Java Code Examples for org.objectweb.asm.Opcodes#NULL

The following examples show how to use org.objectweb.asm.Opcodes#NULL . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: CheckMethodAdapter.java    From Concurnas with MIT License 7 votes vote down vote up 
/**
 * Checks a stack frame value.
 *
 * @param value the value to be checked.
 */
private void checkFrameValue(final Object value) {
  if (value == Opcodes.TOP
      || value == Opcodes.INTEGER
      || value == Opcodes.FLOAT
      || value == Opcodes.LONG
      || value == Opcodes.DOUBLE
      || value == Opcodes.NULL
      || value == Opcodes.UNINITIALIZED_THIS) {
    return;
  } else if (value instanceof String) {
    checkInternalName(version, (String) value, "Invalid stack frame value");
  } else if (value instanceof Label) {
    referencedLabels.add((Label) value);
  } else {
    throw new IllegalArgumentException("Invalid stack frame value: " + value);
  }
}
Example 2
Source File: CheckMethodAdapter.java    From JByteMod-Beta with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * Checks a stack frame value.
 * 
 * @param value
 *          the value to be checked.
 */
void checkFrameValue(final Object value) {
  if (value == Opcodes.TOP || value == Opcodes.INTEGER || value == Opcodes.FLOAT || value == Opcodes.LONG || value == Opcodes.DOUBLE
      || value == Opcodes.NULL || value == Opcodes.UNINITIALIZED_THIS) {
    return;
  }
  if (value instanceof String) {
    checkInternalName((String) value, "Invalid stack frame value");
    return;
  }
  if (!(value instanceof Label)) {
    throw new IllegalArgumentException("Invalid stack frame value: " + value);
  } else {
    usedLabels.add((Label) value);
  }
}
Example 3
Source File: CheckMethodAdapter.java    From JReFrameworker with MIT License 6 votes vote down vote up 
/**
 * Checks a stack frame value.
 *
 * @param value the value to be checked.
 */
private void checkFrameValue(final Object value) {
  if (value == Opcodes.TOP
      || value == Opcodes.INTEGER
      || value == Opcodes.FLOAT
      || value == Opcodes.LONG
      || value == Opcodes.DOUBLE
      || value == Opcodes.NULL
      || value == Opcodes.UNINITIALIZED_THIS) {
    return;
  } else if (value instanceof String) {
    checkInternalName(version, (String) value, "Invalid stack frame value");
  } else if (value instanceof Label) {
    referencedLabels.add((Label) value);
  } else {
    throw new IllegalArgumentException("Invalid stack frame value: " + value);
  }
}
Example 4
Source File: CheckMethodAdapter.java    From JReFrameworker with MIT License 6 votes vote down vote up 
/**
 * Checks a stack frame value.
 *
 * @param value the value to be checked.
 */
private void checkFrameValue(final Object value) {
  if (value == Opcodes.TOP
      || value == Opcodes.INTEGER
      || value == Opcodes.FLOAT
      || value == Opcodes.LONG
      || value == Opcodes.DOUBLE
      || value == Opcodes.NULL
      || value == Opcodes.UNINITIALIZED_THIS) {
    return;
  } else if (value instanceof String) {
    checkInternalName(version, (String) value, "Invalid stack frame value");
  } else if (value instanceof Label) {
    referencedLabels.add((Label) value);
  } else {
    throw new IllegalArgumentException("Invalid stack frame value: " + value);
  }
}
Example 5
Source File: RegisterSpecAnalyzer.java    From buck with Apache License 2.0 6 votes vote down vote up 
@Override
public void visitJumpInsn(int opcode, Label label) {
  // There are only two opcodes for comparing object references.
  if (opcode != Opcodes.IF_ACMPEQ && opcode != Opcodes.IF_ACMPNE) {
    return;
  }
  // There should be two arguments on the stack.
  Preconditions.checkState(adapter.stack.size() >= 2);
  Object val1 = adapter.stack.get(adapter.stack.size() - 2);
  Object val2 = adapter.stack.get(adapter.stack.size() - 1);
  // If either is known null, then the comparison is benign.
  if (val1 == Opcodes.NULL || val2 == Opcodes.NULL) {
    return;
  }
  // If not, they both should be strings (class names).
  Preconditions.checkState(val1 instanceof String);
  Preconditions.checkState(val2 instanceof String);
  // If both are risky, report.
  if (RISKY_TYPES.contains(val1) && RISKY_TYPES.contains(val2)) {
    log.add(
        String.format((Locale) null, "RegisterSpec comparison: %s.%s", className, methodName));
  }
}
Example 6
Source File: StackInfo.java    From copper-engine with Apache License 2.0 6 votes vote down vote up 
static Type deferLocalDesc(Object object) {
    if (object instanceof String)
        return Type.getObjectType((String) object);
    // TODO: analyze opcode at pos label
    if (object instanceof Label)
        return Type.getType(Object.class);
    int intObject = (Integer) object;
    if (intObject == Opcodes.TOP)
        return null;
    if (intObject == Opcodes.INTEGER)
        return Type.INT_TYPE;
    if (intObject == Opcodes.FLOAT)
        return Type.FLOAT_TYPE;
    if (intObject == Opcodes.LONG)
        return Type.LONG_TYPE;
    if (intObject == Opcodes.DOUBLE)
        return Type.getType(double.class);
    if (intObject == Opcodes.LONG)
        return Type.getType(long.class);
    if (intObject == Opcodes.NULL)
        return Type.getType(Object.class);
    // TODO: defer from containing class
    if (intObject == Opcodes.UNINITIALIZED_THIS)
        return Type.getType(Object.class);
    throw new BuildStackFrameException("Couldnt defer desc for " + object);
}
Example 7
Source File: ASMClassParser.java    From TickDynamic with MIT License 5 votes vote down vote up 
protected Object parseFrameType(Map<String, Label> labels, String typeStr) throws Exception {
	if(typeStr.length() == 1) //Base type
	{
		if(typeStr.equals("T"))
			return Opcodes.TOP;
		else if(typeStr.equals("I"))
			return Opcodes.INTEGER;
		else if(typeStr.equals("F"))
			return Opcodes.FLOAT;
		else if(typeStr.equals("D"))
			return Opcodes.DOUBLE;
		else if(typeStr.equals("J"))
			return Opcodes.LONG;
		else if(typeStr.equals("N"))
			return Opcodes.NULL;
		else if(typeStr.equals("U"))
			return Opcodes.UNINITIALIZED_THIS;
		else
			throw new Exception(getCurrentTokenLine() + ": Error while parsing frame type, found no type for " + typeStr);
	}
	
	//Label
	if(typeStr.startsWith("L") && StringUtils.isNumeric(typeStr.substring(1)))
		return getLabel(labels, typeStr);
	
	//Class name
	return typeStr;
}
Example 8
Source File: BytecodeTypeInference.java    From bazel with Apache License 2.0 5 votes vote down vote up 
/** Convert the type in stack map frame to inference type. */
private InferredType convertTypeInStackMapFrame(Object typeInStackMapFrame) {
  if (typeInStackMapFrame == Opcodes.TOP) {
    return InferredType.TOP;
  } else if (typeInStackMapFrame == Opcodes.INTEGER) {
    return InferredType.INT;
  } else if (typeInStackMapFrame == Opcodes.FLOAT) {
    return InferredType.FLOAT;
  } else if (typeInStackMapFrame == Opcodes.DOUBLE) {
    return InferredType.DOUBLE;
  } else if (typeInStackMapFrame == Opcodes.LONG) {
    return InferredType.LONG;
  } else if (typeInStackMapFrame == Opcodes.NULL) {
    return InferredType.NULL;
  } else if (typeInStackMapFrame == Opcodes.UNINITIALIZED_THIS) {
    return InferredType.UNINITIALIZED_THIS;
  } else if (typeInStackMapFrame instanceof String) {
    String referenceTypeName = (String) typeInStackMapFrame;
    if (referenceTypeName.charAt(0) == '[') {
      return InferredType.create(referenceTypeName);
    } else {
      return InferredType.create('L' + referenceTypeName + ';');
    }
  } else if (typeInStackMapFrame instanceof Label) {
    return InferredType.UNINITIALIZED;
  } else {
    throw new RuntimeException(
        "Cannot reach here. Unhandled element: value="
            + typeInStackMapFrame
            + ", class="
            + typeInStackMapFrame.getClass()
            + ". The current method being desugared is "
            + methodSignature);
  }
}