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Re: segmentation fault in allocate_string

From: Klaus Zeitler
Subject: Re: segmentation fault in allocate_string
Date: Wed, 13 Oct 2004 10:26:55 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/21.3.50 (usg-unix-v)

>>>>> "Richard" == Richard Stallman <address@hidden> writes:
    Richard>     #13 <signal handler called>
    Richard>     #14 allocate_string () at 
    Richard>     ---Type <return> to continue, or q <return> to quit--- 
    Richard>     #15 0x0013b2e4 in make_uninit_multibyte_string (nchars=4, 
    Richard>    at /vol/freeware/cvs/emacs/head/emacs/src/alloc.c:2142
    Richard>     #16 0x0013b2ac in make_uninit_string (length=4)
    Richard>    at /vol/freeware/cvs/emacs/head/emacs/src/alloc.c:2123
    Richard> Can you look at the data in those frames to see
    Richard> what was the cause of the crash?

I'm not quite sure what data you want.
In function allocate_string in alloc.c emacs grabs the first
string from string_free_list and then calls:

string_free_list = NEXT_FREE_LISP_STRING (s);

Unfortunately string_free_list is already broken in this function:
(gdb) p string_free_list
$5 = (struct Lisp_String *) 0xc8

But I have no idea when and how string_free_list gets mangled.


|  Klaus Zeitler      Lucent Technologies  |
|  Email:             address@hidden  |
Lie, n.:
A very poor substitute for the truth, but the only one discovered to date.

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