tools/testing/selftests/bpf/test_ftrace.sh

   1 #!/bin/bash
   2
   3 TR=/sys/kernel/debug/tracing/
   4 clear_trace() { # reset trace output
   5     echo > $TR/trace
   6 }
   7
   8 disable_tracing() { # stop trace recording
   9     echo 0 > $TR/tracing_on
  10 }
  11
  12 enable_tracing() { # start trace recording
  13     echo 1 > $TR/tracing_on
  14 }
  15
  16 reset_tracer() { # reset the current tracer
  17     echo nop > $TR/current_tracer
  18 }
  19
  20 disable_tracing
  21 clear_trace
  22
  23 echo "" > $TR/set_ftrace_filter
  24 echo '*printk* *console* *wake* *serial* *lock*' > $TR/set_ftrace_notrace
  25
  26 echo "bpf_prog_test*" > $TR/set_graph_function
  27 echo "" > $TR/set_graph_notrace
  28
  29 echo function_graph > $TR/current_tracer
  30
  31 enable_tracing
  32 ./test_progs -t fentry
  33 ./test_progs -t fexit
  34 disable_tracing
  35 clear_trace
  36
  37 reset_tracer
  38
  39 exit 0