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| author | Torbjorn Granlund <tege@gmplib.org> | 2011-04-28 21:14:58 +0200 |
|---|---|---|
| committer | Torbjorn Granlund <tege@gmplib.org> | 2011-04-28 21:14:58 +0200 |
| commit | 170630e8577dc2df1a9f0ede09fa874c805c4a6b (patch) | |
| tree | b5e76829619529ee05aee14a8a6f7e419f58c718 /doc/gmp.texi | |
| parent | 3d76d4643bf048a9b9f6062eff63e889bd669491 (diff) | |
| download | gmp-170630e8577dc2df1a9f0ede09fa874c805c4a6b.tar.gz | |
Mention benign out-of-bounds read in Valgrind context.
Diffstat (limited to 'doc/gmp.texi')
| -rw-r--r-- | doc/gmp.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/gmp.texi b/doc/gmp.texi index 425e69578..67fb5c4ac 100644 --- a/doc/gmp.texi +++ b/doc/gmp.texi @@ -2657,6 +2657,11 @@ Recent versions of Valgrind are getting support for MMX and SSE/SSE2 instructions, for past versions GMP will need to be configured not to use those, ie.@: for an x86 without them (for instance plain @samp{i486}). +GMP's assembly code sometimes promotes a read of the limbs to some larger size, +for efficiency. GMP will do this even at the start and end of a multilimb +operand, using naturaly aligned operations on the larger type. This may lead +to benign reads outside of allocated areas, triggering complants from Valgrind. + @item Other Problems Any suspected bug in GMP itself should be isolated to make sure it's not an application problem, see @ref{Reporting Bugs}. |