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

[Aleksey Shipilev]

On Thu, 18 Nov 2021 01:34:36 GMT, Stuart Marks <smarks 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.

>From the brief look, it is OK. Minor nits.

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;

Suggestion:

  return InstanceKlass::finalization_enabled() ? JNI_TRUE : JNI_FALSE;

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