trigger-hist-expressions.tc (2089B)
1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: event trigger - test histogram expression parsing 4# requires: set_event events/sched/sched_process_fork/trigger events/sched/sched_process_fork/hist error_log "<var1>=<field|var_ref|numeric_literal>":README 5 6 7fail() { #msg 8 echo $1 9 exit_fail 10} 11 12test_hist_expr() { # test_name expression expected_val 13 trigger="events/sched/sched_process_fork/trigger" 14 15 reset_trigger_file $trigger 16 17 echo "Test hist trigger expressions - $1" 18 19 echo "hist:keys=common_pid:x=$2" > $trigger 20 21 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done 22 23 actual=`grep -o 'x=[[:digit:]]*' $trigger | awk -F= '{ print $2 }'` 24 25 if [ $actual != $3 ]; then 26 fail "Failed hist trigger expression evaluation: Expression: $2 Expected: $3, Actual: $actual" 27 fi 28 29 reset_trigger_file $trigger 30} 31 32check_error() { # test_name command-with-error-pos-by-^ 33 trigger="events/sched/sched_process_fork/trigger" 34 35 echo "Test hist trigger expressions - $1" 36 ftrace_errlog_check 'hist:sched:sched_process_fork' "$2" $trigger 37} 38 39test_hist_expr "Variable assignment" "123" "123" 40 41test_hist_expr "Subtraction not associative" "16-8-4-2" "2" 42 43test_hist_expr "Division not associative" "64/8/4/2" "1" 44 45test_hist_expr "Same precedence operators (+,-) evaluated left to right" "16-8+4+2" "14" 46 47test_hist_expr "Same precedence operators (*,/) evaluated left to right" "4*3/2*2" "12" 48 49test_hist_expr "Multiplication evaluated before addition/subtraction" "4+3*2-2" "8" 50 51test_hist_expr "Division evaluated before addition/subtraction" "4+6/2-2" "5" 52 53# err pos for "too many subexpressions" is dependent on where 54# the last subexpression was detected. This can vary depending 55# on how the expression tree was generated. 56check_error "Too many subexpressions" 'hist:keys=common_pid:x=32+^10*3/20-4' 57check_error "Too many subexpressions" 'hist:keys=common_pid:x=^1+2+3+4+5' 58 59check_error "Unary minus not supported in subexpression" 'hist:keys=common_pid:x=-(^1)+2' 60 61check_error "Division by zero" 'hist:keys=common_pid:x=3/^0' 62 63exit 0