RFR: 8376125: Out of memory in the CDS archive error with lot of classes [v10]

[Ashutosh Mehra]

On Mon, 23 Feb 2026 16:53:20 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> src/hotspot/share/classfile/compactHashtable.hpp line 118:
>> 
>>> 116:   GrowableArray<Entry>** _buckets;
>>> 117:   CompactHashtableStats* _stats;
>>> 118:   u4* _compact_buckets;
>> 
>> I am not sure why are these changed from Array to C-array?
>
> The reason is Array<u4> looks like this:
> 
> 
> class Array<u4> {
>     int length;
>     u4 data[...];
> 
> 
> As the `Array` is 8-byte aligned, the address of `data` is not aligned. As a result, we cannot serialize it using `WriteClosure::do_ptr()`, which now requires 8-byte alignment.

@iklam thanks for clarifying this.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29494#discussion_r2842537627