# Copyright (C) 2015-2023 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/>. # Test printing of std::cerr. # libstdc++ is typically near the end of the list of shared libraries, # and thus searched last (or near last). # Plus llvm had a bug where its pubnames output that gold uses to generate # the index caused a massive perf regression (basically it emitted an entry # for every CU that used it, whereas we only want the CU with the # definition). # # Note: One difference between this test and gmonster-ptype-string.py # is that here we do not pre-expand the symtab: we don't want include # GDB's slowness in searching expanded symtabs first to color these results. from perftest import perftest from perftest import measure from perftest import utils class PrintCerr(perftest.TestCaseWithBasicMeasurements): def __init__(self, name, run_names, binfile): super(PrintCerr, self).__init__(name) self.run_names = run_names self.binfile = binfile def warm_up(self): pass def execute_test(self): for run in self.run_names: this_run_binfile = "%s-%s" % (self.binfile, utils.convert_spaces(run)) utils.select_file(this_run_binfile) utils.runto_main() iteration = 5 while iteration > 0: utils.safe_execute("mt flush symbol-cache") func = lambda: utils.safe_execute("print gm_std::cerr") self.measure.measure(func, run) iteration -= 1