jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/heapRegionSets.cpp@4f93f0d00802

7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc

     1 /*

     2  * Copyright (c) 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 #include "precompiled.hpp"

    26 #include "gc_implementation/g1/heapRegionRemSet.hpp"

    27 #include "gc_implementation/g1/heapRegionSets.hpp"

    29 //////////////////// FreeRegionList ////////////////////

    31 const char* FreeRegionList::verify_region_extra(HeapRegion* hr) {

    32   if (hr->is_young()) {

    33     return "the region should not be young";

    34   }

    35   // The superclass will check that the region is empty and

    36   // not-humongous.

    37   return HeapRegionLinkedList::verify_region_extra(hr);

    38 }

    40 //////////////////// MasterFreeRegionList ////////////////////

    42 const char* MasterFreeRegionList::verify_region_extra(HeapRegion* hr) {

    43   // We should reset the RSet for parallel iteration before we add it

    44   // to the master free list so that it is ready when the region is

    45   // re-allocated.

    46   if (!hr->rem_set()->verify_ready_for_par_iteration()) {

    47     return "the region's RSet should be ready for parallel iteration";

    48   }

    49   return FreeRegionList::verify_region_extra(hr);

    50 }

    52 bool MasterFreeRegionList::check_mt_safety() {

    53   // Master Free List MT safety protocol:

    54   // (a) If we're at a safepoint, operations on the master free list

    55   // should be invoked by either the VM thread (which will serialize

    56   // them) or by the GC workers while holding the

    57   // FreeList_lock.

    58   // (b) If we're not at a safepoint, operations on the master free

    59   // list should be invoked while holding the Heap_lock.

    61   guarantee((SafepointSynchronize::is_at_safepoint() &&

    62                (Thread::current()->is_VM_thread() ||

    63                                             FreeList_lock->owned_by_self())) ||

    64             (!SafepointSynchronize::is_at_safepoint() &&

    65                                                 Heap_lock->owned_by_self()),

    66             hrs_ext_msg(this, "master free list MT safety protocol"));

    68   return FreeRegionList::check_mt_safety();

    69 }

    71 //////////////////// SecondaryFreeRegionList ////////////////////

    73 bool SecondaryFreeRegionList::check_mt_safety() {

    74   // Secondary Free List MT safety protocol:

    75   // Operations on the secondary free list should always be invoked

    76   // while holding the SecondaryFreeList_lock.

    78   guarantee(SecondaryFreeList_lock->owned_by_self(),

    79             hrs_ext_msg(this, "secondary free list MT safety protocol"));

    81   return FreeRegionList::check_mt_safety();

    82 }

    84 //////////////////// HumongousRegionSet ////////////////////

    86 const char* HumongousRegionSet::verify_region_extra(HeapRegion* hr) {

    87   if (hr->is_young()) {

    88     return "the region should not be young";

    89   }

    90   // The superclass will check that the region is not empty and

    91   // humongous.

    92   return HeapRegionSet::verify_region_extra(hr);

    93 }

    95 //////////////////// MasterHumongousRegionSet ////////////////////

    97 bool MasterHumongousRegionSet::check_mt_safety() {

    98   // Master Humongous Set MT safety protocol:

    99   // (a) If we're at a safepoint, operations on the master humongous

   100   // set should be invoked by either the VM thread (which will

   101   // serialize them) or by the GC workers while holding the

   102   // OldSets_lock.

   103   // (b) If we're not at a safepoint, operations on the master

   104   // humongous set should be invoked while holding the Heap_lock.

   106   guarantee((SafepointSynchronize::is_at_safepoint() &&

   107                (Thread::current()->is_VM_thread() ||

   108                                              OldSets_lock->owned_by_self())) ||

   109             (!SafepointSynchronize::is_at_safepoint() &&

   110                                                  Heap_lock->owned_by_self()),

   111             hrs_ext_msg(this, "master humongous set MT safety protocol"));

   112   return HumongousRegionSet::check_mt_safety();

   113 }

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

src/share/vm/gc_implementation/g1/heapRegionSets.cpp@4f93f0d00802

src/share/vm/gc_implementation/g1/heapRegionSets.cpp