1# Copyright (C) 2016-2023 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16# This test case is to test the speed of GDB when it is single-stepping 17# with skip directives active. There's no need to test skip directives that 18# match functions we're stepping through. That's not the interesting case. 19# The interesting case is where there are 100s or more classes or libraries, 20# each providing their own set of skip directives. 21# 22# Parameters: 23# SKIP_STEP_COUNT: the number of single steps GDB performs 24# SKIP_DIRECTIVE_COUNT: the number of skip directives to create 25 26load_lib perftest.exp 27 28if [skip_perf_tests] { 29 return 0 30} 31 32standard_testfile .cc skip-funcs.cc 33set executable $testfile 34set skip_func_file [standard_output_file $srcfile2] 35set expfile $testfile.exp 36 37# make check-perf RUNTESTFLAGS='skip-command.exp SKIP_STEP_COUNT=1000 ...' 38if ![info exists SKIP_STEP_COUNT] { 39 set SKIP_STEP_COUNT 1000 40} 41if ![info exists SKIP_DIRECTIVE_COUNT] { 42 set SKIP_DIRECTIVE_COUNT 1000 43} 44 45proc delete_all_skips { } { 46 # FIXME: skip currently doesn't ask for confirmation 47 # FIXME: "skip delete" with no skips -> 48 # "No skiplist entries found with number (null)." 49 gdb_test_no_output "set confirm off" 50 gdb_test "skip delete" "" 51 gdb_test_no_output "set confirm on" 52} 53 54proc install_skips { kind text nr_skips } { 55 global gdb_prompt 56 set test "install_skips" 57 delete_all_skips 58 switch $kind { 59 "function" { set skip_arg "-function" } 60 "regexp" { set skip_arg "-rfunction" } 61 default { 62 perror "bad skip kind: $kind" 63 return 64 } 65 } 66 for { set i 0 } { $i < $nr_skips } { incr i } { 67 gdb_test "skip $skip_arg [format $text $i]" "" 68 } 69 # There could be 1000's of these, which can overflow the buffer. 70 # However, it's good to have this in the log, so we go to the effort 71 # to read it all in. 72 gdb_test_multiple "info skip" $test { 73 -re "\[^\r\n\]*\r\n" { exp_continue } 74 -re "\[\r\n\]*$gdb_prompt $" { 75 pass $test 76 } 77 timeout { 78 fail "$test (timeout)" 79 } 80 } 81} 82 83proc write_skip_func_source { file_name func_name_prefix nr_funcs } { 84 set f [open $file_name "w"] 85 puts $f "// DO NOT EDIT, machine generated file. See skip-command.exp." 86 for { set i 0 } { $i < $nr_funcs } { incr i } { 87 set func_name [format "${func_name_prefix}_%02d" $i] 88 puts $f "int $func_name () { return 0; }" 89 } 90 close $f 91} 92 93proc run_skip_bench { kind text } { 94 global SKIP_STEP_COUNT SKIP_DIRECTIVE_COUNT 95 96 if ![runto_main] { 97 return -1 98 } 99 100 gdb_test_no_output "set variable flag = 1" 101 102 for { set i 0 } { $i < 5 } { incr i } { 103 with_test_prefix "iter $i" { 104 set nr_skips [expr $i * $SKIP_DIRECTIVE_COUNT] 105 install_skips $kind $text $nr_skips 106 gdb_test_python_run \ 107 "SkipCommand\(\"skip-$kind-$nr_skips\", ${SKIP_STEP_COUNT}\)" 108 } 109 } 110 111 gdb_test "set variable flag = 0" 112} 113 114PerfTest::assemble { 115 global srcdir subdir srcfile binfile skip_func_file 116 global SKIP_DIRECTIVE_COUNT 117 118 write_skip_func_source $skip_func_file "skip_func" [expr 4 * $SKIP_DIRECTIVE_COUNT] 119 if { [gdb_compile [list "$srcdir/$subdir/$srcfile" $skip_func_file] ${binfile} executable {c++ debug}] != "" } { 120 return -1 121 } 122 return 0 123} { 124 global binfile 125 clean_restart $binfile 126 return 0 127} { 128 global SKIP_STEP_COUNT SKIP_DIRECTIVE_COUNT 129 130 with_test_prefix "time_skip_func" { 131 # N.B. The function name must match the ones in skip-command.cc. 132 run_skip_bench "function" "skip_func_%02d" 133 } 134 135 with_test_prefix "time_skip_constructor" { 136 run_skip_bench "regexp" "^(skip_class_%02d)::\\1 *\\(" 137 } 138 139 return 0 140} 141