jmx-dev RFR: 8350939: Revisit Windows PDH buffer size calculation for OperatingSystemMXBean

[Serguei Spitsyn]

On Mon, 3 Mar 2025 12:22:01 GMT, Kevin Walls <kevinw at openjdk.org> wrote:

> Following on from JDK-8350820, which backed out the _snprintf to snprintf change (JDK-8336289) in OperatingSystemImpl.c on Windows, because the counter names were being truncated (so CPU monitoring was not possible).
> 
> This change moves to snprintf again, but the counter names are not truncated.
> 
> snprintf must need the null terminator to fit inside the buffer length given.  It does not, and snprintf truncates (and always add the null terminator).

Looks good.

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Marked as reviewed by sspitsyn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23861#pullrequestreview-2662733039