JDK-8294284 : Loom: make use of frame::is_older() and frame::id() to reduce dependency on growth direction of stacks
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: 20
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2022-09-23
  • Updated: 2024-07-11
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JDK 24
24Unresolved
Related Reports
Blocks :  
JDK-8289925 - Shared code shouldn't reference the platform specific method frame::interpreter_frame_last_sp()
Blocks :  
JDK-8294152 - AArch64: frame::id() and frame::is_older() broken for interpreted frames with large max_stack
Description
jThere are dependencies on the growth direction of stacks in shared Loom code
which could be eliminated by making use of frame::id() and frame::is_older()

Code related to the following elements should be considered

* is_sp_in_continuation()
* JavaThread::_cont_fastpath
* ContinuationEntry::_parent_cont_fastpath

This was suggested while reviewing PR #9411 for JDK-8289925.