[issue12181] SIGBUS error on OpenBSD (sparc64)
Charles-François Natali
report at bugs.python.org
Thu May 26 19:47:43 CEST 2011
Charles-François Natali <neologix at free.fr> added the comment:
> ident and data are not pointers,
That's not the point.
struct kevent declaration should be the following:
struct kevent {
uintptr_t ident; /* identifier for this event */
short filter; /* filter for event */
u_short flags; /* action flags for kqueue */
u_int fflags; /* filter flag value */
intptr_t data; /* filter data value */
void *udata; /* opaque user data identifier */
};
If this doesn't match, you'll unpack garbage when extracting members,
and since it's an unaligned access, you can even get a SIGBUS (looks
like sparc64 doesn't allow unaligned access).
> I suppose that T_UINT and T_INT should be used instead of T_UINTPTR_T and T_INTPTR_T.
Yes, we could do that on OpenBSD, but that's definitely an OpenBSD bug.
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