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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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8e5e19c1b9
Just writing into the set_ftrace_filter file does not reset triggers, even though it can reset the function list. Triggers require writing the trigger name with a "!" prepended. It's worse that it requires the number if the trigger has a count associated to it. Add a reset_ftrace_filter function to the ftrace self tests to allow for the tests to have a generic way to clear them. It also resets any functions that are listed in that file as well. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
75 lines
1.9 KiB
Plaintext
75 lines
1.9 KiB
Plaintext
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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() { # reset all current setting triggers
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grep -v ^# events/*/*/trigger |
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while read line; do
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cmd=`echo $line | cut -f2- -d: | cut -f1 -d" "`
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echo "!$cmd" > `echo $line | cut -f1 -d:`
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done
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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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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 [ $tr == "enable_event" -o $tr == "disable_event" ]; then
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tr=`echo $t | cut -d: -f1-4`
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limit=`echo $t | cut -d: -f5`
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else
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tr=`echo $t | cut -d: -f1-2`
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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 "!$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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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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disable_events
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echo > set_event_pid # event tracer is always on
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[ -f set_ftrace_filter ] && echo | tee set_ftrace_*
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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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enable_tracing
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}
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