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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

BUILD.bazel

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

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

exec_server.rs

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

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

README.md

[codex] Add hermetic Wine exec-server test (#27937 )

2026-06-12 20:20:23 -07:00

wine_exec_server.rs

core: load AGENTS.md from foreign environments (#28958 )

2026-06-18 15:06:23 -07:00

wine_remote_test_runner.rs

Test repository-wide Rust formatter discovery (#41925 )

2026-08-31 22:47:53 +00:00

README.md

Windows exec-server fixture

This directory contains the small Windows exec-server binary used by foreign-OS tests. It links only codex-exec-server because the full Codex Windows graph does not yet cross-build with Bazel.