118 lines
5.4 KiB
Java
118 lines
5.4 KiB
Java
/*
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* Copyright (c) 2015, 2022, 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.humongousObjects;
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import jdk.test.lib.Asserts;
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import jdk.test.whitebox.WhiteBox;
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import java.io.IOException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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/**
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* @test gc.g1.humongousObjects.TestHumongousNonArrayAllocation
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* @summary Checks that huge class' instances (ie with huge amount of fields) are allocated successfully
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* @requires vm.gc.G1
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* @requires vm.opt.G1HeapRegionSize == "null" | vm.opt.G1HeapRegionSize == "1M"
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* @modules 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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*
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* @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousNonArrayAllocation LARGEST_NON_HUMONGOUS
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*
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* @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousNonArrayAllocation SMALLEST_HUMONGOUS
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*
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* @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousNonArrayAllocation ONE_REGION_HUMONGOUS
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*
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* @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousNonArrayAllocation TWO_REGION_HUMONGOUS
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*
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* @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousNonArrayAllocation MORE_THAN_TWO_REGION_HUMONGOUS
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*
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*/
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/**
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* The test for objects which are instances of classes with a huge amount of fields. It's an alternative way to create
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* a humongous object rather to allocate a long array.
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* The size of a class object depends on the field declared in the class. So, the tests generates such classes to cover
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* the following cases:
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* largest non-humongous object (exactly half a region)
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* smallest humongous object (half a region + sizeof(long))
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* humongous object that takes exactly one region
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* humongous object that takes more than one region (region + sizeof(long))
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* humongous object that takes more than two regions (region * 2 + sizeof(long))
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*
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*/
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public class TestHumongousNonArrayAllocation {
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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private static final String CLASS_NAME_PREFIX = TestHumongousNonArrayAllocation.class.getSimpleName() + "_";
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public static void main(String[] args) throws Exception {
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if (args.length != 1) {
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throw new Error("Test Bug: Expected class name wasn't provided as command line argument");
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}
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G1SampleClass sampleClass = G1SampleClass.valueOf(args[0]);
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Path wrkDir = Files.createTempDirectory(Paths.get(""), CLASS_NAME_PREFIX);
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URL[] url = {wrkDir.toUri().toURL()};
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URLClassLoader urlLoader = new URLClassLoader(url);
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Object sampleObject;
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try {
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sampleObject = sampleClass.getCls(urlLoader, wrkDir, CLASS_NAME_PREFIX).newInstance();
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} catch (Throwable throwable) {
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throw new AssertionError("Test Bug: Cannot create object of provided class", throwable);
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}
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boolean isHumongous = WB.g1IsHumongous(sampleObject);
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boolean shouldBeHumongous = (sampleClass.expectedInstanceSize() > (WB.g1RegionSize() / 2));
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// Sanity check
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Asserts.assertEquals(WB.getObjectSize(sampleObject), sampleClass.expectedInstanceSize(),
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String.format("Test Bug: Object of class %s is expected to take %d bytes but it takes %d.",
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sampleClass.name(), sampleClass.expectedInstanceSize(), WB.getObjectSize(sampleObject)));
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// Test check
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Asserts.assertEquals(isHumongous, shouldBeHumongous,
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String.format("Object of class %s is expected to be %shumongous but it is not",
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sampleClass.name(), (shouldBeHumongous ? "" : "non-")));
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}
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}
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