embind and webldl not work on v8

[Wenqian Tian]

Hi,

I'm currently trying exploring expose C++ objects and classes to V8 Javascript engine using embind or webidl.

I use

emcc glue_wrapper.cc -s WASM=1 -s EXPORTED_FUNCTIONS="['_malloc']" --post-js glue.js --post-js post-script.js -o webidl.js

to create target js file and wasm. In order to run webidl.js file and load wasm file in v8, I modify the webidl.js a little, modify

function instantiateArrayBuffer(receiver) {

getBinaryPromise().then(function(binary) {

return WebAssembly.instantiate(binary, info);

}).then(receiver, function(reason) {

err('failed to asynchronously prepare wasm: ' + reason);

abort(reason);

});

}

to

function instantiateArrayBuffer(receiver) {

let module = new WebAssembly.Module(Module['wasmBinary']);

let instance = new WebAssembly.Instance(module, info);

receiveInstance(instance);

}

and Module['wasmBinary'] has already contained the binary data of target wasm file before load the webidl.js file.

I have load the target js file and wasm file successfully . But when I run the exported c++ class/method in js file, like this

var _t = new WebIDL(10, "YHSPY");

console.log(_t.getValueX());

console.log(_t.getValueStr());

Module.destroy(_t);

it reports

 Uncaught TypeError: Cannot read property 'apply' of undefined, location: webidl.js:0:0
    STACK:
    [0]asm._malloc   webidl.js:2242
    [1]Module._malloc webidl.js:2351
    [2]prepare webidl.js:2792
    [3]WebIDL webidl.js:2883
    [4]anonymous main.js:32

I have tried embind, but has similar problem. I use

emcc glue_wrapper.cc -s WASM=1 -s EXPORTED_FUNCTIONS="['_malloc']" --post-js glue.js --post-js post-script.js -o webidl.html

to create target html file and test it in brower. It works well.

can anyone give some help ?

Thanks,

wqtian