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| author |   Tiezhu Yang <yangtiezhu@loongson.cn> | 2022-05-06 19:02:02 +0800 |
|---|---|---|
| committer |   Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2022-05-12 18:00:33 +0200 |
| commit | eab691b1a6841813e84abfc8cef392b67efdaede (patch) | |
| tree | bb10fa4c3a283c5090a921de23e5bf901a7b9eda /tools/testing/selftests/ftrace | |
| parent | MIPS: tools: no need to initialise statics to 0 (diff) | |
| download | linux-dev-eab691b1a6841813e84abfc8cef392b67efdaede.tar.xz linux-dev-eab691b1a6841813e84abfc8cef392b67efdaede.zip | |
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>
Diffstat (limited to 'tools/testing/selftests/ftrace')
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc index 312d23780096..be754f5bcf79 100644 --- a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc +++ b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc @@ -25,6 +25,8 @@ if [ $L -ne 256 ]; then exit_fail fi +cat kprobe_events >> $testlog + echo 1 > events/kprobes/enable echo 0 > events/kprobes/enable echo > kprobe_events |