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linux
selftests: tracing: Enable fprobe events before checking enable_functions
Since the fprobe is not registered before enabling the fprobe events,
enable_functions is also empty before enabling it. Thus the tests
which checking enable_functions must ensure the event is enabled before
testing the enable_functions.
Link: https://lore.kernel.org/all/174343538009.843280.6583146613234713007.stgit@devnote2/
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
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tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
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tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
···
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echo "f:myevent1 $PLACE" >> dynamic_events
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# Make sure the event is attached and is the only one
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grep -q $PLACE enabled_functions
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 1)) ]; then
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exit_fail
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fi
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-
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echo "f:myevent2 $PLACE%return" >> dynamic_events
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-
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# It should till be the only attached function
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 1)) ]; then
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exit_fail
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fi
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# add another event
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echo "f:myevent3 $PLACE2" >> dynamic_events
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grep -q $PLACE2 enabled_functions
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 2)) ]; then
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exit_fail
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fi
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grep -q myevent1 dynamic_events
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grep -q myevent2 dynamic_events
···
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test -d events/fprobes/myevent1
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test -d events/fprobes/myevent2
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echo 1 > events/fprobes/myevent1/enable
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# Make sure the event is attached and is the only one
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grep -q $PLACE enabled_functions
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 1)) ]; then
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exit_fail
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fi
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echo 1 > events/fprobes/myevent2/enable
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# It should till be the only attached function
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 1)) ]; then
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exit_fail
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fi
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echo 1 > events/fprobes/myevent3/enable
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# If the function is different, the attached function should be increased
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grep -q $PLACE2 enabled_functions
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 2)) ]; then
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exit_fail
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fi
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echo 0 > events/fprobes/myevent2/enable
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echo "-:myevent2" >> dynamic_events
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grep -q myevent1 dynamic_events
···
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exit_fail
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fi
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echo 0 > events/fprobes/enable
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echo > dynamic_events
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# Should have none left
···
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echo "f:myevent4 $PLACE" >> dynamic_events
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echo 1 > events/fprobes/myevent4/enable
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# Should only have one enabled
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cnt=`cat enabled_functions | wc -l`
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if [ $cnt -ne $((ocnt + 1)) ]; then
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exit_fail
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fi
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echo 0 > events/fprobes/enable
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echo > dynamic_events
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# Should have none left