dynamic attach fails when using intellij dynamic classpath

[Aleksey Shipilev]

Hi,

On 05/14/2015 10:00 PM, Brian Harris wrote:
> I have tested with Intellij versions 12,13,14. Any ideas what the problem
> is? Using debugger I can see that it blows up on this line
> inside org.openjdk.jol.util.InstrumentationSupport#tryDynamicAttach
> 
> vmClass.getDeclaredMethod("loadAgent", String.class, String.class)
>         .invoke(vm, agentFile.getAbsolutePath(), "");
> 
> 
> However, debugger shows seemingly equivalent values for vmClass and vm and
> agentFile in both pass and fail scenarios, so I'm a bit stuck.

Actually, that code delivers a few "legitimate" exceptions that are
ignored in InstrumentationSupport.instance(). Adding
"ignored.printStackTrace()" there helps to diagnose the issues.

I have pushed two minor corrections to our dynamic attach code, and at
least my IDEA 14 now works fine with "dynamic.classpath" = true. See:
 https://bugs.openjdk.java.net/browse/CODETOOLS-7901425
 http://hg.openjdk.java.net/code-tools/jol/rev/9d15f184835e

We are going to release next patch update soon (today), so please check
this out as soon as possible.

Thanks,
-Aleksey.