main_mediaserver.cpp revision 4e09069a29fc18d0799808cc26f71e9b068e98ad 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "mediaserver"
19//#define LOG_NDEBUG 0
20
21#include <fcntl.h>
22#include <sys/prctl.h>
23#include <sys/wait.h>
24#include <binder/IPCThreadState.h>
25#include <binder/ProcessState.h>
26#include <binder/IServiceManager.h>
27#include <cutils/properties.h>
28#include <utils/Log.h>
29#include "RegisterExtensions.h"
30
31// from LOCAL_C_INCLUDES
32#include "AudioFlinger.h"
33#include "CameraService.h"
34#include "MediaLogService.h"
35#include "MediaPlayerService.h"
36#include "service/AudioPolicyService.h"
37#include "SoundTriggerHwService.h"
38#include "RadioService.h"
39
40using namespace android;
41
42int main(int argc __unused, char** argv)
43{
44    signal(SIGPIPE, SIG_IGN);
45    char value[PROPERTY_VALUE_MAX];
46    bool doLog = (property_get("ro.test_harness", value, "0") > 0) && (atoi(value) == 1);
47    pid_t childPid;
48    // FIXME The advantage of making the process containing media.log service the parent process of
49    // the process that contains all the other real services, is that it allows us to collect more
50    // detailed information such as signal numbers, stop and continue, resource usage, etc.
51    // But it is also more complex.  Consider replacing this by independent processes, and using
52    // binder on death notification instead.
53    if (doLog && (childPid = fork()) != 0) {
54        // media.log service
55        //prctl(PR_SET_NAME, (unsigned long) "media.log", 0, 0, 0);
56        // unfortunately ps ignores PR_SET_NAME for the main thread, so use this ugly hack
57        strcpy(argv[0], "media.log");
58        sp<ProcessState> proc(ProcessState::self());
59        MediaLogService::instantiate();
60        ProcessState::self()->startThreadPool();
61        for (;;) {
62            siginfo_t info;
63            int ret = waitid(P_PID, childPid, &info, WEXITED | WSTOPPED | WCONTINUED);
64            if (ret == EINTR) {
65                continue;
66            }
67            if (ret < 0) {
68                break;
69            }
70            char buffer[32];
71            const char *code;
72            switch (info.si_code) {
73            case CLD_EXITED:
74                code = "CLD_EXITED";
75                break;
76            case CLD_KILLED:
77                code = "CLD_KILLED";
78                break;
79            case CLD_DUMPED:
80                code = "CLD_DUMPED";
81                break;
82            case CLD_STOPPED:
83                code = "CLD_STOPPED";
84                break;
85            case CLD_TRAPPED:
86                code = "CLD_TRAPPED";
87                break;
88            case CLD_CONTINUED:
89                code = "CLD_CONTINUED";
90                break;
91            default:
92                snprintf(buffer, sizeof(buffer), "unknown (%d)", info.si_code);
93                code = buffer;
94                break;
95            }
96            struct rusage usage;
97            getrusage(RUSAGE_CHILDREN, &usage);
98            ALOG(LOG_ERROR, "media.log", "pid %d status %d code %s user %ld.%03lds sys %ld.%03lds",
99                    info.si_pid, info.si_status, code,
100                    usage.ru_utime.tv_sec, usage.ru_utime.tv_usec / 1000,
101                    usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 1000);
102            sp<IServiceManager> sm = defaultServiceManager();
103            sp<IBinder> binder = sm->getService(String16("media.log"));
104            if (binder != 0) {
105                Vector<String16> args;
106                binder->dump(-1, args);
107            }
108            switch (info.si_code) {
109            case CLD_EXITED:
110            case CLD_KILLED:
111            case CLD_DUMPED: {
112                ALOG(LOG_INFO, "media.log", "exiting");
113                _exit(0);
114                // not reached
115                }
116            default:
117                break;
118            }
119        }
120    } else {
121        // all other services
122        if (doLog) {
123            prctl(PR_SET_PDEATHSIG, SIGKILL);   // if parent media.log dies before me, kill me also
124            setpgid(0, 0);                      // but if I die first, don't kill my parent
125        }
126        sp<ProcessState> proc(ProcessState::self());
127        sp<IServiceManager> sm = defaultServiceManager();
128        ALOGI("ServiceManager: %p", sm.get());
129        AudioFlinger::instantiate();
130        MediaPlayerService::instantiate();
131        CameraService::instantiate();
132        AudioPolicyService::instantiate();
133        SoundTriggerHwService::instantiate();
134        RadioService::instantiate();
135        registerExtensions();
136        ProcessState::self()->startThreadPool();
137        IPCThreadState::self()->joinThreadPool();
138    }
139}
140