/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINVOKESPECIAL(INVOKESPECIAL o) {
if (o.getMethodName(cpg).equals(Constants.CONSTRUCTOR_NAME)) {
UninitializedObjectType t =
(UninitializedObjectType) stack().peek(o.getArgumentTypes(cpg).length);
if (t == Frame._this) {
Frame._this = null;
}
stack().initializeObject(t);
locals().initializeObject(t);
}
stack().pop(); // objectref
for (int i = 0; i < o.getArgumentTypes(cpg).length; i++) {
stack().pop();
}
// We are sure the invoked method will xRETURN eventually
// We simulate xRETURNs functionality here because we
// don't really "jump into" and simulate the invoked
// method.
if (o.getReturnType(cpg) != Type.VOID) {
Type t = o.getReturnType(cpg);
if (t.equals(Type.BOOLEAN)
|| t.equals(Type.CHAR)
|| t.equals(Type.BYTE)
|| t.equals(Type.SHORT)) {
t = Type.INT;
}
stack().push(t);
}
}
public static String getCallClassName(Instruction ins, ConstantPoolGen cp) {
if (ins instanceof INVOKESTATIC) {
INVOKESTATIC invst = (INVOKESTATIC) ins;
return invst.getClassName(cp);
} else if (ins instanceof INVOKEVIRTUAL) {
INVOKEVIRTUAL invst = (INVOKEVIRTUAL) ins;
return invst.getClassName(cp);
} else if (ins instanceof INVOKEINTERFACE) {
INVOKEINTERFACE invst = (INVOKEINTERFACE) ins;
return invst.getClassName(cp);
} else if (ins instanceof INVOKESPECIAL) {
INVOKESPECIAL invst = (INVOKESPECIAL) ins;
return invst.getClassName(cp);
} else {
return null;
}
}
public static Type[] getCallArgTypes(Instruction ins, ConstantPoolGen cp) {
if (ins instanceof INVOKESTATIC) {
INVOKESTATIC invst = (INVOKESTATIC) ins;
return invst.getArgumentTypes(cp);
} else if (ins instanceof INVOKEVIRTUAL) {
INVOKEVIRTUAL invst = (INVOKEVIRTUAL) ins;
return invst.getArgumentTypes(cp);
} else if (ins instanceof INVOKEINTERFACE) {
INVOKEINTERFACE invst = (INVOKEINTERFACE) ins;
return invst.getArgumentTypes(cp);
} else if (ins instanceof INVOKESPECIAL) {
INVOKESPECIAL invst = (INVOKESPECIAL) ins;
return invst.getArgumentTypes(cp);
} else {
return null;
}
}
public static Instruction getNewInvoke(Instruction ins, int index) {
if (ins instanceof INVOKESTATIC) {
INVOKESTATIC invst = (INVOKESTATIC) ins;
invst.setIndex(index);
return invst;
} else if (ins instanceof INVOKEVIRTUAL) {
INVOKEVIRTUAL invst = (INVOKEVIRTUAL) ins;
invst.setIndex(index);
return invst;
} else if (ins instanceof INVOKEINTERFACE) {
INVOKEINTERFACE invst = (INVOKEINTERFACE) ins;
invst.setIndex(index);
return invst;
} else if (ins instanceof INVOKESPECIAL) {
INVOKESPECIAL invst = (INVOKESPECIAL) ins;
invst.setIndex(index);
return invst;
} else {
return null;
}
}
