1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5  * This code is free software; you can redistribute it and/or modify it
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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
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22  */
23 
24 /*
25  * @test
26  * @summary Test StringSharingPluginTest
27  * @author Jean-Francois Denise
28  * @library ../../lib
29  * @modules java.base/jdk.internal.jimage
30  *          java.base/jdk.internal.jimage.decompressor
31  *          jdk.jlink/jdk.tools.jlink.internal
32  *          jdk.jlink/jdk.tools.jlink.internal.plugins
33  *          jdk.jlink/jdk.tools.jlink.plugin
34  *          jdk.jlink/jdk.tools.jmod
35  *          jdk.jlink/jdk.tools.jimage
36  *          jdk.jdeps/com.sun.tools.classfile
37  *          jdk.compiler
38  * @run build tests.*
39  * @run main StringSharingPluginTest
40  */
41 
42 import java.io.IOException;
43 import java.io.UncheckedIOException;
44 import java.nio.ByteBuffer;
45 import java.nio.ByteOrder;
46 import java.nio.file.Files;
47 import java.nio.file.Path;
48 import java.util.Arrays;
49 import java.util.HashMap;
50 import java.util.List;
51 import java.util.Map;
52 import java.util.function.Consumer;
53 
54 import jdk.internal.jimage.decompressor.CompressedResourceHeader;
55 import jdk.internal.jimage.decompressor.StringSharingDecompressor;
56 import jdk.tools.jlink.internal.ResourcePoolManager;
57 import jdk.tools.jlink.internal.StringTable;
58 import jdk.tools.jlink.internal.plugins.StringSharingPlugin;
59 import jdk.tools.jlink.plugin.ResourcePoolEntry;
60 import jdk.tools.jlink.plugin.ResourcePool;
61 import jdk.tools.jlink.plugin.Plugin;
62 import tests.Helper;
63 import tests.JImageValidator;
64 
65 public class StringSharingPluginTest {
66 
67     private static int strID = 1;
68 
main(String[] args)69     public static void main(String[] args) throws Exception {
70         Helper helper = Helper.newHelper();
71         if (helper == null) {
72             // Skip test if the jmods directory is missing (e.g. exploded image)
73             System.err.println("Test not run, NO jmods directory");
74             return;
75         }
76 
77         List<String> classes = Arrays.asList("toto.Main", "toto.com.foo.bar.X");
78         Path compiledClasses = helper.generateModuleCompiledClasses(
79                 helper.getJmodSrcDir(), helper.getJmodClassesDir(), "composite2", classes);
80 
81         Map<String, Integer> map = new HashMap<>();
82         Map<Integer, String> reversedMap = new HashMap<>();
83 
84         ResourcePoolManager resources = new ResourcePoolManager(ByteOrder.nativeOrder(), new StringTable() {
85             @Override
86             public int addString(String str) {
87                 Integer id = map.get(str);
88                 if (id == null) {
89                     id = strID;
90                     map.put(str, id);
91                     reversedMap.put(id, str);
92                     strID += 1;
93                 }
94                 return id;
95             }
96 
97             @Override
98             public String getString(int id) {
99                 throw new UnsupportedOperationException("Not supported yet.");
100             }
101         });
102         Consumer<Path> c = (p) -> {
103             // take only the .class resources.
104             if (Files.isRegularFile(p) && p.toString().endsWith(".class")
105                     && !p.toString().endsWith("module-info.class")) {
106                 try {
107                     byte[] content = Files.readAllBytes(p);
108                     String path = p.toString().replace('\\', '/');
109                     path = path.substring("/modules".length());
110                     if (path.charAt(0) != '/') {
111                         path = "/" + path;
112                     }
113                     ResourcePoolEntry res = ResourcePoolEntry.create(path, content);
114                     resources.add(res);
115                 } catch (Exception ex) {
116                     throw new RuntimeException(ex);
117                 }
118             }
119         };
120         try (java.util.stream.Stream<Path> stream = Files.walk(compiledClasses)) {
121             stream.forEach(c);
122         }
123         Plugin plugin = new StringSharingPlugin();
124         ResourcePoolManager resultMgr = new ResourcePoolManager(resources.byteOrder(), resources.getStringTable());
125         ResourcePool result = plugin.transform(resources.resourcePool(), resultMgr.resourcePoolBuilder());
126 
127         if (result.isEmpty()) {
128             throw new AssertionError("No result");
129         }
130 
131         result.entries().forEach(res -> {
132             if (res.path().endsWith(".class")) {
133                 try {
134                     byte[] uncompacted = StringSharingDecompressor.normalize(reversedMap::get, res.contentBytes(),
135                         CompressedResourceHeader.getSize());
136                     JImageValidator.readClass(uncompacted);
137                 } catch (IOException exp) {
138                     throw new UncheckedIOException(exp);
139                 }
140             }
141         });
142     }
143 }
144