Memoryleak detection using MALLOCDEBUG


 
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Operating Systems AIX Memoryleak detection using MALLOCDEBUG
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Old 03-30-2008
Memoryleak detection using MALLOCDEBUG

This topic could also fit into the High Level Programming Forum, but i post it here since its very AIX specific.
I am trying to isolate and resolve memory leaks and -corruption using AIX's MALLOCDEBUG environment variables.
Isolate and resolve memory leaks using MALLOCDEBUG on AIX Version 5.3

This works fine when using a small test application. But when using it with with our more complex application it crashes with signal 4 when starting up and no error message is printed to the mallocdebug logfile.

I wonder if anyone has been using this feature with a 'real' application with success.

And i wonder if there are any alternatives for searching memory leaks / memory corruption within a c programm.

- AIX MALLOCDEBUG
- Purify (only works with a specifig gcc version)
- ZeroFault (commercial didnt try it yet)
- libraries like EFence (needs recompilation of the complete source (which sucks))
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SENSORS-DETECT(8)					      System Manager's Manual						 SENSORS-DETECT(8)

NAME
sensors-detect - detect hardware monitoring chips SYNOPSIS
sensors-detect DESCRIPTION
sensors-detect is an interactive program that will walk you through the process of scanning your system for various hardware monitoring chips, or sensors, supported by libsensors(3), or more generally by the lm_sensors tool suite. sensors-detect will look for the following devices, in order: o Sensors embedded in CPUs, south bridges and memory controllers. o Sensors embedded in Super I/O chips. o Hardware monitoring chips accessed through ISA I/O ports. o Hardware monitoring chips reachable over the SMBus or more generally any I2C bus on your system. As the last two detection steps can cause trouble on some systems, they are normally not attempted if the second detection step led to the discovery of a Super I/O chip with complete hardware monitoring features. However, the user is always free to ask for all detection steps if so is his/her wish. This can be useful if a given system has more than one hardware monitoring chip. Some vendors are known to do this, most notably Asus and Tyan. WARNING
sensors-detect needs to access the hardware for most of the chip detections. By definition, it doesn't know which chips are there before it manages to identify them. This means that it can access chips in a way these chips do not like, causing problems ranging from SMBus lockup to permanent hardware damage (a rare case, thankfully.) The authors made their best to make the detection as safe as possible, and it turns out to work just fine in most cases, however it is impossible to guarantee that sensors-detect will not lock or kill a specific system. So, as a rule of thumb, you should not run sensors- detect on production servers, and you should not run sensors-detect if can't afford replacing a random part of your system. Also, it is recommended to not force a detection step which would have been skipped by default, unless you know what you are doing. SEE ALSO
sensors(1), libsensors(3) AUTHOR
Frodo Looijaard and Jean Delvare lm-sensors 3 December 2008 SENSORS-DETECT(8)