Bug ID: 6868487 EnableInvokeDynamic and EnableMethodHandles should not be visible flags in JDK6 or JDK7

6868487 : EnableInvokeDynamic and EnableMethodHandles should not be visible flags in JDK6 or JDK7

Details

Type:	Bug	Submit Date:	2009-08-04
Status:	Closed	Updated Date:	2011-03-08
Project Name:	JDK	Resolved Date:	2011-03-08
Component:	hotspot	OS:	generic
Sub-Component:	compiler	CPU:	generic
Priority:	P3
Resolution:	Fixed
Affected Versions:	7
Fixed Versions:	hs16

Related Reports

Backport:	JDK-2181937 - EnableInvokeDynamic and EnableMethodHandles should not be visible flags in JDK6 or JDK7
Backport:	JDK-2182194 - EnableInvokeDynamic and EnableMethodHandles should not be visible flags in JDK6 or JDK7
Relates:	JDK-6817525 - turn on method handle functionality by default for JSR 292

Sub Tasks

Description

The flags EnableInvokeDynamic and EnableMethodHandles need to be categorized as experimental in the JDK6 VM (and off by default).

In a later build of JDK7, the fix for bug 6817525 will turn on those flags (both of them) by default, and at the same time recategorize them as diagnostic.

Comments

EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/bd2b1f617a4e

2009-08-10

EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/bd2b1f617a4e

2009-08-07

SUGGESTED FIX

diff --git a/src/share/vm/runtime/globals.hpp b/src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp
+++ b/src/share/vm/runtime/globals.hpp
@@ -3316,7 +3316,7 @@
   product(bool, AnonymousClasses, false,                                    \
           "support sun.misc.Unsafe.defineAnonymousClass")                   \
                                                                             \
-  product(bool, EnableMethodHandles, false,                                 \
+  experimental(bool, EnableMethodHandles, false,                            \
           "support method handles (true by default under JSR 292)")         \
                                                                             \
   diagnostic(intx, MethodHandlePushLimit, 3,                                \
@@ -3331,7 +3331,7 @@
   diagnostic(bool, OptimizeMethodHandles, true,                             \
           "when constructing method handles, try to improve them")          \
                                                                             \
-  product(bool, EnableInvokeDynamic, false,                                 \
+  experimental(bool, EnableInvokeDynamic, false,                            
           "recognize the invokedynamic instruction")                        \
                                                                             \
   develop(bool, TraceInvokeDynamic, false,                                  \

2009-08-04

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