RFR: 8343767: Enumerate StubGen blobs, stubs and entries and generate code from declarations [v5]

[Andrew Dinn]

On Fri, 22 Nov 2024 04:07:25 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Andrew Dinn has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 55 additional commits since the last revision:
>> 
>>  - Merge branch 'master' into iterate_stubs
>>  - fix element sizes in s390 copy routines
>>  - fix stub is and align flags for s390
>>  - fix comments and remove unused stubid on riscv
>>  - locate super lookup stubs in same blob for all arches
>>  - do verification under ifdef ASSERT
>>  - fix yet more problems with s390 stubs
>>  - better error notification
>>  - fix more problems with s390 stubs
>>  - Verify stubs are generated in correct blob
>>  - ... and 45 more: https://git.openjdk.org/jdk/compare/28719dc5...e21268c4
>
> I submitted it for testing and it seems the build is mostly broken on x86 when `UseAVX=3` is set. I even tried to manually build the patch on an AVX512-capable host and it reliably fails early during startup:
> 
> Error occurred during initialization of boot layer
> java.lang.module.FindException: Error reading module: /scratch/vlivanov/jdk/build/linux-x64-fastdebug/jdk/modules/java.base
> Caused by: java.lang.module.InvalidModuleDescriptorException: Bad constant pool entry: 90

@iwanowww I found and patched a very obvious scaling error with the avx3 array copy routines. I could not see anything else obvious. Could you rerun tests and see if this at least gets us through the build process on x86? Thanks.

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PR Comment: https://git.openjdk.org/jdk/pull/21957#issuecomment-2500154351