jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp@1d1603768966

7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair

     1 /*

     2  * Copyright (c) 2002, 2011, 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  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP

    28 #include "gc_implementation/parallelScavenge/cardTableExtension.hpp"

    29 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"

    30 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp"

    31 #include "gc_implementation/parallelScavenge/psScavenge.hpp"

    33 inline void PSScavenge::save_to_space_top_before_gc() {

    34   ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();

    35   _to_space_top_before_gc = heap->young_gen()->to_space()->top();

    36 }

    38 template <class T> inline bool PSScavenge::should_scavenge(T* p) {

    39   T heap_oop = oopDesc::load_heap_oop(p);

    40   if (oopDesc::is_null(heap_oop)) return false;

    41   oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    42   return PSScavenge::is_obj_in_young((HeapWord*)obj);

    43 }

    45 template <class T>

    46 inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) {

    47   if (should_scavenge(p)) {

    48     oop obj = oopDesc::load_decode_heap_oop_not_null(p);

    49     // Skip objects copied to to_space since the scavenge started.

    50     HeapWord* const addr = (HeapWord*)obj;

    51     return addr < to_space_top_before_gc() || addr >= to_space->end();

    52   }

    53   return false;

    54 }

    56 template <class T>

    57 inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) {

    58   if (check_to_space) {

    59     ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();

    60     return should_scavenge(p, heap->young_gen()->to_space());

    61   }

    62   return should_scavenge(p);

    63 }

    65 // Attempt to "claim" oop at p via CAS, push the new obj if successful

    66 // This version tests the oop* to make sure it is within the heap before

    67 // attempting marking.

    68 template <class T>

    69 inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm,

    70                                                    T*                  p) {

    71   assert(should_scavenge(p, true), "revisiting object?");

    73   oop o = oopDesc::load_decode_heap_oop_not_null(p);

    74   oop new_obj = o->is_forwarded()

    75         ? o->forwardee()

    76         : pm->copy_to_survivor_space(o);

    77   oopDesc::encode_store_heap_oop_not_null(p, new_obj);

    79   // We cannot mark without test, as some code passes us pointers

    80   // that are outside the heap.

    81   if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) &&

    82       Universe::heap()->is_in_reserved(p)) {

    83     if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) {

    84       card_table()->inline_write_ref_field_gc(p, new_obj);

    85     }

    86   }

    87 }

    89 class PSScavengeRootsClosure: public OopClosure {

    90  private:

    91   PSPromotionManager* _promotion_manager;

    93  protected:

    94   template <class T> void do_oop_work(T *p) {

    95     if (PSScavenge::should_scavenge(p)) {

    96       // We never card mark roots, maybe call a func without test?

    97       PSScavenge::copy_and_push_safe_barrier(_promotion_manager, p);

    98     }

    99   }

   100  public:

   101   PSScavengeRootsClosure(PSPromotionManager* pm) : _promotion_manager(pm) { }

   102   void do_oop(oop* p)       { PSScavengeRootsClosure::do_oop_work(p); }

   103   void do_oop(narrowOop* p) { PSScavengeRootsClosure::do_oop_work(p); }

   104 };

   106 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp@1d1603768966

src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp