[PATCH] malloc: Remove dumped heap support

[Sam James]

> On 17 Sep 2025, at 07:05, Florian Weimer <fweimer@redhat.com> wrote:
> 
> * Adhemerval Zanella Netto:
> 
>>> On 16/09/25 16:14, Florian Weimer wrote:
>>> * Adhemerval Zanella Netto:
>>> 
>>>> Right, but from Florian's comment the emacs configure checks for
>>>> Doug Lea malloc style will always return false.  And afaik the
>>>> heap dump support is an startup optimization, so not really
>>>> required to run old emacs binaries.
>>> 
>>> No, it is required to run old Emacs binaries.  It is also quite
>>> difficult to run old Emacs without dumping first.  The temacs binary is
>>> not not fully-featured.  But this is rather old history by this point.
>>> 
>>> I still think if people want to run these old Emacs binaries, they can
>>> build their own out-of-tree malloc with suitable heap rewriting.
>> 
>> Right, but does current dumped heap support work with old Emacs binaries
>> or does we need extra hacks to make it happen?
> 
> The heap rewriting is only part of libc_malloc_debug.so.0, so there is
> already an extra step.

I withdraw my objection then. Thanks!

> 
> Thanks,
> Florian
>