RFR: 8254723: add diagnostic command to write Linux perf map file [v2]

[Nick Gasson]

On Thu, 22 Oct 2020 02:06:25 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> Nick Gasson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update for review comments
>
> src/hotspot/share/code/codeCache.cpp line 1571:
> 
>> 1569:   if (!fs.is_open()) {
>> 1570:     log_warning(codecache)("Failed to create %s for perf map", fname);
>> 1571:     st->print_cr("Failed to create %s", fname);
> 
> `st->print_cr()` is still needed? and also I've intended to replace all `print_cr()` to UL (L1587)

It's gone now.

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PR: https://git.openjdk.java.net/jdk/pull/760