exception running JDK 8 test program

[Thomas Wuerthinger]

Using VM options "-XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic" should work. I guess we should use "true" as the default flag value.

- thomas


On Feb 14, 2013, at 1:09 PM, "Frost, Gary" <Gary.Frost at amd.com> wrote:

> Obviously ConstantPool tag 18 is MethodHandle.  So this relates to the support for MethodHandles in classfiles. 
> 
> Gary
> 
> 
> 
> -----Original Message-----
> From: graal-dev-bounces at openjdk.java.net [mailto:graal-dev-bounces at openjdk.java.net] On Behalf Of Venkatachalam, Vasanth
> Sent: Thursday, February 14, 2013 2:49 PM
> To: graal-dev at openjdk.java.net
> Subject: exception running JDK 8 test program
> 
> Hi,
> 
> When running the following JDK8 program (which has a lambda expression) in Graal, the VM throws the below exception and exits.
> We know that Graal doesn't yet support the compilation of lambda constructs, but we would have expected the execution to have fallen back to the Hotspot compiler/interpreter instead of simply failing.
> Any workarounds for this?
> 
> public class Twelve{
>   interface SAM{
>      void run(int _id);
>   }
> 
>   public static void For(int _count, SAM _sam){
>      for (int id = 0; id<_count; id++){
>         _sam.run(id);
>      }
>   }
> 
>   public static void main(String[] _args) {
>      For(12, value ->{System.out.printf("%d * %d = %d\n", value, 12, (value*12));});
>   }
> }
> 
> Exception in thread "main" java.lang.ClassFormatError: This JVM does not support constant tag 18 in class file com/amd/aparapi/sample/mandel/Main
>        at java.lang.ClassLoader.defineClass1(Native Method)
>        at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
>        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>        at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)
>        at java.net.URLClassLoader.access$100(URLClassLoader.java:64)
>        at java.net.URLClassLoader$1.run(URLClassLoader.java:354)
>        at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
>        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
>        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
>        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:491)
> 
> 
>