Free Wortley df3ecee6f0 Launch Linux pipe processes through a fresh setup helper (#47612) ...

## Why

Linux pipe launches need session, parent-death signal, and descriptor setup. Move this work into a fresh, single-threaded executable image to avoid forking the app-server for child setup.

## What changed

- Register an early setup helper and launch it through `posix_spawn` for Linux pipe processes.
- Start the helper with an empty environment, then transfer the target environment over a control socket so loader settings cannot interfere with helper startup.
- Await target execution asynchronously, propagate setup and execution errors, and kill incomplete launches on cancellation.
- Preserve direct spawning as a fallback when the helper is unavailable or fails before target execution.

## Testing

Add coverage for launch semantics, avoiding fork, loader environment isolation, early argument dispatch, closed standard descriptors, and fallback under bootstrap failure or descriptor pressure. Add an app-server regression test that reuses a process handle after an execution failure.

GitOrigin-RevId: 079c673f0f22ebd531f8c57e5338095cc98acfdc

2026-09-23 18:25:07 +00:00

..

src

Launch Linux pipe processes through a fresh setup helper (#47612)

2026-09-23 18:25:07 +00:00

BUILD.bazel

feat: add support for building with Bazel (#8875)

2026-01-09 11:09:43 -08:00

Cargo.toml

Launch Linux pipe processes through a fresh setup helper (#47612)

2026-09-23 18:25:07 +00:00