public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c/47141] New: segfault
@ 2011-01-01  1:47 regehr at cs dot utah.edu
  2011-01-01 13:36 ` [Bug tree-optimization/47141] [4.6 Regression] segfault jakub at gcc dot gnu.org
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: regehr at cs dot utah.edu @ 2011-01-01  1:47 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47141

           Summary: segfault
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu
                CC: chenyang@cs.utah.edu


Searching on "Segmentation fault" in the bugzilla returns hundreds of matches
so I can't really verify this is new, sorry!  But at least it's a small
testcase :).  

Valgrind talks about a read past the bound of a malloc'd block and also about a
null ptr dereference -- hard to tell what is the real problem.

[regehr@gamow tmp435]$ current-gcc -c small.c -O2

small.c: In function 'func_115':
small.c:30:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[regehr@gamow tmp435]$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r168380-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r168380-install
--program-prefix=r168380- --enable-languages=c,c++
Thread model: posix
gcc version 4.6.0 20101231 (experimental) (GCC) 

[regehr@gamow tmp435]$ cat small.c

typedef signed char int8_t;
typedef int int32_t;
typedef unsigned int uint32_t;
static uint32_t
safe_add_func_uint32_t_u_u (uint32_t ui1, uint32_t ui2)
{
  return ui1 + ui2;
};

int8_t *const
func_112 (int32_t * p_113, int8_t p_114)
{
  func_115 (func_115, 0);
  return 0;
}

int32_t
func_115 (uint32_t p_116, uint32_t p_117, int8_t * p_118)
{
  int32_t l_141;
  int32_t *l_186 = &l_141;
  if (l_141)
    {
    }
  else
    for (l_141 = 0; l_141; l_141 = safe_add_func_uint32_t_u_u (l_141, 1))
      {
      }
  return *l_186;
}


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2011-01-10 16:51 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-01-01  1:47 [Bug c/47141] New: segfault regehr at cs dot utah.edu
2011-01-01 13:36 ` [Bug tree-optimization/47141] [4.6 Regression] segfault jakub at gcc dot gnu.org
2011-01-01 17:09 ` hjl.tools at gmail dot com
2011-01-03 21:43 ` rguenth at gcc dot gnu.org
2011-01-06 23:38 ` law at redhat dot com
2011-01-07 16:17 ` law at redhat dot com
2011-01-07 19:48 ` law at redhat dot com
2011-01-10 13:59 ` law at redhat dot com
2011-01-10 17:00 ` law at gcc dot gnu.org
2011-01-10 17:01 ` law at redhat dot com

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).