Emacs cannot dump on GNUstep

[Yavor Doganov <yavor@gnu.org>]

[CC-ing emacs-devel instead of bug #1171, as this is a general problem.]

At Wed, 12 Nov 2008 14:19:10 -0500,
Adrian Robert wrote:
> On Nov 12, 2008, at 2:11 PM, Yavor Doganov wrote:
> > Stefan Monnier wrote:
> >>
> >> (better fix the underlying problem and get dumping to work for
> >> GNUstep).
> >
> > Does this require changes in the GNU ObjC runtime, GNUstep, or Emacs?
> > Or a combination of these?
> 
> Unknown, hopefully just the last one, or the last two.  If someone
> (you?) who is compiling / testing on GNUstep could get together a
> description of the failure when dumping is attempted (probably a
> stack trace of the crash when the dumped emacs is run), and post
> that to gnustep-dev@gnu.org , that would be a good start to learning
> more / starting on a solution.

OK, I did a fresh checkout, and only commented this in configure.in:

/* Sadly for now, GNUstep dump does not work.  */
#ifdef NS_IMPL_GNUSTEP
#define CANNOT_DUMP
#endif

On a GNU/Linux system with

GNU libc 2.7
GCC 4.3.2
GNUstep Base 1.16.1 (built against libffi 3.0.6)
GNUstep GUI 0.14.0

I get the following failure in `make bootstrap':
...
Loading /home/yavor/scratch/emacs/lisp/vc-hooks.el (source)...
Loading /home/yavor/scratch/emacs/lisp/ediff-hook.el (source)...
Loading /home/yavor/scratch/emacs/lisp/tooltip.el (source)...
((299647 . 7630) (14458 . 2) (661 . 158) 2099780 1312349 (108 . 2) (23 . 19) (32049 . 11862))
Finding pointers to doc strings...
Finding pointers to doc strings...done
Dumping under the name emacs
73426 pure bytes used
mv -f emacs bootstrap-emacs
cd ../lisp; make -w compile-first EMACS=../src/bootstrap-emacs
make[3]: Entering directory `/home/yavor/scratch/emacs/lisp'
Compiling /home/yavor/scratch/emacs/lisp/emacs-lisp/bytecomp.el
make[3]: *** [/home/yavor/scratch/emacs/lisp/emacs-lisp/bytecomp.elc] Segmentation fault
make[3]: Leaving directory `/home/yavor/scratch/emacs/lisp'
make[2]: *** [bootstrap-emacs] Error 2
make[2]: Leaving directory `/home/yavor/scratch/emacs/src'
make[1]: *** [src] Error 2
make[1]: Leaving directory `/home/yavor/scratch/emacs'
make: *** [bootstrap] Error 2

gdb src/bootstrap-emacs
(gdb) cd lisp
Working directory /home/yavor/scratch/emacs/lisp.
(gdb) r -f batch-byte-compile emacs-lisp/bytecomp.el
Starting program: /home/yavor/scratch/emacs/src/bootstrap-emacs -f batch-byte-compile emacs-lisp/bytecomp.el
[Thread debugging using libthread_db enabled]
[New Thread 0xb6f836c0 (LWP 24785)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb6f836c0 (LWP 24785)]
0xb77a00ae in objc_hash_string (cache=0x8810428, key=0x6004e)
    at /scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/objc/hash.h:181
181	/scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/objc/hash.h: No such file or directory.
	in /scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/objc/hash.h
#0  0xb77a00ae in objc_hash_string (cache=0x8810428, key=0x6004e)
    at /scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/objc/hash.h:181
	ret = 0
	ctr = 0
	ckey = 0x6004e <Address 0x6004e out of bounds>
#1  0xb779caba in objc_hash_value_for_key (cache=0x8810428, key=0x6004e)
    at /scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/hash.c:251
	node = <value optimized out>
	retval = <value optimized out>
#2  0xb77a03b0 in __sel_register_typed_name (
    name=0x6004e <Address 0x6004e out of bounds>, types=0x0, orig=0x83a1880, 
    is_const=1 '\001')
    at /scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/selector.c:371
	j = <value optimized out>
	i = 1
	l = <value optimized out>
#3  0xb779d89c in __objc_exec_class (module=0x83a1d98)
    at /scratch/packages/gcc/4.3/gcc-4.3-4.3.2/src/libobjc/init.c:563
	symtab = (Symtab_t) 0x83a1868
	cell = <value optimized out>
	selectors = (SEL) 0x83a1880
	i = <value optimized out>
	previous_constructors = 1 '\001'
---Type <return> to continue, or q <return> to quit---
	unclaimed_categories = (struct objc_list *) 0x0
	__PRETTY_FUNCTION__ = "__objc_exec_class"
#4  0x0822d9b0 in __objc_gnu_init () at nsfont.m:1490
No locals.
#5  0x0823bbcd in __do_global_ctors_aux ()
No locals.
#6  0x0808e594 in _init ()
No locals.
#7  0x0823bb69 in __libc_csu_init ()
No locals.
#8  0xb75793ec in __libc_start_main () from /lib/i686/cmov/libc.so.6
No symbol table info available.
#9  0x0808f781 in _start ()
No locals.