[Bug c/16274] New: Memory allocation error for arrays on stack

["sourangshu at csa dot iisc dot ernet dot in" <gcc-bugzilla at gcc dot gnu dot org>]

The following simple c code gives segmentation fault on a GNU-Linux system
(Redhat-9.0) running on a Pentium 4 machine with 512 MB RAM.


Source file : test.c

-----------------------------------------------------
#include<stdio.h>

int main()
{
  int a[1024][1024];
  int b[1024][1024];

  b[0][0]=13;
  
  return 0;
}
--------------------------------------------------------

Compile:

--------------------------------------------------------------------------------

[sourangshu@arkavathi temp]$ gcc -v test.c
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit --host=i386-redhat-linux
Thread model: posix
gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
 /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/cc1 -lang-c -v -D__GNUC__=3
-D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=2 -D__GXX_ABI_VERSION=102 -D__ELF__
-Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__
-D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -Acpu=i386
-Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i386__ test.c -quiet
-dumpbase test.c -version -o /tmp/ccRbyPuy.s
GNU CPP version 3.2.2 20030222 (Red Hat Linux 3.2.2-5) (cpplib) (i386 Linux/ELF)
GNU C version 3.2.2 20030222 (Red Hat Linux 3.2.2-5) (i386-redhat-linux)
        compiled by GNU C version 3.2.2 20030222 (Red Hat Linux 3.2.2-5).
ignoring nonexistent directory "/usr/i386-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/include
 /usr/include
End of search list.
 as -V -Qy -o /tmp/ccazr8n2.o /tmp/ccRbyPuy.s
GNU assembler version 2.13.90.0.18 (i386-redhat-linux) using BFD version
2.13.90.0.18 20030206
 /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/collect2 --eh-frame-hdr -m elf_i386
-dynamic-linker /lib/ld-linux.so.2
/usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crt1.o
/usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crti.o
/usr/lib/gcc-lib/i386-redhat-linux/3.2.2/crtbegin.o
-L/usr/lib/gcc-lib/i386-redhat-linux/3.2.2
-L/usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../.. /tmp/ccazr8n2.o -lgcc
-lgcc_eh -lc -lgcc -lgcc_eh /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/crtend.o
/usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crtn.o

-------------------------------------------------------------------------------

Execution :

-------------------------------------------------------------------------------
[sourangshu@arkavathi temp]$ ./a.out
Segmentation fault
[sourangshu@arkavathi temp]$ 
-------------------------------------------------------------------------------

Please see whats the problem.
Thank you.
Regards,
Sourangshu.

-- 
           Summary: Memory allocation error for arrays on stack
           Product: gcc
           Version: 3.2.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P1
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sourangshu at csa dot iisc dot ernet dot in
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i386-redhat-linux
  GCC host triplet: i386-redhat-linux
GCC target triplet: i386-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16274