main_mediaserver.cpp revision 67e7f543c7f1c4fe4ee1989ceb0aebe44a63b49e 
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 "ResourceManagerService.h"
37#include "service/AudioPolicyService.h"
38#include "SoundTriggerHwService.h"
39#include "RadioService.h"
40
41using namespace android;
42
43int main(int argc __unused, char** argv)
44{
45    signal(SIGPIPE, SIG_IGN);
46    char value[PROPERTY_VALUE_MAX];
47    bool doLog = (property_get("ro.test_harness", value, "0") > 0) && (atoi(value) == 1);
48    pid_t childPid;
49    // FIXME The advantage of making the process containing media.log service the parent process of
50    // the process that contains all the other real services, is that it allows us to collect more
51    // detailed information such as signal numbers, stop and continue, resource usage, etc.
52    // But it is also more complex.  Consider replacing this by independent processes, and using
53    // binder on death notification instead.
54    if (doLog && (childPid = fork()) != 0) {
55        // media.log service
56        //prctl(PR_SET_NAME, (unsigned long) "media.log", 0, 0, 0);
57        // unfortunately ps ignores PR_SET_NAME for the main thread, so use this ugly hack
58        strcpy(argv[0], "media.log");
59        sp<ProcessState> proc(ProcessState::self());
60        MediaLogService::instantiate();
61        ProcessState::self()->startThreadPool();
62        for (;;) {
63            siginfo_t info;
64            int ret = waitid(P_PID, childPid, &info, WEXITED | WSTOPPED | WCONTINUED);
65            if (ret == EINTR) {
66                continue;
67            }
68            if (ret < 0) {
69                break;
70            }
71            char buffer[32];
72            const char *code;
73            switch (info.si_code) {
74            case CLD_EXITED:
75                code = "CLD_EXITED";
76                break;
77            case CLD_KILLED:
78                code = "CLD_KILLED";
79                break;
80            case CLD_DUMPED:
81                code = "CLD_DUMPED";
82                break;
83            case CLD_STOPPED:
84                code = "CLD_STOPPED";
85                break;
86            case CLD_TRAPPED:
87                code = "CLD_TRAPPED";
88                break;
89            case CLD_CONTINUED:
90                code = "CLD_CONTINUED";
91                break;
92            default:
93                snprintf(buffer, sizeof(buffer), "unknown (%d)", info.si_code);
94                code = buffer;
95                break;
96            }
97            struct rusage usage;
98            getrusage(RUSAGE_CHILDREN, &usage);
99            ALOG(LOG_ERROR, "media.log", "pid %d status %d code %s user %ld.%03lds sys %ld.%03lds",
100                    info.si_pid, info.si_status, code,
101                    usage.ru_utime.tv_sec, usage.ru_utime.tv_usec / 1000,
102                    usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 1000);
103            sp<IServiceManager> sm = defaultServiceManager();
104            sp<IBinder> binder = sm->getService(String16("media.log"));
105            if (binder != 0) {
106                Vector<String16> args;
107                binder->dump(-1, args);
108            }
109            switch (info.si_code) {
110            case CLD_EXITED:
111            case CLD_KILLED:
112            case CLD_DUMPED: {
113                ALOG(LOG_INFO, "media.log", "exiting");
114                _exit(0);
115                // not reached
116                }
117            default:
118                break;
119            }
120        }
121    } else {
122        // all other services
123        if (doLog) {
124            prctl(PR_SET_PDEATHSIG, SIGKILL);   // if parent media.log dies before me, kill me also
125            setpgid(0, 0);                      // but if I die first, don't kill my parent
126        }
127        sp<ProcessState> proc(ProcessState::self());
128        sp<IServiceManager> sm = defaultServiceManager();
129        ALOGI("ServiceManager: %p", sm.get());
130        AudioFlinger::instantiate();
131        MediaPlayerService::instantiate();
132        ResourceManagerService::instantiate();
133        CameraService::instantiate();
134        AudioPolicyService::instantiate();
135        SoundTriggerHwService::instantiate();
136        RadioService::instantiate();
137        registerExtensions();
138        ProcessState::self()->startThreadPool();
139        IPCThreadState::self()->joinThreadPool();
140    }
141}
142