From: Ulrich Mueller <ulm@gentoo.org>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: emacs-devel@gnu.org
Subject: Re: Size of emacs.pdmp changes between successive installs
Date: Wed, 20 Nov 2019 00:21:45 +0100 [thread overview]
Message-ID: <w6geey3laeu.fsf@kph.uni-mainz.de> (raw)
In-Reply-To: <871ru34tq0.fsf@igel.home> (Andreas Schwab's message of "Tue, 19 Nov 2019 19:16:39 +0100")
>>>>> On Tue, 19 Nov 2019, Andreas Schwab wrote:
> On Nov 19 2019, Ulrich Mueller wrote:
>> For two successive installs from a clean checkout of the same git
>> commit, emacs.pdmp ends up having slightly different size:
>>
>> $ stat -c %s /usr/libexec/emacs/27.0.50/x86_64-pc-linux-gnu/emacs.pdmp
>> 10563744
>>
>> $ stat -c %s /usr/libexec/emacs/27.0.50/x86_64-pc-linux-gnu/emacs.pdmp
>> 10563728
>>
>> Why is that so? Shouldn't it be deterministic?
> Try disabling ASLR. That doesn't make it completely reproducible,
> though.
Indeed. After doing "echo -n 0 >/proc/sys/kernel/randomize_va_space"
I get at least the same size every time.
This is with Linux 4.14.154 and glibc 2.30.
prev parent reply other threads:[~2019-11-19 23:21 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-19 16:59 Size of emacs.pdmp changes between successive installs Ulrich Mueller
2019-11-19 17:18 ` Paul Eggert
2019-11-19 17:45 ` Eli Zaretskii
2019-11-19 18:19 ` Andreas Schwab
2019-11-19 18:16 ` Andreas Schwab
2019-11-19 20:56 ` Paul Eggert
2019-11-19 22:14 ` Andreas Schwab
2019-11-19 23:45 ` Ulrich Mueller
2019-11-20 2:27 ` Paul Eggert
2019-11-20 11:55 ` Andreas Schwab
2019-11-20 19:54 ` Paul Eggert
2019-11-20 19:59 ` Paul Eggert
2019-11-20 9:29 ` Andreas Schwab
2019-11-20 11:42 ` Ulrich Mueller
2019-11-19 23:21 ` Ulrich Mueller [this message]
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