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JAVA实时反编译

初衷：在开发pinpoint,skywalking agent过程中有时候想看看修改后的字节码.
打包方式：在目录下执行：mvn clean install -Dmaven.test.skip，
启动方式：执行后打包命令后在starter/target后生成：friday-starter.tar.gz，解压后执行bin/run.sh即可
原理：通过java agent方式调用Instrumentation#retransformClasses方法，保存JVM返回的字节码，然后调用cfr将其反编译为JAVA类
声明：只在macOS系统下进行过测试，原理上应该能够支持windows，linux。因为获取进程号调用的是openjdk的tools.jar，目前暂不支持其他jdk，如openj9
更新：2021.4.20 添加搜索窗口，为了方便只能使用类全名搜索，希望以后搜索之后能够在左边的树结构中定位到。
已知问题：1. 在启动不了的时候，请尝试通过 debug 方式启动。 2. 有同学反映需要在 jdk8 下启动。

start.png (2880×1800)

1.Decompiler pinpoint agent

pinpoint-runtime.png (2880×1800)

2.Decompiler skywalking agent

skywalking-runtime.png (2880×1800)

skywalking-runtime-proxy.png (2880×1800)

Search every class in your jvm

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