154 lines
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154 lines
7.5 KiB
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<title>Symbol Tables In Guile - Debugging with GDB</title>
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<link rel="up" href="Guile-API.html#Guile-API" title="Guile API">
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<link rel="prev" href="Symbols-In-Guile.html#Symbols-In-Guile" title="Symbols In Guile">
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<body>
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<div class="node">
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<a name="Symbol-Tables-In-Guile"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Breakpoints-In-Guile.html#Breakpoints-In-Guile">Breakpoints In Guile</a>,
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Previous: <a rel="previous" accesskey="p" href="Symbols-In-Guile.html#Symbols-In-Guile">Symbols In Guile</a>,
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Up: <a rel="up" accesskey="u" href="Guile-API.html#Guile-API">Guile API</a>
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<hr>
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</div>
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<h5 class="subsubsection">23.3.3.18 Symbol table representation in Guile.</h5>
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<p><a name="index-symbol-tables-in-guile-2749"></a><a name="index-g_t_003cgdb_003asymtab_003e-2750"></a><a name="index-g_t_003cgdb_003asal_003e-2751"></a>
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Access to symbol table data maintained by <span class="sc">gdb</span> on the inferior
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is exposed to Guile via two objects: <code><gdb:sal></code> (symtab-and-line) 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>frame-find-sal</code> <code><gdb:frame></code> procedure.
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See <a href="Frames-In-Guile.html#Frames-In-Guile">Frames In Guile</a>.
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<p>For more information on <span class="sc">gdb</span>'s symbol table management, see
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<a href="Symbols.html#Symbols">Examining the Symbol Table</a>.
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<p>The following symtab-related procedures are provided by the
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<code>(gdb)</code> module:
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<div class="defun">
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— Scheme Procedure: <b>symtab?</b><var> object<a name="index-symtab_003f-2752"></a></var><br>
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<blockquote><p>Return <code>#t</code> if <var>object</var> is an object of type <code><gdb:symtab></code>.
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Otherwise return <code>#f</code>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>symtab-valid?</b><var> symtab<a name="index-symtab_002dvalid_003f-2753"></a></var><br>
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<blockquote><p>Return <code>#t</code> if the <code><gdb:symtab></code> object is valid,
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<code>#f</code> if not. A <code><gdb:symtab></code> object becomes invalid when
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the symbol table it refers to no longer exists in <span class="sc">gdb</span>.
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All other <code><gdb:symtab></code> procedures will throw an exception
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if it is invalid at the time the procedure is called.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>symtab-filename</b><var> symtab<a name="index-symtab_002dfilename-2754"></a></var><br>
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<blockquote><p>Return the symbol table's source filename.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>symtab-fullname</b><var> symtab<a name="index-symtab_002dfullname-2755"></a></var><br>
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<blockquote><p>Return the symbol table's source absolute file name.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>symtab-objfile</b><var> symtab<a name="index-symtab_002dobjfile-2756"></a></var><br>
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<blockquote><p>Return the symbol table's backing object file. See <a href="Objfiles-In-Guile.html#Objfiles-In-Guile">Objfiles In Guile</a>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>symtab-global-block</b><var> symtab<a name="index-symtab_002dglobal_002dblock-2757"></a></var><br>
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<blockquote><p>Return the global block of the underlying symbol table.
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See <a href="Blocks-In-Guile.html#Blocks-In-Guile">Blocks In Guile</a>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>symtab-static-block</b><var> symtab<a name="index-symtab_002dstatic_002dblock-2758"></a></var><br>
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<blockquote><p>Return the static block of the underlying symbol table.
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See <a href="Blocks-In-Guile.html#Blocks-In-Guile">Blocks In Guile</a>.
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</p></blockquote></div>
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<p>The following symtab-and-line-related procedures are provided by the
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<code>(gdb)</code> module:
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<div class="defun">
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— Scheme Procedure: <b>sal?</b><var> object<a name="index-sal_003f-2759"></a></var><br>
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<blockquote><p>Return <code>#t</code> if <var>object</var> is an object of type <code><gdb:sal></code>.
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Otherwise return <code>#f</code>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>sal-valid?</b><var> sal<a name="index-sal_002dvalid_003f-2760"></a></var><br>
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<blockquote><p>Return <code>#t</code> if <var>sal</var> is valid, <code>#f</code> if not.
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A <code><gdb:sal></code> object becomes invalid when the Symbol table object
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it refers to no longer exists in <span class="sc">gdb</span>. All other
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<code><gdb:sal></code> procedures will throw an exception if it is
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invalid at the time the procedure is called.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>sal-symtab</b><var> sal<a name="index-sal_002dsymtab-2761"></a></var><br>
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<blockquote><p>Return the symbol table object (<code><gdb:symtab></code>) for <var>sal</var>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>sal-line</b><var> sal<a name="index-sal_002dline-2762"></a></var><br>
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<blockquote><p>Return the line number for <var>sal</var>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>sal-pc</b><var> sal<a name="index-sal_002dpc-2763"></a></var><br>
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<blockquote><p>Return the start of the address range occupied by code for <var>sal</var>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>sal-last</b><var> sal<a name="index-sal_002dlast-2764"></a></var><br>
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<blockquote><p>Return the end of the address range occupied by code for <var>sal</var>.
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</p></blockquote></div>
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<div class="defun">
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— Scheme Procedure: <b>find-pc-line</b><var> pc<a name="index-find_002dpc_002dline-2765"></a></var><br>
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<blockquote><p>Return the <code><gdb:sal></code> object corresponding to the <var>pc</var> value.
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If an invalid value of <var>pc</var> is passed as an argument, then the
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<code>symtab</code> and <code>line</code> attributes of the returned <code><gdb:sal></code>
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object will be <code>#f</code> and 0 respectively.
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</p></blockquote></div>
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</body></html>
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