aystshen
commented
4 years ago When do_preview calls uvc_start_streaming_bandwidth() with the following exception:
E/libuvc/stream: [22315*stream.c:1605:uvc_stream_start_bandwidth]:fail
W/libUVCCamera: [22315*diag.c:88:uvc_perror]:failed start_streaming:Unknown error (-99)Calling UVCCamera.close() before will cause Crash:
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'rockchip/rk3288/rk3288:8.1.0/OPM6.171019.030.K1/230314:userdebug/test-keys'
Revision: '0'
ABI: 'arm'
pid: 17899, tid: 18088, name: Timer-1 >>> com.ayst.stresstest <<<
signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
Abort message: 'invalid pthread_t 0x4010409 passed to libc'
r0 00000000 r1 000046a8 r2 00000006 r3 00000008
r4 000045eb r5 000046a8 r6 930fe68c r7 0000010c
r8 00000000 r9 93610a00 sl 00000000 fp 930fe700
ip 930fea00 sp 930fe678 lr afe81a2f pc afe7b43c cpsr 200b0030
d0 2064657300000000 d1 930fe8a000000000
d2 930fe820bd6c8b44 d3 930fe860bf000000
d4 00000001930fe818 d5 aeb712fd930fe8a4
d6 aebf0fc9930fe924 d7 aedf077800000001
d8 0000000000000000 d9 0000000000000000
d10 0000000000000000 d11 0000000000000000
d12 0000000000000000 d13 0000000000000000
d14 0000000000000000 d15 0000000000000000
d16 930ff5b000000000 d17 0000000000000000
d18 0000000000000001 d19 00000000000006d6
d20 000006d6000006d6 d21 0000000000000000
d22 12f08e0012f291c8 d23 131c04a812f3edc8
d24 ffffffffffffffff d25 ffffffffffffffff
d26 ffffffffffffffff d27 ffffffffffffffff
d28 afb96bb0afb96b50 d29 afb96d50afb96ce4
d30 0000000000cc4c12 d31 afb96facafb96e44
scr 20000013
backtrace:
#00 pc 0001a43c /system/lib/libc.so (abort+63)
#01 pc 00048027 /system/lib/libc.so (__pthread_internal_find(long)+94)
#02 pc 000480a9 /system/lib/libc.so (pthread_join+24)
#03 pc 0000ffac /data/app/com.ayst.stresstest-9VxpqIyuPDeuYsQ_paBtbg==/lib/arm/libUVCCamera.so (UVCPreview::stopPreview()+60)
#04 pc 000088c4 /data/app/com.ayst.stresstest-9VxpqIyuPDeuYsQ_paBtbg==/lib/arm/libUVCCamera.so (UVCCamera::stopPreview()+20)
#05 pc 00016d0f /data/app/com.ayst.stresstest-9VxpqIyuPDeuYsQ_paBtbg==/oat/arm/base.odex (offset 0x12000)Position the stack to the code location as follows：
pthread_join(capture_thread, NULL)
int UVCPreview::stopPreview() {
ENTER();
bool b = isRunning();
if (LIKELY(b)) {
mIsRunning = false;
pthread_cond_signal(&preview_sync);
pthread_cond_signal(&capture_sync);
if (pthread_join(capture_thread, NULL) != EXIT_SUCCESS) {
LOGW("UVCPreview::terminate capture thread: pthread_join failed");
}
if (pthread_join(preview_thread, NULL) != EXIT_SUCCESS) {
LOGW("UVCPreview::terminate preview thread: pthread_join failed");
}
clearDisplay();
}
...
}The reasons: The capture_thread was not created because uvc_start_streaming_bandwidth returned an error.
void UVCPreview::do_preview(uvc_stream_ctrl_t *ctrl) {
ENTER();
uvc_frame_t *frame = NULL;
uvc_frame_t *frame_mjpeg = NULL;
uvc_error_t result = uvc_start_streaming_bandwidth(
mDeviceHandle, ctrl, uvc_preview_frame_callback, (void *)this, requestBandwidth, 0);
if (LIKELY(!result)) {
clearPreviewFrame();
pthread_create(&capture_thread, NULL, capture_thread_func, (void *)this);
...
}
2019-10-10 16:46:27.046 15178-15335/? A/libc: invalid pthread_t 0x4010409 passed to libc 2019-10-10 16:46:27.046 15178-15335/? A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 15335 (Timer-1), pid 15178 (ayst.stresstest) 2019-10-10 16:46:27.170 20908-20908/? I/crash_dump32: obtaining output fd from tombstoned, type: kDebuggerdTombstone 2019-10-10 16:46:27.171 352-352/? I//system/bin/tombstoned: received crash request for pid 15178 2019-10-10 16:46:27.171 20908-20908/? I/crash_dump32: performing dump of process 15178 (target tid = 15335) 2019-10-10 16:46:27.171 20908-20908/? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 2019-10-10 16:46:27.172 20908-20908/? A/DEBUG: Build fingerprint: 'rockchip/rk3288/rk3288:8.1.0/OPM6.171019.030.K1/141052:userdebug/test-keys' 2019-10-10 16:46:27.172 20908-20908/? A/DEBUG: Revision: '0' 2019-10-10 16:46:27.172 20908-20908/? A/DEBUG: ABI: 'arm' 2019-10-10 16:46:27.172 20908-20908/? A/DEBUG: pid: 15178, tid: 15335, name: Timer-1 >>> com.ayst.stresstest <<< 2019-10-10 16:46:27.172 20908-20908/? A/DEBUG: signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr -------- 2019-10-10 16:46:27.177 20908-20908/? A/DEBUG: Abort message: 'invalid pthread_t 0x4010409 passed to libc' 2019-10-10 16:46:27.177 20908-20908/? A/DEBUG: r0 00000000 r1 00003be7 r2 00000006 r3 00000008 2019-10-10 16:46:27.177 20908-20908/? A/DEBUG: r4 00003b4a r5 00003be7 r6 8ab7e974 r7 0000010c 2019-10-10 16:46:27.177 20908-20908/? A/DEBUG: r8 00000000 r9 8b00fe00 sl 00000000 fp 8ab7ea7c 2019-10-10 16:46:27.177 20908-20908/? A/DEBUG: ip 8ab7ecd8 sp 8ab7e960 lr a7282a2f pc a727c43c cpsr 20030030 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: backtrace: 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: #00 pc 0001a43c /system/lib/libc.so (abort+63) 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: #01 pc 00048027 /system/lib/libc.so (__pthread_internal_find(long)+94) 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: #02 pc 000480a9 /system/lib/libc.so (pthread_join+24) 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: #03 pc 0000eed0 /data/app/com.ayst.stresstest-WDheUqEUEOWXgF76IiWuAQ==/lib/arm/libUVCCamera.so (UVCPreview::stopPreview()+56) 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: #04 pc 000072b4 /data/app/com.ayst.stresstest-WDheUqEUEOWXgF76IiWuAQ==/lib/arm/libUVCCamera.so (UVCCamera::stopPreview()+16) 2019-10-10 16:46:27.182 20908-20908/? A/DEBUG: #05 pc 0000a3ef /data/app/com.ayst.stresstest-WDheUqEUEOWXgF76IiWuAQ==/oat/arm/base.odex (offset 0xa000)