Gregory,
Gregory Shimansky:
On Thursday 19 October 2006 09:21 Alex Astapchuk wrote:
Mikhail Fursov wrote:
On 10/19/06, Alex Astapchuk <[EMAIL PROTECTED]> wrote:
Pavel,
One more note.
b) About call of java method during compilation time. Jit now make
class loading during compilation.
It means that Jit make call of java method.
So I don't think that it's the other case.
It is different.
The JIT itself does not call Java code.
All what JIT does is calling VM's resolve_{anything}. It's VM who may
execute the Java code during the resolution.
The JIT itself neither has a way to call an arbitrary Java method during
the compilation, neither has an access to JNI functionality.
Sounds reasonable. And this solution joins mine and Pavel's proposals:
JIT calls a VM method to resolve native address for direct call. JIT does
not
I would also add that we can not use any Java-based resolution schemes
at all.
(Here I mean anything that implies execution of managed code during
compilation in order to resolve the things).
Doing so we would dig a huuuuge grave for ourselves: we'll get a number
of dead lock issues, as such a scheme will add a sporadic and random
locks inside a normal Java control flow. Exactly the same issue as we
had with mixing native and Java locks in the same control flow.
I didn't read the beginning of this thread (it is huge!) so forgive my
Well, ok, here is its content in short: in previous series of the thread
we were talking about a very special native methods. It has nothing to
do with regular Java or JNI methods.
ignorance. Do you mean normal Java method resolution which is done for all
methods native and Java, or do you mean some special "native helper address
resolution" where you a priori know that method is native and normal Java
resolution was successfully done for it already?
I think in this case "native helper address resolution" would not perform any
Java calls, it would be a simple lookup through native libraries loaded by
Pavel's proposal was *to perform* the Java or JNI call.
the class loader which was used to load the class which owns the method where
you want to inline a helper.
The helpers we are talking about may have nothing to do neither with
ClassLoading machinery, nor with a libraries already loaded by Java.
--
Thanks,
Alex
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