1 /* 2 * Copyright (c) 2016, 2020, 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 24 /* 25 * @test 26 * @modules java.base/jdk.internal.misc 27 * @library /test/lib .. 28 * @build sun.hotspot.WhiteBox 29 * @compile/module=java.base java/lang/ModuleHelper.java 30 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI JVMAddReadsModule 32 */ 33 34 import static jdk.test.lib.Asserts.*; 35 36 public class JVMAddReadsModule { 37 main(String args[])38 public static void main(String args[]) throws Throwable { 39 MyClassLoader from_cl = new MyClassLoader(); 40 MyClassLoader to_cl = new MyClassLoader(); 41 Object from_module, to_module; 42 43 from_module = ModuleHelper.ModuleObject("from_module", from_cl, new String[] { "mypackage" }); 44 assertNotNull(from_module, "Module should not be null"); 45 ModuleHelper.DefineModule(from_module, false, "9.0", "from_module/here", new String[] { "mypackage" }); 46 47 to_module = ModuleHelper.ModuleObject("to_module", to_cl, new String[] { "yourpackage" }); 48 assertNotNull(to_module, "Module should not be null"); 49 ModuleHelper.DefineModule(to_module, false, "9.0", "to_module/here", new String[] { "yourpackage" }); 50 51 // Null from_module argument, expect NPE 52 try { 53 ModuleHelper.AddReadsModule(null, to_module); 54 throw new RuntimeException("Failed to get the expected NPE"); 55 } catch (NullPointerException e) { 56 // Expected 57 } 58 59 // Null to_module argument, expect NPE 60 try { 61 ModuleHelper.AddReadsModule(from_module, null); 62 throw new RuntimeException("Unexpected NPE was thrown"); 63 } catch (NullPointerException e) { 64 // Expected 65 } 66 67 // Null from_module and to_module arguments, expect NPE 68 try { 69 ModuleHelper.AddReadsModule(null, null); 70 throw new RuntimeException("Failed to get the expected NPE"); 71 } catch (NullPointerException e) { 72 // Expected 73 } 74 75 // Both modules are the same, should not throw an exception 76 ModuleHelper.AddReadsModule(from_module, from_module); 77 78 // Duplicate calls, should not throw an exception 79 ModuleHelper.AddReadsModule(from_module, to_module); 80 ModuleHelper.AddReadsModule(from_module, to_module); 81 } 82 83 static class MyClassLoader extends ClassLoader { } 84 } 85