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selftests: ftrace: Add a testcase for string type with kprobe_event
Add a testcase for string type with kprobe event.
This tests good/bad syntax combinations and also
the traced data is correct in several way.
Link: http://lkml.kernel.org/r/152129038381.31874.9201387794548737554.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
authored by
Masami Hiramatsu
and committed by
Steven Rostedt (VMware)
5fbdbed7
871bef20
+46
+46
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_string.tc
+46
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_string.tc
···
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Kprobe event string type argument
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[ -f kprobe_events ] || exit_unsupported # this is configurable
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echo 0 > events/enable
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echo > kprobe_events
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case `uname -m` in
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x86_64)
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ARG2=%si
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OFFS=8
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;;
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i[3456]86)
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ARG2=%cx
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OFFS=4
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;;
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aarch64)
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ARG2=%x1
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OFFS=8
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;;
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arm*)
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ARG2=%r1
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OFFS=4
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;;
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*)
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echo "Please implement other architecture here"
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exit_untested
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esac
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: "Test get argument (1)"
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echo "p:testprobe create_trace_kprobe arg1=+0(+0(${ARG2})):string" > kprobe_events
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echo 1 > events/kprobes/testprobe/enable
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! echo test >> kprobe_events
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tail -n 1 trace | grep -qe "testprobe.* arg1=\"test\""
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echo 0 > events/kprobes/testprobe/enable
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: "Test get argument (2)"
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echo "p:testprobe create_trace_kprobe arg1=+0(+0(${ARG2})):string arg2=+0(+${OFFS}(${ARG2})):string" > kprobe_events
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echo 1 > events/kprobes/testprobe/enable
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! echo test1 test2 >> kprobe_events
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tail -n 1 trace | grep -qe "testprobe.* arg1=\"test1\" arg2=\"test2\""
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echo 0 > events/enable
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echo > kprobe_events