Calling into Java from COMPILED_METHOD_LOAD callback

[Daniel D. Daugherty]

On 8/6/13 12:16 PM, Martin Traverso wrote:
> Is it safe to call Java code via JNI from the COMPILED_METHOD_LOAD 
> callback? The JVMTI spec is not explicit about this, and the closest 
> thing I could find is in relation to the GenerateEvents function:
>
> "Attempts to execute Java programming language code or JNI functions 
> may be paused until this function returns - so neither should be 
> called from the thread sending the event. This function returns only 
> after the missed events have been sent, processed and have returned".
>
> Thanks,
> Martin

In general, event handlers should do as little as possible to avoid
adverse interactions with the rest of the VM. Calling Java code from
an event handler would not really qualify "as little as possible".

You should probably check out the "Handling Events" subsection in
this doc:

http://docs.oracle.com/javase/7/docs/platform/jvmti/jvmti.html#EventSection

In particular there is a bullet list of general guidelines.

Dan
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