Bug ID: JDK-8294960 Convert java.base/java.lang.invoke package to use the Classfile API to generate lambdas and method handles

Type: Sub-task
Component: core-libs
Sub-Component: java.lang.classfile

Priority: P4
Status: Resolved
Resolution: Fixed

Submitted: 2022-10-07
Updated: 2025-05-16
Resolved: 2024-06-19

JDK 24
24 b03Fixed

classes using ASM library in java.lang.invoke package are:
- ClassSpecializer
- GenerateJLIClassesHelper
- InnerClassLambdaMetafactory
- InvokerBytecodeGenerator
- MethodHandleImpl
- MethodHandles
- TypeConvertingMethodAdapter

A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/17108 Date: 2023-12-14 12:39:52 +0000
16-05-2025
We are seeing a new ClassCastException after this change. Not sure if the behavioral change is intentional, but I have filed JDK-8335060 with a simple reproducer.
25-06-2024
Hi Adam, since this change we get a bunch of test failures on big endian platforms (see JDK-8334872) because of StackOverflowError. Are there parts that need to be adapted for big endian platforms? Thanks, Richard.
24-06-2024
I'm not familiar with `redefineagent.jar`, however from the stack trace I see `InvokerBytecodeGenerator`, which was redesigned by this change.
21-06-2024
Does this change influence the redefineagent.jar used in test serviceability/jvmti/RedefineClasses/RedefineLeakThrowable.java#id0 ? Today we start to see Metaspace OOMs in this test on AIX (the test uses a -XX:MetaspaceSize=23m and is known to be close to this setting so a small increase in consumption could trigger the MetaSpace OOM). Example OOM : Caused by: java.lang.OutOfMemoryError: Metaspace at java.base/java.lang.ClassLoader.defineClass0(Native Method) at java.base/java.lang.System$2.defineClass(System.java:2476) at java.base/java.lang.invoke.MethodHandles$Lookup$ClassDefiner.defineClass(MethodHandles.java:2480) at java.base/java.lang.invoke.InvokerBytecodeGenerator.loadMethod(InvokerBytecodeGenerator.java:255) at java.base/java.lang.invoke.InvokerBytecodeGenerator.generateCustomizedCode(InvokerBytecodeGenerator.java:533) at java.base/java.lang.invoke.LambdaForm.compileToBytecode(LambdaForm.java:855) at java.base/java.lang.invoke.LambdaForm.customize(LambdaForm.java:474) at java.base/java.lang.invoke.MethodHandle$1.apply(MethodHandle.java:1858) at java.base/java.lang.invoke.MethodHandle$1.apply(MethodHandle.java:1856) at java.base/java.lang.invoke.MethodHandle.updateForm(MethodHandle.java:1878) at java.base/java.lang.invoke.MethodHandle.customize(MethodHandle.java:1856) at java.base/java.lang.invoke.MethodHandle.maybeCustomize(MethodHandle.java:1846) at java.base/java.lang.invoke.Invokers.maybeCustomize(Invokers.java:632) at java.base/java.lang.invoke.Invokers.checkCustomized(Invokers.java:626) at java.base/java.lang.invoke.LambdaForm$MH/0x0000000680082800.invokeExact_MT(LambdaForm$MH) at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.invokeImpl(DirectConstructorHandleAccessor.java:86) at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:501) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:485) at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(ServiceLoader.java:785) at java.base/java.util.ServiceLoader$ProviderImpl.get(ServiceLoader.java:725) at java.base/java.util.ServiceLoader$3.next(ServiceLoader.java:1397) at java.compiler@24-internal/javax.tools.ToolProvider.getSystemTool(ToolProvider.java:120) at java.compiler@24-internal/javax.tools.ToolProvider.getSystemJavaCompiler(ToolProvider.java:62) at jdk.test.lib.compiler.InMemoryJavaCompiler.getCompiler(InMemoryJavaCompiler.java:199) at jdk.test.lib.compiler.InMemoryJavaCompiler.compile(InMemoryJavaCompiler.java:187) at RedefineClassHelper.redefineClass(RedefineClassHelper.java:50) at RedefineLeakThrowable.main(RedefineLeakThrowable.java:80) at java.base/java.lang.invoke.LambdaForm$DMH/0x000000068008e800.invokeStatic(LambdaForm$DMH) at java.base/java.lang.invoke.LambdaForm$MH/0x000000068008fc00.invoke(LambdaForm$MH) at java.base/java.lang.invoke.LambdaForm$MH/0x0000000680090000.invokeExact_MT(LambdaForm$MH) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:154)
21-06-2024
Changeset: 01ee4241 Author: Adam Sotona <asotona@openjdk.org> Date: 2024-06-19 15:15:30 +0000 URL: https://git.openjdk.org/jdk/commit/01ee4241b76e78ca67803c4b083fcedecef1c96c
19-06-2024
Draft of prototype pull request: https://github.com/openjdk/jdk/pull/17108
15-12-2023
This use case has been included in the Classfile API development, see: https://github.com/openjdk/jdk-sandbox/tree/classfile-api-dev-branch#use-cases
07-10-2022

Blocks :	JDK-8331414 - java.lang.classfile.Attributes class performs a lot of static initializations
Duplicate :	JDK-8309611 - Speed up MethodType::describeConstable
Relates :	JDK-8335533 - OutOfMemoryError: Metaspace observed again on AIX in test RedefineLeakThrowable.java after JDK-8294960
Relates :	JDK-8334872 - BigEndian: java/lang/invoke/condy Tests failing since JDK-8294960
Relates :	JDK-8335060 - ClassCastException after JDK-8294960
Relates :	JDK-8338542 - Umbrella - Reduce startup overhead associated with migration to ClassFile API
Relates :	JDK-8338820 - Small startup regression after JDK-8294960
Relates :	JDK-8334771 - [TESTBUG] Run TestDockerMemoryMetrics.java with -Xcomp fails exitValue = 137
Relates :	JDK-8342620 - Performance regression in Rubykon JRuby benchmark after JDK-8294960
Relates :	JDK-8334545 - runtime/ClassInitErrors/TestStackOverflowDuringInit.java fails after JDK-8294960