RFR: 8290834: Improve potentially confusing documentation on collection of profiling information [v6]

[Julian Waters]

On Fri, 22 Jul 2022 07:41:09 GMT, Julian Waters <jwaters at openjdk.org> wrote:

>> src/hotspot/share/compiler/compilationPolicy.hpp line 48:
>> 
>>> 46:  * all data from the MDO will be loaded into the ciMethodData when it is first created.
>>> 47:  * (See ciMethod::method_data() in ciMethod.cpp for more details)
>>> 48:  *
>> 
>> The ciMethodData is just a temporary snapshot.  Updates to the profiling data is still done through the MethodData.
>
> The only place I could find a MethodData being created is in the method
> 
> // Build a MethodData* object to hold information about this method
> // collected in the interpreter.
> void Method::build_interpreter_method_data(const methodHandle& method, TRAPS)
> 
> which presumably constructs a MethodData for profiling in the Interpreter. Is there a different area where it's created (when profiling with C1) that I missed?

hopefully resolved by the newest changes

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PR: https://git.openjdk.org/jdk/pull/9598