mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 18:25:35 -04:00
Matthew Stanley
fdbd2b515f
Two distinct bugs were causing OPTIONS-black hard freezes after 12K-65K frames: 1. interrupts.c + traps.c: exception_jmpbuf is a single global. setjmp captures the running fiber, but longjmp may be requested from a different fiber via psx_exception_longjmp / psx_restore_state_escape during chain-handler dispatch. Cross-fiber longjmp restores RSP to the wrong stack while Win32 still tracks the calling fiber, corrupting fiber state until SwitchToFiber eventually hangs. Fix: track g_exception_owner_fiber at setjmp time. New deferred_exception_longjmp checks the current fiber; if it's not the owner, sets a pending flag and SwitchToFiber's back to the owner. psx_change_thread_fiber's post-SwitchToFiber path observes the flag and executes the longjmp on the correct stack. 2. gpu.c: gpu_read_gpustat fired gpu_vblank_tick() after 1000 polls, which invoked sdl_vblank_present (SDL_Delay -> Sleep) from inside an MMIO read code path. That meant recompiled MIPS spent wall time in Sleep deep inside the fiber call tree -- confusing to reason about and a contributor to fiber/longjmp interactions. Fix: synthetic VBLANK from a poll-storm only updates emulation state (LCF + I_STAT). The host-side render+sleep happens only at the proper cycle-paced VBLANK trigger in psx_check_interrupts. Also adds: dirty_block ring slice to the freeze auto-dump, Win32 main- thread stack capture for wedge_kind=1 hard freezes (SuspendThread + StackWalk64 + SymFromAddr), and dbghelp link. Validated: TombaRecomp psx-runtime ran 30+ minutes / 105K+ frames at OPTIONS with no hard freeze. Previous freezes consistently hit at 11900, 20493, and 64596 frames. Diagnostic tooling under tools/_options_session/ that produced this diagnosis is included. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
30 lines
1.1 KiB
Python
30 lines
1.1 KiB
Python
"""Query live thread_trace and see if ChangeTh ping-pong is active now."""
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import sys, json, collections
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sys.path.insert(0, 'F:/Projects/psxrecomp-v4/tools/_options_session')
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import _dbg
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try:
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tt = _dbg.call(4470, "thread_trace", count=512, timeout=4)
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if not tt.get('ok'):
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print(f"err: {tt}")
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sys.exit(1)
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es = tt.get('entries', [])
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print(f"thread_trace: {len(es)} entries (total={tt.get('total')}, available={tt.get('available')})")
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if not es:
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print("(empty)")
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sys.exit(0)
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# Last 20
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print(f"Last 20 (newest first):")
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for e in es[:20]:
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print(f" seq={e.get('seq')} fr={e.get('frame')} kind={e.get('kind')} name={e.get('name')} "
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f"cur={e.get('current_tcb')} tgt={e.get('target_tcb')} pc={e.get('target_pc')}")
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# Pairs of (cur_tcb, target_tcb)
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pairs = collections.Counter((e['current_tcb'], e['target_tcb'], e['name']) for e in es)
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print()
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print("Top transition signatures:")
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for (c,t,n), cnt in pairs.most_common(15):
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print(f" {n}: {c} -> {t}: {cnt}")
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except Exception as e:
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print(f"err: {e}")
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