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82 lines
3.7 KiB
HTML
82 lines
3.7 KiB
HTML
4 years ago
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<html lang="en">
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<title>Incompatibilities - GNU gprof</title>
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<meta name="description" content="GNU gprof">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="prev" href="How-do-I_003f.html#How-do-I_003f" title="How do I?">
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<link rel="next" href="Details.html#Details" title="Details">
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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) 1988-2015 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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</head>
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<body>
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<div class="node">
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<a name="Incompatibilities"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Details.html#Details">Details</a>,
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Previous: <a rel="previous" accesskey="p" href="How-do-I_003f.html#How-do-I_003f">How do I?</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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<hr>
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</div>
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<h2 class="chapter">8 Incompatibilities with Unix <code>gprof</code></h2>
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<p><span class="sc">gnu</span> <code>gprof</code> and Berkeley Unix <code>gprof</code> use the same data
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file <samp><span class="file">gmon.out</span></samp>, and provide essentially the same information. But
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there are a few differences.
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<ul>
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<li><span class="sc">gnu</span> <code>gprof</code> uses a new, generalized file format with support
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for basic-block execution counts and non-realtime histograms. A magic
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cookie and version number allows <code>gprof</code> to easily identify
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new style files. Old BSD-style files can still be read.
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See <a href="File-Format.html#File-Format">Profiling Data File Format</a>.
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<li>For a recursive function, Unix <code>gprof</code> lists the function as a
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parent and as a child, with a <code>calls</code> field that lists the number
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of recursive calls. <span class="sc">gnu</span> <code>gprof</code> omits these lines and puts
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the number of recursive calls in the primary line.
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<li>When a function is suppressed from the call graph with ‘<samp><span class="samp">-e</span></samp>’, <span class="sc">gnu</span>
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<code>gprof</code> still lists it as a subroutine of functions that call it.
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<li><span class="sc">gnu</span> <code>gprof</code> accepts the ‘<samp><span class="samp">-k</span></samp>’ with its argument
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in the form ‘<samp><span class="samp">from/to</span></samp>’, instead of ‘<samp><span class="samp">from to</span></samp>’.
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<li>In the annotated source listing,
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if there are multiple basic blocks on the same line,
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<span class="sc">gnu</span> <code>gprof</code> prints all of their counts, separated by commas.
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<li>The blurbs, field widths, and output formats are different. <span class="sc">gnu</span>
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<code>gprof</code> prints blurbs after the tables, so that you can see the
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tables without skipping the blurbs.
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</ul>
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</body></html>
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