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