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  *
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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23 
24 /*
25  * @test
26  * @bug 8023668
27  * @summary Desugar serializable lambda bodies using more robust naming scheme
28  * @library /tools/javac/lib
29  * @build ToolBox
30  * @run main TestSerializedLambdaNameStability
31  */
32 
33 import java.io.*;
34 import java.lang.reflect.Constructor;
35 import java.lang.reflect.InvocationTargetException;
36 import java.lang.reflect.Method;
37 import java.nio.file.*;
38 
39 public class TestSerializedLambdaNameStability {
40 
41     final ClassLoader writingClassLoader;
42     final ClassLoader clonedClassLoader;
43     final ClassLoader checkingClassLoader;
44 
TestSerializedLambdaNameStability()45     TestSerializedLambdaNameStability()  {
46         writingClassLoader = new TestClassLoader("before");
47         clonedClassLoader = new TestClassLoader("before");
48         checkingClassLoader = new TestClassLoader("after");
49     }
50 
main(String... args)51     public static void main(String... args) throws Exception {
52         new TestSerializedLambdaNameStability().doit("NameOfCapturedArgs", true);
53         new TestSerializedLambdaNameStability().doit("TypesOfCapturedArgs", true);
54         new TestSerializedLambdaNameStability().doit("OrderOfCapturedArgs", true);
55         new TestSerializedLambdaNameStability().doit("VariableAssignmentTarget", false);
56         new TestSerializedLambdaNameStability().doit("TargetName", true);
57         new TestSerializedLambdaNameStability().doit("TargetType", true);
58     }
59 
doit(String name, boolean expectFail)60     public void doit(String name, boolean expectFail) throws Exception {
61         String iName = "I" + name;
62         String testName = "TEST" + name;
63         Class<?> kw = writingClassLoader.loadClass(testName);
64         Object instw = getInstance(kw);
65         Method mw = getMethod(kw, "write", ObjectOutput.class);
66         ByteArrayOutputStream baos = new ByteArrayOutputStream();
67         try (ObjectOutput out = new ObjectOutputStream(baos)) {
68             mw.invoke(instw, out);
69         }
70         byte[] ser = baos.toByteArray();
71 
72         // Read and check clone
73         readCheck(iName, testName, clonedClassLoader, ser);
74         System.err.printf("cloned test readCheck %s\n", testName);
75 
76         // Read and check other
77         if (expectFail) {
78             try {
79                 readCheck(iName, testName, checkingClassLoader, ser);
80             } catch (InvocationTargetException ite) {
81                 Throwable underlying = ite;
82                 while (underlying != null && !(underlying instanceof IllegalArgumentException)) {
83                     underlying = underlying.getCause();
84                 }
85                 if (underlying != null) {
86                     if (underlying.getMessage().contains("deserialization")) {
87                         System.err.printf("PASS: other test %s got expected exception %s\n", testName, underlying);
88                         return;
89                     }
90                 }
91                 System.err.printf("FAIL: other test %s got unexpected exception %s\n", testName, ite);
92                 throw new Exception("unexpected exception ", ite);
93             }
94             System.err.printf("FAIL: other test %s expected an exception", testName);
95             throw new Exception("expected an exception" + testName);
96         } else {
97             readCheck(iName, testName, checkingClassLoader, ser);
98             System.err.printf("PASS: other test %s readCheck\n", testName);
99         }
100     }
101 
readCheck(String iName, String testName, ClassLoader loader, byte[] ser)102     void readCheck(String iName, String testName, ClassLoader loader, byte[] ser) throws Exception {
103         Class<?> k = loader.loadClass(testName);
104         Object inst = getInstance(k);
105         Method mrc = getMethod(k, "readCheck", ObjectInput.class);
106         ByteArrayInputStream bais = new ByteArrayInputStream(ser);
107         try (ObjectInput in = new ObjectInputStream(bais)) {
108             mrc.invoke(inst, in);
109         }
110     }
111 
getMethod(Class<?> k, String name, Class<?> argTypes)112     Method getMethod(Class<?> k, String name, Class<?> argTypes) throws Exception {
113         Method meth = k.getDeclaredMethod(name, argTypes);
114         meth.setAccessible(true);
115         return meth;
116     }
117 
getInstance(Class<?> k)118     Object getInstance(Class<?> k) throws Exception {
119         Constructor<?> cons = k.getConstructors()[0];
120         cons.setAccessible(true);
121         return cons.newInstance();
122     }
123 
124     static class TestClassLoader extends ClassLoader  {
125         static final String compiledDir = System.getProperty("user.dir");
126         static final String sourceBaseDir = System.getProperty("test.src");
127 
128         final String context;
129 
TestClassLoader(String context)130         public TestClassLoader(String context) {
131             super();
132             this.context = context;
133         }
134 
135         @Override
findClass(String name)136         public Class findClass(String name) throws ClassNotFoundException {
137             byte[] b;
138 
139             try {
140                 b = loadClassData(name);
141             } catch (Throwable th) {
142                 // th.printStackTrace();
143                 throw new ClassNotFoundException("Loading error", th);
144             }
145             return defineClass(name, b, 0, b.length);
146         }
147 
loadClassData(String name)148         private byte[] loadClassData(String name) throws Exception {
149             String srcName;
150             if (name.startsWith("TEST"))
151                 srcName = name;
152             else if (name.startsWith("I"))
153                 srcName = "TEST" + name.substring(1);
154             else
155                 throw new Exception("Did not expect to load " + name);
156             Path srcFile = Paths.get(sourceBaseDir, context, srcName + ".java");
157             String testSource = new String(Files.readAllBytes(srcFile));
158             ToolBox.JavaToolArgs javacSuccessArgs =
159                     new ToolBox.JavaToolArgs().setSources(testSource);
160             ToolBox.javac(javacSuccessArgs);
161             Path cfFile = Paths.get(compiledDir, name + ".class");
162             byte[] bytes = Files.readAllBytes(cfFile);
163             return bytes;
164         }
165     }
166 }
167