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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <mutex>
#include <unistd.h>
#include <android/permission_manager.h>
#include <binder/ActivityManager.h>
#include <binder/Binder.h>
#include <binder/IServiceManager.h>
#include <binder/ProcessState.h>
namespace android {
using namespace std::chrono_literals;
ActivityManager::ActivityManager()
{
}
sp<IActivityManager> ActivityManager::getService()
{
std::lock_guard<Mutex> scoped_lock(mLock);
sp<IActivityManager> service = mService;
if (ProcessState::self()->isThreadPoolStarted()) {
if (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
sp<IBinder> binder = defaultServiceManager()->waitForService(String16("activity"));
service = interface_cast<IActivityManager>(binder);
mService = service;
}
} else {
ALOGI("Thread pool not started. Polling for activity service.");
auto startTime = std::chrono::steady_clock::now().min();
while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
sp<IBinder> binder = defaultServiceManager()->checkService(String16("activity"));
if (binder == nullptr) {
// Wait for the activity service to come back...
if (startTime == startTime.min()) {
startTime = std::chrono::steady_clock::now();
ALOGI("Waiting for activity service");
} else if (std::chrono::steady_clock::now() - startTime > 1000s) {
// TODO(b/342453147): timeout of 1000s = 16min and 40s doesn't seem intended
ALOGW("Waiting too long for activity service, giving up");
service = nullptr;
break;
}
usleep(25000);
} else {
service = interface_cast<IActivityManager>(binder);
mService = service;
}
}
}
return mService;
}
int ActivityManager::openContentUri(const String16& stringUri)
{
sp<IActivityManager> service = getService();
return service != nullptr ? service->openContentUri(stringUri) : -1;
}
status_t ActivityManager::registerUidObserver(const sp<IUidObserver>& observer,
const int32_t event,
const int32_t cutpoint,
const String16& callingPackage)
{
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->registerUidObserver(observer, event, cutpoint, callingPackage);
}
// ActivityManagerService appears dead. Return usual error code for dead service.
return DEAD_OBJECT;
}
status_t ActivityManager::registerUidObserverForUids(const sp<IUidObserver>& observer,
const int32_t event, const int32_t cutpoint,
const String16& callingPackage,
const int32_t uids[], size_t nUids,
/*out*/ sp<IBinder>& observerToken) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->registerUidObserverForUids(observer, event, cutpoint, callingPackage, uids,
nUids, observerToken);
}
// ActivityManagerService appears dead. Return usual error code for dead service.
return DEAD_OBJECT;
}
status_t ActivityManager::unregisterUidObserver(const sp<IUidObserver>& observer)
{
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->unregisterUidObserver(observer);
}
// ActivityManagerService appears dead. Return usual error code for dead service.
return DEAD_OBJECT;
}
status_t ActivityManager::addUidToObserver(const sp<IBinder>& observerToken,
const String16& callingPackage, int32_t uid) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->addUidToObserver(observerToken, callingPackage, uid);
}
// ActivityManagerService appears dead. Return usual error code for dead service.
return DEAD_OBJECT;
}
status_t ActivityManager::removeUidFromObserver(const sp<IBinder>& observerToken,
const String16& callingPackage, int32_t uid) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->removeUidFromObserver(observerToken, callingPackage, uid);
}
// ActivityManagerService appears dead. Return usual error code for dead service.
return DEAD_OBJECT;
}
bool ActivityManager::isUidActive(const uid_t uid, const String16& callingPackage)
{
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->isUidActive(uid, callingPackage);
}
return false;
}
int32_t ActivityManager::getUidProcessState(const uid_t uid, const String16& callingPackage)
{
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->getUidProcessState(uid, callingPackage);
}
return PROCESS_STATE_UNKNOWN;
}
status_t ActivityManager::checkPermission(const String16& permission,
const pid_t pid,
const uid_t uid,
int32_t* outResult) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
return service->checkPermission(permission, pid, uid, outResult);
}
// ActivityManagerService appears dead. Return usual error code for dead service.
return DEAD_OBJECT;
}
status_t ActivityManager::linkToDeath(const sp<IBinder::DeathRecipient>& recipient) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
return IInterface::asBinder(service)->linkToDeath(recipient);
}
return INVALID_OPERATION;
}
status_t ActivityManager::unlinkToDeath(const sp<IBinder::DeathRecipient>& recipient) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
return IInterface::asBinder(service)->unlinkToDeath(recipient);
}
return INVALID_OPERATION;
}
} // namespace android
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