1 /* 2 * Copyright (c) 2020, 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 /* 26 * @test 27 * @summary Test for Runtime.fieldOffsetOf with 32-bit compressed oops 28 * @library /test/lib 29 * 30 * @run main/othervm -Xmx128m 31 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 32 * -Xint 33 * FieldOffsetOf 34 * 35 * @run main/othervm -Xmx128m 36 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 37 * -XX:TieredStopAtLevel=1 38 * FieldOffsetOf 39 * 40 * @run main/othervm -Xmx128m 41 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 42 * -XX:-TieredCompilation 43 * FieldOffsetOf 44 */ 45 46 /* 47 * @test 48 * @summary Test for Runtime.fieldOffsetOf with zero-based compressed oops 49 * @library /test/lib 50 * @requires vm.bits == 64 51 * 52 * @run main/othervm -Xmx4g 53 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 54 * -Xint 55 * FieldOffsetOf 56 * 57 * @run main/othervm -Xmx4g 58 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 59 * -XX:TieredStopAtLevel=1 60 * FieldOffsetOf 61 * 62 * @run main/othervm -Xmx4g 63 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 64 * -XX:-TieredCompilation 65 * FieldOffsetOf 66 */ 67 68 /* 69 * @test 70 * @summary Test for Runtime.fieldOffsetOf without compressed oops 71 * @library /test/lib 72 * @requires vm.bits == 64 73 * 74 * @run main/othervm -Xmx128m -XX:-UseCompressedOops 75 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 76 * -Xint 77 * FieldOffsetOf 78 * 79 * @run main/othervm -Xmx128m -XX:-UseCompressedOops 80 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 81 * -XX:TieredStopAtLevel=1 82 * FieldOffsetOf 83 * 84 * @run main/othervm -Xmx128m -XX:-UseCompressedOops 85 * -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -Xcheck:jni 86 * -XX:-TieredCompilation 87 * FieldOffsetOf 88 */ 89 90 import java.lang.reflect.Field; 91 import jdk.test.lib.Platform; 92 93 public class FieldOffsetOf { 94 95 public static void main(String ... args) throws Exception { 96 testInstanceOffsets(); 97 testStaticOffsets(); 98 testNulls(); 99 } 100 101 private static void testInstanceOffsets() throws Exception { 102 int expected = Platform.is64bit() ? 12 : 8; 103 104 Field f = Holder.class.getDeclaredField("x"); 105 for (int c = 0; c < RuntimeOfUtil.ITERS; c++) { 106 RuntimeOfUtil.assertEquals(expected, Runtime.fieldOffsetOf(f)); 107 } 108 } 109 110 private static void testStaticOffsets() throws Exception { 111 Field f = Holder.class.getDeclaredField("staticX"); 112 for (int c = 0; c < RuntimeOfUtil.ITERS; c++) { 113 RuntimeOfUtil.assertNotEquals(0, Runtime.fieldOffsetOf(f)); 114 RuntimeOfUtil.assertNotEquals(-1, Runtime.fieldOffsetOf(f)); 115 } 116 } 117 118 private static void testNulls() { 119 for (int c = 0; c < RuntimeOfUtil.ITERS; c++) { 120 try { 121 Runtime.fieldOffsetOf(null); 122 RuntimeOfUtil.assertFail(); 123 } catch (NullPointerException e) { 124 // expected 125 } 126 } 127 } 128 129 static class Holder { 130 static int staticX; 131 int x; 132 } 133 134 }