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lang-java-jvm.md

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lang-java-jvm
java
jvm
lang
2019-07-03T05:33:54.419Z
2020-07-14T09:26:44.529Z

lang-java-jvm

classloader

gc

GraalVM

  • GraalVM is a universal virtual machine for running applications written in JavaScript, Python, Ruby, R, JVM-based languages like Java, Scala, Groovy, Kotlin, Clojure, and LLVM-based languages such as C and C++.
  • 支持多语言编程的通用虚拟机
  • 项目的各组件大多以GPLv2的协议发布
  • GraalVM CE is available for free for development and production use.
  • 目前支持Linux和Mac，不支持Windows
  • GraalVM开发了「跨语言互操作协议」，它是一种特殊的接口协议，每种运行在GraalVM之上的语言都要实现这种协议，这样就能保证跨语言的互操作性。 语言和语言之间无须了解对方就可以高效传值。该协议还在不断改进中，未来会支持更多特性。
  • Oracle于20180417发布
  • 主要组件
    • Graal：一个由Java语言编写的JIT编译器
    • SubstrateVM：一个对执行容器抽象层的轻量级封装
    • Truffle：一个用于构建语言解析器的工具集和API
  • The Java architects worked to support multilingualism starting in Java 7 by conversions to Java bytecode by adding invokedynamic to the JVM specification.
  • The GraalVM team felt that since Java bytecode had too much Java semantics built into it, a longer term effort could be much more efficient and a 100% compatible implementation at that.