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