141 lines
4.3 KiB
Java
141 lines
4.3 KiB
Java
/*
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* Copyright (c) 2007, 2018, 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 nsk.jvmti.unit.FollowReferences;
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import java.io.PrintStream;
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import nsk.share.*;
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import nsk.share.jvmti.*;
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public class followref001 extends DebugeeClass {
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/** Load native library if required.*/
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static {
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loadLibrary("followref001");
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}
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/** Run test from command line */
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public static void main(String argv[]) {
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argv = nsk.share.jvmti.JVMTITest.commonInit(argv);
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// JCK-compatible exit
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System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE);
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}
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/** Run test from JCK-compatible environment */
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public static int run(String argv[], PrintStream out) {
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return new followref001().runIt(argv, out);
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}
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/* =================================================================== */
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/* scaffold objects */
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ArgumentHandler argHandler = null;
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Log log = null;
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int status = Consts.TEST_PASSED;
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/* constants */
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public static final int DEFAULT_CHAIN_LENGTH = 3;
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/** Tested object */
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public static followref001RootTestedClass rootObject = null;
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/** Run debugee code */
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public int runIt(String argv[], PrintStream out) {
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argHandler = new ArgumentHandler(argv);
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log = new Log(out, argHandler);
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int chainLength = argHandler.findOptionIntValue("objects", DEFAULT_CHAIN_LENGTH);
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log.display("Creating chain of tested objects: " + chainLength + " length");
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rootObject = new followref001RootTestedClass(chainLength);
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log.display("Sync: two object chains created");
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status = checkStatus(status);
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log.display("Cleaning the unreachableChain field");
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/* This is to ensure that it is not GC-ed */
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followref001TestedClass savedChain = rootObject.cleanUnreachable();
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log.display("Sync: 2-nd object chain is unreachable from the root object");
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status = checkStatus(status);
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return status;
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}
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}
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/* =================================================================== */
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/** Class for root tested object */
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class followref001RootTestedClass {
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int length;
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followref001TestedClass reachableChain = null;
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followref001TestedClass unreachableChain = null;
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public followref001RootTestedClass(int length) {
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this.length = length;
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reachableChain = new followref001TestedClass(length);
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unreachableChain = new followref001TestedClass(length);
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reachableChain.setChainTail(length, reachableChain);
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unreachableChain.setChainTail(length, unreachableChain);
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}
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public followref001TestedClass cleanUnreachable() {
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followref001TestedClass chain = unreachableChain;
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unreachableChain = null;
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return chain;
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}
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}
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/** Class for tested chain object */
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class followref001TestedClass {
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followref001TestedClass next = null;
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boolean zz = true;
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byte bb = 127;
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char cc = 'C';
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short ss = 1995;
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int level;
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long jj = 99999999;
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float ff = 3.14f;
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double dd = 3.14d;
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public followref001TestedClass(int length) {
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this.level = length;
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if (length > 1) {
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next = new followref001TestedClass(length - 1);
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}
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}
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public void setChainTail(int length, followref001TestedClass last) {
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if (length > 1) {
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next.setChainTail(length - 1, last);
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} else {
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next = last;
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}
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}
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}
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