1 /* 2 * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP 25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP 26 27 #include "gc/shenandoah/shenandoahHeap.inline.hpp" 28 #include "gc/shenandoah/shenandoahHeapRegion.hpp" 29 #include "gc/shenandoah/shenandoahPacer.inline.hpp" 30 #include "runtime/atomic.hpp" 31 32 HeapWord* ShenandoahHeapRegion::allocate(size_t size, ShenandoahAllocRequest::Type type) { 33 _heap->assert_heaplock_or_safepoint(); 34 35 HeapWord* obj = top(); 36 if (pointer_delta(end(), obj) >= size) { 37 make_regular_allocation(); 38 adjust_alloc_metadata(type, size); 39 40 HeapWord* new_top = obj + size; 41 set_top(new_top); 42 assert(is_aligned(obj) && is_aligned(new_top), "checking alignment"); 43 44 return obj; 45 } else { 46 return NULL; 47 } 48 } 49 50 inline void ShenandoahHeapRegion::adjust_alloc_metadata(ShenandoahAllocRequest::Type type, size_t size) { 51 bool is_first_alloc = (top() == bottom()); 52 53 switch (type) { 54 case ShenandoahAllocRequest::_alloc_shared: 55 case ShenandoahAllocRequest::_alloc_tlab: 56 _seqnum_last_alloc_mutator = _alloc_seq_num.value++; 57 if (is_first_alloc) { 58 assert (_seqnum_first_alloc_mutator == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number); 59 _seqnum_first_alloc_mutator = _seqnum_last_alloc_mutator; 60 } 61 break; 62 case ShenandoahAllocRequest::_alloc_shared_gc: 63 case ShenandoahAllocRequest::_alloc_gclab: 64 _seqnum_last_alloc_gc = _alloc_seq_num.value++; 65 if (is_first_alloc) { 66 assert (_seqnum_first_alloc_gc == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number); 67 _seqnum_first_alloc_gc = _seqnum_last_alloc_gc; 68 } 69 break; 70 default: 71 ShouldNotReachHere(); 72 } 73 74 switch (type) { 75 case ShenandoahAllocRequest::_alloc_shared: 76 case ShenandoahAllocRequest::_alloc_shared_gc: 77 _shared_allocs += size; 78 break; 79 case ShenandoahAllocRequest::_alloc_tlab: 80 _tlab_allocs += size; 81 break; 82 case ShenandoahAllocRequest::_alloc_gclab: 83 _gclab_allocs += size; 84 break; 85 default: 86 ShouldNotReachHere(); 87 } 88 } 89 90 inline void ShenandoahHeapRegion::increase_live_data_alloc_words(size_t s) { 91 internal_increase_live_data(s); 92 } 93 94 inline void ShenandoahHeapRegion::increase_live_data_gc_words(size_t s) { 95 internal_increase_live_data(s); 96 if (ShenandoahPacing) { 97 _pacer->report_mark(s); 98 } 99 } 100 101 inline void ShenandoahHeapRegion::internal_increase_live_data(size_t s) { 102 size_t new_live_data = Atomic::add(s, &_live_data); 103 #ifdef ASSERT 104 size_t live_bytes = new_live_data * HeapWordSize; 105 size_t used_bytes = used(); 106 assert(live_bytes <= used_bytes, 107 "can't have more live data than used: " SIZE_FORMAT ", " SIZE_FORMAT, live_bytes, used_bytes); 108 #endif 109 } 110 111 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP