Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@bb847e31b836 (annotated)
src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp
Tue, 17 Aug 2010 14:40:00 -0400
- author
- tonyp
- date
- Tue, 17 Aug 2010 14:40:00 -0400
- changeset 2073
- bb847e31b836
- parent 2064
- 5f429ee79634
- child 2314
- f95d63e2154a
- permissions
- -rw-r--r--
6974928: G1: sometimes humongous objects are allocated in young regions
Summary: as the title says, sometimes we are allocating humongous objects in young regions and we shouldn't.
Reviewed-by: ysr, johnc
| ysr@777 | 1 | /* |
| trims@1907 | 2 | * Copyright (c) 2001, 2009, Oracle and/or its affiliates. All rights reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| ysr@777 | 25 | // Inline functions for G1CollectedHeap |
| ysr@777 | 26 | |
| ysr@777 | 27 | inline HeapRegion* |
| ysr@777 | 28 | G1CollectedHeap::heap_region_containing(const void* addr) const { |
| ysr@777 | 29 | HeapRegion* hr = _hrs->addr_to_region(addr); |
| ysr@777 | 30 | // hr can be null if addr in perm_gen |
| ysr@777 | 31 | if (hr != NULL && hr->continuesHumongous()) { |
| ysr@777 | 32 | hr = hr->humongous_start_region(); |
| ysr@777 | 33 | } |
| ysr@777 | 34 | return hr; |
| ysr@777 | 35 | } |
| ysr@777 | 36 | |
| ysr@777 | 37 | inline HeapRegion* |
| ysr@777 | 38 | G1CollectedHeap::heap_region_containing_raw(const void* addr) const { |
| tonyp@961 | 39 | assert(_g1_reserved.contains(addr), "invariant"); |
| johnc@1187 | 40 | size_t index = pointer_delta(addr, _g1_reserved.start(), 1) |
| johnc@1187 | 41 | >> HeapRegion::LogOfHRGrainBytes; |
| johnc@1187 | 42 | |
| tonyp@961 | 43 | HeapRegion* res = _hrs->at(index); |
| tonyp@961 | 44 | assert(res == _hrs->addr_to_region(addr), "sanity"); |
| ysr@777 | 45 | return res; |
| ysr@777 | 46 | } |
| ysr@777 | 47 | |
| ysr@777 | 48 | inline bool G1CollectedHeap::obj_in_cs(oop obj) { |
| ysr@777 | 49 | HeapRegion* r = _hrs->addr_to_region(obj); |
| ysr@777 | 50 | return r != NULL && r->in_collection_set(); |
| ysr@777 | 51 | } |
| ysr@777 | 52 | |
| ysr@777 | 53 | inline HeapWord* G1CollectedHeap::attempt_allocation(size_t word_size, |
| ysr@777 | 54 | bool permit_collection_pause) { |
| ysr@777 | 55 | HeapWord* res = NULL; |
| ysr@777 | 56 | |
| ysr@777 | 57 | assert( SafepointSynchronize::is_at_safepoint() || |
| ysr@777 | 58 | Heap_lock->owned_by_self(), "pre-condition of the call" ); |
| ysr@777 | 59 | |
| tonyp@2073 | 60 | // All humongous allocation requests should go through the slow path in |
| tonyp@2073 | 61 | // attempt_allocation_slow(). |
| tonyp@2073 | 62 | if (!isHumongous(word_size) && _cur_alloc_region != NULL) { |
| ysr@777 | 63 | // If this allocation causes a region to become non empty, |
| ysr@777 | 64 | // then we need to update our free_regions count. |
| ysr@777 | 65 | |
| ysr@777 | 66 | if (_cur_alloc_region->is_empty()) { |
| ysr@777 | 67 | res = _cur_alloc_region->allocate(word_size); |
| ysr@777 | 68 | if (res != NULL) |
| ysr@777 | 69 | _free_regions--; |
| ysr@777 | 70 | } else { |
| ysr@777 | 71 | res = _cur_alloc_region->allocate(word_size); |
| ysr@777 | 72 | } |
| tonyp@2073 | 73 | |
| tonyp@2073 | 74 | if (res != NULL) { |
| tonyp@2073 | 75 | if (!SafepointSynchronize::is_at_safepoint()) { |
| tonyp@2073 | 76 | assert( Heap_lock->owned_by_self(), "invariant" ); |
| tonyp@2073 | 77 | Heap_lock->unlock(); |
| tonyp@2073 | 78 | } |
| tonyp@2073 | 79 | return res; |
| ysr@777 | 80 | } |
| ysr@777 | 81 | } |
| ysr@777 | 82 | // attempt_allocation_slow will also unlock the heap lock when appropriate. |
| ysr@777 | 83 | return attempt_allocation_slow(word_size, permit_collection_pause); |
| ysr@777 | 84 | } |
| ysr@777 | 85 | |
| jcoomes@2064 | 86 | inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const { |
| ysr@777 | 87 | return _task_queues->queue(i); |
| ysr@777 | 88 | } |
| ysr@777 | 89 | |
| ysr@777 | 90 | inline bool G1CollectedHeap::isMarkedPrev(oop obj) const { |
| ysr@777 | 91 | return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj); |
| ysr@777 | 92 | } |
| ysr@777 | 93 | |
| ysr@777 | 94 | inline bool G1CollectedHeap::isMarkedNext(oop obj) const { |
| ysr@777 | 95 | return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj); |
| ysr@777 | 96 | } |
