Messages in this thread Patch in this message | | | From | "Naveen N. Rao" <> | Subject | Re: [PATCH 1/2] trace/kprobes: Sanitize derived event names | Date | Fri, 23 Jun 2017 00:33:45 +0530 |
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On 2017/06/22 06:29PM, Masami Hiramatsu wrote: > On Thu, 22 Jun 2017 00:20:27 +0530 > "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com> wrote: > > > When we derive event names, convert some expected symbols (such as ':' > > used to specify module:name and '.' present in some symbols) into > > underscores so that the event name is not rejected. > > Oops, ok, this is my mistake. > > Acked-by: Masami Hiramatsu <mhiramat@kernel.org> > > This must be marked as bugfix for stable trees. > > Could you also add a testcase for this (module name) bug? > > MODNAME=`lsmod | head -n 2 | tail -n 1 | cut -f 1 -d " "` > FUNCNAME=`grep -m 1 "\\[$MODNAME\\]" /proc/kallsyms | xargs | cut -f 3 -d " "` > > May gives you a target name :)
Sure. Here is a test.
Thanks for the review, Naveen
- [PATCH] selftests/ftrace: Add a test to probe module functions
Add a kprobes test to ensure that we are able to add a probe on a module function using 'p <mod>:<func>' format, without having to specify a probe name.
Suggested-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> --- .../testing/selftests/ftrace/test.d/kprobe/probe_module.tc | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/probe_module.tc
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/probe_module.tc b/tools/testing/selftests/ftrace/test.d/kprobe/probe_module.tc new file mode 100644 index 000000000000..ea7657041ba6 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/kprobe/probe_module.tc @@ -0,0 +1,14 @@ +#!/bin/sh +# description: Kprobe dynamic event - probing module + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +echo 0 > events/enable +echo > kprobe_events +export MOD=`lsmod | head -n 2 | tail -n 1 | cut -f1 -d" "` +export FUNC=`grep -m 1 ".* t .*\\[$MOD\\]" /proc/kallsyms | xargs | cut -f3 -d" "` +[ "x" != "x$MOD" -a "y" != "y$FUNC" ] || exit_untested +echo p $MOD:$FUNC > kprobe_events +grep $MOD kprobe_events +echo > kprobe_events +clear_trace -- 2.13.1
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