jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp@82db0859acbe

6642862: Code cache allocation fails with large pages after 6588638
Reviewed-by: apetrusenko

     1 /*

     2  * Copyright 2002-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    26 inline void PSScavenge::save_to_space_top_before_gc() {

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

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

    29 }

    31 inline bool PSScavenge::should_scavenge(oop p) {

    32   return p == NULL ? false : PSScavenge::is_obj_in_young((HeapWord*) p);

    33 }

    35 inline bool PSScavenge::should_scavenge(oop p, MutableSpace* to_space) {

    36   if (should_scavenge(p)) {

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

    38     HeapWord* const addr = (HeapWord*) p;

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

    40   }

    41   return false;

    42 }

    44 inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) {

    45   if (check_to_space) {

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

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

    48   }

    49   return should_scavenge(p);

    50 }

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

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

    54 // attempting marking.

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

    56                                                    oop*                p) {

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

    59   oop o = *p;

    60   if (o->is_forwarded()) {

    61     *p = o->forwardee();

    62   } else {

    63     *p = pm->copy_to_survivor_space(o, pm->depth_first());

    64   }

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

    67   // that are outside the heap.

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

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

    70     o = *p;

    71     if (PSScavenge::is_obj_in_young((HeapWord*) o)) {

    72       card_table()->inline_write_ref_field_gc(p, o);

    73     }

    74   }

    75 }

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