From: "Jan D." <jan.h.d@swipnet.se>
Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org
Subject: Re: DJGPP only dumps with USE_LISP_UNION_TYPE ??
Date: Tue, 09 Nov 2004 11:25:22 +0100 [thread overview]
Message-ID: <41909B12.2060404@swipnet.se> (raw)
In-Reply-To: <01c4c619$Blat.v2.2.2$5f981160@zahav.net.il>
[-- Attachment #1: Type: text/plain, Size: 1414 bytes --]
Eli Zaretskii wrote:
>>Emacs fatal error: buffer.c:4944: assertion failed: XTYPE
>>(&buffer_defaults) == 0
>>
>>In gdb I see that &buffer_local_symbols which is what
>>Vbuffer_local_symbols uses, isn't aligned to an even 8 either. These
>>are aligned to an even 4. So DECL_ALIGN isn't working in this
>>configuration (?). Sounds strange.
>
>
> Could you write a short test program that demonstrates whether
> DECL_ALIGN works, and see if it fails on XP? (I could run it on my
> machine to see if it works on 98, which I think it does.) If
> DECL_ALIGN doesn't work, we certainly cannot use LSB tags in the XP
> build. We could then make the test program part of config.bat to DTRT
> at build time.
>
> Please also upgrade to a newer GCC version (I use 3.3.3), in case
> there's some alignment bug in your version.
Test program attached. Output when compiling in Cygwin, Gnu/Linux or MacOSX
is as expected:
ss1: rem 0
ss2: rem 0
ss3: rem 0
ss4: rem 0
but for djgpp (didn't find gcc 3.3.3, but 3.3.4):
D:\src>gcc -v
Reading specs from d:/djgpp/bin/../lib/gcc-lib/djgpp/3.34/specs
Configured with: /gcc/gnu/gcc-3.34/configure djgpp --prefix=/dev/env/DJDIR --dis
able-nls
Thread model: single
gcc version 3.3.4
D:\src>make align
gcc align.c -o align
D:\src>align
ss1: rem 4
ss2: rem 4
ss3: rem 4
ss4: rem 4
Very strange, considering Gnu/Linux and Cygwin are on the same machine.
Jan D.
[-- Attachment #2: align.c --]
[-- Type: text/plain, Size: 600 bytes --]
#include <stdio.h>
#define GCTYPEBITS 3
# define DECL_ALIGN(type, var) \
type __attribute__ ((__aligned__ (1 << GCTYPEBITS))) var
struct SS
{
char *ptr;
long nr;
};
DECL_ALIGN (struct SS, ss1);
DECL_ALIGN (struct SS, ss2);
DECL_ALIGN (struct SS, ss3);
DECL_ALIGN (struct SS, ss4);
int
main ()
{
int rem;
rem = (unsigned long)&ss1 % 8;
printf ("ss1: rem %d\n", rem);
rem = (unsigned long)&ss2 % 8;
printf ("ss2: rem %d\n", rem);
rem = (unsigned long)&ss3 % 8;
printf ("ss3: rem %d\n", rem);
rem = (unsigned long)&ss4 % 8;
printf ("ss4: rem %d\n", rem);
return 0;
}
[-- Attachment #3: Type: text/plain, Size: 142 bytes --]
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next prev parent reply other threads:[~2004-11-09 10:25 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-07 10:13 DJGPP only dumps with USE_LISP_UNION_TYPE ?? Jan D.
2004-11-07 10:50 ` Andreas Schwab
2004-11-07 12:02 ` Jan D.
2004-11-07 22:03 ` Eli Zaretskii
2004-11-07 21:56 ` Eli Zaretskii
2004-11-07 23:47 ` Jan D.
2004-11-08 8:10 ` Eli Zaretskii
2004-11-08 12:56 ` Eli Zaretskii
2004-11-08 16:44 ` Eli Zaretskii
2004-11-08 20:40 ` Jan D.
2004-11-09 5:01 ` Eli Zaretskii
2004-11-09 10:25 ` Jan D. [this message]
2004-11-09 14:17 ` Stefan
2004-11-09 17:28 ` Jan D.
2004-11-10 4:42 ` Eli Zaretskii
2004-11-10 8:12 ` Jan D.
2004-11-10 21:05 ` Eli Zaretskii
2004-11-10 4:36 ` Eli Zaretskii
2004-11-12 18:23 ` Eli Zaretskii
2004-11-14 10:17 ` Jan D.
2004-11-14 20:33 ` Eli Zaretskii
2004-11-27 12:36 ` Eli Zaretskii
2004-11-27 16:31 ` Jan D.
2004-11-27 16:33 ` Eli Zaretskii
2004-11-27 18:19 ` Eli Zaretskii
2004-11-27 22:54 ` Jan D.
2004-11-11 20:03 ` Eli Zaretskii
2004-11-08 15:15 ` Stefan
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