RFR: 8340205: Native linker allows MemoryLayout consisting of only PaddingLayout [v16]

[Maurizio Cimadamore]

On Wed, 13 Nov 2024 15:21:24 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This PR prevents sequence layout with padding to be used with the Linker.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix failing test

src/java.base/share/classes/java/lang/foreign/Linker.java line 253:

> 251:  * <li>{@code L.byteAlignment()} is equal to the sequence layout's <em>natural alignment</em>
> 252:  *     , and</li>
> 253:  * <li>{@code S.elementLayout()} is a well-defined layout.</li>

Suggestion:

 * <li>{@code S.elementLayout()} is a well-formed layout.</li>

src/java.base/share/classes/java/lang/foreign/Linker.java line 261:

> 259:  * <li>{@code G.byteSize()} is a multiple of {@code G.byteAlignment()}</li>
> 260:  * <li>Each member layout in {@code G.memberLayouts()} is either a padding layout or a
> 261:  *     well-defined layout</li>

Suggestion:

 *     well-formed layout</li>

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/21041#discussion_r1842174338
PR Review Comment: https://git.openjdk.org/jdk/pull/21041#discussion_r1842175387