Re: Apache 2 support

On Sat, 28 Jun 2003, Dmitri Dmitrienko wrote: > > We could of course mutex every call to every external function. Then we > > could be reasonably sure it would work, and at the same time we could be > > sure that it was much slower than running it non-threaded. > > Any crash in an area protected by mutex would leave this mutex in > non-released state and all the rest threads trying to access that area would > be blocked forever. A crash in a multi-threaded program most likely leads to the termination of the process, so this is a non-issue. > BTW, is there any way for checking if a library does not create nor use any > global variables ? May be just running nm with non-stripped .so objects and > inspecting the resulting list ? Any other ideas ? nm displays global variables, including static function-scope variables. However, you cannot discern whether their use is save unless you audit the source code. The latter is also necessary, because a function can rely on external non-reentrant functions which renders the caller itself non-reentrant. - Sascha