crash_on_windows.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

__author__ = "ipetrash"


from ctypes import wintypes, windll, c_void_p, c_size_t, POINTER, c_ubyte, cast


def main():
    # Define constants
    FILE_MAP_ALL_ACCESS = 983071
    PAGE_READWRITE = 4

    # Configure function arguments
    windll.kernel32.CreateFileMappingA.argtypes = [
        wintypes.HANDLE,
        c_void_p,
        wintypes.DWORD,
        wintypes.DWORD,
        wintypes.DWORD,
        wintypes.LPCSTR,
    ]
    windll.kernel32.CreateFileMappingA.restype = wintypes.HANDLE

    windll.kernel32.MapViewOfFile.argtypes = [
        wintypes.HANDLE,
        wintypes.DWORD,
        wintypes.DWORD,
        wintypes.DWORD,
        c_size_t,
    ]
    windll.kernel32.MapViewOfFile.restypes = wintypes.LPVOID

    # Open shared-memory
    handle = windll.kernel32.CreateFileMappingA(
        -1, None, PAGE_READWRITE, 0, 1024 * 1024, b"TestSHMEM"
    )

    # Obtain pointer to SHMEM buffer
    ptr = windll.kernel32.MapViewOfFile(handle, FILE_MAP_ALL_ACCESS, 0, 0, 1024 * 1024)
    arr = cast(ptr, POINTER(c_ubyte))

    print(arr[0])
    # Process finished with exit code -1073741819 (0xC0000005)


if __name__ == "__main__":
    main()