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32 package net.sf.retrotranslator.transformer;
33
34 import java.util.*;
35 import net.sf.retrotranslator.runtime.asm.*;
36 import net.sf.retrotranslator.runtime.impl.*;
37
38
41 class ReferenceVerifyingVisitor extends GenericClassVisitor {
42
43 private ClassReaderFactory factory;
44 private SystemLogger logger;
45 private Set<String  > warnings;
46
47 public ReferenceVerifyingVisitor(ClassReaderFactory factory, SystemLogger logger) {
48 super(new EmptyVisitor());
49 this.factory = factory;
50 this.logger = logger;
51 }
52
53 public int verify(byte[] bytes) {
54 warnings = new LinkedHashSet<String >();
55 new ClassReader(bytes).accept(this, true);
56 return warnings.size();
57 }
58
59 protected String typeName(String s) {
60 if (s == null) return null;
61 try {
62 factory.getClassReader(s);
63 } catch (ClassNotFoundException e) {
64 println("Class not found: " + getClassInfo(e.getMessage()));
65 }
66 return s;
67 }
68
69 protected void visitFieldInstruction(MethodVisitor visitor, int opcode, String owner, String name, String desc) {
70 super.visitFieldInstruction(visitor, opcode, owner, name, desc);
71 boolean stat = (opcode == Opcodes.GETSTATIC || opcode == Opcodes.PUTSTATIC);
72 try {
73 int found = new MemberFinder(factory, false, stat, name, desc).findIn(owner, null);
74 if (found == 0) {
75 println(getFieldInfo(owner, stat, name, desc, "not found"));
76 } else if (found > 1) {
77 println(getFieldInfo(owner, stat, name, desc, "duplicated"));
78 }
79 } catch (ClassNotFoundException e) {
80 cannotVerify(getFieldInfo(owner, stat, name, desc, "not verified"), e);
81 }
82 }
83
84 protected void visitMethodInstruction(MethodVisitor visitor, int opcode, String owner, String name, String desc) {
85 super.visitMethodInstruction(visitor, opcode, owner, name, desc);
86 if (owner.startsWith("[")) return;
87 boolean stat = (opcode == Opcodes.INVOKESTATIC);
88 try {
89 int found = new MemberFinder(factory, true, stat, name, desc).findIn(owner, null);
90 if (found == 0) {
91 println(getMethodInfo(owner, stat, name, desc, "not found"));
92 } else if (found > 1) {
93 println(getMethodInfo(owner, stat, name, desc, "duplicated"));
94 }
95 } catch (ClassNotFoundException e) {
96 cannotVerify(getMethodInfo(owner, stat, name, desc, "not verified"), e);
97 }
98 }
99
100 private void cannotVerify(String text, ClassNotFoundException e) {
101 println(text + " (class not found: " + getClassInfo(e.getMessage()) + ")");
102 }
103
104 private void println(String text) {
105 if (!warnings.contains(text)) {
106 warnings.add(text);
107 logger.logForFile(Level.WARNING, text);
108 }
109 }
110
111 private static String getClassInfo(String name) {
112 return name.replace('/', '.');
113 }
114
115 private static String getFieldInfo(String owner, boolean stat, String name, String desc, String message) {
116 StringBuffer buffer = new StringBuffer ("Field ").append(message).append(": ");
117 if (stat) buffer.append("static ");
118 buffer.append(Type.getType(desc).getClassName()).append(' ');
119 buffer.append(getClassInfo(owner)).append('.').append(name);
120 return buffer.toString();
121 }
122
123 private static String getMethodInfo(String owner, boolean stat, String name, String desc, String message) {
124 StringBuffer buffer = new StringBuffer ();
125 if (name.equals(RuntimeTools.CONSTRUCTOR_NAME)) {
126 buffer.append("Constructor ").append(message).append(": ");
127 buffer.append(getClassInfo(owner));
128 } else {
129 buffer.append("Method ").append(message).append(": ");
130 if (stat) buffer.append("static ");
131 buffer.append(Type.getReturnType(desc).getClassName());
132 buffer.append(' ').append(getClassInfo(owner)).append('.').append(name);
133 }
134 buffer.append('(');
135 boolean first = true;
136 for (Type type : Type.getArgumentTypes(desc)) {
137 buffer.append(first ? "" : ",").append(type.getClassName());
138 first = false;
139 }
140 return buffer.append(')').toString();
141 }
142 }
143 |
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