RFR: 8266642: improve ResolvedMethodTable hash function [v2]

[Denghui Dong]

On Mon, 10 May 2021 05:40:50 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Denghui Dong has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   minor adjustment
>
> test/hotspot/jtreg/runtime/MemberName/ResolvedMethodTableHash.java line 57:
> 
>> 55:         byte[] buf = new byte[100];
>> 56:         int size = writeClass(buf, "MH$$");
>> 57:         Class<?> cls = Unsafe.getUnsafe().defineAnonymousClass(ResolvedMethodTableHash.class, Arrays.copyOf(buf, size), null);
> 
> Why do we need to use Unsafe for this rather the public Lookup.defineHiddenClass API?

Because here needs different class loader data to load the different classes with the same name, I think Unsafe API is a simple way to achieve this purpose.

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

PR: https://git.openjdk.java.net/jdk/pull/3901