newbie startup question

[Raffaello Giulietti]

Marcelo Fukushima wrote:
> On Wed, Jul 15, 2009 at 11:29 AM, Raffaello
> Giulietti<raffaello.giulietti at gmail.com> wrote:
>> Christian Thalinger wrote:
>>> Raffaello Giulietti wrote:
>>>> Hello,
>>>>
>>>> I'd like to start playing with da Vinci, in particular with the java.dyn
>>>> classes (InvokeDynamic, CallSite, MethodHandle, etc.)
>>>>
>>>> They seem to be included in the more recent "Java Platform, Standard
>>>> Edition 7 Binary Snapshot Releases" found at
>>>> http://download.java.net/jdk7/binaries/. So I'm wondering if they are
>>>> complete enough and usable or if I shall build Da Vinci from the
>>>> Mercurial repos.
>>> Yes, current builds have JSR 292 support, although it's not complete.
>> I just successfully compiled and ran a tiny program with one
>> InvokeDynamic call site and the bootstrap method. I did the build in
>> NetBeans but had to execute the program on the command line. Running
>> inside NetBeans doesn't work right, probably because NB sees confusing
>> errors in the source.
>>
>>> One major point is that there is no compiler support and you have to run
>>> your programs with the interpreter (-Xint).  This, plus some other
>>> fixes, has been fixed in the mlvm repository.
>>>
>> I guess you mean JIT compiler support, not javac.
>>
>> Seems to work even without -Xint (but, of course, not without
>> -XX:+EnableInvokeDynamic). What are the problems that -Xint is supposed
>> to circumvent?
> 
> i think he meant that invoke dynamic (also refered to 'indy' on this
> list) does not work on compiled mode (JIT compiled that is)
> 

Marcelo,

as I explained, I can run my example even *without* -Xint, i.e., with
the JIT enabled. But perhaps the example is so small that the JIT
doesn't even start its duties. Anyway, good to know that -Xint exists as
a workaround for possible crashes of the JIT.