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 }