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 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify StringInternCleanup 29 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify StringInternCleanup 30 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC StringInternCleanup 31 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC StringInternCleanup 32 * 33 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=aggressive StringInternCleanup 34 35 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=adaptive -XX:+ShenandoahVerify StringInternCleanup 36 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=static -XX:+ShenandoahVerify StringInternCleanup 37 * 38 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=adaptive StringInternCleanup 39 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=static StringInternCleanup 40 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark -Xmx64m -XX:ShenandoahGCHeuristics=compact StringInternCleanup 41 * 42 * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:-ClassUnloadingWithConcurrentMark -Xmx64m StringInternCleanup 43 */ 44 45 public class StringInternCleanup { 46 47 static final int COUNT = 1_000_000; 48 static final int WINDOW = 1_000; 49 50 static final String[] reachable = new String[WINDOW]; 51 52 public static void main(String[] args) throws Exception { 53 int rIdx = 0; 54 for (int c = 0; c < COUNT; c++) { 55 reachable[rIdx] = ("LargeInternedString" + c).intern(); 56 rIdx++; 57 if (rIdx >= WINDOW) { 58 rIdx = 0; 59 } 60 } 61 } 62 63 }