mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 10:19:47 -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>
17 lines
641 B
Python
17 lines
641 B
Python
"""Are card1.mcd frames 1..15 byte-identical? If yes, the 'frame 1' label
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in _card_bytes2.py output may actually be frames 1, 2, 3, 4 etc.
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Print full hex for each first-byte-differing pair."""
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with open('F:/Projects/TombaRecomp/saves/card1.mcd', 'rb') as fh:
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card = fh.read()
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f1 = card[128:256]
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for fr in range(0, 16):
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fb = card[fr*128:(fr+1)*128]
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# diff vs f1
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diffs = [(i, f1[i], fb[i]) for i in range(128) if f1[i] != fb[i]]
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if diffs:
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diff_str = ', '.join(f'@{i}(f1={a:02X},f{fr}={b:02X})' for i, a, b in diffs[:6])
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else:
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diff_str = '(IDENTICAL to frame 1)'
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print(f"Frame {fr:2d}: {diff_str}")
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