tools/testing/selftests/ftrace/test.d/functions

   1
   2 clear_trace() { # reset trace output
   3     echo > trace
   4 }
   5
   6 disable_tracing() { # stop trace recording
   7     echo 0 > tracing_on
   8 }
   9
  10 enable_tracing() { # start trace recording
  11     echo 1 > tracing_on
  12 }
  13
  14 reset_tracer() { # reset the current tracer
  15     echo nop > current_tracer
  16 }
  17
  18 reset_trigger() { # reset all current setting triggers
  19     grep -v ^# events/*/*/trigger |
  20     while read line; do
  21         cmd=`echo $line | cut -f2- -d: | cut -f1 -d" "`
  22         echo "!$cmd" > `echo $line | cut -f1 -d:`
  23     done
  24 }
  25
  26 reset_events_filter() { # reset all current setting filters
  27     grep -v ^none events/*/*/filter |
  28     while read line; do
  29         echo 0 > `echo $line | cut -f1 -d:`
  30     done
  31 }
  32
  33 reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
  34     echo > set_ftrace_filter
  35     grep -v '^#' set_ftrace_filter | while read t; do
  36         tr=`echo $t | cut -d: -f2`
  37         if [ "$tr" = "" ]; then
  38             continue
  39         fi
  40         if ! grep -q "$t" set_ftrace_filter; then
  41                 continue;
  42         fi
  43         name=`echo $t | cut -d: -f1 | cut -d' ' -f1`
  44         if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
  45             tr=`echo $t | cut -d: -f2-4`
  46             limit=`echo $t | cut -d: -f5`
  47         else
  48             tr=`echo $t | cut -d: -f2`
  49             limit=`echo $t | cut -d: -f3`
  50         fi
  51         if [ "$limit" != "unlimited" ]; then
  52             tr="$tr:$limit"
  53         fi
  54         echo "!$name:$tr" > set_ftrace_filter
  55     done
  56 }
  57
  58 disable_events() {
  59     echo 0 > events/enable
  60 }
  61
  62 initialize_ftrace() { # Reset ftrace to initial-state
  63 # As the initial state, ftrace will be set to nop tracer,
  64 # no events, no triggers, no filters, no function filters,
  65 # no probes, and tracing on.
  66     disable_tracing
  67     reset_tracer
  68     reset_trigger
  69     reset_events_filter
  70     disable_events
  71     echo > set_event_pid        # event tracer is always on
  72     [ -f set_ftrace_filter ] && echo | tee set_ftrace_*
  73     [ -f set_graph_function ] && echo | tee set_graph_*
  74     [ -f stack_trace_filter ] && echo > stack_trace_filter
  75     [ -f kprobe_events ] && echo > kprobe_events
  76     [ -f uprobe_events ] && echo > uprobe_events
  77     enable_tracing
  78 }