1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5  * in compliance with the License. You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the License
10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11  * or implied. See the License for the specific language governing permissions and limitations under
12  * the License.
13  */
14 package lockedregioncodeinjection;
15 
16 import java.io.BufferedInputStream;
17 import java.io.FileOutputStream;
18 import java.io.IOException;
19 import java.io.InputStream;
20 import java.io.OutputStream;
21 import java.util.Collections;
22 import java.util.Enumeration;
23 import java.util.List;
24 import java.util.zip.ZipEntry;
25 import java.util.zip.ZipFile;
26 import java.util.zip.ZipOutputStream;
27 import org.objectweb.asm.ClassReader;
28 import org.objectweb.asm.ClassWriter;
29 
30 public class Main {
main(String[] args)31     public static void main(String[] args) throws IOException {
32         String inJar = null;
33         String outJar = null;
34 
35         String legacyTargets = null;
36         String legacyPreMethods = null;
37         String legacyPostMethods = null;
38         for (int i = 0; i < args.length; i++) {
39             if ("-i".equals(args[i].trim())) {
40                 i++;
41                 inJar = args[i].trim();
42             } else if ("-o".equals(args[i].trim())) {
43                 i++;
44                 outJar = args[i].trim();
45             } else if ("--targets".equals(args[i].trim())) {
46                 i++;
47                 legacyTargets = args[i].trim();
48             } else if ("--pre".equals(args[i].trim())) {
49                 i++;
50                 legacyPreMethods = args[i].trim();
51             } else if ("--post".equals(args[i].trim())) {
52                 i++;
53                 legacyPostMethods = args[i].trim();
54             }
55 
56         }
57 
58         // TODO(acleung): Better help message than asserts.
59         assert inJar != null;
60         assert outJar != null;
61         assert legacyTargets == null || (legacyPreMethods != null && legacyPostMethods != null);
62 
63         ZipFile zipSrc = new ZipFile(inJar);
64         ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(outJar));
65         List<LockTarget> targets = null;
66         if (legacyTargets != null) {
67             targets = Utils.getTargetsFromLegacyJackConfig(legacyTargets, legacyPreMethods,
68                     legacyPostMethods);
69         } else {
70             targets = Collections.emptyList();
71         }
72 
73         Enumeration<? extends ZipEntry> srcEntries = zipSrc.entries();
74         while (srcEntries.hasMoreElements()) {
75             ZipEntry entry = srcEntries.nextElement();
76             ZipEntry newEntry = new ZipEntry(entry.getName());
77             zos.putNextEntry(newEntry);
78             BufferedInputStream bis = new BufferedInputStream(zipSrc.getInputStream(entry));
79 
80             if (entry.getName().endsWith(".class")) {
81                 convert(bis, zos, targets);
82             } else {
83                 while (bis.available() > 0) {
84                     zos.write(bis.read());
85                 }
86                 zos.closeEntry();
87                 bis.close();
88             }
89         }
90         zos.finish();
91         zos.close();
92         zipSrc.close();
93     }
94 
convert(InputStream in, OutputStream out, List<LockTarget> targets)95     private static void convert(InputStream in, OutputStream out, List<LockTarget> targets)
96             throws IOException {
97         ClassReader cr = new ClassReader(in);
98         ClassWriter cw = new ClassWriter(0);
99         LockFindingClassVisitor cv = new LockFindingClassVisitor(targets, cw);
100         cr.accept(cv, 0);
101         byte[] data = cw.toByteArray();
102         out.write(data);
103     }
104 }
105