Integrated: 8315810: Reimplement sun.reflect.ReflectionFactory::newConstructorForSerialization with method handles

Mandy Chung mchung at openjdk.org
Thu Sep 14 16:13:50 UTC 2023


On Wed, 6 Sep 2023 18:34:29 GMT, Mandy Chung <mchung at openjdk.org> wrote:

> This reimplements `sun.reflect.ReflectionFactory::newConstructorForSerialization` with method handles.
> 
> This API currently generates the bytecode which fails the verification because `new C; invokespecial A()` where the given class `C` and invoke a no-arg constructor of `C`'s first non-`Serializable` superclass `A` is not a valid operation per the VM specification. VM special cases the classes generated for reflection to skip verification for the constructors generated for serialization and externalization.  This change will allow such VM hack to be removed.
> 
> A `jdk.reflect.useOldSerializableConstructor` system property can be set to use the old implementation in case if customers run into any compatibility issue.   I expect this change has very low compatibility risk.   This system property is undocumented and will be removed in a future release.

This pull request has now been integrated.

Changeset: 5cea53d3
Author:    Mandy Chung <mchung at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/5cea53d372744ddf1bedaae4667415e6525ef82f
Stats:     151 lines in 10 files changed: 111 ins; 11 del; 29 mod

8315810: Reimplement sun.reflect.ReflectionFactory::newConstructorForSerialization with method handles

Co-authored-by: Chen Liang <liach at openjdk.org>
Reviewed-by: rriggs

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PR: https://git.openjdk.org/jdk/pull/15600


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