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# Linux Debugging GTK
## Making warnings fatal
See
[Running GLib Applications](http://developer.gnome.org/glib/stable/glib-running.html)
for notes on how to make GTK warnings fatal.
## Using GTK Debug packages
sudo apt-get install libgtk2.0-0-dbg
Make sure that you're building a binary that matches your architecture (e.g.
64-bit on a 64-bit machine), and there you go.
### Source
You'll likely want to get the source for gtk too so that you can step through
it. You can tell gdb that you've downloaded the source to your system's GTK by
doing:
```shell
$ cd /my/dir
$ apt-get source libgtk2.0-0
$ gdb ...
(gdb) set substitute-path /build/buildd /my/dir
```
NOTE: I tried debugging pango in a similar manner, but for some reason gdb
didn't pick up the symbols from the symbols from the `-dbg` package. I ended up
building from source and setting my `LD_LIBRARY_PATH`.
See [linux_building_debug_gtk.md](linux_building_debug_gtk.md) for more on how
to build your own debug version of GTK.
## Parasite
http://chipx86.github.com/gtkparasite/ is great. Go check out the site for more
about it.
Install it with
sudo apt-get install gtkparasite
And then run Chrome with
GTK_MODULES=gtkparasite ./out/Debug/chrome
### ghardy
If you're within the Google network on ghardy, which is too old to include
gtkparasite, you can do:
scp bunny.sfo:/usr/lib/gtk-2.0/modules/libgtkparasite.so /tmp
sudo cp /tmp/libgtkparasite.so /usr/lib/gtk-2.0/modules/libgtkparasite.so
## GDK_DEBUG
Use `GDK_DEBUG=nograbs` to run GTK+ without grabs. This is useful for gdb
sessions.
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