mirror of https://github.com/garrytan/gstack.git
bbaf5068b0
Three-bug chain behind the Windows terminal-agent leak (console window strobing every 60s, one orphaned agent per watchdog tick until the box ran out of committable memory): 1. isProcessAlive shelled out to `tasklist /FI "PID eq <pid>"` on Windows with a 3s timeout. A Bun.spawnSync that hits its timeout still RETURNS with partial stdout, so the `.includes()` PID match read a LIVE agent as dead — killAgentByRecord skipped the kill, the watchdog respawned around the survivor, and every orphan slowed the next tasklist enough to produce the next false negative. Now: `process.kill(pid, 0)` on every platform (Node and Bun both map signal 0 to an OpenProcess existence check on Windows), with EPERM counted as alive. No subprocess, no timeout, no console window. 2. The respawn circuit-breaker was mathematically unreachable — verified in this tree: RESPAWN_GUARD_WINDOW_MS was a fixed 60_000 against a 60_000ms default tick, and each tick pushes at most one respawn timestamp, so three pushes span ~120s and can never coexist inside a 60s window (eviction is strict `>`, and setInterval drift plus per-tick work always ages the prior entry past the boundary). The guard could not fire at the default tick rate and a steady one-per-tick leak ran unbounded. The window now scales with the tick: max(60_000, tick * (RESPAWN_GUARD_MAX + 2)), so "3 crashes in quick succession → stop" holds at any tick value. 3. The tasklist probe popped a visible console per tick (no windowsHide). Removing the shell-out kills that site; the agent-spawn site itself already passes windowsHide: true (landed with the bun-polyfill windowsHide commit — PR #2414's terminal-agent-control.ts hunk is reconciled there rather than duplicated). New browse/test/process-liveness-windows.test.ts pins all three: no subprocess from the probe, a static tripwire against reintroducing `tasklist` + `PID eq` liveness checks in src/, the spawnTerminalAgent windowsHide + stdio contract, and the window-derived-from-tick arithmetic. terminal-agent-watchdog.test.ts test 4 now pins the window/tick relationship instead of the fixed literal that let this ship. Also converts `new URL(import.meta.url).pathname` to `import.meta.path` across the static-grep tests it touches — the pathname form yields /C:/... on Windows and breaks path.resolve. Contributed by @SYKhayyat (PR #2414). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> |
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