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https://gitee.com/bianbu-linux/linux-6.6
synced 2025-07-24 01:54:03 -04:00
0787ce3360
If a probe is attached to a static function that is in multiple files with the same name, removing it by name will remove all instances: # grep jump_label_unlock set_ftrace_filter jump_label_unlock:traceoff:unlimited jump_label_unlock:traceoff:unlimited # echo '!jump_label_unlock:traceoff' >> set_ftrace_filter # grep jump_label_unlock set_ftrace_filter # But the loop in reset_ftrace_filter will try to remove multiple instances multiple times. If this happens the second time will error and cause the test to fail. At each iteration of the loop, check to see if the probe being removed still exists. Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
78 lines
2 KiB
Text
78 lines
2 KiB
Text
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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 ! 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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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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