On Sun, Aug 12, 2012 at 12:59:35PM -0700, L Anderson wrote: >I trying to use gdb to debug a fortran program compiled with gfortran >but gdb inconsistently dies in the process. I have written a >small fortran program that exhibits the problem. > >The test program is: > ><code> > PROGRAM GDBDIES > >C PROGRAM TO SHOW GDB DIES DEBUGGING IT > IMPLICIT INTEGER (A-Z) > > A = 1 > > B = 2 > > IF (B.EQ.2) GOTO 20 > > C = 4 > > 20 D = 200 > > END ></code> > >I compiled it with: > >$ gfortran -g -o gdbdies gdbdies.f > >and ran it under gdb thusly: > >$ gdb gdbdies.exe >GNU gdb (GDB) 7.3.50.20111026-cvs (cygwin-special) >Copyright (C) 2011 Free Software Foundation, Inc. >License GPLv3+: GNU GPL version 3 or later ><http://gnu.org/licenses/gpl.html> >This is free software: you are free to change and redistribute it. >There is NO WARRANTY, to the extent permitted by law. Type "show copying" >and "show warranty" for details. >This GDB was configured as "i686-cygwin". >For bug reporting instructions, please see: ><http://www.gnu.org/software/gdb/bugs/>... >Reading symbols from /cygdrive/m/Langpak/src/gdbdies.exe...done. >(gdb) b 9 >Breakpoint 1 at 0x40117d: file gdbdies.f, line 9. >(gdb) run >Starting program: /cygdrive/m/Langpak/src/gdbdies.exe >[New Thread 4672.0x1630] >[New Thread 4672.0x15b8] > >Breakpoint 1, gdbdies () at gdbdies.f:9 >9 B = 2 >(gdb) n >10 C = 3 >(gdb) n >11 IF (C.EQ.3) GOTO 20 >(gdb) n <<<---here's where it goes out to lunch and never comes back. > >gdb doesn't consistently die in the same place--it seems to be related >to where the breakpoint is set. However, it seems to more consistently >die just after line 11 where the GOTO 20 is. > >My system is XP Pro SP3 with Cygwin DLL version 1.7.16 > > >Is this a bug in gdb or am I doing something wrong?
Are you running gdb under mintty or on a windows console. I've seen a problem with gdb running in a console which manifests the way you describe. Running under mintty usually works better. cgf -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
