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 <a name="Objfiles-In-Python"></a>
 <div class="header">
 <p>
 Next: <a href="Frames-In-Python.html#Frames-In-Python" accesskey="n" rel="next">Frames In Python</a>, Previous: <a href="Progspaces-In-Python.html#Progspaces-In-Python" accesskey="p" rel="prev">Progspaces In Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Objfiles-In-Python-1"></a>
 <h4 class="subsubsection">23.2.2.23 Objfiles In Python</h4>

 <a name="index-objfiles-in-python"></a>
 <a name="index-gdb_002eObjfile"></a>
 <a name="index-Objfile"></a>
 <p><small>GDB</small> loads symbols for an inferior from various
 symbol-containing files (see <a href="Files.html#Files">Files</a>).  These include the primary
 executable file, any shared libraries used by the inferior, and any
 separate debug info files (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>).
 <small>GDB</small> calls these symbol-containing files <em>objfiles</em>.
 </p>
 <p>The following objfile-related functions are available in the
 <code>gdb</code> module:
 </p>
 <a name="index-gdb_002ecurrent_005fobjfile"></a>
 <dl>
 <dt><a name="index-gdb_002ecurrent_005fobjfile-1"></a>Function: <strong>gdb.current_objfile</strong> <em>()</em></dt>
 <dd><p>When auto-loading a Python script (see <a href="Python-Auto_002dloading.html#Python-Auto_002dloading">Python Auto-loading</a>), <small>GDB</small>
 sets the &ldquo;current objfile&rdquo; to the corresponding objfile.  This
 function returns the current objfile.  If there is no current objfile,
 this function returns <code>None</code>.
 </p></dd></dl>

 <a name="index-gdb_002eobjfiles"></a>
 <dl>
 <dt><a name="index-gdb_002eobjfiles-1"></a>Function: <strong>gdb.objfiles</strong> <em>()</em></dt>
 <dd><p>Return a sequence of all the objfiles current known to <small>GDB</small>.
 See <a href="#Objfiles-In-Python">Objfiles In Python</a>.
 </p></dd></dl>

 <a name="index-gdb_002elookup_005fobjfile"></a>
 <dl>
 <dt><a name="index-gdb_002elookup_005fobjfile-1"></a>Function: <strong>gdb.lookup_objfile</strong> <em>(name <span class="roman">[</span>, by_build_id])</em></dt>
 <dd><p>Look up <var>name</var>, a file name or build ID, in the list of objfiles
 for the current program space (see <a href="Progspaces-In-Python.html#Progspaces-In-Python">Progspaces In Python</a>).
 If the objfile is not found throw the Python <code>ValueError</code> exception.
 </p>
 <p>If <var>name</var> is a relative file name, then it will match any
 source file name with the same trailing components.  For example, if
 <var>name</var> is &lsquo;<samp>gcc/expr.c</samp>&rsquo;, then it will match source file
 name of <samp>/build/trunk/gcc/expr.c</samp>, but not
 <samp>/build/trunk/libcpp/expr.c</samp> or <samp>/build/trunk/gcc/x-expr.c</samp>.
 </p>
 <p>If <var>by_build_id</var> is provided and is <code>True</code> then <var>name</var>
 is the build ID of the objfile.  Otherwise, <var>name</var> is a file name.
 This is supported only on some operating systems, notably those which use
 the ELF format for binary files and the <small>GNU</small> Binutils.  For more details
 about this feature, see the description of the <samp>--build-id</samp>
 command-line option in <a href="http://sourceware.org/binutils/docs/ld/Options.html#Options">Command Line Options</a> in <cite>The GNU Linker</cite>.
 </p></dd></dl>

 <p>Each objfile is represented by an instance of the <code>gdb.Objfile</code>
 class.
 </p>
 <dl>
 <dt><a name="index-Objfile_002efilename"></a>Variable: <strong>Objfile.filename</strong></dt>
 <dd><p>The file name of the objfile as a string, with symbolic links resolved.
 </p>
 <p>The value is <code>None</code> if the objfile is no longer valid.
 See the <code>gdb.Objfile.is_valid</code> method, described below.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002eusername"></a>Variable: <strong>Objfile.username</strong></dt>
 <dd><p>The file name of the objfile as specified by the user as a string.
 </p>
 <p>The value is <code>None</code> if the objfile is no longer valid.
 See the <code>gdb.Objfile.is_valid</code> method, described below.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002eowner"></a>Variable: <strong>Objfile.owner</strong></dt>
 <dd><p>For separate debug info objfiles this is the corresponding <code>gdb.Objfile</code>
 object that debug info is being provided for.
 Otherwise this is <code>None</code>.
 Separate debug info objfiles are added with the
 <code>gdb.Objfile.add_separate_debug_file</code> method, described below.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002ebuild_005fid"></a>Variable: <strong>Objfile.build_id</strong></dt>
 <dd><p>The build ID of the objfile as a string.
 If the objfile does not have a build ID then the value is <code>None</code>.
 </p>
 <p>This is supported only on some operating systems, notably those which use
 the ELF format for binary files and the <small>GNU</small> Binutils.  For more details
 about this feature, see the description of the <samp>--build-id</samp>
 command-line option in <a href="http://sourceware.org/binutils/docs/ld/Options.html#Options">Command Line Options</a> in <cite>The GNU Linker</cite>.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002eprogspace"></a>Variable: <strong>Objfile.progspace</strong></dt>
 <dd><p>The containing program space of the objfile as a <code>gdb.Progspace</code>
 object.  See <a href="Progspaces-In-Python.html#Progspaces-In-Python">Progspaces In Python</a>.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002epretty_005fprinters"></a>Variable: <strong>Objfile.pretty_printers</strong></dt>
 <dd><p>The <code>pretty_printers</code> attribute is a list of functions.  It is
 used to look up pretty-printers.  A <code>Value</code> is passed to each
 function in order; if the function returns <code>None</code>, then the
 search continues.  Otherwise, the return value should be an object
 which is used to format the value.  See <a href="Pretty-Printing-API.html#Pretty-Printing-API">Pretty Printing API</a>, for more
 information.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002etype_005fprinters"></a>Variable: <strong>Objfile.type_printers</strong></dt>
 <dd><p>The <code>type_printers</code> attribute is a list of type printer objects.
 See <a href="Type-Printing-API.html#Type-Printing-API">Type Printing API</a>, for more information.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002eframe_005ffilters"></a>Variable: <strong>Objfile.frame_filters</strong></dt>
 <dd><p>The <code>frame_filters</code> attribute is a dictionary of frame filter
 objects.  See <a href="Frame-Filter-API.html#Frame-Filter-API">Frame Filter API</a>, for more information.
 </p></dd></dl>

 <p>One may add arbitrary attributes to <code>gdb.Objfile</code> objects
 in the usual Python way.
 This is useful if, for example, one needs to do some extra record keeping
 associated with the objfile.
 </p>
 <p>In this contrived example we record the time when <small>GDB</small>
 loaded the objfile.
 </p>
 <div class="smallexample">
 <pre class="smallexample">(gdb) python
 import datetime
 def new_objfile_handler(event):
     # Set the time_loaded attribute of the new objfile.
     event.new_objfile.time_loaded = datetime.datetime.today()
 gdb.events.new_objfile.connect(new_objfile_handler)
 end
 (gdb) file ./hello
 Reading symbols from ./hello...done.
 (gdb) python print gdb.objfiles()[0].time_loaded
 2014-10-09 11:41:36.770345
 </pre></div>

 <p>A <code>gdb.Objfile</code> object has the following methods:
 </p>
 <dl>
 <dt><a name="index-Objfile_002eis_005fvalid"></a>Function: <strong>Objfile.is_valid</strong> <em>()</em></dt>
 <dd><p>Returns <code>True</code> if the <code>gdb.Objfile</code> object is valid,
 <code>False</code> if not.  A <code>gdb.Objfile</code> object can become invalid
 if the object file it refers to is not loaded in <small>GDB</small> any
 longer.  All other <code>gdb.Objfile</code> methods will throw an exception
 if it is invalid at the time the method is called.
 </p></dd></dl>

 <dl>
 <dt><a name="index-Objfile_002eadd_005fseparate_005fdebug_005ffile"></a>Function: <strong>Objfile.add_separate_debug_file</strong> <em>(file)</em></dt>
 <dd><p>Add <var>file</var> to the list of files that <small>GDB</small> will search for
 debug information for the objfile.
 This is useful when the debug info has been removed from the program
 and stored in a separate file.  <small>GDB</small> has built-in support for
 finding separate debug info files (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>), but if
 the file doesn&rsquo;t live in one of the standard places that <small>GDB</small>
 searches then this function can be used to add a debug info file
 from a different place.
 </p></dd></dl>

 <hr>
 <div class="header">
 <p>
 Next: <a href="Frames-In-Python.html#Frames-In-Python" accesskey="n" rel="next">Frames In Python</a>, Previous: <a href="Progspaces-In-Python.html#Progspaces-In-Python" accesskey="p" rel="prev">Progspaces In Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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	<a name="Objfiles-In-Python"></a>
	<div class="header">
	<p>
	Next: <a href="Frames-In-Python.html#Frames-In-Python" accesskey="n" rel="next">Frames In Python</a>, Previous: <a href="Progspaces-In-Python.html#Progspaces-In-Python" accesskey="p" rel="prev">Progspaces In Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</a>   [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
	</div>
	<hr>
	<a name="Objfiles-In-Python-1"></a>
	<h4 class="subsubsection">23.2.2.23 Objfiles In Python</h4>

	<a name="index-objfiles-in-python"></a>
	<a name="index-gdb_002eObjfile"></a>
	<a name="index-Objfile"></a>
	<p><small>GDB</small> loads symbols for an inferior from various
	symbol-containing files (see <a href="Files.html#Files">Files</a>). These include the primary
	executable file, any shared libraries used by the inferior, and any
	separate debug info files (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>).
	<small>GDB</small> calls these symbol-containing files <em>objfiles</em>.
	</p>
	<p>The following objfile-related functions are available in the
	<code>gdb</code> module:
	</p>
	<a name="index-gdb_002ecurrent_005fobjfile"></a>
	<dl>
	<dt><a name="index-gdb_002ecurrent_005fobjfile-1"></a>Function: <strong>gdb.current_objfile</strong> <em>()</em></dt>
	<dd><p>When auto-loading a Python script (see <a href="Python-Auto_002dloading.html#Python-Auto_002dloading">Python Auto-loading</a>), <small>GDB</small>
	sets the “current objfile” to the corresponding objfile. This
	function returns the current objfile. If there is no current objfile,
	this function returns <code>None</code>.
	</p></dd></dl>

	<a name="index-gdb_002eobjfiles"></a>
	<dl>
	<dt><a name="index-gdb_002eobjfiles-1"></a>Function: <strong>gdb.objfiles</strong> <em>()</em></dt>
	<dd><p>Return a sequence of all the objfiles current known to <small>GDB</small>.
	See <a href="#Objfiles-In-Python">Objfiles In Python</a>.
	</p></dd></dl>

	<a name="index-gdb_002elookup_005fobjfile"></a>
	<dl>
	<dt><a name="index-gdb_002elookup_005fobjfile-1"></a>Function: <strong>gdb.lookup_objfile</strong> <em>(name <span class="roman">[</span>, by_build_id])</em></dt>
	<dd><p>Look up <var>name</var>, a file name or build ID, in the list of objfiles
	for the current program space (see <a href="Progspaces-In-Python.html#Progspaces-In-Python">Progspaces In Python</a>).
	If the objfile is not found throw the Python <code>ValueError</code> exception.
	</p>
	<p>If <var>name</var> is a relative file name, then it will match any
	source file name with the same trailing components. For example, if
	<var>name</var> is ‘<samp>gcc/expr.c</samp>’, then it will match source file
	name of <samp>/build/trunk/gcc/expr.c</samp>, but not
	<samp>/build/trunk/libcpp/expr.c</samp> or <samp>/build/trunk/gcc/x-expr.c</samp>.
	</p>
	<p>If <var>by_build_id</var> is provided and is <code>True</code> then <var>name</var>
	is the build ID of the objfile. Otherwise, <var>name</var> is a file name.
	This is supported only on some operating systems, notably those which use
	the ELF format for binary files and the <small>GNU</small> Binutils. For more details
	about this feature, see the description of the <samp>--build-id</samp>
	command-line option in <a href="http://sourceware.org/binutils/docs/ld/Options.html#Options">Command Line Options</a> in <cite>The GNU Linker</cite>.
	</p></dd></dl>

	<p>Each objfile is represented by an instance of the <code>gdb.Objfile</code>
	class.
	</p>
	<dl>
	<dt><a name="index-Objfile_002efilename"></a>Variable: <strong>Objfile.filename</strong></dt>
	<dd><p>The file name of the objfile as a string, with symbolic links resolved.
	</p>
	<p>The value is <code>None</code> if the objfile is no longer valid.
	See the <code>gdb.Objfile.is_valid</code> method, described below.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002eusername"></a>Variable: <strong>Objfile.username</strong></dt>
	<dd><p>The file name of the objfile as specified by the user as a string.
	</p>
	<p>The value is <code>None</code> if the objfile is no longer valid.
	See the <code>gdb.Objfile.is_valid</code> method, described below.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002eowner"></a>Variable: <strong>Objfile.owner</strong></dt>
	<dd><p>For separate debug info objfiles this is the corresponding <code>gdb.Objfile</code>
	object that debug info is being provided for.
	Otherwise this is <code>None</code>.
	Separate debug info objfiles are added with the
	<code>gdb.Objfile.add_separate_debug_file</code> method, described below.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002ebuild_005fid"></a>Variable: <strong>Objfile.build_id</strong></dt>
	<dd><p>The build ID of the objfile as a string.
	If the objfile does not have a build ID then the value is <code>None</code>.
	</p>
	<p>This is supported only on some operating systems, notably those which use
	the ELF format for binary files and the <small>GNU</small> Binutils. For more details
	about this feature, see the description of the <samp>--build-id</samp>
	command-line option in <a href="http://sourceware.org/binutils/docs/ld/Options.html#Options">Command Line Options</a> in <cite>The GNU Linker</cite>.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002eprogspace"></a>Variable: <strong>Objfile.progspace</strong></dt>
	<dd><p>The containing program space of the objfile as a <code>gdb.Progspace</code>
	object. See <a href="Progspaces-In-Python.html#Progspaces-In-Python">Progspaces In Python</a>.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002epretty_005fprinters"></a>Variable: <strong>Objfile.pretty_printers</strong></dt>
	<dd><p>The <code>pretty_printers</code> attribute is a list of functions. It is
	used to look up pretty-printers. A <code>Value</code> is passed to each
	function in order; if the function returns <code>None</code>, then the
	search continues. Otherwise, the return value should be an object
	which is used to format the value. See <a href="Pretty-Printing-API.html#Pretty-Printing-API">Pretty Printing API</a>, for more
	information.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002etype_005fprinters"></a>Variable: <strong>Objfile.type_printers</strong></dt>
	<dd><p>The <code>type_printers</code> attribute is a list of type printer objects.
	See <a href="Type-Printing-API.html#Type-Printing-API">Type Printing API</a>, for more information.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002eframe_005ffilters"></a>Variable: <strong>Objfile.frame_filters</strong></dt>
	<dd><p>The <code>frame_filters</code> attribute is a dictionary of frame filter
	objects. See <a href="Frame-Filter-API.html#Frame-Filter-API">Frame Filter API</a>, for more information.
	</p></dd></dl>

	<p>One may add arbitrary attributes to <code>gdb.Objfile</code> objects
	in the usual Python way.
	This is useful if, for example, one needs to do some extra record keeping
	associated with the objfile.
	</p>
	<p>In this contrived example we record the time when <small>GDB</small>
	loaded the objfile.
	</p>
	<div class="smallexample">
	<pre class="smallexample">(gdb) python
	import datetime
	def new_objfile_handler(event):
	# Set the time_loaded attribute of the new objfile.
	event.new_objfile.time_loaded = datetime.datetime.today()
	gdb.events.new_objfile.connect(new_objfile_handler)
	end
	(gdb) file ./hello
	Reading symbols from ./hello...done.
	(gdb) python print gdb.objfiles()[0].time_loaded
	2014-10-09 11:41:36.770345
	</pre></div>

	<p>A <code>gdb.Objfile</code> object has the following methods:
	</p>
	<dl>
	<dt><a name="index-Objfile_002eis_005fvalid"></a>Function: <strong>Objfile.is_valid</strong> <em>()</em></dt>
	<dd><p>Returns <code>True</code> if the <code>gdb.Objfile</code> object is valid,
	<code>False</code> if not. A <code>gdb.Objfile</code> object can become invalid
	if the object file it refers to is not loaded in <small>GDB</small> any
	longer. All other <code>gdb.Objfile</code> methods will throw an exception
	if it is invalid at the time the method is called.
	</p></dd></dl>

	<dl>
	<dt><a name="index-Objfile_002eadd_005fseparate_005fdebug_005ffile"></a>Function: <strong>Objfile.add_separate_debug_file</strong> <em>(file)</em></dt>
	<dd><p>Add <var>file</var> to the list of files that <small>GDB</small> will search for
	debug information for the objfile.
	This is useful when the debug info has been removed from the program
	and stored in a separate file. <small>GDB</small> has built-in support for
	finding separate debug info files (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>), but if
	the file doesn’t live in one of the standard places that <small>GDB</small>
	searches then this function can be used to add a debug info file
	from a different place.
	</p></dd></dl>

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