Introduction

Build and Run

# Note, C++14 is required at least.$cd yvm$ cmake.$ make$ ./yvmUsage:  yvm --lib=<path><main_class>      --lib=<path>     Tells YVM where to find JDK classes(java.lang.String, etc)<main_class>     The full qualified Java class name, e.g. org.example.Foo$ ./yvm --lib=/path/to/yvm/bytecode ydk.test.QuickSort0 1 1 1 1 1 4 4 4 5 6 7 7 9 9 9 12 74 96 98 8989

Implemented Features

Hacking Guide

1. How does it work

2. Code structure

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

License