Red Hat Bugzilla – Bug 586478
GDB hangs when setting a breakpoint on a library not yet loaded
Last modified: 2011-02-02 15:38:29 EST
Created attachment 409530 [details]
First call stack
The problem happened when I was trying to debug Nemiver, using gdb-7.0.1-44.fc12.x86_64 on Fedora 12. I tried to write a little reproducer using dlopen/dlsym, but it worked fine in that case.
So here is how you can get, compile, install Nemiver and reproduce the issue:
yum install yum-utils
git clone git://git.gnome.org/git/nemiver nemiver.git
sudo make install
gdb --args nemiver fooprog
Trying to set the second breakpoint hangs GDB. I debugged GDB a bit and I could get some call stacks that are attached below.
Created attachment 409531 [details]
Second call stack taken after a longer hang/spinning period
I forgot to say that GDB hangs taking 100% CPU.
Arg, I made a little mistake in the steps to reproduce. In the end I said:
It should rather be:
I am having trouble reproducing this, but I also cant match the line numbers from the stack trace to the source from the rpm. Is it possible that you have another version of gdb interfering with the system installed one ?
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(In reply to comment #1)
> Created attachment 409531 [details]
> Second call stack taken after a longer hang/spinning period
> I forgot to say that GDB hangs taking 100% CPU.
Based on the stack trace, I would say that this has been fixed a
long time ago. In the 7.0 time frame there was a bug where some
kinds of namespace lookup took a lot of CPU. This was fixed in
I am closing this on that basis.
If you can still reproduce it with a newer gdb, please reopen
and I will take a look.