Message-ID: <B0FEA00E82A7D1118BFB00A0CC99027821336A@ARGON>
From: Michel de Ruiter <Michel AT smr DOT nl>
To: "'DJGPP workers'" <djgpp-workers AT delorie DOT com>
Subject: Gcc crash
Date: Fri, 6 Aug 1999 11:59:57 +0200 
X-Mailer: Internet Mail Service (5.5.2448.0)
Reply-To: djgpp-workers AT delorie DOT com

Hi, workers,

My GCC 2.95 crashed again. I tested all my memory very thoroughly,
under DOS and Linux and irrespective of both using memtest (?), so
that is not the problem. It might be my CPU or motherboard, I'm not
sure how to test those. When I try to compiling Emacs-20.4, the
following happens:

ls -l j:/lib/gcc-lib/djgpp/2.95/cc1.exe
-rwxr-xr-x   1 mdruiter root      1861026 Jul 15 01:09
j:/lib/gcc-lib/djgpp/2.95/cc1.exe

make install
...
gcc -c  -Demacs -DHAVE_CONFIG_H   -I. -I.             -O2 -gcoff w16select.c
Exiting due to signal SIGSEGV
General Protection Fault at eip=000c0ba2
eax=011a7140 ebx=003212cc ecx=00000061 edx=00000006 esi=00469c8c
edi=00469c8c
ebp=003212bc esp=00321274 program=j:/lib/gcc-lib/djgpp/2.95/cc1.exe
cs: sel=0167  base=10290000  limit=0047ffff
ds: sel=016f  base=10290000  limit=0047ffff
es: sel=016f  base=10290000  limit=0047ffff
fs: sel=014f  base=00011b20  limit=0000ffff
gs: sel=017f  base=00000000  limit=0010ffff
ss: sel=016f  base=10290000  limit=0047ffff
App stack: [00323104..001a3104]  Exceptn stack: [001a3010..001a10d0]

Call frame traceback EIPs:
  0x000c0ba2 _extended_count+6238
  0x000b84b9 _combine_instructions+25381
  0x000b6898 _combine_instructions+18180
  0x000b67cf _combine_instructions+17979
  0x000b67cf _combine_instructions+17979
  0x000b3925 _combine_instructions+6033
  0x000b24bf _combine_instructions+811
  0x0000ae03 _rest_of_compilation+2715
  0x001624a4 _finish_function+188
  0x0014ed0e _yyparse+3366
  0x00009ae1 _check_global_declarations+3357
  0x0000d8f3 _main+4199
  0x00175504 ___crt1_startup+204

I do not have the any gcc sources, but I doubt they would help a lot.

If I type `make w16select.o' after the crash, or just `make', gcc does
*not* crash on w16select.c any more, and the build succeeds. The crash
only happens when I run `make' from start. This makes it very hard to
track down the precise problem.

If I change the maximum size of virtual memory using cwsparam, the
crash goes away in this particular case. I did *not* set up cwsdpmi to
use near 255Mb, having heard about some bugs.

It must be something particular to my setup. I run MS-DOS 7.10 (Win98
without GUI) with cwsdpmi-r4.

If anyone has a vague guess or idea of what might be going on, please
help.

Groeten, Michel.