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Re: RFA: test GDB's ability to kill threaded programs that die messily


Jim Blandy wrote:
> 
> Michael Snyder <msnyder@redhat.com> writes:
> > Jim Blandy wrote:
> > > Michael Snyder <msnyder@redhat.com> writes:
> > > > Jim Blandy wrote:
> > > > >
> > > > > This tests the bug reported in gdb/568.
> > > > >
> > > > > 2002-06-12  Jim Blandy  <jimb@redhat.com>
> > > > >
> > > > >         * gdb.threads/killed.exp, gdb.threads/killed.c: New test.
> > > >
> > > > Why run it only on linux?  It might pass perfectly well on other
> > > > systems -- and if not, it's a bug there too, which we might want
> > > > to know.
> > >
> > > Definitely.  I thought the link process (-lpthread) was linux-only.
> > > Can we write portable code in the test suite that builds
> > > multi-threaded programs?
> >
> > We already have -- see pthread.exp
> 
> Here's a revision of the patch, which uses the gdb_compile_pthreads
> function introduced by the last patch I posted ("RFA: abstract out
> thread compilation code").  It no longer refuses to run on anything
> but Linux.

Belatedly approved.  Check it in?

> 
> 2002-06-12  Jim Blandy  <jimb@redhat.com>
> 
>         * gdb.threads/killed.exp, gdb.threads/killed.c: New test.
> 
> Index: gdb/testsuite/gdb.threads/killed.exp
> ===================================================================
> RCS file: gdb/testsuite/gdb.threads/killed.exp
> diff -N gdb/testsuite/gdb.threads/killed.exp
> *** gdb/testsuite/gdb.threads/killed.exp        1 Jan 1970 00:00:00 -0000
> --- gdb/testsuite/gdb.threads/killed.exp        13 Jun 2002 17:46:54 -0000
> ***************
> *** 0 ****
> --- 1,97 ----
> + # Copyright 2002 Free Software Foundation, Inc.
> +
> + # This program is free software; you can redistribute it and/or modify
> + # it under the terms of the GNU General Public License as published by
> + # the Free Software Foundation; either version 2 of the License, or
> + # (at your option) any later version.
> + #
> + # This program is distributed in the hope that it will be useful,
> + # but WITHOUT ANY WARRANTY; without even the implied warranty of
> + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + # GNU General Public License for more details.
> + #
> + # You should have received a copy of the GNU General Public License
> + # along with this program; if not, write to the Free Software
> + # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> +
> + # Please email any bugs, comments, and/or additions to this file to:
> + # bug-gdb@gnu.org
> +
> + # This is a regression test for gdb/568 in the sources.redhat.com
> + # GNATS database.  As of early June 2002, GDB could get sort of wedged
> + # debugging the program `killed.c':
> + #
> + # $ $D6/gdb/gdb -nw killed
> + # GNU gdb 2002-06-11-cvs
> + # Copyright 2002 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 "i686-pc-linux-gnu"...
> + # (gdb) run
> + # Starting program: /home/jimb/morganstanley/play/killed
> + # [New Thread 1024 (LWP 6487)]
> + # [New Thread 2049 (LWP 6488)]
> + # [New Thread 1026 (LWP 6489)]
> + # Cannot find user-level thread for LWP 6487: generic error
> + # (gdb) quit
> + # The program is running.  Exit anyway? (y or n) y
> + # Cannot find thread 2049: generic error
> + # (gdb) kill
> + # Kill the program being debugged? (y or n) y
> + # Cannot find thread 2049: generic error
> + # (gdb) The program is running.  Exit anyway? (y or n) y
> + # Cannot find thread 2049: generic error
> + # (gdb)
> + # [7]+  Stopped                 $D6/gdb/gdb -nw killed
> + # $ kill %7
> + #
> + # [7]+  Stopped                 $D6/gdb/gdb -nw killed
> + # $ kill -9 %7
> + #
> + # [7]+  Stopped                 $D6/gdb/gdb -nw killed
> + # $
> + # [7]+  Killed                  $D6/gdb/gdb -nw killed
> + # $
> +
> + if $tracelevel then {
> +       strace $tracelevel
> + }
> +
> + set prms_id 0
> + set bug_id 0
> +
> + set testfile "killed"
> + set srcfile ${testfile}.c
> + set binfile ${objdir}/${subdir}/${testfile}
> +
> + if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}/${subdir}"]] != "" } {
> +     gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
> + }
> +
> +
> + gdb_start
> + gdb_reinitialize_dir $srcdir/$subdir
> + gdb_load ${binfile}
> +
> + gdb_test "run" "" "run program to completion"
> +
> + # Try to quit.
> + send_gdb "quit\n"
> + gdb_expect {
> +     -re "The program is running.  Exit anyway\\? \\(y or n\\) $" {
> +         send_gdb "y\n"
> +         exp_continue
> +     }
> +     eof {
> +         pass "GDB exits after multi-threaded program exits messily"
> +     }
> +     -re "Cannot find thread ${decimal}: generic error\[\r\n\]*$gdb_prompt $" {
> +         # setup_kfail "gdb/568"
> +         fail "GDB exits after multi-threaded program exits messily (gdb/568)"
> +     }
> +     timeout {
> +         fail "GDB exits after multi-threaded program exits messily (timeout)"
> +     }
> + }
> Index: gdb/testsuite/gdb.threads/killed.c
> ===================================================================
> RCS file: gdb/testsuite/gdb.threads/killed.c
> diff -N gdb/testsuite/gdb.threads/killed.c
> *** gdb/testsuite/gdb.threads/killed.c  1 Jan 1970 00:00:00 -0000
> --- gdb/testsuite/gdb.threads/killed.c  13 Jun 2002 17:46:54 -0000
> ***************
> *** 0 ****
> --- 1,24 ----
> + #include <sys/types.h>
> + #include <signal.h>
> + #include <pthread.h>
> + #include <stdio.h>
> +
> + int pid;
> +
> + void *
> + child_func (void *dummy)
> + {
> +   kill (pid, SIGKILL);
> +   exit (1);
> + }
> +
> + int
> + main ()
> + {
> +   pthread_t child;
> +
> +   pid = getpid ();
> +   pthread_create (&child, 0, child_func, 0);
> +   for (;;)
> +     sleep (10000);
> + }


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