question: @ Uninterruptible ( "Encoding arguments on stack that won't be seen by GC" ) @ Inline private int uninterruptiblePushJNIRef ( Address ref , boolean isRef ) { if ( isRef && ref . isZero ( ) ) { return 0 ; } else { if ( VM . VerifyAssertions ) checkPush ( isRef ? Magic . addressAsObject ( ref ) : null , false ) ; JNIRefsTop += BYTES_IN_ADDRESS ; JNIRefs . set ( JNIRefsTop > > LOG_BYTES_IN_ADDRESS , ref ) ; return JNIRefsTop ; } }
target:  Push a JNI ref, used on entry to JNI NB only used for Intel