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>
33 lines
1.8 KiB
Python
33 lines
1.8 KiB
Python
"""peek_addr.py <pid> <va> [n=16]
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Read n bytes at va from a live process. Print as hex + try to interpret prologue."""
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import ctypes, ctypes.wintypes as wt, sys
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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.CloseHandle.argtypes = [wt.HANDLE]; k.CloseHandle.restype = wt.BOOL
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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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pid = int(sys.argv[1]); va = int(sys.argv[2], 0); n = int(sys.argv[3]) if len(sys.argv) > 3 else 16
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h = k.OpenProcess(PROCESS_VM_READ|PROCESS_QUERY_INFORMATION, False, pid)
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if not h: print(f"OpenProcess err={ctypes.get_last_error()}"); sys.exit(2)
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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)):
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print(f"ReadProcessMemory @ 0x{va:08x} err={ctypes.get_last_error()}"); sys.exit(3)
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data = bytes(buf[:sz.value])
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print(f"@ 0x{va:08x}: {data.hex(' ')}")
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# rough heuristics
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hints = []
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if data[:1] == b'\x55': hints.append("push ebp (typical prologue)")
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if data[:1] == b'\x56': hints.append("push esi (thiscall this->esi prologue)")
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if data[:1] == b'\x53': hints.append("push ebx (prologue start)")
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if data[:1] == b'\x8b': hints.append("mov reg, ... (could be prologue or middle)")
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if data[:1] == b'\x83': hints.append("sub/add esp, imm8 (stack alloc, prologue)")
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if data[:3] == b'\xb0\x01\xc3': hints.append("mov al,1; ret (no-op stub)")
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if data[:3] == b'\xb0\x00\xc3': hints.append("mov al,0; ret")
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if data[:1] == b'\xc3': hints.append("bare ret")
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if data[:2] == b'\x90\x90': hints.append("NOP pad (real code likely after)")
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if hints: print(" -> " + "; ".join(hints))
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k.CloseHandle(h)
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