On Tue, 22 Nov 2022 14:48:11 GMT, Afshin Zafari <d...@openjdk.org> wrote:

> test of tier1-5 passed.

src/hotspot/share/prims/jvmtiTagMapTable.hpp line 41:

> 39:   JvmtiTagMapEntry* next() const {
> 40:     return (JvmtiTagMapEntry*)HashtableEntry<WeakHandle, 
> mtServiceability>::next();
> 41:   }

This should add a comment above JvmtiTagMapEntry that the entry is the key 
(could be renamed JvmtiTagMapKey).  Also add a comment above that the oop is 
needed for lookup rather than creating a WeakHandle during lookup because the 
HeapWalker may walk soon to be dead objects and creating a WeakHandle for an 
otherwise dead object makes G1 unhappy.

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PR: https://git.openjdk.org/jdk/pull/11288

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