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