tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests: kprobe: Choose an always-defined function to probe
do_fork() is no longer defined on x86, so probe _do_fork() instead.
Fixes: 3033f14ab78c ("clone: support passing tls argument via C ...")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
authored by
Ben Hutchings
and committed by
Shuah Khan
c28628b8
55f4d731
+11
-11
+1
-1
tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc
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-1
tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc
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-1
tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc
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-1
tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc
+1
-1
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc
+1
-1
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc
···
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echo 0 > events/enable
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echo > kprobe_events
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-
echo 'p:testprobe do_fork $stack $stack0 +0($stack)' > kprobe_events
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echo 'p:testprobe _do_fork $stack $stack0 +0($stack)' > kprobe_events
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grep testprobe kprobe_events
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test -d events/kprobes/testprobe
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echo 1 > events/kprobes/testprobe/enable
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-7
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc
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tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc
···
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# prepare
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echo nop > current_tracer
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echo do_fork > set_ftrace_filter
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echo _do_fork > set_ftrace_filter
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echo 0 > events/enable
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echo > kprobe_events
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echo 'p:testprobe do_fork' > kprobe_events
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echo 'p:testprobe _do_fork' > kprobe_events
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# kprobe on / ftrace off
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echo 1 > events/kprobes/testprobe/enable
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echo > trace
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( echo "forked")
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grep testprobe trace
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! grep 'do_fork <-' trace
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! grep '_do_fork <-' trace
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# kprobe on / ftrace on
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echo function > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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grep 'do_fork <-' trace
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grep '_do_fork <-' trace
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# kprobe off / ftrace on
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echo 0 > events/kprobes/testprobe/enable
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echo > trace
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( echo "forked")
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! grep testprobe trace
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grep 'do_fork <-' trace
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grep '_do_fork <-' trace
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# kprobe on / ftrace on
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echo 1 > events/kprobes/testprobe/enable
···
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echo > trace
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( echo "forked")
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grep testprobe trace
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grep 'do_fork <-' trace
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grep '_do_fork <-' trace
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# kprobe on / ftrace off
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echo nop > current_tracer
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echo > trace
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( echo "forked")
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grep testprobe trace
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! grep 'do_fork <-' trace
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! grep '_do_fork <-' trace
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# cleanup
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echo nop > current_tracer
+1
-1
tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc
+1
-1
tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc