Add a testcase for array type with kprobe event. This tests good/bad syntax combinations and also the traced data is correct in several way. If the kernel doesn't support array type, it skips the test as UNSUPPORTED.
Signed-off-by: Masami Hiramatsu mhiramat@kernel.org --- Changes in v4: - Add format field tests. --- .../ftrace/test.d/kprobe/kprobe_args_array.tc | 92 ++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_array.tc
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_array.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_array.tc new file mode 100644 index 000000000000..0d0450b858fc --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_array.tc @@ -0,0 +1,92 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Kprobe event array argument + +[ -f kprobe_events ] || exit_unsupported # this is configurable + +grep -q "<type>[<array-size>]" README || exit_unsupported # version issue + +GOODSYM="_sdata" +if ! grep -qw ${GOODSYM} /proc/kallsyms ; then + GOODSYM="create_trace_kprobe" +fi +case `uname -m` in +x86_64) + ARG2=%si + OFFS=8 + BITS=64 +;; +i[3456]86) + ARG2=%cx + OFFS=4 + BITS=32 +;; +aarch64) + ARG2=%x1 + OFFS=8 + BITS=64 +;; +arm*) + ARG2=%r1 + OFFS=4 + BITS=32 +;; +*) + echo "Please implement other architecture here" + exit_untested +esac + +create_testprobe() { # args + echo "p:testprobe create_trace_kprobe $*" > kprobe_events +} + +check_field() { # grep-pattern + grep -e "$*" events/kprobes/testprobe/format +} + +echo 0 > events/enable +echo > kprobe_events + +: "Syntax test" +create_testprobe "+0(${ARG2}):x8[1] +0(${ARG2}):s16[1] +0(${ARG2}):u32[1]" +check_field "field:u8 arg1[1];.*size:1;" +check_field "field:s16 arg2[1];.*size:2;" +check_field "field:u32 arg3[1];.*size:4;" +create_testprobe "+0(${ARG2}):x64[1] +0(${ARG2}):symbol[1]" +check_field "field:u64 arg1[1];.*size:8;" +check_field "field:u${BITS} arg2[1];.*size:${OFFS};" +create_testprobe "+0(${ARG2}):b2@3/8[1] +0(${ARG2}):string[1]" +check_field "field:u8 arg1[1];.*size:1;" +check_field "field:__data_loc char[][1] arg2;.*size:4;" +create_testprobe "+0(${ARG2}):x8[64] @${GOODSYM}:x8[4]" +check_field "field:u8 arg1[64];.*size:64;" +check_field "field:u8 arg2[4];.*size:4;" + +! create_testprobe "${ARG2}:x8[1]" # Can not use array type on register +! create_testprobe "$comm:x8[1]" # Can not use array type on $comm +! create_testprobe "$comm:string[1]" # No, even if it is string array +! create_testprobe "+0(${ARG2}):x64[0]" # array size >= 1 +! create_testprobe "+0(${ARG2}):x64[65]" # array size <= 64 + +: "Test get argument (1)" +create_testprobe "arg1=+0(${ARG2}):string[1]" > kprobe_events +echo 1 > events/kprobes/testprobe/enable +! echo test >> kprobe_events +tail -n 1 trace | grep -qe "testprobe.* arg1={"test"}" +echo 0 > events/kprobes/testprobe/enable + +: "Test get argument (2)" +create_testprobe "arg1=+0(${ARG2}):string[3]" > kprobe_events +echo 1 > events/kprobes/testprobe/enable +! echo foo bar buzz >> kprobe_events +tail -n 1 trace | grep -qe "testprobe.* arg1={"foo","bar","buzz"}" +echo 0 > events/kprobes/testprobe/enable + +: "Test get argument (3)" +create_testprobe "arg1=+0(+0(${ARG2})):u8[4]" > kprobe_events +echo 1 > events/kprobes/testprobe/enable +! echo 1234 >> kprobe_events +tail -n 1 trace | grep -qe "testprobe.* arg1={49,50,51,52}" # ascii code +echo 0 > events/kprobes/testprobe/enable + +echo > kprobe_events
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