mirror of
https://github.com/denoland/deno.git
synced 2024-12-11 01:58:05 -05:00
542d9e7620
`handleWasmStreaming` is the function that provides the binding with the `fetch` API needed for `WebAssembly.instantiateStreaming()` and `WebAssembly.compileStreaming()`. When I implemented it in #11200, I thought V8 was calling these functions with the argument of the `WebAssembly` streaming functions, without doing any resolving, and so `handleWasmStreaming` awaits for the parameter to resolve. However, as discovered in https://github.com/denoland/deno/issues/13917#issuecomment-1065805565, V8 does in fact resolve the parameter if it's a promise (and handles rejections arising from that). This change removes the `async` IIFE inside `handleWasmStreaming`, letting initial errors be handled synchronously (which will however not throw synchronously from the `WebAssembly` namespace functions). Awaiting is still necessary for reading the bytes of the response, though, and so there is an `async` IIFE for that.
102 lines
3.3 KiB
TypeScript
102 lines
3.3 KiB
TypeScript
import { assert, assertEquals, assertRejects } from "./test_util.ts";
|
|
|
|
// The following blob can be created by taking the following s-expr and pass
|
|
// it through wat2wasm.
|
|
// (module
|
|
// (func $add (param $a i32) (param $b i32) (result i32)
|
|
// local.get $a
|
|
// local.get $b
|
|
// i32.add)
|
|
// (export "add" (func $add))
|
|
// )
|
|
// deno-fmt-ignore
|
|
const simpleWasm = new Uint8Array([
|
|
0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x07, 0x01, 0x60,
|
|
0x02, 0x7f, 0x7f, 0x01, 0x7f, 0x03, 0x02, 0x01, 0x00, 0x07, 0x07, 0x01,
|
|
0x03, 0x61, 0x64, 0x64, 0x00, 0x00, 0x0a, 0x09, 0x01, 0x07, 0x00, 0x20,
|
|
0x00, 0x20, 0x01, 0x6a, 0x0b
|
|
]);
|
|
|
|
Deno.test(async function wasmInstantiateWorksWithBuffer() {
|
|
const { module, instance } = await WebAssembly.instantiate(simpleWasm);
|
|
assertEquals(WebAssembly.Module.exports(module), [{
|
|
name: "add",
|
|
kind: "function",
|
|
}]);
|
|
assertEquals(WebAssembly.Module.imports(module), []);
|
|
assert(typeof instance.exports.add === "function");
|
|
const add = instance.exports.add as (a: number, b: number) => number;
|
|
assertEquals(add(1, 3), 4);
|
|
});
|
|
|
|
// V8's default implementation of `WebAssembly.instantiateStreaming()` if you
|
|
// don't set the WASM streaming callback, is to take a byte source. Here we
|
|
// check that our implementation of the callback disallows it.
|
|
Deno.test(
|
|
async function wasmInstantiateStreamingFailsWithBuffer() {
|
|
await assertRejects(async () => {
|
|
await WebAssembly.instantiateStreaming(
|
|
// Bypassing the type system
|
|
simpleWasm as unknown as Promise<Response>,
|
|
);
|
|
}, TypeError);
|
|
},
|
|
);
|
|
|
|
Deno.test(
|
|
async function wasmInstantiateStreamingNoContentType() {
|
|
const response = new Response(simpleWasm);
|
|
// Rejects, not throws.
|
|
const wasmPromise = WebAssembly.instantiateStreaming(response);
|
|
await assertRejects(
|
|
() => wasmPromise,
|
|
TypeError,
|
|
"Invalid WebAssembly content type.",
|
|
);
|
|
},
|
|
);
|
|
|
|
Deno.test(async function wasmInstantiateStreaming() {
|
|
let isomorphic = "";
|
|
for (const byte of simpleWasm) {
|
|
isomorphic += String.fromCharCode(byte);
|
|
}
|
|
const base64Url = "data:application/wasm;base64," + btoa(isomorphic);
|
|
|
|
const { module, instance } = await WebAssembly.instantiateStreaming(
|
|
fetch(base64Url),
|
|
);
|
|
assertEquals(WebAssembly.Module.exports(module), [{
|
|
name: "add",
|
|
kind: "function",
|
|
}]);
|
|
assertEquals(WebAssembly.Module.imports(module), []);
|
|
assert(typeof instance.exports.add === "function");
|
|
const add = instance.exports.add as (a: number, b: number) => number;
|
|
assertEquals(add(1, 3), 4);
|
|
});
|
|
|
|
Deno.test(
|
|
{ permissions: { read: true } },
|
|
async function wasmFileStreaming() {
|
|
const url = new URL("../testdata/unreachable.wasm", import.meta.url);
|
|
assert(url.href.startsWith("file://"));
|
|
|
|
const { module } = await WebAssembly.instantiateStreaming(fetch(url));
|
|
assertEquals(WebAssembly.Module.exports(module), [{
|
|
name: "unreachable",
|
|
kind: "function",
|
|
}]);
|
|
},
|
|
);
|
|
|
|
Deno.test(
|
|
{ permissions: { net: true } },
|
|
async function wasmStreamingNonTrivial() {
|
|
// deno-dom's WASM file is a real-world non-trivial case that gave us
|
|
// trouble when implementing this.
|
|
await WebAssembly.instantiateStreaming(fetch(
|
|
"http://localhost:4545/deno_dom_0.1.3-alpha2.wasm",
|
|
));
|
|
},
|
|
);
|