Android 长时间待机后系统概率性无声

Posted 2022-10-30 虫师魁拔

        之前一个高通平台项目出现这种问题，查看log，发现出现异常的时候，系统 audioserver 挂了，导致 audioserver 挂了log

02-24 10:12:46.724  1041 11824 11824 F DEBUG   : Timestamp: 2022-02-24 10:12:46+0800
02-24 10:12:46.724  1041 11824 11824 F DEBUG   : pid: 921, tid: 2441, name: TimeCheckThread  >>> /system/bin/audioserver <<<
02-24 10:12:46.724  1041 11824 11824 F DEBUG   : uid: 1041
02-24 10:12:46.724  1041 11824 11824 F DEBUG   : signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
02-24 10:12:46.724  1041 11824 11824 F DEBUG   : Abort message: 'TimeCheck timeout for IAudioPolicyService command 27'
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x0  0000000000000000  x1  0000000000000989  x2  0000000000000006  x3  00000076c9347550
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x4  fefefefefefefeff  x5  fefefefefefefeff  x6  fefefefefefefeff  x7  7f7f7f7f7f7f7f7f
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x8  00000000000000f0  x9  1288478ff3ef6c2a  x10 0000000000000000  x11 ffffffc0ffffffdf
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x12 0000000000000001  x13 0000000000000035  x14 0000000000000008  x15 ffffffffffffffff
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x16 00000079cfdf8c80  x17 00000079cfddabb0  x18 00000076c8d6a000  x19 0000000000000399
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x20 0000000000000989  x21 00000000ffffffff  x22 0000000000000000  x23 b4000076eefe29b4
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x24 b4000076eefe29b4  x25 00000076c9347cc0  x26 00000076c9347ff8  x27 00000000000fc000
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     x28 00000076c924f000  x29 00000076c93475d0
02-24 10:12:46.724  1041 11824 11824 F DEBUG   :     lr  00000079cfd8e3e0  sp  00000076c9347530  pc  00000079cfd8e40c  pst 0000000000000000
02-24 10:12:46.739  1041 11824 11824 F DEBUG   : backtrace:
02-24 10:12:46.739  1041 11824 11824 F DEBUG   :       #00 pc 000000000004e40c  /apex/com.android.runtime/lib64/bionic/libc.so (abort+164) (BuildId: f4881cdb04823cc0d8c0fa3f95c4db2e)
02-24 10:12:46.739  1041 11824 11824 F DEBUG   :       #01 pc 00000000000062b0  /system/lib64/liblog.so (__android_log_default_aborter+12) (BuildId: 661d43665d5ec814ec191e5d951fe16a)
02-24 10:12:46.740  1041 11824 11824 F DEBUG   :       #02 pc 0000000000006e18  /system/lib64/liblog.so (__android_log_assert+336) (BuildId: 661d43665d5ec814ec191e5d951fe16a)
02-24 10:12:46.740  1041 11824 11824 F DEBUG   :       #03 pc 000000000002f3b8  /system/lib64/libmediautils.so (android::TimeCheck::TimeCheckThread::threadLoop()+1072) (BuildId: 63bd88e7eae47dcb70566eccec14d02f)
02-24 10:12:46.740  1041 11824 11824 F DEBUG   :       #04 pc 0000000000015594  /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+460) (BuildId: d321d0897f4073bb16c79b0326936ea5)
02-24 10:12:46.740  1041 11824 11824 F DEBUG   :       #05 pc 0000000000014d90  /system/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: d321d0897f4073bb16c79b0326936ea5)
02-24 10:12:46.740  1041 11824 11824 F DEBUG   :       #06 pc 00000000000b008c  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: f4881cdb04823cc0d8c0fa3f95c4db2e)
02-24 10:12:46.740  1041 11824 11824 F DEBUG   :       #07 pc 00000000000503c8  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: f4881cdb04823cc0d8c0fa3f95c4db2e)
02-24 10:12:47.091  1000  1507  2619 I chatty  : uid=1000(system) Thread-14 expire 1 line
02-24 10:12:47.918  1000  1507  1747 I chatty  : uid=1000(system) ActivityManager expire 18 lines

        异常信息中显示 TimeCheck timeout for IAudioPolicyService 。这条log打印原因，是由于TimeCheck 检测超时。在 audioserver 中，对于 audioserver binder 调用不能超过5s，如果超过5s就会打印这个log。TimeCheck 代码位于 frameworks/av/media/utils/TimeCheck.cpp。根据log中超时类型进行区别对待处理，保证不要超时