mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-28 19:07:47 -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>
34 lines
1.0 KiB
Python
34 lines
1.0 KiB
Python
"""Search for any writes to the polled flag region 0xB9D0..0xB9E4."""
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import json, sys
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path = sys.argv[1] if len(sys.argv) > 1 else \
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'F:/Projects/TombaRecomp/psx_freeze_dump_psx-runtime_1778800465.json'
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with open(path) as f:
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d = json.load(f)
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LO = 0xB9C0
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HI = 0xB9F0
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hits = []
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for e in d['wtrace_all']:
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a = int(e['addr'], 16)
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if LO <= a < HI:
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hits.append(e)
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print(f'Writes in [{hex(LO)}..{hex(HI)}): {len(hits)} of {len(d["wtrace_all"])} total')
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for e in hits[:30]:
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print(f' seq={e["seq"]} addr={e["addr"]} new={e["new"]} pc={e["pc"]} ra={e["ra"]} frame={e["frame"]}')
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# Also check broader kernel-data scan to find what IS being written nearby
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print()
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print('--- broader scan 0xB000..0xC800 ---')
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addr_c = {}
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for e in d['wtrace_all']:
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a = int(e['addr'], 16)
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if 0xB000 <= a < 0xC800:
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addr_c[e['addr']] = addr_c.get(e['addr'], 0) + 1
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print(f'Total in 0xB000..0xC800: {sum(addr_c.values())}')
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for a, c in sorted(addr_c.items(), key=lambda x: -x[1])[:20]:
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print(f' {a}: {c}')
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