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bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for e
From: |
Daniel Colascione |
Subject: |
bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems |
Date: |
Mon, 21 Dec 2015 12:08:46 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 |
On 12/20/2015 08:06 PM, Rich Felker wrote:
> On Sun, Dec 20, 2015 at 10:37:24PM -0500, Ken Brown wrote:
>> On 12/20/2015 5:33 PM, Paul Eggert wrote:
>>> While thinking over this patch I'd like to propose what should be a
>>> simpler approach. This new proposal is more radical, and so should not
>>> be applied to the emacs-25 branch, but it should make the port to musl
>>> etc. automatic.
>>>
>>> The simpler approach is to remove gmalloc.c, and to use the system
>>> memory allocator, i.e., to behave as if SYSTEM_MALLOC is defined on all
>>> platforms.
>>>
>>> We can still support hybrid malloc for Cygwin, if SYSTEM_MALLOC wouldn't
>>> work on Cygwin for some reason; and we can support the similar hybrid on
>>> Darwin, if it's still needed.
>>
>> SYSTEM_MALLOC doesn't work on Cygwin, largely because Cygwin's
>> malloc doesn't support malloc_set_state and malloc_get_state. There
>> may be other problems too. (It's been a while since I tried it.)
>
> I don't see how this is possible; malloc_[gs]et_state do not exist on
> other systems either. Presumably this is some hack needed for the
> dumper, which wouldn't be needed if malloc weren't used pre-dumping.
We really shouldn't be dumping the native heap at all, really.
Eventually, Emacs should be a position-independent executable (as should
every other program), and to unexec a PIE, we need to emit relocations,
and to emit relocations, we need to know where all the pointers are. We
can't do that if the internal heap structure is opaque to us.
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- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, (continued)
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Rich Felker, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Rich Felker, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Rich Felker, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/23
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Ken Brown, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Rich Felker, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Ken Brown, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems,
Daniel Colascione <=
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Rich Felker, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Daniel Colascione, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Eli Zaretskii, 2015/12/20
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Eli Zaretskii, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Wolfgang Jenkner, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Wolfgang Jenkner, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Paul Eggert, 2015/12/21
- bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems, Wolfgang Jenkner, 2015/12/21