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>
59 lines
2.5 KiB
Python
59 lines
2.5 KiB
Python
"""peek_first_region.py <pid> <exact_size_bytes>
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Find the first private-RW region of exactly <size>, dump its first 256 bytes
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plus a sample at offset 4096 and at midpoint."""
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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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k.ReadProcessMemory.restype = wt.BOOL
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k.VirtualQueryEx.argtypes = [wt.HANDLE, wt.LPCVOID, ctypes.c_void_p, ctypes.c_size_t]
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k.VirtualQueryEx.restype = ctypes.c_size_t
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class MBI(ctypes.Structure):
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_fields_ = [("BaseAddress", ctypes.c_void_p), ("AllocationBase", ctypes.c_void_p),
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("AllocationProtect", wt.DWORD), ("RegionSize", ctypes.c_size_t),
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("State", wt.DWORD), ("Protect", wt.DWORD), ("Type", wt.DWORD)]
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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]); target_size = int(sys.argv[2])
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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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mbi = MBI()
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addr = 0
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found = 0
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while k.VirtualQueryEx(h, addr, ctypes.byref(mbi), ctypes.sizeof(mbi)) and found < 3:
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base = mbi.BaseAddress or 0
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sz = mbi.RegionSize
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if (mbi.State == 0x1000 and mbi.Type == 0x20000 and (mbi.Protect & 0xFF) in (0x04, 0x40)
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and sz == target_size):
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print(f"\n=== region @ 0x{base:08x} size={sz} ===")
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for off in [0, 256, 4096, sz // 2, sz - 64]:
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data = rd(h, base + off, 64)
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if data:
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print(f" +0x{off:06x}: {data[:32].hex(' ')}")
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print(f" {data[32:64].hex(' ')}")
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# Interpret first 32 bytes as DWORDs and floats
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data = rd(h, base, 32)
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if data:
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print(f" as DWORDs: ", end='')
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for i in range(0, 32, 4):
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print(f"0x{struct.unpack_from('<I', data, i)[0]:08x}", end=' ')
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print()
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print(f" as floats: ", end='')
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for i in range(0, 32, 4):
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print(f"{struct.unpack_from('<f', data, i)[0]:.3g}", end=' ')
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print()
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found += 1
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next_addr = base + sz
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if next_addr <= addr: break
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addr = next_addr
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if addr >= 0x80000000: break
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k.CloseHandle(h)
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