On Wed, 17 May 2023 20:00:10 +0900
"Masami Hiramatsu (Google)" <mhiramat@xxxxxxxxxx> wrote:
> From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
>
> Add test cases for tracepoint probe events.
>
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
> ---
> .../ftrace/test.d/dynevent/add_remove_tprobe.tc | 27 +++++++
> .../ftrace/test.d/dynevent/tprobe_syntax_errors.tc | 82 ++++++++++++++++++++
> 2 files changed, 109 insertions(+)
> create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
> create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
>
> diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
> new file mode 100644
> index 000000000000..afc8412fde6b
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
> @@ -0,0 +1,27 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: Generic dynamic event - add/remove tracepoint probe events
> +# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]": README
Hmm, there is a space between keyword and README, which allows selftests runs this
without fprobe. This needs to be fixed.
Thank you,
> +
> +echo 0 > events/enable
> +echo > dynamic_events
> +
> +TRACEPOINT1=kmem_cache_alloc
> +TRACEPOINT2=kmem_cache_free
> +
> +echo "t:myevent1 $TRACEPOINT1" >> dynamic_events
> +echo "t:myevent2 $TRACEPOINT2" >> dynamic_events
> +
> +grep -q myevent1 dynamic_events
> +grep -q myevent2 dynamic_events
> +test -d events/tracepoints/myevent1
> +test -d events/tracepoints/myevent2
> +
> +echo "-:myevent2" >> dynamic_events
> +
> +grep -q myevent1 dynamic_events
> +! grep -q myevent2 dynamic_events
> +
> +echo > dynamic_events
> +
> +clear_trace
> diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
> new file mode 100644
> index 000000000000..c8dac5c1cfa8
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
> @@ -0,0 +1,82 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: Tracepoint probe event parser error log check
> +# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]": README
> +
> +check_error() { # command-with-error-pos-by-^
> + ftrace_errlog_check 'trace_fprobe' "$1" 'dynamic_events'
> +}
> +
> +check_error 't^100 kfree' # BAD_MAXACT_TYPE
> +
> +check_error 't ^non_exist_tracepoint' # NO_TRACEPOINT
> +check_error 't:^/bar kfree' # NO_GROUP_NAME
> +check_error 't:^12345678901234567890123456789012345678901234567890123456789012345/bar kfree' # GROUP_TOO_LONG
> +
> +check_error 't:^foo.1/bar kfree' # BAD_GROUP_NAME
> +check_error 't:^ kfree' # NO_EVENT_NAME
> +check_error 't:foo/^12345678901234567890123456789012345678901234567890123456789012345 kfree' # EVENT_TOO_LONG
> +check_error 't:foo/^bar.1 kfree' # BAD_EVENT_NAME
> +
> +check_error 't kfree ^$retval' # RETVAL_ON_PROBE
> +check_error 't kfree ^$stack10000' # BAD_STACK_NUM
> +
> +check_error 't kfree ^$arg10000' # BAD_ARG_NUM
> +
> +check_error 't kfree ^$none_var' # BAD_VAR
> +check_error 't kfree ^%rax' # BAD_VAR
> +
> +check_error 't kfree ^@12345678abcde' # BAD_MEM_ADDR
> +check_error 't kfree ^@+10' # FILE_ON_KPROBE
> +
> +grep -q "imm-value" README && \
> +check_error 't kfree arg1=\^x' # BAD_IMM
> +grep -q "imm-string" README && \
> +check_error 't kfree arg1=\"abcd^' # IMMSTR_NO_CLOSE
> +
> +check_error 't kfree ^+0@0)' # DEREF_NEED_BRACE
> +check_error 't kfree ^+0ab1(@0)' # BAD_DEREF_OFFS
> +check_error 't kfree +0(+0(@0^)' # DEREF_OPEN_BRACE
> +
> +if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
> +check_error 't kfree +0(^$comm)' # COMM_CANT_DEREF
> +fi
> +
> +check_error 't kfree ^&1' # BAD_FETCH_ARG
> +
> +
> +# We've introduced this limitation with array support
> +if grep -q ' <type>\\\[<array-size>\\\]' README; then
> +check_error 't kfree +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))' # TOO_MANY_OPS?
> +check_error 't kfree +0(@11):u8[10^' # ARRAY_NO_CLOSE
> +check_error 't kfree +0(@11):u8[10]^a' # BAD_ARRAY_SUFFIX
> +check_error 't kfree +0(@11):u8[^10a]' # BAD_ARRAY_NUM
> +check_error 't kfree +0(@11):u8[^256]' # ARRAY_TOO_BIG
> +fi
> +
> +check_error 't kfree @11:^unknown_type' # BAD_TYPE
> +check_error 't kfree $stack0:^string' # BAD_STRING
> +check_error 't kfree @11:^b10@a/16' # BAD_BITFIELD
> +
> +check_error 't kfree ^arg123456789012345678901234567890=@11' # ARG_NAME_TOO_LOG
> +check_error 't kfree ^=@11' # NO_ARG_NAME
> +check_error 't kfree ^var.1=@11' # BAD_ARG_NAME
> +check_error 't kfree var1=@11 ^var1=@12' # USED_ARG_NAME
> +check_error 't kfree ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))' # ARG_TOO_LONG
> +check_error 't kfree arg1=^' # NO_ARG_BODY
> +
> +
> +# multiprobe errors
> +if grep -q "Create/append/" README && grep -q "imm-value" README; then
> +echo "t:tracepoint/testevent kfree" > dynamic_events
> +check_error '^f:tracepoint/testevent kfree' # DIFF_PROBE_TYPE
> +
> +# Explicitly use printf "%s" to not interpret \1
> +printf "%s" "t:tracepoints/testevent kfree abcd=\\1" > dynamic_events
> +check_error "t:tracepoints/testevent kfree ^bcd=\\1" # DIFF_ARG_TYPE
> +check_error "t:tracepoints/testevent kfree ^abcd=\\1:u8" # DIFF_ARG_TYPE
> +check_error "t:tracepoints/testevent kfree ^abcd=\\\"foo\"" # DIFF_ARG_TYPE
> +check_error "^t:tracepoints/testevent kfree abcd=\\1" # SAME_PROBE
> +fi
> +
> +exit 0
>
--
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
