|Bill Allombert on Mon, 7 Apr 2003 23:50:51 +0200|
[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]
|Re: GMP kernel and stack abuse|
On Mon, Apr 07, 2003 at 02:14:39PM -0700, Ilya Zakharevich wrote: > On Mon, Apr 07, 2003 at 12:24:02PM +0200, Bill Allombert wrote: > > I think it is in the FAQ: > > In my experience, it is easier to fix such problems than again and > again point to faq. Since this bug occurs on all program I know that use GMP, I suspect it is not easy to fix. > > Using the GMP kernel, my session dies on a huge division! > > > > This is a general problem in GMP, which may allocate a huge amount of > > memory in the process stack space (using alloca). The best solution so far > > is to increase the maximum size of the process stack segment before > > starting gp from the shell. Alternatively, you might wish to configure GMP > > with > > > > configure --enable-alloca=malloc-noreentrant > > > > but this will slow down GMP. > > We *know* the stack limit. Why not use this knowledge to substitute > our alloca()? Does not it require recompiling libgmp ? The stack overflow here is of the order of tens of megabytes. Cheers, Bill.