RFR: 8319873: Add windows implementation for jcmd System.map and System.dump_map [v7]

[Simon Tooke]

On Thu, 22 Aug 2024 16:28:19 GMT, Simon Tooke <stooke at openjdk.org> wrote:

>> src/hotspot/os/windows/memMapPrinter_windows.cpp line 162:
>> 
>>> 160:     outputStream* st = session.out();
>>> 161:     os::print_os_info(st);
>>> 162:     os::print_memory_info(st);
>> 
>> The "danger" here is that both of these functions may bloat in the future and print a lot more than today; and that we may want to use this printout in places where we also print out OS info and memory info, and therefore get duplicated printout (e.g. hs-err printing or jcmd VM.info). 
>> 
>> But I would print out the number of mappings you counted, and the total size of committed regions.
>
> I have rolled my own "print_os_info" from the utility functions, but have left print_memory_info in for now - if you want, I will remove it entirely, but I think the information provided is valuable to readers of this report.

I've also printed the region count.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20597#discussion_r1733427765