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From Armand Navabi <anav...@purdue.edu>
Subject Re: [drlvm][jvmti] JVMTI support?
Date Mon, 05 Mar 2007 22:25:58 GMT
Gregory,

That worked (always using JVMTI_VERSION_1 constant).

Thanks,
Armand

Gregory Shimansky wrote:
> On Tuesday 06 March 2007 00:03 Armand Navabi wrote:
>   
>> Pavel,
>>
>> Interesting.  I am working on Ubuntu 6.06.  If I am in the Harmony bin
>> directory and I try to run like this:
>>
>> ./java -agentpath:<path to simpleAgent build> HelloWorld
>>
>> I get the error I explained before.  When I use Sun's java (java 5.0), it
>> works fine.
>>     
>
> I looked at the agent source and I find some inconsistency in its code. It 
> calls GetEnv with JVMTI_VERSION constant, but prints error message with 
> JVMTI_VERIONS_1 constant.
>
> These constants are actually different. The JVMTI_VERSION_1 constant has 0 in 
> MICRO version field while JVMTI_VERSION has the actual MICRO version for the 
> JVMTI implementation in VM. Could you change the agent to always use 
> JVMTI_VERSION_1? In this case you won't depend on the MICRO version of the 
> JVMTI implementation of the header file from JDK that you've used to compile 
> agent code.
>
>   
>> -----Original Message-----
>> From: Pavel Pervov [mailto:pmcfirst@gmail.com]
>> Sent: Monday, March 05, 2007 5:33 AM
>> To: dev@harmony.apache.org
>> Subject: Re: [drlvm][jvmti] JVMTI support?
>>
>> Armand,
>>
>> I tried this simple agent on Windows and got it working perfectly.
>>
>> What platform you are working on?
>>
>> Pavel.
>>
>> On 3/5/07, Armand Navabi <anavabi@purdue.edu> wrote:
>>     
>>> Is there support for JVM Tool Interface from the JIT?  The developers
>>> guide says that the JVMTI support component relies on support from
>>> execution engines.  Section 3.3.2 mentions support for JVMTI in the
>>> interpreter, but I see no mention in the JIT section (Section 3.3.1).
>>>
>>> I am trying to use this simple agent
>>> (
>>>       
>> http://wsjoung.wordpress.com/2006/11/17/the-java-virtual-machine-tool-inter
>> f ace-jvmti/
>>
>>     
>>> ),
>>> but it causes the following error:
>>>
>>> ERROR: Unable to access JVMTI Version 1 (0x30010000), is your J2SE a 1.5
>>> or newer version? JNIEnvs GetEnv() returned -3
>>>
>>> I tried to use the agent with both the JIT and the interpreter, but both
>>> resulted in the above error.
>>>
>>> Thanks,
>>> Armand
>>>       
>
>   


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