Add a testcase for symbol type with kprobe event. This tests good/bad syntax combinations and also the traced data. If the kernel doesn't support symbol type, it skips the test as UNSUPPORTED.
Signed-off-by: Masami Hiramatsu mhiramat@kernel.org --- Changes in v3: - Use IP/PC register to test the symbol type --- .../ftrace/test.d/kprobe/kprobe_args_symbol.tc | 77 ++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc new file mode 100644 index 000000000000..20a8664a838b --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_symbol.tc @@ -0,0 +1,77 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Kprobe event argument symbol type + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +grep -qe "type:.* symbol" README || exit_unsupported # version issue + +echo 0 > events/enable +echo > kprobe_events + +PROBEFUNC="vfs_read" +GOODREG= +BADREG= +REG= +GOODSYM="_sdata" +if ! grep -qw ${GOODSYM} /proc/kallsyms ; then + GOODSYM=$PROBEFUNC +fi + +case `uname -m` in +x86_64|i[3456]86) + GOODREG=%ax + BADREG=%ex + REG=%ip +;; +aarch64) + GOODREG=%x0 + BADREG=%ax + REG=%pc +;; +arm*) + GOODREG=%r0 + BADREG=%ax + REG=%pc +;; +*) + echo "Please implement other architecture here" + exit_untested +esac + +test_goodarg() # Good-args +{ + while [ "$1" ]; do + echo "p ${PROBEFUNC} $1" > kprobe_events + shift 1 + done; +} + +test_badarg() # Bad-args +{ + while [ "$1" ]; do + ! echo "p ${PROBEFUNC} $1" > kprobe_events + shift 1 + done; +} + +echo > kprobe_events + +: "Symbol type" +test_goodarg "${GOODREG}:symbol" "@${GOODSYM}:symbol" "@${GOODSYM}+10:symbol" \ + "$stack0:symbol" "+0($stack):symbol" +test_badarg "$comm:symbol" + +: "Retval with symbol type" +echo "r ${PROBEFUNC} $retval:symbol" > kprobe_events + +echo > kprobe_events + +: "Test get symbol" +echo "p:testprobe create_trace_kprobe ${REG}:symbol" > kprobe_events +echo 1 > events/kprobes/testprobe/enable +! echo test >> kprobe_events +tail -n 1 trace | grep -q "arg1=create_trace_kprobe" + +echo 0 > events/enable +echo > kprobe_events
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