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1#!/bin/sh2# SPDX-License-Identifier: GPL-2.03# description: Basic tests on writing to trace_marker4# requires: trace_marker5# flags: instance6 7get_buffer_data_size() {8 sed -ne 's/^.*data.*size:\([0-9][0-9]*\).*/\1/p' events/header_page9}10 11get_buffer_data_offset() {12 sed -ne 's/^.*data.*offset:\([0-9][0-9]*\).*/\1/p' events/header_page13}14 15get_event_header_size() {16 type_len=`sed -ne 's/^.*type_len.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event`17 time_len=`sed -ne 's/^.*time_delta.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event`18 array_len=`sed -ne 's/^.*array.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event`19 total_bits=$((type_len+time_len+array_len))20 total_bits=$((total_bits+7))21 echo $((total_bits/8))22}23 24get_print_event_buf_offset() {25 sed -ne 's/^.*buf.*offset:\([0-9][0-9]*\).*/\1/p' events/ftrace/print/format26}27 28event_header_size=`get_event_header_size`29print_header_size=`get_print_event_buf_offset`30 31data_offset=`get_buffer_data_offset`32 33marker_meta=$((event_header_size+print_header_size))34 35make_str() {36 cnt=$137 # subtract two for \n\0 as marker adds these38 cnt=$((cnt-2))39 printf -- 'X%.0s' $(seq $cnt)40}41 42write_buffer() {43 size=$144 45 str=`make_str $size`46 47 # clear the buffer48 echo > trace49 50 # write the string into the marker51 echo -n $str > trace_marker52 53 echo $str54}55 56test_buffer() {57 58 size=`get_buffer_data_size`59 oneline_size=$((size-marker_meta))60 echo size = $size61 echo meta size = $marker_meta62 63 # Now add a little more the meta data overhead will overflow64 65 str=`write_buffer $size`66 67 # Make sure the line was broken68 new_str=`awk ' /tracing_mark_write:/ { sub(/^.*tracing_mark_write: /,"");printf "%s", $0; exit}' trace`69 70 if [ "$new_str" = "$str" ]; then71 exit fail;72 fi73 74 # Make sure the entire line can be found75 new_str=`awk ' /tracing_mark_write:/ { sub(/^.*tracing_mark_write: /,"");printf "%s", $0; }' trace`76 77 if [ "$new_str" != "$str" ]; then78 exit fail;79 fi80}81 82test_buffer83