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From: "dfranke at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/32550] openmp: COPYPRIVATE of pointer variables fails
Date: Fri, 29 Jun 2007 21:00:00 -0000 [thread overview]
Message-ID: <20070629210043.11254.qmail@sourceware.org> (raw)
In-Reply-To: <bug-32550-14710@http.gcc.gnu.org/bugzilla/>
------- Comment #1 from dfranke at gcc dot gnu dot org 2007-06-29 21:00 -------
Bill, thanks for your report! Here's a slightly simplified testcase:
$> cat pr32550.f90
integer, pointer, save :: ptr
integer, target :: targ
!$omp threadprivate(ptr)
!$omp parallel shared(targ)
!$omp single
ptr => targ
!$omp end single copyprivate(ptr)
!$omp end parallel
END
The testcase compiles, but crashes on execution (SIGSEGV). If the
COPYPRIVATE-clause or the pointer/target attributes are removed, the resulting
binary does not crash.
Output from gdb is not very helpful, but valgrind gives:
==32677== Thread 2:
==32677== Invalid write of size 4
==32677== at 0x80486FE: MAIN__.omp_fn.0 (pr32550.f90:9)
==32677== by 0x40FAFFC: gomp_thread_start (team.c:108)
==32677== by 0x410F2C0: start_thread (in /lib/libpthread-2.5.so)
==32677== by 0x41D8FAD: clone (in /lib/libc-2.5.so)
==32677== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==32677==
==32677== Process terminating with default action of signal 11 (SIGSEGV)
==32677== Access not within mapped region at address 0x0
==32677== at 0x80486FE: MAIN__.omp_fn.0 (pr32550.f90:9)
==32677== by 0x40FAFFC: gomp_thread_start (team.c:108)
==32677== by 0x410F2C0: start_thread (in /lib/libpthread-2.5.so)
==32677== by 0x41D8FAD: clone (in /lib/libc-2.5.so)
Adding Jakub as CC.
--
dfranke at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dfranke at gcc dot gnu dot
| |org, jakub at gcc dot gnu
| |dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
GCC build triplet|x86_64-suse-linux |
GCC host triplet|x86_64-suse-linux |
GCC target triplet|x86_64-suse-linux |
Keywords| |openmp
Known to fail| |4.2.1 4.3.0
Last reconfirmed|0000-00-00 00:00:00 |2007-06-29 21:00:42
date| |
Summary|THE COPYPRIVATE CLAUSE FAILS|openmp: COPYPRIVATE of
|TO COPY THE PTR AT THE END |pointer variables fails
|OF A 'SINGLE' CONSTRUCT |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32550
next prev parent reply other threads:[~2007-06-29 21:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-29 18:46 [Bug fortran/32550] New: THE COPYPRIVATE CLAUSE FAILS TO COPY THE PTR AT THE END OF A 'SINGLE' CONSTRUCT longb at cray dot com
2007-06-29 21:00 ` dfranke at gcc dot gnu dot org [this message]
2007-07-02 11:17 ` [Bug fortran/32550] openmp: COPYPRIVATE of pointer variables fails jakub at gcc dot gnu dot org
2007-07-12 12:17 ` jakub at gcc dot gnu dot org
2007-07-12 12:21 ` jakub at gcc dot gnu dot org
2007-09-17 22:38 ` jakub at gcc dot gnu dot org
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