tools/testing/selftests/bpf/test_ftrace.sh

   1 #!/bin/bash
   2
   3 if [[ -e /sys/kernel/tracing/trace ]]; then
   4     TR=/sys/kernel/tracing/
   5 else
   6     TR=/sys/kernel/debug/tracing/
   7 fi
   8
   9 clear_trace() { # reset trace output
  10     echo > $TR/trace
  11 }
  12
  13 disable_tracing() { # stop trace recording
  14     echo 0 > $TR/tracing_on
  15 }
  16
  17 enable_tracing() { # start trace recording
  18     echo 1 > $TR/tracing_on
  19 }
  20
  21 reset_tracer() { # reset the current tracer
  22     echo nop > $TR/current_tracer
  23 }
  24
  25 disable_tracing
  26 clear_trace
  27
  28 echo "" > $TR/set_ftrace_filter
  29 echo '*printk* *console* *wake* *serial* *lock*' > $TR/set_ftrace_notrace
  30
  31 echo "bpf_prog_test*" > $TR/set_graph_function
  32 echo "" > $TR/set_graph_notrace
  33
  34 echo function_graph > $TR/current_tracer
  35
  36 enable_tracing
  37 ./test_progs -t fentry
  38 ./test_progs -t fexit
  39 disable_tracing
  40 clear_trace
  41
  42 reset_tracer
  43
  44 exit 0