ef93a4fa14
Source changes (dormant parity infra, retained from iterate 2.AI/2.AO): - xenia-kernel/exports.rs: nt_create_event manual_reset polarity + related event wiring - xenia-gpu/mmio_region.rs: D1MODE_VBLANK_VLINE_STATUS hardcode parity Also lands the audit-runs/ analysis notes (.md/.txt/.json digests) for the iterate 2.x VSync/0x10e8/0x1004 wedge investigation. Raw trace dumps (.jsonl/.gz/.csv/.stdout) and agent worktrees (.claude/) are gitignored as regenerable local artifacts — see memory + HANDOFF for the running findings. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
77 lines
3.0 KiB
Markdown
77 lines
3.0 KiB
Markdown
# Phase C+7 XamTaskCloseHandle — broad-impact summary
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## Per-chain first-divergence map (pre vs post)
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| chain | pre-fix (C+7 keSetEvent) | post-fix | category |
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|---|---|---|---|
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| tid=6 → 1 (main) | 102158 XamTaskCloseHandle rv=0 vs 1 | **102164 KeResetEvent rv=0 vs 1** | **ADVANCED (+6)** |
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| tid=4 → 11 | — (no divergence in 9-event window) | — | unchanged |
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| tid=7 → 2 | — (no divergence in 29-event window) | — | unchanged |
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| tid=12 → 7 | 2 KeWaitForSingleObject rv=0 vs 258 | 2 (same) | persisted |
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| tid=14 → 9 | 39 RtlEnterCS vs XAudio | 39 (same) | persisted |
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| tid=15 → 10 | — | — | unchanged |
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* Resolved: 1 (XamTaskCloseHandle at 102158)
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* Advanced: 1 (main chain progressed +6 events)
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* Persisted: 2 (KeWait=258 on tid=12→7, XAudio on tid=14→9)
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* NEW: 0 (the new tid=6→1 divergence at idx 102164 is KeResetEvent — same
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class as KeSetEvent already known to be deferred per C+7 memo)
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## XamTaskCloseHandle call-site verification
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Only 1 invocation appears within the 50M Phase A window in both engines:
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| # | tid (c→o) | idx | canary rv | pre-fix ours rv | post-fix ours rv | match? |
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|---|---|---|---|---|---|---|
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| 1 | 6→1 | 102158 | 1 | 0 | **1** | **YES** |
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Both engines emit the same 3-event sequence (`import.call`, `kernel.call`,
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`kernel.return`) at idx 102156-102158 in their respective tids.
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## Handle-table state delta
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Pre-fix: `XamTaskCloseHandle(handle)` was a no-op (stub_success) — handle
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remained in `state.objects` with refcount unchanged. Subsequent reuse of
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the handle value would have aliased to the same Thread object indefinitely.
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Post-fix: `xam_task_close_handle` decrements the per-handle refcount and
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drops the object when it hits 0, mirroring canary's
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`ObjectTable::ReleaseHandle`. No leaks; no double-frees (the function
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short-circuits to return 0 on unknown handle, matching canary's
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`X_STATUS_INVALID_HANDLE` branch).
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## Reading-error class
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No new class. C+7's #28 (canary source-of-truth) was re-applied as
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discipline — and this time the framing held (C+6½'s "calls NtClose,
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returns 1" claim was accurate). Confirms #28 as a routine check, not a
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one-off lesson.
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## Deferred-item interaction check
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NONE triggered. Heap region (C+2), clock (Stage 2), audio host-pump,
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KeSetEvent semantics — all untouched.
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## Cascade outcome
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* A=framing verified: ✅ DONE
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* B=fix landed: ✅ DONE (~158 LOC, 1 file, scope held)
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* C=main chain advances: ✅ DONE (+6)
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* D=clean re-validation: ✅ DONE (all gates pass)
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* E=no escalation needed: ✅ DONE
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## Next target (Phase C+8)
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Main chain (tid=6 → tid=1) at idx **102164**: `KeResetEvent return_value=0 vs 1`.
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Per C+7's memo:
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> `ke_reset_event` left as-is (also returns prior, would mismatch
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> canary's hardcoded `return 1` in `XEvent::Reset` if exercised, but
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> KeResetEvent does not appear in any current Phase A first-divergence
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> — defer).
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Defer is now consumed; KeResetEvent has surfaced. Same fix pattern as C+7
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KeSetEvent: read canary's `XEvent::Reset` body, mirror it, add unit tests.
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~10-20 LOC body fix.
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