1/*
2 * Copyright (C) 2015 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 LOG_TAG "audioserver"
18//#define LOG_NDEBUG 0
19
20#include <fcntl.h>
21#include <sys/prctl.h>
22#include <sys/wait.h>
23#include <cutils/properties.h>
24
25#include <binder/IPCThreadState.h>
26#include <binder/ProcessState.h>
27#include <binder/IServiceManager.h>
28#include <utils/Log.h>
29
30// from LOCAL_C_INCLUDES
31#include "AudioFlinger.h"
32#include "AudioPolicyService.h"
33#include "MediaLogService.h"
34#include "RadioService.h"
35#include "SoundTriggerHwService.h"
36
37using namespace android;
38
39int main(int argc __unused, char **argv)
40{
41    signal(SIGPIPE, SIG_IGN);
42
43    bool doLog = (bool) property_get_bool("ro.test_harness", 0);
44
45    pid_t childPid;
46    // FIXME The advantage of making the process containing media.log service the parent process of
47    // the process that contains the other audio services, is that it allows us to collect more
48    // detailed information such as signal numbers, stop and continue, resource usage, etc.
49    // But it is also more complex.  Consider replacing this by independent processes, and using
50    // binder on death notification instead.
51    if (doLog && (childPid = fork()) != 0) {
52        // media.log service
53        //prctl(PR_SET_NAME, (unsigned long) "media.log", 0, 0, 0);
54        // unfortunately ps ignores PR_SET_NAME for the main thread, so use this ugly hack
55        strcpy(argv[0], "media.log");
56        sp<ProcessState> proc(ProcessState::self());
57        MediaLogService::instantiate();
58        ProcessState::self()->startThreadPool();
59        IPCThreadState::self()->joinThreadPool();
60        for (;;) {
61            siginfo_t info;
62            int ret = waitid(P_PID, childPid, &info, WEXITED | WSTOPPED | WCONTINUED);
63            if (ret == EINTR) {
64                continue;
65            }
66            if (ret < 0) {
67                break;
68            }
69            char buffer[32];
70            const char *code;
71            switch (info.si_code) {
72            case CLD_EXITED:
73                code = "CLD_EXITED";
74                break;
75            case CLD_KILLED:
76                code = "CLD_KILLED";
77                break;
78            case CLD_DUMPED:
79                code = "CLD_DUMPED";
80                break;
81            case CLD_STOPPED:
82                code = "CLD_STOPPED";
83                break;
84            case CLD_TRAPPED:
85                code = "CLD_TRAPPED";
86                break;
87            case CLD_CONTINUED:
88                code = "CLD_CONTINUED";
89                break;
90            default:
91                snprintf(buffer, sizeof(buffer), "unknown (%d)", info.si_code);
92                code = buffer;
93                break;
94            }
95            struct rusage usage;
96            getrusage(RUSAGE_CHILDREN, &usage);
97            ALOG(LOG_ERROR, "media.log", "pid %d status %d code %s user %ld.%03lds sys %ld.%03lds",
98                    info.si_pid, info.si_status, code,
99                    usage.ru_utime.tv_sec, usage.ru_utime.tv_usec / 1000,
100                    usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 1000);
101            sp<IServiceManager> sm = defaultServiceManager();
102            sp<IBinder> binder = sm->getService(String16("media.log"));
103            if (binder != 0) {
104                Vector<String16> args;
105                binder->dump(-1, args);
106            }
107            switch (info.si_code) {
108            case CLD_EXITED:
109            case CLD_KILLED:
110            case CLD_DUMPED: {
111                ALOG(LOG_INFO, "media.log", "exiting");
112                _exit(0);
113                // not reached
114                }
115            default:
116                break;
117            }
118        }
119    } else {
120        // all other services
121        if (doLog) {
122            prctl(PR_SET_PDEATHSIG, SIGKILL);   // if parent media.log dies before me, kill me also
123            setpgid(0, 0);                      // but if I die first, don't kill my parent
124        }
125        sp<ProcessState> proc(ProcessState::self());
126        sp<IServiceManager> sm = defaultServiceManager();
127        ALOGI("ServiceManager: %p", sm.get());
128        AudioFlinger::instantiate();
129        AudioPolicyService::instantiate();
130        RadioService::instantiate();
131        SoundTriggerHwService::instantiate();
132        ProcessState::self()->startThreadPool();
133        IPCThreadState::self()->joinThreadPool();
134    }
135}
136