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/*
* Copyright (C) 2019 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 <android-base/logging.h>
#include <android-base/properties.h>
#include <binder/IPCThreadState.h>
#include <binder/ProcessState.h>
#include <binder/Status.h>
#include <sys/timerfd.h>
#include <utils/Looper.h>
#include <utils/StrongPointer.h>
#include "Access.h"
#include "ServiceManager.h"
#if !defined(VENDORSERVICEMANAGER) && !defined(__ANDROID_RECOVERY__)
#include <perfetto/public/producer.h>
#include <perfetto/public/te_category_macros.h>
#include <perfetto/public/te_macros.h>
#include <perfetto/public/track_event.h>
namespace android {
static void register_perfetto_te_categories() {
struct PerfettoProducerInitArgs perfetto_args = PERFETTO_PRODUCER_INIT_ARGS_INIT();
perfetto_args.backends = PERFETTO_BACKEND_SYSTEM;
PerfettoProducerInit(perfetto_args);
PerfettoTeInit();
PERFETTO_TE_REGISTER_CATEGORIES(PERFETTO_SM_CATEGORIES);
}
} // namespace android
#endif // !defined(VENDORSERVICEMANAGER) && !defined(__ANDROID_RECOVERY__)
using ::android::Access;
using ::android::IPCThreadState;
using ::android::Looper;
using ::android::LooperCallback;
using ::android::ProcessState;
using ::android::ServiceManager;
using ::android::sp;
using ::android::base::SetProperty;
using ::android::os::IServiceManager;
class BinderCallback : public LooperCallback {
public:
static sp<BinderCallback> setupTo(const sp<Looper>& looper) {
sp<BinderCallback> cb = sp<BinderCallback>::make();
cb->mLooper = looper;
IPCThreadState::self()->setupPolling(&cb->mBinderFd);
LOG_ALWAYS_FATAL_IF(cb->mBinderFd < 0, "Failed to setupPolling: %d", cb->mBinderFd);
int ret = looper->addFd(cb->mBinderFd, Looper::POLL_CALLBACK, Looper::EVENT_INPUT, cb,
nullptr /*data*/);
LOG_ALWAYS_FATAL_IF(ret != 1, "Failed to add binder FD to Looper");
return cb;
}
int handleEvent(int /* fd */, int /* events */, void* /* data */) override {
IPCThreadState::self()->handlePolledCommands();
return 1; // Continue receiving callbacks.
}
void repoll() {
if (!mLooper->repoll(mBinderFd)) {
ALOGE("Failed to repoll binder FD.");
}
}
private:
sp<Looper> mLooper;
int mBinderFd = -1;
};
// LooperCallback for IClientCallback
class ClientCallbackCallback : public LooperCallback {
public:
static sp<ClientCallbackCallback> setupTo(const sp<Looper>& looper,
const sp<ServiceManager>& manager,
sp<BinderCallback> binderCallback) {
sp<ClientCallbackCallback> cb = sp<ClientCallbackCallback>::make(manager);
cb->mBinderCallback = binderCallback;
int fdTimer = timerfd_create(CLOCK_MONOTONIC, 0 /*flags*/);
LOG_ALWAYS_FATAL_IF(fdTimer < 0, "Failed to timerfd_create: fd: %d err: %d", fdTimer, errno);
itimerspec timespec {
.it_interval = {
.tv_sec = 5,
.tv_nsec = 0,
},
.it_value = {
.tv_sec = 5,
.tv_nsec = 0,
},
};
int timeRes = timerfd_settime(fdTimer, 0 /*flags*/, ×pec, nullptr);
LOG_ALWAYS_FATAL_IF(timeRes < 0, "Failed to timerfd_settime: res: %d err: %d", timeRes, errno);
int addRes = looper->addFd(fdTimer,
Looper::POLL_CALLBACK,
Looper::EVENT_INPUT,
cb,
nullptr);
LOG_ALWAYS_FATAL_IF(addRes != 1, "Failed to add client callback FD to Looper");
return cb;
}
int handleEvent(int fd, int /*events*/, void* /*data*/) override {
uint64_t expirations;
int ret = read(fd, &expirations, sizeof(expirations));
if (ret != sizeof(expirations)) {
ALOGE("Read failed to callback FD: ret: %d err: %d", ret, errno);
}
mManager->handleClientCallbacks();
mBinderCallback->repoll(); // b/316829336
return 1; // Continue receiving callbacks.
}
private:
friend sp<ClientCallbackCallback>;
ClientCallbackCallback(const sp<ServiceManager>& manager) : mManager(manager) {}
sp<ServiceManager> mManager;
sp<BinderCallback> mBinderCallback;
};
int main(int argc, char** argv) {
android::base::InitLogging(argv, android::base::KernelLogger);
if (argc > 2) {
LOG(FATAL) << "usage: " << argv[0] << " [binder driver]";
}
const char* driver = argc == 2 ? argv[1] : "/dev/binder";
#if !defined(VENDORSERVICEMANAGER) && !defined(__ANDROID_RECOVERY__)
android::register_perfetto_te_categories();
#endif // !defined(VENDORSERVICEMANAGER) && !defined(__ANDROID_RECOVERY__)
LOG(INFO) << "Starting sm instance on " << driver;
sp<ProcessState> ps = ProcessState::initWithDriver(driver);
ps->setThreadPoolMaxThreadCount(0);
ps->setCallRestriction(ProcessState::CallRestriction::FATAL_IF_NOT_ONEWAY);
IPCThreadState::self()->disableBackgroundScheduling(true);
sp<ServiceManager> manager = sp<ServiceManager>::make(std::make_unique<Access>());
if (!manager->addService("manager", manager, false /*allowIsolated*/, IServiceManager::DUMP_FLAG_PRIORITY_DEFAULT).isOk()) {
LOG(ERROR) << "Could not self register servicemanager";
}
IPCThreadState::self()->setTheContextObject(manager);
if (!ps->becomeContextManager()) {
LOG(FATAL) << "Could not become context manager";
}
sp<Looper> looper = Looper::prepare(false /*allowNonCallbacks*/);
sp<BinderCallback> binderCallback = BinderCallback::setupTo(looper);
ClientCallbackCallback::setupTo(looper, manager, binderCallback);
#ifndef VENDORSERVICEMANAGER
if (!SetProperty("servicemanager.ready", "true")) {
LOG(ERROR) << "Failed to set servicemanager ready property";
}
#endif
while(true) {
looper->pollAll(-1);
}
// should not be reached
return EXIT_FAILURE;
}
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