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valgrind.html
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<html>
<head>
<title>
VALGRIND - FORTRAN90 Examples of the VALGRIND Memory Leak Detector
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
VALGRIND <br> FORTRAN90 Examples of the VALGRIND Memory Leak Detector
</h1>
<hr>
<p>
<b>VALGRIND</b>
is a directory of FORTRAN90 programs which
illustrate the use of VALGRIND, a suite of programs which includes
a memory leak detector.
</p>
<p>
The simplest way to use VALGRIND on a program that is suspected of having
memory leaks is to compile with the "-g" option, and then issue the VALGRIND
command followed by the normal execution command:
<pre>
gfortran -g myprog.f90
mv a.out myprog
valgrind myprog
</pre>
</p>
<p>
On a Macintosh, it is necessary to include a particular switch that
generates the necessary symbol tables in order that VALGRIND can report
line numbers.
<pre>
valgrind --dsymutil=yes myprog
</pre>
</p>
<p>
Essentially, VALGRIND runs the program, but constantly watches to detect
illegal memory references, and prints messages when these are spotted.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>VALGRIND</b> examples are available in
<a href = "../../c_src/valgrind/valgrind.html">a C version</a> and
<a href = "../../cpp_src/valgrind/valgrind.html">a C++ version</a> and
<a href = "../../f77_src/valgrind/valgrind.html">a FORTRAN77 version</a>.
<a href = "../../f_src/valgrind/valgrind.html">a FORTRAN90 version</a>.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Julian Seward, et al,<br>
Valgrind Documentation.
</li>
</ol>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<b>TEST01</b> is an example in which 11 elements of the Fibonacci sequence
are stored in a vector allocated only for 10 elements:
<ul>
<li>
<a href = "test01.f90">test01.f90</a>, the calling program;
</li>
<li>
<a href = "test01.sh">test01.sh</a>, commands to
compile, link and run the sample calling program;
</li>
<li>
<a href = "test01_output.txt">test01_output.txt</a>,
the output file.
</li>
<li>
<a href = "test01_valgrind_output.txt">test01_valgrind_output.txt</a>,
the output file using VALGRIND.
</li>
</ul>
</p>
<p>
<b>TEST02</b> is an example in which some uninitialized data is accessed.
<ul>
<li>
<a href = "test02.f90">test02.f90</a>, the calling program;
</li>
<li>
<a href = "test02.sh">test02.sh</a>, commands to
compile, link and run the sample calling program;
</li>
<li>
<a href = "test02_output.txt">test02_output.txt</a>,
the output file.
</li>
<li>
<a href = "test02_valgrind_output.txt">test02_valgrind_output.txt</a>,
the output file using VALGRIND.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 19 May 2011.
</i>
<!-- John Burkardt -->
</body>
</html>