[Bug c/60388] New: Program received signal SIGSEGV, Segmentation fault. 0xb7fb62ff in __pthread_create_2_1

["sree.gooogle at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60388

            Bug ID: 60388
           Summary: Program received signal SIGSEGV, Segmentation fault.
                    0xb7fb62ff in __pthread_create_2_1
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sree.gooogle at gmail dot com

Created attachment 32242
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32242&action=edit
c program used for Segmentation fault at line number 563 in pthread_create.c

Hi,

Please take a look at this issue. I have faced a SIGSEGV at line number 563 in
pthread_create.c. The program Crashed in the below fashion:
(gdb)s
514     in pthread_create.c
(gdb)
518     in pthread_create.c
(gdb)
563     in pthread_create.c
(gdb)
Program received signal SIGSEGV, Segmentation fault.
0xb7fb62ff in __pthread_create_2_1 (newthread=0x0, attr=0x0,
start_routine=0x80484cc <mx_thrd>, arg=0x0) at pthread_create.c:563
563     in pthread_create.c
(gdb)
(gdb) bt
#0  0xb7fb62ff in __pthread_create_2_1 (newthread=0x0, attr=0x0,
start_routine=0x80484cc <mx_thrd>, arg=0x0) at pthread_create.c:563
#1  0x0804853c in main () at max_trd_creation.c:22
(gdb) i frame
Stack level 0, frame at 0xbffff670:
 eip = 0xb7fb62ff in __pthread_create_2_1 (pthread_create.c:563); saved eip
0x804853c
 called by frame at 0xbffff6a0
 source language c.
 Arglist at unknown address.
 Locals at unknown address, Previous frame's sp is 0xbffff670
 Saved registers:
  ebx at 0xbffff65c, ebp at 0xbffff668, esi at 0xbffff660, edi at 0xbffff664,
eip at 0xbffff66c
(gdb)s
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb)

I am going through the below link for details about the line number 563 in
pthread_create.c
http://code.woboq.org/userspace/glibc/nptl/pthread_create.c.html
557    if (iattr->flags & ATTR_FLAG_SCHED_SET)
558    memcpy (&pd->schedparam, &iattr->schedparam,
559    sizeof (struct sched_param));
560    else if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
561    {
562    INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam);
563    pd->flags |= ATTR_FLAG_SCHED_SET;
564    }


What is the gcc version which I have used?
==========================================
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)

How I compiled the program and what are all the options given and the warnings
produced?
===============================================================================
labro@ubuntu:~/Desktop/sree/DevUnix$ gcc max_trd_creation.c -g -lpthread
max_trd_creation.c: In function âmainâ:
max_trd_creation.c:22:3: warning: passing argument 1 of âpthread_createâ makes
pointer from integer without a cast [enabled by default]
In file included from max_trd_creation.c:2:0:
/usr/include/pthread.h:225:12: note: expected âpthread_t * __restrict__â but
argument is of type âpthread_tâ


I have attached the piece of code which I have used for producing this seg
fault. 

Kindly ignore this if you dot see something useful. 


Thanks and Regards,
Sreenath
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`341

--- Comment #11 from Mikael Morin <mikael at gcc dot gnu.org> ---
Author: mikael
Date: Sun Mar  2 18:36:42 2014
New Revision: 208258

URL: http://gcc.gnu.org/viewcvs?rev 8258&root=gcc&view=rev
Log:
fortran/
        PR fortran/60341
        * frontend-passes.c (optimize_comparison): Guard two union
        accesses with the corresponding tag checks.

testsuite/
        PR fortran/60341
        * gfortran.dg/str_comp_optimize_1.f90: New test.


Added:
    branches/gcc-4_8-branch/gcc/testsuite/gfortran.dg/str_comp_optimize_1.f90
Modified:
    branches/gcc-4_8-branch/gcc/fortran/ChangeLog
    branches/gcc-4_8-branch/gcc/fortran/frontend-passes.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog