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 package gc.epsilon; 25 26 /** 27 * @test TestArraycopyCheckcast 28 * @requires vm.gc.Epsilon 29 * @summary Epsilon is able to handle checkcasted array copies 30 * @library /test/lib 31 * @bug 8215724 32 * 33 * @run main/othervm -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC gc.epsilon.TestArraycopyCheckcast 34 * @run main/othervm -Xmx1g -Xint -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC gc.epsilon.TestArraycopyCheckcast 35 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC gc.epsilon.TestArraycopyCheckcast 36 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC gc.epsilon.TestArraycopyCheckcast 37 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:-TieredCompilation -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC gc.epsilon.TestArraycopyCheckcast 38 */ 39 40 public class TestArraycopyCheckcast { 41 42 static int COUNT = Integer.getInteger("count", 1000); 43 44 public static void main(String[] args) throws Exception { 45 Object[] src = new Object[COUNT]; 46 Object[] dst = new B[COUNT]; 47 48 // Test 1. Copy nulls, should succeed 49 try { 50 System.arraycopy(src, 0, dst, 0, COUNT); 51 } catch (ArrayStoreException e) { 52 throw new IllegalStateException("Should have completed"); 53 } 54 55 // Test 2. Copying incompatible type, should fail 56 for (int c = 0; c < COUNT; c++) { 57 src[c] = new A(); 58 } 59 60 try { 61 System.arraycopy(src, 0, dst, 0, COUNT); 62 throw new IllegalStateException("Should have failed with ArrayStoreException"); 63 } catch (ArrayStoreException e) { 64 // Expected 65 } 66 67 // Test 3. Copying compatible type, should succeeded 68 for (int c = 0; c < COUNT; c++) { 69 src[c] = new C(); 70 } 71 72 try { 73 System.arraycopy(src, 0, dst, 0, COUNT); 74 } catch (ArrayStoreException e) { 75 throw new IllegalStateException("Should have completed"); 76 } 77 78 for (int c = 0; c < COUNT; c++) { 79 if (src[c] != dst[c]) { 80 throw new IllegalStateException("Copy failed at index " + c); 81 } 82 } 83 } 84 85 static class A {} 86 static class B extends A {} 87 static class C extends B {} 88 }