ANR Analysis _anr

Analysis steps

1. __exp_main.txt see that process appears ANR, find the process ID

2. Sys_android_event_log search "Am_anr", if multiple, the process ID obtained through step 1 to distinguish which one is needed, and then can find the corresponding point in time

3. Swt_jbt_traces search appears ANR process ID, if there are multiple stacks, then step 2 to obtain the point of time to confirm which one is needed

Binder Type Analysis Steps

1. __exp_main.txt see that process appears ANR, find the process ID

2. Sys_android_event_log search "Am_anr", if multiple, the process ID obtained through step 1 to distinguish which one is needed, and then can find the corresponding point in time

3. Swt_jbt_traces search appears ANR process ID, if there are multiple stacks, then step 2 to obtain the point of time to confirm which one is needed

4. The word "locked" cannot be found on the stack of Step 3, where the lock may occur at the bn end of the binder.

The process id is searched inside the Sys_binder_info, and the bn end of the communication with the BP end can be found.

5. In the swt_jbt_traces search step 4 Gets the TID, can find the "locked" keyword, find the lock point