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<title>Debugging with GDB: Symbol Tables In Python</title>
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<a name="Symbol-Tables-In-Python"></a>
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<div class="header">
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<p>
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Next: <a href="Line-Tables-In-Python.html#Line-Tables-In-Python" accesskey="n" rel="next">Line Tables In Python</a>, Previous: <a href="Symbols-In-Python.html#Symbols-In-Python" accesskey="p" rel="previous">Symbols 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>
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<hr>
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<a name="Symbol-table-representation-in-Python"></a>
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<h4 class="subsubsection">23.2.2.28 Symbol table representation in Python</h4>
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<a name="index-symbol-tables-in-python"></a>
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<a name="index-gdb_002eSymtab"></a>
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<a name="index-gdb_002eSymtab_005fand_005fline"></a>
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<p>Access to symbol table data maintained by <small>GDB</small> on the inferior
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is exposed to Python via two objects: <code>gdb.Symtab_and_line</code> and
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<code>gdb.Symtab</code>. Symbol table and line data for a frame is returned
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from the <code>find_sal</code> method in <code>gdb.Frame</code> object.
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See <a href="Frames-In-Python.html#Frames-In-Python">Frames In Python</a>.
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</p>
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<p>For more information on <small>GDB</small>’s symbol table management, see
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<a href="Symbols.html#Symbols">Examining the Symbol Table</a>, for more information.
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</p>
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<p>A <code>gdb.Symtab_and_line</code> object has the following attributes:
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</p>
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<dl>
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<dt><a name="index-Symtab_005fand_005fline_002esymtab"></a>Variable: <strong>Symtab_and_line.symtab</strong></dt>
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<dd><p>The symbol table object (<code>gdb.Symtab</code>) for this frame.
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This attribute is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_005fand_005fline_002epc"></a>Variable: <strong>Symtab_and_line.pc</strong></dt>
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<dd><p>Indicates the start of the address range occupied by code for the
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current source line. This attribute is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_005fand_005fline_002elast"></a>Variable: <strong>Symtab_and_line.last</strong></dt>
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<dd><p>Indicates the end of the address range occupied by code for the current
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source line. This attribute is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_005fand_005fline_002eline"></a>Variable: <strong>Symtab_and_line.line</strong></dt>
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<dd><p>Indicates the current line number for this object. This
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attribute is not writable.
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</p></dd></dl>
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<p>A <code>gdb.Symtab_and_line</code> object has the following methods:
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</p>
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<dl>
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<dt><a name="index-Symtab_005fand_005fline_002eis_005fvalid"></a>Function: <strong>Symtab_and_line.is_valid</strong> <em>()</em></dt>
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<dd><p>Returns <code>True</code> if the <code>gdb.Symtab_and_line</code> object is valid,
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<code>False</code> if not. A <code>gdb.Symtab_and_line</code> object can become
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invalid if the Symbol table and line object it refers to does not
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exist in <small>GDB</small> any longer. All other
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<code>gdb.Symtab_and_line</code> methods will throw an exception if it is
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invalid at the time the method is called.
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</p></dd></dl>
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<p>A <code>gdb.Symtab</code> object has the following attributes:
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</p>
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<dl>
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<dt><a name="index-Symtab_002efilename"></a>Variable: <strong>Symtab.filename</strong></dt>
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<dd><p>The symbol table’s source filename. This attribute is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_002eobjfile"></a>Variable: <strong>Symtab.objfile</strong></dt>
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<dd><p>The symbol table’s backing object file. See <a href="Objfiles-In-Python.html#Objfiles-In-Python">Objfiles In Python</a>.
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This attribute is not writable.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_002eproducer"></a>Variable: <strong>Symtab.producer</strong></dt>
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<dd><p>The name and possibly version number of the program that
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compiled the code in the symbol table.
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The contents of this string is up to the compiler.
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If no producer information is available then <code>None</code> is returned.
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This attribute is not writable.
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</p></dd></dl>
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<p>A <code>gdb.Symtab</code> object has the following methods:
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</p>
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<dl>
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<dt><a name="index-Symtab_002eis_005fvalid"></a>Function: <strong>Symtab.is_valid</strong> <em>()</em></dt>
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<dd><p>Returns <code>True</code> if the <code>gdb.Symtab</code> object is valid,
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<code>False</code> if not. A <code>gdb.Symtab</code> object can become invalid if
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the symbol table it refers to does not exist in <small>GDB</small> any
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longer. All other <code>gdb.Symtab</code> methods will throw an exception
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if it is invalid at the time the method is called.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_002efullname"></a>Function: <strong>Symtab.fullname</strong> <em>()</em></dt>
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<dd><p>Return the symbol table’s source absolute file name.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_002eglobal_005fblock"></a>Function: <strong>Symtab.global_block</strong> <em>()</em></dt>
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<dd><p>Return the global block of the underlying symbol table.
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See <a href="Blocks-In-Python.html#Blocks-In-Python">Blocks In Python</a>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_002estatic_005fblock"></a>Function: <strong>Symtab.static_block</strong> <em>()</em></dt>
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<dd><p>Return the static block of the underlying symbol table.
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See <a href="Blocks-In-Python.html#Blocks-In-Python">Blocks In Python</a>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-Symtab_002elinetable"></a>Function: <strong>Symtab.linetable</strong> <em>()</em></dt>
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<dd><p>Return the line table associated with the symbol table.
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See <a href="Line-Tables-In-Python.html#Line-Tables-In-Python">Line Tables In Python</a>.
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</p></dd></dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Line-Tables-In-Python.html#Line-Tables-In-Python" accesskey="n" rel="next">Line Tables In Python</a>, Previous: <a href="Symbols-In-Python.html#Symbols-In-Python" accesskey="p" rel="previous">Symbols 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>
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