[Bug tapsets/13455] tapset/nd_syscalls2.stp:# FIXME: should prefer sys_signalfd4

[dsmith at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13455

David Smith <dsmith at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dsmith at redhat dot com
         Depends on|                            |11424

--- Comment #1 from David Smith <dsmith at redhat dot com> 2011-11-30 18:40:38 UTC ---
The reason why it is done this way in syscalls.stp is that in the kernel
sys_signalfd is just a wrapper around sys_signalfd4.  This way we
ignore the sys_signalfd call, and only catch the sys_signalfd4 call on
kernels with sys_signalfd4.

Unfortunately, as bug #11424 notes, '!' (optional and sufficient) doesn't work
for kprobe.function probes.  So, the above logic will be difficult to duplicate
in tapset/nd_syscalls.stp.

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