1 /* 2 * Copyright (c) 2019, 2020, Red Hat, Inc. 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 */ 24 25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP 26 #define SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP 27 28 #include "classfile/classLoaderDataGraph.hpp" 29 #include "classfile/stringTable.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "gc/shared/oopStorageParState.inline.hpp" 32 #include "gc/shenandoah/shenandoahClosures.inline.hpp" 33 #include "gc/shenandoah/shenandoahConcurrentRoots.hpp" 34 #include "gc/shenandoah/shenandoahHeap.inline.hpp" 35 #include "gc/shenandoah/shenandoahPhaseTimings.hpp" 36 #include "gc/shenandoah/shenandoahRootProcessor.hpp" 37 #include "gc/shenandoah/shenandoahUtils.hpp" 38 #include "gc/shenandoah/heuristics/shenandoahHeuristics.hpp" 39 #include "memory/resourceArea.hpp" 40 #include "prims/resolvedMethodTable.hpp" 41 #include "runtime/safepoint.hpp" 42 43 template <bool CONCURRENT> 44 inline ShenandoahVMRoot<CONCURRENT>::ShenandoahVMRoot(OopStorage* storage, 45 ShenandoahPhaseTimings::Phase phase, ShenandoahPhaseTimings::ParPhase par_phase) : 46 _itr(storage), _phase(phase), _par_phase(par_phase) { 47 } 48 49 template <bool CONCURRENT> 50 template <typename Closure> 51 inline void ShenandoahVMRoot<CONCURRENT>::oops_do(Closure* cl, uint worker_id) { 52 ShenandoahWorkerTimingsTracker timer(_phase, _par_phase, worker_id); 53 _itr.oops_do(cl); 54 } 55 56 template <bool CONCURRENT> 57 inline ShenandoahWeakRoot<CONCURRENT>::ShenandoahWeakRoot(OopStorage* storage, 58 ShenandoahPhaseTimings::Phase phase, ShenandoahPhaseTimings::ParPhase par_phase) : 59 ShenandoahVMRoot<CONCURRENT>(storage, phase, par_phase) { 60 } 61 62 inline ShenandoahWeakRoot<false>::ShenandoahWeakRoot(OopStorage* storage, 63 ShenandoahPhaseTimings::Phase phase, ShenandoahPhaseTimings::ParPhase par_phase) : 64 _itr(storage), _phase(phase), _par_phase(par_phase) { 65 } 66 67 template <typename IsAliveClosure, typename KeepAliveClosure> 68 void ShenandoahWeakRoot<false /* concurrent */>::weak_oops_do(IsAliveClosure* is_alive, KeepAliveClosure* keep_alive, uint worker_id) { 69 ShenandoahWorkerTimingsTracker timer(_phase, _par_phase, worker_id); 70 _itr.weak_oops_do(is_alive, keep_alive); 71 } 72 73 template <bool CONCURRENT> 74 ShenandoahWeakRoots<CONCURRENT>::ShenandoahWeakRoots() : 75 _jni_roots(OopStorageSet::jni_weak(), ShenandoahPhaseTimings::JNIWeakRoots), 76 _string_table_roots(OopStorageSet::string_table_weak(), ShenandoahPhaseTimings::StringTableRoots), 77 _resolved_method_table_roots(OopStorageSet::resolved_method_table_weak(), ShenandoahPhaseTimings::ResolvedMethodTableRoots), 78 _vm_roots(OopStorageSet::vm_weak(), ShenandoahPhaseTimings::VMWeakRoots) { 79 } 80 81 template <bool CONCURRENT> 82 template <typename Closure> 83 void ShenandoahWeakRoots<CONCURRENT>::oops_do(Closure* cl, uint worker_id) { 84 _jni_roots.oops_do(cl, worker_id); 85 _string_table_roots.oops_do(cl, worker_id); 86 _resolved_method_table_roots.oops_do(cl, worker_id); 87 _vm_roots.oops_do(cl, worker_id); 88 } 89 90 inline ShenandoahWeakRoots<false /* concurrent */>::ShenandoahWeakRoots(ShenandoahPhaseTimings::Phase phase) : 91 _jni_roots(OopStorageSet::jni_weak(), phase, ShenandoahPhaseTimings::JNIWeakRoots), 92 _string_table_roots(OopStorageSet::string_table_weak(), phase, ShenandoahPhaseTimings::StringTableRoots), 93 _resolved_method_table_roots(OopStorageSet::resolved_method_table_weak(), phase, ShenandoahPhaseTimings::ResolvedMethodTableRoots), 94 _vm_roots(OopStorageSet::vm_weak(), phase, ShenandoahPhaseTimings::VMWeakRoots) { 95 } 96 97 template <typename IsAliveClosure, typename KeepAliveClosure> 98 void ShenandoahWeakRoots<false /* concurrent*/>::weak_oops_do(IsAliveClosure* is_alive, KeepAliveClosure* keep_alive, uint worker_id) { 99 _jni_roots.weak_oops_do(is_alive, keep_alive, worker_id); 100 _string_table_roots.weak_oops_do(is_alive, keep_alive, worker_id); 101 _resolved_method_table_roots.weak_oops_do(is_alive, keep_alive, worker_id); 102 _vm_roots.weak_oops_do(is_alive, keep_alive, worker_id); 103 } 104 105 template <typename Closure> 106 void ShenandoahWeakRoots<false /* concurrent */>::oops_do(Closure* cl, uint worker_id) { 107 AlwaysTrueClosure always_true; 108 weak_oops_do<AlwaysTrueClosure, Closure>(&always_true, cl, worker_id); 109 } 110 111 template <bool CONCURRENT> 112 ShenandoahVMRoots<CONCURRENT>::ShenandoahVMRoots(ShenandoahPhaseTimings::Phase phase) : 113 _jni_handle_roots(OopStorageSet::jni_global(), phase, ShenandoahPhaseTimings::JNIRoots), 114 _vm_global_roots(OopStorageSet::vm_global(), phase, ShenandoahPhaseTimings::VMGlobalRoots) { 115 } 116 117 template <bool CONCURRENT> 118 template <typename T> 119 void ShenandoahVMRoots<CONCURRENT>::oops_do(T* cl, uint worker_id) { 120 _jni_handle_roots.oops_do(cl, worker_id); 121 _vm_global_roots.oops_do(cl, worker_id); 122 } 123 124 template <bool CONCURRENT, bool SINGLE_THREADED> 125 ShenandoahClassLoaderDataRoots<CONCURRENT, SINGLE_THREADED>::ShenandoahClassLoaderDataRoots(ShenandoahPhaseTimings::Phase phase) : 126 _phase(phase) { 127 if (!SINGLE_THREADED) { 128 ClassLoaderDataGraph::clear_claimed_marks(); 129 } 130 if (CONCURRENT) { 131 ClassLoaderDataGraph_lock->lock(); 132 } 133 } 134 135 template <bool CONCURRENT, bool SINGLE_THREADED> 136 ShenandoahClassLoaderDataRoots<CONCURRENT, SINGLE_THREADED>::~ShenandoahClassLoaderDataRoots() { 137 if (CONCURRENT) { 138 ClassLoaderDataGraph_lock->unlock(); 139 } 140 } 141 142 143 template <bool CONCURRENT, bool SINGLE_THREADED> 144 void ShenandoahClassLoaderDataRoots<CONCURRENT, SINGLE_THREADED>::always_strong_cld_do(CLDClosure* clds, uint worker_id) { 145 if (SINGLE_THREADED) { 146 assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint"); 147 assert(Thread::current()->is_VM_thread(), "Single threaded CLDG iteration can only be done by VM thread"); 148 ClassLoaderDataGraph::always_strong_cld_do(clds); 149 } else { 150 ShenandoahWorkerTimingsTracker timer(_phase, ShenandoahPhaseTimings::CLDGRoots, worker_id); 151 ClassLoaderDataGraph::always_strong_cld_do(clds); 152 } 153 } 154 155 template <bool CONCURRENT, bool SINGLE_THREADED> 156 void ShenandoahClassLoaderDataRoots<CONCURRENT, SINGLE_THREADED>::cld_do(CLDClosure* clds, uint worker_id) { 157 if (SINGLE_THREADED) { 158 assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint"); 159 assert(Thread::current()->is_VM_thread(), "Single threaded CLDG iteration can only be done by VM thread"); 160 ClassLoaderDataGraph::cld_do(clds); 161 } else { 162 ShenandoahWorkerTimingsTracker timer(_phase, ShenandoahPhaseTimings::CLDGRoots, worker_id); 163 ClassLoaderDataGraph::cld_do(clds); 164 } 165 } 166 167 class ShenandoahParallelOopsDoThreadClosure : public ThreadClosure { 168 private: 169 OopClosure* _f; 170 CodeBlobClosure* _cf; 171 ThreadClosure* _thread_cl; 172 public: 173 ShenandoahParallelOopsDoThreadClosure(OopClosure* f, CodeBlobClosure* cf, ThreadClosure* thread_cl) : 174 _f(f), _cf(cf), _thread_cl(thread_cl) {} 175 176 void do_thread(Thread* t) { 177 if (_thread_cl != NULL) { 178 _thread_cl->do_thread(t); 179 } 180 t->oops_do(_f, _cf); 181 } 182 }; 183 184 template <typename IsAlive, typename KeepAlive> 185 void ShenandoahRootUpdater::roots_do(uint worker_id, IsAlive* is_alive, KeepAlive* keep_alive) { 186 CodeBlobToOopClosure update_blobs(keep_alive, CodeBlobToOopClosure::FixRelocations); 187 ShenandoahCodeBlobAndDisarmClosure blobs_and_disarm_Cl(keep_alive); 188 CodeBlobToOopClosure* codes_cl = ShenandoahConcurrentRoots::can_do_concurrent_class_unloading() ? 189 static_cast<CodeBlobToOopClosure*>(&blobs_and_disarm_Cl) : 190 static_cast<CodeBlobToOopClosure*>(&update_blobs); 191 192 CLDToOopClosure clds(keep_alive, ClassLoaderData::_claim_strong); 193 194 _serial_roots.oops_do(keep_alive, worker_id); 195 _vm_roots.oops_do(keep_alive, worker_id); 196 197 _cld_roots.cld_do(&clds, worker_id); 198 _code_roots.code_blobs_do(codes_cl, worker_id); 199 _thread_roots.oops_do(keep_alive, NULL, worker_id); 200 201 _serial_weak_roots.weak_oops_do(is_alive, keep_alive, worker_id); 202 _weak_roots.weak_oops_do(is_alive, keep_alive, worker_id); 203 _dedup_roots.oops_do(is_alive, keep_alive, worker_id); 204 } 205 206 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_INLINE_HPP