On 9/29/17 2:38 PM, Peter Levart wrote:
I think the hotspot has an optimization and detects that finalize()
has no bytecodes and treats the object as not needing finalization.
http://hg.openjdk.java.net/jdk10/master/file/7d67bb6b0599/src/hotspot/share/classfile/classFileParser.cpp#l4250
// Check if this klass has an empty finalize method (i.e. one with
return bytecode only),
// in which case we don't have to register objects as finalizable
if (!_has_empty_finalizer) {
if (_has_finalizer ||
(super != NULL && super->has_finalizer())) {
ik->set_has_finalizer();
}
}
Mandy
