RFR: 8081833: Clean up JVMFlag getter/setter code [v2]

[Gerard Ziemski]

On Thu, 17 Sep 2020 01:01:54 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> src/hotspot/share/prims/whitebox.cpp line 1423:
>> 
>>> 1421:   {
>>> 1422:     ThreadInVMfromNative ttvfn(thread); // back to VM
>>> 1423:     needFree = SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult);
>> 
>> I wonder if these whitebox methods could be rewritten as macros, like the jni.cpp methods, like: DEFINE_GETFIELD, etc,
>> in a future RFE.
>
> I am not quite sure. On the one hand I like code reduction, but on the other hand macro-generated code will be
> difficult to debug.

I was unsure here whether to suggest the same change, and decided against. It's a fine line...

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PR: https://git.openjdk.java.net/jdk/pull/163