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Wed Dec 22 17:35:01 PST 2010

Thx£¬but the eclipse report PermGen OOM was use the DCE VM. We aready set  -XX:MaxPermSize=512m.the bug is here.
http://kenai.com/jira/browse/DCEVM-1
By the way£¬our company has more than two thousands java developer£¬we can't wait to use this functions in our the development process¡£

·¢¼þÈË: mlvm-dev-bounces at openjdk.java.net [mailto:mlvm-dev-bounces at openjdk.java.net] ´ú±í Thomas Wuerthinger
·¢ËÍÊ±¼ä: 2010Äê12ÔÂ22ÈÕ 19:21
ÊÕ¼þÈË: Da Vinci Machine Project
Ö÷Ìâ: Re: ´ð¸´: Enhanced HotSwapping

The attached crash happend when using the standard HotSpot and not the DCE VM. The version string says "Java HotSpot(TM) Server VM" and not "Dynamic Code Evolution 64-Bit Server VM", so it cannot be an issue related to the DCE VM. Most likely the same applies to the first issue (try to increase permanent generation size with for example -XX:MaxPermSize=512m).

Please report bugs of the DCE VM at http://ssw.jku.at/dcevm/bugtracking/ as suggested in the crash dumps of the VM.

- thomas

On 12/22/2010 09:41 AM, ÐþÏ£ wrote:

Hi, the HotSwap.patch is amazing work. We expressed regarding this is excited¡£ We try it on windows for debug our application¡£

But some errors happen¡£

We use jre 1.6.0_23.

1,when we load eclipse  eclipse often alert permgen OOM¡£

2£¬when we load jboss£¬jboss often crash¡£The jvm erro message are in the attachment¡£

Would you tell me how to solve this¡£

-----ÓÊ¼þÔ¼þ-----

·¢¼þÈË: mlvm-dev-bounces at openjdk.java.net<mailto:mlvm-dev-bounces at openjdk.java.net> [mailto:mlvm-dev-bounces at openjdk.java.net] ´ú±í Thomas Wuerthinger

·¢ËÍÊ±¼ä: 2010Äê12ÔÂ18ÈÕ 19:16

ÊÕ¼þÈË: Da Vinci Machine Project

Ö÷Ìâ: Re: Enhanced HotSwapping

The enhanced hotswapping can be triggered using either the low-level

JNI/JVMTI interface, class file transformers, or the JDWP debugger

interface. There is no API change compared to the restricted hotswapping.

We are currently working on providing a Java API too. In our

implementation of dynamic mixins for Java

(http://ssw.jku.at/dcevm/mixins/), we are using such a Java API to

directly trigger the class redefinition from Java code. Our mixin

implementation allows to dynamically add an interface and its

implementation to an existing class.

- thomas

On 12/18/10 5:49 AM, Chanwit Kaewkasi wrote:

Hello Thomas,

It looks cool, and thank you for binaries.

Is this working through the debugger interface or JVMTI agents?

Regards,

Chanwit

On Sat, Dec 18, 2010 at 00:56, Thomas Wuerthinger

<thomas.wuerthinger at gmail.com><mailto:thomas.wuerthinger at gmail.com>  wrote:

The source code for the HotSpot version that allows enhanced hotswapping

(e.g., add and remove methods, fields, and super types) was just updated

in the mlvm repository. There exists now also a light version of the

modifications "hotswaplight.patch" that minimizes the difference to the

current OpenJDK source code by omitting some of the more advanced

features (e.g., method forwarding, calling deleted old methods,

transformer methods). The enhanced VM passes all tests of Oracle's class

redefinition test suite and comes with unit tests for the new features.

There are binary builds available from "http://ssw.jku.at/dcevm"<http://ssw.jku.at/dcevm> for

Mac, Linux, and Windows. So, feel free to install a VM with the new

hotswapping capabilities on your machine and test them using your

favorite Java IDE.

- thomas

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