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139 lines
4.1 KiB
Plaintext
139 lines
4.1 KiB
Plaintext
# Copyright (C) 2016-2023 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This test case is to test the speed of GDB when it is single-stepping
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# with skip directives active. There's no need to test skip directives that
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# match functions we're stepping through. That's not the interesting case.
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# The interesting case is where there are 100s or more classes or libraries,
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# each providing their own set of skip directives.
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#
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# Parameters:
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# SKIP_STEP_COUNT: the number of single steps GDB performs
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# SKIP_DIRECTIVE_COUNT: the number of skip directives to create
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load_lib perftest.exp
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require allow_perf_tests
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standard_testfile .cc skip-funcs.cc
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set executable $testfile
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set skip_func_file [standard_output_file $srcfile2]
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set expfile $testfile.exp
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# make check-perf RUNTESTFLAGS='skip-command.exp SKIP_STEP_COUNT=1000 ...'
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if ![info exists SKIP_STEP_COUNT] {
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set SKIP_STEP_COUNT 1000
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}
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if ![info exists SKIP_DIRECTIVE_COUNT] {
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set SKIP_DIRECTIVE_COUNT 1000
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}
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proc delete_all_skips { } {
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# FIXME: skip currently doesn't ask for confirmation
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# FIXME: "skip delete" with no skips ->
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# "No skiplist entries found with number (null)."
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gdb_test_no_output "set confirm off"
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gdb_test "skip delete" ""
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gdb_test_no_output "set confirm on"
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}
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proc install_skips { kind text nr_skips } {
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global gdb_prompt
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set test "install_skips"
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delete_all_skips
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switch $kind {
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"function" { set skip_arg "-function" }
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"regexp" { set skip_arg "-rfunction" }
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default {
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perror "bad skip kind: $kind"
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return
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}
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}
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for { set i 0 } { $i < $nr_skips } { incr i } {
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gdb_test "skip $skip_arg [format $text $i]" ""
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}
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# There could be 1000's of these, which can overflow the buffer.
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# However, it's good to have this in the log, so we go to the effort
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# to read it all in.
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gdb_test_multiple "info skip" $test {
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-re "\[^\r\n\]*\r\n" { exp_continue }
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-re "\[\r\n\]*$gdb_prompt $" {
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pass $test
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}
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timeout {
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fail "$test (timeout)"
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}
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}
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}
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proc write_skip_func_source { file_name func_name_prefix nr_funcs } {
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set f [open $file_name "w"]
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puts $f "// DO NOT EDIT, machine generated file. See skip-command.exp."
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for { set i 0 } { $i < $nr_funcs } { incr i } {
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set func_name [format "${func_name_prefix}_%02d" $i]
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puts $f "int $func_name () { return 0; }"
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}
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close $f
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}
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proc run_skip_bench { kind text } {
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global SKIP_STEP_COUNT SKIP_DIRECTIVE_COUNT
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if ![runto_main] {
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return -1
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}
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gdb_test_no_output "set variable flag = 1"
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for { set i 0 } { $i < 5 } { incr i } {
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with_test_prefix "iter $i" {
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set nr_skips [expr $i * $SKIP_DIRECTIVE_COUNT]
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install_skips $kind $text $nr_skips
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gdb_test_python_run \
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"SkipCommand\(\"skip-$kind-$nr_skips\", ${SKIP_STEP_COUNT}\)"
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}
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}
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gdb_test "set variable flag = 0"
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}
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PerfTest::assemble {
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global srcdir subdir srcfile binfile skip_func_file
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global SKIP_DIRECTIVE_COUNT
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write_skip_func_source $skip_func_file "skip_func" [expr 4 * $SKIP_DIRECTIVE_COUNT]
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if { [gdb_compile [list "$srcdir/$subdir/$srcfile" $skip_func_file] ${binfile} executable {c++ debug}] != "" } {
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return -1
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}
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return 0
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} {
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global binfile
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clean_restart $binfile
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return 0
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} {
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global SKIP_STEP_COUNT SKIP_DIRECTIVE_COUNT
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with_test_prefix "time_skip_func" {
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# N.B. The function name must match the ones in skip-command.cc.
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run_skip_bench "function" "skip_func_%02d"
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}
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with_test_prefix "time_skip_constructor" {
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run_skip_bench "regexp" "^(skip_class_%02d)::\\1 *\\("
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}
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return 0
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}
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