bug#28308: Build failure on FreeBSD/aarch64

[Eli Zaretskii]

> Cc: 28308@debbugs.gnu.org
> From: Gergely Czuczy <gergely.czuczy@harmless.hu>
> Date: Mon, 11 Sep 2017 09:26:20 +0200
> 
> I've rebuilt it with CFLAGS="-O0 -g", but it seems to be the same in 
> this regards:
> root@build-pine64:/usr/ports/editors/emacs-devel# cd 
> /usr/ports/editors/emacs-devel/work/emacs-f44184f/lisp
> root@build-pine64:/usr/ports/editors/emacs-devel/work/emacs-f44184f/lisp# 
> EMACSLOADPATH= lldb -- '../src/bootstrap-emacs' -batch --no-site-file 
> --no-site-lisp --eval '(setq load-prefer-newer t)' -f batch-byte-compile 
> emacs-lisp/macroexp.el
> (lldb) target create "../src/bootstrap-emacs"
> Current executable set to '../src/bootstrap-emacs' (aarch64).
> (lldb) settings set -- target.run-args  "-batch" "--no-site-file" 
> "--no-site-lisp" "--eval" "(setq load-prefer-newer t)" "-f" 
> "batch-byte-compile" "emacs-lisp/macroexp.el"
> (lldb) r
> Process 88583 launching
> Process 88583 launched: '../src/bootstrap-emacs' (aarch64)
> Process 88583 stopped
> * thread #1, name = 'bootstrap-emacs', stop reason = signal SIGSEGV: 
> invalid address (fault address: 0x41b17978)
>      frame #0: 0x0000000000228460 
> bootstrap-emacs`xnrealloc(pa=0x0000000000000000, nitems=0, 
> item_size=1102150015) at alloc.c:939
>     936  {
>     937    eassert (0 <= nitems && 0 < item_size);
>     938    ptrdiff_t nbytes;
> -> 939    if (INT_MULTIPLY_WRAPV (nitems, item_size, &nbytes) || 
> SIZE_MAX < nbytes)
>     940      memory_full (SIZE_MAX);
>     941    return xrealloc (pa, nbytes);
>     942  }
> (lldb) bt
> * thread #1, name = 'bootstrap-emacs', stop reason = signal SIGSEGV: 
> invalid address (fault address: 0x41b17978)
>    * frame #0: 0x0000000000228460 
> bootstrap-emacs`xnrealloc(pa=0x0000000000000000, nitems=0, 
> item_size=1102150015) at alloc.c:939
>      frame #1: 0x0000000000228204 
> bootstrap-emacs`xnrealloc(pa=0x000000000019ae38, nitems=42949672960, 
> item_size=281474976703896) at alloc.c:939
>      frame #2: 0x000000000022e208 
> bootstrap-emacs`xpalloc(pa=0x0000000000000000, 
> nitems=0x0000000041b1797f, nitems_incr_min=1683000, 
> nitems_max=42949672960, item_size=281474976703896) at alloc.c:0
>      frame #3: 0x0000000000168214 
> bootstrap-emacs`delete_tty(terminal=0x3276551740f23ac5) at term.c:4463
>      frame #4: 0x0000000000040190 bootstrap-emacs`__start + 376
>      frame #5: 0x0000000040390018 ld-elf.so.1`.rtld_start at rtld_start.S:41
> (lldb)

I don't understand how can this be.  Can you go to frame #3, in
delete_tty, and show what line of C code there allegedly calls
xpalloc?