Re: GDB 5.1 on 64-bit hpux-11 hangs running 32-bit program

[J. Cone]

Hello Elena,

Thank you.  It no longer hangs.

My symptoms are now a bus error either running a program in the debugger, 
or attaching the debugger.
Using an older debugger (which goes but can't read the symbols in my 
GCC-3.0.3 program :-(  ),
the top few lines of the back-trace are.

Program received signal SIGBUS, Bus error.
0x92de8 in add_thread (ptid={pid = -1774190241, lwp = 402653185,
      tid = 1426915583}) at thread.c:125
125     {
(top-gdb) bt
#0  0x92de8 in add_thread (ptid={pid = -1774190241, lwp = 402653185,
      tid = 1426915583}) at thread.c:125
#1  0xa1690 in child_acknowledge_created_inferior (pid=29475)
    at infttrace.c:3126
#2  0x9f150 in ptrace_him (pid=29475) at inftarg.c:444
#3  0xed154 in fork_inferior (exec_file_arg=0x7323 "address@hidden",
    allargs=0x400390e0 "", env=0x40039100,
    traceme_fun=0x40016172 <_exit_dummy_decl+5330>,
    init_trace_fun=0x4001617a <_exit_dummy_decl+5338>,
    pre_trace_fun=0x40016182 <_exit_dummy_decl+5346>, shell_file_arg=0x0)
    at fork-child.c:363

ptid is clearly insane, and looking down the stack, there seems to be a 
type conflict
where the caller's data is sane but a completely different shape.

(top-gdb) up
#1  0xa1690 in child_acknowledge_created_inferior (pid=29475)
    at infttrace.c:3126
3126      add_thread (pid);             /* in thread.c */
(top-gdb) print pid
$2 = 29475
(top-gdb) shell ps -ef | fgrep gdb
smf_oper 29416  3418  0 19:17:33 pts/ta    0:00 gdb2 bin/smsMaster.jcone
    root 29456 29177  1 19:18:22 pts/tb    0:01 /opt/gdb/bin/gdb ./gdb 29416
smf_oper 29475 29416  0 19:18:42 pts/ta    0:00 gdb2 bin/smsMaster.jcone
    root 29497 29456  2 19:19:22 pts/tb    0:00 ksh -c ps -ef | fgrep gdb
(top-gdb)

If you know this problem too, I'd love a solution, but it's now 7pm local 
time, so I'm running away, so it's not urgent.

Thanks for your help,
James.

At 00:42 8/02/2002 -0500, Elena Zannoni wrote:
> J. Cone writes:
<snip>
 > The gdb hangs forever having produced:
>  >
>  > (gdb) run
>  > Starting program: /volA/IN/service_packages/SMS/bin/smsMaster.jcone
>
> Yes, known problem, vfork seems to not work properly on such platform.
> Try this patch (of course, adapt it to hpux1100.mh or whatever
> makefile fragment you end up using).
>
> Elena
<snip>