Re: Problem with gdb/mi under hp-ux 11.11, gdb 6.7.1

Thomas Mittelstaedt
2007-11-30T12:45:39Z

Hallo,

Here is a stack trace

I also filed a bug report, it has identification mi/2374.

#7 0x64e44 in unpack_long (type=0x7b041f20, valaddr=0x7b0416b8
"\341yd\225{\003\006\230z\271\2468") at
/localbuild/source/gdb-6.7.1/gdb/value.c:1097
(gdb) do
#6 0xc0161bcc in _U_Qfcnvfxt_quad_to_dbl+0xb4 () from /usr/lib/libc.2
(gdb)
#5 0xc015fd68 in _U_force_trap+0 () from /usr/lib/libc.2
(gdb)
#4 <signal handler called>
(gdb) do
#3 0x8b9bc in handle_sigfpe (sig=8) at
/localbuild/source/gdb-6.7.1/gdb/event-top.c:1096
(gdb) bt
#0 0xc02012e0 in _sigvector+0x10 () from /usr/lib/libc.2
#1 0xc0207d3c in signalvector+0xac () from /usr/lib/libc.2
#2 0xc0207c48 in signal+0xa0 () from /usr/lib/libc.2
#3 0x8b9bc in handle_sigfpe (sig=8) at
/localbuild/source/gdb-6.7.1/gdb/event-top.c:1096
#4 <signal handler called>
#5 0xc015fd68 in _U_force_trap+0 () from /usr/lib/libc.2
#6 0xc0161bcc in _U_Qfcnvfxt_quad_to_dbl+0xb4 () from /usr/lib/libc.2
#7 0x64e44 in unpack_long (type=0x7b041f20, valaddr=0x7b0416b8
"\341yd\225{\003\006\230z\271\2468") at
/localbuild/source/gdb-6.7.1/gdb/value.c:1097
#8 0x76634 in print_scalar_formatted (valaddr=0x7b0416b8,
type=0x4003bca8, format=120, size=0, stream=0x400739c0) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/printcmd.c:354
#9 0x18d37c in c_val_print (type=0x40084c20, valaddr=0x240800 "e",
embedded_offset=1073762000, address=0, stream=0x400739c0, format=120,
deref_ref=1, recurse=0, pretty=Val_no_prettyprint) at
/localbuild/source/gdb-6.7.1/gdb/c-valprint.c:469
#10 0x7338c in val_print (type=0x7b041928, valaddr=0x7b041838 "",
embedded_offset=42, address=2235956, stream=0x400739c0, format=120,
deref_ref=1, recurse=0, pretty=Val_pretty_default) at
/localbuild/source/gdb-6.7.1/gdb/valprint.c:230
#11 0x161b80 in get_register (regnum=2063865528, format=2063865528) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/mi/mi-main.c:569
#12 0x161f14 in mi_cmd_data_list_register_values (command=0x7b027b78 "",
argv=0x2, argc=121) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/mi/mi-main.c:484
#13 0x16066c in captured_mi_execute_command (uiout=0x0, data=0x7b026f38)
at /localbuild/source/gdb-6.7.1/gdb/.././gdb/mi/mi-main.c:1319
#14 0x3dfac in catch_exception (uiout=0x40038aa8, func=0x7b030690,
func_args=0x7b026f38, mask=1073861092) at
/localbuild/source/gdb-6.7.1/gdb/exceptions.c:467
#15 0x15ff9c in mi_execute_command (cmd=0x7b030958 "",
from_tty=2063795856) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/mi/mi-main.c:1243
#16 0xddd2c in mi_execute_command_wrapper (cmd=0x7b026f38 "") at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/mi/mi-interp.c:283
#17 0x8bff8 in gdb_readline2 (client_data=0x40038aa8) at
/localbuild/source/gdb-6.7.1/gdb/event-top.c:885
#18 0x8c190 in stdin_event_handler (error=2063796560,
client_data=0x40073cb4) at /localbuild/source/gdb-6.7.1/gdb/event-top.c:431
#19 0x8afb4 in handle_file_event (event_file_desc=0) at
/localbuild/source/gdb-6.7.1/gdb/event-loop.c:728
#20 0x8a0d8 in process_event () at
/localbuild/source/gdb-6.7.1/gdb/event-loop.c:341
#21 0x8abc8 in gdb_do_one_event (data=0x4006ab98) at
/localbuild/source/gdb-6.7.1/gdb/event-loop.c:378
#22 0x3dda8 in catch_errors (func=0x7b032e90, func_args=0x0,
errstring=0x0, mask=1074170312) at
/localbuild/source/gdb-6.7.1/gdb/exceptions.c:513
#23 0x8aa3c in start_event_loop () at
/localbuild/source/gdb-6.7.1/gdb/event-loop.c:404
#24 0xddff4 in mi_command_loop (mi_version=2063806096) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/mi/mi-interp.c:351
#25 0x3e3d8 in current_interp_command_loop () at
/localbuild/source/gdb-6.7.1/gdb/interps.c:273
#26 0x2a7dc in captured_command_loop (data=0x400689d0) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/main.c:99
#27 0x3dda8 in catch_errors (func=0, func_args=0x0, errstring=0x0,
mask=0) at /localbuild/source/gdb-6.7.1/gdb/exceptions.c:513
#28 0x2a0b0 in captured_main (data=0x40038aa8) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/main.c:870
#29 0x3dda8 in catch_errors (func=0, func_args=0x0, errstring=0x1f1998
"console", mask=0) at /localbuild/source/gdb-6.7.1/gdb/exceptions.c:513
#30 0x296f0 in gdb_main (args=0x0) at
/localbuild/source/gdb-6.7.1/gdb/.././gdb/main.c:879
#31 0x296b0 in main (argc=0, argv=0x0) at
/localbuild/source/gdb-6.7.1/gdb/gdb.c:33
(gdb) f 7
#7 0x64e44 in unpack_long (type=0x7b041f20, valaddr=0x7b0416b8
"\341yd\225{\003\006\230z\271\2468") at
/localbuild/source/gdb-6.7.1/gdb/value.c:1097
(gdb) p valaddr
$15 = (unsigned char *) 0x7b0416b8 "\341yd\225{\003\006\230z\271\2468"
(gdb) do

Thomas Mittelstaedt schrieb:
> Hallo,
>
> Some more investigation shows that the forked gdb runs at about 90+ %
> CPU and the truss
> output shows that floating point exceptions occur.
>
> sigvec(SIGFPE, 0x7b042560,
> 0x7b042570) = 0
> Received signal 8, SIGFPE, in user mode, [caught], partial siginfo
> Siginfo: si_code: I_EXCEP, faulting address: 0xc015fd6b, si_errno: 0
> PC: 0xc015fd6b, instruction: 0x27c11200
> sigvec(SIGFPE, 0x7b042560,
> 0x7b042570) = 0
> Received signal 8, SIGFPE, in user mode, [caught], partial siginfo
> Siginfo: si_code: I_EXCEP, faulting address: 0xc015fd6b, si_errno: 0
> PC: 0xc015fd6b, instruction: 0x27c11200
> sigvec(SIGFPE, 0x7b042560,
> 0x7b042570) = 0
> Received signal 8, SIGFPE, in user mode, [caught], partial siginfo
> Siginfo: si_code: I_EXCEP, faulting address: 0xc015fd6b, si_errno: 0
> PC: 0xc015fd6b, instruction: 0x27c11200
>
>
> Thomas Mittelstaedt schrieb:
>
>> Hallo,
>>
>> I am trying to get ccdebug <http://ccdebug.sourceforge.net/>, a Qt-based
>> gdb frontend to work on hp-ux. It works without problems on linux. On
>> hp-ux, though, and also on aix,
>> I am having trouble when I hit the key to show the register values. The
>> funny thing is, sometimes it works, but mostly it does not, i.e. there is no
>> response from the forked gdb, because otherwise I would see it in the log.
>> The following command is sent to gdb, but no response arrives.
>>
>> ^[[46mSent: -data-list-register-values x ^[[0m
>>
>> What can this be and how can I test this?
>>
>> Also, when I try to debug ccdebug with gdb directly, I get a ttrace:
>> Protocol error.
>> Attaching to the running process also does not work.
>>
>> tmstaedt@buildhp3$ gdb ../ccdebug
>> GNU gdb 6.7.1
>> Copyright (C) 2007 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 "hppa2.0w-hp-hpux11.11"...
>> (gdb) r
>> Starting program:
>> /localbuild/source/V9_UNICODE_RESTRUCTURE/3rdparty/ccdebug/ccdebug
>> warning: The shared libraries were not privately mapped; setting a
>> breakpoint in a shared library will not work until you rerun the program.
>>
>> [New process 3561, lwp 1296829]
>> Using /opt/gcc-4.1/32/bin/gdb
>> Detaching after fork from child process 3567.
>> [Switching to process 3561, lwp 1296829]
>> 0x7affe5d4 in _fork_sys () from /usr/lib/libc.2
>> ttrace: Protocol error.
>>
>>
>>
>> gcc -v
>> Reading specs from
>> /opt/gcc/gcc-4.1/32/lib/gcc/hppa2.0w-hp-hpux11.11/4.1.1/specs
>> Target: hppa2.0w-hp-hpux11.11
>> Configured with: ../gcc-4.1.1/configure --prefix=/opt/gcc-4.1-32
>> --enable-version-specific-runtime-libs --enable-static --enable-shared
>> --with-gnu-as --with-as=/opt/gcc-4.1-32/bin/as --enable-threads=posix
>> --disable-nls --enable-languages=c,c++
>> Thread model: posix
>> gcc version 4.1.1
>>
>>
>> Thanks in advance for help,
>> thomas
>>
>>
>>