《深入理解Java虚拟机》学习系列环境准备篇

2017-11-29

本学习系列将基于《深入理解Java虚拟机》第2版
环境使用 CentOS 6.5 64.bit 操作系统。
选择安装 OpenJDK 8。

切换 CentOS 6.5 镜像源

[root@localhost openjdk]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# mv CentOS-Base.repo CentOS-Base.repo.bk
[root@localhost yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
[root@localhost yum.repos.d]# yum clean all
[root@localhost yum.repos.d]# yum makecache

安装 Bootstrap JDK

参考官方说明，CentOS 6.5 下执行 yum install java-1.8.0-openjdk

1	[root@localhost Desktop]# yum -y install java-1.8.0-openjdk

安装完毕以后执行 java -version :

[root@localhost Desktop]# java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)

下载 OpenJDK 1.8 源码

安装 hg：

1	[root@localhost Desktop]# yum -y install hg

执行下载：

1	[root@localhost Desktop]# hg clone http://hg.openjdk.java.net/jdk8u/jdk8u openjdk8

该方式非常缓慢，经常中断，故直接从网站通过其他方式下载源码：下载链接

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[root@localhost Desktop]# ll
total 121192
-rw-r--r--. 1 root root 124099402 Nov 29 15:36 openjdk-8-src-b132-03_mar_2014.zip

安装编译依赖

1	[root@localhost Desktop]# yum -y install alsa-lib-devel cups-devel libX* gcc gcc-c++ freetype-devel libstdc++-static ant make

编译配置

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[root@localhost Desktop]# cd openjdk
[root@localhost openjdk]# chmod +x configure
[root@localhost openjdk]# ./configure --enable-debug

编译

1	[root@localhost openjdk]# make CONF=linux-x86_64-normal-server-fastdebug

出现如下信息，表示编译结束：

----- Build times -------
Start 2017-11-29 15:55:35
End   2017-11-29 16:04:09
00:00:25 corba
00:04:38 hotspot
00:00:14 jaxp
00:00:19 jaxws
00:02:25 jdk
00:00:33 langtools
00:08:34 TOTAL
-------------------------
Finished building OpenJDK for target 'default'

验证

[root@localhost openjdk]# build/linux-x86_64-normal-server-fastdebug/jdk/bin/java -version
openjdk version "1.8.0-internal-fastdebug"
OpenJDK Runtime Environment (build 1.8.0-internal-fastdebug-root_2017_11_29_15_46-b00)
OpenJDK 64-Bit Server VM (build 25.0-b70-fastdebug, mixed mode)

[root@localhost openjdk]# java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)