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129 lines
5.0 KiB
HTML
129 lines
5.0 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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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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Back-Cover Texts. A copy of the license is included in the
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section entitled "GNU Free Documentation License".
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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Symspecs (GNU gprof)</title>
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<meta name="description" content="Symspecs (GNU gprof)">
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<meta name="keywords" content="Symspecs (GNU gprof)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Invoking.html#Invoking" rel="up" title="Invoking">
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<link href="Output.html#Output" rel="next" title="Output">
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<link href="Deprecated-Options.html#Deprecated-Options" rel="prev" title="Deprecated Options">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Symspecs"></a>
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<div class="header">
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<p>
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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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</div>
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<hr>
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<a name="Symspecs-1"></a>
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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 <em>symspecs</em> (symbol specifications), which observe the
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following syntax:
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</p>
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<div class="example">
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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></div>
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<p>Here are some sample symspecs:
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</p>
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<dl compact="compact">
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<dt>‘<samp>main.c</samp>’</dt>
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<dd><p>Selects everything in file <samp>main.c</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>odd:</samp>’ is
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interpreted as the file named <samp>odd</samp>.
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</p>
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</dd>
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<dt>‘<samp>main</samp>’</dt>
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<dd><p>Selects all functions named ‘<samp>main</samp>’.
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</p>
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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>
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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>:.mul</samp>’ selects
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function ‘<samp>.mul</samp>’.
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</p>
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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>_main</samp>’ from your <code>main</code> function, <code>gprof</code> still prints
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it as ‘<samp>main</samp>’ in its output, so you should use ‘<samp>main</samp>’ in
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symspecs.
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</p>
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</dd>
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<dt>‘<samp>main.c:main</samp>’</dt>
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<dd><p>Selects function ‘<samp>main</samp>’ in file <samp>main.c</samp>.
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</p>
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</dd>
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<dt>‘<samp>main.c:134</samp>’</dt>
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<dd><p>Selects line 134 in file <samp>main.c</samp>.
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</p></dd>
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</dl>
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</body>
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</html>
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