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/*
* Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
* @test TestLoopMiningArguments
* @summary Test that loop mining arguments are sane
* @key gc
* @requires vm.gc.Shenandoah & !vm.graal.enabled
* @requires vm.flavor == "server"
* @library /test/lib
* @run driver TestLoopMiningArguments
*/
import java.util.*;
import jdk.test.lib.Asserts;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
public class TestLoopMiningArguments {
public static void testWith(String msg, boolean cls, int iters, String... args) throws Exception {
String[] cmds = Arrays.copyOf(args, args.length + 3);
cmds[args.length] = "-Xmx128m";
cmds[args.length + 1] = "-XX:+PrintFlagsFinal";
cmds[args.length + 2] = "-version";
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(cmds);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(0);
output.shouldContain("UseCountedLoopSafepoints");
output.shouldContain("LoopStripMiningIter");
Asserts.assertEQ(output.firstMatch("(.+?) UseCountedLoopSafepoints.+?= (.+?) (.+?)", 2), Boolean.toString(cls), msg + ", but got wrong CLS");
Asserts.assertEQ(output.firstMatch("(.+?) LoopStripMiningIter.+?= (.+?) (.+?)", 2), String.valueOf(iters), msg + ", but got wrong LSM");
}
public static void main(String[] args) throws Exception {
testWith("Shenandoah should have CLS and LSM enabled",
true, 1000,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC"
);
testWith("Shenandoah with +CLS should set LSM = 1",
true, 1,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:+UseCountedLoopSafepoints"
);
testWith("Shenandoah GC with +CLS should not override LSM>1",
true, 10,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:LoopStripMiningIter=10",
"-XX:+UseCountedLoopSafepoints"
);
testWith("Shenandoah GC with +CLS should not override LSM=1",
true, 1,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:LoopStripMiningIter=1",
"-XX:+UseCountedLoopSafepoints"
);
testWith("Shenandoah GC with +CLS should override LSM=0 to 1",
true, 1,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:LoopStripMiningIter=0",
"-XX:+UseCountedLoopSafepoints"
);
testWith("Shenandoah GC with -CLS should set LSM = 0",
false, 0,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:-UseCountedLoopSafepoints"
);
testWith("Shenandoah GC with -CLS should override LSM to 0",
false, 0,
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:LoopStripMiningIter=10",
"-XX:-UseCountedLoopSafepoints"
);
}
}
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