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05459df0c7
Use the compilation-local seed in 'StressLCM' and 'StressGCM' rather than the global one. As a consequence, these options use by default a fresh seed in every compilation, unless 'StressSeed=N' is specified, in which case they behave deterministically. Annotate tests that use 'StressLCM' and 'StressGCM' with the 'stress' and 'randomness' keys to reflect this change in default behavior. Reviewed-by: kvn, thartmann
77 lines
3.1 KiB
Java
77 lines
3.1 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package compiler.debug;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.Asserts;
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/*
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* @test
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* @bug 8253765
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* @requires vm.debug == true & vm.compiler2.enabled
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* @summary Tests that, when compiling with StressLCM or StressGCM, using the
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* same seed results in the same compilation, and using different seeds
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* results in different compilations (the latter does not necessarily
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* hold for all pairs of seeds). The output of PrintOptoStatistics is
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* used to compare among compilations, instead of the more intuitive
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* TraceOptoPipelining which prints non-deterministic memory addresses.
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* @library /test/lib /
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* @run driver compiler.debug.TestStressCM StressLCM
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* @run driver compiler.debug.TestStressCM StressGCM
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*/
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public class TestStressCM {
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static String optoStats(String stressOpt, int stressSeed) throws Exception {
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String className = TestStressCM.class.getName();
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String[] procArgs = {
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"-Xcomp", "-XX:-TieredCompilation",
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"-XX:CompileOnly=" + className + "::sum",
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"-XX:+PrintOptoStatistics", "-XX:+" + stressOpt,
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"-XX:StressSeed=" + stressSeed, className, "10"};
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(procArgs);
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OutputAnalyzer out = new OutputAnalyzer(pb.start());
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return out.getStdout();
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}
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static void sum(int n) {
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int acc = 0;
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for (int i = 0; i < n; i++) acc += i;
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System.out.println(acc);
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}
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public static void main(String[] args) throws Exception {
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if (args[0].startsWith("Stress")) {
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String stressOpt = args[0];
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Asserts.assertEQ(optoStats(stressOpt, 10), optoStats(stressOpt, 10),
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"got different optimization stats for the same seed");
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Asserts.assertNE(optoStats(stressOpt, 10), optoStats(stressOpt, 20),
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"got the same optimization stats for different seeds");
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} else if (args.length > 0) {
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sum(Integer.parseInt(args[0]));
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}
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}
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}
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