GDB 5.3.91, Redhat Linux 7.1, gcc 2.95.3, g++ 2.95.3, C++ and Qt

[akumar]

>Category:       gdb
>Synopsis:       GDB 5.3.91, Redhat Linux 7.1, gcc 2.95.3, g++ 2.95.3, C++ and 
>Qt
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Class:          sw-bug
>Submitter-Id:   net
>Originator:     address@hidden
>Release:        GNU gdb 5.3, GNU gdb 5.3.91
>Environment:
Linux 7.1 (2.4.2-2smp), gcc 2.95.3, g++ 2.95.3, GDB was configured as 
"i686-pc-linux-gnu"
>Description:
GDB seems to have some problems working with Qt applications on Linux 
platform(It works perfectly on Sun Solaris) when compiled with shared 
objects(It works perfectly when compiled with static libraries i.e., .a files). 
It gets killed whenever I try to debug a Qt application irrespective of the 
size of the application. The application doesn't have any problem(I'm able to 
run that stand alone).  A detailed report of the bug is given in the next 
paragraph.  I'm sorry that I cannot send the source files because of the 
confidentiality I am supposed to maintain, but I've found that gdb crashes with 
any Qt application on Linux when compiled with shared objects. So, you can try 
with your own test applications.  I'm attaching a statically compiled Scribble 
application(source code is available with Qt software, its a sample program), 
but I don't think it will help since it doesn't seem to have any problems.

Description of bug : GDB gets killed whenever I try to
debug a Qt application that is compiled with shared objects. GDB does not even 
seem to execute the first statement in main function. I checked it by putting a 
break point at main, but it didn't help. GDB does some operation after I give 
the command 'run' and after a while, it gives the command line output 'Killed' 
and exits. I first tried with the GDB available with Redhat Linux7.1 CD 
(version of GDB is 5.0 I suppose) and then downloaded and compiled the
version 5.3 from www.gnu.org and version 5.3.91 from 
ftp://sources.redhat.com/pub/gdb/snapshots/branch/gdb-5.3.91.tar.bz2. None 
helped.
>How-To-Repeat:
Compile any Qt application with -g option(for debugging) with shared objects(of 
qt and other libraries) and try to debug it with gdb.  After some time, gdb 
prints the message "Killed" and gets killed.
>Fix:

>Unformatted: