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/*
* Copyright (c) 2015, 2017, 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.
*
*/
import sun.hotspot.WhiteBox;
public class HelloStringGC {
public static String[] array01 = new String[1000];
public static String[] array02 = new String[1000];
public static void main(String args[]) throws RuntimeException {
String testString1 = "shared_test_string_unique_14325";
String testString2 = "test123";
WhiteBox wb = WhiteBox.getWhiteBox();
if (!wb.isShared(testString1) && !wb.areSharedStringsIgnored()) {
throw new RuntimeException("testString1 is not shared");
}
for (int i=0; i<5; i++) {
allocSomeStrings(testString1, testString2);
array01 = null;
array02 = null;
System.gc();
sleep(300);
array01 = new String[1000];
array02 = new String[1000];
}
wb.fullGC();
System.out.println("HelloStringGC: PASS");
}
private static void allocSomeStrings(String s1, String s2) {
for (int i = 0; i < 1000; i ++) {
array01[i] = new String(s1);
array02[i] = new String(s2);
}
}
private static void sleep(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
}
}
}
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