1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define DEBUG false // STOPSHIP if true
18 #include "Log.h"
19
20 #include "StatsService.h"
21 #include "socket/StatsSocketListener.h"
22
23 #include <android/binder_interface_utils.h>
24 #include <android/binder_process.h>
25 #include <android/binder_manager.h>
26 #include <utils/Looper.h>
27
28 #include <stdio.h>
29 #include <sys/stat.h>
30 #include <sys/types.h>
31 #include <unistd.h>
32
33 using namespace android;
34 using namespace android::os::statsd;
35 using ::ndk::SharedRefBase;
36 using std::shared_ptr;
37 using std::make_shared;
38
39 shared_ptr<StatsService> gStatsService = nullptr;
40 sp<StatsSocketListener> gSocketListener = nullptr;
41
signalHandler(int sig)42 void signalHandler(int sig) {
43 if (sig == SIGPIPE) {
44 // ShellSubscriber uses SIGPIPE as a signal to detect the end of the
45 // client process. Don't prematurely exit(1) here. Instead, ignore the
46 // signal and allow the write call to return EPIPE.
47 ALOGI("statsd received SIGPIPE. Ignoring signal.");
48 return;
49 }
50
51 if (gSocketListener != nullptr) gSocketListener->stopListener();
52 if (gStatsService != nullptr) gStatsService->Terminate();
53 ALOGW("statsd terminated on receiving signal %d.", sig);
54 exit(1);
55 }
56
registerSignalHandlers()57 void registerSignalHandlers()
58 {
59 struct sigaction sa;
60 sigemptyset(&sa.sa_mask);
61 sa.sa_flags = 0;
62 sa.sa_handler = signalHandler;
63 sigaction(SIGPIPE, &sa, nullptr);
64 sigaction(SIGHUP, &sa, nullptr);
65 sigaction(SIGINT, &sa, nullptr);
66 sigaction(SIGQUIT, &sa, nullptr);
67 sigaction(SIGTERM, &sa, nullptr);
68 }
69
main(int,char **)70 int main(int /*argc*/, char** /*argv*/) {
71 // Set up the looper
72 sp<Looper> looper(Looper::prepare(0 /* opts */));
73
74 // Set up the binder
75 ABinderProcess_setThreadPoolMaxThreadCount(9);
76 ABinderProcess_startThreadPool();
77
78 std::shared_ptr<LogEventQueue> eventQueue =
79 std::make_shared<LogEventQueue>(2000 /*buffer limit. Buffer is NOT pre-allocated*/);
80
81 // Create the service
82 gStatsService = SharedRefBase::make<StatsService>(looper, eventQueue);
83 // TODO(b/149582373): Set DUMP_FLAG_PROTO once libbinder_ndk supports
84 // setting dumpsys priorities.
85 binder_status_t status = AServiceManager_addService(gStatsService->asBinder().get(), "stats");
86 if (status != STATUS_OK) {
87 ALOGE("Failed to add service as AIDL service");
88 return -1;
89 }
90
91 registerSignalHandlers();
92
93 gStatsService->sayHiToStatsCompanion();
94
95 gStatsService->Startup();
96
97 gSocketListener = new StatsSocketListener(eventQueue);
98
99 ALOGI("Statsd starts to listen to socket.");
100 // Backlog and /proc/sys/net/unix/max_dgram_qlen set to large value
101 if (gSocketListener->startListener(600)) {
102 exit(1);
103 }
104
105 // Loop forever -- the reports run on this thread in a handler, and the
106 // binder calls remain responsive in their pool of one thread.
107 while (true) {
108 looper->pollAll(-1 /* timeoutMillis */);
109 }
110 ALOGW("statsd escaped from its loop.");
111
112 return 1;
113 }
114