1# Copyright (C) 2015-2023 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# Test printing of std::cerr. 17# libstdc++ is typically near the end of the list of shared libraries, 18# and thus searched last (or near last). 19# Plus llvm had a bug where its pubnames output that gold uses to generate 20# the index caused a massive perf regression (basically it emitted an entry 21# for every CU that used it, whereas we only want the CU with the 22# definition). 23# 24# Note: One difference between this test and gmonster-ptype-string.py 25# is that here we do not pre-expand the symtab: we don't want include 26# GDB's slowness in searching expanded symtabs first to color these results. 27 28from perftest import perftest 29from perftest import measure 30from perftest import utils 31 32 33class PrintCerr(perftest.TestCaseWithBasicMeasurements): 34 def __init__(self, name, run_names, binfile): 35 super(PrintCerr, self).__init__(name) 36 self.run_names = run_names 37 self.binfile = binfile 38 39 def warm_up(self): 40 pass 41 42 def execute_test(self): 43 for run in self.run_names: 44 this_run_binfile = "%s-%s" % (self.binfile, utils.convert_spaces(run)) 45 utils.select_file(this_run_binfile) 46 utils.runto_main() 47 iteration = 5 48 while iteration > 0: 49 utils.safe_execute("mt flush symbol-cache") 50 func = lambda: utils.safe_execute("print gm_std::cerr") 51 self.measure.measure(func, run) 52 iteration -= 1 53