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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=2 et :
* 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
#include "GMPProcessParent.h"
#include "GMPUtils.h"
#include "nsIRunnable.h"
#ifdef XP_WIN
# include "WinUtils.h"
#endif
#include "GMPLog.h"
#include "mozilla/GeckoArgs.h"
#include "mozilla/ipc/ProcessChild.h"
#include "mozilla/ipc/ProcessUtils.h"
#include "mozilla/StaticPrefs_media.h"
#include "base/string_util.h"
#include "base/process_util.h"
#include <string>
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
# include "mozilla/Omnijar.h"
# include "mozilla/Preferences.h"
# include "mozilla/Sandbox.h"
# include "mozilla/SandboxSettings.h"
# include "nsMacUtilsImpl.h"
#endif
using std::string;
using std::vector;
using mozilla::gmp::GMPProcessParent;
using mozilla::ipc::GeckoChildProcessHost;
#ifdef MOZ_WIDGET_ANDROID
static const int kInvalidFd = -1;
#endif
namespace mozilla::gmp {
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
bool GMPProcessParent::sLaunchWithMacSandbox = true;
bool GMPProcessParent::sMacSandboxGMPLogging = false;
# if defined(DEBUG)
bool GMPProcessParent::sIsMainThreadInitDone = false;
# endif
#endif
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
/* static */
void GMPProcessParent::InitStaticMainThread() {
// The GMPProcessParent constructor is called off the
// main thread. Do main thread initialization here.
MOZ_ASSERT(NS_IsMainThread());
sMacSandboxGMPLogging =
Preferences::GetBool("security.sandbox.logging.enabled") ||
PR_GetEnv("MOZ_SANDBOX_GMP_LOGGING") || PR_GetEnv("MOZ_SANDBOX_LOGGING");
GMP_LOG_DEBUG("GMPProcessParent::InitStaticMainThread: sandbox logging=%s",
sMacSandboxGMPLogging ? "true" : "false");
# if defined(DEBUG)
sIsMainThreadInitDone = true;
# endif
}
#endif
GMPProcessParent::GMPProcessParent(const std::string& aGMPPath)
: GeckoChildProcessHost(GeckoProcessType_GMPlugin),
mGMPPath(aGMPPath),
mUseXpcom(StaticPrefs::media_gmp_use_minimal_xpcom())
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
,
mRequiresWindowServer(false)
#endif
{
MOZ_COUNT_CTOR(GMPProcessParent);
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
MOZ_ASSERT(sIsMainThreadInitDone == true);
mDisableOSActivityMode = sLaunchWithMacSandbox;
#endif
}
GMPProcessParent::~GMPProcessParent() { MOZ_COUNT_DTOR(GMPProcessParent); }
bool GMPProcessParent::Launch(int32_t aTimeoutMs) {
class PrefSerializerRunnable final : public Runnable {
public:
PrefSerializerRunnable()
: Runnable("GMPProcessParent::PrefSerializerRunnable"),
mMonitor("GMPProcessParent::PrefSerializerRunnable::mMonitor") {}
NS_IMETHOD Run() override {
auto prefSerializer = MakeUnique<ipc::SharedPreferenceSerializer>();
bool success =
prefSerializer->SerializeToSharedMemory(GeckoProcessType_GMPlugin,
/* remoteType */ ""_ns);
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(!mComplete);
if (success) {
mPrefSerializer = std::move(prefSerializer);
}
mComplete = true;
lock.Notify();
return NS_OK;
}
void Wait(int32_t aTimeoutMs,
UniquePtr<ipc::SharedPreferenceSerializer>& aOut) {
MonitorAutoLock lock(mMonitor);
TimeDuration timeout = TimeDuration::FromMilliseconds(aTimeoutMs);
while (!mComplete) {
if (lock.Wait(timeout) == CVStatus::Timeout) {
return;
}
}
aOut = std::move(mPrefSerializer);
}
private:
Monitor mMonitor;
UniquePtr<ipc::SharedPreferenceSerializer> mPrefSerializer
MOZ_GUARDED_BY(mMonitor);
bool mComplete MOZ_GUARDED_BY(mMonitor) = false;
};
nsresult rv;
vector<string> args;
UniquePtr<ipc::SharedPreferenceSerializer> prefSerializer;
ipc::ProcessChild::AddPlatformBuildID(args);
if (mUseXpcom) {
// Dispatch our runnable to the main thread to grab the serialized prefs. We
// can only do this on the main thread, and unfortunately we are the only
// process that launches from the non-main thread.
auto prefTask = MakeRefPtr<PrefSerializerRunnable>();
rv = NS_DispatchToMainThread(prefTask);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
// We don't want to release our thread context while we wait for the main
// thread to process the prefs. We already block when waiting for the launch
// of the process itself to finish, and the state machine assumes this call
// is blocking. This is also important for the buffering of pref updates,
// since we know any tasks dispatched with updates won't run until we launch
// (or fail to launch) the process.
prefTask->Wait(aTimeoutMs, prefSerializer);
if (NS_WARN_IF(!prefSerializer)) {
return false;
}
prefSerializer->AddSharedPrefCmdLineArgs(*this, args);
}
if (StaticPrefs::media_gmp_use_native_event_processing()) {
geckoargs::sPluginNativeEvent.Put(args);
}
#ifdef ALLOW_GECKO_CHILD_PROCESS_ARCH
GMP_LOG_DEBUG("GMPProcessParent::Launch() mLaunchArch: %d", mLaunchArch);
# if defined(XP_MACOSX)
mLaunchOptions->arch = mLaunchArch;
if (mLaunchArch == base::PROCESS_ARCH_X86_64) {
mLaunchOptions->env_map["MOZ_SHMEM_PAGESIZE_16K"] = 1;
}
# endif
#endif
// Resolve symlinks in the plugin path. The sandbox prevents
// resolving symlinks in the child process if access to link
// source file is denied.
#ifdef XP_WIN
nsAutoString normalizedPath;
#else
nsAutoCString normalizedPath;
#endif
rv = NormalizePath(mGMPPath.c_str(), normalizedPath);
if (NS_WARN_IF(NS_FAILED(rv))) {
GMP_LOG_DEBUG(
"GMPProcessParent::Launch: "
"plugin path normaliziation failed for path: %s",
mGMPPath.c_str());
}
#ifdef XP_WIN
std::wstring wGMPPath;
if (NS_SUCCEEDED(rv)) {
wGMPPath = normalizedPath.get();
} else {
wGMPPath = UTF8ToWide(mGMPPath.c_str());
}
// The sandbox doesn't allow file system rules where the paths contain
// symbolic links or junction points. Sometimes the Users folder has been
// moved to another drive using a junction point, so allow for this specific
if (NS_WARN_IF(
!widget::WinUtils::ResolveJunctionPointsAndSymLinks(wGMPPath))) {
GMP_LOG_DEBUG("ResolveJunctionPointsAndSymLinks failed for GMP path=%S",
wGMPPath.c_str());
return false;
}
GMP_LOG_DEBUG("GMPProcessParent::Launch() resolved path to %S",
wGMPPath.c_str());
# ifdef MOZ_SANDBOX
// If the GMP path is a network path that is not mapped to a drive letter,
// then we need to fix the path format for the sandbox rule.
wchar_t volPath[MAX_PATH];
if (::GetVolumePathNameW(wGMPPath.c_str(), volPath, MAX_PATH) &&
::GetDriveTypeW(volPath) == DRIVE_REMOTE &&
wGMPPath.compare(0, 2, L"\\\\") == 0) {
std::wstring sandboxGMPPath(wGMPPath);
sandboxGMPPath.insert(1, L"??\\UNC");
mAllowedFilesRead.push_back(sandboxGMPPath + L"\\*");
} else {
mAllowedFilesRead.push_back(wGMPPath + L"\\*");
}
# endif
std::string gmpPath = WideToUTF8(wGMPPath);
geckoargs::sPluginPath.Put(gmpPath.c_str(), args);
#else
if (NS_SUCCEEDED(rv)) {
geckoargs::sPluginPath.Put(normalizedPath.get(), args);
} else {
geckoargs::sPluginPath.Put(mGMPPath.c_str(), args);
}
#endif
#ifdef MOZ_WIDGET_ANDROID
// Add dummy values for pref and pref map to the file descriptors remapping
AddFdToRemap(kInvalidFd, kInvalidFd);
AddFdToRemap(kInvalidFd, kInvalidFd);
#endif
// We need to wait until OnChannelConnected to clear the pref serializer, but
// SyncLaunch will block until that is called, so we don't actually need to do
// any overriding, and it only lives on the stack.
return SyncLaunch(args, aTimeoutMs);
}
void GMPProcessParent::Delete(nsCOMPtr<nsIRunnable> aCallback) {
mDeletedCallback = aCallback;
XRE_GetIOMessageLoop()->PostTask(NewNonOwningRunnableMethod(
"gmp::GMPProcessParent::DoDelete", this, &GMPProcessParent::DoDelete));
}
void GMPProcessParent::DoDelete() {
MOZ_ASSERT(MessageLoop::current() == XRE_GetIOMessageLoop());
if (mDeletedCallback) {
mDeletedCallback->Run();
}
Destroy();
}
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
bool GMPProcessParent::IsMacSandboxLaunchEnabled() {
return sLaunchWithMacSandbox;
}
void GMPProcessParent::SetRequiresWindowServer(bool aRequiresWindowServer) {
mRequiresWindowServer = aRequiresWindowServer;
}
bool GMPProcessParent::FillMacSandboxInfo(MacSandboxInfo& aInfo) {
aInfo.type = MacSandboxType_GMP;
aInfo.hasWindowServer = mRequiresWindowServer;
aInfo.shouldLog = (aInfo.shouldLog || sMacSandboxGMPLogging);
nsAutoCString appPath;
if (!nsMacUtilsImpl::GetAppPath(appPath)) {
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: failed to get app path");
return false;
}
aInfo.appPath.assign(appPath.get());
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: "
"plugin dir path: %s",
mGMPPath.c_str());
nsCOMPtr<nsIFile> pluginDir;
nsresult rv = NS_NewLocalFile(NS_ConvertUTF8toUTF16(mGMPPath.c_str()), true,
getter_AddRefs(pluginDir));
if (NS_FAILED(rv)) {
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: "
"NS_NewLocalFile failed for plugin dir, rv=%d",
uint32_t(rv));
return false;
}
rv = pluginDir->Normalize();
if (NS_FAILED(rv)) {
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: "
"failed to normalize plugin dir path, rv=%d",
uint32_t(rv));
return false;
}
nsAutoCString resolvedPluginPath;
pluginDir->GetNativePath(resolvedPluginPath);
aInfo.pluginPath.assign(resolvedPluginPath.get());
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: "
"resolved plugin dir path: %s",
resolvedPluginPath.get());
if (!mozilla::IsPackagedBuild()) {
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: IsPackagedBuild()=false");
// Repo dir
nsCOMPtr<nsIFile> repoDir;
rv = nsMacUtilsImpl::GetRepoDir(getter_AddRefs(repoDir));
if (NS_FAILED(rv)) {
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: failed to get repo dir");
return false;
}
nsCString repoDirPath;
Unused << repoDir->GetNativePath(repoDirPath);
aInfo.testingReadPath1 = repoDirPath.get();
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: "
"repo dir path: %s",
repoDirPath.get());
// Object dir
nsCOMPtr<nsIFile> objDir;
rv = nsMacUtilsImpl::GetObjDir(getter_AddRefs(objDir));
if (NS_FAILED(rv)) {
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: failed to get object dir");
return false;
}
nsCString objDirPath;
Unused << objDir->GetNativePath(objDirPath);
aInfo.testingReadPath2 = objDirPath.get();
GMP_LOG_DEBUG(
"GMPProcessParent::FillMacSandboxInfo: "
"object dir path: %s",
objDirPath.get());
}
return true;
}
#endif
nsresult GMPProcessParent::NormalizePath(const char* aPath,
PathString& aNormalizedPath) {
nsCOMPtr<nsIFile> fileOrDir;
nsresult rv = NS_NewLocalFile(NS_ConvertUTF8toUTF16(aPath), true,
getter_AddRefs(fileOrDir));
NS_ENSURE_SUCCESS(rv, rv);
rv = fileOrDir->Normalize();
NS_ENSURE_SUCCESS(rv, rv);
#ifdef XP_WIN
return fileOrDir->GetTarget(aNormalizedPath);
#else
bool isLink = false;
rv = fileOrDir->IsSymlink(&isLink);
NS_ENSURE_SUCCESS(rv, rv);
if (isLink) {
return fileOrDir->GetNativeTarget(aNormalizedPath);
}
return fileOrDir->GetNativePath(aNormalizedPath);
#endif
}
} // namespace mozilla::gmp