Dylan Hurd 32aad7bd13 Serialize legacy Windows PowerShell sandbox tests (#19453)
## Why

Recent `main` CI had repeated Windows timeouts in the legacy sandbox
process tests:

- `codex-windows-sandbox
session::tests::legacy_capture_powershell_emits_output` failed in runs
[24909500958](https://github.com/openai/codex/actions/runs/24909500958),
[24908076251](https://github.com/openai/codex/actions/runs/24908076251),
[24906197645](https://github.com/openai/codex/actions/runs/24906197645),
[24905411571](https://github.com/openai/codex/actions/runs/24905411571),
[24903336028](https://github.com/openai/codex/actions/runs/24903336028),
and
[24898949647](https://github.com/openai/codex/actions/runs/24898949647).
- `legacy_tty_powershell_emits_output_and_accepts_input` failed in the
same set of runs.
- `legacy_non_tty_cmd_emits_output` failed in runs
[24909500958](https://github.com/openai/codex/actions/runs/24909500958),
[24908076251](https://github.com/openai/codex/actions/runs/24908076251),
[24906197645](https://github.com/openai/codex/actions/runs/24906197645),
and
[24903336028](https://github.com/openai/codex/actions/runs/24903336028).
- `legacy_non_tty_powershell_emits_output` failed in runs
[24908076251](https://github.com/openai/codex/actions/runs/24908076251),
[24906197645](https://github.com/openai/codex/actions/runs/24906197645),
and
[24903336028](https://github.com/openai/codex/actions/runs/24903336028).

These failures were 30s timeouts on Windows x64 and/or arm64 rather than
assertion failures.

## Root Cause

The active legacy Windows sandbox process tests all exercise host-level
resources: sandbox setup, ACL/user state, private desktop process
launch, stdio capture, and PowerShell/cmd child cleanup. Running several
of these tests concurrently can leave them competing for the same
Windows sandbox setup path and process/session resources, which makes
command startup or output collection hang under CI load.

## What Changed

- Added a shared in-process mutex for the active legacy Windows sandbox
process tests.
- Held that guard across each legacy cmd/PowerShell process test so
those host-resource-heavy cases run one at a time.
- Kept the skipped legacy cmd TTY tests unchanged.

## Why This Should Be Reliable

The tests still use unique homes and run the real legacy sandbox process
path, but they no longer overlap the fragile host-level setup and
process/session lifecycle. Serializing just this small group removes the
concurrency race without reducing the behavioral coverage of each test.

## Verification

- `cargo test -p codex-windows-sandbox`
- GitHub Windows CI is the primary validation signal for the affected
tests; on this PR, Windows clippy, Windows release, and Windows local
Bazel passed after the serialization fix.
32aad7bd13 · 2026-04-24 16:18:30 -07:00
5,794 Commits
2026-04-14 01:45:41 +00:00
2025-04-16 12:56:08 -04:00
2025-04-16 12:56:08 -04:00
2026-04-22 11:46:11 +01:00
2026-04-07 10:55:58 -07:00

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