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    Subject[PATCH v5 18/19] selftests: ftrace: Add a testcase for $argN with kprobe_event
    Date
    Add a testcase for $argN with kprobe event.
    This tests whether the traced data is correct or not.
    If the kernel doesn't support $argN (depends on arch),
    it skips the test as UNSUPPORTED.

    Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
    ---
    Changes in v5:
    - Fix description.
    ---
    .../ftrace/test.d/kprobe/kprobe_args_argN.tc | 25 ++++++++++++++++++++
    1 file changed, 25 insertions(+)
    create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc

    diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc
    new file mode 100644
    index 000000000000..d5c5c8c3a51e
    --- /dev/null
    +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc
    @@ -0,0 +1,25 @@
    +#!/bin/sh
    +# SPDX-License-Identifier: GPL-2.0
    +# description: Kprobe event argN argument
    +
    +[ -f kprobe_events ] || exit_unsupported # this is configurable
    +
    +grep -q "arg<N>" README || exit_unsupported # version issue
    +
    +echo 0 > events/enable
    +echo > kprobe_events
    +
    +: "Test bad pattern : arg0 is not allowed"
    +! echo 'p:testprobe create_trace_kprobe $arg0' > kprobe_events
    +
    +: "Test get argument"
    +echo 'p:testprobe create_trace_kprobe $arg1' > kprobe_events
    +echo 1 > events/kprobes/testprobe/enable
    +! echo test >> kprobe_events
    +tail -n 1 trace | grep -qe "testprobe.* arg1=0x1"
    +
    +! echo test test test >> kprobe_events
    +tail -n 1 trace | grep -qe "testprobe.* arg1=0x3"
    +
    +echo 0 > events/enable
    +echo > kprobe_events
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