83 lines
1.9 KiB
Bash
83 lines
1.9 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Basic tests on writing to trace_marker
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# requires: trace_marker
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# flags: instance
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get_buffer_data_size() {
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sed -ne 's/^.*data.*size:\([0-9][0-9]*\).*/\1/p' events/header_page
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}
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get_buffer_data_offset() {
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sed -ne 's/^.*data.*offset:\([0-9][0-9]*\).*/\1/p' events/header_page
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}
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get_event_header_size() {
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type_len=`sed -ne 's/^.*type_len.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event`
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time_len=`sed -ne 's/^.*time_delta.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event`
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array_len=`sed -ne 's/^.*array.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/header_event`
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total_bits=$((type_len+time_len+array_len))
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total_bits=$((total_bits+7))
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echo $((total_bits/8))
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}
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get_print_event_buf_offset() {
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sed -ne 's/^.*buf.*offset:\([0-9][0-9]*\).*/\1/p' events/ftrace/print/format
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}
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event_header_size=`get_event_header_size`
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print_header_size=`get_print_event_buf_offset`
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data_offset=`get_buffer_data_offset`
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marker_meta=$((event_header_size+print_header_size))
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make_str() {
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cnt=$1
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# subtract two for \n\0 as marker adds these
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cnt=$((cnt-2))
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printf -- 'X%.0s' $(seq $cnt)
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}
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write_buffer() {
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size=$1
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str=`make_str $size`
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# clear the buffer
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echo > trace
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# write the string into the marker
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echo -n $str > trace_marker
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echo $str
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}
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test_buffer() {
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size=`get_buffer_data_size`
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oneline_size=$((size-marker_meta))
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echo size = $size
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echo meta size = $marker_meta
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# Now add a little more the meta data overhead will overflow
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str=`write_buffer $size`
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# Make sure the line was broken
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new_str=`awk ' /tracing_mark_write:/ { sub(/^.*tracing_mark_write: /,"");printf "%s", $0; exit}' trace`
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if [ "$new_str" = "$str" ]; then
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exit fail;
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fi
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# Make sure the entire line can be found
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new_str=`awk ' /tracing_mark_write:/ { sub(/^.*tracing_mark_write: /,"");printf "%s", $0; }' trace`
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if [ "$new_str" != "$str" ]; then
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exit fail;
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fi
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}
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test_buffer
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