RFR: 8325471: CHeapBitMap(MEMFLAGS flags) constructor misleading use of super-constructor

[Axel Boldt-Christmas]

On Thu, 8 Feb 2024 09:00:35 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> The `explicit CHeapBitMap(MEMFLAGS flags)` calls the `GrowableBitMap(bm_word_t* map, idx_t size_in_bits)` super-constructor with `GrowableBitMap(0, false)`. This works because `0` gets converted to `nullptr` and `false` gets converted to `0`. However this seems to have be a miss in the most recent refactoring and is misleading.
> 
> `explicit CHeapBitMap(MEMFLAGS flags)` should use `GrowableBitMap()` directly which creates an empty (uninitialised) bitmap.

Thanks for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/17768#issuecomment-1935553228