[cdt-dev] RE: Adding MakeTargets takes a long time and consumes a huge a

["James Blackburn" <james.blackburn@xxxxxxxxxxxx>]

You should try to get a heap dump of the out of memory exception.  If you're using a Sun VM run it with vm args of
-XX:+HeapDumpOnOutOfMemoryError
It will then output a heap file which you can analyse with something like Eclipse memory analyzer:
http://www.eclipse.org/mat/

This should give you a better idea of what's going on.

Cheers,

James

> -----Original Message-----
> From: cdt-dev-bounces@xxxxxxxxxxx
> [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Merx, Thomas
> Sent: 13 August 2008 09:59
> To: cdt-dev@xxxxxxxxxxx
> Subject: [cdt-dev] Adding MakeTargets takes a long time and
> consumes a huge amount of heap
>
> Eclipse SDK Version: 3.3.2
> JRE Version: 1.5.0_07
> CDT Version: 4.0.3
>
> Hi everybody,
>
> I am currently working on a plugin project where I want to
> programmatically add MakeTargets to my C project. The C project has a
> lot of folders and sub-folders and in some of these folders I
> add from 4
> to 8 MakeTargets resulting in a few hundred MakeTargets to
> add. The code
> I use to add one of these MakeTargets is this:
>
> ...
> try
> {
>    IMakeTarget makeTgtBuild;
>    String name = "build(comps, lintgen, projects)";
>    makeTgtBuild = tgtMan.findTarget(container1, name);
>    if (makeTgtBuild == null)
>    {
>       // Create 'build' make target
>       makeTgtBuild = tgtMan.createTarget(prj, name, targetBuilderID);
>       makeTgtBuild.setContainer(container1);
>       makeTgtBuild.setBuildAttribute(IMakeTarget.BUILD_TARGET, "comps
> lintgen projects");
>       if (!tgtMan.targetExists(makeTgtBuild))
>       {
>             tgtMan.addTarget(container1, makeTgtBuild);
>       }
>    }
> }
> catch(Exception e)
> {
>    e.printStackTrace();
> }
> ...
>
> I call this code in a WorkspaceJob. In general this works, but I have
> two problems with this approach:
>
> 1.) The call of the method 'addTarget' takes a long time. Is
> there a way
> to speed this up?
> 2.) The more serious problem is that I ran out of heap after
> some time.
> I don't know why, but the used heap increases more and more while the
> Job that I run adds more targets. I tried to increase the heap for the
> Java VM but this does not really solve the problem but only delays it.
> Does anybody has a hint on how to solve this issue?
>
> Regards,
> Thomas Merx
>
> end
>
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