1check_filter_file() { # check filter file introduced by dynamic ftrace 2 if [ ! -f "$1" ]; then 3 echo "$1 not found? Is dynamic ftrace not set?" 4 exit_unsupported 5 fi 6} 7 8clear_trace() { # reset trace output 9 echo > trace 10} 11 12disable_tracing() { # stop trace recording 13 echo 0 > tracing_on 14} 15 16enable_tracing() { # start trace recording 17 echo 1 > tracing_on 18} 19 20reset_tracer() { # reset the current tracer 21 echo nop > current_tracer 22} 23 24reset_trigger_file() { 25 # remove action triggers first 26 grep -H ':on[^:]*(' $@ | 27 while read line; do 28 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["` 29 file=`echo $line | cut -f1 -d:` 30 echo "!$cmd" >> $file 31 done 32 grep -Hv ^# $@ | 33 while read line; do 34 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["` 35 file=`echo $line | cut -f1 -d:` 36 echo "!$cmd" > $file 37 done 38} 39 40reset_trigger() { # reset all current setting triggers 41 if [ -d events/synthetic ]; then 42 reset_trigger_file events/synthetic/*/trigger 43 fi 44 reset_trigger_file events/*/*/trigger 45} 46 47reset_events_filter() { # reset all current setting filters 48 grep -v ^none events/*/*/filter | 49 while read line; do 50 echo 0 > `echo $line | cut -f1 -d:` 51 done 52} 53 54reset_ftrace_filter() { # reset all triggers in set_ftrace_filter 55 if [ ! -f set_ftrace_filter ]; then 56 return 0 57 fi 58 echo > set_ftrace_filter 59 grep -v '^#' set_ftrace_filter | while read t; do 60 tr=`echo $t | cut -d: -f2` 61 if [ "$tr" = "" ]; then 62 continue 63 fi 64 if ! grep -q "$t" set_ftrace_filter; then 65 continue; 66 fi 67 name=`echo $t | cut -d: -f1 | cut -d' ' -f1` 68 if [ $tr = "enable_event" -o $tr = "disable_event" ]; then 69 tr=`echo $t | cut -d: -f2-4` 70 limit=`echo $t | cut -d: -f5` 71 else 72 tr=`echo $t | cut -d: -f2` 73 limit=`echo $t | cut -d: -f3` 74 fi 75 if [ "$limit" != "unlimited" ]; then 76 tr="$tr:$limit" 77 fi 78 echo "!$name:$tr" > set_ftrace_filter 79 done 80} 81 82disable_events() { 83 echo 0 > events/enable 84} 85 86clear_synthetic_events() { # reset all current synthetic events 87 grep -v ^# synthetic_events | 88 while read line; do 89 echo "!$line" >> synthetic_events 90 done 91} 92 93initialize_ftrace() { # Reset ftrace to initial-state 94# As the initial state, ftrace will be set to nop tracer, 95# no events, no triggers, no filters, no function filters, 96# no probes, and tracing on. 97 disable_tracing 98 reset_tracer 99 reset_trigger 100 reset_events_filter 101 reset_ftrace_filter 102 disable_events 103 [ -f set_event_pid ] && echo > set_event_pid 104 [ -f set_ftrace_pid ] && echo > set_ftrace_pid 105 [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace 106 [ -f set_graph_function ] && echo | tee set_graph_* 107 [ -f stack_trace_filter ] && echo > stack_trace_filter 108 [ -f kprobe_events ] && echo > kprobe_events 109 [ -f uprobe_events ] && echo > uprobe_events 110 [ -f synthetic_events ] && echo > synthetic_events 111 [ -f snapshot ] && echo 0 > snapshot 112 clear_trace 113 enable_tracing 114} 115 116LOCALHOST=127.0.0.1 117 118yield() { 119 ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1 120} 121 122ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file 123 pos=$(echo -n "${2%^*}" | wc -c) # error position 124 command=$(echo "$2" | tr -d ^) 125 echo "Test command: $command" 126 echo > error_log 127 (! echo "$command" >> "$3" ) 2> /dev/null 128 grep "$1: error:" -A 3 error_log 129 N=$(tail -n 1 error_log | wc -c) 130 # " Command: " and "^\n" => 13 131 test $(expr 13 + $pos) -eq $N 132} 133