denoland-deno/cli/tests/testdata/wasm_url.js at d39094913e91e5193f63459d9c5ca6ddc7779477 - foster/denoland-deno - Foster's Laboratory

foster/denoland-deno

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Andreu Botella 5edd277161

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.

2021-10-10 16:03:23 +02:00

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 const module = await WebAssembly.compileStreaming(
   fetch("http://localhost:4545/unreachable.wasm"),
 );
 const instance = new WebAssembly.Instance(module);
 // Compare the stack trace with wasm_unreachable.js, which compiles the WASM
 // module with synchronous APIs.
 instance.exports.unreachable();