RFR: 8337662: Improve os::print_hex_dump for printing Instructions sections [v5]

[Matthias Baesken]

On Tue, 6 Aug 2024 15:33:44 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Currently we use os::print_hex_dump for printing Instruction sections in the hserr file. The function could be slightly improved, .e.g. by showing directly the pc .
>> The instructions section would for example look like this, with a small helper '=>' pointing to the pc. Makes the output more readable.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add gtest

I removed the extra whitespace in os.cpp .

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PR Comment: https://git.openjdk.org/jdk/pull/20419#issuecomment-2296569064