RFR(S): 8037970: make PrintMethodData a diagnostic options

[Roland Westrelin]

I’d like to make PrintMethodData a diagnostic option. When investigating nashorn performance, I found it useful to have the result of profiling.

This change also:

- changes the format of PrintMethodData to use:

java.lang.invoke.DirectMethodHandle::internalMemberName

instead of

java/lang/invoke/DirectMethodHandle.internalMemberName

for method names. Very useful for lambda forms: java.lang.invoke.LambdaForm$BMH/853119666::reinvoke

- dumps data for all methods including lambda forms

In debug builds, the print compiler oracle command can also cause profile data to be dumped for a particular method. In a product build, I restricted it to PrintMethodData only so when don’t iterate over all methods every time the JVM exits.

http://cr.openjdk.java.net/~roland/8037970/webrev.00/

Roland.