On Tue, 18 Aug 2026 13:13:23 GMT, Casper Norrbin <[email protected]> wrote:

>> Hi everyone, `ClassPrintLayout::class_print_layout` expects internal class 
>> names as its argument, but is called externally by users through `jcmd`. 
>> This leads to inconsistencies with other commands. For example:
>> 
>> 
>> jcmd <pid> VM.class_hierarchy java.lang.String
>> jcmd <pid> VM.class_print_layout java/lang/String
>> 
>> 
>> In addition, the command's output is also in the internal format. This 
>> should be changed to also use the external dotted class name instead. To 
>> resolve this, I added a conversion step that replaces external dotted names 
>> with internal slashed names in-place before we start searching for classes. 
>> That way we avoid extra allocations and string comparisons. As a side 
>> effect, this now works on both internal and external names, as slashes are 
>> left untouched.
>> 
>> This was a previously approved PR in 
>> https://github.com/openjdk/valhalla/pull/2375, but did not get integrated in 
>> time.
>> 
>> Testing:
>> 
>> - Tier 1
>> - Manual inspection with jcmd
>> 
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the 
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> Casper Norrbin has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   Add resource strcpy

LGTM
Thank you for the changes.

-------------

Marked as reviewed by fparain (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/32396#pullrequestreview-4963360168

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