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.lang.reflect.Layer;
31 import java.net.URI;
32 import java.nio.file.FileSystem;
33 import java.nio.file.FileSystems;
34 import java.nio.file.Files;
35 import java.nio.file.Path;
36 import java.util.Collections;
37 import java.util.Set;
38
39 import jdk.internal.module.ClassFileAttributes;
40 import jdk.internal.module.ClassFileAttributes.ModuleTargetAttribute;
41 import jdk.internal.module.ClassFileConstants;
42 import jdk.internal.org.objectweb.asm.Attribute;
43 import jdk.internal.org.objectweb.asm.ClassReader;
44 import jdk.internal.org.objectweb.asm.ClassVisitor;
45 import jdk.internal.org.objectweb.asm.Opcodes;
46
47 public class Main {
48 private static boolean hasModuleTarget(InputStream in) throws IOException {
49 ModuleTargetAttribute[] modTargets = new ModuleTargetAttribute[1];
50 ClassVisitor cv = new ClassVisitor(Opcodes.ASM5) {
51 @Override
52 public void visitAttribute(Attribute attr) {
53 if (attr instanceof ModuleTargetAttribute) {
54 modTargets[0] = (ModuleTargetAttribute)attr;
55 }
56 }
57 };
58
59 // prototype of attributes that should be parsed
60 Attribute[] attrs = new Attribute[] {
61 new ModuleTargetAttribute()
62 };
63
64 // parse module-info.class
65 ClassReader cr = new ClassReader(in);
66 cr.accept(cv, attrs, 0);
67 return modTargets[0] != null &&
68 (modTargets[0].osName() != null || modTargets[0].osArch() != null);
69 }
70
71 private static boolean hasModuleTarget(String modName) throws IOException {
72 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"),
73 Collections.emptyMap());
74 Path path = fs.getPath("/", "modules", modName, "module-info.class");
75 try (InputStream in = Files.newInputStream(path)) {
76 return hasModuleTarget(in);
77 }
78 }
79
80 // the system module plugin by default drops ModuleTarget attribute
81 private static boolean expectModuleTarget = false;
82 public static void main(String... args) throws IOException {
83 if (args.length > 0) {
84 if (!args[0].equals("retainModuleTarget")) {
85 throw new IllegalArgumentException(args[0]);
86 }
87
88 expectModuleTarget = true;
89 }
90
91 // java.base is packaged with osName/osArch/osVersion
92 if (! hasModuleTarget("java.base")) {
93 throw new RuntimeException("ModuleTarget absent for java.base");
94 }
95
96 // verify module-info.class for m1 and m4
97 checkModule("m1", "p1", "p2");
98 checkModule("m4", "p4");
99 }
100
101 private static void checkModule(String mn, String... packages) throws IOException {
102 // verify ModuleDescriptor from the runtime module
103 ModuleDescriptor md = Layer.boot().findModule(mn).get()
104 .getDescriptor();
105 checkModuleDescriptor(md, packages);
106
107 // verify ModuleDescriptor from module-info.class read from ModuleReader
108 try (InputStream in = ModuleFinder.ofSystem().find(mn).get()
109 .open().open("module-info.class").get()) {
110 checkModuleDescriptor(ModuleDescriptor.read(in), packages);
111 }
112
113 // verify ModuleDescriptor from module-info.class read from jimage
114 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"),
115 Collections.emptyMap());
116 Path path = fs.getPath("/", "modules", mn, "module-info.class");
117 checkModuleDescriptor(ModuleDescriptor.read(Files.newInputStream(path)), packages);
118 }
119
120 static void checkModuleDescriptor(ModuleDescriptor md, String... packages) throws IOException {
121 String mainClass = md.name().replace('m', 'p') + ".Main";
122 if (!md.mainClass().get().equals(mainClass)) {
123 throw new RuntimeException(md.mainClass().toString());
124 }
125
126 if (expectModuleTarget) {
127 // ModuleTarget attribute is retained
128 if (! hasModuleTarget(md.name())) {
129 throw new RuntimeException("ModuleTarget missing for " + md.name());
130 }
131 } else {
132 // by default ModuleTarget attribute is dropped
133 if (hasModuleTarget(md.name())) {
134 throw new RuntimeException("ModuleTarget present for " + md.name());
135 }
136 }
137
138 Set<String> pkgs = md.packages();
139 if (!pkgs.equals(Set.of(packages))) {
140 throw new RuntimeException(pkgs + " expected: " + Set.of(packages));
141 }
142 }
143 }