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