As part of the CCC for 6280629 we proposed to update jmap with a -dump option so that a heap dump could be taken from a running VM using the built-in heap dump mechanism. Furthermore the -F option was proposed so that we could force a dump (with SA impplementation) in the case of a complete hung process. The heap dump implementation has been in mustang since b53 and a jmap wrapper needs to be putback to complete things.