JVM in TypeScript

Blog post: 用Typescript实现JVM | 打杂日志

Setup

$ node --version
v14.16.1
$ npm i
$ npm link

Verify

$ ./test.sh

Class Viewer

$ classviewer <path/to/.class>

Debugger

• enable with --debug flag
• commands
  • print string
    • string stack <n>: print string at stack #n
    • string statics <n>: print string at static vars #n in current class
    • string <n>: print string at local vars #n
  • print class
    • class stack <n>: print class at stack #n
    • class var <n>: print class at ocal vars #n
  • print fields
    • fields stack <n>: print field at stack #n
    • fields var <n>: print field at local vars #n
  • print const
    • const <n>: print const {n} in current class' constant pool
  • print statics
    • statics: print static vars of current class
  • step
    • <Return>: next instruction
    • step over: next instruction in current method
  • breakpoint
    • bp <n>: set breakpoint at pc #n in current frame
  • continue
    • run: resume running

References

• https://github.com/zxh0/jvmgo-book