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Re: [PATCH] valgrind: ignore SSE-based strlen invalid reads

From
Jonathan Nieder <jrnieder@gmail.com>
Date
Mar 16, 2011, 09:56 UTC
Message-ID
<20110316095632.GA8277@elie>
In-Reply-To
<1300267874-15365-1-git-send-email-cmn@elego.de>
Hi Carlos,
Carlos Martín Nieto wrote:
Show 5 quoted lines
> The C library uses SSE instructions to make strlen (among others)
> faster, loading 4 bytes at a time and reading past the end of the
> allocated memory. This read is safe and when the strlen function is
> inlined, it is (obviously) not replaced by valgrind, which reports a
> false-possitive.

It would be GCC rather than the C library if the strlen is inlined, I think. Is this a distinct bug from <http://bugs.kde.org/show_bug.cgi?id=266961>? Has it been filed with the valgrind maintainers?

Thanks, Jonathan

Previous: Carlos Martín NietoNext: Carlos Martín Nieto
Message 2 of 11 in “valgrind: ignore SSE-based strlen invalid reads”
  1. valgrind: ignore SSE-based strlen invalid readsCarlos Martín Nieto, Mar 16, 2011
  2. Jonathan NiederMar 16, 2011
  3. Carlos Martín NietoMar 16, 2011
  4. valgrind: ignore SSE-based strlen invalid readsCarlos Martín Nieto, Mar 16, 2011
  5. Jonathan NiederMar 16, 2011
  6. Carlos Martín NietoMar 16, 2011
  7. Jonathan NiederMar 16, 2011
  8. valgrind: ignore SSE-based strlen invalid readsCarlos Martín Nieto, Mar 16, 2011
  9. Junio C HamanoMar 16, 2011
  10. Carlos Martín NietoMar 16, 2011
  11. Andreas SchwabMar 16, 2011

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