RFR: 8260193: Remove JVM_GetInterfaceVersion() and JVM_DTraceXXX [v2]

[Gerard Ziemski]

On Mon, 1 Feb 2021 20:54:42 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> src/java.base/share/native/libjava/check_version.c line 33:
>> 
>>> 31: DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
>>> 32: {
>>> 33:     return JNI_VERSION_1_2;
>> 
>> This leaves an entire file with one trivial function implementation. Can we remove the file and implement  `DEF_JNI_OnLoad()` in `jni_util.h` (or some other existing suitable file) ?
>
> I am not sure if jni_utils.c is the right file (it defines the `JNU_XXX` functions that are used by other shared libraries).
> 
> There are other .c files that have trivial `DEF_JNI_OnLoad` functions (e.g., java.base/share/native/libnio/nio_util.c).
> 
> @AlanBateman do you have any suggestions?

I'm fine with the way it is, just thought we might want to consider cleaning up a bit more, since it's a cleanup task itself.

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PR: https://git.openjdk.java.net/jdk/pull/2338