bug#18222: 24.3.92; fork handlers in gmalloc.c can lead to deadlock

[Eli Zaretskii]

> Date: Mon, 25 Aug 2014 08:28:59 +0900
> From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> Cc: Peter Hull <peterhull90@gmail.com>, 18222@debbugs.gnu.org
> 
> I think it's worth trying also on other platforms that use gmalloc.

The problem is how to write the DUMPED and ALLOCATED_BEFORE_DUMPING
macros.  For Cygwin, they use some intimate knowledge about Cygwin
runtime internals; the question is, do other platforms have similar
facilities and features.

There's also the MinGW way of getting rid of gmalloc, but it needs a
different feature: the ability to specify a user-defined sbrk
function (which MS-Windows supports).