https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
Markus Trippelsdorf trippels at gcc dot gnu.org changed:
What|Removed |Added
Status|UNCONFIRMED |WAITING
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #2 from gpnuma at centaurean dot com ---
I understand you're short of time but this problem is very difficult to
reproduce !!
I did try to compile and link with -fsanitize=undefined this morning, now
here's the interesting part :
*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #3 from Markus Trippelsdorf trippels at gcc dot gnu.org ---
Another thing you might try is to use: -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations (as per http://gcc.gnu.org/bugs/)
and see if the issue goes away, too.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #10 from Markus Trippelsdorf trippels at gcc dot gnu.org ---
(In reply to gpnuma from comment #8)
Thanks Markus I didn't think these alignment issues were actually the
problem, it goes a long way.
By doing memmoves instead of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #5 from gpnuma at centaurean dot com ---
Ok I did just try -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations and the issue is still there.
If I add the printf(something); at the top of the function, everything works
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
Markus Trippelsdorf trippels at gcc dot gnu.org changed:
What|Removed |Added
Status|WAITING
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #9 from gpnuma at centaurean dot com ---
What I mean is the structs I was using the pointer casts allocations with are
instanciated by the program itself, so there could be a way to instanciate them
with the required alignment I
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #4 from gpnuma at centaurean dot com ---
Sorry I meant gcc 4.9.2 / -O3 of course, 4.8 works fine.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #7 from Markus Trippelsdorf trippels at gcc dot gnu.org ---
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65709 for a similar bug
in LZ4.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #8 from gpnuma at centaurean dot com ---
Thanks Markus I didn't think these alignment issues were actually the problem,
it goes a long way.
By doing memmoves instead of pointer cast allocations I got rid of the
segfault, but of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230
--- Comment #11 from gpnuma at centaurean dot com ---
(In reply to Markus Trippelsdorf from comment #10)
(In reply to gpnuma from comment #8)
Thanks Markus I didn't think these alignment issues were actually the
problem, it goes a long way.
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