jdk9 can not load sa.js automatically in jhsdb

[Liu Xin]

Hello, serviceability mail-list,

Jdk9 refactored the CLI for hsdb. I try to catch you up.  With the latest
openjdk9 build, I always meet the following message when I want to use
'console' in GUI.

./jhsdb hsdb
//attach pid
//windows/console
javax.script.ScriptException: TypeError: sapkg.runtime.VM.getVM is not a
function in sa.js at line number 54
Warning! JS Engine can't start, some commands will not be available

I quickly look at it. It seems that it has problem to load 'sa.js'.
// SA singletons are kept in 'sa' object
var sa = new Object();
sa.vm = sapkg.runtime.VM.getVM();
sa.dbg = sa.vm.getDebugger();
sa.cdbg = sa.dbg.CDebugger;

I strongly suspect that it didn't invoke
 sun.jvm.hotspot.runtime.VM.initialize before loading the sa.js.
is it intentional or just wrong usage of mine?

Please note that I did build nashorn and jjs works perfectly.  I can
reproduce this problem on linux and macosx.

I took reference of the doc of clhsdb shipping with hotspot source code:
hotspot/src/jdk.hotspot.agent/doc/clhsdb.html
is it out of date?  I found it NOT 'Few CLHSDB commands are already
implemented in JavaScript.'

thanks,
--lx
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