1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3# Copyright (c) 2013 The Chromium OS Authors.
4#
5
6# Simple test script for tracing with sandbox
7
8TRACE_OPT="FTRACE=1"
9
10BASE="$(dirname $0)/.."
11. $BASE/common.sh
12
13run_trace() {
14	echo "Run trace"
15	./${OUTPUT_DIR}/u-boot <<END
16trace stats
17hash sha256 0 10000
18trace pause
19trace stats
20hash sha256 0 10000
21trace stats
22trace resume
23hash sha256 0 10000
24trace pause
25trace stats
26reset
27END
28}
29
30check_results() {
31	echo "Check results"
32
33	# Expect sha256 to run 3 times, so we see the string 6 times
34	if [ $(grep -c sha256 ${tmp}) -ne 6 ]; then
35		fail "sha256 error"
36	fi
37
38	# 4 sets of results (output of 'trace stats')
39	if [ $(grep -c "traced function calls" ${tmp}) -ne 4 ]; then
40		fail "trace output error"
41	fi
42
43	# Check trace counts. We expect to see an increase in the number of
44	# traced function calls between each 'trace stats' command, except
45	# between calls 2 and 3, where tracing is paused.
46	# This code gets the sign of the difference between each number and
47	# its predecessor.
48	counts="$(tr -d ',\r' <${tmp} | awk \
49		'/traced function calls/ { diff = $1 - upto; upto = $1; \
50		printf "%d ", diff < 0 ? -1 : (diff > 0 ? 1 : 0)}')"
51
52	if [ "${counts}" != "1 1 0 1 " ]; then
53		fail "trace collection error: ${counts}"
54	fi
55}
56
57echo "Simple trace test / sanity check using sandbox"
58echo
59tmp="$(tempfile)"
60build_uboot "${TRACE_OPT}"
61run_trace >${tmp}
62check_results ${tmp}
63rm ${tmp}
64echo "Test passed"
65