RFR: 8253909: Implement detailed map file for CDS [v2]

[Ioi Lam]

On Tue, 6 Oct 2020 06:44:54 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Feedback from Thomas Stuefe
>
> src/hotspot/share/runtime/os.hpp line 693:
> 
>> 691:   static void print_hex_dump(outputStream* st, address start, address end, int unitsize) {
>> 692:     print_hex_dump(st, start, end, unitsize, /*bytes_per_line=*/16, /*logical_start=*/start);
>> 693:   }
> 
> This is a bit unclear. Could we do it like this instead:
> 
> // Print a hex dump from [start .. end). Output lines are prefixed with addresses.
> static void print_hex_dump(outputStream* st, address start, address end, int unitsize)
> 
> 
> // Print a hex dump from [base+start .. base+end). Output lines are prefixed with offset in relation to base.
> static void print_hex_dump(outputStream* st, address base, intx start, intx end, int unitsize)

But this is not what I want. I am calling with parameters like:

print_hex_dump(st, /*start=*/0x7ffff0000, end, unitsize, bytes_per_line,  /*logical_start=*/0x800000000);
So my buffer is at some random address, but I want the print out to pretend that it started at 0x800000000.

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PR: https://git.openjdk.java.net/jdk/pull/474