bug: breakpoints in in an anonymous class method executed on a virtual thread callstack are skipped

[Chris Plummer]

Writing a test case in jtreg would be very helpful. 
test/jdk/com/sun/jdi/BreakpointTest.java would be a good starting point 
for a new test. Note however this might be an IDE interaction issue, and 
you might not be successful in writing a jtreg test case the reproduces 
the problem. But that in itself would be useful to know.

Chris

On 6/29/23 2:23 PM, Ben Berman wrote:
> Investigating an issue in both IntelliJ and Eclipse debuggers led to 
> this bug: I can't break inside an anonymous class method of the form
>
> ```
> new Object() {
>   void test() {
>     System.out.println("breakpoint here does not work");
>   }
> }.test();
> ```
>
> due to a buggy interaction between JDWP and virtual threads. The 
> console statement in the example above does indeed print, i.e. it is 
> executed.
>
> What would the next steps be to help with investigating and resolving 
> this issue?
>
> https://youtrack.jetbrains.com/issue/IDEA-324002/IntelliJ-debugger-doesnt-break-nor-does-Eclipse-in-a-virtual-threads-project-inside-anonymous-class-methods-reproduction?clearDraft=true&description=%0A%0AIU-231.9161.38,%20JRE%2017.0.7%2B10-b829.16x64%20JetBrains%20s.r.o 
> <https://youtrack.jetbrains.com/issue/IDEA-324002/IntelliJ-debugger-doesnt-break-nor-does-Eclipse-in-a-virtual-threads-project-inside-anonymous-class-methods-reproduction?clearDraft=true&description=%0A%0AIU-231.9161.38,%20JRE%2017.0.7%2B10-b829.16x64%20JetBrains%20s.r.o>.,%20OS%20Mac%20OS%20X(aarch64)%20v13.4,%20screens%203456.0x2234.0;%20Retina