1 /* 2 * Copyright (c) 2013, 2021, 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 #include "precompiled.hpp" 26 27 #include "gc/shenandoah/shenandoahConcurrentGC.hpp" 28 #include "gc/shenandoah/shenandoahDegeneratedGC.hpp" 29 #include "gc/shenandoah/shenandoahFullGC.hpp" 30 #include "gc/shenandoah/shenandoahGeneration.hpp" 31 #include "gc/shenandoah/shenandoahHeap.inline.hpp" 32 #include "gc/shenandoah/shenandoahMark.inline.hpp" 33 #include "gc/shenandoah/shenandoahOopClosures.inline.hpp" 34 #include "gc/shenandoah/shenandoahUtils.hpp" 35 #include "gc/shenandoah/shenandoahVMOperations.hpp" 36 #include "memory/universe.hpp" 37 38 bool VM_ShenandoahReferenceOperation::doit_prologue() { 39 Heap_lock->lock(); 40 return true; 41 } 42 43 void VM_ShenandoahReferenceOperation::doit_epilogue() { 44 if (Universe::has_reference_pending_list()) { 45 Heap_lock->notify_all(); 46 } 47 Heap_lock->unlock(); 48 } 49 50 void VM_ShenandoahInitMark::doit() { 51 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT); 52 _gc->entry_init_mark(); 53 } 54 55 void VM_ShenandoahFinalMarkStartEvac::doit() { 56 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT); 57 _gc->entry_final_mark(); 58 } 59 60 void VM_ShenandoahFullGC::doit() { 61 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::FULL); 62 _full_gc->entry_full(_gc_cause); 63 } 64 65 void VM_ShenandoahDegeneratedGC::doit() { 66 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT); 67 _gc->entry_degenerated(); 68 } 69 70 void VM_ShenandoahInitUpdateRefs::doit() { 71 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT); 72 _gc->entry_init_updaterefs(); 73 } 74 75 void VM_ShenandoahFinalUpdateRefs::doit() { 76 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT); 77 _gc->entry_final_updaterefs(); 78 } 79 80 void VM_ShenandoahFinalRoots::doit() { 81 ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT); 82 if (_incr_region_ages) { 83 // TODO: Do we even care about this? Do we want to parallelize it? 84 ShenandoahHeap* heap = ShenandoahHeap::heap(); 85 ShenandoahMarkingContext* ctx = heap->complete_marking_context(); 86 87 for (size_t i = 0; i < heap->num_regions(); i++) { 88 ShenandoahHeapRegion *r = heap->get_region(i); 89 if (r->is_active() && r->is_young()) { 90 HeapWord* tams = ctx->top_at_mark_start(r); 91 HeapWord* top = r->top(); 92 if (top > tams) { 93 r->reset_age(); 94 } else { 95 r->increment_age(); 96 } 97 } 98 } 99 } 100 _gc->entry_final_roots(); 101 }