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| <a name="Incompatibilities"></a> |
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| 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> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>]</p> |
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| <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 ‘<samp>-e</samp>’, <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 ‘<samp>-k</samp>’ with its argument |
| in the form ‘<samp>from/to</samp>’, instead of ‘<samp>from to</samp>’. |
| |
| </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> |
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