RFR: 8294460: CodeSection::alignment checks for CodeBuffer::SECT_STUBS incorrectly

[Aleksey Shipilev]

On Tue, 27 Sep 2022 13:11:01 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Code added in `CodeSection::alignment` by [JDK-8287373](https://bugs.openjdk.org/browse/JDK-8287373) triggers `-Wint-in-bool-context` warning on GCC (currently globally ignored), due to apparent bug.
> 
> The bug seems innocuous now, as the branch is always taken, and the method checks for the rest of section types exhaustively. But, it would not go to `ShouldNotReachHere` if we pass e.g. `SECT_NONE` into the method.
> 
> Attention @bulasevich. 
> 
> Additional testing: 
>  - [ ] Linux x86_64 fastdebug tier1

Withdrawn, because testing shows there is a subtler issue in it. I added the failure example to the bug and reassigned to @bulasevich.

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PR: https://git.openjdk.org/jdk/pull/10450