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- # SPDX-License-Identifier: GPL-2.0-only
- clear_trace() { # reset trace output
- echo > trace
- }
- disable_tracing() { # stop trace recording
- echo 0 > tracing_on
- }
- enable_tracing() { # start trace recording
- echo 1 > tracing_on
- }
- reset_tracer() { # reset the current tracer
- echo nop > current_tracer
- }
- reset_trigger_file() {
- # remove action triggers first
- grep -H ':on[^:]*(' $@ |
- while read line; do
- cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
- file=`echo $line | cut -f1 -d:`
- echo "!$cmd" >> $file
- done
- grep -Hv ^# $@ |
- while read line; do
- cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
- file=`echo $line | cut -f1 -d:`
- echo "!$cmd" > $file
- done
- }
- reset_trigger() { # reset all current setting triggers
- if [ -d events/synthetic ]; then
- reset_trigger_file events/synthetic/*/trigger
- fi
- reset_trigger_file events/*/*/trigger
- }
- reset_events_filter() { # reset all current setting filters
- grep -v ^none events/*/*/filter |
- while read line; do
- echo 0 > `echo $line | cut -f1 -d:`
- done
- }
- reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
- if [ ! -f set_ftrace_filter ]; then
- return 0
- fi
- echo > set_ftrace_filter
- grep -v '^#' set_ftrace_filter | while read t; do
- tr=`echo $t | cut -d: -f2`
- if [ "$tr" = "" ]; then
- continue
- fi
- if ! grep -q "$t" set_ftrace_filter; then
- continue;
- fi
- name=`echo $t | cut -d: -f1 | cut -d' ' -f1`
- if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
- tr=`echo $t | cut -d: -f2-4`
- limit=`echo $t | cut -d: -f5`
- else
- tr=`echo $t | cut -d: -f2`
- limit=`echo $t | cut -d: -f3`
- fi
- if [ "$limit" != "unlimited" ]; then
- tr="$tr:$limit"
- fi
- echo "!$name:$tr" > set_ftrace_filter
- done
- }
- disable_events() {
- echo 0 > events/enable
- }
- clear_synthetic_events() { # reset all current synthetic events
- grep -v ^# synthetic_events |
- while read line; do
- echo "!$line" >> synthetic_events
- done
- }
- initialize_ftrace() { # Reset ftrace to initial-state
- # As the initial state, ftrace will be set to nop tracer,
- # no events, no triggers, no filters, no function filters,
- # no probes, and tracing on.
- disable_tracing
- reset_tracer
- reset_trigger
- reset_events_filter
- reset_ftrace_filter
- disable_events
- [ -f set_event_pid ] && echo > set_event_pid
- [ -f set_ftrace_pid ] && echo > set_ftrace_pid
- [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
- [ -f set_graph_function ] && echo | tee set_graph_*
- [ -f stack_trace_filter ] && echo > stack_trace_filter
- [ -f kprobe_events ] && echo > kprobe_events
- [ -f uprobe_events ] && echo > uprobe_events
- [ -f synthetic_events ] && echo > synthetic_events
- [ -f snapshot ] && echo 0 > snapshot
- clear_trace
- enable_tracing
- }
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