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#!/bin/bash
TR=/sys/kernel/debug/tracing/
clear_trace() { # reset trace output
echo > $TR/trace
}
disable_tracing() { # stop trace recording
echo 0 > $TR/tracing_on
}
enable_tracing() { # start trace recording
echo 1 > $TR/tracing_on
}
reset_tracer() { # reset the current tracer
echo nop > $TR/current_tracer
}
disable_tracing
clear_trace
echo "" > $TR/set_ftrace_filter
echo '*printk* *console* *wake* *serial* *lock*' > $TR/set_ftrace_notrace
echo "bpf_prog_test*" > $TR/set_graph_function
echo "" > $TR/set_graph_notrace
echo function_graph > $TR/current_tracer
enable_tracing
./test_progs -t fentry
./test_progs -t fexit
disable_tracing
clear_trace
reset_tracer
exit 0