JDK-8293336 : AOT-linking of invokedynamic for lambda expression and string concat
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: 20
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • Submitted: 2022-09-03
  • Updated: 2024-11-15
  • Resolved: 2024-11-15
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JDK 24
24Resolved
Related Reports
Blocks :  
JDK-8337965 - Add null check to ClaimMetadataVisitingOopIterateClosure::do_cld()
Blocks :  
JDK-8311071 - Avoid SoftReferences in LambdaFormEditor and MethodTypeForm when storing heap objects into AOT cache
Blocks :  
JDK-8293337 - Store method handle intrinsics in AOTCache
Blocks :  
JDK-8293187 - Store initialized Enum classes in AOTCache
Duplicate :  
JDK-8331497 - Implement JEP 483: Ahead-of-Time Class Loading & Linking
Relates :  
JDK-8278540 - Poor string concatenation performance on initial invoke
Relates :  
JDK-8251851 - InvokerBytecodeGenerator::lookupPregenerated does not support all cases
Relates :  
JDK-8341600 - [premain] Automatic aot-init of classes used by java.lang.invoke
Relates :  
JDK-8293979 - Resolve JVM_CONSTANT_Class references at CDS dump time
Description
Resolution of dynamic bytecodes such as invokedynamic and invokehandle requires the creation of many objects such as LambdaForm, MethodType, MethodHandle, etc. Also, in many cases, LambdaForm${MH,DMH} classes are generated dynamically. 

The goal is this RFE is to improve start-up time by generate all these resolution artifacts ahead-of-time during CDS archive creation.
Comments
Fixed as part of JDK-8331497: Implement JEP 483: Ahead-of-Time Class Loading & Linking
15-11-2024
A pull request was submitted for review. Branch: pr/20959 URL: https://git.openjdk.org/jdk/pull/21143 Date: 2024-09-23 18:45:49 +0000
22-10-2024
The current work-in-progress uses the AOTHolder pattern as described in https://mail.openjdk.org/pipermail/leyden-dev/2024-August/000911.html This pattern could be adapted to use @StableValue as proposed in https://openjdk.org/jeps/8312611
17-09-2024