There is a possible overflow when using `mlib_alloc()`. For example, `mlib_alloc(sizeof(mlib_s32) * (m * n))` may overflow if m and n are greater than 46430, since this would be greater than the max value for a signed 32 bit integer. I have added `SAFE_TO_ADD` and `SAFE_TO_MULT` in an attempt to amend this issue. CI testing shows all green.
------------- Commit messages: - Initial commit Changes: https://git.openjdk.org/jdk/pull/28560/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28560&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8371647 Stats: 42 lines in 5 files changed: 42 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/28560.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28560/head:pull/28560 PR: https://git.openjdk.org/jdk/pull/28560
