为什么 HotSpot JVM 的 memory model 不遵守 JVM Specification

[taogen]

JVM Specification memory model

• Program Counter (PC) Register
• JVM Stacks
• Native Method Stacks
• Heap
  • Method Area
  • Run-time Constant Pool

Java 8 HotSpot JVM memory model

• Java Heap
  • Young Generation
    • Eden
    • Survivor
    • Virtual
  • Old Generation
• Metaspace
  • Compressed Class Space
• CodeCache
• Native Memory

[Jooooooooo]

两个完全不同的东西