diff options
Diffstat (limited to 'gdb/testsuite/gdb.perf/skip-command.exp')
| -rw-r--r-- | gdb/testsuite/gdb.perf/skip-command.exp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.perf/skip-command.exp b/gdb/testsuite/gdb.perf/skip-command.exp new file mode 100644 index 0000000..d251725 --- /dev/null +++ b/gdb/testsuite/gdb.perf/skip-command.exp @@ -0,0 +1,138 @@ +# Copyright (C) 2016 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +# This test case is to test the speed of GDB when it is single-stepping +# with skip directives active. There's no need to test skip directives that +# match functions we're stepping through. That's not the interesting case. +# The interesting case is where there are 100s or more classes or libraries, +# each providing their own set of skip directives. +# +# Parameters: +# SKIP_STEP_COUNT: the number of single steps GDB performs +# SKIP_DIRECTIVE_COUNT: the number of skip directives to create + +load_lib perftest.exp + +if [skip_perf_tests] { + return 0 +} + +standard_testfile .cc skip-funcs.cc +set executable $testfile +set skip_func_file [standard_output_file $srcfile2] +set expfile $testfile.exp + +# make check-perf RUNTESTFLAGS='skip-command.exp SKIP_STEP_COUNT=1000 ...' +if ![info exists SKIP_STEP_COUNT] { + set SKIP_STEP_COUNT 1000 +} +if ![info exists SKIP_DIRECTIVE_COUNT] { + set SKIP_DIRECTIVE_COUNT 1000 +} + +proc delete_all_skips { } { + # FIXME: skip currently doesn't ask for confirmation + # FIXME: "skip delete" with no skips -> + # "No skiplist entries found with number (null)." + gdb_test_no_output "set confirm off" + gdb_test "skip delete" "" + gdb_test_no_output "set confirm on" +} + +proc install_skips { kind text nr_skips } { + global gdb_prompt + set test "install_skips" + delete_all_skips + switch $kind { + "function" { set skip_arg "-function" } + "regexp" { set skip_arg "-rfunction" } + default { + perror "bad skip kind: $kind" + return + } + } + for { set i 0 } { $i < $nr_skips } { incr i } { + gdb_test "skip $skip_arg [format $text $i]" "" + } + # There could be 1000's of these, which can overflow the buffer. + # However, it's good to have this in the log, so we go to the effort + # to read it all in. + gdb_test_multiple "info skip" $test { + -re "\[^\r\n\]*\r\n" { exp_continue } + -re "\[\r\n\]*$gdb_prompt $" { + pass $test + } + timeout { + fail "$test (timeout)" + } + } +} + +proc write_skip_func_source { file_name func_name_prefix nr_funcs } { + set f [open $file_name "w"] + puts $f "// DO NOT EDIT, machine generated file. See skip-command.exp." + for { set i 0 } { $i < $nr_funcs } { incr i } { + set func_name [format "${func_name_prefix}_%02d" $i] + puts $f "int $func_name () { return 0; }" + } + close $f +} + +proc run_skip_bench { kind text } { + global SKIP_STEP_COUNT SKIP_DIRECTIVE_COUNT + + if ![runto_main] { + fail "Can't run to main" + return -1 + } + + gdb_test_no_output "set variable flag = 1" + + for { set i 0 } { $i < 5 } { incr i } { + set nr_skips [expr $i * $SKIP_DIRECTIVE_COUNT] + install_skips $kind $text $nr_skips + gdb_test_no_output "python SkipCommand\(\"skip-$kind-$nr_skips\", ${SKIP_STEP_COUNT}\).run()" + } + + gdb_test "set variable flag = 0" +} + +PerfTest::assemble { + global srcdir subdir srcfile binfile skip_func_file + global SKIP_DIRECTIVE_COUNT + + write_skip_func_source $skip_func_file "skip_func" [expr 4 * $SKIP_DIRECTIVE_COUNT] + if { [gdb_compile [list "$srcdir/$subdir/$srcfile" $skip_func_file] ${binfile} executable {c++ debug}] != "" } { + return -1 + } + return 0 +} { + global binfile + clean_restart $binfile + return 0 +} { + global SKIP_STEP_COUNT SKIP_DIRECTIVE_COUNT + + with_test_prefix "time_skip_func" { + # N.B. The function name must match the ones in skip-command.cc. + run_skip_bench "function" "skip_func_%02d" + } + + with_test_prefix "time_skip_constructor" { + run_skip_bench "regexp" "^(skip_class_%02d)::\\1 *\\(" + } + + return 0 +} |