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1#!/bin/sh2# SPDX-License-Identifier: GPL-2.03# description: event trigger - test histogram expression parsing4# requires: set_event events/sched/sched_process_fork/trigger events/sched/sched_process_fork/hist error_log "<var1>=<field|var_ref|numeric_literal>":README5 6 7fail() { #msg8 echo $19 exit_fail10}11 12test_hist_expr() { # test_name expression expected_val13 trigger="events/sched/sched_process_fork/trigger"14 15 reset_trigger_file $trigger16 17 echo "Test hist trigger expressions - $1"18 19 echo "hist:keys=common_pid:x=$2" > $trigger20 21 for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done22 23 actual=`grep -o 'x=[[:digit:]]*' $trigger | awk -F= '{ print $2 }'`24 25 if [ $actual != $3 ]; then26 fail "Failed hist trigger expression evaluation: Expression: $2 Expected: $3, Actual: $actual"27 fi28 29 reset_trigger_file $trigger30}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" $trigger37}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 where54# the last subexpression was detected. This can vary depending55# 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 064