10:16 a.m.
Hi !
While tracking down the problem that makes the current XEmacs 21.5 unusable on
my linux box (it's been so for a long long time now), I went into this:
Current directory is /usr/local/src/xemacs/src/
GNU gdb 5.0.90-cvs (MI_OUT)
Copyright 2001 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
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Type "show copying" to see the conditions.
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This GDB was configured as "i386-linux"...
(gdb) break reinit_vars_of_eval
Breakpoint 1 at 0x80e7f76: file /usr/local/src/XEmacs-21.5/src/eval.c, line
6333.
(gdb) run -vanilla
Starting program: /usr/local/src/xemacs/src/xemacs -vanilla
Breakpoint 1, reinit_vars_of_eval ()
at /usr/local/src/XEmacs-21.5/src/eval.c:6333
(gdb) next
(gdb)
(gdb)
(gdb)
(gdb)
(gdb)
(gdb) set always_gc = 1
(gdb) set max_specpdl_size = 10000
(gdb) cont
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x0808c08e in mark_string (obj={...})
at /usr/local/src/XEmacs-21.5/src/alloc.c:1874
[ weird: it's DECLARE_FIXED_TYPE_ALLOC (string, Lisp_String); ]
(gdb) pobj obj
$3 = (Lisp_String *) 0x405cae34
$4 = {u = {...}, size_ = 6, data_ = 0x406d7d78 "newbuf", plist = {...}}
But then, I don't really know what to do next. Any advice ?
--
Didier Verna, didier(a)lrde.epita.fr, http://www.lrde.epita.fr/~didier
EPITA / LRDE, 14-16 rue Voltaire Tel.+33 (1) 53 14 59 22
94276 Le Kremlin-Bicêtre, France Fax.+33 (1) 53 14 59 22 didier(a)xemacs.org
2:57 p.m.
>>>> "drv" == Didier Verna
<didier(a)xemacs.org> writes:
drv> Program received signal SIGSEGV, Segmentation fault.
drv> 0x0808c08e in mark_string (obj={...})
drv> at /usr/local/src/XEmacs-21.5/src/alloc.c:1874
drv> [ weird: it's DECLARE_FIXED_TYPE_ALLOC (string, Lisp_String); ]
Our dlmalloc code is alleged broken (by Wolfram.Gloger(a)malloc.de),
specifically the use of mmap, and I've seen breakage for glibc >
2.2.5. Try --pdump and/or --with-system-malloc for some relief, but I
don't think they actually are fixes. I don't know why pdump helps,
but --with-system-malloc basically has the effect of bumping the mmap
threshold to 1MB, and XEmacs rarely mallocs that much at once, we
prefer to do it a cons at a time (but they're big conses ;-).
--
Institute of Policy and Planning Sciences http://turnbull.sk.tsukuba.ac.jp
University of Tsukuba Tennodai 1-1-1 Tsukuba 305-8573 JAPAN
Ask not how you can "do" free software business;
ask what your business can "do for" free software.
5:26 p.m.
Stephen J. Turnbull wrote:
Our dlmalloc code is alleged broken (by Wolfram.Gloger(a)malloc.de),
specifically the use of mmap, and I've seen breakage for glibc >
2.2.5. Try --pdump and/or --with-system-malloc for some relief, but I
don't think they actually are fixes. I don't know why pdump helps,
but --with-system-malloc basically has the effect of bumping the mmap
threshold to 1MB, and XEmacs rarely mallocs that much at once, we
prefer to do it a cons at a time (but they're big conses ;-).
Actually, I've tried several combinations but with no luck. I smell a
GCPRO bug but I'm a bit at a loss as far as tracking it down. For the record,
here's a valgrind output I get. The interesting part is ==16854==.
--
Didier Verna, didier(a)lrde.epita.fr, http://www.lrde.epita.fr/~didier
EPITA / LRDE, 14-16 rue Voltaire Tel.+33 (1) 53 14 59 22
94276 Le Kremlin-Bicêtre, France Fax.+33 (1) 53 14 59 22 didier(a)xemacs.org
7:48 a.m.
>>>> "drv" == Didier Verna
<didier(a)xemacs.org> writes:
drv> Stephen J. Turnbull wrote:
> Our dlmalloc code is alleged broken (by
> Wolfram.Gloger(a)malloc.de), specifically the use of mmap, and
> I've seen breakage for glibc > 2.2.5. Try --pdump and/or
> --with-system-malloc for some relief, but I don't think they
> actually are fixes. I don't know why pdump helps, but
> --with-system-malloc basically has the effect of bumping the
> mmap threshold to 1MB, and XEmacs rarely mallocs that much at
> once, we prefer to do it a cons at a time (but they're big
> conses ;-).
drv> Actually, I've tried several combinations but with no
drv> luck. I smell a GCPRO bug but I'm a bit at a loss as far as
drv> tracking it down.
OK, (1) I see you've got glibc 2.2.4, so you are not a victim of the
2.3 changes. 21.5 always built fine for me with glibc <= 2.2.5.
(2) Have you tried turning mmap off? This is how Gloger did it in
21.4. Cf the thread anchored at
<a
href="http://list-archive.xemacs.org/xemacs-beta/200211/msg00065.htm...
87d6pl5sw9.fsf(a)tleepslib.sk.tsukuba.ac.jp
</a>
subject "XEmacs 21.4.10 crashes with glibc 2.3.1."
--- src/alloc.c.orig Mon Dec 17 06:49:22 2001
+++ src/alloc.c Thu Nov 7 00:27:31 2002
＠＠ -3882,8 +3890,8 ＠＠
#ifdef DOUG_LEA_MALLOC
mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */
mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */
-#if 0 /* Moved to emacs.c */
- mallopt (M_MMAP_MAX, 64); /* max. number of mmap'ed areas */
+#if 1 /* Moved to emacs.c */
+ mallopt (M_MMAP_MAX, 0); /* max. number of mmap'ed areas */
#endif
#endif
init_string_alloc ();
--- src/emacs.c.orig Thu Oct 31 16:07:36 2002
+++ src/emacs.c Thu Nov 7 00:25:47 2002
＠＠ -2713,7 +2713,8 ＠＠
if (!initialized)
{
#ifdef DOUG_LEA_MALLOC
- mallopt (M_MMAP_MAX, 0);
+ if (mallopt (M_MMAP_MAX, 0) != 1)
+ abort();
#endif
run_temacs_argc = 0;
if (! SETJMP (run_temacs_catch))
＠＠ -2770,7 +2771,8 ＠＠
defined(_NO_MALLOC_WARNING_) || \
(defined(__GLIBC__) && __GLIBC_MINOR__ < 1 && !defined(MULE)) ||
\
defined(DEBUG_DOUG_LEA_MALLOC)
- mallopt (M_MMAP_MAX, 64);
+ if(mallopt (M_MMAP_MAX, 0) != 1)
+ abort();
#endif
#ifdef REL_ALLOC
r_alloc_reinit ();
--
Institute of Policy and Planning Sciences http://turnbull.sk.tsukuba.ac.jp
University of Tsukuba Tennodai 1-1-1 Tsukuba 305-8573 JAPAN
Ask not how you can "do" free software business;
ask what your business can "do for" free software.
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participants (2)
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Didier Verna -
Stephen J. Turnbull