trace_marker_raw.tc

  1#!/bin/sh
  2# SPDX-License-Identifier: GPL-2.0
  3# description: Basic tests on writing to trace_marker_raw
  4# requires: trace_marker_raw
  5# flags: instance
  6
  7is_little_endian() {
  8	if lscpu | grep -q 'Little Endian'; then
  9		echo 1;
 10	else
 11		echo 0;
 12	fi
 13}
 14
 15little=`is_little_endian`
 16
 17make_str() {
 18	id=$1
 19	cnt=$2
 20
 21	if [ $little -eq 1 ]; then
 22		val=`printf "\\%03o\\%03o\\%03o\\%03o" \
 23			$(($id & 0xff)) \
 24			$((($id >> 8) & 0xff)) \
 25			$((($id >> 16) & 0xff)) \
 26			$((($id >> 24) & 0xff))`
 27	else
 28		val=`printf "\\%03o\\%03o\\%03o\\%03o" \
 29			$((($id >> 24) & 0xff)) \
 30			$((($id >> 16) & 0xff)) \
 31			$((($id >> 8) & 0xff)) \
 32			$(($id & 0xff))`
 33	fi
 34
 35	data=`printf -- 'X%.0s' $(seq $cnt)`
 36
 37	printf "${val}${data}"
 38}
 39
 40write_buffer() {
 41	id=$1
 42	size=$2
 43
 44	# write the string into the raw marker
 45	make_str $id $size > trace_marker_raw
 46}
 47
 48
 49test_multiple_writes() {
 50
 51	# Write a bunch of data where the id is the count of
 52	# data to write
 53	for i in `seq 1 10` `seq 101 110` `seq 1001 1010`; do
 54		write_buffer $i $i
 55	done
 56
 57	# add a little buffer
 58	echo stop > trace_marker
 59
 60	# Check to make sure the number of entries is the id (rounded up by 4)
 61	awk '/.*: # [0-9a-f]* / {
 62			print;
 63			cnt = -1;
 64			for (i = 0; i < NF; i++) {
 65				# The counter is after the "#" marker
 66				if ( $i == "#" ) {
 67					i++;
 68					cnt = strtonum("0x" $i);
 69					num = NF - (i + 1);
 70					# The number of items is always rounded up by 4
 71					cnt2 = int((cnt + 3) / 4) * 4;
 72					if (cnt2 != num) {
 73						exit 1;
 74					}
 75					break;
 76				}
 77			}
 78		}
 79	// { if (NR > 30) { exit 0; } } ' trace_pipe;
 80}
 81
 82
 83get_buffer_data_size() {
 84	sed -ne 's/^.*data.*size:\([0-9][0-9]*\).*/\1/p' events/header_page
 85}
 86
 87test_buffer() {
 88
 89	# The id must be four bytes, test that 3 bytes fails a write
 90	if echo -n abc > ./trace_marker_raw ; then
 91		echo "Too small of write expected to fail but did not"
 92		echo ${ORIG} > buffer_size_kb
 93		exit_fail
 94	fi
 95
 96	size=`get_buffer_data_size`
 97	echo size = $size
 98
 99	# Now add a little more than what it can handle
100
101	if write_buffer 0xdeadbeef $size ; then
102		echo "Too big of write expected to fail but did not"
103		echo ${ORIG} > buffer_size_kb
104		exit_fail
105	fi
106}
107
108ORIG=`cat buffer_size_kb`
109
110# test_multiple_writes test needs at least 12KB buffer
111NEW_SIZE=12
112
113if [ ${ORIG} -lt ${NEW_SIZE} ]; then
114	echo ${NEW_SIZE} > buffer_size_kb
115fi
116
117test_buffer
118if ! test_multiple_writes; then
119	echo ${ORIG} > buffer_size_kb
120	exit_fail
121fi
122
123echo ${ORIG} > buffer_size_kb