Define and preserve the failure state of kqueue event modifications
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 38/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 活跃
- 技术栈
- rust
调研方向
Start at std/sys/macos/event.wave:69 and review the event-modification flow that deletes existing filters before adding replacements. Coordinate with @LunaStev to agree on whether a failed modification preserves or invalidates the previous watch, since this issue does not approve the semantics. Done means injected delete/add failures verify the chosen watch/token state, callers cannot assume an active registration after loss, and Darwin/FreeBSD native tests confirm the behavior.
由索引模型根据 Issue 内容生成。
描述
Motivation
event_modify deletes existing filters before adding replacements. With successful deletion and an injected add EIO, the real macOS provider returns -5 after the old watch is gone. A Linux-hosted kevent-boundary fixture reproduces this at O0/O2. #783 already fixed ignored deletion errors; this is the later add-failure state.
Starting point: std/sys/macos/event.wave:69.
Validation
Audited canonical Wave 540728c2eb6cc12f5c69c3fb3fdb96e07ba059a4 (0.0.1-alpha-dev), whose tree matches the local checkout. Validation: Executed real macOS provider with controlled kevent boundary on Linux O0/O2; not native Darwin execution. Executed compiler probes use the matching checkout-built compiler and std on Linux amd64 (Rust 1.89.0 / LLVM 21.1.8). Source/header or mocked checks are not native execution on another OS.
Scope
Choose whether failed modification preserves the previous watch or explicitly invalidates it, and make the facade/callers honor that contract. Do not claim an atomic kernel transaction without evidence.
Related: #783. These links do not claim those broader or completed scopes are unfinished.
Design discussion required
This issue records a proposal or an unresolved contract; it is not approval to choose new semantics. Please mention @LunaStev to discuss the design before starting implementation.
Completion criteria
- Inject delete/add partial failures and verify watch/token state.
- Failed modification cannot leave callers assuming an active registration when it was lost.
- Darwin/FreeBSD native regressions confirm the approved recovery behavior.
- 主要语言
- Rust
- 星标
- 56
- 派生
- 21
- 平均合并
- 23 小时 20 分钟
- 30 天内合并 PR
- 45
环境准备
从这里开始
- 先读完整个 Issue，再读项目的贡献指南。
- 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
- Fork 仓库，在一个分支上完成修改。
- 提交 Pull Request，并在描述里引用这个 Issue 编号。
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