jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@4e0094bc41fa

6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
Summary: Clear the concurrent marking "in progress" flag while the FullGCCount_lock is held. This avoids a race that can cause back to back System.gc() calls, when ExplicitGCInvokesConcurrent is enabled, to fail to initiate a marking cycle causing the requesting thread to hang.
Reviewed-by: tonyp, ysr

     1 /*

     2  * Copyright (c) 2001, 2009, 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 // Inline functions for G1CollectedHeap

    27 inline HeapRegion*

    28 G1CollectedHeap::heap_region_containing(const void* addr) const {

    29   HeapRegion* hr = _hrs->addr_to_region(addr);

    30   // hr can be null if addr in perm_gen

    31   if (hr != NULL && hr->continuesHumongous()) {

    32     hr = hr->humongous_start_region();

    33   }

    34   return hr;

    35 }

    37 inline HeapRegion*

    38 G1CollectedHeap::heap_region_containing_raw(const void* addr) const {

    39   assert(_g1_reserved.contains(addr), "invariant");

    40   size_t index = pointer_delta(addr, _g1_reserved.start(), 1)

    41                                         >> HeapRegion::LogOfHRGrainBytes;

    43   HeapRegion* res = _hrs->at(index);

    44   assert(res == _hrs->addr_to_region(addr), "sanity");

    45   return res;

    46 }

    48 inline bool G1CollectedHeap::obj_in_cs(oop obj) {

    49   HeapRegion* r = _hrs->addr_to_region(obj);

    50   return r != NULL && r->in_collection_set();

    51 }

    53 inline HeapWord* G1CollectedHeap::attempt_allocation(size_t word_size,

    54                                               bool permit_collection_pause) {

    55   HeapWord* res = NULL;

    57   assert( SafepointSynchronize::is_at_safepoint() ||

    58           Heap_lock->owned_by_self(), "pre-condition of the call" );

    60   // All humongous allocation requests should go through the slow path in

    61   // attempt_allocation_slow().

    62   if (!isHumongous(word_size) && _cur_alloc_region != NULL) {

    63     // If this allocation causes a region to become non empty,

    64     // then we need to update our free_regions count.

    66     if (_cur_alloc_region->is_empty()) {

    67       res = _cur_alloc_region->allocate(word_size);

    68       if (res != NULL)

    69         _free_regions--;

    70     } else {

    71       res = _cur_alloc_region->allocate(word_size);

    72     }

    74     if (res != NULL) {

    75       if (!SafepointSynchronize::is_at_safepoint()) {

    76         assert( Heap_lock->owned_by_self(), "invariant" );

    77         Heap_lock->unlock();

    78       }

    79       return res;

    80     }

    81   }

    82   // attempt_allocation_slow will also unlock the heap lock when appropriate.

    83   return attempt_allocation_slow(word_size, permit_collection_pause);

    84 }

    86 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const {

    87   return _task_queues->queue(i);

    88 }

    90 inline  bool G1CollectedHeap::isMarkedPrev(oop obj) const {

    91   return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);

    92 }

    94 inline bool G1CollectedHeap::isMarkedNext(oop obj) const {

    95   return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj);

    96 }

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

src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@4e0094bc41fa

src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp