I tried to use gfortran together with a library that uses pthreads. This caused
a segfault. Note that my own code didn't directly call pthreads nor use openmp
(this is trunk, not gomp branch).
~/src/benchmark/matmul-bench% gfortran -g -O0 matmul-bench.f90 -o mbgfc-goto
-lgoto -lpthread
~/src/benchmark/matmul-bench% gdb ./mbgfc-goto
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This GDB was configured as "i486-linux-gnu"...Using host libthread_db library
"/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) b transfer.c:2159
No source file named transfer.c.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (transfer.c:2159) pending.
(gdb) r
Starting program: /home/joib/src/benchmark/matmul-bench/mbgfc-goto
[Thread debugging using libthread_db enabled]
[New Thread 1076887104 (LWP 30593)]
Breakpoint 2 at 0x40188b98: file ../../../trunk/libgfortran/io/transfer.c, line
2159.
Pending breakpoint "transfer.c:2159" resolved
Single precision matrix multiplication test
[Switching to Thread 1076887104 (LWP 30593)]
Breakpoint 2, *_gfortran_st_write_done (dtp=0xbfa1665c)
at ../../../trunk/libgfortran/io/transfer.c:2159
2159 unlock_unit (dtp->u.p.current_unit);
(gdb) step
*_gfortrani_unlock_unit (u=0x804f118) at
../../../trunk/libgfortran/io/unit.c:555
555 {
(gdb)
538 gthr-posix.h: No such file or directory.
in gthr-posix.h
(gdb)
539 in gthr-posix.h
(gdb)
557 }
(gdb)
*_gfortrani_unlock_unit (u=0xbfa1665c) at gthr-posix.h:539
539 gthr-posix.h: No such file or directory.
in gthr-posix.h
(gdb)
0x402ed223 in in6addr_any () from /lib/tls/i686/cmov/libc.so.6
(gdb)
Single stepping until exit from function in6addr_any,
which has no line number information.
Program received signal SIGSEGV, Segmentation fault.
0x402ed231 in in6addr_any () from /lib/tls/i686/cmov/libc.so.6
--
Summary: libgfortran/io/transfer.c:2159 unlock_unit causes
segfault
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jb at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25377
