Reference to a document in the sources

[David Holmes]

On 13/06/2018 10:32 PM, Gilles Duboscq wrote:
> Hi Ivan,
> 
> I don't know for sure what that file contains but it's probably very similar to the content of this paper: Fast subtype checking in the HotSpot JVM [1].

That seems like a good bet. The comment was added in September 2001 - by 
Cliff Click.

I can't find any trace of the actual file though.

Cheers,
David

>   Gilles
> 
> [1]: https://dl.acm.org/citation.cfm?id=583821
> 
> On 13/06/18 14:20, Ivan Krylov wrote:
>> Hi all,
>>
>> In the sources for klass.hpp [1] there is a reference to some discussion
>>
>> // The fields _super_check_offset, _secondary_super_cache, _secondary_supers
>> // and _primary_supers all help make fast subtype checks. See big discussion
>> // in doc/server_compiler/checktype.txt
>>
>> This reference is present in JDK 11 latest sources however this comment dates back to as far as I can trace (1.7).
>> I assume this link is to some internal wiki page. Is it possible to make it publicly visible somehow? It is understood that the content is likely to be outdated.
>>
>> Thanks,
>> Ivan
>>
>> [1] - http://hg.openjdk.java.net/jdk/jdk/file/7bf4f1b5e438/src/hotspot/share/oops/klass.hpp#l105
>>
>>
>>
>>