aChild);
#endif
return true;
}
PMemoryReportRequestChild*
ContentChild::AllocPMemoryReportRequestChild(const uint32_t& aGeneration,
const bool &aAnonymize,
const bool &aMinimizeMemoryUsage,
const MaybeFileDesc& aDMDFile)
{
MemoryReportRequestChild *actor =
new MemoryReportRequestChild(aGeneration, aAnonymize, aDMDFile);
actor->AddRef();
return actor;
}
// This is just a wrapper for InfallibleTArray<MemoryReport> that implements
// nsISupports, so it can be passed to nsIMemoryReporter::CollectReports.
class MemoryReportsWrapper MOZ_FINAL : public nsISupports {
~MemoryReportsWrapper() {}
public:
NS_DECL_ISUPPORTS
explicit MemoryReportsWrapper(InfallibleTArray<MemoryReport>* r) : mReports(r) { }
InfallibleTArray<MemoryReport> *mReports;
};
NS_IMPL_ISUPPORTS0(MemoryReportsWrapper)
class MemoryReportCallback MOZ_FINAL : public nsIMemoryReporterCallback
{
public:
NS_DECL_ISUPPORTS
explicit MemoryReportCallback(const nsACString& aProcess)
: mProcess(aProcess)
{
}
NS_IMETHOD Callback(const nsACString& aProcess, const nsACString &aPath,
int32_t aKind, int32_t aUnits, int64_t aAmount,
const nsACString& aDescription,
nsISupports* aiWrappedReports) MOZ_OVERRIDE
{
MemoryReportsWrapper *wrappedReports =
static_cast<MemoryReportsWrapper *>(aiWrappedReports);
MemoryReport memreport(mProcess, nsCString(aPath), aKind, aUnits,
aAmount, nsCString(aDescription));
wrappedReports->mReports->AppendElement(memreport);
return NS_OK;
}
private:
~MemoryReportCallback() {}
const nsCString mProcess;
};
NS_IMPL_ISUPPORTS(
MemoryReportCallback
, nsIMemoryReporterCallback
)
bool
ContentChild::RecvPMemoryReportRequestConstructor(
PMemoryReportRequestChild* aChild,
const uint32_t& aGeneration,
const bool& aAnonymize,
const bool& aMinimizeMemoryUsage,
const MaybeFileDesc& aDMDFile)
{
MemoryReportRequestChild *actor =
static_cast<MemoryReportRequestChild*>(aChild);
nsresult rv;
if (aMinimizeMemoryUsage) {
nsCOMPtr<nsIMemoryReporterManager> mgr = do_GetService("@mozilla.org/memory-reporter-manager;1");
rv = mgr->MinimizeMemoryUsage(actor);
// mgr will eventually call actor->Run()
} else {
rv = actor->Run();
}
return !NS_WARN_IF(NS_FAILED(rv));
}
NS_IMETHODIMP MemoryReportRequestChild::Run()
{
ContentChild *child = static_cast<ContentChild*>(Manager());
nsCOMPtr<nsIMemoryReporterManager> mgr = do_GetService("@mozilla.org/memory-reporter-manager;1");
InfallibleTArray<MemoryReport> reports;
nsCString process;
child->GetProcessName(process);
child->AppendProcessId(process);
// Run the reporters. The callback will turn each measurement into a
// MemoryReport.
nsRefPtr<MemoryReportsWrapper> wrappedReports =
new MemoryReportsWrapper(&reports);
nsRefPtr<MemoryReportCallback> cb = new MemoryReportCallback(process);
mgr->GetReportsForThisProcessExtended(cb, wrappedReports, mAnonymize,
FileDescriptorToFILE(mDMDFile, "wb"));
bool sent = Send__delete__(this, mGeneration, reports);
return sent ? NS_OK : NS_ERROR_FAILURE;
}
bool
ContentChild::RecvAudioChannelNotify()
{
nsRefPtr<AudioChannelService> service =
AudioChannelService::GetAudioChannelService();
if (service) {
service->Notify();
}
return true;
}
bool
ContentChild::RecvDataStoreNotify(const uint32_t& aAppId,
const nsString& aName,
const nsString& aManifestURL)
{
nsRefPtr<DataStoreService> service = DataStoreService::GetOrCreate();
if (NS_WARN_IF(!service)) {
return false;
}
nsresult rv = service->EnableDataStore(aAppId, aName, aManifestURL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
return true;
}
bool
ContentChild::DeallocPMemoryReportRequestChild(PMemoryReportRequestChild* actor)
{
static_cast<MemoryReportRequestChild*>(actor)->Release();
return true;
}
PCycleCollectWithLogsChild*
ContentChild::AllocPCycleCollectWithLogsChild(const bool& aDumpAllTraces,
const FileDescriptor& aGCLog,
const FileDescriptor& aCCLog)
{
CycleCollectWithLogsChild* actor = new CycleCollectWithLogsChild(aGCLog, aCCLog);
// Return actor with refcount 0, which is safe because it has a non-XPCOM type.
return actor;
}
bool
ContentChild::RecvPCycleCollectWithLogsConstructor(PCycleCollectWithLogsChild* aActor,
const bool& aDumpAllTraces,
const FileDescriptor& aGCLog,
const FileDescriptor& aCCLog)
{
// Take a reference here, where the XPCOM type is regained.
nsRefPtr<CycleCollectWithLogsChild> sink = static_cast<CycleCollectWithLogsChild*>(aActor);
nsCOMPtr<nsIMemoryInfoDumper> dumper = do_GetService("@mozilla.org/memory-info-dumper;1");
dumper->DumpGCAndCCLogsToSink(aDumpAllTraces, sink);
// The actor's destructor is called when the last reference goes away...
return true;
}
bool
ContentChild::DeallocPCycleCollectWithLogsChild(PCycleCollectWithLogsChild* /* aActor */)
{
// ...so when we get here, there's nothing for us to do.
//
// Also, we're already in ~CycleCollectWithLogsChild (q.v.) at
// this point, so we shouldn't touch the actor in any case.
return true;
}
mozilla::plugins::PPluginModuleParent*
ContentChild::AllocPPluginModuleParent(mozilla::ipc::Transport* aTransport,
base::ProcessId aOtherProcess)
{
return plugins::PluginModuleContentParent::Initialize(aTransport, aOtherProcess);
}
PContentBridgeChild*
ContentChild::AllocPContentBridgeChild(mozilla::ipc::Transport* aTransport,
base::ProcessId aOtherProcess)
{
return ContentBridgeChild::Create(aTransport, aOtherProcess);
}
PContentBridgeParent*
ContentChild::AllocPContentBridgeParent(mozilla::ipc::Transport* aTransport,
base::ProcessId aOtherProcess)
{
MOZ_ASSERT(!mLastBridge);
mLastBridge = static_cast<ContentBridgeParent*>(
ContentBridgeParent::Create(aTransport, aOtherProcess));
return mLastBridge;
}
PCompositorChild*
ContentChild::AllocPCompositorChild(mozilla::ipc::Transport* aTransport,
base::ProcessId aOtherProcess)
{
return CompositorChild::Create(aTransport, aOtherProcess);
}
PSharedBufferManagerChild*
ContentChild::AllocPSharedBufferManagerChild(mozilla::ipc::Transport* aTransport,
base::ProcessId aOtherProcess)
{
return SharedBufferManagerChild::StartUpInChildProcess(aTransport, aOtherProcess);
}
PImageBridgeChild*
ContentChild::AllocPImageBridgeChild(mozilla::ipc::Transport* aTransport,
base::ProcessId aOtherProcess)
{
return ImageBridgeChild::StartUpInChildProcess(aTransport, aOtherProcess);
}
PBackgroundChild*
ContentChild::AllocPBackgroundChild(Transport* aTransport,
ProcessId aOtherProcess)
{
return BackgroundChild::Alloc(aTransport, aOtherProcess);
}
PProcessHangMonitorChild*
ContentChild::AllocPProcessHangMonitorChild(Transport* aTransport,
ProcessId aOtherProcess)
{
return CreateHangMonitorChild(aTransport, aOtherProcess);
}
#if defined(XP_WIN) && defined(MOZ_CONTENT_SANDBOX)
static void
SetUpSandboxEnvironment()
{
// Set up a low integrity temp directory. This only makes sense if the
// delayed integrity level for the content process is INTEGRITY_LEVEL_LOW.
nsresult rv;
nsCOMPtr<nsIProperties> directoryService =
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
nsCOMPtr<nsIFile> lowIntegrityTemp;
rv = directoryService->Get(NS_WIN_LOW_INTEGRITY_TEMP, NS_GET_IID(nsIFile),
getter_AddRefs(lowIntegrityTemp));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
// Undefine returns a failure if the property is not already set.
unused << directoryService->Undefine(NS_OS_TEMP_DIR);
rv = directoryService->Set(NS_OS_TEMP_DIR, lowIntegrityTemp);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
// Set TEMP and TMP environment variables.
nsAutoString lowIntegrityTempPath;
rv = lowIntegrityTemp->GetPath(lowIntegrityTempPath);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
bool setOK = SetEnvironmentVariableW(L"TEMP", lowIntegrityTempPath.get());
NS_WARN_IF_FALSE(setOK, "Failed to set TEMP to low integrity temp path");
setOK = SetEnvironmentVariableW(L"TMP", lowIntegrityTempPath.get());
NS_WARN_IF_FALSE(setOK, "Failed to set TMP to low integrity temp path");
}
void
ContentChild::CleanUpSandboxEnvironment()
{
// Sandbox environment is only currently set up with the more strict sandbox.
if (!Preferences::GetBool("security.sandbox.windows.content.moreStrict")) {
return;
}
nsresult rv;
nsCOMPtr<nsIProperties> directoryService =
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
nsCOMPtr<nsIFile> lowIntegrityTemp;
rv = directoryService->Get(NS_WIN_LOW_INTEGRITY_TEMP, NS_GET_IID(nsIFile),
getter_AddRefs(lowIntegrityTemp));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
// Don't check the return value as the directory will only have been created
// if it has been used.
unused << lowIntegrityTemp->Remove(/* aRecursive */ true);
}
#endif
#if defined(XP_MACOSX) && defined(MOZ_CONTENT_SANDBOX)
#include <stdlib.h>
static bool
GetAppPaths(nsCString &aAppPath, nsCString &aAppBinaryPath, nsCString &aAppDir)
{
nsAutoCString appPath;
nsAutoCString appBinaryPath(
(CommandLine::ForCurrentProcess()->argv()[0]).c_str());
nsAutoCString::const_iterator start, end;
appBinaryPath.BeginReading(start);
appBinaryPath.EndReading(end);
if (RFindInReadable(NS_LITERAL_CSTRING(".app/Contents/MacOS/"), start, end)) {
end = start;
++end; ++end; ++end; ++end;
appBinaryPath.BeginReading(start);
appPath.Assign(Substring(start, end));
} else {
return false;
}
nsCOMPtr<nsIFile> app, appBinary;
nsresult rv = NS_NewLocalFile(NS_ConvertUTF8toUTF16(appPath),
true, getter_AddRefs(app));
if (NS_FAILED(rv)) {
return false;
}
rv = NS_NewLocalFile(NS_ConvertUTF8toUTF16(appBinaryPath),
true, getter_AddRefs(appBinary));
if (NS_FAILED(rv)) {
return false;
}
nsCOMPtr<nsIFile> appDir;
nsCOMPtr<nsIProperties> dirSvc =
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID);
if (!dirSvc) {
return false;
}
rv = dirSvc->Get(NS_XPCOM_CURRENT_PROCESS_DIR,
NS_GET_IID(nsIFile), getter_AddRefs(appDir));
if (NS_FAILED(rv)) {
return false;
}
bool exists;
rv = appDir->Exists(&exists);
if (NS_FAILED(rv) || !exists) {
return false;
}
bool isLink;
app->IsSymlink(&isLink);
if (isLink) {
app->GetNativeTarget(aAppPath);
} else {
app->GetNativePath(aAppPath);
}
appBinary->IsSymlink(&isLink);
if (isLink) {
appBinary->GetNativeTarget(aAppBinaryPath);
} else {
appBinary->GetNativePath(aAppBinaryPath);
}
appDir->IsSymlink(&isLink);
if (isLink) {
appDir->GetNativeTarget(aAppDir);
} else {
appDir->GetNativePath(aAppDir);
}
return true;
}
static void
StartMacOSContentSandbox()
{
nsAutoCString appPath, appBinaryPath, appDir;
if (!GetAppPaths(appPath, appBinaryPath, appDir)) {
MOZ_CRASH("Error resolving child process path");
}
MacSandboxInfo info;
info.type = MacSandboxType_Content;
info.appPath.Assign(appPath);
info.appBinaryPath.Assign(appBinaryPath);
info.appDir.Assign(appDir);
nsAutoCString err;
if (!mozilla::StartMacSandbox(info, err)) {
NS_WARNING(err.get());
MOZ_CRASH("sandbox_init() failed");
}
}
#endif
bool
ContentChild::RecvSetProcessSandbox()
{
// We may want to move the sandbox initialization somewhere else
// at some point; see bug 880808.
#if defined(MOZ_CONTENT_SANDBOX)
#if defined(XP_LINUX)
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 19
// For B2G >= KitKat, sandboxing is mandatory; this has already
// been enforced by ContentParent::StartUp().
MOZ_ASSERT(SandboxInfo::Get().CanSandboxContent());
#else
// Otherwise, sandboxing is best-effort.
if (!SandboxInfo::Get().CanSandboxContent()) {
return true;
}
#endif
SetContentProcessSandbox();
#elif defined(XP_WIN)
mozilla::SandboxTarget::Instance()->StartSandbox();
if (Preferences::GetBool("security.sandbox.windows.content.moreStrict")) {
SetUpSandboxEnvironment();
}
#elif defined(XP_MACOSX)
StartMacOSContentSandbox();
#endif
#endif
return true;
}
bool
ContentChild::RecvSpeakerManagerNotify()
{
#ifdef MOZ_WIDGET_GONK
// Only notify the process which has the SpeakerManager instance.
nsRefPtr<SpeakerManagerService> service =
SpeakerManagerService::GetSpeakerManagerService();
if (service) {
service->Notify();
}
return true;
#endif
return false;
}
static CancelableTask* sFirstIdleTask;
static void FirstIdle(void)
{
MOZ_ASSERT(sFirstIdleTask);
sFirstIdleTask = nullptr;
ContentChild::GetSingleton()->SendFirstIdle();
}
mozilla::jsipc::PJavaScriptChild *
ContentChild::AllocPJavaScriptChild()
{
MOZ_ASSERT(!ManagedPJavaScriptChild().Length());
return nsIContentChild::AllocPJavaScriptChild();
}
bool
ContentChild::DeallocPJavaScriptChild(PJavaScriptChild *aChild)
{
return nsIContentChild::DeallocPJavaScriptChild(aChild);
}
PBrowserChild*
ContentChild::AllocPBrowserChild(const TabId& aTabId,
const IPCTabContext& aContext,
const uint32_t& aChromeFlags,
const ContentParentId& aCpID,
const bool& aIsForApp,
const bool& aIsForBrowser)
{
return nsIContentChild::AllocPBrowserChild(aTabId,
aContext,
aChromeFlags,
aCpID,
aIsForApp,
aIsForBrowser);
}
bool
ContentChild::SendPBrowserConstructor(PBrowserChild* aActor,
const TabId& aTabId,
const IPCTabContext& aContext,
const uint32_t& aChromeFlags,
const ContentParentId& aCpID,
const bool& aIsForApp,
const bool& aIsForBrowser)
{
return PContentChild::SendPBrowserConstructor(aActor,
aTabId,
aContext,
aChromeFlags,
aCpID,
aIsForApp,
aIsForBrowser);
}
bool
ContentChild::RecvPBrowserConstructor(PBrowserChild* aActor,
const TabId& aTabId,
const IPCTabContext& aContext,
const uint32_t& aChromeFlags,
const ContentParentId& aCpID,
const bool& aIsForApp,
const bool& aIsForBrowser)
{
// This runs after AllocPBrowserChild() returns and the IPC machinery for this
// PBrowserChild has been set up.
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (os) {
nsITabChild* tc =
static_cast<nsITabChild*>(static_cast<TabChild*>(aActor));
os->NotifyObservers(tc, "tab-child-created", nullptr);
}
static bool hasRunOnce = false;
if (!hasRunOnce) {
hasRunOnce = true;
MOZ_ASSERT(!sFirstIdleTask);
sFirstIdleTask = NewRunnableFunction(FirstIdle);
MessageLoop::current()->PostIdleTask(FROM_HERE, sFirstIdleTask);
// Redo InitProcessAttributes() when the app or browser is really
// launching so the attributes will be correct.
mID = aCpID;
mIsForApp = aIsForApp;
mIsForBrowser = aIsForBrowser;
InitProcessAttributes();
}
return true;
}
void
ContentChild::GetAvailableDictionaries(InfallibleTArray<nsString>& aDictionaries)
{
aDictionaries = mAvailableDictionaries;
}
PFileDescriptorSetChild*
ContentChild::AllocPFileDescriptorSetChild(const FileDescriptor& aFD)
{
return new FileDescriptorSetChild(aFD);
}
bool
ContentChild::DeallocPFileDescriptorSetChild(PFileDescriptorSetChild* aActor)
{
delete static_cast<FileDescriptorSetChild*>(aActor);
return true;
}
bool
ContentChild::DeallocPBrowserChild(PBrowserChild* aIframe)
{
return nsIContentChild::DeallocPBrowserChild(aIframe);
}
PBlobChild*
ContentChild::AllocPBlobChild(const BlobConstructorParams& aParams)
{
return nsIContentChild::AllocPBlobChild(aParams);
}
mozilla::PRemoteSpellcheckEngineChild *
ContentChild::AllocPRemoteSpellcheckEngineChild()
{
NS_NOTREACHED("Default Constructor for PRemoteSpellcheckEngineChild should never be called");
return nullptr;
}
bool
ContentChild::DeallocPRemoteSpellcheckEngineChild(PRemoteSpellcheckEngineChild *child)
{
delete child;
return true;
}
bool
ContentChild::DeallocPBlobChild(PBlobChild* aActor)
{
return nsIContentChild::DeallocPBlobChild(aActor);
}
PBlobChild*
ContentChild::SendPBlobConstructor(PBlobChild* aActor,
const BlobConstructorParams& aParams)
{
return PContentChild::SendPBlobConstructor(aActor, aParams);
}
PCrashReporterChild*
ContentChild::AllocPCrashReporterChild(const mozilla::dom::NativeThreadId& id,
const uint32_t& processType)
{
#ifdef MOZ_CRASHREPORTER
return new CrashReporterChild();
#else
return nullptr;
#endif
}
bool
ContentChild::DeallocPCrashReporterChild(PCrashReporterChild* crashreporter)
{
delete crashreporter;
return true;
}
PHalChild*
ContentChild::AllocPHalChild()
{
return CreateHalChild();
}
bool
ContentChild::DeallocPHalChild(PHalChild* aHal)
{
delete aHal;
return true;
}
asmjscache::PAsmJSCacheEntryChild*
ContentChild::AllocPAsmJSCacheEntryChild(
const asmjscache::OpenMode& aOpenMode,
const asmjscache::WriteParams& aWriteParams,
const IPC::Principal& aPrincipal)
{
NS_NOTREACHED("Should never get here!");
return nullptr;
}
bool
ContentChild::DeallocPAsmJSCacheEntryChild(PAsmJSCacheEntryChild* aActor)
{
asmjscache::DeallocEntryChild(aActor);
return true;
}
PTestShellChild*
ContentChild::AllocPTestShellChild()
{
return new TestShellChild();
}
bool
ContentChild::DeallocPTestShellChild(PTestShellChild* shell)
{
delete shell;
return true;
}
jsipc::CPOWManager*
ContentChild::GetCPOWManager()
{
if (ManagedPJavaScriptChild().Length()) {
return CPOWManagerFor(ManagedPJavaScriptChild()[0]);
}
return CPOWManagerFor(SendPJavaScriptConstructor());
}
bool
ContentChild::RecvPTestShellConstructor(PTestShellChild* actor)
{
return true;
}
PDeviceStorageRequestChild*
ContentChild::AllocPDeviceStorageRequestChild(const DeviceStorageParams& aParams)
{
return new DeviceStorageRequestChild();
}
bool
ContentChild::DeallocPDeviceStorageRequestChild(PDeviceStorageRequestChild* aDeviceStorage)
{
delete aDeviceStorage;
return true;
}
PFileSystemRequestChild*
ContentChild::AllocPFileSystemRequestChild(const FileSystemParams& aParams)
{
NS_NOTREACHED("Should never get here!");
return nullptr;
}
bool
ContentChild::DeallocPFileSystemRequestChild(PFileSystemRequestChild* aFileSystem)
{
mozilla::dom::FileSystemTaskBase* child =
static_cast<mozilla::dom::FileSystemTaskBase*>(aFileSystem);
// The reference is increased in FileSystemTaskBase::Start of
// FileSystemTaskBase.cpp. We should decrease it after IPC.
NS_RELEASE(child);
return true;
}
PMobileConnectionChild*
ContentChild::SendPMobileConnectionConstructor(PMobileConnectionChild* aActor,
const uint32_t& aClientId)
{
#ifdef MOZ_B2G_RIL
// Add an extra ref for IPDL. Will be released in
// ContentChild::DeallocPMobileConnectionChild().
static_cast<MobileConnectionChild*>(aActor)->AddRef();
return PContentChild::SendPMobileConnectionConstructor(aActor, aClientId);
#else
MOZ_CRASH("No support for mobileconnection on this platform!");;
#endif
}
PMobileConnectionChild*
ContentChild::AllocPMobileConnectionChild(const uint32_t& aClientId)
{
#ifdef MOZ_B2G_RIL
NS_NOTREACHED("No one should be allocating PMobileConnectionChild actors");
return nullptr;
#else
MOZ_CRASH("No support for mobileconnection on this platform!");;
#endif
}
bool
ContentChild::DeallocPMobileConnectionChild(PMobileConnectionChild* aActor)
{
#ifdef MOZ_B2G_RIL
// MobileConnectionChild is refcounted, must not be freed manually.
static_cast<MobileConnectionChild*>(aActor)->Release();
return true;
#else
MOZ_CRASH("No support for mobileconnection on this platform!");
#endif
}
PNeckoChild*
ContentChild::AllocPNeckoChild()
{
return new NeckoChild();
}
bool
ContentChild::DeallocPNeckoChild(PNeckoChild* necko)
{
delete necko;
return true;
}
PPrintingChild*
ContentChild::AllocPPrintingChild()
{
// The ContentParent should never attempt to allocate the
// nsPrintingPromptServiceProxy, which implements PPrintingChild. Instead,
// the nsPrintingPromptServiceProxy service is requested and instantiated
// via XPCOM, and the constructor of nsPrintingPromptServiceProxy sets up
// the IPC connection.
NS_NOTREACHED("Should never get here!");
return nullptr;
}
bool
ContentChild::DeallocPPrintingChild(PPrintingChild* printing)
{
return true;
}
PScreenManagerChild*
ContentChild::AllocPScreenManagerChild(uint32_t* aNumberOfScreens,
float* aSystemDefaultScale,
bool* aSuccess)
{
// The ContentParent should never attempt to allocate the
// nsScreenManagerProxy. Instead, the nsScreenManagerProxy
// service is requested and instantiated via XPCOM, and the
// constructor of nsScreenManagerProxy sets up the IPC connection.
NS_NOTREACHED("Should never get here!");
return nullptr;
}
bool
ContentChild::DeallocPScreenManagerChild(PScreenManagerChild* aService)
{
// nsScreenManagerProxy is AddRef'd in its constructor.
nsScreenManagerProxy *child = static_cast<nsScreenManagerProxy*>(aService);
child->Release();
return true;
}
PExternalHelperAppChild*
ContentChild::AllocPExternalHelperAppChild(const OptionalURIParams& uri,
const nsCString& aMimeContentType,
const nsCString& aContentDisposition,
const uint32_t& aContentDispositionHint,
const nsString& aContentDispositionFilename,
const bool& aForceSave,
const int64_t& aContentLength,
const OptionalURIParams& aReferrer,
PBrowserChild* aBrowser)
{
ExternalHelperAppChild *child = new ExternalHelperAppChild();
child->AddRef();
return child;
}
bool
ContentChild::DeallocPExternalHelperAppChild(PExternalHelperAppChild* aService)
{
ExternalHelperAppChild *child = static_cast<ExternalHelperAppChild*>(aService);
child->Release();
return true;
}
PCellBroadcastChild*
ContentChild::AllocPCellBroadcastChild()
{
MOZ_CRASH("No one should be allocating PCellBroadcastChild actors");
}
PCellBroadcastChild*
ContentChild::SendPCellBroadcastConstructor(PCellBroadcastChild* aActor)
{
aActor = PContentChild::SendPCellBroadcastConstructor(aActor);
if (aActor) {
static_cast<CellBroadcastIPCService*>(aActor)->AddRef();
}
return aActor;
}
bool
ContentChild::DeallocPCellBroadcastChild(PCellBroadcastChild* aActor)
{
static_cast<CellBroadcastIPCService*>(aActor)->Release();
return true;
}
PSmsChild*
ContentChild::AllocPSmsChild()
{
return new SmsChild();
}
bool
ContentChild::DeallocPSmsChild(PSmsChild* aSms)
{
delete aSms;
return true;
}
PTelephonyChild*
ContentChild::AllocPTelephonyChild()
{
MOZ_CRASH("No one should be allocating PTelephonyChild actors");
}
bool
ContentChild::DeallocPTelephonyChild(PTelephonyChild* aActor)
{
delete aActor;
return true;
}
PVoicemailChild*
ContentChild::AllocPVoicemailChild()
{
MOZ_CRASH("No one should be allocating PVoicemailChild actors");
}
PVoicemailChild*
ContentChild::SendPVoicemailConstructor(PVoicemailChild* aActor)
{
aActor = PContentChild::SendPVoicemailConstructor(aActor);
if (aActor) {
static_cast<VoicemailIPCService*>(aActor)->AddRef();
}
return aActor;
}
bool
ContentChild::DeallocPVoicemailChild(PVoicemailChild* aActor)
{
static_cast<VoicemailIPCService*>(aActor)->Release();
return true;
}
PStorageChild*
ContentChild::AllocPStorageChild()
{
NS_NOTREACHED("We should never be manually allocating PStorageChild actors");
return nullptr;
}
bool
ContentChild::DeallocPStorageChild(PStorageChild* aActor)
{
DOMStorageDBChild* child = static_cast<DOMStorageDBChild*>(aActor);
child->ReleaseIPDLReference();
return true;
}
PBluetoothChild*
ContentChild::AllocPBluetoothChild()
{
#ifdef MOZ_B2G_BT
MOZ_CRASH("No one should be allocating PBluetoothChild actors");
#else
MOZ_CRASH("No support for bluetooth on this platform!");
#endif
}
bool
ContentChild::DeallocPBluetoothChild(PBluetoothChild* aActor)
{
#ifdef MOZ_B2G_BT
delete aActor;
return true;
#else
MOZ_CRASH("No support for bluetooth on this platform!");
#endif
}
PFMRadioChild*
ContentChild::AllocPFMRadioChild()
{
#ifdef MOZ_B2G_FM
NS_RUNTIMEABORT("No one should be allocating PFMRadioChild actors");
return nullptr;
#else
NS_RUNTIMEABORT("No support for FMRadio on this platform!");
return nullptr;
#endif
}
bool
ContentChild::DeallocPFMRadioChild(PFMRadioChild* aActor)
{
#ifdef MOZ_B2G_FM
delete aActor;
return true;
#else
NS_RUNTIMEABORT("No support for FMRadio on this platform!");
return false;
#endif
}
PSpeechSynthesisChild*
ContentChild::AllocPSpeechSynthesisChild()
{
#ifdef MOZ_WEBSPEECH
MOZ_CRASH("No one should be allocating PSpeechSynthesisChild actors");
#else
return nullptr;
#endif
}
bool
ContentChild::DeallocPSpeechSynthesisChild(PSpeechSynthesisChild* aActor)
{
#ifdef MOZ_WEBSPEECH
delete aActor;
return true;
#else
return false;
#endif
}
bool
ContentChild::RecvRegisterChrome(InfallibleTArray<ChromePackage>&& packages,
InfallibleTArray<ResourceMapping>&& resources,
InfallibleTArray<OverrideMapping>&& overrides,
const nsCString& locale,
const bool& reset)
{
nsCOMPtr<nsIChromeRegistry> registrySvc = nsChromeRegistry::GetService();
nsChromeRegistryContent* chromeRegistry =
static_cast<nsChromeRegistryContent*>(registrySvc.get());
chromeRegistry->RegisterRemoteChrome(packages, resources, overrides,
locale, reset);
return true;
}
bool
ContentChild::RecvRegisterChromeItem(const ChromeRegistryItem& item)
{
nsCOMPtr<nsIChromeRegistry> registrySvc = nsChromeRegistry::GetService();
nsChromeRegistryContent* chromeRegistry =
static_cast<nsChromeRegistryContent*>(registrySvc.get());
switch (item.type()) {
case ChromeRegistryItem::TChromePackage:
chromeRegistry->RegisterPackage(item.get_ChromePackage());
break;
case ChromeRegistryItem::TOverrideMapping:
chromeRegistry->RegisterOverride(item.get_OverrideMapping());
break;
case ChromeRegistryItem::TResourceMapping:
chromeRegistry->RegisterResource(item.get_ResourceMapping());
break;
default:
MOZ_ASSERT(false, "bad chrome item");
return false;
}
return true;
}
bool
ContentChild::RecvSetOffline(const bool& offline)
{
nsCOMPtr<nsIIOService> io (do_GetIOService());
NS_ASSERTION(io, "IO Service can not be null");
io->SetOffline(offline);
return true;
}
void
ContentChild::ActorDestroy(ActorDestroyReason why)
{
if (AbnormalShutdown == why) {
NS_WARNING("shutting down early because of crash!");
QuickExit();
}
#ifndef DEBUG
// In release builds, there's no point in the content process
// going through the full XPCOM shutdown path, because it doesn't
// keep persistent state.
QuickExit();
#endif
if (sFirstIdleTask) {
sFirstIdleTask->Cancel();
}
mAlertObservers.Clear();
mIdleObservers.Clear();
nsCOMPtr<nsIConsoleService> svc(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (svc) {
svc->UnregisterListener(mConsoleListener);
mConsoleListener->mChild = nullptr;
}
mIsAlive = false;
XRE_ShutdownChildProcess();
}
void
ContentChild::ProcessingError(Result aCode, const char* aReason)
{
switch (aCode) {
case MsgDropped:
NS_WARNING("MsgDropped in ContentChild");
return;
case MsgNotKnown:
case MsgNotAllowed:
case MsgPayloadError:
case MsgProcessingError:
case MsgRouteError:
case MsgValueError:
break;
default:
NS_RUNTIMEABORT("not reached");
}
#if defined(MOZ_CRASHREPORTER) && !defined(MOZ_B2G)
if (ManagedPCrashReporterChild().Length() > 0) {
CrashReporterChild* crashReporter =
static_cast<CrashReporterChild*>(ManagedPCrashReporterChild()[0]);
nsDependentCString reason(aReason);
crashReporter->SendAnnotateCrashReport(
NS_LITERAL_CSTRING("ipc_channel_error"),
reason);
}
#endif
NS_RUNTIMEABORT("Content child abort due to IPC error");
}
void
ContentChild::QuickExit()
{
NS_WARNING("content process _exit()ing");
_exit(0);
}
nsresult
ContentChild::AddRemoteAlertObserver(const nsString& aData,
nsIObserver* aObserver)
{
NS_ASSERTION(aObserver, "Adding a null observer?");
mAlertObservers.AppendElement(new AlertObserver(aObserver, aData));
return NS_OK;
}
bool
ContentChild::RecvSystemMemoryAvailable(const uint64_t& aGetterId,
const uint32_t& aMemoryAvailable)
{
nsRefPtr<Promise> p = dont_AddRef(reinterpret_cast<Promise*>(aGetterId));
if (!aMemoryAvailable) {
p->MaybeReject(NS_ERROR_NOT_AVAILABLE);
return true;
}
p->MaybeResolve((int)aMemoryAvailable);
return true;
}
bool
ContentChild::RecvPreferenceUpdate(const PrefSetting& aPref)
{
Preferences::SetPreference(aPref);
return true;
}
bool
ContentChild::RecvNotifyAlertsObserver(const nsCString& aType, const nsString& aData)
{
for (uint32_t i = 0; i < mAlertObservers.Length();
/*we mutate the array during the loop; ++i iff no mutation*/) {
AlertObserver* observer = mAlertObservers[i];
if (observer->Observes(aData) && observer->Notify(aType)) {
// if aType == alertfinished, this alert is done. we can
// remove the observer.
if (aType.Equals(nsDependentCString("alertfinished"))) {
mAlertObservers.RemoveElementAt(i);
continue;
}
}
++i;
}
return true;
}
bool
ContentChild::RecvNotifyVisited(const URIParams& aURI)
{
nsCOMPtr<nsIURI> newURI = DeserializeURI(aURI);
if (!newURI) {
return false;
}
nsCOMPtr<IHistory> history = services::GetHistoryService();
if (history) {
history->NotifyVisited(newURI);
}
return true;
}
bool
ContentChild::RecvLoadProcessScript(const nsString& aURL)
{
ProcessGlobal* global = ProcessGlobal::Get();
global->LoadScript(aURL);
return true;
}
bool
ContentChild::RecvAsyncMessage(const nsString& aMsg,
const ClonedMessageData& aData,
InfallibleTArray<CpowEntry>&& aCpows,
const IPC::Principal& aPrincipal)
{
nsRefPtr<nsFrameMessageManager> cpm = nsFrameMessageManager::GetChildProcessManager();
if (cpm) {
StructuredCloneData cloneData = ipc::UnpackClonedMessageDataForChild(aData);
CrossProcessCpowHolder cpows(this, aCpows);
cpm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(cpm.get()),
aMsg, false, &cloneData, &cpows, aPrincipal, nullptr);
}
return true;
}
bool
ContentChild::RecvGeolocationUpdate(const GeoPosition& somewhere)
{
nsCOMPtr<nsIGeolocationUpdate> gs = do_GetService("@mozilla.org/geolocation/service;1");
if (!gs) {
return true;
}
nsCOMPtr<nsIDOMGeoPosition> position = somewhere;
gs->Update(position);
return true;
}
bool
ContentChild::RecvGeolocationError(const uint16_t& errorCode)
{
nsCOMPtr<nsIGeolocationUpdate> gs = do_GetService("@mozilla.org/geolocation/service;1");
if (!gs) {
return true;
}
gs->NotifyError(errorCode);
return true;
}
bool
ContentChild::RecvUpdateDictionaryList(InfallibleTArray<nsString>&& aDictionaries)
{
mAvailableDictionaries = aDictionaries;
mozInlineSpellChecker::UpdateCanEnableInlineSpellChecking();
return true;
}
bool
ContentChild::RecvAddPermission(const IPC::Permission& permission)
{
#if MOZ_PERMISSIONS
nsCOMPtr<nsIPermissionManager> permissionManagerIface =
services::GetPermissionManager();
nsPermissionManager* permissionManager =
static_cast<nsPermissionManager*>(permissionManagerIface.get());
MOZ_ASSERT(permissionManager,
"We have no permissionManager in the Content process !");
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), NS_LITERAL_CSTRING("http://") + nsCString(permission.host));
NS_ENSURE_TRUE(uri, true);
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
MOZ_ASSERT(secMan);
nsCOMPtr<nsIPrincipal> principal;
nsresult rv = secMan->GetAppCodebasePrincipal(uri, permission.appId,
permission.isInBrowserElement,
getter_AddRefs(principal));
NS_ENSURE_SUCCESS(rv, true);
// child processes don't care about modification time.
int64_t modificationTime = 0;
permissionManager->AddInternal(principal,
nsCString(permission.type),
permission.capability,
0,
permission.expireType,
permission.expireTime,
modificationTime,
nsPermissionManager::eNotify,
nsPermissionManager::eNoDBOperation);
#endif
return true;
}
bool
ContentChild::RecvScreenSizeChanged(const gfxIntSize& size)
{
#ifdef ANDROID
mScreenSize = size;
#else
NS_RUNTIMEABORT("Message currently only expected on android");
#endif
return true;
}
bool
ContentChild::RecvFlushMemory(const nsString& reason)
{
#ifdef MOZ_NUWA_PROCESS
if (IsNuwaProcess() || ManagedPBrowserChild().Length() == 0) {
// Don't flush memory in the nuwa process: the GC thread could be frozen.
// If there's no PBrowser child, don't flush memory, either. GC writes
// to copy-on-write pages and makes preallocated process take more memory
// before it actually becomes an app.
return true;
}
#endif
nsCOMPtr<nsIObserverService> os =
mozilla::services::GetObserverService();
if (os)
os->NotifyObservers(nullptr, "memory-pressure", reason.get());
return true;
}
bool
ContentChild::RecvActivateA11y()
{
#ifdef ACCESSIBILITY
// Start accessibility in content process if it's running in chrome
// process.
nsCOMPtr<nsIAccessibilityService> accService =
services::GetAccessibilityService();
#endif
return true;
}
bool
ContentChild::RecvGarbageCollect()
{
// Rebroadcast the "child-gc-request" so that workers will GC.
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "child-gc-request", nullptr);
}
nsJSContext::GarbageCollectNow(JS::gcreason::DOM_IPC);
return true;
}
bool
ContentChild::RecvCycleCollect()
{
// Rebroadcast the "child-cc-request" so that workers will CC.
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "child-cc-request", nullptr);
}
nsJSContext::CycleCollectNow();
return true;
}
#ifdef MOZ_NUWA_PROCESS
static void
OnFinishNuwaPreparation ()
{
MakeNuwaProcess();
}
#endif
static void
PreloadSlowThings()
{
// This fetches and creates all the built-in stylesheets.
nsLayoutStylesheetCache::UserContentSheet();
TabChild::PreloadSlowThings();
}
bool
ContentChild::RecvAppInfo(const nsCString& version, const nsCString& buildID,
const nsCString& name, const nsCString& UAName,
const nsCString& ID, const nsCString& vendor)
{
mAppInfo.version.Assign(version);
mAppInfo.buildID.Assign(buildID);
mAppInfo.name.Assign(name);
mAppInfo.UAName.Assign(UAName);
mAppInfo.ID.Assign(ID);
mAppInfo.vendor.Assign(vendor);
if (!Preferences::GetBool("dom.ipc.processPrelaunch.enabled", false)) {
return true;
}
// If we're part of the mozbrowser machinery, go ahead and start
// preloading things. We can only do this for mozbrowser because
// PreloadSlowThings() may set the docshell of the first TabChild
// inactive, and we can only safely restore it to active from
// BrowserElementChild.js.
if ((mIsForApp || mIsForBrowser)
#ifdef MOZ_NUWA_PROCESS
&& IsNuwaProcess()
#endif
) {
PreloadSlowThings();
#ifndef MOZ_NUWA_PROCESS
PostForkPreload();
#endif
}
#ifdef MOZ_NUWA_PROCESS
// Some modules are initialized in preloading. We need to wait until the
// tasks they dispatched to chrome process are done.
if (IsNuwaProcess()) {
SendNuwaWaitForFreeze();
}
#endif
return true;
}
bool
ContentChild::RecvNuwaFreeze()
{
#ifdef MOZ_NUWA_PROCESS
if (IsNuwaProcess()) {
ContentChild::GetSingleton()->RecvGarbageCollect();
MessageLoop::current()->PostTask(
FROM_HERE, NewRunnableFunction(OnFinishNuwaPreparation));
}
#endif
return true;
}
bool
ContentChild::RecvLastPrivateDocShellDestroyed()
{
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
obs->NotifyObservers(nullptr, "last-pb-context-exited", nullptr);
return true;
}
bool
ContentChild::RecvVolumes(nsTArray<VolumeInfo>&& aVolumes)
{
#ifdef MOZ_WIDGET_GONK
nsRefPtr<nsVolumeService> vs = nsVolumeService::GetSingleton();
if (vs) {
vs->RecvVolumesFromParent(aVolumes);
}
#endif
return true;
}
bool
ContentChild::RecvFilePathUpdate(const nsString& aStorageType,
const nsString& aStorageName,
const nsString& aPath,
const nsCString& aReason)
{
nsRefPtr<DeviceStorageFile> dsf = new DeviceStorageFile(aStorageType, aStorageName, aPath);
nsString reason;
CopyASCIItoUTF16(aReason, reason);
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
obs->NotifyObservers(dsf, "file-watcher-update", reason.get());
return true;
}
bool
ContentChild::RecvFileSystemUpdate(const nsString& aFsName,
const nsString& aVolumeName,
const int32_t& aState,
const int32_t& aMountGeneration,
const bool& aIsMediaPresent,
const bool& aIsSharing,
const bool& aIsFormatting,
const bool& aIsFake,
const bool& aIsUnmounting,
const bool& aIsRemovable,
const bool& aIsHotSwappable)
{
#ifdef MOZ_WIDGET_GONK
nsRefPtr<nsVolume> volume = new nsVolume(aFsName, aVolumeName, aState,
aMountGeneration, aIsMediaPresent,
aIsSharing, aIsFormatting, aIsFake,
aIsUnmounting, aIsRemovable, aIsHotSwappable);
nsRefPtr<nsVolumeService> vs = nsVolumeService::GetSingleton();
if (vs) {
vs->UpdateVolume(volume);
}
#else
// Remove warnings about unused arguments
unused << aFsName;
unused << aVolumeName;
unused << aState;
unused << aMountGeneration;
unused << aIsMediaPresent;
unused << aIsSharing;
unused << aIsFormatting;
unused << aIsFake;
unused << aIsUnmounting;
unused << aIsRemovable;
unused << aIsHotSwappable;
#endif
return true;
}
bool
ContentChild::RecvNotifyProcessPriorityChanged(
const hal::ProcessPriority& aPriority)
{
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
NS_ENSURE_TRUE(os, true);
nsRefPtr<nsHashPropertyBag> props = new nsHashPropertyBag();
props->SetPropertyAsInt32(NS_LITERAL_STRING("priority"),
static_cast<int32_t>(aPriority));
os->NotifyObservers(static_cast<nsIPropertyBag2*>(props),
"ipc:process-priority-changed", nullptr);
return true;
}
bool
ContentChild::RecvMinimizeMemoryUsage()
{
#ifdef MOZ_NUWA_PROCESS
if (IsNuwaProcess()) {
// Don't minimize memory in the nuwa process: it will perform GC, but the
// GC thread could be frozen.
return true;
}
#endif
nsCOMPtr<nsIMemoryReporterManager> mgr =
do_GetService("@mozilla.org/memory-reporter-manager;1");
NS_ENSURE_TRUE(mgr, true);
mgr->MinimizeMemoryUsage(/* callback = */ nullptr);
return true;
}
bool
ContentChild::RecvNotifyPhoneStateChange(const nsString& aState)
{
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (os) {
os->NotifyObservers(nullptr, "phone-state-changed", aState.get());
}
return true;
}
void
ContentChild::AddIdleObserver(nsIObserver* aObserver, uint32_t aIdleTimeInS)
{
MOZ_ASSERT(aObserver, "null idle observer");
// Make sure aObserver isn't released while we wait for the parent
aObserver->AddRef();
SendAddIdleObserver(reinterpret_cast<uint64_t>(aObserver), aIdleTimeInS);
mIdleObservers.PutEntry(aObserver);
}
void
ContentChild::RemoveIdleObserver(nsIObserver* aObserver, uint32_t aIdleTimeInS)
{
MOZ_ASSERT(aObserver, "null idle observer");
SendRemoveIdleObserver(reinterpret_cast<uint64_t>(aObserver), aIdleTimeInS);
aObserver->Release();
mIdleObservers.RemoveEntry(aObserver);
}
bool
ContentChild::RecvNotifyIdleObserver(const uint64_t& aObserver,
const nsCString& aTopic,
const nsString& aTimeStr)
{
nsIObserver* observer = reinterpret_cast<nsIObserver*>(aObserver);
if (mIdleObservers.Contains(observer)) {
observer->Observe(nullptr, aTopic.get(), aTimeStr.get());
} else {
NS_WARNING("Received notification for an idle observer that was removed.");
}
return true;
}
bool
ContentChild::RecvLoadAndRegisterSheet(const URIParams& aURI, const uint32_t& aType)
{
nsCOMPtr<nsIURI> uri = DeserializeURI(aURI);
if (!uri) {
return true;
}
nsStyleSheetService *sheetService = nsStyleSheetService::GetInstance();
if (sheetService) {
sheetService->LoadAndRegisterSheet(uri, aType);
}
return true;
}
bool
ContentChild::RecvUnregisterSheet(const URIParams& aURI, const uint32_t& aType)
{
nsCOMPtr<nsIURI> uri = DeserializeURI(aURI);
if (!uri) {
return true;
}
nsStyleSheetService *sheetService = nsStyleSheetService::GetInstance();
if (sheetService) {
sheetService->UnregisterSheet(uri, aType);
}
return true;
}
POfflineCacheUpdateChild*
ContentChild::AllocPOfflineCacheUpdateChild(const URIParams& manifestURI,
const URIParams& documentURI,
const bool& stickDocument,
const TabId& aTabId)
{
NS_RUNTIMEABORT("unused");
return nullptr;
}
bool
ContentChild::DeallocPOfflineCacheUpdateChild(POfflineCacheUpdateChild* actor)
{
OfflineCacheUpdateChild* offlineCacheUpdate =
static_cast<OfflineCacheUpdateChild*>(actor);
NS_RELEASE(offlineCacheUpdate);
return true;
}
#ifdef MOZ_NUWA_PROCESS
class CallNuwaSpawn : public nsRunnable
{
public:
NS_IMETHOD Run()
{
NuwaSpawn();
if (IsNuwaProcess()) {
return NS_OK;
}
// In the new process.
ContentChild* child = ContentChild::GetSingleton();
child->SetProcessName(NS_LITERAL_STRING("(Preallocated app)"), false);
mozilla::ipc::Transport* transport = child->GetTransport();
int fd = transport->GetFileDescriptor();
transport->ResetFileDescriptor(fd);
IToplevelProtocol* toplevel = child->GetFirstOpenedActors();
while (toplevel != nullptr) {
transport = toplevel->GetTransport();
fd = transport->GetFileDescriptor();
transport->ResetFileDescriptor(fd);
toplevel = toplevel->getNext();
}
// Perform other after-fork initializations.
InitOnContentProcessCreated();
return NS_OK;
}
};
static void
DoNuwaFork()
{
NuwaSpawnPrepare(); // NuwaSpawn will be blocked.
{
nsCOMPtr<nsIRunnable> callSpawn(new CallNuwaSpawn());
NS_DispatchToMainThread(callSpawn);
}
// IOThread should be blocked here for waiting NuwaSpawn().
NuwaSpawnWait(); // Now! NuwaSpawn can go.
// Here, we can make sure the spawning was finished.
}
/**
* This function should keep IO thread in a stable state and freeze it
* until the spawning is finished.
*/
static void
RunNuwaFork()
{
if (NuwaCheckpointCurrentThread()) {
DoNuwaFork();
}
}
class NuwaForkCaller: public nsRunnable
{
public:
NS_IMETHODIMP
Run() {
// We want to ensure that the PBackground actor gets cloned in the Nuwa
// process before we freeze. Also, we have to do this to avoid deadlock.
// Protocols that are "opened" (e.g. PBackground, PCompositor) block the
// main thread to wait for the IPC thread during the open operation.
// NuwaSpawnWait() blocks the IPC thread to wait for the main thread when
// the Nuwa process is forked. Unless we ensure that the two cannot happen
// at the same time then we risk deadlock. Spinning the event loop here
// guarantees the ordering is safe for PBackground.
if (!BackgroundChild::GetForCurrentThread()) {
// Dispatch ourself again.
NS_DispatchToMainThread(this, NS_DISPATCH_NORMAL);
} else {
MessageLoop* ioloop = XRE_GetIOMessageLoop();
ioloop->PostTask(FROM_HERE, NewRunnableFunction(RunNuwaFork));
}
return NS_OK;
}
private:
virtual
~NuwaForkCaller()
{
}
};
#endif
bool
ContentChild::RecvNuwaFork()
{
#ifdef MOZ_NUWA_PROCESS
if (sNuwaForking) { // No reentry.
return true;
}
sNuwaForking = true;
nsRefPtr<NuwaForkCaller> runnable = new NuwaForkCaller();
NS_DispatchToMainThread(runnable, NS_DISPATCH_NORMAL);
return true;
#else
return false; // Makes the underlying IPC channel abort.
#endif
}
bool
ContentChild::RecvOnAppThemeChanged()
{
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (os) {
os->NotifyObservers(nullptr, "app-theme-changed", nullptr);
}
return true;
}
bool
ContentChild::RecvStartProfiler(const uint32_t& aEntries,
const double& aInterval,
nsTArray<nsCString>&& aFeatures,
nsTArray<nsCString>&& aThreadNameFilters)
{
nsTArray<const char*> featureArray;
for (size_t i = 0; i < aFeatures.Length(); ++i) {
featureArray.AppendElement(aFeatures[i].get());
}
nsTArray<const char*> threadNameFilterArray;
for (size_t i = 0; i < aThreadNameFilters.Length(); ++i) {
threadNameFilterArray.AppendElement(aThreadNameFilters[i].get());
}
profiler_start(aEntries, aInterval, featureArray.Elements(), featureArray.Length(),
threadNameFilterArray.Elements(), threadNameFilterArray.Length());
return true;
}
bool
ContentChild::RecvStopProfiler()
{
profiler_stop();
return true;
}
bool
ContentChild::RecvGetProfile(nsCString* aProfile)
{
char* profile = profiler_get_profile();
if (profile) {
*aProfile = nsCString(profile, strlen(profile));
free(profile);
} else {
*aProfile = EmptyCString();
}
return true;
}
bool
ContentChild::RecvLoadPluginResult(const uint32_t& aPluginId, const bool& aResult)
{
nsresult rv;
bool finalResult = aResult &&
SendConnectPluginBridge(aPluginId, &rv) &&
NS_SUCCEEDED(rv);
plugins::PluginModuleContentParent::OnLoadPluginResult(aPluginId,
finalResult);
return true;
}
bool
ContentChild::RecvAssociatePluginId(const uint32_t& aPluginId,
const base::ProcessId& aProcessId)
{
plugins::PluginModuleContentParent::AssociatePluginId(aPluginId, aProcessId);
return true;
}
bool
ContentChild::RecvShutdown()
{
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (os) {
os->NotifyObservers(this, "content-child-shutdown", nullptr);
}
GetIPCChannel()->SetAbortOnError(false);
// Ignore errors here. If this fails, the parent will kill us after a
// timeout.
unused << SendFinishShutdown();
return true;
}
PBrowserOrId
ContentChild::GetBrowserOrId(TabChild* aTabChild)
{
if (!aTabChild ||
this == aTabChild->Manager()) {
return PBrowserOrId(aTabChild);
}
else {
return PBrowserOrId(aTabChild->GetTabId());
}
}
// This code goes here rather than nsGlobalWindow.cpp because nsGlobalWindow.cpp
// can't include ContentChild.h since it includes windows.h.
static uint64_t gNextWindowID = 0;
// We use only 53 bits for the window ID so that it can be converted to and from
// a JS value without loss of precision. The upper bits of the window ID hold the
// process ID. The lower bits identify the window.
static const uint64_t kWindowIDTotalBits = 53;
static const uint64_t kWindowIDProcessBits = 22;
static const uint64_t kWindowIDWindowBits = kWindowIDTotalBits - kWindowIDProcessBits;
// Try to return a window ID that is unique across processes and that will never
// be recycled.
uint64_t
NextWindowID()
{
uint64_t processID = 0;
if (XRE_GetProcessType() == GeckoProcessType_Content) {
ContentChild* cc = ContentChild::GetSingleton();
processID = cc->GetID();
}
MOZ_RELEASE_ASSERT(processID < (uint64_t(1) << kWindowIDProcessBits));
uint64_t processBits = processID & ((uint64_t(1) << kWindowIDProcessBits) - 1);
// Make sure no actual window ends up with mWindowID == 0.
uint64_t windowID = ++gNextWindowID;
MOZ_RELEASE_ASSERT(windowID < (uint64_t(1) << kWindowIDWindowBits));
uint64_t windowBits = windowID & ((uint64_t(1) << kWindowIDWindowBits) - 1);
return (processBits << kWindowIDWindowBits) | windowBits;
}
} // namespace dom
} // namespace mozilla
extern "C" {
#if defined(MOZ_NUWA_PROCESS)
NS_EXPORT void
GetProtoFdInfos(NuwaProtoFdInfo* aInfoList,
size_t aInfoListSize,
size_t* aInfoSize)
{
size_t i = 0;
mozilla::dom::ContentChild* content =
mozilla::dom::ContentChild::GetSingleton();
aInfoList[i].protoId = content->GetProtocolId();
aInfoList[i].originFd =
content->GetTransport()->GetFileDescriptor();
i++;
for (IToplevelProtocol* actor = content->GetFirstOpenedActors();
actor != nullptr;
actor = actor->getNext()) {
if (i >= aInfoListSize) {
NS_RUNTIMEABORT("Too many top level protocols!");
}
aInfoList[i].protoId = actor->GetProtocolId();
aInfoList[i].originFd =
actor->GetTransport()->GetFileDescriptor();
i++;
}
if (i > NUWA_TOPLEVEL_MAX) {
NS_RUNTIMEABORT("Too many top level protocols!");
}
*aInfoSize = i;
}
class RunAddNewIPCProcess : public nsRunnable
{
public:
RunAddNewIPCProcess(pid_t aPid,
nsTArray<mozilla::ipc::ProtocolFdMapping>& aMaps)
: mPid(aPid)
{
mMaps.SwapElements(aMaps);
}
NS_IMETHOD Run()
{
mozilla::dom::ContentChild::GetSingleton()->
SendAddNewProcess(mPid, mMaps);
MOZ_ASSERT(sNuwaForking);
sNuwaForking = false;
return NS_OK;
}
private:
pid_t mPid;
nsTArray<mozilla::ipc::ProtocolFdMapping> mMaps;
};
/**
* AddNewIPCProcess() is called by Nuwa process to tell the parent
* process that a new process is created.
*
* In the newly created process, ResetContentChildTransport() is called to
* reset fd for the IPC Channel and the session.
*/
NS_EXPORT void
AddNewIPCProcess(pid_t aPid, NuwaProtoFdInfo* aInfoList, size_t aInfoListSize)
{
nsTArray<mozilla::ipc::ProtocolFdMapping> maps;
for (size_t i = 0; i < aInfoListSize; i++) {
int _fd = aInfoList[i].newFds[NUWA_NEWFD_PARENT];
mozilla::ipc::FileDescriptor fd(_fd);
mozilla::ipc::ProtocolFdMapping map(aInfoList[i].protoId, fd);
maps.AppendElement(map);
}
nsRefPtr<RunAddNewIPCProcess> runner = new RunAddNewIPCProcess(aPid, maps);
NS_DispatchToMainThread(runner);
}
NS_EXPORT void
OnNuwaProcessReady()
{
mozilla::dom::ContentChild* content =
mozilla::dom::ContentChild::GetSingleton();
content->SendNuwaReady();
}
NS_EXPORT void
AfterNuwaFork()
{
SetCurrentProcessPrivileges(base::PRIVILEGES_DEFAULT);
}
#endif // MOZ_NUWA_PROCESS
}
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