1 /* 2 * Copyright (c) 2017, 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 package p4; 25 26 import java.io.IOException; 27 import java.io.InputStream; 28 import java.lang.module.ModuleDescriptor; 29 import java.lang.module.ModuleFinder; 30 import java.net.URI; 31 import java.nio.file.FileSystem; 32 import java.nio.file.FileSystems; 33 import java.nio.file.Files; 34 import java.nio.file.Path; 35 import java.util.Map; 36 import java.util.Set; 37 38 import jdk.internal.module.ClassFileAttributes; 39 import jdk.internal.module.ClassFileAttributes.ModuleTargetAttribute; 40 import jdk.internal.module.ClassFileConstants; 41 import jdk.internal.org.objectweb.asm.Attribute; 42 import jdk.internal.org.objectweb.asm.ClassReader; 43 import jdk.internal.org.objectweb.asm.ClassVisitor; 44 import jdk.internal.org.objectweb.asm.Opcodes; 45 46 public class Main { 47 private static boolean hasModuleTarget(InputStream in) throws IOException { 48 ModuleTargetAttribute[] modTargets = new ModuleTargetAttribute[1]; 49 ClassVisitor cv = new ClassVisitor(Opcodes.ASM5) { 50 @Override 51 public void visitAttribute(Attribute attr) { 52 if (attr instanceof ModuleTargetAttribute) { 53 modTargets[0] = (ModuleTargetAttribute)attr; 54 } 55 } 56 }; 57 58 // prototype of attributes that should be parsed 59 Attribute[] attrs = new Attribute[] { 60 new ModuleTargetAttribute() 61 }; 62 63 // parse module-info.class 64 ClassReader cr = new ClassReader(in); 65 cr.accept(cv, attrs, 0); 66 return modTargets[0] != null && modTargets[0].targetPlatform() != null; 67 } 68 69 private static boolean hasModuleTarget(String modName) throws IOException { 70 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), Map.of()); 71 Path path = fs.getPath("/", "modules", modName, "module-info.class"); 72 try (InputStream in = Files.newInputStream(path)) { 73 return hasModuleTarget(in); 74 } 75 } 76 77 // the system module plugin by default drops ModuleTarget attribute 78 private static boolean expectModuleTarget = false; 79 public static void main(String... args) throws IOException { 80 if (args.length > 0) { 81 if (!args[0].equals("retainModuleTarget")) { 82 throw new IllegalArgumentException(args[0]); 83 } 84 85 expectModuleTarget = true; 86 } 87 88 // java.base is packaged with ModuleTarget 89 if (!hasModuleTarget("java.base")) { 90 throw new RuntimeException("ModuleTarget absent for java.base"); 91 } 92 93 // verify module-info.class for m1 and m4 94 checkModule("m1", "p1", "p2"); 95 checkModule("m4", "p4"); 96 } 97 98 private static void checkModule(String mn, String... packages) throws IOException { 99 // verify ModuleDescriptor from the runtime module 100 ModuleDescriptor md = ModuleLayer.boot().findModule(mn).get() 101 .getDescriptor(); 102 checkModuleDescriptor(md, packages); 103 104 // verify ModuleDescriptor from module-info.class read from ModuleReader 105 try (InputStream in = ModuleFinder.ofSystem().find(mn).get() 106 .open().open("module-info.class").get()) { 107 checkModuleDescriptor(ModuleDescriptor.read(in), packages); 108 } 109 110 // verify ModuleDescriptor from module-info.class read from jimage 111 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), Map.of()); 112 Path path = fs.getPath("/", "modules", mn, "module-info.class"); 113 checkModuleDescriptor(ModuleDescriptor.read(Files.newInputStream(path)), packages); 114 } 115 116 static void checkModuleDescriptor(ModuleDescriptor md, String... packages) throws IOException { 117 String mainClass = md.name().replace('m', 'p') + ".Main"; 118 if (!md.mainClass().get().equals(mainClass)) { 119 throw new RuntimeException(md.mainClass().toString()); 120 } 121 122 // ModuleTarget attribute should be present 123 if (!hasModuleTarget(md.name())) { 124 throw new RuntimeException("ModuleTarget missing for " + md.name()); 125 } 126 127 Set<String> pkgs = md.packages(); 128 if (!pkgs.equals(Set.of(packages))) { 129 throw new RuntimeException(pkgs + " expected: " + Set.of(packages)); 130 } 131 } 132 }