RFR: 8368781: PerfMemory - make issues more transparent [v6]

[Matthias Baesken]

On Mon, 20 Oct 2025 12:17:45 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Currently issues with perfMemory like problems with the secure tmp subdirectory creation are not very transparent in release JVMs.
>> 
>> There exists some warnings traces but they are behind develop flags like Verbose so only available in debug JVMs.
>> We could (in case of issues) store some information and write it later into hsinfo/hserr files ; or make the existing warnings available too in release JVMs.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove log_is_enabled

src/hotspot/share/runtime/perfMemory.cpp line 251:

> 249:                                    dest_file, JVM_MAXPATHLEN)) {
> 250:       FREE_C_HEAP_ARRAY(char, dest_file);
> 251:       log_debug(perf)("Invalid performance data file path name specified, "\

Btw is the ` '' `here really needed ? We had it before but most strings over multiple lines do not use it, from what I see ?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27602#discussion_r2445170092