jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@5f429ee79634 (annotated)

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@5f429ee79634 (annotated)

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp

Mon, 09 Aug 2010 05:41:05 -0700

author: jcoomes
date: Mon, 09 Aug 2010 05:41:05 -0700
changeset 2064: 5f429ee79634
parent 2063: a03ae377b2e8
child 2216: c32059ef4dc0
permissions: -rw-r--r--

6966222: G1: simplify TaskQueue overflow handling
Reviewed-by: tonyp, ysr

 /*
  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 inline size_t G1RemSet::n_workers() {
   if (_g1->workers() != NULL) {
     return _g1->workers()->total_workers();
   } else {
     return 1;
   }
 }
 template <class T> inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, T* p) {
   par_write_ref_nv(from, p, 0);
 }
 inline bool HRInto_G1RemSet::self_forwarded(oop obj) {
   bool result =  (obj->is_forwarded() && (obj->forwardee()== obj));
   return result;
 }
 template <class T> inline void HRInto_G1RemSet::par_write_ref_nv(HeapRegion* from, T* p, int tid) {
   oop obj = oopDesc::load_decode_heap_oop(p);
 #ifdef ASSERT
   // can't do because of races
   // assert(obj == NULL || obj->is_oop(), "expected an oop");
   // Do the safe subset of is_oop
   if (obj != NULL) {
 #ifdef CHECK_UNHANDLED_OOPS
     oopDesc* o = obj.obj();
 #else
     oopDesc* o = obj;
 #endif // CHECK_UNHANDLED_OOPS
     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
   }
 #endif // ASSERT
   assert(from == NULL || from->is_in_reserved(p), "p is not in from");
   HeapRegion* to = _g1->heap_region_containing(obj);
   // The test below could be optimized by applying a bit op to to and from.
   if (to != NULL && from != NULL && from != to) {
     // The _traversal_in_progress flag is true during the collection pause,
     // false during the evacuation failure handling. This should avoid a
     // potential loop if we were to add the card containing 'p' to the DCQS
     // that's used to regenerate the remembered sets for the collection set,
     // in the event of an evacuation failure, here. The UpdateRSImmediate
     // closure will eventally call this routine.
     if (_traversal_in_progress &&
         to->in_collection_set() && !self_forwarded(obj)) {
       assert(_cset_rs_update_cl[tid] != NULL, "should have been set already");
       _cset_rs_update_cl[tid]->do_oop(p);
       // Deferred updates to the CSet are either discarded (in the normal case),
       // or processed (if an evacuation failure occurs) at the end
       // of the collection.
       // See HRInto_G1RemSet::cleanup_after_oops_into_collection_set_do().
     } else {
 #if G1_REM_SET_LOGGING
       gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS"
                              " for region [" PTR_FORMAT ", " PTR_FORMAT ")",
                              p, obj,
                              to->bottom(), to->end());
 #endif
       assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
       to->rem_set()->add_reference(p, tid);
     }
   }
 }
 template <class T> inline void UpdateRSOopClosure::do_oop_work(T* p) {
   assert(_from != NULL, "from region must be non-NULL");
   _rs->par_write_ref(_from, p, _worker_i);
 }
 template <class T> inline void UpdateRSetImmediate::do_oop_work(T* p) {
   assert(_from->is_in_reserved(p), "paranoia");
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) {
     _g1_rem_set->par_write_ref(_from, p, 0);
   }
 }

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src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@5f429ee79634 (annotated)

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp