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BinaryEventHandler.java
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BinaryEventHandler.java
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/* *****************************************************************************
* Copyright 2018 Dynamic Analysis Group, Università della Svizzera Italiana (USI)
* Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* *****************************************************************************/
package ch.usi.inf.nodeprof.handlers;
import com.oracle.truffle.api.instrumentation.EventContext;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.js.runtime.Strings;
import com.oracle.truffle.js.runtime.objects.Undefined;
import ch.usi.inf.nodeprof.ProfiledTagEnum;
/**
* Abstract event handler for binary events
*/
public abstract class BinaryEventHandler extends BaseSingleTagEventHandler {
private final TruffleString op;
private final boolean isLogic;
public BinaryEventHandler(EventContext context) {
super(context, ProfiledTagEnum.BINARY);
String internalOp = "";
Object o = getAttributeOrNull("operator");
if (o != null) {
assert o instanceof String;
internalOp = (String) o;
}
isLogic = internalOp.equals("||") || internalOp.equals("&&");
op = Strings.fromJavaString(internalOp);
}
/**
* @return the operator
*/
public Object getOp() {
return this.op;
}
/**
* @return the left operand from inputs[0]
*/
public Object getLeft(Object[] inputs) {
return assertGetInput(0, inputs, "left");
}
/**
* @return the right operand from inputs[1]
*/
public Object getRight(Object[] inputs) {
/**
* TODO
*
* remove the check after bug fix
*/
if (inputs.length < 2) {
return Undefined.instance;
}
return assertGetInput(1, inputs, "right");
}
/**
* the logic operator '||' and '&&' are two special binary operations.
*
* e.g., true || right, false && right would only evaluate the left operand
*
* @return true if the operator is '||' or '&&'
*/
public boolean isLogic() {
return this.isLogic;
}
/**
* @return 0 for logical operations and 2 for others
*/
@Override
public int expectedNumInputs() {
if (isLogic()) {
return 0;
}
return 2;
}
}