Skeleton of Jit implementation with Cheerp

cheerp_jit.cpp

namespace [[cheerp::genericjs]] client {
     //forward declare a bunch of JavaScript APIs existing on the browser
     namespace WebAssembly {
     public:
         Promise* instantiate(ArrayBuffer* code, ImportObject* imports);
     };
}

[[cheerp::genericjs]] void onSuccess(ModuleAndInstance* res) {
    auto start_function = res->get_instance()->get_start_function();
    start_function();
}

[[cheerp::genericjs]] void onFailure(Error* error){
     //do something
}

[[cheerp::genericjs]] void compile_and_execute(const ByteCode& bytecode) {
     ArrayBuffer*array = new ArrayBuffer(bytecode.size());
     for (int i=0; i<bytecode.size(); i++) array->set(i, bytecode[i]);
     ImportObject * imports = new Object();
     //initialize imports with whatever method needed
     Promise* result = WebAssembly::instantiate(array, imports);
     result->then( onSuccess, onFailure );
}