JDK-8296336 : Fallback for method handle intrinsic allocation failures
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 20
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2022-11-03
  • Updated: 2024-08-10
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tbdUnresolved
Related Reports
Relates :  
JDK-8295724 - VirtualMachineError: Out of space in CodeCache for method handle intrinsic
Description
While discussing JDK-8295724, the idea came up, to use C2I adapters and the interpreter entries when an attempt to allocate a method handle intrinsic failed because of missing free space in code cache. This would need an interpreter implementation for "_linkToNative" which is currently not available on any platform. In addition, C2I adapters need space in the code cache. We should check if this fallback solution makes sense or if there's another one.
Comments
There's already a precedent in template interpreter to handle native method calls with InterpreterRuntime::slow_signature_handler and SlowSignatureHandler.
04-11-2022
Another idea from @iklam:"Is it possible to have a backup stub? It can trap to c code, do what the method handle intrinsics is supposed to do (by iterating on the signature), and continue execution."
04-11-2022