Nathan Whitaker b6c0313d7e fix(node): Rework node:child_process IPC (#24763) ... Fixes https://github.com/denoland/deno/issues/24756. Fixes https://github.com/denoland/deno/issues/24796. This also gets vitest working when using [`--pool=forks`](https://vitest.dev/guide/improving-performance#pool) (which is the default as of vitest 2.0). Ref https://github.com/denoland/deno/issues/23882. --- This PR resolves a handful of issues with child_process IPC. In particular: - We didn't support sending typed array views over IPC - Opening an IPC channel resulted in the event loop never exiting - Sending a `null` over IPC would terminate the channel - There was some UB in the read implementation (transmuting an `&[u8]` to `&mut [u8]`) - The `send` method wasn't returning anything, so there was no way to signal backpressure (this also resulted in the benchmark `child_process_ipc.mjs` being misleading, as it tried to respect backpressure. That gave node much worse results at larger message sizes, and gave us much worse results at smaller message sizes). - We weren't setting up the `channel` property on the `process` global (or on the `ChildProcess` object), and also didn't have a way to ref/unref the channel - Calling `kill` multiple times (or disconnecting the channel, then calling kill) would throw an error - Node couldn't spawn a deno subprocess and communicate with it over IPC (cherry picked from commit cd59fc53a5)		2024-07-31 20:27:08 +02:00
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child_process_ipc.mjs	fix(node): Rework node:child_process IPC (#24763)	2024-07-31 20:27:08 +02:00