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selftests/ftrace: Fix to test kprobe $comm arg only if available

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Test $comm in kprobe-event argument syntax testcase
only if it is supported on the kernel because
$comm has been introduced 4.8 kernel.
So on older stable kernel, it should be skipped.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
This commit is contained in:
Masami Hiramatsu 2018-08-30 23:16:13 +09:00 committed by Shuah Khan (Samsung OSG)
parent e527c47081
commit 2452c96e61
1 changed files with 3 additions and 0 deletions
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3
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_syntax.tc
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@ -75,8 +75,11 @@ test_badarg "\$stackp" "\$stack0+10" "\$stack1-10"
echo "r ${PROBEFUNC} \$retval" > kprobe_events
! echo "p ${PROBEFUNC} \$retval" > kprobe_events
# $comm was introduced in 4.8, older kernels reject it.
if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
: "Comm access"
test_goodarg "\$comm"
fi
: "Indirect memory access"
test_goodarg "+0(${GOODREG})" "-0(${GOODREG})" "+10(\$stack)" \