mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-27 18:52:11 -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>
23 lines
879 B
Python
23 lines
879 B
Python
import json, sys
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dump = sys.argv[1] if len(sys.argv) > 1 else \
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'F:/Projects/TombaRecomp/psx_freeze_dump_psx-runtime_1778822828.json'
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with open(dump) as f:
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d = json.load(f)
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fe = d['fn_entry']
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print(f'fn_entry count: {len(fe)}')
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print(f'Last 40 entries:')
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for e in fe[-40:]:
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print(f' seq={e["seq"]} fr={e["frame"]} func={e["func"]} ra={e["ra"]} '
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f'a0={e.get("a0","?")} a1={e.get("a1","?")} t1={e.get("t1","?")}')
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print()
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print(f'Last 30 wtrace_all entries:')
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for e in d['wtrace_all'][-30:]:
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print(f' seq={e["seq"]} fr={e["frame"]} pc={e["pc"]} addr={e["addr"]} ->{e.get("new","?")}')
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print()
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print(f'Last 20 restore_trace entries:')
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for e in d['restore_trace'][-20:]:
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print(f' seq={e["seq"]} fr={e["frame"]} kind={e["kind"]} name={e.get("name","?")} '
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f'target={e["target"]} cpu_pc={e["cpu_pc"]} epc={e["epc"]} in_exc={e["in_exc"]}')
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