trusteddataframework / lotusvm

LotusVM

A web assembly 1.0 interpreter implementation in pure java. This interpreter intended to provide a smart contract runtime for block chain.

We use off-heap memory to avoid frequently garbage collection (See UnsafeMemory.java, UnsafeStackAllocator.java and InstructionPool.java). The UnsafeMemory and UnsafeStackAllocator should be closed explicitly.

• How to Use?

See src/test/org.tdf.lotusvm.Bench.java

Not support:

1. sign-extension operators
2. return multi-value
3. floating number operations, i.e. f32.const, f32_nearest, f64_round (undefined behavior in some platform and error-prone)

TODO:

1. module validation
2. dynamically compile .wasm to java byte code