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 assert(is_object_aligned(size), "alloc size breaks alignment: " SIZE_FORMAT, size); 36 37 HeapWord* obj = top(); 38 if (pointer_delta(end(), obj) >= size) { 39 make_regular_allocation(); 40 adjust_alloc_metadata(type, size); 41 42 HeapWord* new_top = obj + size; 43 set_top(new_top); 44 45 assert(is_object_aligned(new_top), "new top breaks alignment: " PTR_FORMAT, p2i(new_top)); 46 assert(is_object_aligned(obj), "obj is not aligned: " PTR_FORMAT, p2i(obj)); 47 48 return obj; 49 } else { 50 return NULL; 51 } 52 } 53 54 inline void ShenandoahHeapRegion::adjust_alloc_metadata(ShenandoahAllocRequest::Type type, size_t size) { 55 bool is_first_alloc = (top() == bottom()); 56 57 switch (type) { 58 case ShenandoahAllocRequest::_alloc_shared: 59 case ShenandoahAllocRequest::_alloc_tlab: 60 _seqnum_last_alloc_mutator = _alloc_seq_num.value++; 61 if (is_first_alloc) { 62 assert (_seqnum_first_alloc_mutator == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number); 63 _seqnum_first_alloc_mutator = _seqnum_last_alloc_mutator; 64 } 65 break; 66 case ShenandoahAllocRequest::_alloc_shared_gc: 67 case ShenandoahAllocRequest::_alloc_gclab: 68 _seqnum_last_alloc_gc = _alloc_seq_num.value++; 69 if (is_first_alloc) { 70 assert (_seqnum_first_alloc_gc == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number); 71 _seqnum_first_alloc_gc = _seqnum_last_alloc_gc; 72 } 73 break; 74 default: 75 ShouldNotReachHere(); 76 } 77 78 switch (type) { 79 case ShenandoahAllocRequest::_alloc_shared: 80 case ShenandoahAllocRequest::_alloc_shared_gc: 81 _shared_allocs += size; 82 break; 83 case ShenandoahAllocRequest::_alloc_tlab: 84 _tlab_allocs += size; 85 break; 86 case ShenandoahAllocRequest::_alloc_gclab: 87 _gclab_allocs += size; 88 break; 89 default: 90 ShouldNotReachHere(); 91 } 92 } 93 94 inline void ShenandoahHeapRegion::increase_live_data_alloc_words(size_t s) { 95 internal_increase_live_data(s); 96 } 97 98 inline void ShenandoahHeapRegion::increase_live_data_gc_words(size_t s) { 99 internal_increase_live_data(s); 100 if (ShenandoahPacing) { 101 _heap->pacer()->report_mark(s); 102 } 103 } 104 105 inline void ShenandoahHeapRegion::internal_increase_live_data(size_t s) { 106 size_t new_live_data = Atomic::add(s, &_live_data); 107 #ifdef ASSERT 108 size_t live_bytes = new_live_data * HeapWordSize; 109 size_t used_bytes = used(); 110 assert(live_bytes <= used_bytes, 111 "can't have more live data than used: " SIZE_FORMAT ", " SIZE_FORMAT, live_bytes, used_bytes); 112 #endif 113 } 114 115 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP