1 /* 2 * Copyright (c) 2015, Red Hat, Inc. and/or its affiliates. 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_SHENANDOAHROOTPROCESSOR_HPP 25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_HPP 26 27 #include "classfile/classLoaderData.hpp" 28 #include "code/codeCache.hpp" 29 #include "gc/shenandoah/shenandoahHeap.hpp" 30 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp" 31 #include "gc/shared/strongRootsScope.hpp" 32 #include "gc/shared/workgroup.hpp" 33 #include "memory/allocation.hpp" 34 #include "runtime/mutex.hpp" 35 36 class CLDClosure; 37 class CodeBlobClosure; 38 class G1CollectedHeap; 39 class G1GCPhaseTimes; 40 class G1ParPushHeapRSClosure; 41 class Monitor; 42 class OopClosure; 43 class SubTasksDone; 44 45 46 class ParallelCLDRootIterator VALUE_OBJ_CLASS_SPEC { 47 public: 48 ParallelCLDRootIterator(); 49 void root_cld_do(CLDClosure* strong, CLDClosure* weak); 50 }; 51 52 53 enum Shenandoah_process_roots_tasks { 54 SHENANDOAH_RP_PS_Universe_oops_do, 55 SHENANDOAH_RP_PS_JNIHandles_oops_do, 56 SHENANDOAH_RP_PS_JNIHandles_weak_oops_do, 57 SHENANDOAH_RP_PS_ObjectSynchronizer_oops_do, 58 SHENANDOAH_RP_PS_FlatProfiler_oops_do, 59 SHENANDOAH_RP_PS_Management_oops_do, 60 SHENANDOAH_RP_PS_SystemDictionary_oops_do, 61 SHENANDOAH_RP_PS_ClassLoaderDataGraph_oops_do, 62 SHENANDOAH_RP_PS_jvmti_oops_do, 63 SHENANDOAH_RP_PS_CodeCache_oops_do, 64 // Leave this one last. 65 SHENANDOAH_RP_PS_NumElements 66 }; 67 68 class ShenandoahRootProcessor : public StackObj { 69 SubTasksDone* _process_strong_tasks; 70 StrongRootsScope _srs; 71 ShenandoahCollectorPolicy::TimingPhase _phase; 72 ParallelCLDRootIterator _cld_iterator; 73 ParallelCodeCacheIterator _codecache_iterator; 74 ParallelObjectSynchronizerIterator _om_iterator; 75 CodeBlobClosure* _threads_nmethods_cl; 76 77 void process_java_roots(OopClosure* scan_non_heap_roots, 78 CLDClosure* scan_strong_clds, 79 CLDClosure* scan_weak_clds, 80 CodeBlobClosure* scan_strong_code, 81 CodeBlobClosure* nmethods_cl, 82 uint worker_i); 83 84 void process_vm_roots(OopClosure* scan_non_heap_roots, 85 OopClosure* scan_non_heap_weak_roots, 86 OopClosure* weak_jni_roots, 87 uint worker_i); 88 89 public: 90 ShenandoahRootProcessor(ShenandoahHeap* heap, uint n_workers, 91 ShenandoahCollectorPolicy::TimingPhase phase = ShenandoahCollectorPolicy::_num_phases); 92 ~ShenandoahRootProcessor(); 93 94 // Apply oops, clds and blobs to all strongly reachable roots in the system 95 void process_strong_roots(OopClosure* oops, OopClosure* weak_oops, 96 CLDClosure* clds, 97 CodeBlobClosure* blobs, 98 uint worker_id); 99 100 // Apply oops, clds and blobs to strongly and weakly reachable roots in the system 101 void process_all_roots(OopClosure* oops, OopClosure* weak_oops, 102 CLDClosure* clds, 103 CodeBlobClosure* blobs, 104 uint worker_id); 105 106 // Number of worker threads used by the root processor. 107 uint n_workers() const; 108 }; 109 110 class ShenandoahRootEvacuator : public StackObj { 111 SubTasksDone* _process_strong_tasks; 112 StrongRootsScope _srs; 113 ShenandoahCollectorPolicy::TimingPhase _phase; 114 ParallelCodeCacheIterator _codecache_iterator; 115 CodeBlobClosure* _threads_nmethods_cl; 116 117 public: 118 ShenandoahRootEvacuator(ShenandoahHeap* heap, uint n_workers, 119 ShenandoahCollectorPolicy::TimingPhase phase = ShenandoahCollectorPolicy::_num_phases); 120 ~ShenandoahRootEvacuator(); 121 122 void process_evacuate_roots(OopClosure* oops, 123 CodeBlobClosure* blobs, 124 uint worker_id); 125 126 // Number of worker threads used by the root processor. 127 uint n_workers() const; 128 }; 129 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_HPP