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bug#45214: guile segfaults on 32-bit big-endian targets
From: |
John David Anglin |
Subject: |
bug#45214: guile segfaults on 32-bit big-endian targets |
Date: |
Sat, 12 Dec 2020 17:21:00 -0500 |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 |
On 2020-12-12 4:26 p.m., John Paul Adrian Glaubitz wrote:
> I assume the crash has got something to do how values are packed and unpacked
> into the SCM object type. I have not been able to find the problem yet myself,
> unfortunately which is why I am reporting this issue here.
I see this in scm.h:
/* The 0?: constructions makes sure that the code is never executed, and
that there is no performance hit. However, the alternative is
compiled, and does generate a warning when used with the wrong
pointer type. We use a volatile pointer type to avoid warnings from
clang.
The Tru64 and ia64-hp-hpux11.23 compilers fail on `case (0?0=0:x)'
statements, so for them type-checking is disabled. */
# if defined __DECC || defined __HP_cc
# define SCM_UNPACK(x) ((scm_t_bits) (x))
# else
# define SCM_UNPACK(x) ((scm_t_bits) (0? (*(volatile SCM *)0=(x)): x))
# endif
Regards,
Dave
--
John David Anglin dave.anglin@bell.net
- bug#45214: guile segfaults on 32-bit big-endian targets, John Paul Adrian Glaubitz, 2020/12/12
- bug#45214: guile segfaults on 32-bit big-endian targets, John David Anglin, 2020/12/12
- bug#45214: guile segfaults on 32-bit big-endian targets,
John David Anglin <=
- bug#45214: guile segfaults on 32-bit big-endian targets, John David Anglin, 2020/12/12
- bug#45214: guile segfaults on 32-bit big-endian targets, John David Anglin, 2020/12/12
- bug#45214: guile segfaults on 32-bit big-endian targets, John Paul Adrian Glaubitz, 2020/12/12
- bug#45214: guile segfaults on 32-bit big-endian targets, John David Anglin, 2020/12/12
- bug#45214: guile segfaults on 32-bit big-endian targets, John David Anglin, 2020/12/13
- bug#45214: guile segfaults on 32-bit big-endian targets, John Paul Adrian Glaubitz, 2020/12/13