System.java Development Question

[Claes Redestad]

On 2018-08-04 14:29, mr rupplin wrote:
> Any help?

I think it would help if you described what you're trying to achieve, 
rather than the current stumbling block.[0]

Reading between the lines then it seems you're trying to add some kind 
of adhoc allocation profiling, so I wonder if you've seen the Low 
Overhead Heap-Profiling work that went into jdk/jdk just a few weeks 
ago?[1]

If it doesn't fit your use-case - or you really need something like it 
applied to JDK 9 - it might still be good advice to study the code and 
approach taken there before reverse-engineering the entire OpenJDK 
source code... :-)

/Claes

[0] https://en.wikipedia.org/wiki/XY_problem
[1] Initial implementation: 
http://hg.openjdk.java.net/jdk/jdk/rev/e2a7f431f65c
Impl RFE: https://bugs.openjdk.java.net/browse/JDK-8203394
JEP: https://bugs.openjdk.java.net/browse/JDK-8203394

(See the JEP for follow-up bug fixes you'd need to consider if you'd 
ever attempt to backport this)