From: Noam Postavsky <npostavs@users.sourceforge.net>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Gergely Czuczy <gergely.czuczy@harmless.hu>, 28308@debbugs.gnu.org
Subject: bug#28308: Build failure on FreeBSD/aarch64
Date: Tue, 24 Oct 2017 14:43:09 -0400 [thread overview]
Message-ID: <CAM-tV--7NYCG6RGsyckHLFumAjt46krBc1pMqF0c2RbUYcmFGg@mail.gmail.com> (raw)
In-Reply-To: <83wp3qcn5k.fsf@gnu.org>
On Fri, Oct 20, 2017 at 3:07 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>> * thread #1, name = 'bootstrap-emacs', stop reason = signal SIGSEGV: invalid address (fault address: 0x41626d78)
>> 0x000000000022810c XFLOAT_INIT at /root/emacs/src/alloc.c:543
>> 0x0000000000227eb0 make_float at /root/emacs/src/alloc.c:2667
>> 0x000000000022de24 init_alloc at /root/emacs/src/alloc.c:7481
>> 0x000000000016825c main at /root/emacs/src/emacs.c:1251
> Can you disassemble XFLOAT_INIT and tell which part of it caused the
> segfault, and why? In particular, what is the relation of the
> faulting address 0x41626d78 and the C source?
The faulting address is XFLOAT(f):
static void
XFLOAT_INIT (Lisp_Object f, double n)
{
XFLOAT (f)->u.data = n;
}
'f' is 'val' in make_float. I added a fprintf(stderr, "%p\n",
XFLOAT(val)) before the XFLOAT_INIT call, the address which was ok
with temacs triggers SIGSEGV in bootstrap-emacs.
It seems that the memory pointer to by float_block->floats becomes
invalid following the dumping process.
By the way, when I delete bootstrap-emacs and redump, the faulting
address changes (although it's always of the form 0x4XXXXXXX).
next prev parent reply other threads:[~2017-10-24 18:43 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-31 16:34 bug#28308: Build failure on FreeBSD/aarch64 Gergely Czuczy
2017-08-31 16:47 ` Glenn Morris
2017-08-31 17:02 ` Gergely Czuczy
2017-09-02 3:13 ` npostavs
2017-09-04 12:32 ` Gergely Czuczy
2017-09-08 23:52 ` npostavs
2017-09-09 5:01 ` Gergely Czuczy
2017-09-09 7:07 ` Eli Zaretskii
2017-09-11 6:07 ` npostavs
2017-09-11 7:26 ` Gergely Czuczy
2017-09-11 14:45 ` Eli Zaretskii
2017-09-11 15:10 ` Gergely Czuczy
2017-09-11 15:31 ` Eli Zaretskii
2017-09-11 17:12 ` Gergely Czuczy
2017-09-11 17:17 ` Eli Zaretskii
2017-09-11 19:57 ` Gergely Czuczy
2017-09-11 20:33 ` Gergely Czuczy
2017-09-12 5:22 ` npostavs
2017-09-12 5:57 ` Gergely Czuczy
2017-09-12 14:59 ` Eli Zaretskii
2017-09-12 15:13 ` Gergely Czuczy
2017-09-20 5:51 ` Gergely Czuczy
2017-09-20 19:29 ` Noam Postavsky
2017-10-19 23:39 ` Noam Postavsky
2017-10-20 7:07 ` Eli Zaretskii
2017-10-24 18:43 ` Noam Postavsky [this message]
2017-10-31 17:31 ` Noam Postavsky
2017-10-31 20:21 ` Eli Zaretskii
2017-11-01 16:14 ` Gergely Czuczy
2017-11-01 16:51 ` Noam Postavsky
2017-11-01 18:27 ` Gergely Czuczy
2017-11-01 18:52 ` Noam Postavsky
2017-11-02 21:03 ` Gergely Czuczy
2017-11-04 23:14 ` Noam Postavsky
2017-11-05 18:10 ` Gergely Czuczy
2017-11-06 23:14 ` Noam Postavsky
2017-09-14 0:51 ` Paul Eggert
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