RFR: 8200559: Java agents doing instrumentation need a means to define auxilary classes

[Rafael Winterhalter]

Not by my understanding. A suitable lookup requires a loaded class for the
package. A Java agent might however not provide a handle for a class that
is not yet loaded. Or how would you suggest to approach this?

Am Fr., 16. Apr. 2021 um 16:21 Uhr schrieb Remi Forax <forax at univ-mlv.fr>:

> ----- Mail original -----
> > De: "Rafael Winterhalter" <winterhalter at openjdk.java.net>
> > À: "core-libs-dev" <core-libs-dev at openjdk.java.net>,
> "serviceability-dev" <serviceability-dev at openjdk.java.net>
> > Envoyé: Vendredi 16 Avril 2021 15:52:07
> > Objet: RFR: 8200559: Java agents doing instrumentation need a means to
> define auxilary classes
>
> > To allow agents the definition of auxiliary classes, an API is needed to
> allow
> > this. Currently, this is often achieved by using `sun.misc.Unsafe` or
> > `jdk.internal.misc.Unsafe` ever since the `defineClass` method was
> removed from
> > `sun.misc.Unsafe`.
>
> You can already use Lookup.defineClass() + privateLookupIn() +
> Instrumentation.redefineModule() for that ?
>
> Rémi
>
> >
> > -------------
> >
> > Commit messages:
> > - 8200559: Java agents doing instrumentation need a means to define
> auxiliary
> > classes
> >
> > Changes: https://git.openjdk.java.net/jdk/pull/3546/files
> > Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3546&range=00
> >  Issue: https://bugs.openjdk.java.net/browse/JDK-8200559
> >  Stats: 185 lines in 4 files changed: 185 ins; 0 del; 0 mod
> >  Patch: https://git.openjdk.java.net/jdk/pull/3546.diff
> >  Fetch: git fetch https://git.openjdk.java.net/jdk
> pull/3546/head:pull/3546
> >
> > PR: https://git.openjdk.java.net/jdk/pull/3546
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mail.openjdk.java.net/pipermail/serviceability-dev/attachments/20210416/0dca8db3/attachment-0001.htm>