public void translate(ClassGenerator classGen, MethodGenerator methodGen) { final InstructionList il = methodGen.getInstructionList(); _left.translate(classGen, methodGen); _right.translate(classGen, methodGen); switch (_op) { case PLUS: il.append(_type.ADD()); break; case MINUS: il.append(_type.SUB()); break; case TIMES: il.append(_type.MUL()); break; case DIV: il.append(_type.DIV()); break; case MOD: il.append(_type.REM()); break; default: ErrorMsg msg = new ErrorMsg(ErrorMsg.ILLEGAL_BINARY_OP_ERR, this); getParser().reportError(Constants.ERROR, msg); } }
/** * Convenience method. * * <p>Add an empty constructor to this class that does nothing but calling super(). * * @param access rights for constructor */ public void addEmptyConstructor(int access_flags) { InstructionList il = new InstructionList(); il.append(InstructionConstants.THIS); // Push `this' il.append(new INVOKESPECIAL(cp.addMethodref(super_class_name, "<init>", "()V"))); il.append(InstructionConstants.RETURN); MethodGen mg = new MethodGen(access_flags, Type.VOID, Type.NO_ARGS, null, "<init>", class_name, il, cp); mg.setMaxStack(1); addMethod(mg.getMethod()); }
private void createCode(Element code) throws IllegalXMLVMException { List<Element> instructions = code.getChildren(); for (Element inst : instructions) { String name = inst.getName(); String opcMethodName = "createInstruction" + name.substring(0, 1).toUpperCase() + name.substring(1); Class appClazz; Method opcMeth; Class[] paramTypes = {Element.class}; Object[] params = {inst}; appClazz = this.getClass(); Object newInstr = null; try { opcMeth = appClazz.getMethod(opcMethodName, paramTypes); newInstr = opcMeth.invoke(this, params); } catch (NoSuchMethodException ex) { throw new IllegalXMLVMException( "Illegal instruction 1, unable to find method " + opcMethodName + " for '" + name + "'"); } catch (InvocationTargetException ex) { ex.printStackTrace(); throw new IllegalXMLVMException("Illegal instruction 2 '" + name + "'"); } catch (IllegalAccessException ex) { throw new IllegalXMLVMException("Illegal instruction 3 '" + name + "'"); } if (newInstr != null) { InstructionHandle ih = null; if (newInstr instanceof BranchInstruction) ih = il.append((BranchInstruction) newInstr); else if (newInstr instanceof CompoundInstruction) ih = il.append((CompoundInstruction) newInstr); else if (newInstr instanceof Instruction) ih = il.append((Instruction) newInstr); instructionHandlerManager.registerInstructionHandle(ih); } } }
byte[] counterAdaptClass(final InputStream is, final String name) throws Exception { JavaClass jc = new ClassParser(is, name + ".class").parse(); ClassGen cg = new ClassGen(jc); String cName = cg.getClassName(); ConstantPoolGen cp = cg.getConstantPool(); if (!cg.isInterface()) { FieldGen fg = new FieldGen(ACC_PUBLIC, Type.getType("I"), "_counter", cp); cg.addField(fg.getField()); } Method[] ms = cg.getMethods(); for (int j = 0; j < ms.length; ++j) { MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp); if (!mg.getName().equals("<init>") && !mg.isStatic() && !mg.isAbstract() && !mg.isNative()) { if (mg.getInstructionList() != null) { InstructionList il = new InstructionList(); il.append(new ALOAD(0)); il.append(new ALOAD(0)); il.append(new GETFIELD(cp.addFieldref(name, "_counter", "I"))); il.append(new ICONST(1)); il.append(new IADD()); il.append(new PUTFIELD(cp.addFieldref(name, "_counter", "I"))); mg.getInstructionList().insert(il); mg.setMaxStack(Math.max(mg.getMaxStack(), 2)); boolean lv = ms[j].getLocalVariableTable() == null; boolean ln = ms[j].getLineNumberTable() == null; if (lv) { mg.removeLocalVariables(); } if (ln) { mg.removeLineNumbers(); } cg.replaceMethod(ms[j], mg.getMethod()); } } } return cg.getJavaClass().getBytes(); }
/** * Transforms invoke instructions that match the specified list for this class to call the * specified static call instead. */ private InstructionList xform_inst(MethodGen mg, Instruction inst) { switch (inst.getOpcode()) { case Constants.INVOKESTATIC: { InstructionList il = new InstructionList(); INVOKESTATIC is = (INVOKESTATIC) inst; String cname = is.getClassName(pgen); String mname = is.getMethodName(pgen); Type[] args = is.getArgumentTypes(pgen); MethodDef orig = new MethodDef(cname + "." + mname, args); MethodInfo call = method_map.get(orig); if (call != null) { call.cnt++; String classname = call.method_class; String methodname = mname; debug_map.log( "%s.%s: Replacing method %s.%s (%s) with %s.%s%n", mg.getClassName(), mg.getName(), cname, mname, UtilMDE.join(args, ", "), classname, methodname); il.append( ifact.createInvoke( classname, methodname, is.getReturnType(pgen), args, Constants.INVOKESTATIC)); } return (il); } case Constants.INVOKEVIRTUAL: { InstructionList il = new InstructionList(); INVOKEVIRTUAL iv = (INVOKEVIRTUAL) inst; String cname = iv.getClassName(pgen); String mname = iv.getMethodName(pgen); Type[] args = iv.getArgumentTypes(pgen); Type instance_type = iv.getReferenceType(pgen); Type[] new_args = BCELUtil.insert_type(instance_type, args); MethodDef orig = new MethodDef(cname + "." + mname, args); if (debug_class) System.out.printf("looking for %s in map %s%n", orig, method_map); MethodInfo call = method_map.get(orig); if (call != null) { call.cnt++; String classname = call.method_class; String methodname = mname; debug_map.log( "Replacing method %s.%s (%s) with %s.%s%n", cname, mname, ArraysMDE.toString(args), classname, methodname); il.append( ifact.createInvoke( classname, methodname, iv.getReturnType(pgen), new_args, Constants.INVOKESTATIC)); } return (il); } default: return (null); } }