clear_trace() { # reset trace output echo > trace } disable_tracing() { # stop trace recording echo 0 > tracing_on } enable_tracing() { # start trace recording echo 1 > tracing_on } reset_tracer() { # reset the current tracer echo nop > current_tracer } reset_trigger_file() { # remove action triggers first grep -H ':on[^:]*(' $@ | while read line; do cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["` file=`echo $line | cut -f1 -d:` echo "!$cmd" >> $file done grep -Hv ^# $@ | while read line; do cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["` file=`echo $line | cut -f1 -d:` echo "!$cmd" > $file done } reset_trigger() { # reset all current setting triggers if [ -d events/synthetic ]; then reset_trigger_file events/synthetic/*/trigger fi reset_trigger_file events/*/*/trigger } reset_events_filter() { # reset all current setting filters grep -v ^none events/*/*/filter | while read line; do echo 0 > `echo $line | cut -f1 -d:` done } reset_ftrace_filter() { # reset all triggers in set_ftrace_filter if [ ! -f set_ftrace_filter ]; then return 0 fi echo > set_ftrace_filter grep -v '^#' set_ftrace_filter | while read t; do tr=`echo $t | cut -d: -f2` if [ "$tr" = "" ]; then continue fi if ! grep -q "$t" set_ftrace_filter; then continue; fi name=`echo $t | cut -d: -f1 | cut -d' ' -f1` if [ $tr = "enable_event" -o $tr = "disable_event" ]; then tr=`echo $t | cut -d: -f2-4` limit=`echo $t | cut -d: -f5` else tr=`echo $t | cut -d: -f2` limit=`echo $t | cut -d: -f3` fi if [ "$limit" != "unlimited" ]; then tr="$tr:$limit" fi echo "!$name:$tr" > set_ftrace_filter done } disable_events() { echo 0 > events/enable } clear_synthetic_events() { # reset all current synthetic events grep -v ^# synthetic_events | while read line; do echo "!$line" >> synthetic_events done } initialize_ftrace() { # Reset ftrace to initial-state # As the initial state, ftrace will be set to nop tracer, # no events, no triggers, no filters, no function filters, # no probes, and tracing on. disable_tracing reset_tracer reset_trigger reset_events_filter reset_ftrace_filter disable_events [ -f set_event_pid ] && echo > set_event_pid [ -f set_ftrace_pid ] && echo > set_ftrace_pid [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace [ -f set_graph_function ] && echo | tee set_graph_* [ -f stack_trace_filter ] && echo > stack_trace_filter [ -f kprobe_events ] && echo > kprobe_events [ -f uprobe_events ] && echo > uprobe_events [ -f synthetic_events ] && echo > synthetic_events [ -f snapshot ] && echo 0 > snapshot clear_trace enable_tracing } check_requires() { # Check required files for i in $* ; do if [ ! -e $i ]; then echo "Required feature interface $i doesn't exist." exit_unsupported fi done } LOCALHOST=127.0.0.1 yield() { ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1 } # Since probe event command may include backslash, explicitly use printf "%s" # to NOT interpret it. ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file pos=$(printf "%s" "${2%^*}" | wc -c) # error position command=$(printf "%s" "$2" | tr -d ^) echo "Test command: $command" echo > error_log (! printf "%s" "$command" >> "$3" ) 2> /dev/null grep "$1: error:" -A 3 error_log N=$(tail -n 1 error_log | wc -c) # " Command: " and "^\n" => 13 test $(expr 13 + $pos) -eq $N }