Curtis 'Fjord' Hawthorne 0d76d029b7 Fix js_repl in-flight tool-call waiter race (#11800)
## Summary

This PR fixes a race in `js_repl` tool-call draining that could leave an
exec waiting indefinitely for in-flight tool calls to finish.

The fix is in:

-
`/Users/fjord/code/codex-jsrepl-seq/codex-rs/core/src/tools/js_repl/mod.rs`

## Problem

`js_repl` tracks in-flight tool calls per exec and waits for them to
drain on completion/timeout/cancel paths.
The previous wait logic used a check-then-wait pattern with `Notify`
that could miss a wakeup:

1. Observe `in_flight > 0`
2. Drop lock
3. Register wait (`notified().await`)

If `notify_waiters()` happened between (2) and (3), the waiter could
sleep until another notification that never comes.

## What changed

- Updated all exec-tool-call wait loops to create an owned notification
future while holding the lock:
- use `Arc<Notify>::notified_owned()` instead of cloning notify and
awaiting later.
- Applied this consistently to:
  - `wait_for_exec_tool_calls`
  - `wait_for_all_exec_tool_calls`
  - `wait_for_exec_tool_calls_map`

This preserves existing behavior while eliminating the lost-wakeup
window.

## Test coverage

Added a regression test:

- `wait_for_exec_tool_calls_map_drains_inflight_calls_without_hanging`

The test repeatedly races waiter/finisher tasks and asserts bounded
completion to catch hangs.

## Impact

- No API changes.
- No user-facing behavior changes intended.
- Improves reliability of exec lifecycle boundaries when tool calls are
still in flight.


#### [git stack](https://github.com/magus/git-stack-cli)
-  `1` https://github.com/openai/codex/pull/11796
- 👉 `2` https://github.com/openai/codex/pull/11800
-  `3` https://github.com/openai/codex/pull/10673
-  `4` https://github.com/openai/codex/pull/10670
0d76d029b7 · 2026-02-14 01:24:52 +00:00
3,722 Commits
2026-01-08 07:50:58 -08:00
2025-04-16 12:56:08 -04:00
2026-02-06 14:41:53 +01:00
2025-04-16 12:56:08 -04:00
2026-01-31 20:33:06 +00:00

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