Hi John,
thank you for your answer. As I said before, I do understand the
concept behind resolving lambda expressions at runtime to not
represent "real classes". I do however still disagree with your
assertion. On the opposite, I argue that the fact that nobody can
expect a certain form of impleme
VM anonymous classes are an implementation detail that is
opaque to system components except for the lowest layers of
the JDK runtime and the JVM itself. Transformers and other
instrumentation should not look inside them expecting to interpose
on their behavior. Ideally we should not make them vi
>> Slightly off-topic, about ASM, when you create a ClassWriter [1], you
>>> can pass a ClassReader of an existing class, in that case ASM copy the
>>> constant pool from the class reader to the class writer so the constant
>>> pool is preserved.
>>>
>&
ot;Rafael Winterhalter"
>> À: "Rémi Forax"
>> Cc: "Vladimir Ivanov" , "Coleen Phillimore"
>> ,
>> core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com Spitsyn"
>> , "Daniel
>> Daugherty"
>>
t%29
- Mail original -
De: "Vladimir Ivanov"
À: "Rafael Winterhalter"
Cc: "Coleen Phillimore" ,
core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com
Spitsyn" , "Daniel Daugherty"
Envoyé: Vendredi 22 Janvier 2016 18:47:31
Objet: Re:
t;
> Cc: "Vladimir Ivanov" , "Coleen Phillimore"
> ,
> core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com Spitsyn"
> , "Daniel
> Daugherty"
> Envoyé: Mardi 26 Janvier 2016 10:30:54
> Objet: Re: ClassFileTransformer does not apply to
Winterhalter"
>> À: "Remi Forax"
>> Cc: "Vladimir Ivanov" , "Coleen Phillimore"
>> ,
>> core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com Spitsyn"
>> , "Daniel
>> Daugherty"
>> Envoyé: L
Daniel
> Daugherty"
> Envoyé: Lundi 25 Janvier 2016 20:24:01
> Objet: Re: ClassFileTransformer does not apply to anonymous classes
>
> Hi Vladmir, hello Remi,
>
> what bothers me about instrumenting a lambda expression's target
> method is the difficulty of locating the me
On 26/01/16 08:39, Rafael Winterhalter wrote:
> Another note on this subject: I found that applying a
> reretransformation on a lambda expression's class does not provide the
> original class file to the retransformer but the class file that
> resulted from a previous retransformation. (If a lambda
sm.ClassReader,%20int%29
>>
>> - Mail original -----
>>> De: "Vladimir Ivanov"
>>> À: "Rafael Winterhalter"
>>> Cc: "Coleen Phillimore" ,
>>> core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com
>&g
er"
>> Cc: "Coleen Phillimore" ,
>> core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com
>> Spitsyn" , "Daniel Daugherty"
>>
>> Envoyé: Vendredi 22 Janvier 2016 18:47:31
>> Objet: Re: ClassFileTransformer does not apply to anon
De: "Vladimir Ivanov"
> À: "Rafael Winterhalter"
> Cc: "Coleen Phillimore" ,
> core-libs-dev@openjdk.java.net, "serguei.spit...@oracle.com
> Spitsyn" , "Daniel Daugherty"
>
> Envoyé: Vendredi 22 Janvier 2016 18:47:31
> Objet
Rafael,
First of all, I'd like to agree on the terminology. There's some
confusion there. Anonymous term is ambiguous in Java. There are
anonymous classes on language level and there's
Unsafe.defineAnonymousClass() which produce anonymous-in-VM-sense
classes. I prefer to call them VM anonymou
Hi Vladimir,
thank you for your response. While I completely understand your view
from a VM implementor's point of view, as a practicioner I would
recommend against it. Not being able to instrument lambda expressions
puts a severe limitation onto using the instrumentation API
alltogether. For exam
Rafael,
What you are seeing are just consequences. My impression is that VM
anonymous class redefinition/retransformation works mostly by accident.
The real problem is that current API (both JVMTI and
java.lang.instrument) doesn't serve for them well.
When VM anonymous class is defined, a u
You are right. It is observed for all JDK8u releases and persists in
the current builds of JDK9.
Best regards, Rafael
2016-01-22 16:15 GMT+01:00 Daniel D. Daugherty :
> On 1/22/16 7:29 AM, Alan Bateman wrote:
>>
>>
>> On 22/01/2016 14:00, Coleen Phillimore wrote:
>>>
>>> Can you send the question
On 1/22/16 7:29 AM, Alan Bateman wrote:
On 22/01/2016 14:00, Coleen Phillimore wrote:
Can you send the question again? I didn't see it. I also mostly
look at JVM code and rarely deal with the Java side.
The question was asked about ClassFileTransformer which is implemented
by the JPLIS age
On 22/01/2016 14:00, Coleen Phillimore wrote:
Can you send the question again? I didn't see it. I also mostly look
at JVM code and rarely deal with the Java side.
The question was asked about ClassFileTransformer which is implemented
by the JPLIS agent via the JVM TI CFLH event. So I think
Hi Coleen, thanks for looking into this. My original mail was the following:
Hello everybody,
classes that are loaded via Unsafe::defineAnonymousClass are not
transformed by a registered ClassFileTransformer. At the same time, it
is possible to retransform / redefine such an anonymous classes usi
On 1/22/16 4:11 AM, Andrew Dinn wrote:
On 21/01/16 22:14, Rafael Winterhalter wrote:
Hi Andrew,
if there is any update on the matter, I would of course love to hear about it.
Unfortunately, I never received an answer to my question, but maybe I
picked the wrong list.
Thank you for your support
On 21/01/16 22:14, Rafael Winterhalter wrote:
> Hi Andrew,
> if there is any update on the matter, I would of course love to hear about it.
> Unfortunately, I never received an answer to my question, but maybe I
> picked the wrong list.
> Thank you for your support on this issue!
I'm pretty sure t
Hi Andrew,
if there is any update on the matter, I would of course love to hear about it.
Unfortunately, I never received an answer to my question, but maybe I
picked the wrong list.
Thank you for your support on this issue!
Regards, Rafael
2016-01-21 10:07 GMT+01:00 Andrew Dinn :
> Hi Rafael,
>
>
Hi Rafael,
On 01/12/15 12:45, Rafael Winterhalter wrote:
> I can tell that this behavior has not only affected me as I had this
> question comming up by multiple users of my open-source code generation
> library.
>
> What is your view on this?
>
> Thank you for your feedback!
I have an interest
Hello everybody,
classes that are loaded via Unsafe::defineAnonymousClass are not
transformed by a registered ClassFileTransformer. At the same time, it is
possible to retransform / redefine such an anonymous classes using the
instrumentation API.
Here is a rather confusing bug that I encountered
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