[External] : Re: JEP 411, removal of finalizers, a path forward.

Ron Pressler ron.pressler at oracle.com
Tue Aug 3 08:31:23 UTC 2021

> On 3 Aug 2021, at 02:30, Peter Firmstone <peter.firmstone at zeus.net.au> wrote:
> I am still hopeful that OpenJDK might create some hooks for us and keep the AccessController, AccessControlContext and Subject.doAs methods to make supporting all Java versions easier.

When I mentioned “hooks” I was referring to something along the lines of a callback when a file is

> Just curious, when using Agents, what are the recommendations for line numbers in code, for exceptions etc, how are these affected when instrumenting?

When you transform a class, you basically replace its content with new content, so the short answer is 
that what happens to line numbers is whatever you want. If you’re using ASM for your transformation and 
ignore line numbers, which ASM represents as a kind of no-op instructions, then what would usually happen 
is that if original instruction X is mapped to line N and when transforming the stream you replace X with 
YXZ, then all of YXZ will remain mapped to line N.

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