57b5e43d0e
Five bugs identified and patched in retail Asheron's Call client: - v3b: palette refcount over-increment (3-byte NOP at two sites) - v5: RenderSurface PurgeResource no-op stub (vtable slot 2 thunk) - v11: two dangling-pointer crash guards (NULL-check + reorder) - v14: CEnvCell::Destroy ClipPlaneList leak (18-byte JMP to cleanup thunk) - v22: unpacker stale-pointer SEH guard (whole-function __try/__except) All five ship in leakfix.dll (117 KB, SHA d282f23c…) which is loaded by acclient.exe at process start via PE import table patching by tools/install_leakfix.py. Controlled 15-client fleet soak: unpatched control died at 26h with palette exhaustion; all 14 patched clients survived past that point and reached ≥5-day uptime. Residual ~15 MB/h growth traced to d3d9.dll's internal slab allocator (260KB surface backing buffers retained after Release). See REPORT.md §10 for the full investigation; conclusion is that it's unfixable from outside d3d9. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
"""identify_d3d_vtable.py <pid> <candidate_va>
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Read consecutive DWORDs from a candidate vtable address and report how
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many of them are valid d3d9.dll function pointers.
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IDirect3DDevice9 has 119 slots, IDirect3DTexture9 ~17, IDirect3D9 ~16.
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"""
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import ctypes, ctypes.wintypes as wt, sys, struct
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PROCESS_VM_READ = 0x10
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PROCESS_QUERY_INFORMATION = 0x400
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k = ctypes.windll.kernel32
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k.OpenProcess.argtypes = [wt.DWORD, wt.BOOL, wt.DWORD]; k.OpenProcess.restype = wt.HANDLE
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k.ReadProcessMemory.argtypes = [wt.HANDLE, wt.LPCVOID, wt.LPVOID, ctypes.c_size_t, ctypes.POINTER(ctypes.c_size_t)]
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D3D9_BASE = 0x6F4E0000
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D3D9_END = 0x6F4E0000 + 0x17A000
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def rd(h, va, n):
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buf = (ctypes.c_ubyte * n)(); sz = ctypes.c_size_t(0)
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if not k.ReadProcessMemory(h, va, buf, n, ctypes.byref(sz)): return None
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return bytes(buf[:sz.value])
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pid = int(sys.argv[1])
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va = int(sys.argv[2], 0)
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h = k.OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, False, pid)
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if not h: print("OpenProcess fail"); sys.exit(2)
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data = rd(h, va, 4 * 130)
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if not data: print(f"unreadable at 0x{va:08x}"); sys.exit(3)
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# Count consecutive valid d3d9 function pointers
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slot_count = 0
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slots = []
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for i in range(130):
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if i*4 + 4 > len(data): break
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p = struct.unpack_from('<I', data, i*4)[0]
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if D3D9_BASE <= p < D3D9_END:
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slot_count = i + 1 # at least up to here, all valid
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slots.append(p)
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else:
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# First non-d3d9 entry
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slots.append(p)
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if i > 3:
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break
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print(f"Vtable @ 0x{va:08x}: valid d3d9 slots = {slot_count}")
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print(f" Slot 0: 0x{slots[0]:08x}")
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if slot_count > 2: print(f" Slot 2: 0x{slots[2]:08x} (would be IUnknown::Release)")
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if slot_count > 16: print(f" Slot 16: 0x{slots[16]:08x} (could be IDirect3D9::CreateDevice if D3D9 vtable, or IDirect3DDevice9::Reset)")
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if slot_count > 23: print(f" Slot 23: 0x{slots[23]:08x} (would be IDirect3DDevice9::CreateTexture)")
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if slot_count > 28: print(f" Slot 28: 0x{slots[28]:08x} (would be IDirect3DDevice9::CreateRenderTarget)")
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# Identify
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if slot_count >= 119:
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print(f"\n*** LIKELY IDirect3DDevice9 (119 slots expected) ***")
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elif 14 <= slot_count <= 20:
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print(f"\nLIKELY IDirect3D9 or IDirect3DTexture9 (small)")
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elif 4 <= slot_count <= 10:
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print(f"\nLIKELY IUnknown derivative (very small)")
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else:
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print(f"\nUnknown — {slot_count} slots")
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k.CloseHandle(h)
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