byte[] nullAdaptClass(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();
Method[] ms = cg.getMethods();
for (int j = 0; j < ms.length; ++j) {
MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
boolean lv = ms[j].getLocalVariableTable() == null;
boolean ln = ms[j].getLineNumberTable() == null;
if (lv) {
mg.removeLocalVariables();
}
if (ln) {
mg.removeLineNumbers();
}
mg.stripAttributes(skipDebug);
InstructionList il = mg.getInstructionList();
if (il != null) {
InstructionHandle ih = il.getStart();
while (ih != null) {
ih = ih.getNext();
}
if (compute) {
mg.setMaxStack();
mg.setMaxLocals();
}
}
cg.replaceMethod(ms[j], mg.getMethod());
}
return cg.getJavaClass().getBytes();
}
/**
* Empties the method of all code (except for a return). This includes line numbers, exceptions,
* local variables, etc.
*/
public static void empty_method(MethodGen mg) {
mg.setInstructionList(new InstructionList(new RETURN()));
mg.removeExceptionHandlers();
mg.removeLineNumbers();
mg.removeLocalVariables();
mg.setMaxLocals();
}
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();
}
/**
* Sets the locals to 'this' and each of the arguments. Any other locals are removed. An
* instruction list with at least one instruction must exist.
*/
public static void setup_init_locals(MethodGen mg) {
// Get the parameter types and names.
Type[] arg_types = mg.getArgumentTypes();
String[] arg_names = mg.getArgumentNames();
// Remove any existing locals
mg.setMaxLocals(0);
mg.removeLocalVariables();
// Add a local for the instance variable (this)
if (!mg.isStatic()) mg.addLocalVariable("this", new ObjectType(mg.getClassName()), null, null);
// Add a local for each parameter
for (int ii = 0; ii < arg_names.length; ii++) {
mg.addLocalVariable(arg_names[ii], arg_types[ii], null, null);
}
// Reset the current number of locals so that when other locals
// are added they get added at the correct offset
mg.setMaxLocals();
return;
}
static void nullBCELAdapt(final byte[] b) throws IOException {
JavaClass jc = new ClassParser(new ByteArrayInputStream(b), "class-name").parse();
ClassGen cg = new ClassGen(jc);
ConstantPoolGen cp = cg.getConstantPool();
Method[] ms = cg.getMethods();
for (int k = 0; k < ms.length; ++k) {
MethodGen mg = new MethodGen(ms[k], cg.getClassName(), cp);
boolean lv = ms[k].getLocalVariableTable() == null;
boolean ln = ms[k].getLineNumberTable() == null;
if (lv) {
mg.removeLocalVariables();
}
if (ln) {
mg.removeLineNumbers();
}
mg.stripAttributes(skipDebug);
InstructionList il = mg.getInstructionList();
if (il != null) {
InstructionHandle ih = il.getStart();
while (ih != null) {
ih = ih.getNext();
}
if (compute) {
mg.setMaxStack();
mg.setMaxLocals();
}
if (computeFrames) {
ModifiedPass3bVerifier verif;
verif = new ModifiedPass3bVerifier(jc, k);
verif.do_verify();
}
}
cg.replaceMethod(ms[k], mg.getMethod());
}
cg.getJavaClass().getBytes();
}