jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@df6caf649ff7 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@df6caf649ff7 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp

Tue, 14 Jul 2009 15:40:39 -0700

author: ysr
date: Tue, 14 Jul 2009 15:40:39 -0700
changeset 1280: df6caf649ff7
parent 777: 37f87013dfd8
child 1696: 0414c1049f15
permissions: -rw-r--r--

6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp

 /*
  * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 /*
  * This really ought to be an inline function, but apparently the C++
  * compiler sometimes sees fit to ignore inline declarations.  Sigh.
  */
 // This must a ifdef'ed because the counting it controls is in a
 // perf-critical inner loop.
 #define FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT 0
 template <class T> inline void FilterIntoCSClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) &&
       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {
     _oc->do_oop(p);
 #if FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT
     _dcto_cl->incr_count();
 #endif
   }
 }
 #define FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT 0
 template <class T> inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);
     if (obj_hw < _r_bottom || obj_hw >= _r_end) {
       _oc->do_oop(p);
 #if FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT
       _out_of_region++;
 #endif
     }
   }
 }
 template <class T> inline void FilterInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) &&
       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop)))
     _oc->do_oop(p);
 }
 template <class T> inline void FilterAndMarkInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     HeapRegion* hr = _g1->heap_region_containing((HeapWord*) obj);
     if (hr != NULL) {
       if (hr->in_collection_set())
         _oc->do_oop(p);
       else if (!hr->is_young())
         _cm->grayRoot(obj);
     }
   }
 }
 // This closure is applied to the fields of the objects that have just been copied.
 template <class T> inline void G1ParScanClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if (_g1->in_cset_fast_test(obj)) {
       // We're not going to even bother checking whether the object is
       // already forwarded or not, as this usually causes an immediate
       // stall. We'll try to prefetch the object (for write, given that
       // we might need to install the forwarding reference) and we'll
       // get back to it when pop it from the queue
       Prefetch::write(obj->mark_addr(), 0);
       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
       // slightly paranoid test; I'm trying to catch potential
       // problems before we go into push_on_queue to know where the
       // problem is coming from
       assert(obj == oopDesc::load_decode_heap_oop(p),
              "p should still be pointing to obj");
       _par_scan_state->push_on_queue(p);
     } else {
       _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num());
     }
   }
 }

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src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@df6caf649ff7 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp