Files
xenia-rs/audit-runs/phase-c5-NtWriteFile/diff-report.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

7.6 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 5 47573 9 5
6 1 102132 329948 108489 102132
7 2 15 29 33 15
12 7 2 6689 3 2
14 9 39 1371603 75 39
15 10 15 863209 15

canary_tid=4 → ours_tid=11

First divergence at tid_event_idx=5: payload.return_value: canary=1 ours=0

Pre-context (last 5 matching events):

  canary: [0] import.call RtlEnterCriticalSection
  ours:   [0] import.call RtlEnterCriticalSection
  canary: [1] kernel.call RtlEnterCriticalSection
  ours:   [1] kernel.call RtlEnterCriticalSection
  canary: [2] kernel.return RtlEnterCriticalSection
  ours:   [2] kernel.return RtlEnterCriticalSection
  canary: [3] import.call KeSetEvent
  ours:   [3] import.call KeSetEvent
  canary: [4] kernel.call KeSetEvent
  ours:   [4] kernel.call KeSetEvent

Divergent event:

  canary: [5] kernel.return KeSetEvent
  ours:   [5] kernel.return KeSetEvent

Next event after the divergence (if any):

  canary: [6] import.call KeWaitForMultipleObjects
  ours:   [6] import.call KeWaitForMultipleObjects

Raw events (JSON):

{"deterministic": true, "engine": "canary", "guest_cycle": 0, "host_ns": 1080594600, "kind": "kernel.return", "payload": {"name": "KeSetEvent", "return_value": 1, "side_effects": [], "status": "0x00000001"}, "schema_version": 1, "tid": 4, "tid_event_idx": 5}
{"deterministic": true, "engine": "ours", "guest_cycle": 33, "host_ns": 1694772531, "kind": "kernel.return", "payload": {"name": "KeSetEvent", "return_value": 0, "side_effects": [], "status": "0x00000000"}, "schema_version": 1, "tid": 11, "tid_event_idx": 5}

canary_tid=6 → ours_tid=1

First divergence at tid_event_idx=102132: payload.ord: canary=207 ours=60

Pre-context (last 5 matching events):

  canary: [102127] kernel.call RtlEnterCriticalSection
  ours:   [102127] kernel.call RtlEnterCriticalSection
  canary: [102128] kernel.return RtlEnterCriticalSection
  ours:   [102128] kernel.return RtlEnterCriticalSection
  canary: [102129] import.call RtlLeaveCriticalSection
  ours:   [102129] import.call RtlLeaveCriticalSection
  canary: [102130] kernel.call RtlLeaveCriticalSection
  ours:   [102130] kernel.call RtlLeaveCriticalSection
  canary: [102131] kernel.return RtlLeaveCriticalSection
  ours:   [102131] kernel.return RtlLeaveCriticalSection

Divergent event:

  canary: [102132] import.call NtClose
  ours:   [102132] import.call IoDismountVolumeByFileHandle

Next event after the divergence (if any):

  canary: [102133] kernel.call NtClose
  ours:   [102133] kernel.call IoDismountVolumeByFileHandle

Raw events (JSON):

{"deterministic": true, "engine": "canary", "guest_cycle": 0, "host_ns": 726307000, "kind": "import.call", "payload": {"module": "xboxkrnl.exe", "name": "NtClose", "ord": 207}, "schema_version": 1, "tid": 6, "tid_event_idx": 102132}
{"deterministic": true, "engine": "ours", "guest_cycle": 5378182, "host_ns": 477341747, "kind": "import.call", "payload": {"module": "xboxkrnl.exe", "name": "IoDismountVolumeByFileHandle", "ord": 60}, "schema_version": 1, "tid": 1, "tid_event_idx": 102132}

canary_tid=7 → ours_tid=2

First divergence at tid_event_idx=15: payload.ord: canary=300 ours=601

Pre-context (last 5 matching events):

  canary: [10] kernel.call NtQueryVolumeInformationFile
  ours:   [10] kernel.call NtQueryVolumeInformationFile
  canary: [11] kernel.return NtQueryVolumeInformationFile
  ours:   [11] kernel.return NtQueryVolumeInformationFile
  canary: [12] import.call RtlInitAnsiString
  ours:   [12] import.call RtlInitAnsiString
  canary: [13] kernel.call RtlInitAnsiString
  ours:   [13] kernel.call RtlInitAnsiString
  canary: [14] kernel.return RtlInitAnsiString
  ours:   [14] kernel.return RtlInitAnsiString

Divergent event:

  canary: [15] import.call RtlInitAnsiString
  ours:   [15] import.call StfsCreateDevice

Next event after the divergence (if any):

  canary: [16] kernel.call RtlInitAnsiString
  ours:   [16] kernel.call StfsCreateDevice

Raw events (JSON):

{"deterministic": true, "engine": "canary", "guest_cycle": 0, "host_ns": 729254300, "kind": "import.call", "payload": {"module": "xboxkrnl.exe", "name": "RtlInitAnsiString", "ord": 300}, "schema_version": 1, "tid": 7, "tid_event_idx": 15}
{"deterministic": true, "engine": "ours", "guest_cycle": 4231, "host_ns": 477679153, "kind": "import.call", "payload": {"module": "xboxkrnl.exe", "name": "StfsCreateDevice", "ord": 601}, "schema_version": 1, "tid": 2, "tid_event_idx": 15}

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": 904485700, "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": 504476955, "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": 1082563200, "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": 1694955205, "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 863209, ours has 15).