1 /*
   2  * Copyright (c) 2001, 2008, 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/_immutableSpace.cpp.incl"
  27 
  28 void ImmutableSpace::initialize(MemRegion mr) {
  29   HeapWord* bottom = mr.start();
  30   HeapWord* end    = mr.end();
  31 
  32   assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end),
  33          "invalid space boundaries");
  34 
  35   _bottom = bottom;
  36   _end = end;
  37 }
  38 
  39 void ImmutableSpace::oop_iterate(OopClosure* cl) {
  40   HeapWord* obj_addr = bottom();
  41   HeapWord* t = end();
  42   // Could call objects iterate, but this is easier.
  43   while (obj_addr < t) {
  44     obj_addr += oop(obj_addr)->oop_iterate(cl);
  45   }
  46 }
  47 
  48 void ImmutableSpace::object_iterate(ObjectClosure* cl) {
  49   HeapWord* p = bottom();
  50   while (p < end()) {
  51     cl->do_object(oop(p));
  52     p += oop(p)->size();
  53   }
  54 }
  55 
  56 #ifndef PRODUCT
  57 
  58 void ImmutableSpace::print_short() const {
  59   tty->print(" space " SIZE_FORMAT "K, 100%% used", capacity_in_bytes() / K);
  60 }
  61 
  62 void ImmutableSpace::print() const {
  63   print_short();
  64   tty->print_cr(" [%#-6lx,%#-6lx)", bottom(), end());
  65 }
  66 
  67 #endif
  68 
  69 void ImmutableSpace::verify(bool allow_dirty) {
  70   HeapWord* p = bottom();
  71   HeapWord* t = end();
  72   HeapWord* prev_p = NULL;
  73   while (p < t) {
  74     oop(p)->verify();
  75     prev_p = p;
  76     p += oop(p)->size();
  77   }
  78   guarantee(p == end(), "end of last object must match end of space");
  79 }