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>
105 lines
3.4 KiB
Markdown
105 lines
3.4 KiB
Markdown
# Cold-vs-cold result — Phase C+13 (2026-05-14)
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| canary_tid | ours_tid | matched | first_divergence | event-kind at divergence |
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|---|---|---|---|---|
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| 6 | 1 | **104574** | 104574 | `import.call`: canary=RtlEnterCriticalSection (ord 293) / ours=RtlLeaveCriticalSection (ord 304) — NEW divergence, surfaced by C+13 fix |
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| 4 | 11 | 9 | — | no divergence in 9 events — unchanged from C+12 |
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| 7 | 2 | 29 | — | no divergence in 29 events — unchanged from C+12 |
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| 12 | 7 | 2 | 2 | pre-existing KeWaitForSingleObject TIMEOUT/SUCCESS — unchanged |
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| 14 | 9 | 39 | 39 | pre-existing XAudio init — unchanged |
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| 15 | 10 | 15 | — | no divergence in 15 events — unchanged |
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Main matched-prefix advance: **+712 events** (103,862 → 104,574).
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## New cold digest baseline
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`e1dfcb1559f987b35012a7f2dc6d93f5` (was `ad4f74ee324fdedb0bfdd4cc4c6468e9`).
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Stable-counter delta vs C+12 (digest-cold-stable-1.json):
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```
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instructions: 50000002 → 50000007 (+5)
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imports: 40447 → 40390 (-57)
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unimpl: 0 → 0
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draws: 0 → 0
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swaps: 1 → 1
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unique_render_targets: 0 → 0
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shader_blobs_live: 0 → 0
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texture_cache_entries: 0 → 0
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```
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The `imports` drop is the expected signature of the fix:
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where ours previously synth-empty'd missing disc paths
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(emitting an extra kernel.call/return pair), it now returns
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NOT_FOUND inline. The net `imports` delta (-57) suggests roughly
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~57 missing-disc-file probes per cold boot were previously
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masked.
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## Phase B `image_loaded_sha256`
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`ea8d160e9369328a5b922258a92113efb8d7ce3e1a5c12cc521e375985c91c18`
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(unchanged from C+12 / C+11.1 / C+11 — the engine fix is observation-
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only on the loaded image bytes).
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## Verification of the divergence resolution at idx 103862
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Ours (post-fix) emission at idx 103862:
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```json
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{
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"kind": "kernel.return",
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"tid": 1,
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"tid_event_idx": 103862,
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"payload": {
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"name": "NtCreateFile",
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"return_value": 18446744072635809844,
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"status": "0xc0000034",
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"side_effects": []
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}
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}
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```
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Canary (oracle) emission at idx 103862:
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```json
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{
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"kind": "kernel.return",
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"tid": 6,
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"tid_event_idx": 103862,
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"payload": {
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"name": "NtCreateFile",
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"return_value": 18446744072635809844,
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"status": "0xc0000034",
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"side_effects": []
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}
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}
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```
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Bit-identical match — `STATUS_OBJECT_NAME_NOT_FOUND` (0xC0000034)
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on both sides for the missing `game:\dat\files.tbl` open.
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## New first divergence (next target)
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`tid_event_idx=104574`: ordinal-of-call mismatch in a tight
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`RtlEnterCriticalSection` / `RtlLeaveCriticalSection` sequence.
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Pre-context (last 5 matching events both engines):
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```
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[104569] kernel.call RtlLeaveCriticalSection
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[104570] kernel.return RtlLeaveCriticalSection
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[104571] import.call RtlEnterCriticalSection
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[104572] kernel.call RtlEnterCriticalSection
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[104573] kernel.return RtlEnterCriticalSection
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```
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Divergent event:
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```
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canary: [104574] import.call RtlEnterCriticalSection
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ours: [104574] import.call RtlLeaveCriticalSection
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```
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Reading: canary does **two** sequential `RtlEnterCriticalSection`
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calls (nested-lock pattern around the NOT_FOUND error-handling
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path); ours does **one** Enter followed by a Leave (single-lock
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pattern). This is downstream code branching differently — likely
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an error-handling path in the boot validator that takes a
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double-lock when a disc lookup misses. Investigate the function
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on whose path Sylpheed is at `pc` 104574 in ours.
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