Compute sizes of classes loaded in perm gen

[Sergei Mihhailov]

Dmitry,

I need this information for live process.

- Sergei
On 21.03.2014 11:01, Dmitry Samersoff wrote:
> Sergei,
>
> Does you need this information for coredump or for live process?
>
> -Dmitry
>
>
> On 2014-03-19 17:24, Sergei Mihhailov wrote:
>> Greetings,
>>
>> I’m writing special purpose java agent to compute sizes of classes
>> loaded in perm gen. Basically reimplementing some functionality of “jmap
>> -permstat”. But in order to do that, I need to get instances of
>> InstanceKlass for all loaded classes.
>>
>> I’ve looked up PermStat source code, and tried to use it internally in
>> my agent using its start() method. This attempt failed :
>> “sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process”
>>
>> Is it somehow possible to compute sizes of classes loaded in perm gen?
>>
>>
>> Thanks,
>> Sergei
>>
>