1 /*
   2  * Copyright (c) 2007, 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 // Trim our work_queue so its length is below max at return
  26 inline void Par_MarkRefsIntoAndScanClosure::trim_queue(uint max) {
  27   while (_work_queue->size() > max) {
  28     oop newOop;
  29     if (_work_queue->pop_local(newOop)) {
  30       assert(newOop->is_oop(), "Expected an oop");
  31       assert(_bit_map->isMarked((HeapWord*)newOop),
  32              "only grey objects on this stack");
  33       // iterate over the oops in this oop, marking and pushing
  34       // the ones in CMS heap (i.e. in _span).
  35       newOop->oop_iterate(&_par_pushAndMarkClosure);
  36     }
  37   }
  38 }
  39 
  40 #ifndef PRODUCT
  41 void KlassRememberingOopClosure::check_remember_klasses() const {
  42   assert(_should_remember_klasses == must_remember_klasses(),
  43     "Should remember klasses in this context.");
  44 }
  45 #endif
  46 
  47 void KlassRememberingOopClosure::remember_klass(Klass* k) {
  48   if (!_revisit_stack->push(oop(k))) {
  49     fatal("Revisit stack overflow in PushOrMarkClosure");
  50   }
  51   check_remember_klasses();
  52 }
  53 
  54 inline void PushOrMarkClosure::remember_mdo(DataLayout* v) {
  55   // TBD
  56 }
  57 
  58 
  59 void Par_KlassRememberingOopClosure::remember_klass(Klass* k) {
  60   if (!_revisit_stack->par_push(oop(k))) {
  61     fatal("Revisit stack overflow in Par_KlassRememberingOopClosure");
  62   }
  63   check_remember_klasses();
  64 }
  65 
  66 inline void Par_PushOrMarkClosure::remember_mdo(DataLayout* v) {
  67   // TBD
  68 }
  69 
  70 inline void PushOrMarkClosure::do_yield_check() {
  71   _parent->do_yield_check();
  72 }
  73 
  74 inline void Par_PushOrMarkClosure::do_yield_check() {
  75   _parent->do_yield_check();
  76 }