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1 import jode.bytecode.*;
2 import java.util.*;
3 import com.sun.java.util.collections.Iterator;
4
5 public class CountOpcodes {
6 static int[] opcodeCount = new int[256];
7 static int[] predsCount = new int[1024];
8 static int[] succsCount = new int[1024];
9 static Vector instructions = new Vector(73400);
10
11 public static void handleBytecode(BytecodeInfo bc) {
12 for (Iterator i = bc.getInstructions().iterator(); i.hasNext();) {
13 Instruction instr = (Instruction) i.next();
14 instructions.addElement(instr);
15 opcodeCount[instr.getOpcode()]++;
16 Instruction[] p = instr.getPreds();
17 if (p == null)
18 predsCount[0]++;
19 else
20 predsCount[p.length]++;
21
22 Instruction[] s = instr.getSuccs();
23 if (s == null)
24 succsCount[0]++;
25 else
26 succsCount[s.length]++;
27 }
28 }
29
30 public static void handlePackage(String  pack) {
31 Enumeration subs = ClassInfo.getClassesAndPackages(pack);
32 while (subs.hasMoreElements()) {
33 String comp = (String ) subs.nextElement();
34 String full = pack + "." + comp;
35 if (ClassInfo.isPackage(full))
36 handlePackage(full);
37 else {
38 ClassInfo clazz = ClassInfo.forName(full);
39 clazz.loadInfo(ClassInfo.FULLINFO);
40 MethodInfo[] ms = clazz.getMethods();
41 for (int i=0; i < ms.length; i++) {
42 BytecodeInfo bc = ms[i].getBytecode();
43 if (bc != null)
44 handleBytecode(bc);
45 }
46 }
47 }
48 }
49
50 public static void main(String [] params) {
51 ClassInfo.setClassPath(params[0]);
52 Runtime runtime = Runtime.getRuntime();
53 long free = runtime.freeMemory();
54 long last;
55 do {
56 last = free;
57 runtime.gc();
58 runtime.runFinalization();
59 free = runtime.freeMemory();
60 } while (free < last);
61 System.err.println("used before: "+(runtime.totalMemory()- free));
62 long time = System.currentTimeMillis();
63 handlePackage("com");
64 System.err.println("Time used: "+(System.currentTimeMillis() - time));
65 free = runtime.freeMemory();
66 do {
67 last = free;
68 runtime.gc();
69 runtime.runFinalization();
70 free = runtime.freeMemory();
71 } while (free < last);
72 System.err.println("used after: "+(runtime.totalMemory()- free));
73 System.err.println("instruction count: "+instructions.size());
74 for (int i=0; i< 256; i++) {
75 if (opcodeCount[i] > 0)
76 System.err.println("Opcode "+i+": \t ("+Opcodes.opcodeString[i]+")\t"+opcodeCount[i]);
77 }
78 int moreThanTwo = 0;
79 for (int i=0; i< predsCount.length; i++) {
80 if (predsCount[i] > 0) {
81 System.err.println("preds "+i+": \t"+predsCount[i]);
82 if (i>1)
83 moreThanTwo +=predsCount[i];
84 }
85 }
86 System.err.println("preds >2: \t"+moreThanTwo);
87
88 moreThanTwo = 0;
89 for (int i=0; i< succsCount.length; i++) {
90 if (succsCount[i] > 0) {
91 System.err.println("succs "+i+": \t"+succsCount[i]);
92 if (i>1)
93 moreThanTwo +=succsCount[i];
94 }
95 }
96 System.err.println("succs >2: \t"+moreThanTwo);
97 }
98 }
99
100 |
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