跟踪java字节码流 [英] Trace java bytecode stream
问题描述
我希望看到它正在执行的JVM的当前（字节码）指令流。经过一些googleing，我发现jvm调试版本提供了 -XX：+ TraceBytecodes 选项（参见此处）。但是，提到的热点JVM调试版本的链接已经死了，我无法在线找到调试版本：/
I would like to see the current (bytecode) instruction stream of the JVM it is executing. After some googleing, I found that the jvm debug build offers the -XX:+TraceBytecodesoption (see here). However, the mentioned link to the hotspot JVM debug build is dead and I could not find a debug build online :/
是否有其他方法可以跟踪jvm字节码流或有人能指出我正确的方向吗？我正在运行64位ubuntu 16.04。
Is there another way to trace the jvm bytecode stream or can someone point me in the right direction? I'm running 64 bit ubuntu 16.04.
P.S：我知道，打印完整的指令流会非常缓慢。但是，我很好奇
P.S: I know, its going to be painfully slow to print out the complete instruction stream. However, I am curios
推荐答案
-XX：+ TraceBytecodes 选项是到底是你在找什么？它在HotSpot JVM的调试版本中可用。您可以自己轻松构建JVM - 只需HotSpot，甚至不是JDK。
-XX:+TraceBytecodes option is exactly what are you looking for. It is available in debug builds of HotSpot JVM. You can easily build JVM yourself - just HotSpot, not even JDK.
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从OpenJDK 8项目克隆热点存储库
Clone hotspot repository from OpenJDK 8 project
hg clone http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot
构建'fastdebug'JVM（假设JDK已安装在 /usr/java/jdk1.8.0_102 ）
cd hotspot/make
make ALT_BOOTDIR=/usr/java/jdk1.8.0_102 ARCH_DATA_MODEL=64 fastdebug
您可以添加 HOTSPOT_BUILD_JOBS = N 在 N 并行进程中运行编译。
You may add HOTSPOT_BUILD_JOBS=N to run compilation in N parallel processes.
运行它
export ALT_JAVA_HOME=/usr/java/jdk1.8.0_102
../build/linux/linux_amd64_compiler2/fastdebug/hotspot -XX:+TraceBytecodes MainClass
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