dtrace discuss - Oct 2006 - Write and fire a probe in Java

All DTrace examples I found that use Java are
- instrumentations of the Java VM
- Consumers, intented to visualize DTrace events in Java

But how do I write and fire a probe in Java? Any hints, examples, or
documentation?

Gerd
 
 
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You can''t create static probes in Java, but you can instrument method
entry
and return:

	dvm<pid>:::method-entry	dvm<pid>:::method-return

(or use the hotspot provider with the 1.6 JVM)

Adam

On Sat, Oct 28, 2006 at 12:44:46PM -0700, Gerd Castan
wrote:
> All DTrace examples I found that use Java are
> - instrumentations of the Java VM
> - Consumers, intented to visualize DTrace events in Java
> 
> But how do I write and fire a probe in Java? Any hints, examples, or
documentation?
> 
> Gerd
>  
>  
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl

Gerd,

I''ve wondered myself and come to the conclusion that you need to go
through JNI to call a USDT (terminology?) probe in C. Some details here:
http://mernst.org/blog/rss.xml#SDT-probes-for-Java. Happy to discuss this
further.

Gruss
Matthias
 
 
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