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-<div class="chapter">
-<div class="titlepage"><div><div><h2 class="title">
-<a name="tools-refdb"></a>Debugging reference count problems</h2></div></div></div>
-<p>
- The reference counting scheme used by GObject does solve quite
- a few memory management problems but also introduces new sources of bugs.
- In large applications, finding the exact spot where the reference count
- of an Object is not properly handled can be very difficult. Hopefully,
- there exist a tool named <a class="ulink" href="http://refdbg.sf.net/" target="_top">refdbg</a>
- which can be used to automate the task of tracking down the location
- of invalid code with regard to reference counting. This application
- intercepts the reference counting calls and tries to detect invalid behavior.
- It supports a filter-rule mechanism to let you trace only the objects you are
- interested in and it can be used together with GDB.
- </p>
-<p>
-
- Note that if GObject has been compiled with <code class="option">--enable-debug=yes</code>,
- it exports a trap variable
- </p>
-<pre class="programlisting">
-static volatile GObject *g_trap_object_ref;
- </pre>
-<p>
- If set to a non-NULL value, <a class="link" href="gobject-The-Base-Object-Type.html#g-object-ref" title="g_object_ref ()">g_object_ref</a>()
- and <a class="link" href="gobject-The-Base-Object-Type.html#g-object-unref" title="g_object_unref ()">g_object_unref</a>() will be intercepted
- when called with that value.
- </p>
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