RFR: JDK-8276422 Add command-line option to disable finalization

[Kim Barrett]

On Thu, 18 Nov 2021 06:43:01 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Pretty much what it says. The new option controls a static member in InstanceKlass that's consulted to determine whether the finalization machinery is activated for instances when a class is loaded. A new native method is added so that this state can be queried from Java. This is used to control whether a finalizer thread is created and to disable the `System` and `Runtime::runFinalization` methods. Includes tests for the above.
>
> src/hotspot/share/prims/jvm.cpp line 694:
> 
>> 692: 
>> 693: JVM_ENTRY(jboolean, JVM_IsFinalizationEnabled(JNIEnv * env))
>> 694: return InstanceKlass::finalization_enabled() ? JNI_TRUE : JNI_FALSE;
> 
> missing indentation

I think this could just be `return InstanceKlass::finalization_enabled();`.  There is lots of code in this file and elsewhere that assumes C++ `bool` converts to `jboolean` appropriately.

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PR: https://git.openjdk.java.net/jdk/pull/6442