d20058f674
Add a kprobes on ftrace testcase. The testcase verifies that - enabling and disabling function tracing works on a function which already contains a dynamic kprobe - adding and removing a dynamic kprobe works on a function which is already enabled for function tracing Link: http://lkml.kernel.org/p/1413802323-5297-2-git-send-email-heiko.carstens@de.ibm.com Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
55 lines
1.2 KiB
Bash
55 lines
1.2 KiB
Bash
#!/bin/sh
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# description: Kprobe dynamic event with function tracer
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[ -f kprobe_events ] || exit_unsupported # this is configurable
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grep function available_tracers || exit_unsupported # this is configurable
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# prepare
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echo nop > current_tracer
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echo do_fork > set_ftrace_filter
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echo 0 > events/enable
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echo > kprobe_events
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echo 'p:testprobe do_fork' > kprobe_events
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# kprobe on / ftrace off
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echo 1 > events/kprobes/testprobe/enable
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echo > trace
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( echo "forked")
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grep testprobe trace
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! grep 'do_fork <-' trace
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# kprobe on / ftrace on
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echo function > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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grep 'do_fork <-' trace
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# kprobe off / ftrace on
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echo 0 > events/kprobes/testprobe/enable
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echo > trace
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( echo "forked")
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! grep testprobe trace
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grep 'do_fork <-' trace
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# kprobe on / ftrace on
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echo 1 > events/kprobes/testprobe/enable
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echo function > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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grep 'do_fork <-' trace
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# kprobe on / ftrace off
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echo nop > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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! grep 'do_fork <-' trace
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# cleanup
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echo nop > current_tracer
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echo > set_ftrace_filter
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echo 0 > events/kprobes/testprobe/enable
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echo > kprobe_events
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echo > trace
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