yaoliao
yaoliao
/ FlameGraph.java
Created
August 14, 2020 08:32
— forked from apangin/FlameGraph.java
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| /* | |
| * Copyright 2018 Andrei Pangin | |
| * | |
| * This is a specialized Java port of the FlameGraph script available at | |
| * https://github.com/brendangregg/FlameGraph/blob/master/flamegraph.pl | |
| * | |
| * Copyright 2016 Netflix, Inc. | |
| * Copyright 2011 Joyent, Inc. All rights reserved. | |
| * Copyright 2011 Brendan Gregg. All rights reserved. | |
| * |
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| package com.example.demo.jol; | |
| import org.openjdk.jol.info.ClassLayout; | |
| import java.io.IOException; | |
| import java.util.concurrent.TimeUnit; | |
| /** | |
| * @author: TuGai | |
| * @createTime: 2020-04-15 19:48 |
yaoliao
/ ObjectHeader32.txt
Created
April 6, 2020 15:19
— forked from arturmkrtchyan/ObjectHeader32.txt
Java Object Header
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| |----------------------------------------------------------------------------------------|--------------------| | |
| | Object Header (64 bits) | State | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | Mark Word (32 bits) | Klass Word (32 bits) | | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | identity_hashcode:25 | age:4 | biased_lock:1 | lock:2 | OOP to metadata object | Normal | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | thread:23 | epoch:2 | age:4 | biased_lock:1 | lock:2 | OOP to metadata object | Biased | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | |
yaoliao
/ InstrumentationSupport.java
Last active
April 6, 2020 14:55
获取 Instrumentation copy from jol
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| /* | |
| * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle in the LICENSE file that accompanied this code. | |
| * |