255 lines
7.1 KiB
Java
255 lines
7.1 KiB
Java
/*
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* Copyright (c) 2019, 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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*/
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import java.util.ArrayList;
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import jdk.internal.vm.annotation.Contended;
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public class FieldLayoutApp {
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public static void main(String args[]) {
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ArrayList<TestObject> list = new ArrayList<>();
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for (int i=0; i<400; i++) {
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list.add(new Base1());
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list.add(new Child1());
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list.add(new Base2());
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list.add(new Child2());
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}
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verifyAll(list);
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// Make sure the oopmaps are laid out correctly.
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System.gc();
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verifyAll(list);
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}
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static void verifyAll(ArrayList<TestObject> list) {
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for (TestObject obj : list) {
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obj.verify();
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}
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}
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static long lastUID = 0;
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synchronized static long makeUID() {
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return ++lastUID;
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}
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synchronized static void verifyUID(long uid) {
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if (uid <= 0 || uid > lastUID) {
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error("Unexpected UID " + uid + ", must be > 0 and <= " + lastUID);
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}
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}
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static void error(String s) {
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throw new RuntimeException(s);
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}
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static void ensure(boolean b) {
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if (!b) {
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error("Assertion failed");
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}
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}
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static String makeString(long n) {
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return Long.toString(n);
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}
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static class TestObject {
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void verify() {}
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}
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static class Base1 extends TestObject {
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byte b1, b2;
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String s1;
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byte b3, b4;
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String s2;
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long uid;
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long l1;
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int i1;
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long l2;
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int i2;
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Base1() {
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uid = makeUID();
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b1 = 1;
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b2 = 2;
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b3 = 3;
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b4 = 4;
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s1 = makeString(uid + 1);
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s2 = makeString(uid + 2);
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i1 = 101;
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i2 = 102;
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l1 = 1001;
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l2 = 1002;
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}
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void verify() {
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super.verify();
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ensure(b1 == 1);
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ensure(b2 == 2);
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ensure(b3 == 3);
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ensure(b4 == 4);
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verifyUID(uid);
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ensure(s1.equals(makeString(uid + 1)));
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ensure(s2.equals(makeString(uid + 2)));
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ensure(i1 == 101);
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ensure(i2 == 102);
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ensure(l1 == 1001);
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ensure(l2 == 1002);
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}
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}
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// Base1 is archived but Child1 is loaded dynamically at runtime. Base1 may be
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// archived with different field layout options that those used during runtime.
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static class Child1 extends Base1 {
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byte cb1, cb2;
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String cs1;
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byte cb3, cb4;
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String cs2;
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long cuid;
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long cl1;
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int ci1;
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long cl2;
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int ci2;
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Child1() {
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cuid = makeUID();
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cb1 = 1;
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cb2 = 2;
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cb3 = 3;
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cb4 = 4;
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cs1 = makeString(cuid + 1);
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cs2 = makeString(cuid + 2);
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ci1 = 101;
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ci2 = 102;
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cl1 = 1001;
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cl2 = 1002;
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}
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void verify() {
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super.verify();
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ensure(cb1 == 1);
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ensure(cb2 == 2);
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ensure(cb3 == 3);
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ensure(cb4 == 4);
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verifyUID(uid);
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ensure(cs1.equals(makeString(cuid + 1)));
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ensure(cs2.equals(makeString(cuid + 2)));
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ensure(ci1 == 101);
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ensure(ci2 == 102);
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ensure(cl1 == 1001);
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ensure(cl2 == 1002);
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// Check the fields declared by the super class:
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ensure(b1 == 1); // javac should generate a FieldRef of FieldLayoutApp$Child1.b1:B,
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// even though b1 is declared in the super class.
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ensure(b2 == 2);
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ensure(b3 == 3);
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ensure(b4 == 4);
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verifyUID(uid);
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ensure(s1.equals(makeString(uid + 1)));
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ensure(s2.equals(makeString(uid + 2)));
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ensure(i1 == 101);
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ensure(i2 == 102);
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ensure(l1 == 1001);
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ensure(l2 == 1002);
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}
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}
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// Same as Base1 - minus the i1, i2, l1, l2 fields, plus some @Contended annotations
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static class Base2 extends TestObject {
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byte b1, b2;
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String s1;
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@Contended byte b3, b4;
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@Contended String s2;
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long uid;
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Base2() {
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uid = makeUID();
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b1 = 1;
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b2 = 2;
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b3 = 3;
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b4 = 4;
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s1 = makeString(uid + 1);
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s2 = makeString(uid + 2);
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}
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void verify() {
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super.verify();
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ensure(b1 == 1);
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ensure(b2 == 2);
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ensure(b3 == 3);
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ensure(b4 == 4);
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verifyUID(uid);
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ensure(s1.equals(makeString(uid + 1)));
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ensure(s2.equals(makeString(uid + 2)));
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}
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}
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// Same as Child2 - minus the ci1, ci2, cl1, cl2 fields, plus some @Contended annotations
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//
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// Base2 is archived but Child2 is loaded dynamically at runtime. Base2 may be
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// archived with different field layout options that those used during runtime.
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static class Child2 extends Base2 {
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byte cb1, cb2;
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@Contended String cs1;
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byte cb3, cb4;
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String cs2;
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@Contended long cuid;
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Child2() {
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cuid = makeUID();
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cb1 = 1;
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cb2 = 2;
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cb3 = 3;
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cb4 = 4;
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cs1 = makeString(cuid + 1);
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cs2 = makeString(cuid + 2);
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}
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void verify() {
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super.verify();
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ensure(cb1 == 1);
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ensure(cb2 == 2);
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ensure(cb3 == 3);
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ensure(cb4 == 4);
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verifyUID(uid);
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ensure(cs1.equals(makeString(cuid + 1)));
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ensure(cs2.equals(makeString(cuid + 2)));
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// Check the fields declared by the super class:
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ensure(b1 == 1); // javac should generate a FieldRef of FieldLayoutApp$Child2.b1:B,
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// even though b1 is declared in the super class.
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ensure(b2 == 2);
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ensure(b3 == 3);
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ensure(b4 == 4);
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verifyUID(uid);
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ensure(s1.equals(makeString(uid + 1)));
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ensure(s2.equals(makeString(uid + 2)));
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}
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}
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}
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