annotate src/hotspot/share/gc/epsilon/epsilonHeap.hpp @ 56508:f67f588ebf15

Merge
author shade
date Thu, 03 May 2018 09:43:47 +0200
parents e1871d34a188
children 92316ff16d5c
rev   line source
shade@55767 1 /*
shade@56350 2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
shade@55767 3 *
shade@55767 4 * This code is free software; you can redistribute it and/or modify it
shade@55767 5 * under the terms of the GNU General Public License version 2 only, as
shade@55767 6 * published by the Free Software Foundation.
shade@55767 7 *
shade@55767 8 * This code is distributed in the hope that it will be useful, but WITHOUT
shade@55767 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
shade@55767 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
shade@55767 11 * version 2 for more details (a copy is included in the LICENSE file that
shade@55767 12 * accompanied this code).
shade@55767 13 *
shade@55767 14 * You should have received a copy of the GNU General Public License version
shade@55767 15 * 2 along with this work; if not, write to the Free Software Foundation,
shade@55767 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
shade@55767 17 *
shade@55767 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
shade@55767 19 * or visit www.oracle.com if you need additional information or have any
shade@55767 20 * questions.
shade@55767 21 *
shade@55767 22 */
shade@55767 23
shade@55767 24 #ifndef SHARE_VM_GC_EPSILON_COLLECTEDHEAP_HPP
shade@55767 25 #define SHARE_VM_GC_EPSILON_COLLECTEDHEAP_HPP
shade@55767 26
shade@55767 27 #include "gc/shared/collectedHeap.hpp"
shade@56354 28 #include "gc/shared/softRefPolicy.hpp"
shade@55767 29 #include "gc/shared/space.hpp"
shade@55975 30 #include "services/memoryManager.hpp"
shade@55767 31 #include "gc/epsilon/epsilonCollectorPolicy.hpp"
shade@55767 32 #include "gc/epsilon/epsilonMonitoringSupport.hpp"
shade@55767 33 #include "gc/epsilon/epsilonBarrierSet.hpp"
shade@55767 34 #include "gc/epsilon/epsilon_globals.hpp"
shade@55767 35
shade@55939 36 class EpsilonHeap : public CollectedHeap {
shade@55767 37 private:
shade@55767 38 EpsilonCollectorPolicy* _policy;
shade@56276 39 SoftRefPolicy _soft_ref_policy;
shade@55767 40 EpsilonMonitoringSupport* _monitoring_support;
shade@55975 41 MemoryPool* _pool;
shade@55975 42 GCMemoryManager _memory_manager;
shade@55767 43 ContiguousSpace* _space;
shade@55767 44 VirtualSpace _virtual_space;
shade@55767 45 size_t _max_tlab_size;
shade@55767 46 size_t _last_counter_update;
shade@55979 47 size_t _last_heap_print;
shade@55979 48 size_t _step_counter_update;
shade@55979 49 size_t _step_heap_print;
shade@56492 50
shade@55767 51 public:
shade@56492 52 static EpsilonHeap* heap();
shade@56492 53
shade@55975 54 EpsilonHeap(EpsilonCollectorPolicy* p) :
shade@55975 55 _policy(p),
shade@55975 56 _memory_manager("Epsilon Heap", "") {};
shade@55767 57
shade@55767 58 virtual Name kind() const {
shade@56422 59 return CollectedHeap::Epsilon;
shade@55767 60 }
shade@55767 61
shade@56352 62 virtual const char* name() const {
shade@56352 63 return "Epsilon";
shade@55767 64 }
shade@55767 65
shade@56352 66 virtual CollectorPolicy* collector_policy() const {
shade@55767 67 return _policy;
shade@55767 68 }
shade@55767 69
shade@56276 70 virtual SoftRefPolicy* soft_ref_policy() {
shade@56276 71 return &_soft_ref_policy;
shade@56276 72 }
shade@56276 73
shade@56492 74 virtual jint initialize();
shade@56492 75 virtual void post_initialize();
shade@56492 76 virtual void initialize_serviceability();
shade@56492 77
shade@56492 78 virtual GrowableArray<GCMemoryManager*> memory_managers();
shade@56492 79 virtual GrowableArray<MemoryPool*> memory_pools();
shade@56492 80
shade@56492 81 virtual size_t max_capacity() const { return _virtual_space.reserved_size(); }
shade@56492 82 virtual size_t capacity() const { return _virtual_space.committed_size(); }
shade@56492 83 virtual size_t used() const { return _space->used(); }
shade@56492 84
shade@56492 85 virtual bool is_in(const void* p) const {
shade@56492 86 return _space->is_in(p);
shade@56492 87 }
shade@56492 88
shade@56492 89 virtual bool is_scavengable(oop obj) {
shade@56492 90 // No GC is going to happen, therefore no objects ever move.
shade@56492 91 return false;
shade@56492 92 }
shade@56492 93
shade@56492 94 virtual bool is_maximal_no_gc() const {
shade@56492 95 // No GC is going to happen. Return "we are at max", when we are about to fail.
shade@56492 96 return used() == capacity();
shade@56492 97 }
shade@56492 98
shade@56492 99 // Allocation
shade@56492 100 HeapWord* allocate_work(size_t size);
shade@56492 101 virtual HeapWord* mem_allocate(size_t size, bool* gc_overhead_limit_was_exceeded);
shade@56508 102 virtual HeapWord* allocate_new_tlab(size_t min_size,
shade@56508 103 size_t requested_size,
shade@56508 104 size_t* actual_size);
shade@56492 105
shade@56492 106 // TLAB allocation
shade@56492 107 virtual bool supports_tlab_allocation() const { return UseTLAB; }
shade@56492 108 virtual size_t tlab_capacity(Thread* thr) const { return capacity(); }
shade@56492 109 virtual size_t tlab_used(Thread* thr) const { return used(); }
shade@56492 110 virtual size_t max_tlab_size() const { return _max_tlab_size; }
shade@56492 111 virtual size_t unsafe_max_tlab_alloc(Thread* thr) const;
shade@56492 112
shade@56492 113 virtual void collect(GCCause::Cause cause);
shade@56492 114 virtual void do_full_collection(bool clear_all_soft_refs);
shade@56492 115
shade@56492 116 // Heap walking support
shade@56492 117 virtual void safe_object_iterate(ObjectClosure* cl);
shade@56352 118 virtual void object_iterate(ObjectClosure* cl) {
shade@55767 119 safe_object_iterate(cl);
shade@55767 120 }
shade@55767 121
shade@56492 122 // No support for block parsing.
shade@56492 123 virtual HeapWord* block_start(const void* addr) const { return NULL; }
shade@56492 124 virtual size_t block_size(const HeapWord* addr) const { return 0; }
shade@56492 125 virtual bool block_is_obj(const HeapWord* addr) const { return false; }
shade@55767 126
shade@56492 127 // No GC threads
shade@56492 128 virtual void print_gc_threads_on(outputStream* st) const {}
shade@56492 129 virtual void gc_threads_do(ThreadClosure* tc) const {}
shade@55767 130
shade@56492 131 // No heap verification
shade@56492 132 virtual void prepare_for_verify() {}
shade@56492 133 virtual void verify(VerifyOption option) {}
shade@55767 134
shade@55767 135 virtual jlong millis_since_last_gc() {
shade@55767 136 // Report time since the VM start
shade@55767 137 return os::elapsed_counter() / NANOSECS_PER_MILLISEC;
shade@55767 138 }
shade@55767 139
shade@56352 140 virtual void print_on(outputStream* st) const;
shade@56352 141 virtual void print_tracing_info() const;
shade@56352 142
shade@55767 143 };
shade@55767 144
shade@55767 145 #endif // SHARE_VM_GC_EPSILON_COLLECTEDHEAP_HPP