1 /* 2 * Copyright (c) 2018, 2019, 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_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP 25 #define SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP 26 27 #include "gc/shared/plab.hpp" 28 #include "gc/shenandoah/shenandoahBarrierSet.hpp" 29 #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp" 30 #include "runtime/thread.hpp" 31 #include "utilities/debug.hpp" 32 #include "utilities/sizes.hpp" 33 34 class ShenandoahThreadLocalData { 35 public: 36 static const uint INVALID_WORKER_ID = uint(-1); 37 38 private: 39 char _gc_state; 40 char _oom_during_evac; 41 ShenandoahSATBMarkQueue _satb_mark_queue; 42 PLAB* _gclab; 43 size_t _gclab_size; 44 uint _worker_id; 45 bool _force_satb_flush; 46 47 ShenandoahThreadLocalData() : 48 _gc_state(0), 49 _oom_during_evac(0), 50 _satb_mark_queue(&ShenandoahBarrierSet::satb_mark_queue_set()), 51 _gclab(NULL), 52 _gclab_size(0), 53 _worker_id(INVALID_WORKER_ID), 54 _force_satb_flush(false) { 55 } 56 57 ~ShenandoahThreadLocalData() { 58 if (_gclab != NULL) { 59 delete _gclab; 60 } 61 } 62 63 static ShenandoahThreadLocalData* data(Thread* thread) { 64 assert(UseShenandoahGC, "Sanity"); 65 return thread->gc_data<ShenandoahThreadLocalData>(); 66 } 67 68 static ByteSize satb_mark_queue_offset() { 69 return Thread::gc_data_offset() + byte_offset_of(ShenandoahThreadLocalData, _satb_mark_queue); 70 } 71 72 public: 73 static void create(Thread* thread) { 74 new (data(thread)) ShenandoahThreadLocalData(); 75 } 76 77 static void destroy(Thread* thread) { 78 data(thread)->~ShenandoahThreadLocalData(); 79 } 80 81 static SATBMarkQueue& satb_mark_queue(Thread* thread) { 82 return data(thread)->_satb_mark_queue; 83 } 84 85 static bool is_oom_during_evac(Thread* thread) { 86 return (data(thread)->_oom_during_evac & 1) == 1; 87 } 88 89 static void set_oom_during_evac(Thread* thread, bool oom) { 90 if (oom) { 91 data(thread)->_oom_during_evac |= 1; 92 } else { 93 data(thread)->_oom_during_evac &= ~1; 94 } 95 } 96 97 static void set_gc_state(Thread* thread, char gc_state) { 98 data(thread)->_gc_state = gc_state; 99 } 100 101 static char gc_state(Thread* thread) { 102 return data(thread)->_gc_state; 103 } 104 105 static void set_worker_id(Thread* thread, uint id) { 106 assert(thread->is_Worker_thread(), "Must be a worker thread"); 107 data(thread)->_worker_id = id; 108 } 109 110 static uint worker_id(Thread* thread) { 111 assert(thread->is_Worker_thread(), "Must be a worker thread"); 112 return data(thread)->_worker_id; 113 } 114 115 static void set_force_satb_flush(Thread* thread, bool v) { 116 data(thread)->_force_satb_flush = v; 117 } 118 119 static bool is_force_satb_flush(Thread* thread) { 120 return data(thread)->_force_satb_flush; 121 } 122 123 static void initialize_gclab(Thread* thread) { 124 assert (thread->is_Java_thread() || thread->is_Worker_thread(), "Only Java and GC worker threads are allowed to get GCLABs"); 125 assert(data(thread)->_gclab == NULL, "Only initialize once"); 126 data(thread)->_gclab = new PLAB(PLAB::min_size()); 127 data(thread)->_gclab_size = 0; 128 } 129 130 static PLAB* gclab(Thread* thread) { 131 return data(thread)->_gclab; 132 } 133 134 static size_t gclab_size(Thread* thread) { 135 return data(thread)->_gclab_size; 136 } 137 138 static void set_gclab_size(Thread* thread, size_t v) { 139 data(thread)->_gclab_size = v; 140 } 141 142 #ifdef ASSERT 143 static void set_evac_allowed(Thread* thread, bool evac_allowed) { 144 if (evac_allowed) { 145 data(thread)->_oom_during_evac |= 2; 146 } else { 147 data(thread)->_oom_during_evac &= ~2; 148 } 149 } 150 151 static bool is_evac_allowed(Thread* thread) { 152 return (data(thread)->_oom_during_evac & 2) == 2; 153 } 154 #endif 155 156 // Offsets 157 static ByteSize satb_mark_queue_active_offset() { 158 return satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_active(); 159 } 160 161 static ByteSize satb_mark_queue_index_offset() { 162 return satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_index(); 163 } 164 165 static ByteSize satb_mark_queue_buffer_offset() { 166 return satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_buf(); 167 } 168 169 static ByteSize gc_state_offset() { 170 return Thread::gc_data_offset() + byte_offset_of(ShenandoahThreadLocalData, _gc_state); 171 } 172 173 }; 174 175 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP