RFR [XS] JDK-6590839: JNI Spec should point out Java objects created in JNI using AllocObject are not finalized

Daniel D. Daugherty daniel.daugherty at oracle.com
Fri Apr 25 19:56:50 UTC 2014


Thumbs up.

Dan


On 4/25/14 9:14 AM, David Simms wrote:
> JDK-6590839 <https://bugs.openjdk.java.net/browse/JDK-6590839>
>
> Minor addition to the JNI Specification 
> <http://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/jniTOC.html>: 
>
>
> Explain the lack of finalization AllocObject 
> <http://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/functions.html#AllocObject>(). 
> Web review here: http://cr.openjdk.java.net/~dsimms/jnispec/6590839/ 
> <http://cr.openjdk.java.net/%7Edsimms/jnispec/6590839/>
>
> *Old Text*
>     *New Text*
>
>
>      AllocObject
>
> |jobject AllocObject(JNIEnv *env, jclass clazz);|
>
> Allocates a new Java object without invoking any of the constructors 
> for the object. Returns a reference to the object.
>
> The clazz argument must not refer to an array class.
>
>
>
>
>      AllocObject
>
> |jobject AllocObject(JNIEnv *env, jclass clazz);|
>
> Allocates a new Java object without invoking any of the constructors 
> for the object. Returns a reference to the object.
>
> *Note:*The Java Language Specification, "Implementing Finalization" 
> (JLS §12.6.1 
> <http://docs.oracle.com/javase/specs/jls/se8/html/jls-12.html#jls-12.6.1>) 
> states: "An object o is not finalizable until its constructor has 
> invoked the constructor for Object on o and that invocation has 
> completed successfully". Since AllocObject() does not invoke a 
> constructor, objects created with this function are not eligible for 
> finalization.
>
> The clazz argument must not refer to an array class.
>
>



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