For anyone who's not reading planet (or hasn't read it in the last fifteen minutes ;-) ), I recently landed a new mfbt header that exposes slightly safer versions of memset(.., 0, ...), memcpy, and memcmp for use on C++ types, particularly ones where sizeof(T) > 1.
http://mxr.mozilla.org/mozilla-central/source/mfbt/PodOperations.h The problem is that it's easy to forget to multiply the appropriate parameter in these methods by sizeof(T) when necessary. Doing so can lead to various issues like incompletely-initialized values, issues causing security vulnerabilities in the past. PodOperations.h throws some C++ template methods at the problem, to eliminate the need to remember to add sizeof(T). This stuff's been used by the JS engine for awhile -- I just moved it out of there and to a centralized place for everyone to use. More details here if you want them: http://whereswalden.com/2013/04/26/mozillapodoperations-h-functions-for-zeroing-assigning-to-copying-and-comparing-plain-old-data-objects/ Jeff _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
