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selftests/ftrace: Save kprobe_events to test log
It may lead to kernel panic when execute the following testcase on mips: # cd tools/testing/selftests/ftrace # ./ftracetest test.d/kprobe/multiple_kprobes.tc A preliminary analysis shows that the issue is related with echo 1 > events/kprobes/enable after add the 256 probe points. In order to find the root cause, I want to verify which probe point has problem, so it is necessary to save kprobe_events to test log. With this patch, we can get the 256 probe points in the test log through the following command: # ./ftracetest test.d/kprobe/multiple_kprobes.tc -vvv -k Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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@ -25,6 +25,8 @@ if [ $L -ne 256 ]; then
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exit_fail
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fi
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cat kprobe_events >> $testlog
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echo 1 > events/kprobes/enable
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echo 0 > events/kprobes/enable
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echo > kprobe_events
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