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108 lines
4.3 KiB
Java
108 lines
4.3 KiB
Java
/*
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* Copyright (c) 2026, 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 gc.g1;
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/*
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* @test TestCodeCacheUnloadDuringConcurrentMark
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* @summary Tests that G1 concurrent marking unloads a freshly not-entrant nmethod.
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* @requires vm.gc.G1
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* @requires vm.flagless
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* @requires vm.compiler1.enabled
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* @requires vm.opt.ClassUnloading != false
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* @requires vm.opt.ClassUnloadingWithConcurrentMark != false
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* @requires vm.opt.MethodFlushing != false
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build jdk.test.whitebox.WhiteBox
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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
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* -XX:+WhiteBoxAPI -Xbatch -XX:-BackgroundCompilation
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* -XX:+UseG1GC
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* -XX:+ClassUnloadingWithConcurrentMark
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* gc.g1.TestCodeCacheUnloadDuringConcurrentMark
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*/
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import java.lang.reflect.Method;
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import gc.testlibrary.CodeCacheUtils;
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import jdk.test.whitebox.WhiteBox;
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import jdk.test.whitebox.code.NMethod;
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public class TestCodeCacheUnloadDuringConcurrentMark {
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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static class Target {
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public static int test(int value) {
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return value + 1;
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}
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}
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private static int compileAndMakeNotEntrant(Method method) throws Exception {
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Target.test(1);
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if (!WB.enqueueMethodForCompilation(method, 1 /* compLevel */)) {
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throw new AssertionError("Failed to enqueue target for compilation");
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}
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while (WB.isMethodQueuedForCompilation(method)) {
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Thread.sleep(50);
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}
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NMethod nmethod = NMethod.get(method, false);
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if (nmethod == null || nmethod.comp_level != 1) {
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throw new AssertionError("Target is not compiled at level 1");
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}
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int deoptimized = WB.deoptimizeMethod(method);
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if (deoptimized == 0) {
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throw new AssertionError("No target nmethod was made not-entrant");
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}
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return nmethod.compile_id;
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}
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public static void main(String[] args) throws Exception {
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// Keep an automatic cycle from reclaiming the target before the
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// test-owned concurrent mark reaches it.
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WB.concurrentGCAcquireControl();
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try {
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Method method = Target.class.getDeclaredMethod("test", int.class);
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int compileId = compileAndMakeNotEntrant(method);
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if (!CodeCacheUtils.codelistContains(compileId, method, 1, 1 /* not_entrant */)) {
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throw new AssertionError("Expected a not-entrant target nmethod before concurrent mark");
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}
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int completedCycles = WB.g1CompletedConcurrentMarkCycles();
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WB.concurrentGCRunTo(WB.AFTER_MARKING_STARTED);
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WB.concurrentGCRunToIdle();
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if (completedCycles >= WB.g1CompletedConcurrentMarkCycles()) {
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throw new AssertionError("Concurrent GC aborted");
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}
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if (CodeCacheUtils.codelistContains(compileId, method, 1, 1 /* not_entrant */)) {
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throw new AssertionError("Expected concurrent mark to unload the not-entrant target nmethod");
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}
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} finally {
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WB.concurrentGCReleaseControl();
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}
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}
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}
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