> -----Message d'origine----- > De : fpc-pascal-boun...@lists.freepascal.org [mailto:fpc-pascal- > boun...@lists.freepascal.org] De la part de Jonas Maebe > Envoyé : vendredi 5 juin 2015 10:52 > À : FPC-Pascal users discussions > Objet : Re: [fpc-pascal] valgrind: "invalid read" > > > Pierre Free Pascal wrote on Fri, 05 Jun 2015: > > > > I am not sure I understand why it is a false positive: > > > > The read size is 16, at offset 16, which make it read up to position > 32, > > while only 30 byte were allocated... > > What is wrong in my analysis above? > > These kinds of algorithms don't actually use the bytes read past the > end of the data. They will also only read data from aligned addresses, > so that the extra data cannot cross a page boundary and hence cannot > cause a segmentation fault.
OK, thanks for the explanation, it was indeed the page boundary problem I was afraid of. Pierre _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
