94 lines
4.4 KiB
HTML
94 lines
4.4 KiB
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<html lang="en">
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<head>
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<title>Symspecs - GNU gprof</title>
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<meta name="description" content="GNU gprof">
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<link rel="up" href="Invoking.html#Invoking" title="Invoking">
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<link rel="prev" href="Deprecated-Options.html#Deprecated-Options" title="Deprecated Options">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the gprof profiler of the GNU system.
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Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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</head>
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<body>
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<div class="node">
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<a name="Symspecs"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Deprecated-Options.html#Deprecated-Options">Deprecated Options</a>,
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Up: <a rel="up" accesskey="u" href="Invoking.html#Invoking">Invoking</a>
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<hr>
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</div>
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<h3 class="section">4.5 Symspecs</h3>
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<p>Many of the output options allow functions to be included or excluded
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using <dfn>symspecs</dfn> (symbol specifications), which observe the
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following syntax:
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<pre class="example"> filename_containing_a_dot
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| funcname_not_containing_a_dot
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| linenumber
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| ( [ any_filename ] `:' ( any_funcname | linenumber ) )
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</pre>
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<p>Here are some sample symspecs:
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<dl>
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<dt>‘<samp><span class="samp">main.c</span></samp>’<dd>Selects everything in file <samp><span class="file">main.c</span></samp>—the
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dot in the string tells <code>gprof</code> to interpret
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the string as a filename, rather than as
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a function name. To select a file whose
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name does not contain a dot, a trailing colon
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should be specified. For example, ‘<samp><span class="samp">odd:</span></samp>’ is
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interpreted as the file named <samp><span class="file">odd</span></samp>.
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<br><dt>‘<samp><span class="samp">main</span></samp>’<dd>Selects all functions named ‘<samp><span class="samp">main</span></samp>’.
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<p>Note that there may be multiple instances of the same function name
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because some of the definitions may be local (i.e., static). Unless a
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function name is unique in a program, you must use the colon notation
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explained below to specify a function from a specific source file.
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<p>Sometimes, function names contain dots. In such cases, it is necessary
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to add a leading colon to the name. For example, ‘<samp><span class="samp">:.mul</span></samp>’ selects
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function ‘<samp><span class="samp">.mul</span></samp>’.
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<p>In some object file formats, symbols have a leading underscore.
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<code>gprof</code> will normally not print these underscores. When you name a
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symbol in a symspec, you should type it exactly as <code>gprof</code> prints
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it in its output. For example, if the compiler produces a symbol
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‘<samp><span class="samp">_main</span></samp>’ from your <code>main</code> function, <code>gprof</code> still prints
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it as ‘<samp><span class="samp">main</span></samp>’ in its output, so you should use ‘<samp><span class="samp">main</span></samp>’ in
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symspecs.
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<br><dt>‘<samp><span class="samp">main.c:main</span></samp>’<dd>Selects function ‘<samp><span class="samp">main</span></samp>’ in file <samp><span class="file">main.c</span></samp>.
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<br><dt>‘<samp><span class="samp">main.c:134</span></samp>’<dd>Selects line 134 in file <samp><span class="file">main.c</span></samp>.
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</dl>
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</body></html>
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