1 /* 2 * Copyright (c) 2019, Red Hat, Inc. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test TestArraycopyCheckcast 26 * @key gc 27 * @requires vm.gc.Epsilon & !vm.graal.enabled 28 * @summary Epsilon is able to handle checkcasted array copies 29 * @library /test/lib 30 * @bug 8215724 31 * 32 * @run main/othervm -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestArraycopyCheckcast 33 * @run main/othervm -Xmx1g -Xint -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestArraycopyCheckcast 34 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestArraycopyCheckcast 35 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestArraycopyCheckcast 36 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:-TieredCompilation -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestArraycopyCheckcast 37 */ 38 39 import java.util.Random; 40 41 public class TestArraycopyCheckcast { 42 43 static int COUNT = Integer.getInteger("count", 1000); 44 45 public static void main(String[] args) throws Exception { 46 Object[] src = new Object[COUNT]; 47 Object[] dst = new B[COUNT]; 48 49 // Test 1. Copy nulls, should succeed 50 try { 51 System.arraycopy(src, 0, dst, 0, COUNT); 52 } catch (ArrayStoreException e) { 53 throw new IllegalStateException("Should have completed"); 54 } 55 56 // Test 2. Copying incompatible type, should fail 57 for (int c = 0; c < COUNT; c++) { 58 src[c] = new A(); 59 } 60 61 try { 62 System.arraycopy(src, 0, dst, 0, COUNT); 63 throw new IllegalStateException("Should have failed with ArrayStoreException"); 64 } catch (ArrayStoreException e) { 65 // Expected 66 } 67 68 // Test 3. Copying compatible type, should succeeded 69 for (int c = 0; c < COUNT; c++) { 70 src[c] = new C(); 71 } 72 73 try { 74 System.arraycopy(src, 0, dst, 0, COUNT); 75 } catch (ArrayStoreException e) { 76 throw new IllegalStateException("Should have completed"); 77 } 78 79 for (int c = 0; c < COUNT; c++) { 80 if (src[c] != dst[c]) { 81 throw new IllegalStateException("Copy failed at index " + c); 82 } 83 } 84 } 85 86 static class A {} 87 static class B extends A {} 88 static class C extends B {} 89 }