jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/immutableSpace.cpp@0bfd3fb24150

6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
Summary: Ensure a full GC that clears SoftReferences before throwing an out-of-memory
Reviewed-by: ysr, jcoomes

     1 /*

     2  * Copyright 2001-2008 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  */

    25 # include "incls/_precompiled.incl"

    26 # include "incls/_immutableSpace.cpp.incl"

    28 void ImmutableSpace::initialize(MemRegion mr) {

    29   HeapWord* bottom = mr.start();

    30   HeapWord* end    = mr.end();

    32   assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end),

    33          "invalid space boundaries");

    35   _bottom = bottom;

    36   _end = end;

    37 }

    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 }

    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 }

    56 #ifndef PRODUCT

    58 void ImmutableSpace::print_short() const {

    59   tty->print(" space " SIZE_FORMAT "K, 100%% used", capacity_in_bytes() / K);

    60 }

    62 void ImmutableSpace::print() const {

    63   print_short();

    64   tty->print_cr(" [%#-6lx,%#-6lx)", bottom(), end());

    65 }

    67 #endif

    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 }

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

src/share/vm/gc_implementation/shared/immutableSpace.cpp@0bfd3fb24150

src/share/vm/gc_implementation/shared/immutableSpace.cpp