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selftests/ftrace: Fix probepoint testcase to ignore __pfx_* symbols

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Fix kprobe probepoint testcase to ignore __pfx_* prefix symbols. Those are
introduced by commit b341b20d64 ("x86: Add prefix symbols for function
padding") for identifying PADDING_BYTES of NOPs. Since kprobe events can
not probe these prefix symbols, this testcase has to skip those symbols.

Link: https://lore.kernel.org/all/167309835609.640500.9664678940260305746.stgit@devnote3/

Fixes: b341b20d64 ("x86: Add prefix symbols for function padding")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Masami Hiramatsu (Google) 2023-02-21 08:49:16 +09:00
parent a457e944df
commit 96cd93af79
1 changed files with 1 additions and 1 deletions
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tools/testing/selftests/ftrace/test.d/kprobe/probepoint.tc
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@ -21,7 +21,7 @@ set_offs() { # prev target next
# We have to decode symbol addresses to get correct offsets.
# If the offset is not an instruction boundary, it cause -EILSEQ.
set_offs `grep -A1 -B1 ${TARGET_FUNC} /proc/kallsyms | cut -f 1 -d " " | xargs`
set_offs `grep -v __pfx_ /proc/kallsyms | grep -A1 -B1 ${TARGET_FUNC} | cut -f 1 -d " " | xargs`
UINT_TEST=no
# printf "%x" -1 returns (unsigned long)-1.