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 <hidl/HidlTransportSupport.h>
29 #include <utils/Log.h>
30
31 // from LOCAL_C_INCLUDES
32 #include "aaudio/AAudioTesting.h"
33 #include "AudioFlinger.h"
34 #include "AudioPolicyService.h"
35 #include "AAudioService.h"
36 #include "utility/AAudioUtilities.h"
37 #include "MediaLogService.h"
38 #include "MediaUtils.h"
39 #include "SoundTriggerHwService.h"
40
41 using namespace android;
42
main(int argc __unused,char ** argv)43 int main(int argc __unused, char **argv)
44 {
45 // TODO: update with refined parameters
46 limitProcessMemory(
47 "audio.maxmem", /* "ro.audio.maxmem", property that defines limit */
48 (size_t)512 * (1 << 20), /* SIZE_MAX, upper limit in bytes */
49 20 /* upper limit as percentage of physical RAM */);
50
51 signal(SIGPIPE, SIG_IGN);
52
53 bool doLog = (bool) property_get_bool("ro.test_harness", 0);
54
55 pid_t childPid;
56 // FIXME The advantage of making the process containing media.log service the parent process of
57 // the process that contains the other audio services, is that it allows us to collect more
58 // detailed information such as signal numbers, stop and continue, resource usage, etc.
59 // But it is also more complex. Consider replacing this by independent processes, and using
60 // binder on death notification instead.
61 if (doLog && (childPid = fork()) != 0) {
62 // media.log service
63 //prctl(PR_SET_NAME, (unsigned long) "media.log", 0, 0, 0);
64 // unfortunately ps ignores PR_SET_NAME for the main thread, so use this ugly hack
65 strcpy(argv[0], "media.log");
66 sp<ProcessState> proc(ProcessState::self());
67 MediaLogService::instantiate();
68 ProcessState::self()->startThreadPool();
69 IPCThreadState::self()->joinThreadPool();
70 for (;;) {
71 siginfo_t info;
72 int ret = waitid(P_PID, childPid, &info, WEXITED | WSTOPPED | WCONTINUED);
73 if (ret == EINTR) {
74 continue;
75 }
76 if (ret < 0) {
77 break;
78 }
79 char buffer[32];
80 const char *code;
81 switch (info.si_code) {
82 case CLD_EXITED:
83 code = "CLD_EXITED";
84 break;
85 case CLD_KILLED:
86 code = "CLD_KILLED";
87 break;
88 case CLD_DUMPED:
89 code = "CLD_DUMPED";
90 break;
91 case CLD_STOPPED:
92 code = "CLD_STOPPED";
93 break;
94 case CLD_TRAPPED:
95 code = "CLD_TRAPPED";
96 break;
97 case CLD_CONTINUED:
98 code = "CLD_CONTINUED";
99 break;
100 default:
101 snprintf(buffer, sizeof(buffer), "unknown (%d)", info.si_code);
102 code = buffer;
103 break;
104 }
105 struct rusage usage;
106 getrusage(RUSAGE_CHILDREN, &usage);
107 ALOG(LOG_ERROR, "media.log", "pid %d status %d code %s user %ld.%03lds sys %ld.%03lds",
108 info.si_pid, info.si_status, code,
109 usage.ru_utime.tv_sec, usage.ru_utime.tv_usec / 1000,
110 usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 1000);
111 sp<IServiceManager> sm = defaultServiceManager();
112 sp<IBinder> binder = sm->getService(String16("media.log"));
113 if (binder != 0) {
114 Vector<String16> args;
115 binder->dump(-1, args);
116 }
117 switch (info.si_code) {
118 case CLD_EXITED:
119 case CLD_KILLED:
120 case CLD_DUMPED: {
121 ALOG(LOG_INFO, "media.log", "exiting");
122 _exit(0);
123 // not reached
124 }
125 default:
126 break;
127 }
128 }
129 } else {
130 // all other services
131 if (doLog) {
132 prctl(PR_SET_PDEATHSIG, SIGKILL); // if parent media.log dies before me, kill me also
133 setpgid(0, 0); // but if I die first, don't kill my parent
134 }
135 android::hardware::configureRpcThreadpool(4, false /*callerWillJoin*/);
136 sp<ProcessState> proc(ProcessState::self());
137 sp<IServiceManager> sm = defaultServiceManager();
138 ALOGI("ServiceManager: %p", sm.get());
139 AudioFlinger::instantiate();
140 AudioPolicyService::instantiate();
141
142 // AAudioService should only be used in OC-MR1 and later.
143 // And only enable the AAudioService if the system MMAP policy explicitly allows it.
144 // This prevents a client from misusing AAudioService when it is not supported.
145 aaudio_policy_t mmapPolicy = property_get_int32(AAUDIO_PROP_MMAP_POLICY,
146 AAUDIO_POLICY_NEVER);
147 if (mmapPolicy == AAUDIO_POLICY_AUTO || mmapPolicy == AAUDIO_POLICY_ALWAYS) {
148 AAudioService::instantiate();
149 }
150
151 SoundTriggerHwService::instantiate();
152 ProcessState::self()->startThreadPool();
153 IPCThreadState::self()->joinThreadPool();
154 }
155 }
156