1 /* 2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 /* 25 * @test StringInternCleanup 26 * @summary Check that Shenandoah cleans up interned strings 27 * 28 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx64m -Xms64m -XX:+ShenandoahVerify StringInternCleanup 29 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=static -Xmx64m -Xms64m -XX:+ShenandoahVerify StringInternCleanup 30 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=adaptive -Xmx64m -Xms64m -XX:+ShenandoahVerify StringInternCleanup 31 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=passive -Xmx64m -Xms64m -XX:+ShenandoahVerify StringInternCleanup 32 * 33 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx64m -Xms64m StringInternCleanup 34 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=static -Xmx64m -Xms64m StringInternCleanup 35 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=adaptive -Xmx64m -Xms64m StringInternCleanup 36 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=passive -Xmx64m -Xms64m StringInternCleanup 37 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=compact -Xmx64m -Xms64m StringInternCleanup 38 * @run main/othervm/timeout=480 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -Xmx64m -Xms64m StringInternCleanup 39 */ 40 41 public class StringInternCleanup { 42 43 static final int COUNT = 5_000_000; 44 static final int WINDOW = 1_000; 45 46 static final String[] reachable = new String[WINDOW]; 47 48 public static void main(String[] args) throws Exception { 49 int rIdx = 0; 50 for (int c = 0; c < COUNT; c++) { 51 reachable[rIdx] = ("LargeInternedString" + c).intern(); 52 rIdx++; 53 if (rIdx >= WINDOW) { 54 rIdx = 0; 55 } 56 } 57 } 58 59 }