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
37 using namespace android;
38
main(int argc __unused,char ** argv)39 int 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