Re: crashes on x86_64

[Kim F. Storm]

Reiner Steib <address@hidden> writes:

> On Tue, Aug 30 2005, Reiner Steib wrote:
>
>> On Tue, Aug 30 2005, Kim F. Storm wrote:
>>
>>> Reiner Steib <address@hidden> writes:
>> [...]
>>> In lisp.h, can you try to enable extended GC checking by
>>> changing the 0 to 1 in the following line in lisp.h:
>> [...]
>>> and try again.
>>
>> Done.  I will report when I get a new crash.
>
> With extended GC checking enabled, I didn't get a crash with normal
> use within 2 days.
>
> But the checking makes Emacs quite unresponsive (even on this Athlon
> 3500+ machine).  So I reverted it and compiled again.  Then I soon got
> a very similar crash when creating many, many new frames (using my
> shortcut key for `make-frame-command' repeatedly):

Is this crash repeatable?

And the same crash does NOT occur with GC checking enabled?

Very wierd.

Anything special in the frame?


>
> ,----
> | Program received signal SIGSEGV, Segmentation fault.
> | [Switching to Thread 182940272320 (LWP 8221)]
> | make_uninit_multibyte_string (nchars=36, nbytes=36)
> |     at /home/dept/ste/src/links/emacs/cvs-HEAD/emacs/src/alloc.c:1884
> | 1884      string_free_list = NEXT_FREE_LISP_STRING (s);
> | (gdb) bt full
> | #0  make_uninit_multibyte_string (nchars=36, nbytes=36)
> |     at /home/dept/ste/src/links/emacs/cvs-HEAD/emacs/src/alloc.c:1884
> |         string = Variable "string" is not available.
> | (gdb) xbacktrace 
> | "set-face-attribute-from-resource"
> | "set-face-attributes-from-resources"
> | "make-face-x-resource-internal"
> | "byte-code"
> | "face-set-after-frame-default"
> | "x-create-frame-with-faces"
> | "make-frame"
> | "make-frame-command"
> | "call-interactively"
> | (gdb) q
> `----
>
> After this, I recompiled with...
>
> ,----[ src/lisp.h ]
> | #if 1
> | /* Define this temporarily to hunt a bug.  If defined, the size of
> |    strings is redundantly recorded in sdata structures so that it can
> |    be compared to the sizes recorded in Lisp strings.  */
> | 
> | #define GC_CHECK_STRING_BYTES 1
> | 
> | /* Define this to check for short string overrun.  */
> | 
> | #define GC_CHECK_STRING_OVERRUN 1
> | 
> | /* Define this to check the string free list.  */
> | 
> | #define GC_CHECK_STRING_FREE_LIST 1
> | 
> | /* Define this to check for malloc buffer overrun.  */
> | 
> | #define XMALLOC_OVERRUN_CHECK 0
> | 
> | /* Define this to check for errors in cons list.  */
> | /* #define GC_CHECK_CONS_LIST 1 */
> | 
> | #endif /* 0 */
> `----
>
> ... and got a crash when creating many, many frames:
>
> ,----
> | (gdb) r -name Gnus -xrm 'Emacs.toolBar:1'
> | Starting program: [...]/x86_64/src/emacs -name Gnus -xrm 'Emacs.toolBar:1'
> | [Thread debugging using libthread_db enabled]
> | [New Thread 182940272320 (LWP 28901)]
> | Detaching after fork from child process 28902.
> | Detaching after fork from child process 28907.
> | 
> | Program received signal SIGSEGV, Segmentation fault.
> | [Switching to Thread 182940272320 (LWP 28901)]
> | redisplay_internal (preserve_echo_area=Variable "preserve_echo_area" is not 
> available.
> | )   
> |     at [...]/emacs/src/xdisp.c:10684
> | 10684                 mark_window_display_accurate (f->root_window, 1);
> | (gdb) bt full
> | #0  redisplay_internal (preserve_echo_area=Variable "preserve_echo_area" is 
> not available.
> | )
> |     at [...]/emacs/src/xdisp.c:10684
> |         f = (struct frame *) 0x400000000000043f
> |         w = (struct window *) 0x1bee5a0
> |         f = Variable "f" is not available.
> | (gdb) xbacktrace 
> | (gdb) p w
> | $1 = (struct window *) 0x1bee5a0
> | (gdb) p f
> | $2 = (struct frame *) 0x400000000000043f
> | (gdb) pr w
> | #<EMACS BUG: INVALID DATATYPE (0x07) Save your buffers immediately and 
> please report this bug>
> | (gdb) pr f
> | #<EMACS BUG: INVALID DATATYPE (0x07) Save your buffers immediately and 
> please report this bug>
> `----
>
> Bye, Reiner.
> -- 
>        ,,,
>       (o o)
> ---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/
>
>

-- 
Kim F. Storm <address@hidden> http://www.cua.dk