Patch: support callback on allocation overflow instead of calling abort()

[Vincent Lefevre]

On 2020-10-06 11:51:29 +0200, Marc Glisse wrote:
> On Tue, 6 Oct 2020, Vincent Lefevre wrote:
> 
> > On 2020-10-06 04:41:42 +0100, Colin Caine wrote:
> > > This is used by Julia to raise an OutOfMemory exception rather than having
> > > the Julia process itself abort.
> > > 
> > > Others on stackoverflow, etc, have experienced similar problems with
> > > undesired aborts(), so this patch would probably be useful to a variety of
> > > users. (see:
> > > https://github.com/JuliaLang/julia/issues/8286#issuecomment-323500953)
> > > 
> > > More information is available here and in the linked issues and PRs:
> > > https://github.com/JuliaLang/julia/pull/31215
> > 
> > Since the function could have allocated memory for intermediate
> > computations, how do you avoid memory leaks?
> 
> You would need something like
> 
> https://gmplib.org/list-archives/gmp-devel/2014-December/003868.html

But this is only for C++ and only for temporary memory (while
normal allocation seems to be sometimes used, like in mpz/mul.c
with "wp = __GMP_ALLOCATE_FUNC_LIMBS (wsize);").

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