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>
14 lines
577 B
Python
14 lines
577 B
Python
import sys
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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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addr = int(sys.argv[1], 16)
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size = int(sys.argv[2], 0) if len(sys.argv) > 2 else 0x200
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r = _dbg.call(4470, 'read_ram', addr=f'0x{addr:08X}', len=size, timeout=4)
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b = bytes.fromhex(r['hex'])
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print(f"Contents of 0x{addr:08X} ({size} bytes):")
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for i in range(0, len(b), 32):
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line = ' '.join(f'{x:02x}' for x in b[i:i+32])
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non_zero = sum(1 for x in b[i:i+32] if x != 0)
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marker = "" if non_zero == 0 else f" ({non_zero}/32 non-zero)"
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print(f" +0x{i:03X}: {line}{marker}")
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