131f840d5b
Reset ftrace to initial state before running each test. This fixes some test cases to enable tracing before starting trace test. This can avoid false-positive failure when previous testcase fails while disabling tracing. Link: http://lkml.kernel.org/r/147928398192.22982.7767460638302113002.stgit@devbox Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
54 lines
1.3 KiB
Plaintext
54 lines
1.3 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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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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