BTrace: General Discussion: what happens on btrace disconnect

Mailing Lists
Project chat room
» chat
Source Code Repositories
» BTrace IDE Support
» Core
» Mavenized Core
» NetBeans API
» VisualVM Plugin
Downloads
» Documents & Files
Message Forums
» General Discussion
» Tips & Tricks
Issue Tracking
» JIRA
Website
» BTrace
Wiki
» Wiki

BTrace was started in June 2009, is owned by sundararajana, and has 65 members.

» Join This Project

what happens on btrace disconnect

» Back to forum topics

4 posts

Replies: 3 - Last Post: April 19, 2012 16:28
by: Jaroslav Bachorik

« Older Topic » Newer Topic

showing 1 - 4 of 4

gdanov

Posted: January 13, 2012 16:54 by gdanov

» Permalink

Hi,
I am playing with BTrace using the btrace command line utility. I am interested to know what happens with the injected byte code when I terminate btrace. Are the instrumented classes reverted? Is my injected bytecode still lying around, inactive?
The point is that I would like to use BTrace on production systems and want to know what is happening with the injected bytecode.

Best Regards,
Georgi

Jaroslav Bachorik	Posted: January 15, 2012 18:45 by Jaroslav Bachorik » Permalink
	Hi, currently the BTrace code is deactivated but the generated classes as well as the instrumentation linger around. Probably we should look into this and find out a way how to remove the inactive BTrace code from the target JVM. -JB-

chandler	Posted: April 16, 2012 08:25 by chandler » Permalink
	Hi Jaroslav: I‘m now studying btrace source code.But i just cant find out how Btrace code been deactivated .Can u give a hand?

Jaroslav Bachorik

Posted: April 19, 2012 16:28 by Jaroslav Bachorik

» Permalink

Hi Chandler,
take a look at com.sun.btrace.agent.Client.onExit() method. There you can see that the particular BTrace bytecode transformer is being unregistered and the classes are retransformed, effectively removing all the instrumentation injected in this session.

As I mentioned before the BTrace generated classes (artifacts generated for the compiled BTrace scripts) will hang around indefinitely as they are defined by the bootclassloader and will never get garbage collected. But their methods are virtually unreachable.

-JB-

Replies: 3 - Last Post: April 19, 2012 16:28
by: Jaroslav Bachorik

« Older Topic » Newer Topic