125 lines
4.5 KiB
Java
125 lines
4.5 KiB
Java
/*
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* Copyright (c) 2013, 2023, 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
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* @bug 8027756
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* @requires vm.gc.G1
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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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* @summary Humongous objects may have references from the code cache
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* @run driver gc.g1.TestHumongousCodeCacheRoots
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*/
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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.whitebox.WhiteBox;
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import java.util.ArrayList;
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import java.util.Arrays;
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class TestHumongousCodeCacheRootsHelper {
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static final int n = 1000000;
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static final int[] AA = new int[n];
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static final int[] BB = new int[n];
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public static void main(String args[]) throws Exception {
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// do some work so that the compiler compiles this method, inlining the
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// reference to the integer array (which is a humonguous object) into
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// the code cache.
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for(int i = 0; i < n; i++) {
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AA[i] = 0;
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BB[i] = 0;
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}
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// trigger a GC that checks that the verification code allows humongous
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// objects with code cache roots; objects should be all live here.
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System.gc();
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// deoptimize everyhing: this should make all compiled code zombies.
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WhiteBox wb = WhiteBox.getWhiteBox();
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wb.deoptimizeAll();
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// trigger a GC that checks that the verification code allows humongous
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// objects with code cache roots; objects should be all live here.
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System.gc();
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// wait a little for the code cache sweeper to try to clean up zombie nmethods
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// and unregister the code roots.
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try { Thread.sleep(5000); } catch (InterruptedException ex) { }
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// do some work on the arrays to make sure that they need to be live after the GCs
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for(int i = 0; i < n; i++) {
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AA[i] = 1;
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BB[i] = 10;
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}
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System.out.println();
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}
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}
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public class TestHumongousCodeCacheRoots {
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/**
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* Executes a class in a new VM process with the given parameters.
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* @param vmargs Arguments to the VM to run
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* @param classname Name of the class to run
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* @param arguments Arguments to the class
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* @return The OutputAnalyzer with the results for the invocation.
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*/
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public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments) throws Exception {
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ArrayList<String> finalargs = new ArrayList<String>();
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String[] whiteboxOpts = new String[] {
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"-Xbootclasspath/a:.",
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"-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
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"-cp", System.getProperty("java.class.path"),
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};
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finalargs.addAll(Arrays.asList(vmargs));
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finalargs.addAll(Arrays.asList(whiteboxOpts));
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finalargs.add(classname);
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finalargs.addAll(Arrays.asList(arguments));
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OutputAnalyzer output = ProcessTools.executeLimitedTestJava(finalargs);
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output.shouldHaveExitValue(0);
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return output;
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}
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public static void main(String[] args) throws Exception {
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final String[] baseArguments = new String[] {
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"-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking
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"-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run
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};
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runWhiteBoxTest(baseArguments, TestHumongousCodeCacheRootsHelper.class.getName(), new String[] { });
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}
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}
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