1 /*
   2  * Copyright (c) 1997, 2014, 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_OOPS_INSTANCEKLASS_INLINE_HPP
  26 #define SHARE_VM_OOPS_INSTANCEKLASS_INLINE_HPP
  27 
  28 #include "oops/instanceKlass.hpp"
  29 #include "classfile/javaClasses.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 
  32 #ifdef ASSERT
  33 template <class T> inline void InstanceKlass::assert_is_in(T *p) {
  34   T heap_oop = oopDesc::load_heap_oop(p);
  35   if (!oopDesc::is_null(heap_oop)) {
  36     oop o = oopDesc::decode_heap_oop_not_null(heap_oop);
  37     assert(Universe::heap()->is_in(o), "should be in heap");
  38   }
  39 }
  40 template <class T> inline void InstanceKlass::assert_is_in_closed_subset(T *p) {
  41   T heap_oop = oopDesc::load_heap_oop(p);
  42   if (!oopDesc::is_null(heap_oop)) {
  43     oop o = oopDesc::decode_heap_oop_not_null(heap_oop);
  44     assert(Universe::heap()->is_in_closed_subset(o),
  45            err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o));
  46   }
  47 }
  48 template <class T> inline void InstanceKlass::assert_is_in_reserved(T *p) {
  49   T heap_oop = oopDesc::load_heap_oop(p);
  50   if (!oopDesc::is_null(heap_oop)) {
  51     oop o = oopDesc::decode_heap_oop_not_null(heap_oop);
  52     assert(Universe::heap()->is_in_reserved(o), "should be in reserved");
  53   }
  54 }
  55 template <class T> inline void InstanceKlass::assert_nothing(T *p) {}
  56 
  57 #else
  58 template <class T> inline void InstanceKlass::assert_is_in(T *p) {}
  59 template <class T> inline void InstanceKlass::assert_is_in_closed_subset(T *p) {}
  60 template <class T> inline void InstanceKlass::assert_is_in_reserved(T *p) {}
  61 template <class T> inline void InstanceKlass::assert_nothing(T *p) {}
  62 #endif // ASSERT
  63 
  64 
  65 template<class OopType, class OopClosureType>
  66 void InstanceKlass::oop_iterate_and_dispatch_helper(oop obj, OopClosureType *closure, OopType *start, int count) {
  67   OopType *current = start;
  68   OopType* const end = current + count;
  69   while (current < end) {
  70     assert_is_in_closed_subset(current);
  71     OopClosureDispatcher::do_oop<OopClosureType, OopType>(closure, current);
  72     current++;
  73   }
  74 }
  75 
  76 template <class OopClosureType>
  77 int InstanceKlass::oop_iterate_and_dispatch(oop obj, OopClosureType *closure) {
  78   SpecializationStats::record_iterate_call_nv(SpecializationStats::ik);
  79 
  80   // Don't do metadata, let subclasses as only subclasses use this method.
  81 
  82   OopMapBlock* map           = start_of_nonstatic_oop_maps();
  83   OopMapBlock* const end_map = map + nonstatic_oop_map_count();
  84   if (UseCompressedOops) {
  85     while (map < end_map) {
  86       oop_iterate_and_dispatch_helper<narrowOop, OopClosureType>(obj, closure, (narrowOop*)obj->obj_field_addr<narrowOop>(map->offset()), map->count());
  87       ++map;
  88     }
  89   } else {
  90     while (map < end_map) {
  91       oop_iterate_and_dispatch_helper<oop, OopClosureType>(obj, closure, (oop*)obj->obj_field_addr<oop>(map->offset()), map->count());
  92       ++map;
  93     }
  94   }
  95 
  96   return size_helper();
  97 }
  98 
  99 #endif // SHARE_VM_OOPS_INSTANCEKLASS_INLINE_HPP
 100