1 /*
   2  * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 # include "incls/_precompiled.incl"
  26 # include "incls/_instanceRefKlass.cpp.incl"



















  27 
  28 template <class T>
  29 static void specialized_oop_follow_contents(instanceRefKlass* ref, oop obj) {
  30   T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
  31   T heap_oop = oopDesc::load_heap_oop(referent_addr);
  32   debug_only(
  33     if(TraceReferenceGC && PrintGCDetails) {
  34       gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj);
  35     }
  36   )
  37   if (!oopDesc::is_null(heap_oop)) {
  38     oop referent = oopDesc::decode_heap_oop_not_null(heap_oop);
  39     if (!referent->is_gc_marked() &&
  40         MarkSweep::ref_processor()->
  41           discover_reference(obj, ref->reference_type())) {
  42       // reference already enqueued, referent will be traversed later
  43       ref->instanceKlass::oop_follow_contents(obj);
  44       debug_only(
  45         if(TraceReferenceGC && PrintGCDetails) {
  46           gclog_or_tty->print_cr("       Non NULL enqueued " INTPTR_FORMAT, obj);

   1 /*
   2  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/javaClasses.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "gc_implementation/shared/markSweep.inline.hpp"
  29 #include "gc_interface/collectedHeap.hpp"
  30 #include "gc_interface/collectedHeap.inline.hpp"
  31 #include "memory/genCollectedHeap.hpp"
  32 #include "memory/genOopClosures.inline.hpp"
  33 #include "oops/instanceRefKlass.hpp"
  34 #include "oops/oop.inline.hpp"
  35 #include "utilities/preserveException.hpp"
  36 #ifndef SERIALGC
  37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  38 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
  39 #include "gc_implementation/g1/g1RemSet.inline.hpp"
  40 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
  41 #include "gc_implementation/parNew/parOopClosures.inline.hpp"
  42 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
  43 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
  44 #include "oops/oop.pcgc.inline.hpp"
  45 #endif
  46 
  47 template <class T>
  48 static void specialized_oop_follow_contents(instanceRefKlass* ref, oop obj) {
  49   T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
  50   T heap_oop = oopDesc::load_heap_oop(referent_addr);
  51   debug_only(
  52     if(TraceReferenceGC && PrintGCDetails) {
  53       gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj);
  54     }
  55   )
  56   if (!oopDesc::is_null(heap_oop)) {
  57     oop referent = oopDesc::decode_heap_oop_not_null(heap_oop);
  58     if (!referent->is_gc_marked() &&
  59         MarkSweep::ref_processor()->
  60           discover_reference(obj, ref->reference_type())) {
  61       // reference already enqueued, referent will be traversed later
  62       ref->instanceKlass::oop_follow_contents(obj);
  63       debug_only(
  64         if(TraceReferenceGC && PrintGCDetails) {
  65           gclog_or_tty->print_cr("       Non NULL enqueued " INTPTR_FORMAT, obj);