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a1ca238936
Commit 2867495dea ("tracing: tprobe-events: Register tracepoint when
enable tprobe event") caused regression bug and tprobe did not work.
To prevent similar problems, add a testcase which enables/disables a
tprobe and check the results.
Link: https://lore.kernel.org/r/176252610176.214996.3978515319000806265.stgit@devnote2
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
41 lines
754 B
Bash
41 lines
754 B
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Generic dynamic event - enable/disable tracepoint probe events
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# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README
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echo 0 > events/enable
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echo > dynamic_events
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TRACEPOINT=sched_switch
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ENABLEFILE=events/tracepoints/myprobe/enable
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:;: "Add tracepoint event on $TRACEPOINT" ;:
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echo "t:myprobe ${TRACEPOINT}" >> dynamic_events
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:;: "Check enable/disable to ensure it works" ;:
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echo 1 > $ENABLEFILE
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grep -q $TRACEPOINT trace
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echo 0 > $ENABLEFILE
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echo > trace
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! grep -q $TRACEPOINT trace
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:;: "Repeat enable/disable to ensure it works" ;:
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echo 1 > $ENABLEFILE
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grep -q $TRACEPOINT trace
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echo 0 > $ENABLEFILE
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echo > trace
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! grep -q $TRACEPOINT trace
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exit 0
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