bindings-graalvm241-emscripten

// Create Host and run code
EmbedderHost {
    fileSystem {
        unrestricted = true
    }
}.use(::executeCode)

private fun executeCode(embedderHost: EmbedderHost) {
    val HELLO_WORLD_MODULE_NAME: String = "helloworld"

    // Prepare Source
    val source = Source.newBuilder("wasm", App::class.java.getResource("helloworld.wasm"))
        .name(HELLO_WORLD_MODULE_NAME)
        .build()

    // Setup Polyglot Context
    val context: Context = Context.newBuilder().build()
    context.use {
        // Context must be initialized before installing modules
        context.initialize("wasm")

        // Setup modules
        val installer = GraalvmHostFunctionInstaller(context) {
            host = embedderHost
        }
        installer.setupWasiPreview1Module()
        val emscriptenInstaller = installer.setupEmscriptenFunctions()

        // Evaluate the WebAssembly module
        context.eval(source)

        // Finish initialization after module instantiation
        emscriptenInstaller.finalize(HELLO_WORLD_MODULE_NAME).use { emscriptenEnv ->
            // Initialize Emscripten runtime environment
            emscriptenEnv.emscriptenRuntime.initMainThread()

            // Execute code
            val mainFunction = context.getBindings("wasm").getMember(HELLO_WORLD_MODULE_NAME).getMember("main")
            mainFunction.execute(
                /* argc */ 0,
                /* argv */0,
            ).asInt()
        }
    }
}