RFR: 8373615: Improve HotSpot debug functions findclass() and findmethod

[Matias Saavedra Silva]

On Fri, 12 Dec 2025 16:40:24 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> I used the `findclass` and `findmethod` functions in debug.cpp  a lot when debugging problems with class metadata.
> 
> https://github.com/openjdk/jdk/blob/6ec36d348b1eaeedb993a905e42650242fac0918/src/hotspot/share/utilities/debug.cpp#L583-L603 
> 
> This REF improves these functions by:
> 
> - Sorting the names of classes and methods
> - Allow "." to be used in class names. So both `findclass("java.lang.Object")` and `findclass("java/lang/Object")` would work
> - Print the C++/Java objects that represent classes and methods.

Looks good, thanks for updating this tool! I have one nit below but otherwise this looks great

src/hotspot/share/classfile/classPrinter.cpp line 111:

> 109:   }
> 110: 
> 111:   static int compare_klasses_alphadetically(InstanceKlass** a, InstanceKlass** b) {

Typo here:
alphadetically -> alphabetically

You might even want to use alphanumerically or even just "by name" as klasses can have numbers or other characters in their name.

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Marked as reviewed by matsaave (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28796#pullrequestreview-3572745279
PR Review Comment: https://git.openjdk.org/jdk/pull/28796#discussion_r2614920850