org.adoptopenjdk.jitwatch.jarscan.invokecount.InvokeCountOperation Maven / Gradle / Ivy

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A Maven plugin that scans the project artifact and its dependencies for methods that cannot be inlined by the JIT compiler. It uses the JarScan utility from the JITWatch project to do that. See https://github.com/AdoptOpenJDK/jitwatch .

The newest version!

/*
 * Copyright (c) 2013-2016 Chris Newland.
 * Licensed under https://github.com/AdoptOpenJDK/jitwatch/blob/master/LICENSE-BSD
 * Instructions: https://github.com/AdoptOpenJDK/jitwatch/wiki
 */
package org.adoptopenjdk.jitwatch.jarscan.invokecount;

import java.util.List;
import org.adoptopenjdk.jitwatch.jarscan.IJarScanOperation;
import org.adoptopenjdk.jitwatch.model.bytecode.BytecodeInstruction;
import org.adoptopenjdk.jitwatch.model.bytecode.MemberBytecode;
import org.adoptopenjdk.jitwatch.model.bytecode.Opcode;
import org.adoptopenjdk.jitwatch.util.ParseUtil;

public class InvokeCountOperation implements IJarScanOperation
{
	private InvokeMethodCountMap opcodeInvokeCountMap;

	private int limitPerInvoke;
	
	public InvokeCountOperation(int limitPerInvoke)
	{
		opcodeInvokeCountMap = new InvokeMethodCountMap();
		
		this.limitPerInvoke = limitPerInvoke;
	}

	@Override
	public String getReport()
	{
		return opcodeInvokeCountMap.toString(limitPerInvoke);
	}
	
	private void count(String className, BytecodeInstruction instruction)
	{			
		String comment = instruction.getCommentWithMemberPrefixStripped();
		
		String methodSig = ParseUtil.bytecodeMethodCommentToReadableString(className, comment);
	
		opcodeInvokeCountMap.countInvocationOfMethod(instruction.getOpcode(), methodSig);
	}
	
	@Override
	public void processInstructions(String className, MemberBytecode memberBytecode)
	{
		List instructions = memberBytecode.getInstructions();

		for (BytecodeInstruction instruction : instructions)
		{
			Opcode opcode = instruction.getOpcode();

			switch (opcode)
			{
			case INVOKEDYNAMIC:
			case INVOKEINTERFACE:
			case INVOKESPECIAL:
			case INVOKESTATIC:
			case INVOKEVIRTUAL:
				count(className, instruction);
				break;
				
			default:
				break;
			}
		}

	}
}