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Commit 97f88a3d72 ("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>
20 lines
476 B
Bash
20 lines
476 B
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 2023 Akanksha J N, IBM corporation
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# description: Register multiple kprobe events in a function
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# requires: kprobe_events
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for i in `seq 0 255`; do
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echo p $FUNCTION_FORK+${i} >> kprobe_events || continue
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done
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cat kprobe_events >> $testlog
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echo 1 > events/kprobes/enable
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( echo "forked" )
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echo 0 > events/kprobes/enable
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echo > kprobe_events
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echo "Waiting for unoptimizing & freeing"
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sleep 5
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echo "Done"
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