On Wed, 13 Dec 2023 11:15:27 -0500 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx> > > Add a test that writes longs strings, some over the size of the sub buffer > and make sure that the entire content is there. This looks good to me. and tested. Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> Tested-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> Thank you, > > Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> > --- > Changes since v3: https://lore.kernel.org/linux-trace-kernel/20231212192317.0fb6b101@xxxxxxxxxxxxxxxxxx > > - Removed / */ from regex, to catch more than one space added to the > beginning of the print. This would have caught the bug of using "%*s" > instead of "%.*s". Luckily, the trace_printk test caught that. > > .../ftrace/test.d/00basic/trace_marker.tc | 82 +++++++++++++++++++ > 1 file changed, 82 insertions(+) > create mode 100755 tools/testing/selftests/ftrace/test.d/00basic/trace_marker.tc > > diff --git a/tools/testing/selftests/ftrace/test.d/00basic/trace_marker.tc b/tools/testing/selftests/ftrace/test.d/00basic/trace_marker.tc > new file mode 100755 > index 000000000000..9aa0db2b84fc > --- /dev/null > +++ b/tools/testing/selftests/ftrace/test.d/00basic/trace_marker.tc > @@ -0,0 +1,82 @@ > +#!/bin/sh > +# SPDX-License-Identifier: GPL-2.0 > +# description: Basic tests on writing to trace_marker > +# requires: trace_marker > +# flags: instance > + > +get_buffer_data_size() { > + sed -ne 's/^.*data.*size:\([0-9][0-9]*\).*/\1/p' events/header_page > +} > + > +get_buffer_data_offset() { > + sed -ne 's/^.*data.*offset:\([0-9][0-9]*\).*/\1/p' events/header_page > +} > + > +get_event_header_size() { > + type_len=`sed -ne 's/^.*type_len.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event` > + time_len=`sed -ne 's/^.*time_delta.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event` > + array_len=`sed -ne 's/^.*array.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event` > + total_bits=$((type_len+time_len+array_len)) > + total_bits=$((total_bits+7)) > + echo $((total_bits/8)) > +} > + > +get_print_event_buf_offset() { > + sed -ne 's/^.*buf.*offset:\([0-9][0-9]*\).*/\1/p' events/ftrace/print/format > +} > + > +event_header_size=`get_event_header_size` > +print_header_size=`get_print_event_buf_offset` > + > +data_offset=`get_buffer_data_offset` > + > +marker_meta=$((event_header_size+print_header_size)) > + > +make_str() { > + cnt=$1 > + # subtract two for \n\0 as marker adds these > + cnt=$((cnt-2)) > + printf -- 'X%.0s' $(seq $cnt) > +} > + > +write_buffer() { > + size=$1 > + > + str=`make_str $size` > + > + # clear the buffer > + echo > trace > + > + # write the string into the marker > + echo -n $str > trace_marker > + > + echo $str > +} > + > +test_buffer() { > + > + size=`get_buffer_data_size` > + oneline_size=$((size-marker_meta)) > + echo size = $size > + echo meta size = $marker_meta > + > + # Now add a little more the meta data overhead will overflow > + > + str=`write_buffer $size` > + > + # Make sure the line was broken > + new_str=`awk ' /tracing_mark_write:/ { sub(/^.*tracing_mark_write: /,"");printf "%s", $0; exit}' trace` > + > + if [ "$new_str" = "$str" ]; then > + exit fail; > + fi > + > + # Make sure the entire line can be found > + new_str=`awk ' /tracing_mark_write:/ { sub(/^.*tracing_mark_write: /,"");printf "%s", $0; }' trace` > + > + if [ "$new_str" != "$str" ]; then > + exit fail; > + fi > +} > + > +test_buffer > -- > 2.42.0 > -- Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
