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| <title>GNU gprof: Symspecs</title> |
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| <a name="Symspecs"></a> |
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| Previous: <a href="Deprecated-Options.html#Deprecated-Options" accesskey="p" rel="prev">Deprecated Options</a>, Up: <a href="Invoking.html#Invoking" accesskey="u" rel="up">Invoking</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>]</p> |
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| <a name="Symspecs-1"></a> |
| <h3 class="section">4.5 Symspecs</h3> |
| |
| <p>Many of the output options allow functions to be included or excluded |
| using <em>symspecs</em> (symbol specifications), which observe the |
| following syntax: |
| </p> |
| <div class="example"> |
| <pre class="example"> filename_containing_a_dot |
| | funcname_not_containing_a_dot |
| | linenumber |
| | ( [ any_filename ] `:' ( any_funcname | linenumber ) ) |
| </pre></div> |
| |
| <p>Here are some sample symspecs: |
| </p> |
| <dl compact="compact"> |
| <dt>‘<samp>main.c</samp>’</dt> |
| <dd><p>Selects everything in file <samp>main.c</samp>—the |
| dot in the string tells <code>gprof</code> to interpret |
| the string as a filename, rather than as |
| a function name. To select a file whose |
| name does not contain a dot, a trailing colon |
| should be specified. For example, ‘<samp>odd:</samp>’ is |
| interpreted as the file named <samp>odd</samp>. |
| </p> |
| </dd> |
| <dt>‘<samp>main</samp>’</dt> |
| <dd><p>Selects all functions named ‘<samp>main</samp>’. |
| </p> |
| <p>Note that there may be multiple instances of the same function name |
| because some of the definitions may be local (i.e., static). Unless a |
| function name is unique in a program, you must use the colon notation |
| explained below to specify a function from a specific source file. |
| </p> |
| <p>Sometimes, function names contain dots. In such cases, it is necessary |
| to add a leading colon to the name. For example, ‘<samp>:.mul</samp>’ selects |
| function ‘<samp>.mul</samp>’. |
| </p> |
| <p>In some object file formats, symbols have a leading underscore. |
| <code>gprof</code> will normally not print these underscores. When you name a |
| symbol in a symspec, you should type it exactly as <code>gprof</code> prints |
| it in its output. For example, if the compiler produces a symbol |
| ‘<samp>_main</samp>’ from your <code>main</code> function, <code>gprof</code> still prints |
| it as ‘<samp>main</samp>’ in its output, so you should use ‘<samp>main</samp>’ in |
| symspecs. |
| </p> |
| </dd> |
| <dt>‘<samp>main.c:main</samp>’</dt> |
| <dd><p>Selects function ‘<samp>main</samp>’ in file <samp>main.c</samp>. |
| </p> |
| </dd> |
| <dt>‘<samp>main.c:134</samp>’</dt> |
| <dd><p>Selects line 134 in file <samp>main.c</samp>. |
| </p></dd> |
| </dl> |
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