The NoClassDefFoundError bug is back :(

[Rémi Forax]

On 12/06/2011 10:34 AM, Rémi Forax wrote:
> On 12/05/2011 04:28 PM, Rémi Forax wrote:
>> John, Christian,
>> I was updating the multi-dispatch sample from the cookbook
>> when the NoClassDefFoundError bug re-appear.
> I've reduced the code to this simple sample:
> public class NoClassDefFoundSample {
>     public void foo() {
>       // do nothing
>     }
>
>     public static void main(String[] args) {
>       NoClassDefFoundSample classDefFoundSample = new
> NoClassDefFoundSample();
>       for(int i=0; i<  100000; i++) {
>         classDefFoundSample.foo();   // invokedynamic
>       }
>     }
> }
>
> public class NoClassDefFoundBug {
>     // bootstrap method
>     public static CallSite invokevirtual(Lookup lookup, String name,
> MethodType type) throws Throwable {
>       MethodHandle mh = lookup.findVirtual(type.parameterType(0), name,
>           type.dropParameterTypes(0, 1));
>
>       CallSite invokerCallSite = new MutableCallSite(mh);
>
>       MethodHandle dynamicInvoker = invokerCallSite.dynamicInvoker();
>
>       CallSite callSite = new MutableCallSite(type);
>       callSite.setTarget(dynamicInvoker);
>
>       return callSite;
>     }
> }
>
> The sample triggers the JIT and the JITed code of the dynamicInvoker()
> throws
> the NoClassDefFoundError.
>
> Code is available here:
> https://code.google.com/p/jsr292-cookbook/source/browse/#svn/trunk/multi-dispatch/src/bug
> https://code.google.com/p/jsr292-cookbook/source/browse/trunk/multi-dispatch/NoClassDefFoundSample.java

I've forget to say that a workaround is to erase the type used the callsite
before calling dynamicInvoker().

>
> cheers,
> Rémi

cheers,
Rémi