Difference between revisions of "Development/Tools/Valgrind"

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Valgrind is a [[Development/Tools|tool]] to analyze a program regarding memory leaks.
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{{ Moved To Community | Guidelines_and_HOWTOs/Valgrind }}
 
 
== Leak Detection ==
 
One of the valgrind tools is the memcheck, that can be used to detect memory leaks during the execution of an application.
 
 
 
To do that, valgrind can be started as:
 
> valgrind --tool=memcheck --leak-check=yes -v ''appname''
 
where ''appname'' is the application you want to run, including its parameters, if it have to be called with any.
 
 
 
As valgrind can produce a lot of output (and thus scroll out of your terminal), you can call valgrind redirecting its output to a file, so nothing gets lost.
 
> valgrind --tool=memcheck --leak-check=yes -v ''appname'' 2>&1 | tee valgrind.log
 
This will call valgrind as seen above, and will redirect all the output coming from both our application and valgrind to a file in the current directory called {{path|valgrind.log}} (of course it is possible to use any file name of the log).
 
 
 
=== Minor tweaks ===
 
 
 
* executing valgrind with <tt>--leak-check=full</tt> instead of <tt>--leak-check=yes</tt> can give a more detailed output, especially about the found leaks
 
 
 
* Using the <tt>--track-origins=yes</tt> flag is even slower than normal Valgrind but gives you the location where the memory used incorrectly was allocated in many situations.
 
 
 
== References ==
 
* [http://www.valgrind.org/ The Valgrind Homepage]
 
* [http://www.tldp.org/HOWTO/Valgrind-HOWTO/ Excellent tutorial at TLDP]
 

Latest revision as of 12:15, 11 March 2016

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This page was last edited on 11 March 2016, at 12:15. Content is available under Creative Commons License SA 4.0 unless otherwise noted.