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selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes
Add a selftest that makes sure that eprobes and kprobes can not be created with the same group and name as existing events. Link: https://lore.kernel.org/linux-kselftest/20210819152825.715290342@goodmis.org/ Link: https://lkml.kernel.org/r/20210820204742.653288346@goodmis.org Cc: "Tzvetomir Stoyanov" <tz.stoyanov@gmail.com> Cc: Tom Zanussi <zanussi@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Generic dynamic event - check if duplicate events are caught
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# requires: dynamic_events "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
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echo 0 > events/enable
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HAVE_KPROBES=0
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if [ -f kprobe_events ]; then
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HAVE_KPROBES=1
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fi
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clear_dynamic_events
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# first create dynamic events for eprobes and kprobes.
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echo 'e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
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# Test eprobe for same eprobe, existing kprobe and existing event
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! echo 'e:egroup/eevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
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! echo 'e:syscalls/sys_enter_open syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
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if [ $HAVE_KPROBES -eq 1 ]; then
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echo 'p:kgroup/kevent vfs_open file=+0($arg2)' >> dynamic_events
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! echo 'e:kgroup/kevent syscalls/sys_enter_openat file=+0($filename):ustring' >> dynamic_events
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# Test kprobe for same kprobe, existing eprobe and existing event
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! echo 'p:kgroup/kevent vfs_open file=+0($arg2)' >> dynamic_events
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! echo 'p:egroup/eevent vfs_open file=+0($arg2)' >> dynamic_events
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! echo 'p:syscalls/sys_enter_open vfs_open file=+0($arg2)' >> dynamic_events
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echo '-:kgroup/kevent' >> dynamic_events
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fi
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echo '-:egroup/eevent' >> dynamic_events
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clear_trace
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