Re: ddd crash on Red Hat Linux 7.4

Hi Michael,

Well that's interesting ..... use a debugger to debug a debugger :-)

Here's what I get but I don't think it will help ex it crashes in X


Program received signal SIGSEGV, Segmentation fault.
0x00007ffff724a1a9 in _XtWindowedAncestor () from /lib64/libXt.so.6
(gdb) bt full

#0  0x00007ffff724a1a9 in _XtWindowedAncestor () from /lib64/libXt.so.6
No symbol table info available.
#1  0x00007ffff724ab31 in XtWindowOfObject () from /lib64/libXt.so.6
No symbol table info available.
#2  0x00007ffff7aa9808 in _XmEventDispatcher () from /lib64/libXm.so.4
No symbol table info available.
#3  0x00007ffff7243a39 in XtDispatchEvent () from /lib64/libXt.so.6
No symbol table info available.
#4  0x00005555555ac5aa in process_next_event() ()
No symbol table info available.
#5  0x00005555556669e5 in ddd_main_loop() ()


Again, thank you so much for helping me!

Thanks,

Zaiwen


On 11/21/17 17:13, Michael Eager wrote:
> Hi Zaiwen --
>
> Third thing to try is to run DDD under GDB, repeat your test, and see 
> where (or if) it is crashing.
>
> If it crashes, then you can get a backtrace in GDB.  That might give a 
> hint about why it is crashing and possibly answer your question about 
> your configuration.  (I see a variety of odd behaviors with DDD on 
> CentOS 7.4, the most common being that it stalls waiting for GDB.)
>
> Hope this helps.  I've done very little internal work with DDD and 
> most of the problems seem to be in the Motif interface, which is (to 
> me, at least) unclear.
>
>
> On 11/21/2017 12:46 PM, Zaiwen Gong wrote:
>> Hi Michael,
>>
>> Thank you very much for the reply.
>>
>> First, I tried to to do the same operation without DDD, using GDB 
>> from the command line:
>>
>>     #gdb ./simpleProg
>>     GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-100.el7
>>     Copyright (C) 2013 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 "x86_64-redhat-linux-gnu".
>>     For bug reporting instructions, please see:
>>     <http://www.gnu.org/software/gdb/bugs/>...
>>     Reading symbols from /cfs/ad/binello/test/simpleProg...done.
>>     (gdb) br main
>>     Breakpoint 1 at 0x4005f5: file simpleProg.cxx, line 5.
>>     (gdb) run
>>     Starting program: /cfs/ad/binello/test/./simpleProg
>>     in cshrc
>>     xterm-256color
>>     C
>>
>>     Breakpoint 1, main () at simpleProg.cxx:5
>>     5         int x = 1;
>>     Missing separate debuginfos, use: debuginfo-install
>>     glibc-2.17-196.el7.x86_64 libgcc-4.8.5-16.el7.x86_64
>>     libstdc++-4.8.5-16.el7.x86_64
>>     (gdb) p x
>>     $1 = 0
>>
>> so far so good, but the action next (type anything into the debugger 
>> at the gdb prompt) is a GUI action and I can't do it on the command 
>> line.
>>
>> Second, I  tried to remove my ~/.ddd directory, but same problem.
>>
>> I am glad you confirmed that you are using ddd-3.3.12 on CentOS 7.4 
>> without crashing. There may be something wrong in my configuration?
>>
>>
>> Thanks,
>>
>> Zaiwen
>>
>>
>> On 11/21/17 14:58, Michael Eager wrote:
>>> Hi Zaiwen --
>>>
>>> First, try to do the same operation without DDD, using GDB from the 
>>> command line.  That will help decide whether this is a DDD problem 
>>> or GDB problem.
>>>
>>> Second, remove your ~/.ddd directory and try re-running your test.
>>>
>>> If it is any consolation, I run ddd-3.3.12 on CentOS 7.4 without 
>>> crashing.
>>>
>>> On 11/21/2017 10:05 AM, Zaiwen Gong wrote:
>>>> Hi,
>>>>
>>>> I am using ddd-3.3.12-20.el7.x86_64 on Red Hat Linux 7.4 
>>>> (3.10.0-693.2.1.el7.x86_64).
>>>>
>>>> I would like to know if it is supported?
>>>>
>>>> Below is a simple program. It will crash if in ddd I right click on 
>>>> x and select print and then later try to type anything into the 
>>>> debugger at the gdb prompt
>>>>
>>>>      #include <stdio.h>
>>>>
>>>>      int main ()
>>>>      {
>>>>          int x = 1;
>>>>          printf ("%d",x );
>>>>
>>>>          return 0;
>>>>        }
>>>>
>>>> #To build ....
>>>> #g++ -g simpleProg.cxx -o simpleProg
>>>>
>>>> Has anyone been using ddd in Red Hat Linux 7.4 and encountered the 
>>>> same crash?
>>>>
>>>> I have opened an issue here:
>>>>
>>>>   * https://savannah.gnu.org/support/index.php?109420
>>>>
>>>> Any reply will be highly appreciated.
>>>>
>>>> Thanks,
>>>>
>>>> Zaiwen
>>>>
>>>> -- 
>>>> Zaiwen Gong
>>>> System Administration Group
>>>> Controls Systems Section
>>>> Collider-Accelerator Department
>>>> Brookhaven National Laboratory
>>>> Telephone: (631)344-2938
>>>> email:[email protected]
>>>
>>
>