Issue
In Android OS source code (Path: /drivers/staging/android/binder_trace.h), we have a file named binder_trace.h and also in /drivers/staging/android/binder.c binder_trace is included. As we can see in binder_trace.h file, the binder transactions are traced with TP_printk instruction.
Now my question is that how I can see these kernel logs in my phone with adb shell? Also there isn't any file related to binder tracing in /sys/kernel/debug/tracing directory!
Solution
$ cd /sys/kernel/debug/tracing
$ echo > set_event # clear all unrelated events
$ echo 1 > events/binder/enable
$ echo 1 > tracing_on
# .. do your test jobs ..
$ cat trace
refer to https://android.googlesource.com/kernel/common/+/android-3.10.y/Documentation/trace/ftrace.txt for more detail info.
Answered By - Yingchun Answer Checked By - Marilyn (WPSolving Volunteer)