RFR: 8362304: Fix JDWP spec w.r.t. OPAQUE_FRAME and INVALID_SLOT errors [v2]

[Chris Plummer]

> StackFrame.SetValues, StackFrame.GetValues, ThreadReference.PopFrames, and ThreadReference.ForceEarlyReturn all need updated language related to OPAQUE_FRAME error.
> 
> (1) The spec for JVMTI says the following for GetLocalsXXX and SetLocalsXXX
> 
>   The implementation is unable to set the frame locals
>   (e.g. the frame at depth is executing a native method).
> 
> However, the JDWP StackFrame.SetValues and GetValues commands only mention OPAQUE_FRAME for SetValues when not called for the topmost frame of a virtual thread suspended at an event. I don't think there is anything to prevent OPAQUE_FRAME due to the thread being native or some other reason as mentioned in the JVMTI spec. The JDWP spec should be updated to reflect this.
> 
> (1) The spec for JVMTI says the following for PopFrame and ForceEarlyReturn:
> 
>   The implementation is unable to force the current frame to return
>   (e.g. current frame is executing a native method).
> 
> However, the JDWP ThreadReference.PopFrames, and ThreadReference.ForceEarlyReturn commands only mention OPAQUE_FRAME when this commands are not called for the topmost frame of a virtual thread suspended at an event. I don't think there is anything to prevent OPAQUE_FRAME due to the thread being native or some other reason as mentioned in the JVMTI spec. The JDWP spec should be updated to reflect this.
> 
> (3) Another issue is that INVALID_SLOT is missing in the JDWP spec for SetValues, but is there for GetValues. It should be mentioned for both commands.

Chris Plummer has updated the pull request incrementally with one additional commit since the last revision:

  make workding more like JVMTI spec

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/26336/files
  - new: https://git.openjdk.org/jdk/pull/26336/files/27bfb72a..b99935a0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26336&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26336&range=00-01

  Stats: 16 lines in 1 file changed: 0 ins; 7 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/26336.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26336/head:pull/26336

PR: https://git.openjdk.org/jdk/pull/26336