1 6655638: dynamic languages need method handles

        2 Summary: MethodHandle and related types, precursor to invokedynamic

        3 

        4 http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6655638

        5 

        6 Features:

        7 - JVM support for method handles

        8 - enabled via -XX:+MethodHandleSupport

        9 - method handle types implemented:

       10 - * direct method handles (all cases of invoke{static,special,virtual,interface})

       11 - * bound method handles for any argument (any position, of type ref/int/long)

       12 - * non-blocking argument conversion adapters: null retype, checkcast, prim-to-prim, ref-to-prim

       13 - * argument motion adapters: duplicate, delete, swap, rotate argument(s)

       14 - * non-blocking unbox and varargs adapters: unbox from wrapper, spread from reference array

       15 - method handle types not implemented (must be created via Java code):

       16 - * prim-to-prim when float and non-float types are mixed (matrix is incomplete)

       17 - * blocking adapters: prim-to-ref argument (boxing), varargs collection

       18 - * flyby, ricochet (complex blocking combinators, require arglist abstraction)

       19 - JIT support: NYI (uses compiled-to-interpreted calling sequences currently)

       20 

       21 Authors:

       22 - John Rose (Sun)

       23 - JSR 292 EG

       24 

       25 Tests:

       26 - unit tests in hotspot/src/share/projects/meth/test

       27 

       28 Incremental testing:

       29 This does not require a full JDK build.

       30 

       31 $ cp -pr hotspot/src/share/projects/meth /tmp/meth

       32 $ cp -pr hotspot/src/share/projects/anonk /tmp/anonk

       33 $ cd /tmp/anonk

       34 $ ant compile

       35 $ cd /tmp/meth

       36 $ ant compile

       37 $ cat README.txt | sed '/--------/q'