On Wed, 19 Feb 2025 16:19:22 GMT, Chen Liang <li...@openjdk.org> wrote:
>> src/java.base/share/classes/java/lang/Class.java line 1287:
>>
>>> 1285: */
>>> 1286: public Class<?> getComponentType() {
>>> 1287: // Only return for array types. Storage may be reused for
>>> Class for instance types.
>>
>> I don't see any changes to componentType related to reuse. So was this
>> comment and the code below already obsolete?
>
> It was. Before the componentType field was reused for the class
> initialization monitor int array, and it caused problems with core reflection
> if a program reflectively accesses this field after a few hundred times. See
> [JDK-8337622](https://bugs.openjdk.org/browse/JDK-8337622).
Yes, this comment is obsolete. We used to share the componentType mirror with
an internal 'init-lock' but it caused a bug that was fixed. If it's not an
array the componentType is now always null.
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PR Review Comment: https://git.openjdk.org/jdk/pull/23572#discussion_r1962069719
