denoland-deno/cli/tests/testdata/wasm_streaming_panic_test.js at 4154e95ae55226fe1290ccd9c7262abadb60934f - foster/denoland-deno - Foster's Laboratory

foster/denoland-deno

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Andreu Botella d523cc2abc fix(fetch): Fix uncaught rejection panic with WebAssembly.instantiateStreaming (#13925 )

When an exception is thrown during the processing of streaming WebAssembly,
`op_wasm_streaming_abort` is called. This op calls into V8, which synchronously
rejects the promise and calls into the promise rejection handler, if applicable.
But calling an op borrows the isolate's `JsRuntimeState` for the duration of the
op, which means it is borrowed when V8 calls into `promise_reject_callback`,
which tries to borrow it again, panicking.

This change changes `op_wasm_streaming_abort` from an op to a binding
(`Deno.core.abortWasmStreaming`). Although that binding must borrow the
`JsRuntimeState` in order to access the `WasmStreamingResource` stored in the
`OpTable`, it also takes ownership of that `WasmStreamingResource` instance,
which means it can drop any borrows of the `JsRuntimeState` before calling into
V8.

2022-03-24 13:39:10 +11:00

3 lines

102 B

JavaScript

Raw Blame History

	`// https://github.com/denoland/deno/issues/13917`

	`WebAssembly.instantiateStreaming(Response.error());`