<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- This file documents the gprof profiler of the GNU system.

Copyright (C) 1988-2014 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, with no Front-Cover Texts, and with no
Back-Cover Texts.  A copy of the license is included in the
section entitled "GNU Free Documentation License".
 -->
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
<head>
<title>GNU gprof: Incompatibilities</title>

<meta name="description" content="GNU gprof: Incompatibilities">
<meta name="keywords" content="GNU gprof: Incompatibilities">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="index.html#Top" rel="up" title="Top">
<link href="Details.html#Details" rel="next" title="Details">
<link href="How-do-I_003f.html#How-do-I_003f" rel="prev" title="How do I?">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.indentedblock {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
div.smalllisp {margin-left: 3.2em}
kbd {font-style:oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nocodebreak {white-space:nowrap}
span.nolinebreak {white-space:nowrap}
span.roman {font-family:serif; font-weight:normal}
span.sansserif {font-family:sans-serif; font-weight:normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Incompatibilities"></a>
<div class="header">
<p>
Next: <a href="Details.html#Details" accesskey="n" rel="next">Details</a>, Previous: <a href="How-do-I_003f.html#How-do-I_003f" accesskey="p" rel="prev">How do I?</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>]</p>
</div>
<hr>
<a name="Incompatibilities-with-Unix-gprof"></a>
<h2 class="chapter">8 Incompatibilities with Unix <code>gprof</code></h2>

<p><small>GNU</small> <code>gprof</code> and Berkeley Unix <code>gprof</code> use the same data
file <samp>gmon.out</samp>, and provide essentially the same information.  But
there are a few differences.
</p>
<ul>
<li> <small>GNU</small> <code>gprof</code> uses a new, generalized file format with support
for basic-block execution counts and non-realtime histograms.  A magic
cookie and version number allows <code>gprof</code> to easily identify
new style files.  Old BSD-style files can still be read.
See <a href="File-Format.html#File-Format">Profiling Data File Format</a>.

</li><li> For a recursive function, Unix <code>gprof</code> lists the function as a
parent and as a child, with a <code>calls</code> field that lists the number
of recursive calls.  <small>GNU</small> <code>gprof</code> omits these lines and puts
the number of recursive calls in the primary line.

</li><li> When a function is suppressed from the call graph with &lsquo;<samp>-e</samp>&rsquo;, <small>GNU</small>
<code>gprof</code> still lists it as a subroutine of functions that call it.

</li><li> <small>GNU</small> <code>gprof</code> accepts the &lsquo;<samp>-k</samp>&rsquo; with its argument
in the form &lsquo;<samp>from/to</samp>&rsquo;, instead of &lsquo;<samp>from to</samp>&rsquo;.

</li><li> In the annotated source listing,
if there are multiple basic blocks on the same line,
<small>GNU</small> <code>gprof</code> prints all of their counts, separated by commas.


</li><li> The blurbs, field widths, and output formats are different.  <small>GNU</small>
<code>gprof</code> prints blurbs after the tables, so that you can see the
tables without skipping the blurbs.
</li></ul>


</body>
</html>