private Object sawInvokeSpecial(Object userObject) {
Object returnValue = userObject;
String methodName = getNameConstantOperand();
if (Values.CONSTRUCTOR.equals(methodName)) {
String clsName = getClassConstantOperand().replace('/', '.');
if (doesObjectNeedToBeWatched(clsName)) {
returnValue = Boolean.TRUE;
}
}
processMethodParms();
return returnValue;
}
/**
* looks for methods that have it's parameters all follow the form arg0, arg1, arg2, or parm0,
* parm1, parm2 etc, where the method actually has code in it
*
* @param cls the class to check
*/
private void checkIDEGeneratedParmNames(JavaClass cls) {
methods:
for (Method m : cls.getMethods()) {
if (!m.isPublic()) {
continue;
}
String name = m.getName();
if (Values.CONSTRUCTOR.equals(name) || Values.STATIC_INITIALIZER.equals(name)) {
continue;
}
LocalVariableTable lvt = m.getLocalVariableTable();
if (lvt == null) {
continue;
}
if (m.getCode().getCode().length <= MAX_EMPTY_METHOD_SIZE) {
continue;
}
int numArgs = m.getArgumentTypes().length;
if (numArgs == 0) {
continue;
}
int offset = m.isStatic() ? 0 : 1;
for (int i = 0; i < numArgs; i++) {
LocalVariable lv = lvt.getLocalVariable(offset + i, 0);
if ((lv == null) || (lv.getName() == null)) {
continue methods;
}
Matcher ma = ARG_PATTERN.matcher(lv.getName());
if (!ma.matches()) {
continue methods;
}
}
bugReporter.reportBug(
new BugInstance(
this,
BugType.IMC_IMMATURE_CLASS_IDE_GENERATED_PARAMETER_NAMES.name(),
NORMAL_PRIORITY)
.addClass(cls)
.addMethod(cls, m));
return;
}
}
@Override
public void sawOpcode(int seen) {
try {
stack.precomputation(this);
int pc = getPC();
if ((loopEnd != -1) && (pc > loopEnd)) {
loopStart = -1;
loopEnd = -1;
regValueType.clear();
}
if ((seen == ALOAD) || ((seen >= ALOAD_0) && (seen <= ALOAD_3))) {
int reg = RegisterUtils.getALoadReg(this, seen);
State type = regValueType.get(Integer.valueOf(reg));
if (type != null) state = type;
else state = State.SEEN_NOTHING;
return;
}
if ((seen == ASTORE) || ((seen >= ASTORE_0) && (seen <= ASTORE_3))) {
if (stack.getStackDepth() > 0) {
OpcodeStack.Item item = stack.getStackItem(0);
int reg = RegisterUtils.getAStoreReg(this, seen);
regValueType.put(Integer.valueOf(reg), (State) item.getUserValue());
}
state = State.SEEN_NOTHING;
return;
}
if ((seen == ILOAD) || ((seen >= ILOAD_0) && (seen <= ILOAD_3))) {
int reg = RegisterUtils.getLoadReg(this, seen);
State type = regValueType.get(Integer.valueOf(reg));
if (type != null) state = type;
else state = State.SEEN_NOTHING;
return;
}
if ((seen == ISTORE) || ((seen >= ISTORE_0) && (seen <= ISTORE_3))) {
if (stack.getStackDepth() > 0) {
OpcodeStack.Item item = stack.getStackItem(0);
int reg = RegisterUtils.getStoreReg(this, seen);
regValueType.put(Integer.valueOf(reg), (State) item.getUserValue());
}
state = State.SEEN_NOTHING;
return;
}
switch (state) {
case SEEN_NOTHING:
if (seen == INVOKESPECIAL) {
if (("java/util/StringTokenizer".equals(getClassConstantOperand()))
&& (Values.CONSTRUCTOR.equals(getNameConstantOperand()))
&& ("(Ljava/lang/String;Ljava/lang/String;)V".equals(getSigConstantOperand())))
state = State.SEEN_STRINGTOKENIZER;
}
break;
case SEEN_STRINGTOKENIZER:
if (seen == INVOKEVIRTUAL) {
String methodName = getNameConstantOperand();
String signature = getSigConstantOperand();
if (("countTokens".equals(methodName)) && ("()I".equals(signature)))
state = State.SEEN_COUNTTOKENS;
else if ("hasMoreTokens".equals(methodName) || "hasMoreElements".equals(methodName))
state = State.SEEN_HASMORE;
else if ("nextToken".equals(methodName) || "nextElement".equals(methodName)) {
if ((pc < loopStart) || (pc > loopEnd)) regValueType.clear();
else state = State.SEEN_NEXT;
}
}
break;
case SEEN_COUNTTOKENS:
if (seen == ANEWARRAY) state = State.SEEN_NEWARRAY;
else if (seen == IF_ICMPGE) {
int target = getBranchTarget() - 3; // sizeof goto
byte[] code = getCode().getCode();
if ((code[target] & 0x000000FF) == GOTO) {
int offset = (code[target + 1] << 1) + code[target + 2];
int gotoTarget = target + offset + 3;
if (gotoTarget < getPC()) {
loopStart = gotoTarget;
loopEnd = target;
}
}
}
break;
case SEEN_HASMORE:
if (seen == IFEQ) {
int target = getBranchTarget() - 3; // sizeof goto
byte[] code = getCode().getCode();
if ((code[target] & 0x000000FF) == GOTO) {
int offset = (code[target + 1] << 1) + code[target + 2];
int gotoTarget = target + offset + 3;
if (gotoTarget < getPC()) {
loopStart = gotoTarget;
loopEnd = target;
}
}
}
state = State.SEEN_NOTHING;
break;
case SEEN_NEXT:
if (seen == AASTORE) {
if ((pc > loopStart) && (pc < loopEnd)) {
if (stack.getStackDepth() > 2) {
OpcodeStack.Item arrayItem = stack.getStackItem(2);
State arrayType = (State) arrayItem.getUserValue();
OpcodeStack.Item elemItem = stack.getStackItem(0);
State elemType = (State) elemItem.getUserValue();
if ((arrayType == State.SEEN_NEWARRAY) && (elemType == State.SEEN_NEXT)) {
bugReporter.reportBug(
new BugInstance(this, BugType.USS_USE_STRING_SPLIT.name(), NORMAL_PRIORITY)
.addClass(this)
.addMethod(this)
.addSourceLine(this));
}
}
}
}
state = State.SEEN_NOTHING;
break;
case SEEN_ARRAYSTORE:
case SEEN_NEWARRAY:
break;
}
} finally {
TernaryPatcher.pre(stack, seen);
stack.sawOpcode(this, seen);
TernaryPatcher.post(stack, seen);
if (state != State.SEEN_NOTHING) {
if (stack.getStackDepth() > 0) {
OpcodeStack.Item item = stack.getStackItem(0);
item.setUserValue(state);
}
}
}
}