1 /* 2 * Copyright (c) 2018, 2021, Oracle and/or its affiliates. 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 package runtime.valhalla.inlinetypes; 24 25 26 import jdk.test.lib.Asserts; 27 28 /* 29 * @test 30 * @summary Flattenable field semantic test 31 * @library /test/lib 32 * @compile -XDenablePrimitiveClasses Point.java JumboInline.java FlattenableSemanticTest.java 33 * @run main/othervm -XX:+EnableValhalla -XX:+EnablePrimitiveClasses -XX:InlineFieldMaxFlatSize=64 runtime.valhalla.inlinetypes.FlattenableSemanticTest 34 * @run main/othervm -XX:+EnableValhalla -XX:+EnablePrimitiveClasses -XX:+UnlockDiagnosticVMOptions -XX:ForceNonTearable=* runtime.valhalla.inlinetypes.FlattenableSemanticTest 35 * // debug: -XX:+PrintInlineLayout -XX:-ShowMessageBoxOnError 36 */ 37 public class FlattenableSemanticTest { 38 39 static Point.ref nfsp; 40 static Point fsp; 41 42 Point.ref nfip; 43 Point fip; 44 45 static JumboInline.ref nfsj; 46 static JumboInline fsj; 47 48 JumboInline.ref nfij; 49 JumboInline fij; 50 51 static Object getNull() { 52 return null; 53 } 54 55 FlattenableSemanticTest() { } 56 57 public static void main(String[] args) { 58 FlattenableSemanticTest test = new FlattenableSemanticTest(); 59 60 // Uninitialized inline fields must be null for non flattenable fields 61 Asserts.assertNull(nfsp, "Invalid non null value for unitialized non flattenable field"); 62 Asserts.assertNull(nfsj, "Invalid non null value for unitialized non flattenable field"); 63 Asserts.assertNull(test.nfip, "Invalid non null value for unitialized non flattenable field"); 64 Asserts.assertNull(test.nfij, "Invalid non null value for unitialized non flattenable field"); 65 66 // fsp.equals(null); 67 68 // Uninitialized inline fields must be non null for flattenable fields 69 Asserts.assertNotNull(fsp, "Invalid null value for unitialized flattenable field"); 70 Asserts.assertNotNull(fsj, "Invalid null value for unitialized flattenable field"); 71 Asserts.assertNotNull(test.fip, "Invalid null value for unitialized flattenable field"); 72 Asserts.assertNotNull(test.fij, "Invalid null value for unitialized flattenable field"); 73 74 // Assigning null must be allowed for non flattenable inline fields 75 boolean exception = true; 76 try { 77 nfsp = (Point.ref)getNull(); 78 nfsp = null; 79 exception = false; 80 } catch (NullPointerException e) { 81 exception = true; 82 } 83 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field"); 84 85 try { 86 nfsj = (JumboInline.ref)getNull(); 87 nfsj = null; 88 exception = false; 89 } catch (NullPointerException e) { 90 exception = true; 91 } 92 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field"); 93 94 try { 95 test.nfip = (Point.ref)getNull(); 96 test.nfip = null; 97 exception = false; 98 } catch (NullPointerException e) { 99 exception = true; 100 } 101 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field"); 102 103 try { 104 test.nfij = (JumboInline.ref)getNull(); 105 test.nfij = null; 106 exception = false; 107 } catch (NullPointerException e) { 108 exception = true; 109 } 110 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field"); 111 112 // Assigning null to a flattenable inline field must trigger a NPE 113 exception = false; 114 try { 115 fsp = (Point)getNull(); 116 } catch(NullPointerException e) { 117 exception = true; 118 } 119 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field"); 120 exception = false; 121 try { 122 fsj = (JumboInline)getNull(); 123 } catch(NullPointerException e) { 124 exception = true; 125 } 126 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field"); 127 exception = false; 128 try { 129 test.fip = (Point)getNull(); 130 } catch(NullPointerException e) { 131 exception = true; 132 } 133 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field"); 134 exception = false; 135 try { 136 test.fij = (JumboInline)getNull(); 137 } catch(NullPointerException e) { 138 exception = true; 139 } 140 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field"); 141 exception = false; 142 } 143 144 }