CFG createCFG(String className) throws ClassNotFoundException {
CFG cfg = new CFG();
JavaClass jc = Repository.lookupClass(className);
ClassGen cg = new ClassGen(jc);
ConstantPoolGen cpg = cg.getConstantPool();
for (Method m : cg.getMethods()) {
MethodGen mg = new MethodGen(m, cg.getClassName(), cpg);
InstructionList il = mg.getInstructionList();
InstructionHandle[] handles = il.getInstructionHandles();
int prev = 0;
for (InstructionHandle ih : handles) {
int position = ih.getPosition();
cfg.addNode(position, m, jc);
Instruction inst = ih.getInstruction();
boolean br = inst.getName().contains("if") || inst.getName().contains("goto");
boolean ret = inst.getName().contains("return");
boolean stat = inst.getName().contains("invokestatic");
int len = inst.getLength();
if (stat) {
int index = inst.toString(true).indexOf(" ");
String name = inst.toString(true).substring(index + 1);
int tar = Integer.valueOf(name);
INVOKESTATIC inv = new INVOKESTATIC(tar);
name = inv.getMethodName(cpg);
Method m2 = null;
Method[] tm = cg.getMethods();
for (int i = 0; i < tm.length; i++) {
if (tm[i].getName().equals(name)) {
m2 = tm[i];
}
}
cfg.addEdge(position, m, jc, 0, m2, jc);
cfg.addEdge(-1, m2, jc, position + len, m, jc);
}
if (!ret && !stat) {
cfg.addEdge(position, position + len, m, jc);
}
if (br) {
cfg.addEdge(position, position + len, m, jc);
IF_ICMPGE comp = new IF_ICMPGE(ih);
String name = comp.getTarget().toString(false);
int index = name.indexOf(">");
name = name.substring(index + 2);
int tar = Integer.valueOf(name);
cfg.addEdge(position, tar, m, jc);
}
if (ret) {
cfg.addEdge(position, -1, m, jc);
}
prev = position;
}
System.out.println(cfg.toString());
}
return cfg;
}
/** Get the number of bytes for which this local has a value in the code byte array. */
public int getLength() {
if (_end != null) return _end.getByteIndex() + _end.getLength() - _target.getByteIndex();
return _length;
}