[crac] RFR: 8369566: CRaC: Record metrics during checkpoint [v4]

[Timofei Pushkin]

On Thu, 23 Oct 2025 08:28:18 GMT, Timofei Pushkin <tpushkin at openjdk.org> wrote:

>> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update after review
>
> src/java.base/share/native/libcrexec/hashtable.hpp line 128:
> 
>> 126:   const unsigned int hash = string_hash(key) % _capacity;
>> 127:   for (size_t i = hash; i < _capacity; i++) {
>> 128:     if (strcmp(key, _keys[i]) == 0) {
> 
> Since the number of keys can now be less than capacity, i.e. some stored keys may be uninitialized, we should check `_keys[i] != nullptr`

Actually, I don't remember whether `new[]` default-initializes to null or not. If not, we should do it ourselves.

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PR Review Comment: https://git.openjdk.org/crac/pull/269#discussion_r2454337341