https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95104
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|FIXED |---
Status|RESOLVED |REOPENED
CC| |ro at gcc dot gnu.org
--- Comment #13 from Rainer Orth <ro at gcc dot gnu.org> ---
The new testcase FAILs on (at least): Solaris (both sparc and x86):
+FAIL: gfortran.dg/pr95104.f90 -O0 execution test
+FAIL: gfortran.dg/pr95104.f90 -O1 execution test
+FAIL: gfortran.dg/pr95104.f90 -O2 execution test
+FAIL: gfortran.dg/pr95104.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
+FAIL: gfortran.dg/pr95104.f90 -O3 -g execution test
+FAIL: gfortran.dg/pr95104.f90 -Os execution test
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
After recompiling libgfortran with -g3 -O0, I see
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xfec554a8 in pthread_mutex_unlock () from /lib/libc.so.1
(gdb) where
#0 0xfec554a8 in pthread_mutex_unlock () from /lib/libc.so.1
#1 0xff1287bc in __gthread_mutex_unlock (__mutex=0xc8)
at ../libgcc/gthr-default.h:779
#2 0xff12a178 in _gfortrani_unlock_unit (u=0x0)
at /vol/gcc/src/hg/master/local/libgfortran/io/unit.c:771
#3 0xff127ffc in _gfortran_st_wait_async (wtp=0xffbfe750)
at /vol/gcc/src/hg/master/local/libgfortran/io/transfer.c:4511
#4 0x00010eac in test ()
at /vol/gcc/src/hg/master/local/gcc/testsuite/gfortran.dg/pr95104.f90:5
#5 0x00010f40 in main (argc=1, argv=0xffbfe992)
at /vol/gcc/src/hg/master/local/gcc/testsuite/gfortran.dg/pr95104.f90:8
#6 0x00010c74 in _start ()
#3 0xff127ffc in _gfortran_st_wait_async (wtp=0xffbfe750)
at /vol/gcc/src/hg/master/local/libgfortran/io/transfer.c:4511
4511 unlock_unit (u);
(gdb) p u
$2 = (gfc_unit *) 0x0
Either the unlock_unit needs to be guarded by if (u) or moved into the
if (ASYNC_IO && u ...) check.
