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# Copyright (C) 2016-2024 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
require allow_perf_tests
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] {
return -1
}
gdb_test_no_output "set variable flag = 1"
for { set i 0 } { $i < 5 } { incr i } {
with_test_prefix "iter $i" {
set nr_skips [expr $i * $SKIP_DIRECTIVE_COUNT]
install_skips $kind $text $nr_skips
gdb_test_python_run \
"SkipCommand\(\"skip-$kind-$nr_skips\", ${SKIP_STEP_COUNT}\)"
}
}
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
}
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