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gecko-dev/ipc/glue/GeckoChildProcessHost.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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/. */
#include "GeckoChildProcessHost.h"
#include "base/command_line.h"
#include "base/string_util.h"
#include "base/task.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/process_watcher.h"
#ifdef MOZ_WIDGET_COCOA
# include "chrome/common/mach_ipc_mac.h"
# include "base/rand_util.h"
# include "nsILocalFileMac.h"
# include "SharedMemoryBasic.h"
#endif
#include "MainThreadUtils.h"
#include "mozilla/Sprintf.h"
#include "prenv.h"
#include "nsXPCOMPrivate.h"
#if defined(MOZ_SANDBOX)
# include "mozilla/SandboxSettings.h"
# include "nsAppDirectoryServiceDefs.h"
#endif
#include "nsExceptionHandler.h"
#include "nsDirectoryServiceDefs.h"
#include "nsIFile.h"
#include "nsPrintfCString.h"
#include "nsIObserverService.h"
#include "mozilla/ipc/BrowserProcessSubThread.h"
#include "mozilla/ipc/EnvironmentMap.h"
#include "mozilla/LinkedList.h"
#include "mozilla/Maybe.h"
#include "mozilla/Omnijar.h"
#include "mozilla/RecordReplay.h"
#include "mozilla/RDDProcessHost.h"
#include "mozilla/Scoped.h"
#include "mozilla/Services.h"
#include "mozilla/SharedThreadPool.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/TaskQueue.h"
#include "mozilla/Telemetry.h"
#include "ProtocolUtils.h"
#include <sys/stat.h>
#ifdef XP_WIN
# include "nsIWinTaskbar.h"
# include <stdlib.h>
# define NS_TASKBAR_CONTRACTID "@mozilla.org/windows-taskbar;1"
# if defined(MOZ_SANDBOX)
# include "mozilla/Preferences.h"
# include "mozilla/sandboxing/sandboxLogging.h"
# include "WinUtils.h"
# if defined(_ARM64_)
# include "mozilla/remoteSandboxBroker.h"
# endif
# endif
#endif
#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
# include "mozilla/SandboxLaunch.h"
#endif
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
# include "GMPProcessParent.h"
# include "nsMacUtilsImpl.h"
#endif
#include "nsTArray.h"
#include "nsClassHashtable.h"
#include "nsHashKeys.h"
#include "nsNativeCharsetUtils.h"
#include "nscore.h" // for NS_FREE_PERMANENT_DATA
#include "private/pprio.h"
using mozilla::MonitorAutoLock;
using mozilla::Preferences;
using mozilla::StaticMutexAutoLock;
namespace mozilla {
MOZ_TYPE_SPECIFIC_SCOPED_POINTER_TEMPLATE(ScopedPRFileDesc, PRFileDesc,
PR_Close)
}
using mozilla::ScopedPRFileDesc;
#ifdef MOZ_WIDGET_ANDROID
# include "AndroidBridge.h"
# include "GeneratedJNIWrappers.h"
# include "mozilla/jni/Refs.h"
# include "mozilla/jni/Utils.h"
#endif
static bool ShouldHaveDirectoryService() {
return GeckoProcessType_Default == XRE_GetProcessType();
}
namespace mozilla {
namespace ipc {
static Atomic<int32_t> gChildCounter;
static inline nsISerialEventTarget* IOThread() {
return XRE_GetIOMessageLoop()->SerialEventTarget();
}
class BaseProcessLauncher {
public:
BaseProcessLauncher(GeckoChildProcessHost* aHost,
std::vector<std::string>&& aExtraOpts)
: mProcessType(aHost->mProcessType),
mLaunchOptions(std::move(aHost->mLaunchOptions)),
mExtraOpts(std::move(aExtraOpts)),
#ifdef XP_WIN
mGroupId(aHost->mGroupId),
#endif
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
mAllowedFilesRead(aHost->mAllowedFilesRead),
mSandboxLevel(aHost->mSandboxLevel),
mIsFileContent(aHost->mIsFileContent),
mEnableSandboxLogging(aHost->mEnableSandboxLogging),
#endif
mTmpDirName(aHost->mTmpDirName),
mChildId(++gChildCounter) {
SprintfLiteral(mPidString, "%d", base::GetCurrentProcId());
// Compute the serial event target we'll use for launching.
if (mozilla::recordreplay::IsMiddleman()) {
// During Web Replay, the middleman process launches the actual content
// processes, and doesn't initialize enough of XPCOM to use thread pools.
mLaunchThread = IOThread();
} else {
nsCOMPtr<nsIEventTarget> threadOrPool = GetIPCLauncher();
mLaunchThread = new TaskQueue(threadOrPool.forget());
}
}
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(BaseProcessLauncher);
RefPtr<ProcessLaunchPromise> Launch(GeckoChildProcessHost*);
protected:
virtual ~BaseProcessLauncher() = default;
RefPtr<ProcessLaunchPromise> PerformAsyncLaunch();
RefPtr<ProcessLaunchPromise> FinishLaunch();
// Overrideable hooks. If superclass behavior is invoked, it's always at the
// top of the override.
virtual bool DoSetup();
virtual RefPtr<ProcessHandlePromise> DoLaunch() = 0;
virtual bool DoFinishLaunch() { return true; };
void MapChildLogging();
static BinPathType GetPathToBinary(FilePath&, GeckoProcessType);
void GetChildLogName(const char* origLogName, nsACString& buffer);
const char* ChildProcessType() {
return XRE_ChildProcessTypeToString(mProcessType);
}
nsCOMPtr<nsIEventTarget> GetIPCLauncher();
nsCOMPtr<nsISerialEventTarget> mLaunchThread;
GeckoProcessType mProcessType;
UniquePtr<base::LaunchOptions> mLaunchOptions;
std::vector<std::string> mExtraOpts;
#ifdef XP_WIN
nsString mGroupId;
#endif
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
std::vector<std::wstring> mAllowedFilesRead;
int32_t mSandboxLevel;
bool mIsFileContent;
bool mEnableSandboxLogging;
#endif
nsCString mTmpDirName;
LaunchResults mResults = LaunchResults();
int32_t mChildId;
TimeStamp mStartTimeStamp = TimeStamp::Now();
char mPidString[32];
// Set during launch.
IPC::Channel* mChannel = nullptr;
std::wstring mChannelId;
ScopedPRFileDesc mCrashAnnotationReadPipe;
ScopedPRFileDesc mCrashAnnotationWritePipe;
};
#ifdef XP_WIN
class WindowsProcessLauncher : public BaseProcessLauncher {
public:
WindowsProcessLauncher(GeckoChildProcessHost* aHost,
std::vector<std::string>&& aExtraOpts)
: BaseProcessLauncher(aHost, std::move(aExtraOpts)) {}
protected:
virtual bool DoSetup() override;
virtual RefPtr<ProcessHandlePromise> DoLaunch() override;
virtual bool DoFinishLaunch() override;
mozilla::Maybe<CommandLine> mCmdLine;
bool mUseSandbox = false;
};
typedef WindowsProcessLauncher ProcessLauncher;
#endif // XP_WIN
#ifdef OS_POSIX
class PosixProcessLauncher : public BaseProcessLauncher {
public:
PosixProcessLauncher(GeckoChildProcessHost* aHost,
std::vector<std::string>&& aExtraOpts)
: BaseProcessLauncher(aHost, std::move(aExtraOpts)) {}
protected:
virtual bool DoSetup() override;
virtual RefPtr<ProcessHandlePromise> DoLaunch() override;
virtual bool DoFinishLaunch() override;
std::vector<std::string> mChildArgv;
};
# if defined(XP_MACOSX)
class MacProcessLauncher : public PosixProcessLauncher {
public:
MacProcessLauncher(GeckoChildProcessHost* aHost,
std::vector<std::string>&& aExtraOpts)
: PosixProcessLauncher(aHost, std::move(aExtraOpts)),
// Put a random number into the channel name, so that
// a compromised renderer can't pretend being the child
// that's forked off.
mMachConnectionName(
StringPrintf("org.mozilla.machname.%d",
base::RandInt(0, std::numeric_limits<int>::max()))),
mParentRecvPort(mMachConnectionName.c_str()) {}
protected:
virtual bool DoFinishLaunch() override;
std::string mMachConnectionName;
// We add a mach port to the command line so the child can communicate its
// 'task_t' back to the parent.
ReceivePort mParentRecvPort;
friend class PosixProcessLauncher;
};
typedef MacProcessLauncher ProcessLauncher;
# elif defined(MOZ_WIDGET_ANDROID)
class AndroidProcessLauncher : public PosixProcessLauncher {
public:
AndroidProcessLauncher(GeckoChildProcessHost* aHost,
std::vector<std::string>&& aExtraOpts)
: PosixProcessLauncher(aHost, std::move(aExtraOpts)) {}
protected:
virtual RefPtr<ProcessHandlePromise> DoLaunch() override;
void LaunchAndroidService(
const char* type, const std::vector<std::string>& argv,
const base::file_handle_mapping_vector& fds_to_remap,
base::ProcessHandle* process_handle);
};
typedef AndroidProcessLauncher ProcessLauncher;
// NB: Technically Android is linux (i.e. XP_LINUX is defined), but we want
// orthogonal IPC machinery there. Conversely, there are tier-3 non-Linux
// platforms (BSD and Solaris) where we want the "linux" IPC machinery. So
// we use MOZ_WIDGET_* to choose the platform backend.
# elif defined(MOZ_WIDGET_GTK)
class LinuxProcessLauncher : public PosixProcessLauncher {
public:
LinuxProcessLauncher(GeckoChildProcessHost* aHost,
std::vector<std::string>&& aExtraOpts)
: PosixProcessLauncher(aHost, std::move(aExtraOpts)) {}
protected:
virtual bool DoSetup() override;
};
typedef LinuxProcessLauncher ProcessLauncher;
# elif
# error "Unknown platform"
# endif
#endif // OS_POSIX
using base::ProcessHandle;
using mozilla::ipc::BaseProcessLauncher;
using mozilla::ipc::ProcessLauncher;
mozilla::StaticAutoPtr<mozilla::LinkedList<GeckoChildProcessHost>>
GeckoChildProcessHost::sGeckoChildProcessHosts;
mozilla::StaticMutex GeckoChildProcessHost::sMutex;
GeckoChildProcessHost::GeckoChildProcessHost(GeckoProcessType aProcessType,
bool aIsFileContent)
: mProcessType(aProcessType),
mIsFileContent(aIsFileContent),
mMonitor("mozilla.ipc.GeckChildProcessHost.mMonitor"),
mLaunchOptions(MakeUnique<base::LaunchOptions>()),
mProcessState(CREATING_CHANNEL),
#ifdef XP_WIN
mGroupId(u"-"),
#endif
#if defined(MOZ_SANDBOX) && defined(XP_WIN)
mEnableSandboxLogging(false),
mSandboxLevel(0),
#endif
mChildProcessHandle(0),
#if defined(MOZ_WIDGET_COCOA)
mChildTask(MACH_PORT_NULL),
#endif
mDestroying(false) {
MOZ_COUNT_CTOR(GeckoChildProcessHost);
StaticMutexAutoLock lock(sMutex);
if (!sGeckoChildProcessHosts) {
sGeckoChildProcessHosts = new mozilla::LinkedList<GeckoChildProcessHost>();
}
sGeckoChildProcessHosts->insertBack(this);
}
GeckoChildProcessHost::~GeckoChildProcessHost()
{
AssertIOThread();
MOZ_RELEASE_ASSERT(mDestroying);
MOZ_COUNT_DTOR(GeckoChildProcessHost);
if (mChildProcessHandle != 0) {
#if defined(MOZ_WIDGET_COCOA)
SharedMemoryBasic::CleanupForPid(mChildProcessHandle);
#endif
ProcessWatcher::EnsureProcessTerminated(
mChildProcessHandle
#ifdef NS_FREE_PERMANENT_DATA
// If we're doing leak logging, shutdown can be slow.
,
false // don't "force"
#endif
);
}
#if defined(MOZ_WIDGET_COCOA)
if (mChildTask != MACH_PORT_NULL)
mach_port_deallocate(mach_task_self(), mChildTask);
#endif
if (mChildProcessHandle != 0) {
#if defined(XP_WIN)
CrashReporter::DeregisterChildCrashAnnotationFileDescriptor(
base::GetProcId(mChildProcessHandle));
#else
CrashReporter::DeregisterChildCrashAnnotationFileDescriptor(
mChildProcessHandle);
#endif
}
#if defined(MOZ_SANDBOX) && defined(XP_WIN)
if (mSandboxBroker) {
mSandboxBroker->Shutdown();
mSandboxBroker = nullptr;
}
#endif
}
void GeckoChildProcessHost::RemoveFromProcessList() {
StaticMutexAutoLock lock(sMutex);
if (!sGeckoChildProcessHosts) {
return;
}
LinkedListElement<GeckoChildProcessHost>::removeFrom(
*sGeckoChildProcessHosts);
}
void GeckoChildProcessHost::Destroy() {
MOZ_RELEASE_ASSERT(!mDestroying);
// We can remove from the list before it's really destroyed
RemoveFromProcessList();
RefPtr<ProcessHandlePromise> whenReady = mHandlePromise;
if (!whenReady) {
// AsyncLaunch not called yet, so dispatch immediately.
whenReady = ProcessHandlePromise::CreateAndReject(LaunchError{}, __func__);
}
using Value = ProcessHandlePromise::ResolveOrRejectValue;
mDestroying = true;
whenReady->Then(XRE_GetIOMessageLoop()->SerialEventTarget(), __func__,
[this](const Value&) { delete this; });
}
// static
mozilla::BinPathType BaseProcessLauncher::GetPathToBinary(
FilePath& exePath, GeckoProcessType processType) {
BinPathType pathType = XRE_GetChildProcBinPathType(processType);
if (pathType == BinPathType::Self) {
#if defined(OS_WIN)
wchar_t exePathBuf[MAXPATHLEN];
if (!::GetModuleFileNameW(nullptr, exePathBuf, MAXPATHLEN)) {
MOZ_CRASH("GetModuleFileNameW failed (FIXME)");
}
# if defined(MOZ_SANDBOX)
// We need to start the child process using the real path, so that the
// sandbox policy rules will match for DLLs loaded from the bin dir after
// we have lowered the sandbox.
std::wstring exePathStr = exePathBuf;
if (widget::WinUtils::ResolveJunctionPointsAndSymLinks(exePathStr)) {
exePath = FilePath::FromWStringHack(exePathStr);
} else
# endif
{
exePath = FilePath::FromWStringHack(exePathBuf);
}
#elif defined(OS_POSIX)
exePath = FilePath(CommandLine::ForCurrentProcess()->argv()[0]);
#else
# error Sorry; target OS not supported yet.
#endif
return pathType;
}
if (ShouldHaveDirectoryService()) {
MOZ_ASSERT(gGREBinPath);
#ifdef OS_WIN
exePath = FilePath(char16ptr_t(gGREBinPath));
#elif MOZ_WIDGET_COCOA
nsCOMPtr<nsIFile> childProcPath;
NS_NewLocalFile(nsDependentString(gGREBinPath), false,
getter_AddRefs(childProcPath));
// We need to use an App Bundle on OS X so that we can hide
// the dock icon. See Bug 557225.
childProcPath->AppendNative(NS_LITERAL_CSTRING("plugin-container.app"));
childProcPath->AppendNative(NS_LITERAL_CSTRING("Contents"));
childProcPath->AppendNative(NS_LITERAL_CSTRING("MacOS"));
nsCString tempCPath;
childProcPath->GetNativePath(tempCPath);
exePath = FilePath(tempCPath.get());
#else
nsCString path;
NS_CopyUnicodeToNative(nsDependentString(gGREBinPath), path);
exePath = FilePath(path.get());
#endif
}
if (exePath.empty()) {
#ifdef OS_WIN
exePath =
FilePath::FromWStringHack(CommandLine::ForCurrentProcess()->program());
#else
exePath = FilePath(CommandLine::ForCurrentProcess()->argv()[0]);
#endif
exePath = exePath.DirName();
}
exePath = exePath.AppendASCII(MOZ_CHILD_PROCESS_NAME);
return pathType;
}
#ifdef MOZ_WIDGET_COCOA
class AutoCFTypeObject {
public:
explicit AutoCFTypeObject(CFTypeRef object) { mObject = object; }
~AutoCFTypeObject() { ::CFRelease(mObject); }
private:
CFTypeRef mObject;
};
#endif
// We start the unique IDs at 1 so that 0 can be used to mean that
// a component has no unique ID assigned to it.
uint32_t GeckoChildProcessHost::sNextUniqueID = 1;
/* static */
uint32_t GeckoChildProcessHost::GetUniqueID() { return sNextUniqueID++; }
void GeckoChildProcessHost::PrepareLaunch() {
if (CrashReporter::GetEnabled()) {
CrashReporter::OOPInit();
}
#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
SandboxLaunchPrepare(mProcessType, mLaunchOptions.get());
#endif
#ifdef XP_WIN
if (mProcessType == GeckoProcessType_Plugin) {
InitWindowsGroupID();
}
# if defined(MOZ_SANDBOX)
// We need to get the pref here as the process is launched off main thread.
if (mProcessType == GeckoProcessType_Content) {
mSandboxLevel = GetEffectiveContentSandboxLevel();
mEnableSandboxLogging =
Preferences::GetBool("security.sandbox.logging.enabled");
// We currently have to whitelist certain paths for tests to work in some
// development configurations.
nsAutoString readPaths;
nsresult rv = Preferences::GetString(
"security.sandbox.content.read_path_whitelist", readPaths);
if (NS_SUCCEEDED(rv)) {
for (const nsAString& readPath : readPaths.Split(',')) {
nsString trimmedPath(readPath);
trimmedPath.Trim(" ", true, true);
std::wstring resolvedPath(trimmedPath.Data());
// Before resolving check if path ends with '\' as this indicates we
// want to give read access to a directory and so it needs a wildcard.
bool addWildcard = (resolvedPath.back() == L'\\');
if (!widget::WinUtils::ResolveJunctionPointsAndSymLinks(resolvedPath)) {
NS_ERROR("Failed to resolve test read policy rule.");
continue;
}
if (addWildcard) {
resolvedPath.append(L"\\*");
}
mAllowedFilesRead.push_back(resolvedPath);
}
}
}
# endif
# if defined(MOZ_SANDBOX)
// For other process types we can't rely on them being launched on main
// thread and they may not have access to prefs in the child process, so allow
// them to turn on logging via an environment variable.
mEnableSandboxLogging =
mEnableSandboxLogging || !!PR_GetEnv("MOZ_SANDBOX_LOGGING");
# endif
#elif defined(XP_LINUX)
# if defined(MOZ_SANDBOX)
// Get and remember the path to the per-content-process tmpdir
if (ShouldHaveDirectoryService()) {
nsCOMPtr<nsIFile> contentTempDir;
nsresult rv = NS_GetSpecialDirectory(NS_APP_CONTENT_PROCESS_TEMP_DIR,
getter_AddRefs(contentTempDir));
if (NS_SUCCEEDED(rv)) {
contentTempDir->GetNativePath(mTmpDirName);
}
}
# endif
#endif
}
#ifdef XP_WIN
void GeckoChildProcessHost::InitWindowsGroupID() {
// 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);
if (taskbarInfo) {
bool isSupported = false;
taskbarInfo->GetAvailable(&isSupported);
nsAutoString appId;
if (isSupported && NS_SUCCEEDED(taskbarInfo->GetDefaultGroupId(appId))) {
MOZ_ASSERT(mGroupId.EqualsLiteral("-"));
mGroupId.Assign(appId);
}
}
}
#endif
bool GeckoChildProcessHost::SyncLaunch(std::vector<std::string> aExtraOpts,
int aTimeoutMs) {
if (!AsyncLaunch(std::move(aExtraOpts))) {
return false;
}
return WaitUntilConnected(aTimeoutMs);
}
bool GeckoChildProcessHost::AsyncLaunch(std::vector<std::string> aExtraOpts) {
PrepareLaunch();
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
if (IsMacSandboxLaunchEnabled() && !AppendMacSandboxParams(aExtraOpts)) {
return false;
}
#endif
RefPtr<BaseProcessLauncher> launcher =
new ProcessLauncher(this, std::move(aExtraOpts));
// Note: Destroy() waits on mHandlePromise to delete |this|. As such, we want
// to be sure that all of our post-launch processing on |this| happens before
// mHandlePromise notifies.
MOZ_ASSERT(mHandlePromise == nullptr);
RefPtr<ProcessHandlePromise::Private> p =
new ProcessHandlePromise::Private(__func__);
mHandlePromise = p;
mozilla::InvokeAsync<GeckoChildProcessHost*>(
IOThread(), launcher.get(), __func__, &BaseProcessLauncher::Launch, this)
->Then(
IOThread(), __func__,
[this, p](const LaunchResults aResults) {
{
if (!OpenPrivilegedHandle(base::GetProcId(aResults.mHandle))
#ifdef XP_WIN
// If we failed in opening the process handle, try harder by
// duplicating one.
&& !::DuplicateHandle(::GetCurrentProcess(), aResults.mHandle,
::GetCurrentProcess(),
&mChildProcessHandle,
PROCESS_DUP_HANDLE | PROCESS_TERMINATE |
PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ | SYNCHRONIZE,
FALSE, 0)
#endif // XP_WIN
) {
MOZ_CRASH("cannot open handle to child process");
}
#ifdef XP_MACOSX
this->mChildTask = aResults.mChildTask;
#endif
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
this->mSandboxBroker = aResults.mSandboxBroker;
#endif
MonitorAutoLock lock(mMonitor);
// The OnChannel{Connected,Error} may have already advanced the
// state.
if (mProcessState < PROCESS_CREATED) {
mProcessState = PROCESS_CREATED;
}
lock.Notify();
}
p->Resolve(aResults.mHandle, __func__);
},
[this, p](const LaunchError aError) {
// WaitUntilConnected might be waiting for us to signal.
// If something failed let's set the error state and notify.
CHROMIUM_LOG(ERROR)
<< "Failed to launch "
<< XRE_ChildProcessTypeToString(mProcessType) << " subprocess";
Telemetry::Accumulate(
Telemetry::SUBPROCESS_LAUNCH_FAILURE,
nsDependentCString(XRE_ChildProcessTypeToString(mProcessType)));
{
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_ERROR;
lock.Notify();
}
p->Reject(aError, __func__);
});
return true;
}
bool GeckoChildProcessHost::WaitUntilConnected(int32_t aTimeoutMs) {
AUTO_PROFILER_LABEL("GeckoChildProcessHost::WaitUntilConnected", OTHER);
// NB: this uses a different mechanism than the chromium parent
// class.
TimeDuration timeout = (aTimeoutMs > 0)
? TimeDuration::FromMilliseconds(aTimeoutMs)
: TimeDuration::Forever();
MonitorAutoLock lock(mMonitor);
TimeStamp waitStart = TimeStamp::Now();
TimeStamp current;
// We'll receive several notifications, we need to exit when we
// have either successfully launched or have timed out.
while (mProcessState != PROCESS_CONNECTED) {
// If there was an error then return it, don't wait out the timeout.
if (mProcessState == PROCESS_ERROR) {
break;
}
CVStatus status = lock.Wait(timeout);
if (status == CVStatus::Timeout) {
break;
}
if (timeout != TimeDuration::Forever()) {
current = TimeStamp::Now();
timeout -= current - waitStart;
waitStart = current;
}
}
return mProcessState == PROCESS_CONNECTED;
}
bool GeckoChildProcessHost::LaunchAndWaitForProcessHandle(
StringVector aExtraOpts) {
if (!AsyncLaunch(std::move(aExtraOpts))) {
return false;
}
MonitorAutoLock lock(mMonitor);
while (mProcessState < PROCESS_CREATED) {
lock.Wait();
}
MOZ_ASSERT(mProcessState == PROCESS_ERROR || mChildProcessHandle);
return mProcessState < PROCESS_ERROR;
}
void GeckoChildProcessHost::InitializeChannel() {
CreateChannel();
MonitorAutoLock lock(mMonitor);
mProcessState = CHANNEL_INITIALIZED;
lock.Notify();
}
void GeckoChildProcessHost::Join() {
AssertIOThread();
if (!mChildProcessHandle) {
return;
}
// If this fails, there's nothing we can do.
base::KillProcess(mChildProcessHandle, 0, /*wait*/ true);
SetAlreadyDead();
}
void GeckoChildProcessHost::SetAlreadyDead() {
if (mChildProcessHandle && mChildProcessHandle != kInvalidProcessHandle) {
base::CloseProcessHandle(mChildProcessHandle);
}
mChildProcessHandle = 0;
}
void BaseProcessLauncher::GetChildLogName(const char* origLogName,
nsACString& buffer) {
#ifdef XP_WIN
// On Windows we must expand relative paths because sandboxing rules
// bound only to full paths. fopen fowards to NtCreateFile which checks
// the path against the sanboxing rules as passed to fopen (left relative).
char absPath[MAX_PATH + 2];
if (_fullpath(absPath, origLogName, sizeof(absPath))) {
# ifdef MOZ_SANDBOX
// We need to make sure the child log name doesn't contain any junction
// points or symlinks or the sandbox will reject rules to allow writing.
std::wstring resolvedPath(NS_ConvertUTF8toUTF16(absPath).get());
if (widget::WinUtils::ResolveJunctionPointsAndSymLinks(resolvedPath)) {
AppendUTF16toUTF8(
MakeSpan(reinterpret_cast<const char16_t*>(resolvedPath.data()),
resolvedPath.size()),
buffer);
} else
# endif
{
buffer.Append(absPath);
}
} else
#endif
{
buffer.Append(origLogName);
}
// Append child-specific postfix to name
buffer.AppendLiteral(".child-");
buffer.AppendInt(gChildCounter);
}
// Windows needs a single dedicated thread for process launching,
// because of thread-safety restrictions/assertions in the sandbox
// code. (This implementation isn't itself Windows-specific, so
// the ifdef can be changed to test on other platforms.)
#ifdef XP_WIN
static mozilla::StaticMutex gIPCLaunchThreadMutex;
static mozilla::StaticRefPtr<nsIThread> gIPCLaunchThread;
class IPCLaunchThreadObserver final : public nsIObserver {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
protected:
virtual ~IPCLaunchThreadObserver() = default;
};
NS_IMPL_ISUPPORTS(IPCLaunchThreadObserver, nsIObserver, nsISupports)
NS_IMETHODIMP
IPCLaunchThreadObserver::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
MOZ_RELEASE_ASSERT(strcmp(aTopic, "xpcom-shutdown-threads") == 0);
StaticMutexAutoLock lock(gIPCLaunchThreadMutex);
nsresult rv = NS_OK;
if (gIPCLaunchThread) {
rv = gIPCLaunchThread->Shutdown();
gIPCLaunchThread = nullptr;
}
mozilla::Unused << NS_WARN_IF(NS_FAILED(rv));
return rv;
}
nsCOMPtr<nsIEventTarget> BaseProcessLauncher::GetIPCLauncher() {
StaticMutexAutoLock lock(gIPCLaunchThreadMutex);
if (!gIPCLaunchThread) {
nsCOMPtr<nsIThread> thread;
nsresult rv = NS_NewNamedThread(NS_LITERAL_CSTRING("IPC Launch"),
getter_AddRefs(thread));
if (!NS_WARN_IF(NS_FAILED(rv))) {
NS_DispatchToMainThread(
NS_NewRunnableFunction("GeckoChildProcessHost::GetIPCLauncher", [] {
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
nsCOMPtr<nsIObserver> obs = new IPCLaunchThreadObserver();
obsService->AddObserver(obs, "xpcom-shutdown-threads", false);
}));
gIPCLaunchThread = thread.forget();
}
}
nsCOMPtr<nsIEventTarget> thread = gIPCLaunchThread.get();
MOZ_DIAGNOSTIC_ASSERT(thread);
return thread;
}
#else // XP_WIN
// Non-Windows platforms can use an on-demand thread pool.
nsCOMPtr<nsIEventTarget> BaseProcessLauncher::GetIPCLauncher() {
nsCOMPtr<nsIEventTarget> pool =
mozilla::SharedThreadPool::Get(NS_LITERAL_CSTRING("IPC Launch"));
MOZ_DIAGNOSTIC_ASSERT(pool);
return pool;
}
#endif // XP_WIN
void
#if defined(XP_WIN)
AddAppDirToCommandLine(CommandLine& aCmdLine)
#else
AddAppDirToCommandLine(std::vector<std::string>& aCmdLine)
#endif
{
// Content processes need access to application resources, so pass
// the full application directory path to the child process.
if (ShouldHaveDirectoryService()) {
nsCOMPtr<nsIProperties> directoryService(
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
NS_ASSERTION(directoryService, "Expected XPCOM to be available");
if (directoryService) {
nsCOMPtr<nsIFile> appDir;
// NS_XPCOM_CURRENT_PROCESS_DIR really means the app dir, not the
// current process dir.
nsresult rv =
directoryService->Get(NS_XPCOM_CURRENT_PROCESS_DIR,
NS_GET_IID(nsIFile), getter_AddRefs(appDir));
if (NS_SUCCEEDED(rv)) {
#if defined(XP_WIN)
nsString path;
MOZ_ALWAYS_SUCCEEDS(appDir->GetPath(path));
aCmdLine.AppendLooseValue(UTF8ToWide("-appdir"));
std::wstring wpath(path.get());
aCmdLine.AppendLooseValue(wpath);
#else
nsAutoCString path;
MOZ_ALWAYS_SUCCEEDS(appDir->GetNativePath(path));
aCmdLine.push_back("-appdir");
aCmdLine.push_back(path.get());
#endif
}
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
// Full path to the profile dir
nsCOMPtr<nsIFile> profileDir;
rv =
directoryService->Get(NS_APP_USER_PROFILE_50_DIR, NS_GET_IID(nsIFile),
getter_AddRefs(profileDir));
if (NS_SUCCEEDED(rv)) {
// If the profile doesn't exist, normalization will
// fail. But we don't return an error here because some
// tests require startup with a missing profile dir.
// For users, almost universally, the profile will be in
// the home directory and normalization isn't required.
mozilla::Unused << profileDir->Normalize();
nsAutoCString path;
MOZ_ALWAYS_SUCCEEDS(profileDir->GetNativePath(path));
aCmdLine.push_back("-profile");
aCmdLine.push_back(path.get());
}
#endif
}
}
}
#if defined(XP_WIN) && (defined(MOZ_SANDBOX) || defined(_ARM64_))
static bool Contains(const std::vector<std::string>& aExtraOpts,
const char* aValue) {
return std::any_of(aExtraOpts.begin(), aExtraOpts.end(),
[&](const std::string arg) {
return arg.find(aValue) != std::string::npos;
});
}
#endif // defined(XP_WIN) && (defined(MOZ_SANDBOX) || defined(_ARM64_))
RefPtr<ProcessLaunchPromise> BaseProcessLauncher::PerformAsyncLaunch() {
if (!DoSetup()) {
return ProcessLaunchPromise::CreateAndReject(LaunchError{}, __func__);
}
RefPtr<BaseProcessLauncher> self = this;
return DoLaunch()->Then(
mLaunchThread, __func__,
[self](base::ProcessHandle aHandle) {
self->mResults.mHandle = aHandle;
return self->FinishLaunch();
},
[](LaunchError aError) {
return ProcessLaunchPromise::CreateAndReject(aError, __func__);
});
}
bool BaseProcessLauncher::DoSetup() {
#ifdef MOZ_GECKO_PROFILER
RefPtr<BaseProcessLauncher> self = this;
GetProfilerEnvVarsForChildProcess([self](const char* key, const char* value) {
self->mLaunchOptions->env_map[ENVIRONMENT_STRING(key)] =
ENVIRONMENT_STRING(value);
});
#endif
MapChildLogging();
return PR_CreatePipe(&mCrashAnnotationReadPipe.rwget(),
&mCrashAnnotationWritePipe.rwget()) == PR_SUCCESS;
}
void BaseProcessLauncher::MapChildLogging() {
const char* origNSPRLogName = PR_GetEnv("NSPR_LOG_FILE");
const char* origMozLogName = PR_GetEnv("MOZ_LOG_FILE");
if (origNSPRLogName) {
nsAutoCString nsprLogName;
GetChildLogName(origNSPRLogName, nsprLogName);
mLaunchOptions->env_map[ENVIRONMENT_LITERAL("NSPR_LOG_FILE")] =
ENVIRONMENT_STRING(nsprLogName.get());
}
if (origMozLogName) {
nsAutoCString mozLogName;
GetChildLogName(origMozLogName, mozLogName);
mLaunchOptions->env_map[ENVIRONMENT_LITERAL("MOZ_LOG_FILE")] =
ENVIRONMENT_STRING(mozLogName.get());
}
// `RUST_LOG_CHILD` is meant for logging child processes only.
nsAutoCString childRustLog(PR_GetEnv("RUST_LOG_CHILD"));
if (!childRustLog.IsEmpty()) {
mLaunchOptions->env_map[ENVIRONMENT_LITERAL("RUST_LOG")] =
ENVIRONMENT_STRING(childRustLog.get());
}
}
#if defined(MOZ_WIDGET_GTK)
bool LinuxProcessLauncher::DoSetup() {
if (!PosixProcessLauncher::DoSetup()) {
return false;
}
if (mProcessType == GeckoProcessType_Content) {
// disable IM module to avoid sandbox violation
mLaunchOptions->env_map["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.
mLaunchOptions->env_map["NO_AT_BRIDGE"] = "1";
}
# ifdef MOZ_SANDBOX
if (!mTmpDirName.IsEmpty()) {
// Point a bunch of things that might want to write from content to our
// shiny new content-process specific tmpdir
mLaunchOptions->env_map[ENVIRONMENT_LITERAL("TMPDIR")] =
ENVIRONMENT_STRING(mTmpDirName.get());
// Partial fix for bug 1380051 (not persistent - should be)
mLaunchOptions->env_map[ENVIRONMENT_LITERAL("MESA_GLSL_CACHE_DIR")] =
ENVIRONMENT_STRING(mTmpDirName.get());
}
# endif // MOZ_SANDBOX
return true;
}
#endif // MOZ_WIDGET_GTK
#ifdef OS_POSIX
bool PosixProcessLauncher::DoSetup() {
if (!BaseProcessLauncher::DoSetup()) {
return false;
}
// 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());
# ifdef MOZ_WIDGET_GTK
if (mProcessType == GeckoProcessType_Plugin) {
new_ld_lib_path.AppendLiteral("/gtk2:");
new_ld_lib_path.Append(path.get());
}
# endif // MOZ_WIDGET_GTK
if (ld_library_path && *ld_library_path) {
new_ld_lib_path.Append(':');
new_ld_lib_path.Append(ld_library_path);
}
mLaunchOptions->env_map["LD_LIBRARY_PATH"] = new_ld_lib_path.get();
# elif OS_MACOSX // defined(OS_LINUX) || defined(OS_BSD)
mLaunchOptions->env_map["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");
mLaunchOptions->env_map["DYLD_INSERT_LIBRARIES"] = interpose.get();
# endif // defined(OS_LINUX) || defined(OS_BSD)
}
FilePath exePath;
BinPathType pathType = GetPathToBinary(exePath, mProcessType);
// remap the IPC socket fd to a well-known int, as the OS does for
// STDOUT_FILENO, for example
int srcChannelFd, dstChannelFd;
mChannel->GetClientFileDescriptorMapping(&srcChannelFd, &dstChannelFd);
mLaunchOptions->fds_to_remap.push_back(
std::pair<int, int>(srcChannelFd, dstChannelFd));
// no need for kProcessChannelID, the child process inherits the
// other end of the socketpair() from us
mChildArgv.push_back(exePath.value());
if (pathType == BinPathType::Self) {
mChildArgv.push_back("-contentproc");
}
mChildArgv.insert(mChildArgv.end(), mExtraOpts.begin(), mExtraOpts.end());
if (mProcessType != GeckoProcessType_GMPlugin) {
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))) {
mChildArgv.push_back("-greomni");
mChildArgv.push_back(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetNativePath(path))) {
mChildArgv.push_back("-appomni");
mChildArgv.push_back(path.get());
}
}
// Add the application directory path (-appdir path)
AddAppDirToCommandLine(mChildArgv);
}
mChildArgv.push_back(mPidString);
if (!CrashReporter::IsDummy()) {
# if defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS)
int childCrashFd, childCrashRemapFd;
if (!CrashReporter::CreateNotificationPipeForChild(&childCrashFd,
&childCrashRemapFd)) {
return false;
}
if (0 <= childCrashFd) {
mLaunchOptions->fds_to_remap.push_back(
std::pair<int, int>(childCrashFd, childCrashRemapFd));
// "true" == crash reporting enabled
mChildArgv.push_back("true");
} else {
// "false" == crash reporting disabled
mChildArgv.push_back("false");
}
# elif defined(MOZ_WIDGET_COCOA) /* defined(OS_LINUX) || defined(OS_BSD) || \
defined(OS_SOLARIS) */
mChildArgv.push_back(CrashReporter::GetChildNotificationPipe());
# endif // defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS)
}
int fd = PR_FileDesc2NativeHandle(mCrashAnnotationWritePipe);
mLaunchOptions->fds_to_remap.push_back(
std::make_pair(fd, CrashReporter::GetAnnotationTimeCrashFd()));
# ifdef MOZ_WIDGET_COCOA
mChildArgv.push_back(
static_cast<MacProcessLauncher*>(this)->mMachConnectionName.c_str());
# endif // MOZ_WIDGET_COCOA
mChildArgv.push_back(ChildProcessType());
return true;
}
#endif // OS_POSIX
#if defined(MOZ_WIDGET_ANDROID)
RefPtr<ProcessHandlePromise> AndroidProcessLauncher::DoLaunch() {
ProcessHandle handle = 0;
LaunchAndroidService(ChildProcessType(), mChildArgv,
mLaunchOptions->fds_to_remap, &handle);
return handle != 0
? ProcessHandlePromise::CreateAndResolve(handle, __func__)
: ProcessHandlePromise::CreateAndReject(LaunchError{}, __func__);
}
#endif // MOZ_WIDGET_ANDROID
#ifdef OS_POSIX
RefPtr<ProcessHandlePromise> PosixProcessLauncher::DoLaunch() {
ProcessHandle handle = 0;
if (!base::LaunchApp(mChildArgv, *mLaunchOptions, &handle)) {
return ProcessHandlePromise::CreateAndReject(LaunchError{}, __func__);
}
return ProcessHandlePromise::CreateAndResolve(handle, __func__);
}
bool PosixProcessLauncher::DoFinishLaunch() {
if (!BaseProcessLauncher::DoFinishLaunch()) {
return false;
}
// 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).
mChannel->CloseClientFileDescriptor();
return true;
}
#endif // OS_POSIX
#ifdef XP_MACOSX
bool MacProcessLauncher::DoFinishLaunch() {
// Wait for the child process to send us its 'task_t' data.
const int kTimeoutMs = 10000;
MachReceiveMessage child_message;
kern_return_t err =
mParentRecvPort.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(
mResults.mHandle, parent_recv_port_memory, parent_recv_port_memory_ack,
parent_send_port_memory, parent_send_port_memory_ack, 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.
mResults.mChildTask = child_task;
return true;
}
#endif // XP_MACOSX
#ifdef XP_WIN
bool WindowsProcessLauncher::DoSetup() {
if (!BaseProcessLauncher::DoSetup()) {
return false;
}
FilePath exePath;
BinPathType pathType = GetPathToBinary(exePath, mProcessType);
# if defined(MOZ_SANDBOX) || defined(_ARM64_)
const bool isGMP = mProcessType == GeckoProcessType_GMPlugin;
const bool isWidevine = isGMP && Contains(mExtraOpts, "gmp-widevinecdm");
# if defined(_ARM64_)
const bool isClearKey = isGMP && Contains(mExtraOpts, "gmp-clearkey");
const bool isSandboxBroker =
mProcessType == GeckoProcessType_RemoteSandboxBroker;
if (isClearKey || isWidevine || isSandboxBroker) {
// On Windows on ARM64 for ClearKey and Widevine, and for the sandbox
// launcher process, we want to run the x86 plugin-container.exe in
// the "i686" subdirectory, instead of the aarch64 plugin-container.exe.
// So insert "i686" into the exePath.
exePath = exePath.DirName().AppendASCII("i686").Append(exePath.BaseName());
}
# endif // if defined(_ARM64_)
# endif // defined(MOZ_SANDBOX) || defined(_ARM64_)
mCmdLine.emplace(exePath.ToWStringHack());
if (pathType == BinPathType::Self) {
mCmdLine->AppendLooseValue(UTF8ToWide("-contentproc"));
}
mCmdLine->AppendSwitchWithValue(switches::kProcessChannelID, mChannelId);
for (std::vector<std::string>::iterator it = mExtraOpts.begin();
it != mExtraOpts.end(); ++it) {
mCmdLine->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))) {
mCmdLine->AppendLooseValue(UTF8ToWide("-greomni"));
mCmdLine->AppendLooseValue(path.get());
}
file = Omnijar::GetPath(Omnijar::APP);
if (file && NS_SUCCEEDED(file->GetPath(path))) {
mCmdLine->AppendLooseValue(UTF8ToWide("-appomni"));
mCmdLine->AppendLooseValue(path.get());
}
}
# if defined(MOZ_SANDBOX)
# if defined(_ARM64_)
if (isClearKey || isWidevine)
mResults.mSandboxBroker = new RemoteSandboxBroker();
else
# endif // if defined(_ARM64_)
mResults.mSandboxBroker = new SandboxBroker();
// 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 (mSandboxLevel > 0) {
// 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.
mResults.mSandboxBroker->SetSecurityLevelForContentProcess(
mSandboxLevel, mIsFileContent);
mUseSandbox = true;
}
break;
case GeckoProcessType_Plugin:
if (mSandboxLevel > 0 && !PR_GetEnv("MOZ_DISABLE_NPAPI_SANDBOX")) {
if (!mResults.mSandboxBroker->SetSecurityLevelForPluginProcess(
mSandboxLevel)) {
return false;
}
mUseSandbox = 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.
auto level =
isWidevine ? SandboxBroker::Restricted : SandboxBroker::LockDown;
if (!mResults.mSandboxBroker->SetSecurityLevelForGMPlugin(level)) {
return false;
}
mUseSandbox = 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.
mResults.mSandboxBroker->SetSecurityLevelForGPUProcess(mSandboxLevel);
mUseSandbox = true;
}
break;
case GeckoProcessType_VR:
if (mSandboxLevel > 0 && !PR_GetEnv("MOZ_DISABLE_VR_SANDBOX")) {
// TODO: Implement sandbox for VR process, Bug 1430043.
}
break;
case GeckoProcessType_RDD:
if (!PR_GetEnv("MOZ_DISABLE_RDD_SANDBOX")) {
if (!mResults.mSandboxBroker->SetSecurityLevelForRDDProcess()) {
return false;
}
mUseSandbox = true;
}
break;
case GeckoProcessType_Socket:
// TODO - setup sandboxing for the socket process.
break;
case GeckoProcessType_RemoteSandboxBroker:
// We don't sandbox the sandbox launcher...
break;
case GeckoProcessType_Default:
default:
MOZ_CRASH("Bad process type in GeckoChildProcessHost");
break;
};
if (mUseSandbox) {
for (auto it = mAllowedFilesRead.begin(); it != mAllowedFilesRead.end();
++it) {
mResults.mSandboxBroker->AllowReadFile(it->c_str());
}
}
# endif // defined(MOZ_SANDBOX)
// Add the application directory path (-appdir path)
AddAppDirToCommandLine(mCmdLine.ref());
// 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
mCmdLine->AppendLooseValue(mGroupId.get());
// Process id
mCmdLine->AppendLooseValue(UTF8ToWide(mPidString));
mCmdLine->AppendLooseValue(
UTF8ToWide(CrashReporter::GetChildNotificationPipe()));
if (!CrashReporter::IsDummy()) {
PROsfd h = PR_FileDesc2NativeHandle(mCrashAnnotationWritePipe);
mLaunchOptions->handles_to_inherit.push_back(reinterpret_cast<HANDLE>(h));
std::string hStr = std::to_string(h);
mCmdLine->AppendLooseValue(UTF8ToWide(hStr));
}
// Process type
mCmdLine->AppendLooseValue(UTF8ToWide(ChildProcessType()));
# ifdef MOZ_SANDBOX
if (mUseSandbox) {
// Mark the handles to inherit as inheritable.
for (HANDLE h : mLaunchOptions->handles_to_inherit) {
mResults.mSandboxBroker->AddHandleToShare(h);
}
}
# endif // MOZ_SANDBOX
return true;
}
RefPtr<ProcessHandlePromise> WindowsProcessLauncher::DoLaunch() {
ProcessHandle handle = 0;
# ifdef MOZ_SANDBOX
if (mUseSandbox) {
if (mResults.mSandboxBroker->LaunchApp(
mCmdLine->program().c_str(),
mCmdLine->command_line_string().c_str(), mLaunchOptions->env_map,
mProcessType, mEnableSandboxLogging, &handle)) {
EnvironmentLog("MOZ_PROCESS_LOG")
.print("==> process %d launched child process %d (%S)\n",
base::GetCurrentProcId(), base::GetProcId(handle),
mCmdLine->command_line_string().c_str());
return ProcessHandlePromise::CreateAndResolve(handle, __func__);
}
ProcessHandlePromise::CreateAndReject(LaunchError{}, __func__);
}
# endif // defined(MOZ_SANDBOX)
if (!base::LaunchApp(mCmdLine.ref(), *mLaunchOptions, &handle)) {
return ProcessHandlePromise::CreateAndReject(LaunchError{}, __func__);
}
return ProcessHandlePromise::CreateAndResolve(handle, __func__);
}
bool WindowsProcessLauncher::DoFinishLaunch() {
if (!BaseProcessLauncher::DoFinishLaunch()) {
return false;
}
# ifdef MOZ_SANDBOX
// We need to be able to duplicate handles to some types of non-sandboxed
// child processes.
switch (mProcessType) {
case GeckoProcessType_Default:
MOZ_CRASH("shouldn't be launching a parent process");
case GeckoProcessType_Plugin:
case GeckoProcessType_IPDLUnitTest:
// No handle duplication necessary.
break;
default:
if (!SandboxBroker::AddTargetPeer(mResults.mHandle)) {
NS_WARNING("Failed to add child process as target peer.");
}
break;
}
# endif // MOZ_SANDBOX
return true;
}
#endif // XP_WIN
RefPtr<ProcessLaunchPromise> BaseProcessLauncher::FinishLaunch() {
if (!DoFinishLaunch()) {
return ProcessLaunchPromise::CreateAndReject(LaunchError{}, __func__);
}
MOZ_DIAGNOSTIC_ASSERT(mResults.mHandle);
CrashReporter::RegisterChildCrashAnnotationFileDescriptor(
base::GetProcId(mResults.mHandle), mCrashAnnotationReadPipe.forget());
Telemetry::AccumulateTimeDelta(Telemetry::CHILD_PROCESS_LAUNCH_MS,
mStartTimeStamp);
return ProcessLaunchPromise::CreateAndResolve(mResults, __func__);
}
bool GeckoChildProcessHost::OpenPrivilegedHandle(base::ProcessId aPid) {
if (mChildProcessHandle) {
MOZ_ASSERT(aPid == base::GetProcId(mChildProcessHandle));
return true;
}
return base::OpenPrivilegedProcessHandle(aPid, &mChildProcessHandle);
}
void GeckoChildProcessHost::OnChannelConnected(int32_t peer_pid) {
if (!OpenPrivilegedHandle(peer_pid)) {
MOZ_CRASH("can't open handle to child process");
}
MonitorAutoLock lock(mMonitor);
mProcessState = PROCESS_CONNECTED;
lock.Notify();
}
void GeckoChildProcessHost::OnMessageReceived(IPC::Message&& aMsg) {
// We never process messages ourself, just save them up for the next
// listener.
mQueue.push(std::move(aMsg));
}
void GeckoChildProcessHost::OnChannelError() {
// Update the process state to an error state if we have a channel
// error before we're connected. This fixes certain failures,
// but does not address the full range of possible issues described
// in the FIXME comment below.
MonitorAutoLock lock(mMonitor);
if (mProcessState < PROCESS_CONNECTED) {
mProcessState = PROCESS_ERROR;
lock.Notify();
}
// FIXME/bug 773925: save up this error for the next listener.
}
RefPtr<ProcessHandlePromise> GeckoChildProcessHost::WhenProcessHandleReady() {
MOZ_ASSERT(mHandlePromise != nullptr);
return mHandlePromise;
}
void GeckoChildProcessHost::GetQueuedMessages(std::queue<IPC::Message>& queue) {
// If this is called off the IO thread, bad things will happen.
DCHECK(MessageLoopForIO::current());
swap(queue, mQueue);
// We expect the next listener to take over processing of our queue.
}
#ifdef MOZ_WIDGET_ANDROID
void AndroidProcessLauncher::LaunchAndroidService(
const char* type, const std::vector<std::string>& argv,
const base::file_handle_mapping_vector& fds_to_remap,
base::ProcessHandle* process_handle) {
MOZ_RELEASE_ASSERT((2 <= fds_to_remap.size()) && (fds_to_remap.size() <= 5));
JNIEnv* const env = mozilla::jni::GetEnvForThread();
MOZ_ASSERT(env);
const int argvSize = argv.size();
jni::ObjectArray::LocalRef jargs =
jni::ObjectArray::New<jni::String>(argvSize);
for (int ix = 0; ix < argvSize; ix++) {
jargs->SetElement(ix, jni::StringParam(argv[ix].c_str(), env));
}
// XXX: this processing depends entirely on the internals of
// ContentParent::LaunchSubprocess()
// GeckoChildProcessHost::PerformAsyncLaunch(), and the order in
// which they append to fds_to_remap. There must be a better way to do it.
// See bug 1440207.
int32_t prefsFd = fds_to_remap[0].first;
int32_t prefMapFd = fds_to_remap[1].first;
int32_t ipcFd = fds_to_remap[2].first;
int32_t crashFd = -1;
int32_t crashAnnotationFd = -1;
if (fds_to_remap.size() == 4) {
crashAnnotationFd = fds_to_remap[3].first;
}
if (fds_to_remap.size() == 5) {
crashFd = fds_to_remap[3].first;
crashAnnotationFd = fds_to_remap[4].first;
}
int32_t handle = java::GeckoProcessManager::Start(
type, jargs, prefsFd, prefMapFd, ipcFd, crashFd, crashAnnotationFd);
if (process_handle) {
*process_handle = handle;
}
}
#endif
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
bool GeckoChildProcessHost::AppendMacSandboxParams(StringVector& aArgs) {
MacSandboxInfo info;
if (!FillMacSandboxInfo(info)) {
return false;
}
info.AppendAsParams(aArgs);
return true;
}
// Fill |aInfo| with the flags needed to launch the utility sandbox
/* static */
bool GeckoChildProcessHost::StaticFillMacSandboxInfo(MacSandboxInfo& aInfo) {
aInfo.type = GetDefaultMacSandboxType();
aInfo.shouldLog = Preferences::GetBool("security.sandbox.logging.enabled") ||
PR_GetEnv("MOZ_SANDBOX_LOGGING");
nsAutoCString appPath;
if (!nsMacUtilsImpl::GetAppPath(appPath)) {
MOZ_CRASH("Failed to get app path");
}
aInfo.appPath.assign(appPath.get());
return true;
}
bool GeckoChildProcessHost::FillMacSandboxInfo(MacSandboxInfo& aInfo) {
return GeckoChildProcessHost::StaticFillMacSandboxInfo(aInfo);
}
//
// If early sandbox startup is enabled for this process type, map the
// process type to the sandbox type and enable the sandbox. Returns true
// if no errors were encountered or if early sandbox startup is not
// enabled for this process. Returns false if an error was encountered.
//
/* static */
bool GeckoChildProcessHost::StartMacSandbox(int aArgc, char** aArgv,
std::string& aErrorMessage) {
MacSandboxType sandboxType = MacSandboxType_Invalid;
switch (XRE_GetProcessType()) {
// For now, only support early sandbox startup for content,
// RDD, and GMP processes. Add case statements for the additional
// process types once early sandbox startup is implemented for them.
case GeckoProcessType_Content:
// Content processes don't use GeckoChildProcessHost
// to configure sandboxing so hard code the sandbox type.
sandboxType = MacSandboxType_Content;
break;
case GeckoProcessType_RDD:
sandboxType = RDDProcessHost::GetMacSandboxType();
break;
case GeckoProcessType_GMPlugin:
sandboxType = gmp::GMPProcessParent::GetMacSandboxType();
break;
default:
return true;
}
return mozilla::StartMacSandboxIfEnabled(sandboxType, aArgc, aArgv,
aErrorMessage);
}
#endif /* XP_MACOSX && MOZ_SANDBOX */
/* static */
void GeckoChildProcessHost::GetAll(const GeckoProcessCallback& aCallback) {
StaticMutexAutoLock lock(sMutex);
for (GeckoChildProcessHost* gp = sGeckoChildProcessHosts->getFirst(); gp;
gp = static_cast<mozilla::LinkedListElement<GeckoChildProcessHost>*>(gp)
->getNext()) {
aCallback(gp);
}
}
RefPtr<ProcessLaunchPromise> BaseProcessLauncher::Launch(
GeckoChildProcessHost* aHost) {
AssertIOThread();
// Initializing the channel needs to happen on the I/O thread, but everything
// else can run on the launcher thread (or pool), to avoid blocking IPC
// messages.
//
// We avoid passing the host to the launcher thread to reduce the chances of
// data races with the IO thread (where e.g. OnChannelConnected may run
// concurrently). The pool currently needs access to the channel, which is not
// great.
//
// It's also unfortunate that we need to work with raw pointers to both the
// host and the channel. The assumption here is that the host (and therefore
// the channel) are never torn down until the return promise is resolved or
// rejected.
aHost->InitializeChannel();
mChannel = aHost->GetChannel();
if (!mChannel) {
return ProcessLaunchPromise::CreateAndReject(LaunchError{}, __func__);
}
mChannelId = aHost->GetChannelId();
return InvokeAsync(mLaunchThread, this, __func__,
&BaseProcessLauncher::PerformAsyncLaunch);
}
} // namespace ipc
} // namespace mozilla
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