< prev index next >

src/hotspot/share/gc/g1/g1ParScanThreadState.inline.hpp

Print this page
rev 49290 : [mq]: JDK-8199735.01.patch
   1 /*
   2  * Copyright (c) 2014, 2015, 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 #ifndef SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_INLINE_HPP
  26 #define SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_INLINE_HPP
  27 
  28 #include "gc/g1/g1ParScanThreadState.hpp"
  29 #include "gc/g1/g1RemSet.hpp"
  30 #include "oops/oop.inline.hpp"
  31 
  32 template <class T> void G1ParScanThreadState::do_oop_evac(T* p, HeapRegion* from) {
  33   assert(!oopDesc::is_null(oopDesc::load_decode_heap_oop(p)),
  34          "Reference should not be NULL here as such are never pushed to the task queue.");
  35   oop obj = oopDesc::load_decode_heap_oop_not_null(p);
  36 
  37   // Although we never intentionally push references outside of the collection
  38   // set, due to (benign) races in the claim mechanism during RSet scanning more
  39   // than one thread might claim the same card. So the same card may be
  40   // processed multiple times. So redo this check.
  41   const InCSetState in_cset_state = _g1h->in_cset_state(obj);
  42   if (in_cset_state.is_in_cset()) {
  43     markOop m = obj->mark();
  44     if (m->is_marked()) {
  45       obj = (oop) m->decode_pointer();
  46     } else {
  47       obj = copy_to_survivor_space(in_cset_state, obj, m);
  48     }
  49     oopDesc::encode_store_heap_oop(p, obj);
  50   } else if (in_cset_state.is_humongous()) {
  51     _g1h->set_humongous_is_live(obj);
  52   } else {
  53     assert(in_cset_state.is_default(),
  54          "In_cset_state must be NotInCSet here, but is " CSETSTATE_FORMAT, in_cset_state.value());
  55   }
  56 
  57   assert(obj != NULL, "Must be");
  58   if (!HeapRegion::is_in_same_region(p, obj)) {
  59     update_rs(from, p, obj);
  60   }
  61 }
  62 
  63 template <class T> inline void G1ParScanThreadState::push_on_queue(T* ref) {


   1 /*
   2  * Copyright (c) 2014, 2018, 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 #ifndef SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_INLINE_HPP
  26 #define SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_INLINE_HPP
  27 
  28 #include "gc/g1/g1ParScanThreadState.hpp"
  29 #include "gc/g1/g1RemSet.hpp"
  30 #include "oops/oop.inline.hpp"
  31 
  32 template <class T> void G1ParScanThreadState::do_oop_evac(T* p, HeapRegion* from) {
  33   assert(!oopDesc::is_null(oopDesc::load_decode_heap_oop(p)),
  34          "Reference should not be NULL here as such are never pushed to the task queue.");
  35   oop obj = oopDesc::load_decode_heap_oop_not_null(p);
  36 
  37   // Although we never intentionally push references outside of the collection
  38   // set, due to (benign) races in the claim mechanism during RSet scanning more
  39   // than one thread might claim the same card. So the same card may be
  40   // processed multiple times. So redo this check.
  41   const InCSetState in_cset_state = _g1h->in_cset_state(obj);
  42   if (in_cset_state.is_in_cset()) {
  43     markOop m = obj->mark_raw();
  44     if (m->is_marked()) {
  45       obj = (oop) m->decode_pointer();
  46     } else {
  47       obj = copy_to_survivor_space(in_cset_state, obj, m);
  48     }
  49     oopDesc::encode_store_heap_oop(p, obj);
  50   } else if (in_cset_state.is_humongous()) {
  51     _g1h->set_humongous_is_live(obj);
  52   } else {
  53     assert(in_cset_state.is_default(),
  54          "In_cset_state must be NotInCSet here, but is " CSETSTATE_FORMAT, in_cset_state.value());
  55   }
  56 
  57   assert(obj != NULL, "Must be");
  58   if (!HeapRegion::is_in_same_region(p, obj)) {
  59     update_rs(from, p, obj);
  60   }
  61 }
  62 
  63 template <class T> inline void G1ParScanThreadState::push_on_queue(T* ref) {


< prev index next >