64 lines
2.0 KiB
Plaintext
64 lines
2.0 KiB
Plaintext
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: event trigger - test histogram expression parsing
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# requires: set_event events/sched/sched_process_fork/trigger events/sched/sched_process_fork/hist error_log "<var1>=<field|var_ref|numeric_literal>":README
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fail() { #msg
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echo $1
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exit_fail
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}
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test_hist_expr() { # test_name expression expected_val
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trigger="events/sched/sched_process_fork/trigger"
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reset_trigger_file $trigger
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echo "Test hist trigger expressions - $1"
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echo "hist:keys=common_pid:x=$2" > $trigger
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for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
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actual=`grep -o 'x=[[:digit:]]*' $trigger | awk -F= '{ print $2 }'`
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if [ $actual != $3 ]; then
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fail "Failed hist trigger expression evaluation: Expression: $2 Expected: $3, Actual: $actual"
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fi
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reset_trigger_file $trigger
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}
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check_error() { # test_name command-with-error-pos-by-^
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trigger="events/sched/sched_process_fork/trigger"
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echo "Test hist trigger expressions - $1"
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ftrace_errlog_check 'hist:sched:sched_process_fork' "$2" $trigger
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}
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test_hist_expr "Variable assignment" "123" "123"
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test_hist_expr "Subtraction not associative" "16-8-4-2" "2"
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test_hist_expr "Division not associative" "64/8/4/2" "1"
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test_hist_expr "Same precedence operators (+,-) evaluated left to right" "16-8+4+2" "14"
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test_hist_expr "Same precedence operators (*,/) evaluated left to right" "4*3/2*2" "12"
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test_hist_expr "Multiplication evaluated before addition/subtraction" "4+3*2-2" "8"
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test_hist_expr "Division evaluated before addition/subtraction" "4+6/2-2" "5"
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# err pos for "too many subexpressions" is dependent on where
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# the last subexpression was detected. This can vary depending
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# on how the expression tree was generated.
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check_error "Too many subexpressions" 'hist:keys=common_pid:x=32+^10*3/20-4'
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check_error "Too many subexpressions" 'hist:keys=common_pid:x=^1+2+3+4+5'
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check_error "Unary minus not supported in subexpression" 'hist:keys=common_pid:x=-(^1)+2'
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check_error "Division by zero" 'hist:keys=common_pid:x=3/^0'
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exit 0
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