Files
xenia-rs/audit-runs/phase-c12-NtQueryFullAttributesFile/diff-cold-vs-cold.md
MechaCat02 ef93a4fa14 handoff: VSync/event-wedge fixes + iterate 2.A–2.BC research notes
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>
2026-06-05 07:19:08 +02:00

5.0 KiB

Phase A diff report

This report is the output of Phase A's diff harness. Divergences shown here are INPUT for Phase B (first-divergence localization), not findings of Phase A. Phase A's job is to make the harness itself correct, not to analyze what it surfaces.

Summary

canary_tid ours_tid matched canary_total ours_total first_divergence_at
4 11 9 20000 9
6 1 103862 250000 108471 103862
7 2 29 29 30
12 7 2 10532 3 2
14 9 39 20000 75 39
15 10 15 20000 15

canary_tid=4 → ours_tid=11

No divergence within the 9 compared events (canary has 20000, ours has 9).

canary_tid=6 → ours_tid=1

First divergence at tid_event_idx=103862: payload.return_value: canary=18446744072635809844 ours=0

Pre-context (last 5 matching events):

  canary: [103857] import.call RtlInitAnsiString
  ours:   [103857] import.call RtlInitAnsiString
  canary: [103858] kernel.call RtlInitAnsiString
  ours:   [103858] kernel.call RtlInitAnsiString
  canary: [103859] kernel.return RtlInitAnsiString
  ours:   [103859] kernel.return RtlInitAnsiString
  canary: [103860] import.call NtCreateFile
  ours:   [103860] import.call NtCreateFile
  canary: [103861] kernel.call NtCreateFile
  ours:   [103861] kernel.call NtCreateFile

Divergent event:

  canary: [103862] kernel.return NtCreateFile
  ours:   [103862] kernel.return NtCreateFile

Next event after the divergence (if any):

  canary: [103863] import.call RtlNtStatusToDosError
  ours:   [103863] import.call RtlEnterCriticalSection

Raw events (JSON):

{"deterministic": true, "engine": "canary", "guest_cycle": 0, "host_ns": 805501600, "kind": "kernel.return", "payload": {"name": "NtCreateFile", "return_value": 18446744072635809844, "side_effects": [], "status": "0xc0000034"}, "schema_version": 1, "tid": 6, "tid_event_idx": 103862}
{"deterministic": true, "engine": "ours", "guest_cycle": 5470532, "host_ns": 463681670, "kind": "kernel.return", "payload": {"name": "NtCreateFile", "return_value": 0, "side_effects": [], "status": "0x00000000"}, "schema_version": 1, "tid": 1, "tid_event_idx": 103862}

canary_tid=7 → ours_tid=2

No divergence within the 29 compared events (canary has 29, ours has 30).

canary_tid=12 → ours_tid=7

First divergence at tid_event_idx=2: payload.return_value: canary=258 ours=0

Pre-context (last 5 matching events):

  canary: [0] import.call KeWaitForSingleObject
  ours:   [0] import.call KeWaitForSingleObject
  canary: [1] kernel.call KeWaitForSingleObject
  ours:   [1] kernel.call KeWaitForSingleObject

Divergent event:

  canary: [2] kernel.return KeWaitForSingleObject
  ours:   [2] kernel.return KeWaitForSingleObject

Next event after the divergence (if any):

  canary: [3] import.call RtlEnterCriticalSection
  ours:   <end of stream>

Raw events (JSON):

{"deterministic": true, "engine": "canary", "guest_cycle": 0, "host_ns": 935048400, "kind": "kernel.return", "payload": {"name": "KeWaitForSingleObject", "return_value": 258, "side_effects": [], "status": "0x00000102"}, "schema_version": 1, "tid": 12, "tid_event_idx": 2}
{"deterministic": true, "engine": "ours", "guest_cycle": 30, "host_ns": 479443976, "kind": "kernel.return", "payload": {"name": "KeWaitForSingleObject", "return_value": 0, "side_effects": [], "status": "0x00000000"}, "schema_version": 1, "tid": 7, "tid_event_idx": 2}

canary_tid=14 → ours_tid=9

First divergence at tid_event_idx=39: payload.ord: canary=503 ours=293

Pre-context (last 5 matching events):

  canary: [34] kernel.call KeReleaseSpinLockFromRaisedIrql
  ours:   [34] kernel.call KeReleaseSpinLockFromRaisedIrql
  canary: [35] kernel.return KeReleaseSpinLockFromRaisedIrql
  ours:   [35] kernel.return KeReleaseSpinLockFromRaisedIrql
  canary: [36] import.call KfLowerIrql
  ours:   [36] import.call KfLowerIrql
  canary: [37] kernel.call KfLowerIrql
  ours:   [37] kernel.call KfLowerIrql
  canary: [38] kernel.return KfLowerIrql
  ours:   [38] kernel.return KfLowerIrql

Divergent event:

  canary: [39] import.call XAudioGetVoiceCategoryVolumeChangeMask
  ours:   [39] import.call RtlEnterCriticalSection

Next event after the divergence (if any):

  canary: [40] kernel.call XAudioGetVoiceCategoryVolumeChangeMask
  ours:   [40] kernel.call RtlEnterCriticalSection

Raw events (JSON):

{"deterministic": true, "engine": "canary", "guest_cycle": 0, "host_ns": 1106484200, "kind": "import.call", "payload": {"module": "xboxkrnl.exe", "name": "XAudioGetVoiceCategoryVolumeChangeMask", "ord": 503}, "schema_version": 1, "tid": 14, "tid_event_idx": 39}
{"deterministic": true, "engine": "ours", "guest_cycle": 417, "host_ns": 1658972624, "kind": "import.call", "payload": {"module": "xboxkrnl.exe", "name": "RtlEnterCriticalSection", "ord": 293}, "schema_version": 1, "tid": 9, "tid_event_idx": 39}

canary_tid=15 → ours_tid=10

No divergence within the 15 compared events (canary has 20000, ours has 15).