| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * 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. |
| */ |
| |
| package gc.g1.humongousObjects; |
| |
| import jdk.test.lib.Asserts; |
| import sun.hotspot.WhiteBox; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| /** |
| * @test gc.g1.humongousObjects.TestHumongousNonArrayAllocation |
| * @summary Checks that huge class' instances (ie with huge amount of fields) are allocated successfully |
| * @requires vm.gc.G1 |
| * @requires vm.opt.G1HeapRegionSize == "null" | vm.opt.G1HeapRegionSize == "1M" |
| * @library /test/lib / |
| * @modules java.base/jdk.internal.misc |
| * @modules java.management |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * |
| * @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousNonArrayAllocation LARGEST_NON_HUMONGOUS |
| * |
| * @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousNonArrayAllocation SMALLEST_HUMONGOUS |
| * |
| * @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousNonArrayAllocation ONE_REGION_HUMONGOUS |
| * |
| * @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousNonArrayAllocation TWO_REGION_HUMONGOUS |
| * |
| * @run main/othervm -Xms128M -Xmx128M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousNonArrayAllocation MORE_THAN_TWO_REGION_HUMONGOUS |
| * |
| */ |
| |
| /** |
| * The test for objects which are instances of classes with a huge amount of fields. It's an alternative way to create |
| * a humongous object rather to allocate a long array. |
| * The size of a class object depends on the field declared in the class. So, the tests generates such classes to cover |
| * the following cases: |
| * largest non-humongous object (exactly half a region) |
| * smallest humongous object (half a region + sizeof(long)) |
| * humongous object that takes exactly one region |
| * humongous object that takes more than one region (region + sizeof(long)) |
| * humongous object that takes more than two regions (region * 2 + sizeof(long)) |
| * |
| */ |
| public class TestHumongousNonArrayAllocation { |
| private static final WhiteBox WB = WhiteBox.getWhiteBox(); |
| private static final String CLASS_NAME_PREFIX = TestHumongousNonArrayAllocation.class.getSimpleName() + "_"; |
| |
| public static void main(String[] args) throws ClassNotFoundException, InstantiationException, |
| IllegalAccessException, IOException { |
| |
| if (args.length != 1) { |
| throw new Error("Test Bug: Expected class name wasn't provided as command line argument"); |
| } |
| G1SampleClass sampleClass = G1SampleClass.valueOf(args[0]); |
| |
| Path wrkDir = Files.createTempDirectory(Paths.get(""), CLASS_NAME_PREFIX); |
| URL[] url = {wrkDir.toUri().toURL()}; |
| URLClassLoader urlLoader = new URLClassLoader(url); |
| |
| Object sampleObject; |
| try { |
| sampleObject = sampleClass.getCls(urlLoader, wrkDir, CLASS_NAME_PREFIX).newInstance(); |
| } catch (Throwable throwable) { |
| throw new AssertionError("Test Bug: Cannot create object of provided class", throwable); |
| } |
| |
| boolean isHumongous = WB.g1IsHumongous(sampleObject); |
| boolean shouldBeHumongous = (sampleClass.expectedInstanceSize() > (WB.g1RegionSize() / 2)); |
| |
| // Sanity check |
| Asserts.assertEquals(WB.getObjectSize(sampleObject), sampleClass.expectedInstanceSize(), |
| String.format("Test Bug: Object of class %s is expected to take %d bytes but it takes %d.", |
| sampleClass.name(), sampleClass.expectedInstanceSize(), WB.getObjectSize(sampleObject))); |
| |
| // Test check |
| Asserts.assertEquals(isHumongous, shouldBeHumongous, |
| String.format("Object of class %s is expected to be %shumongous but it is not", |
| sampleClass.name(), (shouldBeHumongous ? "" : "non-"))); |
| } |
| |
| } |