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selftests/ftrace: Add new test case which checks non unique symbol

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If name_show() is non unique, this test will try to install a kprobe on this
function which should fail returning EADDRNOTAVAIL.
On kernel where name_show() is not unique, this test is skipped.

Link: https://lore.kernel.org/all/[email protected]/

Cc: [email protected]
Signed-off-by: Francis Laniel <[email protected]>
Acked-by: Masami Hiramatsu (Google) <[email protected]>
Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
This commit is contained in:
Francis Laniel authored and Masami Hiramatsu (Google) committed 2023-10-20 22:11:49 +09:00
1 parent b022f0c7e4
commit 03b80ff802
1 file changed
+13
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tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Test failure of registering kprobe on non unique symbol
# requires: kprobe_events
SYMBOL='name_show'
# We skip this test on kernel where SYMBOL is unique or does not exist.
if [ "$(grep -c -E "[[:alnum:]]+ t ${SYMBOL}" /proc/kallsyms)" -le '1' ]; then
exit_unsupported
fi
! echo "p:test_non_unique ${SYMBOL}" > kprobe_events