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1
30 package org.objectweb.asm;
31
32 import org.apache.bcel.Constants;
33 import org.apache.bcel.classfile.ClassParser;
34 import org.apache.bcel.classfile.JavaClass;
35 import org.apache.bcel.classfile.Method;
36 import org.apache.bcel.generic.ALOAD;
37 import org.apache.bcel.generic.ClassGen;
38 import org.apache.bcel.generic.ConstantPoolGen;
39 import org.apache.bcel.generic.FieldGen;
40 import org.apache.bcel.generic.GETFIELD;
41 import org.apache.bcel.generic.IADD;
42 import org.apache.bcel.generic.ICONST;
43 import org.apache.bcel.generic.InstructionHandle;
44 import org.apache.bcel.generic.InstructionList;
45 import org.apache.bcel.generic.MethodGen;
46 import org.apache.bcel.generic.PUTFIELD;
47 import org.apache.bcel.generic.Type;
48
49 import java.io.InputStream  ;
50
51
54 public class BCELPerfTest extends ALLPerfTest implements Constants {
55
56 public static void main(final String args[]) throws Exception {
57 System.out.println("BCEL PERFORMANCES\n");
58 new BCELPerfTest().perfs(args);
59 }
60
61 ALLPerfTest newInstance() {
62 return new BCELPerfTest();
63 }
64
65 byte[] nullAdaptClass(final InputStream is, final String name)
66 throws Exception
67 {
68 JavaClass jc = new ClassParser(is, name + ".class").parse();
69 ClassGen cg = new ClassGen(jc);
70 ConstantPoolGen cp = cg.getConstantPool();
71 Method[] ms = cg.getMethods();
72 for (int j = 0; j < ms.length; ++j) {
73 MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
74 boolean lv = ms[j].getLocalVariableTable() == null;
75 boolean ln = ms[j].getLineNumberTable() == null;
76 if (lv) {
77 mg.removeLocalVariables();
78 }
79 if (ln) {
80 mg.removeLineNumbers();
81 }
82 mg.stripAttributes(skipDebug);
83 InstructionList il = mg.getInstructionList();
84 if (il != null) {
85 InstructionHandle ih = il.getStart();
86 while (ih != null) {
87 ih = ih.getNext();
88 }
89 if (compute) {
90 mg.setMaxStack();
91 mg.setMaxLocals();
92 }
93 }
94 cg.replaceMethod(ms[j], mg.getMethod());
95 }
96 return cg.getJavaClass().getBytes();
97 }
98
99 byte[] counterAdaptClass(final InputStream is, final String name)
100 throws Exception
101 {
102 JavaClass jc = new ClassParser(is, name + ".class").parse();
103 ClassGen cg = new ClassGen(jc);
104 ConstantPoolGen cp = cg.getConstantPool();
105 if (!cg.isInterface()) {
106 FieldGen fg = new FieldGen(ACC_PUBLIC,
107 Type.getType("I"),
108 "_counter",
109 cp);
110 cg.addField(fg.getField());
111 }
112 Method[] ms = cg.getMethods();
113 for (int j = 0; j < ms.length; ++j) {
114 MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
115 if (!mg.getName().equals("<init>") && !mg.isStatic()
116 && !mg.isAbstract() && !mg.isNative())
117 {
118 if (mg.getInstructionList() != null) {
119 InstructionList il = new InstructionList();
120 il.append(new ALOAD(0));
121 il.append(new ALOAD(0));
122 il.append(new GETFIELD(cp.addFieldref(name, "_counter", "I")));
123 il.append(new ICONST(1));
124 il.append(new IADD());
125 il.append(new PUTFIELD(cp.addFieldref(name, "_counter", "I")));
126 mg.getInstructionList().insert(il);
127 mg.setMaxStack(Math.max(mg.getMaxStack(), 2));
128 boolean lv = ms[j].getLocalVariableTable() == null;
129 boolean ln = ms[j].getLineNumberTable() == null;
130 if (lv) {
131 mg.removeLocalVariables();
132 }
133 if (ln) {
134 mg.removeLineNumbers();
135 }
136 cg.replaceMethod(ms[j], mg.getMethod());
137 }
138 }
139 }
140 return cg.getJavaClass().getBytes();
141 }
142 }
143 |
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