What are the details that you mean? I just skimmed the spec and I don't see anything significant about exceptions or gc... it mostly seems focused on the WASM

What are the details that you mean? I just skimmed the spec and I don't see anything significant about exceptions or gc... it mostly seems focused on the WASM memory layout and the instruction set. The instruction set seems at least superficially similar to the java instruction set, and operates on a "linear memory" which could easily be implemented in java as a large array of int[] for 32 bit or long[] for 64 bit (although that scheme may need to be more complicated if it is to be shared across threads). Any instruction that doesn't have a direct analog in the jvm could be implemented as a static java method. Also WASM seems to use a static set of labels as branch targets rather than reading its instructions from the program memory (is that called harvard architecture?) which seems to suggest that you could translate WASM functions into java classes/functions to be loaded into the JVM. In any case I don't have time to implement all of that but it seems like it could be any interesting way to run non-java libraries on the JVM