org.adoptopenjdk.jitwatch.jarscan.allocationcount.AllocationCountOperation Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jitwatch-jarscan-maven-plugin Show documentation

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.allocationcount;

import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.S_DOUBLE_QUOTE;
import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.S_EMPTY;
import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.S_SLASH;
import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.S_DOT;

import java.util.List;

import org.adoptopenjdk.jitwatch.jarscan.IJarScanOperation;
import org.adoptopenjdk.jitwatch.model.bytecode.BytecodeInstruction;
import org.adoptopenjdk.jitwatch.model.bytecode.IBytecodeParam;
import org.adoptopenjdk.jitwatch.model.bytecode.MemberBytecode;
import org.adoptopenjdk.jitwatch.model.bytecode.Opcode;

public class AllocationCountOperation implements IJarScanOperation
{
	private InstructionAllocCountMap opcodeAllocCountMap;

	private int limitPerAllocOpcode;

	public AllocationCountOperation(int limit)
	{
		opcodeAllocCountMap = new InstructionAllocCountMap();
		this.limitPerAllocOpcode = limit;
	}

	@Override
	public String getReport()
	{
		return opcodeAllocCountMap.toString(limitPerAllocOpcode);
	}

	private void count(Opcode opcode, String type)
	{
		opcodeAllocCountMap.count(opcode, type);
	}

	@Override
	public void processInstructions(String className, MemberBytecode memberBytecode)
	{
		List instructions = memberBytecode.getInstructions();

		for (BytecodeInstruction instruction : instructions)
		{
			Opcode opcode = instruction.getOpcode();
			
			switch (opcode)
			{
			case NEWARRAY:
			{
				List params = instruction.getParameters();
				String type = params.get(0).toString();
				count(opcode, type);
			}
				break;

			case ANEWARRAY:
			case NEW:
			case MULTIANEWARRAY:
			{
				String comment = instruction.getComment();
				String type = comment.substring("// class ".length(), comment.length());
				type = type.replace(S_DOUBLE_QUOTE, S_EMPTY).replace(S_SLASH, S_DOT);
				count(opcode, type);
			}
				break;

			default:
				break;
			}
		}
	}
}