RFR: JDK-8285712: LogMessageBuffer doesn't check vsnprintf return value [v3]

[Ioi Lam]

On Fri, 29 Apr 2022 07:52:34 GMT, Johan Sjölén <duke at openjdk.java.net> wrote:

>> os::vsnprintf can return a negative value on encoding error. A negative return value will cause wraparound when cast to size_t. This in turn causes LogMessageBuffer::grow() to attempt a large memory allocation. Instead of accepting this we bail on the logging.
>
> Johan Sjölén has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Print the assertion error message to the log

Marked as reviewed by iklam (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/8423