Re: Bug #13587 Updated: Recurence makes crash

On Mon, 8 Oct 2001, Markus Fischer wrote: > On Mon, Oct 08, 2001 at 11:05:21AM +0200, Jeroen van Wolffelaar wrote : > > There's a solution which is easy to mention but requires some > > work to implement. Don't implement function calls by means of function > > calls... The PHP processes stack will then not be based on the script, > > and thus not overflow. I cannot oversee how hard it is to implement, > > chances are it involves a change of approach in zend_execute... > > But wouldn't this step be *awfully* slow? I can't tell yet, but I don't see why. I think no change of approach is needed. Now a function call happens like this: create hash for function-scope call that function (inside function) function call: create hash for function-scope call that function (inside function, etc) assign return value assign return value A different approach which only changes the way userland functions are called: create hash for function push on the execution stack JUMP to the beginning of that function (etc, for recursive calls, you remain at this level) at function end, pop from execution stack and JUMP to appropriate place. read return value This is terribly simplified and therefore also quite wrong in every detail, but I believe it does cover the idea. I'm not sure though, it's not easy to oversee the code. > > - Markus > > Jeroen van Wolffelaar Jeroen@A-Eskwadraat.nl http://www.A-Eskwadraat.nl/~jeroen