main_audioserver.cpp revision 88724633820406638b217656625e92afc78e6d82 
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// FIXME: remove when BUG 31748996 is fixed
31#include <hwbinder/IPCThreadState.h>
32#include <hwbinder/ProcessState.h>
33
34// from LOCAL_C_INCLUDES
35#include "AudioFlinger.h"
36#include "AudioPolicyService.h"
37#include "AAudioService.h"
38#include "MediaLogService.h"
39#include "SoundTriggerHwService.h"
40
41using namespace android;
42
43int main(int argc __unused, char **argv)
44{
45    signal(SIGPIPE, SIG_IGN);
46
47    bool doLog = (bool) property_get_bool("ro.test_harness", 0);
48
49    pid_t childPid;
50    // FIXME The advantage of making the process containing media.log service the parent process of
51    // the process that contains the other audio services, is that it allows us to collect more
52    // detailed information such as signal numbers, stop and continue, resource usage, etc.
53    // But it is also more complex.  Consider replacing this by independent processes, and using
54    // binder on death notification instead.
55    if (doLog && (childPid = fork()) != 0) {
56        // media.log service
57        //prctl(PR_SET_NAME, (unsigned long) "media.log", 0, 0, 0);
58        // unfortunately ps ignores PR_SET_NAME for the main thread, so use this ugly hack
59        strcpy(argv[0], "media.log");
60        sp<ProcessState> proc(ProcessState::self());
61        MediaLogService::instantiate();
62        ProcessState::self()->startThreadPool();
63        IPCThreadState::self()->joinThreadPool();
64        for (;;) {
65            siginfo_t info;
66            int ret = waitid(P_PID, childPid, &info, WEXITED | WSTOPPED | WCONTINUED);
67            if (ret == EINTR) {
68                continue;
69            }
70            if (ret < 0) {
71                break;
72            }
73            char buffer[32];
74            const char *code;
75            switch (info.si_code) {
76            case CLD_EXITED:
77                code = "CLD_EXITED";
78                break;
79            case CLD_KILLED:
80                code = "CLD_KILLED";
81                break;
82            case CLD_DUMPED:
83                code = "CLD_DUMPED";
84                break;
85            case CLD_STOPPED:
86                code = "CLD_STOPPED";
87                break;
88            case CLD_TRAPPED:
89                code = "CLD_TRAPPED";
90                break;
91            case CLD_CONTINUED:
92                code = "CLD_CONTINUED";
93                break;
94            default:
95                snprintf(buffer, sizeof(buffer), "unknown (%d)", info.si_code);
96                code = buffer;
97                break;
98            }
99            struct rusage usage;
100            getrusage(RUSAGE_CHILDREN, &usage);
101            ALOG(LOG_ERROR, "media.log", "pid %d status %d code %s user %ld.%03lds sys %ld.%03lds",
102                    info.si_pid, info.si_status, code,
103                    usage.ru_utime.tv_sec, usage.ru_utime.tv_usec / 1000,
104                    usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 1000);
105            sp<IServiceManager> sm = defaultServiceManager();
106            sp<IBinder> binder = sm->getService(String16("media.log"));
107            if (binder != 0) {
108                Vector<String16> args;
109                binder->dump(-1, args);
110            }
111            switch (info.si_code) {
112            case CLD_EXITED:
113            case CLD_KILLED:
114            case CLD_DUMPED: {
115                ALOG(LOG_INFO, "media.log", "exiting");
116                _exit(0);
117                // not reached
118                }
119            default:
120                break;
121            }
122        }
123    } else {
124        // all other services
125        if (doLog) {
126            prctl(PR_SET_PDEATHSIG, SIGKILL);   // if parent media.log dies before me, kill me also
127            setpgid(0, 0);                      // but if I die first, don't kill my parent
128        }
129        sp<ProcessState> proc(ProcessState::self());
130        sp<IServiceManager> sm = defaultServiceManager();
131        ALOGI("ServiceManager: %p", sm.get());
132        AudioFlinger::instantiate();
133        AudioPolicyService::instantiate();
134        AAudioService::instantiate();
135        SoundTriggerHwService::instantiate();
136        ProcessState::self()->startThreadPool();
137
138// FIXME: remove when BUG 31748996 is fixed
139        android::hardware::ProcessState::self()->startThreadPool();
140
141        IPCThreadState::self()->joinThreadPool();
142    }
143}
144