Linux 下载配置Hsdis 、JITWatch

1. 下载配置 Hsdis

之前是在网站 https://kenai.com/projects/base-hsdis/downloads 可以下载到，但是该网站现已关闭, 在github 上找到一个仓库提供

git clone https://github.com/liuzhengyang/hsdis
cd hsdis
tar -zxvf binutils-2.26.tar.gz
make BINUTILS=binutils-2.26 ARCH=amd64

复制 hsdis-amd64.so 文件到 {java_home}/jre/lib/amd64/server

sudo cp build/linux-amd64/hsdis-amd64.so /usr/lib/jvm/java-8-oracle/jre/lib/amd64/server

输入一下命令验证是否配置成功

java -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -version

输出如下所示，则表明配置成功

Java HotSpot(TM) 64-Bit Server VM warning: PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output
Loaded disassembler from /usr/lib/jvm/java-8-oracle/jre/lib/amd64/server/hsdis-amd64.so
Decoding compiled method 0x00007f3a7110a010:
Code:
[Disassembling for mach='i386:x86-64']
[Entry Point]
[Constants]
...

使用 Hsdis 执行代码，输出反汇编内容

javac A.java
java -server -XX:+UnlockDiagnosticVMOptions -XX:+TraceClassLoading  -XX:+PrintAssembly -XX:+LogCompilation -XX:LogFile=live.log A    # A是java文件类名, live.log 是输出的 log 文件

2. JITWatch

1. 下载启动

git clone https://github.com/AdoptOpenJDK/jitwatch
cd jitwatch
./launchUI.sh

2. 选择 open log，点击 start

   
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3. 点击 sanbox ，选择open，选择要分析的 java 文件，点击 run

   
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参考链接
https://cloud.tencent.com/developer/article/1170384