feat: Show the URL of streaming WASM modules in stack traces (#12268)

WebAssembly modules compiled through `WebAssembly.compile()` and similar
non-streaming APIs don't have a URL associated to them, because they
have been compiled from a buffer source. In stack traces, V8 will use
a URL such as `wasm://wasm/d1c677ea`, with a hash of the module.

However, wasm modules compiled through streaming APIs, like
`WebAssembly.compileStreaming()`, do have a known URL, which can be
obtained from the `Response` object passed into the streaming APIs. And
as per the developer-facing display conventions in the WebAssembly
Web API spec, this URL should be used in stack traces. This change
implements that.

1 files changed, 3 insertions, 0 deletions

diff --git a/ext/fetch/26_fetch.js b/ext/fetch/26_fetch.js
index f74726242..fcfa75318 100644
--- a/ext/fetch/26_fetch.js
+++ b/ext/fetch/26_fetch.js
@@ -526,6 +526,9 @@
           throw new TypeError(`HTTP status code ${res.status}`);
         }
 
+        // Pass the resolved URL to v8.
+        core.opSync("op_wasm_streaming_set_url", rid, res.url);
+
         // 2.6.
         // Rather than consuming the body as an ArrayBuffer, this passes each
         // chunk to the feed as soon as it's available.