RFR: 8292818: replace 96-bit representation for field metadata with variable-sized streams [v4]

[Doug Simon]

On Tue, 14 Mar 2023 13:37:23 GMT, Frederic Parain <fparain at openjdk.org> wrote:

>> src/hotspot/share/jvmci/jvmciEnv.hpp line 149:
>> 
>>> 147: };
>>> 148: 
>>> 149: extern JNIEXPORT jobjectArray c2v_getDeclaredFieldsInfo(JNIEnv* env, jobject, jobject, jlong);
>> 
>> What's the purpose of this declaration? I don't think you need it or the `friend` declaration below since `new_FieldInfo(FieldInfo* fieldinfo, JVMCI_TRAPS)` is public.
>
> Without this declaration, builds fail on Windows with this error:
> `error C2375: 'c2v_getDeclaredFieldsInfo': redefinition; different linkage`

Strange - thats not needed for other `JVMCIEnv` methods called from `jvmciCompilerToVM.cpp`. There must be some way to avoid this.

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PR: https://git.openjdk.org/jdk/pull/12855