RE: [cdt-dev] [DSF-GDB] Memory leak when running JUnit tests

[Andy Jin <ajin@xxxxxxx>]

Thanks Marc. I filed this bug
https://bugs.eclipse.org/bugs/show_bug.cgi?id=323071

BTW, I'm afraid this leaking memory problem will happen in any instance
not just in unit test. We haven't run into it because it needs many many
launch instances in one VM. Please set the priority of that bug
accordingly.

Regards,
Andy

-----Original Message-----
From: Marc Khouzam <marc.khouzam@xxxxxxxxxxxx>
Reply-to: "CDT General developers list." <cdt-dev@xxxxxxxxxxx>
To: 'CDT General developers list.' <cdt-dev@xxxxxxxxxxx>
Subject: RE: [cdt-dev] [DSF-GDB] Memory leak when running JUnit tests
Date: Wed, 18 Aug 2010 13:47:58 -0400

I also had some out-of-memory error with the JUnit tests.
Thanks for investigating further.
Can you file a bug with your findings?

Thanks

Marc
 

> -----Original Message-----
> From: cdt-dev-bounces@xxxxxxxxxxx 
> [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Andy Jin
> Sent: Wednesday, August 18, 2010 1:19 PM
> To: cdt-dev@xxxxxxxxxxx
> Subject: [cdt-dev] [DSF-GDB] Memory leak when running JUnit tests
> 
> I am writing JUnit tests based on the current MI*test from 
> DSF-GDB. When
> I run my JUnit tests (140+ tests) on multiple targets (total is 1000+
> tests) I always run out of heap memory. Some tracing reveals there is
> memory leak in the range of 1M-2M per test.
> 
> Further debugging led me to this:
> 
> In my launch delegate I create the GDB CLI process before running my
> finalLaunchSequence
> (https://bugs.eclipse.org/bugs/show_bug.cgi?id=223154), and 
> this creates
> the GDB runtime process allocating around 2M buffer for input/output
> (AbstractCLIProcess). When the launch is terminated this GDB runtime
> process needs to be released and this is done at 
> GDBControl.terminate()
> where it schedules a MIGDBExit().
> 
> However, most of the time (8 out of 10) this MIGDBExit() is not
> completed, thus the future task above it will run after 2 second. This
> task does not kill the GDB process because the state is never
> "State.STARTED" in this case. Not sure if it's related but 
> running this
> task results in a "rejected execution exception" which can be 
> seen from
> the console view.
> 
> I also tried running the DSF/GDB unit tests (e.g. 
> MIRegisterTest) I can
> see the same behavior that the MIGDBExit() is not completed but the
> future task is run.
> 
> Thanks,
> Andy
> 
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