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_file() {
  19     # remove action triggers first
  20     grep -H ':on[^:]*(' $@ |
  21     while read line; do
  22         cmd=`echo $line | cut -f2- -d: | cut -f1 -d" "`
  23         file=`echo $line | cut -f1 -d:`
  24         echo "!$cmd" >> $file
  25     done
  26     grep -Hv ^# $@ |
  27     while read line; do
  28         cmd=`echo $line | cut -f2- -d: | cut -f1 -d" "`
  29         file=`echo $line | cut -f1 -d:`
  30         echo "!$cmd" > $file
  31     done
  32 }
  33
  34 reset_trigger() { # reset all current setting triggers
  35     if [ -d events/synthetic ]; then
  36         reset_trigger_file events/synthetic/*/trigger
  37     fi
  38     reset_trigger_file events/*/*/trigger
  39 }
  40
  41 reset_events_filter() { # reset all current setting filters
  42     grep -v ^none events/*/*/filter |
  43     while read line; do
  44         echo 0 > `echo $line | cut -f1 -d:`
  45     done
  46 }
  47
  48 reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
  49     echo > set_ftrace_filter
  50     grep -v '^#' set_ftrace_filter | while read t; do
  51         tr=`echo $t | cut -d: -f2`
  52         if [ "$tr" = "" ]; then
  53             continue
  54         fi
  55         if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
  56             tr=`echo $t | cut -d: -f1-4`
  57             limit=`echo $t | cut -d: -f5`
  58         else
  59             tr=`echo $t | cut -d: -f1-2`
  60             limit=`echo $t | cut -d: -f3`
  61         fi
  62         if [ "$limit" != "unlimited" ]; then
  63             tr="$tr:$limit"
  64         fi
  65         echo "!$tr" > set_ftrace_filter
  66     done
  67 }
  68
  69 disable_events() {
  70     echo 0 > events/enable
  71 }
  72
  73 initialize_ftrace() { # Reset ftrace to initial-state
  74 # As the initial state, ftrace will be set to nop tracer,
  75 # no events, no triggers, no filters, no function filters,
  76 # no probes, and tracing on.
  77     disable_tracing
  78     reset_tracer
  79     reset_trigger
  80     reset_events_filter
  81     disable_events
  82     echo > set_event_pid        # event tracer is always on
  83     [ -f set_ftrace_filter ] && echo | tee set_ftrace_*
  84     [ -f set_graph_function ] && echo | tee set_graph_*
  85     [ -f stack_trace_filter ] && echo > stack_trace_filter
  86     [ -f kprobe_events ] && echo > kprobe_events
  87     [ -f uprobe_events ] && echo > uprobe_events
  88     enable_tracing
  89 }