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