Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.hpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
| author | sla |
|---|---|
| date | Mon, 10 Jun 2013 11:30:51 +0200 |
| parents | 7b835924c31c |
| children | 836a62f43af9 5888334c9c24 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1387
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1387
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1387
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP |
| 26 #define SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP | |
| 27 | |
| 28 #include "gc_interface/gcCause.hpp" | |
| 10405 | 29 #include "gc_implementation/shared/gcWhen.hpp" |
| 1972 | 30 #include "memory/allocation.hpp" |
| 31 #include "memory/barrierSet.hpp" | |
| 32 #include "runtime/handles.hpp" | |
| 33 #include "runtime/perfData.hpp" | |
| 34 #include "runtime/safepoint.hpp" | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
35 #include "utilities/events.hpp" |
| 1972 | 36 |
| 0 | 37 // A "CollectedHeap" is an implementation of a java heap for HotSpot. This |
| 38 // is an abstract class: there may be many different kinds of heaps. This | |
| 39 // class defines the functions that a heap must implement, and contains | |
| 40 // infrastructure common to all heaps. | |
| 41 | |
| 10405 | 42 class AdaptiveSizePolicy; |
| 0 | 43 class BarrierSet; |
| 10405 | 44 class CollectorPolicy; |
| 45 class GCHeapSummary; | |
| 46 class GCTimer; | |
| 47 class GCTracer; | |
| 48 class MetaspaceSummary; | |
| 49 class Thread; | |
| 0 | 50 class ThreadClosure; |
| 10405 | 51 class VirtualSpaceSummary; |
| 0 | 52 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
53 class GCMessage : public FormatBuffer<1024> { |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
54 public: |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
55 bool is_before; |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
56 |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
57 public: |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
58 GCMessage() {} |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
59 }; |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
60 |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
61 class GCHeapLog : public EventLogBase<GCMessage> { |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
62 private: |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
63 void log_heap(bool before); |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
64 |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
65 public: |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
66 GCHeapLog() : EventLogBase<GCMessage>("GC Heap History") {} |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
67 |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
68 void log_heap_before() { |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
69 log_heap(true); |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
70 } |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
71 void log_heap_after() { |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
72 log_heap(false); |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
73 } |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
74 }; |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
75 |
| 0 | 76 // |
| 77 // CollectedHeap | |
| 78 // SharedHeap | |
| 79 // GenCollectedHeap | |
| 80 // G1CollectedHeap | |
| 81 // ParallelScavengeHeap | |
| 82 // | |
| 6197 | 83 class CollectedHeap : public CHeapObj<mtInternal> { |
| 0 | 84 friend class VMStructs; |
| 85 friend class IsGCActiveMark; // Block structured external access to _is_gc_active | |
| 86 | |
| 87 #ifdef ASSERT | |
| 88 static int _fire_out_of_memory_count; | |
| 89 #endif | |
| 90 | |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
91 // Used for filler objects (static, but initialized in ctor). |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
92 static size_t _filler_array_max_size; |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
93 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
94 GCHeapLog* _gc_heap_log; |
|
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
95 |
| 1166 | 96 // Used in support of ReduceInitialCardMarks; only consulted if COMPILER2 is being used |
| 97 bool _defer_initial_card_mark; | |
| 98 | |
| 0 | 99 protected: |
| 100 MemRegion _reserved; | |
| 101 BarrierSet* _barrier_set; | |
| 102 bool _is_gc_active; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4708
diff
changeset
|
103 uint _n_par_threads; |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
104 |
| 0 | 105 unsigned int _total_collections; // ... started |
| 106 unsigned int _total_full_collections; // ... started | |
| 107 NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;) | |
| 108 NOT_PRODUCT(volatile size_t _promotion_failure_alot_gc_number;) | |
| 109 | |
| 110 // Reason for current garbage collection. Should be set to | |
| 111 // a value reflecting no collection between collections. | |
| 112 GCCause::Cause _gc_cause; | |
| 113 GCCause::Cause _gc_lastcause; | |
| 114 PerfStringVariable* _perf_gc_cause; | |
| 115 PerfStringVariable* _perf_gc_lastcause; | |
| 116 | |
| 117 // Constructor | |
| 118 CollectedHeap(); | |
| 119 | |
| 1166 | 120 // Do common initializations that must follow instance construction, |
| 121 // for example, those needing virtual calls. | |
| 122 // This code could perhaps be moved into initialize() but would | |
| 123 // be slightly more awkward because we want the latter to be a | |
| 124 // pure virtual. | |
| 125 void pre_initialize(); | |
| 126 | |
|
3774
c9ca3f51cf41
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
3772
diff
changeset
|
127 // Create a new tlab. All TLAB allocations must go through this. |
| 0 | 128 virtual HeapWord* allocate_new_tlab(size_t size); |
| 129 | |
| 130 // Accumulate statistics on all tlabs. | |
| 131 virtual void accumulate_statistics_all_tlabs(); | |
| 132 | |
| 133 // Reinitialize tlabs before resuming mutators. | |
| 134 virtual void resize_all_tlabs(); | |
| 135 | |
| 136 // Allocate from the current thread's TLAB, with broken-out slow path. | |
| 10405 | 137 inline static HeapWord* allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size); |
| 138 static HeapWord* allocate_from_tlab_slow(KlassHandle klass, Thread* thread, size_t size); | |
| 0 | 139 |
| 140 // Allocate an uninitialized block of the given size, or returns NULL if | |
| 141 // this is impossible. | |
| 10405 | 142 inline static HeapWord* common_mem_allocate_noinit(KlassHandle klass, size_t size, TRAPS); |
| 0 | 143 |
| 144 // Like allocate_init, but the block returned by a successful allocation | |
| 145 // is guaranteed initialized to zeros. | |
| 10405 | 146 inline static HeapWord* common_mem_allocate_init(KlassHandle klass, size_t size, TRAPS); |
| 0 | 147 |
| 148 // Helper functions for (VM) allocation. | |
|
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
5965
diff
changeset
|
149 inline static void post_allocation_setup_common(KlassHandle klass, HeapWord* obj); |
| 0 | 150 inline static void post_allocation_setup_no_klass_install(KlassHandle klass, |
|
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
5965
diff
changeset
|
151 HeapWord* objPtr); |
| 0 | 152 |
|
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
5965
diff
changeset
|
153 inline static void post_allocation_setup_obj(KlassHandle klass, HeapWord* obj); |
| 0 | 154 |
| 155 inline static void post_allocation_setup_array(KlassHandle klass, | |
|
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
5965
diff
changeset
|
156 HeapWord* obj, int length); |
| 0 | 157 |
| 158 // Clears an allocated object. | |
| 159 inline static void init_obj(HeapWord* obj, size_t size); | |
| 160 | |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
161 // Filler object utilities. |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
162 static inline size_t filler_array_hdr_size(); |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
163 static inline size_t filler_array_min_size(); |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
164 |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
165 DEBUG_ONLY(static void fill_args_check(HeapWord* start, size_t words);) |
|
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
166 DEBUG_ONLY(static void zap_filler_array(HeapWord* start, size_t words, bool zap = true);) |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
167 |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
168 // Fill with a single array; caller must ensure filler_array_min_size() <= |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
169 // words <= filler_array_max_size(). |
|
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
170 static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true); |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
171 |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
172 // Fill with a single object (either an int array or a java.lang.Object). |
|
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
173 static inline void fill_with_object_impl(HeapWord* start, size_t words, bool zap = true); |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
174 |
| 10405 | 175 virtual void trace_heap(GCWhen::Type when, GCTracer* tracer); |
| 176 | |
| 0 | 177 // Verification functions |
| 178 virtual void check_for_bad_heap_word_value(HeapWord* addr, size_t size) | |
| 179 PRODUCT_RETURN; | |
| 180 virtual void check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) | |
| 181 PRODUCT_RETURN; | |
|
542
9a25e0c45327
6792421: assert(_bitMap->isMarked(addr+size-1),inconsistent Printezis mark)
jmasa
parents:
517
diff
changeset
|
182 debug_only(static void check_for_valid_allocation_state();) |
| 0 | 183 |
| 184 public: | |
| 185 enum Name { | |
| 186 Abstract, | |
| 187 SharedHeap, | |
| 188 GenCollectedHeap, | |
| 189 ParallelScavengeHeap, | |
| 190 G1CollectedHeap | |
| 191 }; | |
| 192 | |
|
5965
cc74fa5a91a9
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
4872
diff
changeset
|
193 static inline size_t filler_array_max_size() { |
|
cc74fa5a91a9
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
4872
diff
changeset
|
194 return _filler_array_max_size; |
|
cc74fa5a91a9
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
4872
diff
changeset
|
195 } |
|
cc74fa5a91a9
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
4872
diff
changeset
|
196 |
| 0 | 197 virtual CollectedHeap::Name kind() const { return CollectedHeap::Abstract; } |
| 198 | |
| 199 /** | |
| 200 * Returns JNI error code JNI_ENOMEM if memory could not be allocated, | |
| 201 * and JNI_OK on success. | |
| 202 */ | |
| 203 virtual jint initialize() = 0; | |
| 204 | |
| 205 // In many heaps, there will be a need to perform some initialization activities | |
| 206 // after the Universe is fully formed, but before general heap allocation is allowed. | |
| 207 // This is the correct place to place such initialization methods. | |
| 208 virtual void post_initialize() = 0; | |
| 209 | |
| 210 MemRegion reserved_region() const { return _reserved; } | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
211 address base() const { return (address)reserved_region().start(); } |
| 0 | 212 |
| 213 virtual size_t capacity() const = 0; | |
| 214 virtual size_t used() const = 0; | |
| 215 | |
| 216 // Return "true" if the part of the heap that allocates Java | |
| 217 // objects has reached the maximal committed limit that it can | |
| 218 // reach, without a garbage collection. | |
| 219 virtual bool is_maximal_no_gc() const = 0; | |
| 220 | |
| 221 // Support for java.lang.Runtime.maxMemory(): return the maximum amount of | |
| 222 // memory that the vm could make available for storing 'normal' java objects. | |
| 223 // This is based on the reserved address space, but should not include space | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
224 // that the vm uses internally for bookkeeping or temporary storage |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
225 // (e.g., in the case of the young gen, one of the survivor |
| 0 | 226 // spaces). |
| 227 virtual size_t max_capacity() const = 0; | |
| 228 | |
| 229 // Returns "TRUE" if "p" points into the reserved area of the heap. | |
| 230 bool is_in_reserved(const void* p) const { | |
| 231 return _reserved.contains(p); | |
| 232 } | |
| 233 | |
| 234 bool is_in_reserved_or_null(const void* p) const { | |
| 235 return p == NULL || is_in_reserved(p); | |
| 236 } | |
| 237 | |
| 4708 | 238 // Returns "TRUE" iff "p" points into the committed areas of the heap. |
| 239 // Since this method can be expensive in general, we restrict its | |
| 0 | 240 // use to assertion checking only. |
| 241 virtual bool is_in(const void* p) const = 0; | |
| 242 | |
| 243 bool is_in_or_null(const void* p) const { | |
| 244 return p == NULL || is_in(p); | |
| 245 } | |
| 246 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
247 bool is_in_place(Metadata** p) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
248 return !Universe::heap()->is_in(p); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
249 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
250 bool is_in_place(oop* p) { return Universe::heap()->is_in(p); } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
251 bool is_in_place(narrowOop* p) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
252 oop o = oopDesc::load_decode_heap_oop_not_null(p); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
253 return Universe::heap()->is_in((const void*)o); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
254 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
255 |
| 0 | 256 // Let's define some terms: a "closed" subset of a heap is one that |
| 257 // | |
| 258 // 1) contains all currently-allocated objects, and | |
| 259 // | |
| 260 // 2) is closed under reference: no object in the closed subset | |
| 261 // references one outside the closed subset. | |
| 262 // | |
| 263 // Membership in a heap's closed subset is useful for assertions. | |
| 264 // Clearly, the entire heap is a closed subset, so the default | |
| 265 // implementation is to use "is_in_reserved". But this may not be too | |
| 266 // liberal to perform useful checking. Also, the "is_in" predicate | |
| 267 // defines a closed subset, but may be too expensive, since "is_in" | |
| 268 // verifies that its argument points to an object head. The | |
| 269 // "closed_subset" method allows a heap to define an intermediate | |
| 270 // predicate, allowing more precise checking than "is_in_reserved" at | |
| 271 // lower cost than "is_in." | |
| 272 | |
| 273 // One important case is a heap composed of disjoint contiguous spaces, | |
| 274 // such as the Garbage-First collector. Such heaps have a convenient | |
| 275 // closed subset consisting of the allocated portions of those | |
| 276 // contiguous spaces. | |
| 277 | |
| 278 // Return "TRUE" iff the given pointer points into the heap's defined | |
| 279 // closed subset (which defaults to the entire heap). | |
| 280 virtual bool is_in_closed_subset(const void* p) const { | |
| 281 return is_in_reserved(p); | |
| 282 } | |
| 283 | |
| 284 bool is_in_closed_subset_or_null(const void* p) const { | |
| 285 return p == NULL || is_in_closed_subset(p); | |
| 286 } | |
| 287 | |
|
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
288 #ifdef ASSERT |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
289 // Returns true if "p" is in the part of the |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
290 // heap being collected. |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
291 virtual bool is_in_partial_collection(const void *p) = 0; |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
292 #endif |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
293 |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
845
diff
changeset
|
294 // An object is scavengable if its location may move during a scavenge. |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
845
diff
changeset
|
295 // (A scavenge is a GC which is not a full GC.) |
|
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
1972
diff
changeset
|
296 virtual bool is_scavengable(const void *p) = 0; |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
845
diff
changeset
|
297 |
| 0 | 298 void set_gc_cause(GCCause::Cause v) { |
| 299 if (UsePerfData) { | |
| 300 _gc_lastcause = _gc_cause; | |
| 301 _perf_gc_lastcause->set_value(GCCause::to_string(_gc_lastcause)); | |
| 302 _perf_gc_cause->set_value(GCCause::to_string(v)); | |
| 303 } | |
| 304 _gc_cause = v; | |
| 305 } | |
| 306 GCCause::Cause gc_cause() { return _gc_cause; } | |
| 307 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
308 // Number of threads currently working on GC tasks. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4708
diff
changeset
|
309 uint n_par_threads() { return _n_par_threads; } |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
310 |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
311 // May be overridden to set additional parallelism. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4708
diff
changeset
|
312 virtual void set_par_threads(uint t) { _n_par_threads = t; }; |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
313 |
| 4009 | 314 // Allocate and initialize instances of Class |
| 315 static oop Class_obj_allocate(KlassHandle klass, int size, KlassHandle real_klass, TRAPS); | |
| 316 | |
| 0 | 317 // General obj/array allocation facilities. |
| 318 inline static oop obj_allocate(KlassHandle klass, int size, TRAPS); | |
| 319 inline static oop array_allocate(KlassHandle klass, int size, int length, TRAPS); | |
|
3961
a92cdbac8b9e
7081933: Use zeroing elimination optimization for large array
kvn
parents:
3774
diff
changeset
|
320 inline static oop array_allocate_nozero(KlassHandle klass, int size, int length, TRAPS); |
| 0 | 321 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
322 inline static void post_allocation_install_obj_klass(KlassHandle klass, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
323 oop obj); |
| 0 | 324 |
| 325 // Raw memory allocation facilities | |
| 326 // The obj and array allocate methods are covers for these methods. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
327 // mem_allocate() should never be |
|
3774
c9ca3f51cf41
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
3772
diff
changeset
|
328 // called to allocate TLABs, only individual objects. |
| 0 | 329 virtual HeapWord* mem_allocate(size_t size, |
| 330 bool* gc_overhead_limit_was_exceeded) = 0; | |
| 331 | |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
332 // Utilities for turning raw memory into filler objects. |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
333 // |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
334 // min_fill_size() is the smallest region that can be filled. |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
335 // fill_with_objects() can fill arbitrary-sized regions of the heap using |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
336 // multiple objects. fill_with_object() is for regions known to be smaller |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
337 // than the largest array of integers; it uses a single object to fill the |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
338 // region and has slightly less overhead. |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
339 static size_t min_fill_size() { |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
340 return size_t(align_object_size(oopDesc::header_size())); |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
341 } |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
342 |
|
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
343 static void fill_with_objects(HeapWord* start, size_t words, bool zap = true); |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
344 |
|
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
345 static void fill_with_object(HeapWord* start, size_t words, bool zap = true); |
|
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
346 static void fill_with_object(MemRegion region, bool zap = true) { |
|
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
347 fill_with_object(region.start(), region.word_size(), zap); |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
348 } |
|
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
349 static void fill_with_object(HeapWord* start, HeapWord* end, bool zap = true) { |
|
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1027
diff
changeset
|
350 fill_with_object(start, pointer_delta(end, start), zap); |
|
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
351 } |
|
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
352 |
| 0 | 353 // Some heaps may offer a contiguous region for shared non-blocking |
| 354 // allocation, via inlined code (by exporting the address of the top and | |
| 355 // end fields defining the extent of the contiguous allocation region.) | |
| 356 | |
| 357 // This function returns "true" iff the heap supports this kind of | |
| 358 // allocation. (Default is "no".) | |
| 359 virtual bool supports_inline_contig_alloc() const { | |
| 360 return false; | |
| 361 } | |
| 362 // These functions return the addresses of the fields that define the | |
| 363 // boundaries of the contiguous allocation area. (These fields should be | |
| 364 // physically near to one another.) | |
| 365 virtual HeapWord** top_addr() const { | |
| 366 guarantee(false, "inline contiguous allocation not supported"); | |
| 367 return NULL; | |
| 368 } | |
| 369 virtual HeapWord** end_addr() const { | |
| 370 guarantee(false, "inline contiguous allocation not supported"); | |
| 371 return NULL; | |
| 372 } | |
| 373 | |
| 374 // Some heaps may be in an unparseable state at certain times between | |
| 375 // collections. This may be necessary for efficient implementation of | |
| 376 // certain allocation-related activities. Calling this function before | |
| 377 // attempting to parse a heap ensures that the heap is in a parsable | |
| 378 // state (provided other concurrent activity does not introduce | |
| 379 // unparsability). It is normally expected, therefore, that this | |
| 380 // method is invoked with the world stopped. | |
| 381 // NOTE: if you override this method, make sure you call | |
| 382 // super::ensure_parsability so that the non-generational | |
| 383 // part of the work gets done. See implementation of | |
| 384 // CollectedHeap::ensure_parsability and, for instance, | |
| 385 // that of GenCollectedHeap::ensure_parsability(). | |
| 386 // The argument "retire_tlabs" controls whether existing TLABs | |
| 387 // are merely filled or also retired, thus preventing further | |
| 388 // allocation from them and necessitating allocation of new TLABs. | |
| 389 virtual void ensure_parsability(bool retire_tlabs); | |
| 390 | |
| 391 // Return an estimate of the maximum allocation that could be performed | |
| 392 // without triggering any collection or expansion activity. In a | |
| 393 // generational collector, for example, this is probably the largest | |
| 394 // allocation that could be supported (without expansion) in the youngest | |
| 395 // generation. It is "unsafe" because no locks are taken; the result | |
| 396 // should be treated as an approximation, not a guarantee, for use in | |
| 397 // heuristic resizing decisions. | |
| 398 virtual size_t unsafe_max_alloc() = 0; | |
| 399 | |
| 400 // Section on thread-local allocation buffers (TLABs) | |
| 401 // If the heap supports thread-local allocation buffers, it should override | |
| 402 // the following methods: | |
| 403 // Returns "true" iff the heap supports thread-local allocation buffers. | |
| 404 // The default is "no". | |
| 405 virtual bool supports_tlab_allocation() const { | |
| 406 return false; | |
| 407 } | |
| 408 // The amount of space available for thread-local allocation buffers. | |
| 409 virtual size_t tlab_capacity(Thread *thr) const { | |
| 410 guarantee(false, "thread-local allocation buffers not supported"); | |
| 411 return 0; | |
| 412 } | |
| 413 // An estimate of the maximum allocation that could be performed | |
| 414 // for thread-local allocation buffers without triggering any | |
| 415 // collection or expansion activity. | |
| 416 virtual size_t unsafe_max_tlab_alloc(Thread *thr) const { | |
| 417 guarantee(false, "thread-local allocation buffers not supported"); | |
| 418 return 0; | |
| 419 } | |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
420 |
| 0 | 421 // Can a compiler initialize a new object without store barriers? |
| 422 // This permission only extends from the creation of a new object | |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
423 // via a TLAB up to the first subsequent safepoint. If such permission |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
424 // is granted for this heap type, the compiler promises to call |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
425 // defer_store_barrier() below on any slow path allocation of |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
426 // a new object for which such initializing store barriers will |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
427 // have been elided. |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
428 virtual bool can_elide_tlab_store_barriers() const = 0; |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
429 |
| 0 | 430 // If a compiler is eliding store barriers for TLAB-allocated objects, |
| 431 // there is probably a corresponding slow path which can produce | |
| 432 // an object allocated anywhere. The compiler's runtime support | |
| 433 // promises to call this function on such a slow-path-allocated | |
| 434 // object before performing initializations that have elided | |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
435 // store barriers. Returns new_obj, or maybe a safer copy thereof. |
| 1166 | 436 virtual oop new_store_pre_barrier(JavaThread* thread, oop new_obj); |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
437 |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
438 // Answers whether an initializing store to a new object currently |
| 1166 | 439 // allocated at the given address doesn't need a store |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
440 // barrier. Returns "true" if it doesn't need an initializing |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
441 // store barrier; answers "false" if it does. |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
442 virtual bool can_elide_initializing_store_barrier(oop new_obj) = 0; |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
443 |
| 1166 | 444 // If a compiler is eliding store barriers for TLAB-allocated objects, |
| 445 // we will be informed of a slow-path allocation by a call | |
| 446 // to new_store_pre_barrier() above. Such a call precedes the | |
| 447 // initialization of the object itself, and no post-store-barriers will | |
| 448 // be issued. Some heap types require that the barrier strictly follows | |
| 449 // the initializing stores. (This is currently implemented by deferring the | |
| 450 // barrier until the next slow-path allocation or gc-related safepoint.) | |
| 451 // This interface answers whether a particular heap type needs the card | |
| 452 // mark to be thus strictly sequenced after the stores. | |
| 453 virtual bool card_mark_must_follow_store() const = 0; | |
| 454 | |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
455 // If the CollectedHeap was asked to defer a store barrier above, |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
456 // this informs it to flush such a deferred store barrier to the |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
457 // remembered set. |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
993
diff
changeset
|
458 virtual void flush_deferred_store_barrier(JavaThread* thread); |
| 0 | 459 |
| 460 // Does this heap support heap inspection (+PrintClassHistogram?) | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
461 virtual bool supports_heap_inspection() const = 0; |
| 0 | 462 |
| 463 // Perform a collection of the heap; intended for use in implementing | |
| 464 // "System.gc". This probably implies as full a collection as the | |
| 465 // "CollectedHeap" supports. | |
| 466 virtual void collect(GCCause::Cause cause) = 0; | |
| 467 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
468 // Perform a full collection |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
469 virtual void do_full_collection(bool clear_all_soft_refs) = 0; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
470 |
| 0 | 471 // This interface assumes that it's being called by the |
| 472 // vm thread. It collects the heap assuming that the | |
| 473 // heap lock is already held and that we are executing in | |
| 474 // the context of the vm thread. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
475 virtual void collect_as_vm_thread(GCCause::Cause cause); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
476 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
477 // Callback from VM_CollectForMetadataAllocation operation. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
478 MetaWord* satisfy_failed_metadata_allocation(ClassLoaderData* loader_data, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
479 size_t size, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
480 Metaspace::MetadataType mdtype); |
| 0 | 481 |
| 482 // Returns the barrier set for this heap | |
| 483 BarrierSet* barrier_set() { return _barrier_set; } | |
| 484 | |
| 485 // Returns "true" iff there is a stop-world GC in progress. (I assume | |
| 486 // that it should answer "false" for the concurrent part of a concurrent | |
| 487 // collector -- dld). | |
| 488 bool is_gc_active() const { return _is_gc_active; } | |
| 489 | |
| 490 // Total number of GC collections (started) | |
| 491 unsigned int total_collections() const { return _total_collections; } | |
| 492 unsigned int total_full_collections() const { return _total_full_collections;} | |
| 493 | |
| 494 // Increment total number of GC collections (started) | |
| 495 // Should be protected but used by PSMarkSweep - cleanup for 1.4.2 | |
| 496 void increment_total_collections(bool full = false) { | |
| 497 _total_collections++; | |
| 498 if (full) { | |
| 499 increment_total_full_collections(); | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 void increment_total_full_collections() { _total_full_collections++; } | |
| 504 | |
| 505 // Return the AdaptiveSizePolicy for the heap. | |
| 506 virtual AdaptiveSizePolicy* size_policy() = 0; | |
| 507 | |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1166
diff
changeset
|
508 // Return the CollectorPolicy for the heap |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1166
diff
changeset
|
509 virtual CollectorPolicy* collector_policy() const = 0; |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1166
diff
changeset
|
510 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
511 void oop_iterate_no_header(OopClosure* cl); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
512 |
| 0 | 513 // Iterate over all the ref-containing fields of all objects, calling |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
514 // "cl.do_oop" on each. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
515 virtual void oop_iterate(ExtendedOopClosure* cl) = 0; |
| 0 | 516 |
| 517 // Iterate over all objects, calling "cl.do_object" on each. | |
| 518 virtual void object_iterate(ObjectClosure* cl) = 0; | |
| 519 | |
|
517
e9be0e04635a
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
481
diff
changeset
|
520 // Similar to object_iterate() except iterates only |
|
e9be0e04635a
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
481
diff
changeset
|
521 // over live objects. |
|
e9be0e04635a
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
481
diff
changeset
|
522 virtual void safe_object_iterate(ObjectClosure* cl) = 0; |
|
e9be0e04635a
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
481
diff
changeset
|
523 |
| 0 | 524 // NOTE! There is no requirement that a collector implement these |
| 525 // functions. | |
| 526 // | |
| 527 // A CollectedHeap is divided into a dense sequence of "blocks"; that is, | |
| 528 // each address in the (reserved) heap is a member of exactly | |
| 529 // one block. The defining characteristic of a block is that it is | |
| 530 // possible to find its size, and thus to progress forward to the next | |
| 531 // block. (Blocks may be of different sizes.) Thus, blocks may | |
| 532 // represent Java objects, or they might be free blocks in a | |
| 533 // free-list-based heap (or subheap), as long as the two kinds are | |
| 534 // distinguishable and the size of each is determinable. | |
| 535 | |
| 536 // Returns the address of the start of the "block" that contains the | |
| 537 // address "addr". We say "blocks" instead of "object" since some heaps | |
| 538 // may not pack objects densely; a chunk may either be an object or a | |
| 539 // non-object. | |
| 540 virtual HeapWord* block_start(const void* addr) const = 0; | |
| 541 | |
| 542 // Requires "addr" to be the start of a chunk, and returns its size. | |
| 543 // "addr + size" is required to be the start of a new chunk, or the end | |
| 544 // of the active area of the heap. | |
| 545 virtual size_t block_size(const HeapWord* addr) const = 0; | |
| 546 | |
| 547 // Requires "addr" to be the start of a block, and returns "TRUE" iff | |
| 548 // the block is an object. | |
| 549 virtual bool block_is_obj(const HeapWord* addr) const = 0; | |
| 550 | |
| 551 // Returns the longest time (in ms) that has elapsed since the last | |
| 552 // time that any part of the heap was examined by a garbage collection. | |
| 553 virtual jlong millis_since_last_gc() = 0; | |
| 554 | |
| 555 // Perform any cleanup actions necessary before allowing a verification. | |
| 556 virtual void prepare_for_verify() = 0; | |
| 557 | |
|
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
542
diff
changeset
|
558 // Generate any dumps preceding or following a full gc |
| 10405 | 559 void pre_full_gc_dump(GCTimer* timer); |
| 560 void post_full_gc_dump(GCTimer* timer); | |
| 561 | |
| 562 VirtualSpaceSummary create_heap_space_summary(); | |
| 563 GCHeapSummary create_heap_summary(); | |
| 564 | |
| 565 MetaspaceSummary create_metaspace_summary(); | |
|
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
542
diff
changeset
|
566 |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
567 // Print heap information on the given outputStream. |
| 0 | 568 virtual void print_on(outputStream* st) const = 0; |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
569 // The default behavior is to call print_on() on tty. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
570 virtual void print() const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
571 print_on(tty); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
572 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
573 // Print more detailed heap information on the given |
| 10405 | 574 // outputStream. The default behavior is to call print_on(). It is |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
575 // up to each subclass to override it and add any additional output |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
576 // it needs. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
577 virtual void print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
578 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
579 } |
| 0 | 580 |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
581 virtual void print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
582 st->print_cr("Heap:"); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
583 print_extended_on(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
584 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
585 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
586 _barrier_set->print_on(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
587 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
7176
diff
changeset
|
588 |
| 0 | 589 // Print all GC threads (other than the VM thread) |
| 590 // used by this heap. | |
| 591 virtual void print_gc_threads_on(outputStream* st) const = 0; | |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
592 // The default behavior is to call print_gc_threads_on() on tty. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
593 void print_gc_threads() { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
594 print_gc_threads_on(tty); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4009
diff
changeset
|
595 } |
| 0 | 596 // Iterator for all GC threads (other than VM thread) |
| 597 virtual void gc_threads_do(ThreadClosure* tc) const = 0; | |
| 598 | |
| 599 // Print any relevant tracing info that flags imply. | |
| 600 // Default implementation does nothing. | |
| 601 virtual void print_tracing_info() const = 0; | |
| 602 | |
| 10405 | 603 void print_heap_before_gc(); |
| 604 void print_heap_after_gc(); | |
| 605 | |
| 606 void trace_heap_before_gc(GCTracer* gc_tracer); | |
| 607 void trace_heap_after_gc(GCTracer* gc_tracer); | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4728
diff
changeset
|
608 |
| 0 | 609 // Heap verification |
| 6008 | 610 virtual void verify(bool silent, VerifyOption option) = 0; |
| 0 | 611 |
| 612 // Non product verification and debugging. | |
| 613 #ifndef PRODUCT | |
| 614 // Support for PromotionFailureALot. Return true if it's time to cause a | |
| 615 // promotion failure. The no-argument version uses | |
| 616 // this->_promotion_failure_alot_count as the counter. | |
| 617 inline bool promotion_should_fail(volatile size_t* count); | |
| 618 inline bool promotion_should_fail(); | |
| 619 | |
| 620 // Reset the PromotionFailureALot counters. Should be called at the end of a | |
| 10405 | 621 // GC in which promotion failure occurred. |
| 0 | 622 inline void reset_promotion_should_fail(volatile size_t* count); |
| 623 inline void reset_promotion_should_fail(); | |
| 624 #endif // #ifndef PRODUCT | |
| 625 | |
| 626 #ifdef ASSERT | |
| 627 static int fired_fake_oom() { | |
| 628 return (CIFireOOMAt > 1 && _fire_out_of_memory_count >= CIFireOOMAt); | |
| 629 } | |
| 630 #endif | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
631 |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
632 public: |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
633 // This is a convenience method that is used in cases where |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
634 // the actual number of GC worker threads is not pertinent but |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
635 // only whether there more than 0. Use of this method helps |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
636 // reduce the occurrence of ParallelGCThreads to uses where the |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
637 // actual number may be germane. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1552
diff
changeset
|
638 static bool use_parallel_gc_threads() { return ParallelGCThreads > 0; } |
| 4708 | 639 |
| 640 /////////////// Unit tests /////////////// | |
| 641 | |
| 642 NOT_PRODUCT(static void test_is_in();) | |
| 0 | 643 }; |
| 644 | |
| 645 // Class to set and reset the GC cause for a CollectedHeap. | |
| 646 | |
| 647 class GCCauseSetter : StackObj { | |
| 648 CollectedHeap* _heap; | |
| 649 GCCause::Cause _previous_cause; | |
| 650 public: | |
| 651 GCCauseSetter(CollectedHeap* heap, GCCause::Cause cause) { | |
| 652 assert(SafepointSynchronize::is_at_safepoint(), | |
| 653 "This method manipulates heap state without locking"); | |
| 654 _heap = heap; | |
| 655 _previous_cause = _heap->gc_cause(); | |
| 656 _heap->set_gc_cause(cause); | |
| 657 } | |
| 658 | |
| 659 ~GCCauseSetter() { | |
| 660 assert(SafepointSynchronize::is_at_safepoint(), | |
| 661 "This method manipulates heap state without locking"); | |
| 662 _heap->set_gc_cause(_previous_cause); | |
| 663 } | |
| 664 }; | |
| 1972 | 665 |
| 666 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP |