关于 LLVM 的介绍 LLVM 介绍 -CSDN博客

Jeandle is a Just-in-Time compiler for Java. It is built on OpenJDK and leverages the LLVM compiler infrastructure to generate machine code, aiming to provide powerful compilation optimizations and deliver high-performance code.

https://github.com/jeandle/jeandle-jdk

This repository is responsible for the LLVM-related parts of Jeandle.

https://github.com/jeandle/jeandle-llvm

Jeandle 是基于 OpenJDK Hotspot JVM 的全新 Just-In-Time(简称 JIT,即时)编译器,利用 LLVM 进行编译优化与代码生成,将 LLVM 的性能优势和生态优势引入 JVM 中。

Jeandle 中文: 筋斗云 。 

为国内的「新创」项目,阿里集团对 Java 的底层能力贡献又多了一个「干将」。

阿里巴巴贡献了 JDK 

Dragon Well  

Dragonwellhttps://dragonwell-jdk.io/#/index

YVM

qingfeng.yy@alibaba-inc.com 在 GitHub 是这个阿里巴巴邮箱。

https://github.com/y1yang0

https://github.com/y1yang0/yvm

This is a toy Java virtual machine(JVM) that supports many of Java's language features, it also comes with an experimental mark-sweep garbage collector. The implementation of this JVM follows the Java Virtual Machine Specification 8. I don't have enough time to write unit tests for each component, and I don't implement the full Java language features, but as far as pleasing myself, I think it's enough. If you find any bugs, or you want to implement any missing features, you can create an issue or pull request, respectively.

root@ubuntu:~/yvm/src$ tree .
.
├── classfile               
│   ├── AccessFlag.h        # Access flag of class, method, field
│   ├── ClassFile.h         # Parse .class file
│   └── FileReader.h        # Read .class file
├── gc
│   ├── Concurrent.cpp      # Concurrency utilities
│   ├── Concurrent.hpp
│   ├── GC.cpp              # Garbage collector
│   └── GC.h
├── interpreter
│   ├── CallSite.cpp        # Call site to denote a concrete calling
│   ├── CallSite.h
│   ├── Internal.h          # Types that internally used
│   ├── Interpreter.cpp     # Interpreter
│   ├── Interpreter.hpp
│   ├── MethodResolve.cpp   # Resolve call site
│   └── MethodResolve.h
├── misc
│   ├── Debug.cpp           # Debugging utilities
│   ├── Debug.h
│   ├── NativeMethod.cpp    # Java native methods
│   ├── NativeMethod.h
│   ├── Option.h            # VM arguments and options
│   ├── Utils.cpp           # Tools and utilities
│   └── Utils.h
├── runtime
│   ├── JavaClass.cpp       # Internal representation of java.lang.Class
│   ├── JavaClass.h
│   ├── JavaException.cpp   # Exception handling
│   ├── JavaException.h
│   ├── JavaFrame.cpp       # Execution frame
│   ├── JavaFrame.hpp
│   ├── JavaHeap.cpp        # Java heap, where objects are located
│   ├── JavaHeap.hpp
│   ├── JavaType.h          # Java type definitions
│   ├── ClassSpace.cpp      # Store JavaClass
│   ├── ClassSpace.h
│   ├── ObjectMonitor.cpp   # synchronized(){} block implementation
│   ├── ObjectMonitor.h
│   ├── RuntimeEnv.cpp      # Runtime structures
│   └── RuntimeEnv.h
└── vm
    ├── Main.cpp             # Parse command line arguments
    ├── YVM.cpp              # Abstraction of virtual machine
    └── YVM.h

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腾讯云没有 JVM ,但有自己的 JDK  :  Tencent JDK——Kona

https://github.com/Tencent/TencentKona-17

目前,Kona 有 8 、 11 、 17 三个版本。

-----------------------------------

阿里巴巴的 JDK —— ,也有三个版本 8 、 11 、 21 。

Alibaba Dragonwell, as a downstream version of OpenJDK, is the in-house OpenJDK implementation at Alibaba. 

可以参考的一篇文章

What is LLVM? The power behind Swift, Rust, Clang, and more

What is LLVM? The power behind Swift, Rust, Clang, and more | InfoWorld

JDK \ JRE \ JVM 的关系,以及 Open JDK \ Oracle Java SE \ IBM Semeru \ OpenJ9 \ Temurin JDK 之间的关系

https://blog.csdn.net/D1237890/article/details/151730974

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