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 "aaudio/AAudioTesting.h"
36 #include "AudioFlinger.h"
37 #include "AudioPolicyService.h"
38 #include "AAudioService.h"
39 #include "utility/AAudioUtilities.h"
40 #include "MediaLogService.h"
41 #include "SoundTriggerHwService.h"
42
43 using namespace android;
44
main(int argc __unused,char ** argv)45 int main(int argc __unused, char **argv)
46 {
47 signal(SIGPIPE, SIG_IGN);
48
49 bool doLog = (bool) property_get_bool("ro.test_harness", 0);
50
51 pid_t childPid;
52 // FIXME The advantage of making the process containing media.log service the parent process of
53 // the process that contains the other audio services, is that it allows us to collect more
54 // detailed information such as signal numbers, stop and continue, resource usage, etc.
55 // But it is also more complex. Consider replacing this by independent processes, and using
56 // binder on death notification instead.
57 if (doLog && (childPid = fork()) != 0) {
58 // media.log service
59 //prctl(PR_SET_NAME, (unsigned long) "media.log", 0, 0, 0);
60 // unfortunately ps ignores PR_SET_NAME for the main thread, so use this ugly hack
61 strcpy(argv[0], "media.log");
62 sp<ProcessState> proc(ProcessState::self());
63 MediaLogService::instantiate();
64 ProcessState::self()->startThreadPool();
65 IPCThreadState::self()->joinThreadPool();
66 for (;;) {
67 siginfo_t info;
68 int ret = waitid(P_PID, childPid, &info, WEXITED | WSTOPPED | WCONTINUED);
69 if (ret == EINTR) {
70 continue;
71 }
72 if (ret < 0) {
73 break;
74 }
75 char buffer[32];
76 const char *code;
77 switch (info.si_code) {
78 case CLD_EXITED:
79 code = "CLD_EXITED";
80 break;
81 case CLD_KILLED:
82 code = "CLD_KILLED";
83 break;
84 case CLD_DUMPED:
85 code = "CLD_DUMPED";
86 break;
87 case CLD_STOPPED:
88 code = "CLD_STOPPED";
89 break;
90 case CLD_TRAPPED:
91 code = "CLD_TRAPPED";
92 break;
93 case CLD_CONTINUED:
94 code = "CLD_CONTINUED";
95 break;
96 default:
97 snprintf(buffer, sizeof(buffer), "unknown (%d)", info.si_code);
98 code = buffer;
99 break;
100 }
101 struct rusage usage;
102 getrusage(RUSAGE_CHILDREN, &usage);
103 ALOG(LOG_ERROR, "media.log", "pid %d status %d code %s user %ld.%03lds sys %ld.%03lds",
104 info.si_pid, info.si_status, code,
105 usage.ru_utime.tv_sec, usage.ru_utime.tv_usec / 1000,
106 usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 1000);
107 sp<IServiceManager> sm = defaultServiceManager();
108 sp<IBinder> binder = sm->getService(String16("media.log"));
109 if (binder != 0) {
110 Vector<String16> args;
111 binder->dump(-1, args);
112 }
113 switch (info.si_code) {
114 case CLD_EXITED:
115 case CLD_KILLED:
116 case CLD_DUMPED: {
117 ALOG(LOG_INFO, "media.log", "exiting");
118 _exit(0);
119 // not reached
120 }
121 default:
122 break;
123 }
124 }
125 } else {
126 // all other services
127 if (doLog) {
128 prctl(PR_SET_PDEATHSIG, SIGKILL); // if parent media.log dies before me, kill me also
129 setpgid(0, 0); // but if I die first, don't kill my parent
130 }
131 sp<ProcessState> proc(ProcessState::self());
132 sp<IServiceManager> sm = defaultServiceManager();
133 ALOGI("ServiceManager: %p", sm.get());
134 AudioFlinger::instantiate();
135 AudioPolicyService::instantiate();
136
137 // AAudioService should only be used in OC-MR1 and later.
138 // And only enable the AAudioService if the system MMAP policy explicitly allows it.
139 // This prevents a client from misusing AAudioService when it is not supported.
140 aaudio_policy_t mmapPolicy = property_get_int32(AAUDIO_PROP_MMAP_POLICY,
141 AAUDIO_POLICY_NEVER);
142 if (mmapPolicy == AAUDIO_POLICY_AUTO || mmapPolicy == AAUDIO_POLICY_ALWAYS) {
143 AAudioService::instantiate();
144 }
145
146 SoundTriggerHwService::instantiate();
147 ProcessState::self()->startThreadPool();
148
149 // FIXME: remove when BUG 31748996 is fixed
150 android::hardware::ProcessState::self()->startThreadPool();
151
152 IPCThreadState::self()->joinThreadPool();
153 }
154 }
155