0001 clear_trace() { # reset trace output
0002 echo > trace
0003 }
0004
0005 disable_tracing() { # stop trace recording
0006 echo 0 > tracing_on
0007 }
0008
0009 enable_tracing() { # start trace recording
0010 echo 1 > tracing_on
0011 }
0012
0013 reset_tracer() { # reset the current tracer
0014 echo nop > current_tracer
0015 }
0016
0017 reset_trigger_file() {
0018 # remove action triggers first
0019 grep -H ':on[^:]*(' $@ |
0020 while read line; do
0021 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
0022 file=`echo $line | cut -f1 -d:`
0023 echo "!$cmd" >> $file
0024 done
0025 grep -Hv ^# $@ |
0026 while read line; do
0027 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
0028 file=`echo $line | cut -f1 -d:`
0029 echo "!$cmd" > $file
0030 done
0031 }
0032
0033 reset_trigger() { # reset all current setting triggers
0034 if [ -d events/synthetic ]; then
0035 reset_trigger_file events/synthetic/*/trigger
0036 fi
0037 reset_trigger_file events/*/*/trigger
0038 }
0039
0040 reset_events_filter() { # reset all current setting filters
0041 grep -v ^none events/*/*/filter |
0042 while read line; do
0043 echo 0 > `echo $line | cut -f1 -d:`
0044 done
0045 }
0046
0047 reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
0048 if [ ! -f set_ftrace_filter ]; then
0049 return 0
0050 fi
0051 echo > set_ftrace_filter
0052 grep -v '^#' set_ftrace_filter | while read t; do
0053 tr=`echo $t | cut -d: -f2`
0054 if [ "$tr" = "" ]; then
0055 continue
0056 fi
0057 if ! grep -q "$t" set_ftrace_filter; then
0058 continue;
0059 fi
0060 name=`echo $t | cut -d: -f1 | cut -d' ' -f1`
0061 if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
0062 tr=`echo $t | cut -d: -f2-4`
0063 limit=`echo $t | cut -d: -f5`
0064 else
0065 tr=`echo $t | cut -d: -f2`
0066 limit=`echo $t | cut -d: -f3`
0067 fi
0068 if [ "$limit" != "unlimited" ]; then
0069 tr="$tr:$limit"
0070 fi
0071 echo "!$name:$tr" > set_ftrace_filter
0072 done
0073 }
0074
0075 disable_events() {
0076 echo 0 > events/enable
0077 }
0078
0079 clear_synthetic_events() { # reset all current synthetic events
0080 grep -v ^# synthetic_events |
0081 while read line; do
0082 echo "!$line" >> synthetic_events
0083 done
0084 }
0085
0086 clear_dynamic_events() { # reset all current dynamic events
0087 again=1
0088 stop=1
0089 # loop mulitple times as some events require other to be removed first
0090 while [ $again -eq 1 ]; do
0091 stop=$((stop+1))
0092 # Prevent infinite loops
0093 if [ $stop -gt 10 ]; then
0094 break;
0095 fi
0096 again=2
0097 grep -v '^#' dynamic_events|
0098 while read line; do
0099 del=`echo $line | sed -e 's/^.\([^ ]*\).*/-\1/'`
0100 if ! echo "$del" >> dynamic_events; then
0101 again=1
0102 fi
0103 done
0104 done
0105 }
0106
0107 initialize_ftrace() { # Reset ftrace to initial-state
0108 # As the initial state, ftrace will be set to nop tracer,
0109 # no events, no triggers, no filters, no function filters,
0110 # no probes, and tracing on.
0111 disable_tracing
0112 reset_tracer
0113 reset_trigger
0114 reset_events_filter
0115 reset_ftrace_filter
0116 disable_events
0117 clear_dynamic_events
0118 [ -f set_event_pid ] && echo > set_event_pid
0119 [ -f set_ftrace_pid ] && echo > set_ftrace_pid
0120 [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
0121 [ -f set_graph_function ] && echo | tee set_graph_*
0122 [ -f stack_trace_filter ] && echo > stack_trace_filter
0123 [ -f kprobe_events ] && echo > kprobe_events
0124 [ -f uprobe_events ] && echo > uprobe_events
0125 [ -f synthetic_events ] && echo > synthetic_events
0126 [ -f snapshot ] && echo 0 > snapshot
0127
0128 # Stop tracing while reading the trace file by default, to prevent
0129 # the test results while checking it and to avoid taking a long time
0130 # to check the result.
0131 [ -f options/pause-on-trace ] && echo 1 > options/pause-on-trace
0132
0133 clear_trace
0134 enable_tracing
0135 }
0136
0137 finish_ftrace() {
0138 initialize_ftrace
0139 # And recover it to default.
0140 [ -f options/pause-on-trace ] && echo 0 > options/pause-on-trace
0141 }
0142
0143 check_requires() { # Check required files and tracers
0144 for i in "$@" ; do
0145 r=${i%:README}
0146 t=${i%:tracer}
0147 if [ $t != $i ]; then
0148 if ! grep -wq $t available_tracers ; then
0149 echo "Required tracer $t is not configured."
0150 exit_unsupported
0151 fi
0152 elif [ "$r" != "$i" ]; then
0153 if ! grep -Fq "$r" README ; then
0154 echo "Required feature pattern \"$r\" is not in README."
0155 exit_unsupported
0156 fi
0157 elif [ ! -e $i ]; then
0158 echo "Required feature interface $i doesn't exist."
0159 exit_unsupported
0160 fi
0161 done
0162 }
0163
0164 LOCALHOST=127.0.0.1
0165
0166 yield() {
0167 ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1
0168 }
0169
0170 # The fork function in the kernel was renamed from "_do_fork" to
0171 # "kernel_fork". As older tests should still work with older kernels
0172 # as well as newer kernels, check which version of fork is used on this
0173 # kernel so that the tests can use the fork function for the running kernel.
0174 FUNCTION_FORK=`(if grep '\bkernel_clone\b' /proc/kallsyms > /dev/null; then
0175 echo kernel_clone; else echo '_do_fork'; fi)`
0176
0177 # Since probe event command may include backslash, explicitly use printf "%s"
0178 # to NOT interpret it.
0179 ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file
0180 pos=$(printf "%s" "${2%^*}" | wc -c) # error position
0181 command=$(printf "%s" "$2" | tr -d ^)
0182 echo "Test command: $command"
0183 echo > error_log
0184 (! printf "%s" "$command" >> "$3" ) 2> /dev/null
0185 grep "$1: error:" -A 3 error_log
0186 N=$(tail -n 1 error_log | wc -c)
0187 # " Command: " and "^\n" => 13
0188 test $(expr 13 + $pos) -eq $N
0189 }
