public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug libfortran/39176]  New: [4.4 Regression] -static and -fopenmp and io causes segfault
@ 2009-02-13 11:40 jv244 at cam dot ac dot uk
  2009-02-13 11:42 ` [Bug libfortran/39176] " jv244 at cam dot ac dot uk
                   ` (8 more replies)
  0 siblings, 9 replies; 15+ messages in thread
From: jv244 at cam dot ac dot uk @ 2009-02-13 11:40 UTC (permalink / raw)
  To: gcc-bugs

I noticed this running mixed mpi/openmp on a system that required an executable
without dynamics libraries. Don't know if the Fortran IO is supposed to be
thread safe (i.e. serialized thread safe), but this seems to work without
-static. It also appears to work with 4.3.1 but not 4.4 (trunk)

> cat test.f90
!$OMP PARALLEL
!$OMP CRITICAL
 write(6,*) "Hello world"
!$OMP END CRITICAL
!$OMP END PARALLEL
 write(6,*) "Done!"
END

> gfortran -static -fopenmp test.f90
> ./a.out
Segmentation fault
> gdb ./a.out
GNU gdb 6.4
Copyright 2005 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-suse-linux"...Using host libthread_db
library                            "/lib64/libthread_db.so.1".

(gdb) run
Starting program: /data/vondele/omptest/a.out

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x000000000040642f in get_external_unit (n=6, do_create=1)
    at /data/vondele/gcc_trunk/gcc/libgfortran/../gcc/gthr-posix.h:704
#2  0x0000000000404c01 in data_transfer_init (dtp=0x7fff047208c0, read_flag=0)
    at /data/vondele/gcc_trunk/gcc/libgfortran/io/transfer.c:1828
#3  0x00000000004003d6 in MAIN__.omp_fn.0 ()
#4  0x000000000040032c in MAIN__ ()
#5  0x000000000040042c in main (argc=1, argv=0x7fff04720fa8)
    at /data/vondele/gcc_trunk/gcc/libgfortran/fmain.c:21
(gdb)


-- 
           Summary: [4.4 Regression] -static and -fopenmp and io causes
                    segfault
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: libfortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39176


^ permalink raw reply	[flat|nested] 15+ messages in thread
[parent not found: <bug-39176-4@http.gcc.gnu.org/bugzilla/>]
end of thread, other threads:[~2024-04-08 20:17 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-02-13 11:40 [Bug libfortran/39176] New: [4.4 Regression] -static and -fopenmp and io causes segfault jv244 at cam dot ac dot uk
2009-02-13 11:42 ` [Bug libfortran/39176] " jv244 at cam dot ac dot uk
2009-02-13 11:49 ` jv244 at cam dot ac dot uk
2009-02-13 11:51 ` jakub at gcc dot gnu dot org
2009-02-13 12:20 ` jv244 at cam dot ac dot uk
2009-02-13 12:35 ` jakub at gcc dot gnu dot org
2009-02-13 14:01 ` [Bug libgomp/39176] " jv244 at cam dot ac dot uk
2009-02-13 20:18 ` pinskia at gcc dot gnu dot org
2009-02-13 21:00 ` jv244 at cam dot ac dot uk
2009-02-13 21:10 ` jakub at gcc dot gnu dot org
     [not found] <bug-39176-4@http.gcc.gnu.org/bugzilla/>
2024-04-08 20:07 ` pinskia at gcc dot gnu.org
2024-04-08 20:08 ` hjl.tools at gmail dot com
2024-04-08 20:14 ` hjl.tools at gmail dot com
2024-04-08 20:16 ` pinskia at gcc dot gnu.org
2024-04-08 20:17 ` pinskia at gcc dot gnu.org

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).