1 /* 2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. 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 TestStringInternCleanup 26 * @summary Check that Shenandoah cleans up interned strings 27 * @key gc 28 * @requires vm.gc.Shenandoah & !vm.graal.enabled 29 * 30 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 31 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 32 * -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify 33 * TestStringInternCleanup 34 * 35 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 36 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 37 * -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify 38 * TestStringInternCleanup 39 * 40 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 41 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 42 * -XX:+ShenandoahDegeneratedGC 43 * TestStringInternCleanup 44 * 45 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 46 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 47 * -XX:-ShenandoahDegeneratedGC 48 * TestStringInternCleanup 49 */ 50 51 /* 52 * @test TestStringInternCleanup 53 * @summary Check that Shenandoah cleans up interned strings 54 * @key gc 55 * @requires vm.gc.Shenandoah & !vm.graal.enabled 56 * 57 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 58 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive 59 * TestStringInternCleanup 60 * 61 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 62 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive 63 * -XX:+ShenandoahVerify 64 * TestStringInternCleanup 65 * 66 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 67 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive 68 * TestStringInternCleanup 69 * 70 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 71 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact 72 * TestStringInternCleanup 73 * 74 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:-ClassUnloadingWithConcurrentMark 75 * -XX:+UseShenandoahGC 76 * TestStringInternCleanup 77 */ 78 79 /* 80 * @test TestStringInternCleanup 81 * @summary Check that Shenandoah cleans up interned strings 82 * @key gc 83 * @requires vm.gc.Shenandoah & !vm.graal.enabled 84 * 85 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 86 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu 87 * -XX:+ShenandoahVerify 88 * TestStringInternCleanup 89 * 90 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 91 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive 92 * -XX:+ShenandoahVerify 93 * TestStringInternCleanup 94 * 95 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark 96 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu 97 * TestStringInternCleanup 98 */ 99 100 public class TestStringInternCleanup { 101 102 static final int COUNT = 1_000_000; 103 static final int WINDOW = 1_000; 104 105 static final String[] reachable = new String[WINDOW]; 106 107 public static void main(String[] args) throws Exception { 108 int rIdx = 0; 109 for (int c = 0; c < COUNT; c++) { 110 reachable[rIdx] = ("LargeInternedString" + c).intern(); 111 rIdx++; 112 if (rIdx >= WINDOW) { 113 rIdx = 0; 114 } 115 } 116 } 117 118 }