You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
4.1 KiB
HTML
83 lines
4.1 KiB
HTML
4 years ago
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>Gcov Data Files - Using the GNU Compiler Collection (GCC)</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="Using the GNU Compiler Collection (GCC)">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="up" href="Gcov.html#Gcov" title="Gcov">
|
||
|
|
<link rel="prev" href="Gcov-and-Optimization.html#Gcov-and-Optimization" title="Gcov and Optimization">
|
||
|
|
<link rel="next" href="Cross_002dprofiling.html#Cross_002dprofiling" title="Cross-profiling">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
Copyright (C) 1988-2015 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 the
|
||
|
|
Invariant Sections being ``Funding Free Software'', the Front-Cover
|
||
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
||
|
|
(see below). A copy of the license is included in the section entitled
|
||
|
|
``GNU Free Documentation License''.
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development.-->
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<style type="text/css"><!--
|
||
|
|
pre.display { font-family:inherit }
|
||
|
|
pre.format { font-family:inherit }
|
||
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallexample { font-size:smaller }
|
||
|
|
pre.smalllisp { font-size:smaller }
|
||
|
|
span.sc { font-variant:small-caps }
|
||
|
|
span.roman { font-family:serif; font-weight:normal; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="Gcov-Data-Files"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="Cross_002dprofiling.html#Cross_002dprofiling">Cross-profiling</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Gcov-and-Optimization.html#Gcov-and-Optimization">Gcov and Optimization</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="Gcov.html#Gcov">Gcov</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h3 class="section">10.4 Brief Description of <samp><span class="command">gcov</span></samp> Data Files</h3>
|
||
|
|
|
||
|
|
<p><samp><span class="command">gcov</span></samp> uses two files for profiling. The names of these files
|
||
|
|
are derived from the original <em>object</em> file by substituting the
|
||
|
|
file suffix with either <samp><span class="file">.gcno</span></samp>, or <samp><span class="file">.gcda</span></samp>. The files
|
||
|
|
contain coverage and profile data stored in a platform-independent format.
|
||
|
|
The <samp><span class="file">.gcno</span></samp> files are placed in the same directory as the object
|
||
|
|
file. By default, the <samp><span class="file">.gcda</span></samp> files are also stored in the same
|
||
|
|
directory as the object file, but the GCC <samp><span class="option">-fprofile-dir</span></samp> option
|
||
|
|
may be used to store the <samp><span class="file">.gcda</span></samp> files in a separate directory.
|
||
|
|
|
||
|
|
<p>The <samp><span class="file">.gcno</span></samp> notes file is generated when the source file is compiled
|
||
|
|
with the GCC <samp><span class="option">-ftest-coverage</span></samp> option. It contains information to
|
||
|
|
reconstruct the basic block graphs and assign source line numbers to
|
||
|
|
blocks.
|
||
|
|
|
||
|
|
<p>The <samp><span class="file">.gcda</span></samp> count data file is generated when a program containing
|
||
|
|
object files built with the GCC <samp><span class="option">-fprofile-arcs</span></samp> option is executed.
|
||
|
|
A separate <samp><span class="file">.gcda</span></samp> file is created for each object file compiled with
|
||
|
|
this option. It contains arc transition counts, value profile counts, and
|
||
|
|
some summary information.
|
||
|
|
|
||
|
|
<p>The full details of the file format is specified in <samp><span class="file">gcov-io.h</span></samp>,
|
||
|
|
and functions provided in that header file should be used to access the
|
||
|
|
coverage files.
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|