[WIP] Audio/threading fixes + crash investigation; NEW ORACLE: crash is ours not the game

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Snapshot for handoff. Contains the mission-audio + threading fixes and the
crash-investigation instrumentation (all diagnostic cvars default-OFF).

Fixes (behavioral):
- threading_posix.cc: reap-once guard on PosixCondition<Thread>::post_execution
  (double pthread_join at mission teardown -> fault loop -> audio death + freeze).
- xma_decoder.cc: work_event_->Set() in Pause() so the idle XMA worker observes
  paused_ and signals pause_fence_ (Pause() deadlock -> permanent audio death).
- audio_system / xma_context_master / xboxkrnl_audio / apu_flags / alsa: mission
  audio keepalive + guest_audio_flags + watchdogs.

Instrumentation (additive, default-off): xboxkrnl_debug cache-throw diag +
guest-catch dispatcher, xex_module PE/PDATA/EH scans, kernel_state mem_watch
(NOTE: mem_watch DEFAULTS TRUE -- an always-on host poll thread; prime crash suspect).

NEW ORACLE (see HANDOFF-crash-oracle-2026-07-16.md): stock 6e5b8324f built with
our toolchain + zero custom code = NO crash, NO sound-stop, plays the Ready Room.
=> the Ready-Room out_of_range crash is introduced by THESE changes, not the game
and not the (LTO-broken) build chain. Bisection plan + suspect ranking in the note.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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This commit is contained in:

MechaCat02

2026-07-16 22:43:50 +02:00

parent 0aa3eadca7

commit 7b6902e08f

20 changed files with 1371 additions and 8 deletions

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third_party/DirectXShaderCompiler vendored

Submodule third_party/DirectXShaderCompiler updated: 69e54e2908...dc3e6c48d4