139 lines
5.1 KiB
Java
139 lines
5.1 KiB
Java
/*
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* Copyright Amazon.com Inc. 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.c2.irTests.gc;
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import jdk.test.lib.Asserts;
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import compiler.lib.ir_framework.*;
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import jdk.test.whitebox.gc.GC;
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import java.lang.ref.*;
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import java.util.*;
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/*
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* @test
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* @bug 8329597
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* @summary Test that Reference.clear intrinsics are properly handled
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* @library /test/lib /
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* @build jdk.test.whitebox.WhiteBox
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* @requires vm.compiler2.enabled
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI compiler.c2.irTests.gc.ReferenceClearTests
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*/
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public class ReferenceClearTests {
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private static String[] args(String... add) {
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List<String> args = new ArrayList<>();
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// Use PerMethodTrapLimit=0 to compile all branches in the intrinsics.
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args.add("-XX:PerMethodTrapLimit=0");
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// Forcefully inline all methods to reach the intrinsic code.
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args.add("-XX:CompileCommand=inline,compiler.c2.irTests.gc.ReferenceClearTests::*");
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args.add("-XX:CompileCommand=inline,java.lang.ref.Reference::*");
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args.add("-XX:CompileCommand=inline,java.lang.ref.PhantomReference::*");
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// Mix in test config code.
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args.addAll(Arrays.asList(add));
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return args.toArray(new String[0]);
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}
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public static void main(String[] args) {
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TestFramework framework = new TestFramework();
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int idx = 0;
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if (GC.isSelectedErgonomically() && GC.Serial.isSupported()) {
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// Serial does not have SATB/keep-alive barriers at all.
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// There are inter-generational barriers on stores, but they are
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// folded away for null stores like clear().
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framework.addScenarios(new Scenario(idx++, args(
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"-XX:+UseSerialGC"
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)));
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}
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if (GC.isSelectedErgonomically() && GC.Parallel.isSupported()) {
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// Parallel does not have SATB/keep-alive barriers at all.
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// There are inter-generational barriers on stores, but they
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// should be folded away for null stores like clear().
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framework.addScenarios(new Scenario(idx++, args(
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"-XX:+UseParallelGC"
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)));
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}
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if (GC.isSelectedErgonomically() && GC.G1.isSupported()) {
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// G1 does not have barriers in C2 IR.
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framework.addScenarios(new Scenario(idx++, args(
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"-XX:+UseG1GC"
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)));
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}
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if (GC.isSelectedErgonomically() && GC.Shenandoah.isSupported()) {
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// Shenandoah has SATB/keep-alive barriers, but they should not be
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// present clear()-s. There are load-reference barriers, which would
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// confuse the tests, so we enable only SATB barriers.
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framework.addScenarios(new Scenario(idx++, args(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:ShenandoahGCMode=passive",
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"-XX:+ShenandoahSATBBarrier",
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"-XX:+UseShenandoahGC"
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)));
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}
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if (GC.isSelectedErgonomically() && GC.Z.isSupported()) {
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// Z does not have barriers in C2 IR.
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framework.addScenarios(new Scenario(idx++, args(
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"-XX:+UseZGC"
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)));
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}
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framework.start();
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}
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static final Object REF = new Object();
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static final SoftReference<Object> SR = new SoftReference<>(REF);
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static final WeakReference<Object> WR = new WeakReference<>(REF);
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static final PhantomReference<Object> PR = new PhantomReference<>(REF, null);
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// We assert there is only a single load and a single store of Reference.referent.
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// This serves as signal that no GC barriers are emitted in IR.
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@Test
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@IR(counts = { IRNode.STORE, "1",
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IRNode.LOAD, "1" })
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public void soft() {
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SR.clear();
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}
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@Test
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@IR(counts = { IRNode.STORE, "1",
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IRNode.LOAD, "1" })
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public void weak() {
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WR.clear();
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}
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@Test
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@IR(counts = { IRNode.STORE, "1",
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IRNode.LOAD, "1" })
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public void phantom() {
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PR.clear();
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}
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}
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