SOCKET_CONTEXT / IOCTL_AFD_SET_CONTEXT helper data format is unknown

From timurrrr@google.com on May 30, 2011 04:33:39

On W7 x64 the SizeOfHelperData is 4 and all the bytes after the remote address are initialized (on the issue #421 test).

On XP 32 (and maybe 64-bit too) the SizeOfHelperData is more (104 on 32-bit) and some data in the middle is uninit.

The current comment in drmemory/syscall_windows.c says: /* XXX: helper data could be a struct w/ padding. I have seen pieces of * it be uninit on XP. If see many false positives here should just * disable this until understand its structure. */

xref issue #375

Original issue: http://code.google.com/p/drmemory/issues/detail?id=424