You are right, so there is no bug for this matter. Thanks.
On Wed, Apr 13, 2011 at 2:26 PM, WAROQUIERS Philippe <
[email protected]> wrote:
> Looking somewhat further, I see that in fact, the replacement of memcpy
> is not broken.
> I find two memcpy: one memcpy is inside ld-linux-x86-64.so.2 (which is
> there very early
> from the start of the process and so the breakpoint was place there),
> and then another memcpy "appears" somewhat later in the execution (in
> libc.so.6).
> This last one is properly replaced by memcheck.
>
> So, the other reason which might explain no errors being reported is that
> gcc replaces a call to memcpy
> by an inline loop.
> In particular, when calling memcpy with a small hardcoded length, I see
> that gcc does not insert
> a call to memcpy but rather effectively does an inline loop.
>
> Compiling with -fno-builtin might also make the overlap error re-appearing.
>
> Note that the memcheck regression test verifying that memcpy overlaps are
> properly detected
> (overlap.vgtest) is failing on my system (due to this "inline loop"
> replacing the call to memcpy).
>
> Philippe
>
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