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-rw-r--r--tools/testing/selftests/ftrace/test.d/00basic/trace_marker.tc82
1 files changed, 82 insertions, 0 deletions
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 100644
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