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Message-ID: <e66844de0608132039p4c4dfefer78684a21e5e5682@mail.gmail.com>
Date: Mon, 14 Aug 2006 11:39:18 +0800
From: "Leo Li" <liyilei1979@gmail.com>
To: harmony-dev@incubator.apache.org, geir@pobox.com
Subject: Re: [classlib][instrument]Method to terminate VM.
In-Reply-To: <44DC7E8E.8010404@pobox.com>
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References: <e66844de0608091952j5fbd0a6ey58c2b79a257bb854@mail.gmail.com>
	 <44DBE924.7060900@gmail.com> <44DC7E8E.8010404@pobox.com>

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Hi, all
      The case is we need to load an implementation class during VM init and
should terminate it if the class cannot be found.
      Here is the code.

 inst_class =
(*env)->FindClass(env,
"org/apache/harmony/instrument/internal/InstrumentationImpl");
 if(NULL == inst_class){
  //VM exits abnormally.
  (*env)->FatalError(env,"class cannot find:
org/apache/harmony/instrument/internal/InstrumentationImpl");
 }

Thank you.

On 8/11/06, Geir Magnusson Jr <geir@pobox.com> wrote:
>
> How far along is this code?  Any chance you want to toss up a snapshot
> of it so people can look and comment and ... maybe even help?
>
> geir
>
>
> Jimmy, Jing Lv wrote:
> > Leo Li wrote:
> >> Hi, all
> >>     During the implementaion of instrument, I encounter the choice
> about
> >> how to terminate the VM when some abnormal event occurs, for example,
> the
> >> expected jar file does not exist or the implementation class of
> >> Instrumentation cannot be found. The most simple and direct way is
> >> just to
> >> call exit(), and then the whole process will terminate. Hence OS will
> >> treat
> >> with all the release of resources. However, I propose to use
> >> FatalError of
> >> JNI instead, which notifies the VM to suicide, because it gives right
> >> to the
> >> implementation of VM to take charge of its own funeral affairs, which
> >> might
> >> include, for example, logging the cause of its crash.
> >>    Any suggestion from VM guys?
> >>    Thanks :)
> >>
> >
> > Hi,
> >
> >     I agree that use VM FatalError is better than system exit(). If no
> > objections, I will make code that way.
> >
>
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-- 
Leo Li
China Software Development Lab, IBM

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