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| author |   Akanksha J N <akanksha@linux.ibm.com> | 2023-06-06 21:39:57 +0900 |
|---|---|---|
| committer |   Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-06-06 21:39:57 +0900 |
| commit | cf9071dd46e72bd51c116b84fe33bf671ab3ae65 (patch) | |
| tree | 712f908158589ece753bde1da6023e3c2bad6054 /tools/testing/selftests/ftrace | |
| parent | Documentation: tracing/probes: Add fprobe event tracing document (diff) | |
| download | wireguard-linux-cf9071dd46e72bd51c116b84fe33bf671ab3ae65.tar.xz wireguard-linux-cf9071dd46e72bd51c116b84fe33bf671ab3ae65.zip | |
selftests/ftrace: Add new test case which adds multiple consecutive probes in a function
Commit 97f88a3d723162 ("powerpc/kprobes: Fix null pointer reference in
arch_prepare_kprobe()") fixed a recent kernel oops that was caused as
ftrace-based kprobe does not generate kprobe::ainsn::insn and it gets
set to NULL.
Add new test case kprobe_insn_boundary.tc which adds a
kprobe at every byte within $FUNCTION_FORK up to an offset of 256 bytes,
to be able to test potential issues with kprobes on
successive instructions.
The '|| continue' is added with the echo statement to ignore errors that
are caused by trying to add kprobes to non probeable lines and continue
with the test.
Link: https://lore.kernel.org/linux-trace-kernel/20230428163842.95118-2-akanksha@linux.ibm.com
Signed-off-by: Akanksha J N <akanksha@linux.ibm.com>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'tools/testing/selftests/ftrace')
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/kprobe/kprobe_insn_boundary.tc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_insn_boundary.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_insn_boundary.tc new file mode 100644 index 000000000000..4f7cc318f331 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_insn_boundary.tc @@ -0,0 +1,19 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright (C) 2023 Akanksha J N, IBM corporation +# description: Register multiple kprobe events in a function +# requires: kprobe_events + +for i in `seq 0 255`; do + echo p $FUNCTION_FORK+${i} >> kprobe_events || continue +done + +cat kprobe_events >> $testlog + +echo 1 > events/kprobes/enable +( echo "forked" ) +echo 0 > events/kprobes/enable +echo > kprobe_events +echo "Waiting for unoptimizing & freeing" +sleep 5 +echo "Done" |