author | pliden |
Tue, 31 Mar 2015 08:27:30 +0200 | |
changeset 29803 | 6e259ffa8b72 |
parent 29081 | c61eb4914428 |
child 29808 | 9bbc65318fdd |
permissions | -rw-r--r-- |
1 | 1 |
/* |
29081
c61eb4914428
8072911: Remove includes of oop.inline.hpp from .hpp files
stefank
parents:
28940
diff
changeset
|
2 |
* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved. |
1 | 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 |
* |
|
5547
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
5343
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
5343
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
5343
diff
changeset
|
21 |
* questions. |
1 | 22 |
* |
23 |
*/ |
|
24 |
||
7397 | 25 |
#ifndef SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP |
26 |
#define SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP |
|
27 |
||
28 |
#include "gc_interface/gcCause.hpp" |
|
18025 | 29 |
#include "gc_implementation/shared/gcWhen.hpp" |
7397 | 30 |
#include "memory/allocation.hpp" |
31 |
#include "runtime/handles.hpp" |
|
32 |
#include "runtime/perfData.hpp" |
|
33 |
#include "runtime/safepoint.hpp" |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
34 |
#include "utilities/events.hpp" |
7397 | 35 |
|
1 | 36 |
// A "CollectedHeap" is an implementation of a java heap for HotSpot. This |
37 |
// is an abstract class: there may be many different kinds of heaps. This |
|
38 |
// class defines the functions that a heap must implement, and contains |
|
39 |
// infrastructure common to all heaps. |
|
40 |
||
18025 | 41 |
class AdaptiveSizePolicy; |
1 | 42 |
class BarrierSet; |
18025 | 43 |
class CollectorPolicy; |
44 |
class GCHeapSummary; |
|
45 |
class GCTimer; |
|
46 |
class GCTracer; |
|
47 |
class MetaspaceSummary; |
|
48 |
class Thread; |
|
1 | 49 |
class ThreadClosure; |
18025 | 50 |
class VirtualSpaceSummary; |
19339 | 51 |
class nmethod; |
1 | 52 |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
53 |
class GCMessage : public FormatBuffer<1024> { |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
54 |
public: |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
55 |
bool is_before; |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
56 |
|
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
57 |
public: |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
58 |
GCMessage() {} |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
59 |
}; |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
60 |
|
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
61 |
class GCHeapLog : public EventLogBase<GCMessage> { |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
62 |
private: |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
63 |
void log_heap(bool before); |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
64 |
|
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
65 |
public: |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
66 |
GCHeapLog() : EventLogBase<GCMessage>("GC Heap History") {} |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
67 |
|
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
68 |
void log_heap_before() { |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
69 |
log_heap(true); |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
70 |
} |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
71 |
void log_heap_after() { |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
72 |
log_heap(false); |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
73 |
} |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
74 |
}; |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
75 |
|
1 | 76 |
// |
77 |
// CollectedHeap |
|
78 |
// SharedHeap |
|
79 |
// GenCollectedHeap |
|
80 |
// G1CollectedHeap |
|
81 |
// ParallelScavengeHeap |
|
82 |
// |
|
13195 | 83 |
class CollectedHeap : public CHeapObj<mtInternal> { |
1 | 84 |
friend class VMStructs; |
85 |
friend class IsGCActiveMark; // Block structured external access to _is_gc_active |
|
86 |
||
26829
26315213bab8
8055091: CollectedHeap::_reserved usage should be cleaned up
mlarsson
parents:
25905
diff
changeset
|
87 |
private: |
1 | 88 |
#ifdef ASSERT |
89 |
static int _fire_out_of_memory_count; |
|
90 |
#endif |
|
91 |
||
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
92 |
// Used for filler objects (static, but initialized in ctor). |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
93 |
static size_t _filler_array_max_size; |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
94 |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
95 |
GCHeapLog* _gc_heap_log; |
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
96 |
|
4637 | 97 |
// Used in support of ReduceInitialCardMarks; only consulted if COMPILER2 is being used |
98 |
bool _defer_initial_card_mark; |
|
99 |
||
26829
26315213bab8
8055091: CollectedHeap::_reserved usage should be cleaned up
mlarsson
parents:
25905
diff
changeset
|
100 |
MemRegion _reserved; |
26315213bab8
8055091: CollectedHeap::_reserved usage should be cleaned up
mlarsson
parents:
25905
diff
changeset
|
101 |
|
1 | 102 |
protected: |
103 |
BarrierSet* _barrier_set; |
|
104 |
bool _is_gc_active; |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11247
diff
changeset
|
105 |
uint _n_par_threads; |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
106 |
|
1 | 107 |
unsigned int _total_collections; // ... started |
108 |
unsigned int _total_full_collections; // ... started |
|
109 |
NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;) |
|
110 |
NOT_PRODUCT(volatile size_t _promotion_failure_alot_gc_number;) |
|
111 |
||
112 |
// Reason for current garbage collection. Should be set to |
|
113 |
// a value reflecting no collection between collections. |
|
114 |
GCCause::Cause _gc_cause; |
|
115 |
GCCause::Cause _gc_lastcause; |
|
116 |
PerfStringVariable* _perf_gc_cause; |
|
117 |
PerfStringVariable* _perf_gc_lastcause; |
|
118 |
||
119 |
// Constructor |
|
120 |
CollectedHeap(); |
|
121 |
||
4637 | 122 |
// Do common initializations that must follow instance construction, |
123 |
// for example, those needing virtual calls. |
|
124 |
// This code could perhaps be moved into initialize() but would |
|
125 |
// be slightly more awkward because we want the latter to be a |
|
126 |
// pure virtual. |
|
127 |
void pre_initialize(); |
|
128 |
||
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
129 |
// Create a new tlab. All TLAB allocations must go through this. |
1 | 130 |
virtual HeapWord* allocate_new_tlab(size_t size); |
131 |
||
132 |
// Accumulate statistics on all tlabs. |
|
133 |
virtual void accumulate_statistics_all_tlabs(); |
|
134 |
||
135 |
// Reinitialize tlabs before resuming mutators. |
|
136 |
virtual void resize_all_tlabs(); |
|
137 |
||
138 |
// Allocate from the current thread's TLAB, with broken-out slow path. |
|
18025 | 139 |
inline static HeapWord* allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size); |
140 |
static HeapWord* allocate_from_tlab_slow(KlassHandle klass, Thread* thread, size_t size); |
|
1 | 141 |
|
142 |
// Allocate an uninitialized block of the given size, or returns NULL if |
|
143 |
// this is impossible. |
|
18025 | 144 |
inline static HeapWord* common_mem_allocate_noinit(KlassHandle klass, size_t size, TRAPS); |
1 | 145 |
|
146 |
// Like allocate_init, but the block returned by a successful allocation |
|
147 |
// is guaranteed initialized to zeros. |
|
18025 | 148 |
inline static HeapWord* common_mem_allocate_init(KlassHandle klass, size_t size, TRAPS); |
1 | 149 |
|
150 |
// Helper functions for (VM) allocation. |
|
12236
51d6463cfd9d
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
12229
diff
changeset
|
151 |
inline static void post_allocation_setup_common(KlassHandle klass, HeapWord* obj); |
1 | 152 |
inline static void post_allocation_setup_no_klass_install(KlassHandle klass, |
12236
51d6463cfd9d
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
12229
diff
changeset
|
153 |
HeapWord* objPtr); |
1 | 154 |
|
23995
fc58ec725daf
8039904: dtrace/hotspot/Monitors/Monitors001 fails with "assert(s > 0) failed: Bad size calculated"
coleenp
parents:
23872
diff
changeset
|
155 |
inline static void post_allocation_setup_obj(KlassHandle klass, HeapWord* obj, int size); |
1 | 156 |
|
157 |
inline static void post_allocation_setup_array(KlassHandle klass, |
|
12236
51d6463cfd9d
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
12229
diff
changeset
|
158 |
HeapWord* obj, int length); |
1 | 159 |
|
160 |
// Clears an allocated object. |
|
161 |
inline static void init_obj(HeapWord* obj, size_t size); |
|
162 |
||
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
163 |
// Filler object utilities. |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
164 |
static inline size_t filler_array_hdr_size(); |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
165 |
static inline size_t filler_array_min_size(); |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
166 |
|
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
167 |
DEBUG_ONLY(static void fill_args_check(HeapWord* start, size_t words);) |
4636
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
168 |
DEBUG_ONLY(static void zap_filler_array(HeapWord* start, size_t words, bool zap = true);) |
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
169 |
|
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
170 |
// Fill with a single array; caller must ensure filler_array_min_size() <= |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
171 |
// words <= filler_array_max_size(). |
4636
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
172 |
static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true); |
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
173 |
|
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
174 |
// Fill with a single object (either an int array or a java.lang.Object). |
4636
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
175 |
static inline void fill_with_object_impl(HeapWord* start, size_t words, bool zap = true); |
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
176 |
|
28940
c314cf1db3fa
8066566: Refactor ParNewGeneration to contain ParNewTracer
mlarsson
parents:
27623
diff
changeset
|
177 |
virtual void trace_heap(GCWhen::Type when, const GCTracer* tracer); |
18025 | 178 |
|
1 | 179 |
// Verification functions |
180 |
virtual void check_for_bad_heap_word_value(HeapWord* addr, size_t size) |
|
181 |
PRODUCT_RETURN; |
|
182 |
virtual void check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) |
|
183 |
PRODUCT_RETURN; |
|
2006
f2d2f0f20063
6792421: assert(_bitMap->isMarked(addr+size-1),inconsistent Printezis mark)
jmasa
parents:
1893
diff
changeset
|
184 |
debug_only(static void check_for_valid_allocation_state();) |
1 | 185 |
|
186 |
public: |
|
187 |
enum Name { |
|
188 |
Abstract, |
|
189 |
SharedHeap, |
|
190 |
GenCollectedHeap, |
|
191 |
ParallelScavengeHeap, |
|
192 |
G1CollectedHeap |
|
193 |
}; |
|
194 |
||
12229
c34a85c8f5aa
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
11636
diff
changeset
|
195 |
static inline size_t filler_array_max_size() { |
c34a85c8f5aa
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
11636
diff
changeset
|
196 |
return _filler_array_max_size; |
c34a85c8f5aa
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
11636
diff
changeset
|
197 |
} |
c34a85c8f5aa
7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents:
11636
diff
changeset
|
198 |
|
1 | 199 |
virtual CollectedHeap::Name kind() const { return CollectedHeap::Abstract; } |
200 |
||
201 |
/** |
|
202 |
* Returns JNI error code JNI_ENOMEM if memory could not be allocated, |
|
203 |
* and JNI_OK on success. |
|
204 |
*/ |
|
205 |
virtual jint initialize() = 0; |
|
206 |
||
207 |
// In many heaps, there will be a need to perform some initialization activities |
|
208 |
// after the Universe is fully formed, but before general heap allocation is allowed. |
|
209 |
// This is the correct place to place such initialization methods. |
|
210 |
virtual void post_initialize() = 0; |
|
211 |
||
24093
095cc0a63ed9
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
22552
diff
changeset
|
212 |
// Stop any onging concurrent work and prepare for exit. |
095cc0a63ed9
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
22552
diff
changeset
|
213 |
virtual void stop() {} |
095cc0a63ed9
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
22552
diff
changeset
|
214 |
|
26829
26315213bab8
8055091: CollectedHeap::_reserved usage should be cleaned up
mlarsson
parents:
25905
diff
changeset
|
215 |
void initialize_reserved_region(HeapWord *start, HeapWord *end); |
1 | 216 |
MemRegion reserved_region() const { return _reserved; } |
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
217 |
address base() const { return (address)reserved_region().start(); } |
1 | 218 |
|
219 |
virtual size_t capacity() const = 0; |
|
220 |
virtual size_t used() const = 0; |
|
221 |
||
222 |
// Return "true" if the part of the heap that allocates Java |
|
223 |
// objects has reached the maximal committed limit that it can |
|
224 |
// reach, without a garbage collection. |
|
225 |
virtual bool is_maximal_no_gc() const = 0; |
|
226 |
||
227 |
// Support for java.lang.Runtime.maxMemory(): return the maximum amount of |
|
228 |
// memory that the vm could make available for storing 'normal' java objects. |
|
229 |
// This is based on the reserved address space, but should not include space |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
230 |
// that the vm uses internally for bookkeeping or temporary storage |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
231 |
// (e.g., in the case of the young gen, one of the survivor |
1 | 232 |
// spaces). |
233 |
virtual size_t max_capacity() const = 0; |
|
234 |
||
235 |
// Returns "TRUE" if "p" points into the reserved area of the heap. |
|
236 |
bool is_in_reserved(const void* p) const { |
|
237 |
return _reserved.contains(p); |
|
238 |
} |
|
239 |
||
240 |
bool is_in_reserved_or_null(const void* p) const { |
|
241 |
return p == NULL || is_in_reserved(p); |
|
242 |
} |
|
243 |
||
11247 | 244 |
// Returns "TRUE" iff "p" points into the committed areas of the heap. |
245 |
// Since this method can be expensive in general, we restrict its |
|
1 | 246 |
// use to assertion checking only. |
247 |
virtual bool is_in(const void* p) const = 0; |
|
248 |
||
249 |
bool is_in_or_null(const void* p) const { |
|
250 |
return p == NULL || is_in(p); |
|
251 |
} |
|
252 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
253 |
bool is_in_place(Metadata** p) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
254 |
return !Universe::heap()->is_in(p); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
255 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
256 |
bool is_in_place(oop* p) { return Universe::heap()->is_in(p); } |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
257 |
bool is_in_place(narrowOop* p) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
258 |
oop o = oopDesc::load_decode_heap_oop_not_null(p); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
259 |
return Universe::heap()->is_in((const void*)o); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
260 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
261 |
|
1 | 262 |
// Let's define some terms: a "closed" subset of a heap is one that |
263 |
// |
|
264 |
// 1) contains all currently-allocated objects, and |
|
265 |
// |
|
266 |
// 2) is closed under reference: no object in the closed subset |
|
267 |
// references one outside the closed subset. |
|
268 |
// |
|
269 |
// Membership in a heap's closed subset is useful for assertions. |
|
270 |
// Clearly, the entire heap is a closed subset, so the default |
|
271 |
// implementation is to use "is_in_reserved". But this may not be too |
|
272 |
// liberal to perform useful checking. Also, the "is_in" predicate |
|
273 |
// defines a closed subset, but may be too expensive, since "is_in" |
|
274 |
// verifies that its argument points to an object head. The |
|
275 |
// "closed_subset" method allows a heap to define an intermediate |
|
276 |
// predicate, allowing more precise checking than "is_in_reserved" at |
|
277 |
// lower cost than "is_in." |
|
278 |
||
279 |
// One important case is a heap composed of disjoint contiguous spaces, |
|
280 |
// such as the Garbage-First collector. Such heaps have a convenient |
|
281 |
// closed subset consisting of the allocated portions of those |
|
282 |
// contiguous spaces. |
|
283 |
||
284 |
// Return "TRUE" iff the given pointer points into the heap's defined |
|
285 |
// closed subset (which defaults to the entire heap). |
|
286 |
virtual bool is_in_closed_subset(const void* p) const { |
|
287 |
return is_in_reserved(p); |
|
288 |
} |
|
289 |
||
290 |
bool is_in_closed_subset_or_null(const void* p) const { |
|
291 |
return p == NULL || is_in_closed_subset(p); |
|
292 |
} |
|
293 |
||
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
294 |
// An object is scavengable if its location may move during a scavenge. |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
295 |
// (A scavenge is a GC which is not a full GC.) |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
7397
diff
changeset
|
296 |
virtual bool is_scavengable(const void *p) = 0; |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
297 |
|
1 | 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 |
||
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
308 |
// Number of threads currently working on GC tasks. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11247
diff
changeset
|
309 |
uint n_par_threads() { return _n_par_threads; } |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
310 |
|
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
311 |
// May be overridden to set additional parallelism. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11247
diff
changeset
|
312 |
virtual void set_par_threads(uint t) { _n_par_threads = t; }; |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
313 |
|
1 | 314 |
// General obj/array allocation facilities. |
315 |
inline static oop obj_allocate(KlassHandle klass, int size, TRAPS); |
|
316 |
inline static oop array_allocate(KlassHandle klass, int size, int length, TRAPS); |
|
10566
630c177ec580
7081933: Use zeroing elimination optimization for large array
kvn
parents:
9997
diff
changeset
|
317 |
inline static oop array_allocate_nozero(KlassHandle klass, int size, int length, TRAPS); |
1 | 318 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
319 |
inline static void post_allocation_install_obj_klass(KlassHandle klass, |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
320 |
oop obj); |
1 | 321 |
|
322 |
// Raw memory allocation facilities |
|
323 |
// The obj and array allocate methods are covers for these methods. |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
324 |
// mem_allocate() should never be |
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
325 |
// called to allocate TLABs, only individual objects. |
1 | 326 |
virtual HeapWord* mem_allocate(size_t size, |
327 |
bool* gc_overhead_limit_was_exceeded) = 0; |
|
328 |
||
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
329 |
// Utilities for turning raw memory into filler objects. |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
330 |
// |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
331 |
// min_fill_size() is the smallest region that can be filled. |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
332 |
// fill_with_objects() can fill arbitrary-sized regions of the heap using |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
333 |
// multiple objects. fill_with_object() is for regions known to be smaller |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
334 |
// than the largest array of integers; it uses a single object to fill the |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
335 |
// region and has slightly less overhead. |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
336 |
static size_t min_fill_size() { |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
337 |
return size_t(align_object_size(oopDesc::header_size())); |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
338 |
} |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
339 |
|
4636
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
340 |
static void fill_with_objects(HeapWord* start, size_t words, bool zap = true); |
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
341 |
|
4636
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
342 |
static void fill_with_object(HeapWord* start, size_t words, bool zap = true); |
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
343 |
static void fill_with_object(MemRegion region, bool zap = true) { |
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
344 |
fill_with_object(region.start(), region.word_size(), zap); |
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
345 |
} |
4636
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
346 |
static void fill_with_object(HeapWord* start, HeapWord* end, bool zap = true) { |
90e004691873
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
4030
diff
changeset
|
347 |
fill_with_object(start, pointer_delta(end, start), zap); |
1668
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
348 |
} |
8ec481b8f514
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
1388
diff
changeset
|
349 |
|
25905
04a3d83cc752
8031323: Optionally align objects copied to survivor spaces
jmasa
parents:
24109
diff
changeset
|
350 |
// Return the address "addr" aligned by "alignment_in_bytes" if such |
04a3d83cc752
8031323: Optionally align objects copied to survivor spaces
jmasa
parents:
24109
diff
changeset
|
351 |
// an address is below "end". Return NULL otherwise. |
04a3d83cc752
8031323: Optionally align objects copied to survivor spaces
jmasa
parents:
24109
diff
changeset
|
352 |
inline static HeapWord* align_allocation_or_fail(HeapWord* addr, |
04a3d83cc752
8031323: Optionally align objects copied to survivor spaces
jmasa
parents:
24109
diff
changeset
|
353 |
HeapWord* end, |
04a3d83cc752
8031323: Optionally align objects copied to survivor spaces
jmasa
parents:
24109
diff
changeset
|
354 |
unsigned short alignment_in_bytes); |
04a3d83cc752
8031323: Optionally align objects copied to survivor spaces
jmasa
parents:
24109
diff
changeset
|
355 |
|
1 | 356 |
// Some heaps may offer a contiguous region for shared non-blocking |
357 |
// allocation, via inlined code (by exporting the address of the top and |
|
358 |
// end fields defining the extent of the contiguous allocation region.) |
|
359 |
||
360 |
// This function returns "true" iff the heap supports this kind of |
|
361 |
// allocation. (Default is "no".) |
|
362 |
virtual bool supports_inline_contig_alloc() const { |
|
363 |
return false; |
|
364 |
} |
|
365 |
// These functions return the addresses of the fields that define the |
|
366 |
// boundaries of the contiguous allocation area. (These fields should be |
|
367 |
// physically near to one another.) |
|
368 |
virtual HeapWord** top_addr() const { |
|
369 |
guarantee(false, "inline contiguous allocation not supported"); |
|
370 |
return NULL; |
|
371 |
} |
|
372 |
virtual HeapWord** end_addr() const { |
|
373 |
guarantee(false, "inline contiguous allocation not supported"); |
|
374 |
return NULL; |
|
375 |
} |
|
376 |
||
377 |
// Some heaps may be in an unparseable state at certain times between |
|
378 |
// collections. This may be necessary for efficient implementation of |
|
379 |
// certain allocation-related activities. Calling this function before |
|
380 |
// attempting to parse a heap ensures that the heap is in a parsable |
|
381 |
// state (provided other concurrent activity does not introduce |
|
382 |
// unparsability). It is normally expected, therefore, that this |
|
383 |
// method is invoked with the world stopped. |
|
384 |
// NOTE: if you override this method, make sure you call |
|
385 |
// super::ensure_parsability so that the non-generational |
|
386 |
// part of the work gets done. See implementation of |
|
387 |
// CollectedHeap::ensure_parsability and, for instance, |
|
388 |
// that of GenCollectedHeap::ensure_parsability(). |
|
389 |
// The argument "retire_tlabs" controls whether existing TLABs |
|
390 |
// are merely filled or also retired, thus preventing further |
|
391 |
// allocation from them and necessitating allocation of new TLABs. |
|
392 |
virtual void ensure_parsability(bool retire_tlabs); |
|
393 |
||
394 |
// Section on thread-local allocation buffers (TLABs) |
|
395 |
// If the heap supports thread-local allocation buffers, it should override |
|
396 |
// the following methods: |
|
397 |
// Returns "true" iff the heap supports thread-local allocation buffers. |
|
398 |
// The default is "no". |
|
22552 | 399 |
virtual bool supports_tlab_allocation() const = 0; |
400 |
||
1 | 401 |
// The amount of space available for thread-local allocation buffers. |
22552 | 402 |
virtual size_t tlab_capacity(Thread *thr) const = 0; |
403 |
||
404 |
// The amount of used space for thread-local allocation buffers for the given thread. |
|
405 |
virtual size_t tlab_used(Thread *thr) const = 0; |
|
406 |
||
407 |
virtual size_t max_tlab_size() const; |
|
408 |
||
1 | 409 |
// An estimate of the maximum allocation that could be performed |
410 |
// for thread-local allocation buffers without triggering any |
|
411 |
// collection or expansion activity. |
|
412 |
virtual size_t unsafe_max_tlab_alloc(Thread *thr) const { |
|
413 |
guarantee(false, "thread-local allocation buffers not supported"); |
|
414 |
return 0; |
|
415 |
} |
|
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
416 |
|
1 | 417 |
// Can a compiler initialize a new object without store barriers? |
418 |
// This permission only extends from the creation of a new object |
|
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
419 |
// via a TLAB up to the first subsequent safepoint. If such permission |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
420 |
// is granted for this heap type, the compiler promises to call |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
421 |
// defer_store_barrier() below on any slow path allocation of |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
422 |
// a new object for which such initializing store barriers will |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
423 |
// have been elided. |
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
360
diff
changeset
|
424 |
virtual bool can_elide_tlab_store_barriers() const = 0; |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
360
diff
changeset
|
425 |
|
1 | 426 |
// If a compiler is eliding store barriers for TLAB-allocated objects, |
427 |
// there is probably a corresponding slow path which can produce |
|
428 |
// an object allocated anywhere. The compiler's runtime support |
|
429 |
// promises to call this function on such a slow-path-allocated |
|
430 |
// object before performing initializations that have elided |
|
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
431 |
// store barriers. Returns new_obj, or maybe a safer copy thereof. |
4637 | 432 |
virtual oop new_store_pre_barrier(JavaThread* thread, oop new_obj); |
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
433 |
|
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
434 |
// Answers whether an initializing store to a new object currently |
4637 | 435 |
// allocated at the given address doesn't need a store |
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
436 |
// barrier. Returns "true" if it doesn't need an initializing |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
437 |
// store barrier; answers "false" if it does. |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
438 |
virtual bool can_elide_initializing_store_barrier(oop new_obj) = 0; |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
439 |
|
4637 | 440 |
// If a compiler is eliding store barriers for TLAB-allocated objects, |
441 |
// we will be informed of a slow-path allocation by a call |
|
442 |
// to new_store_pre_barrier() above. Such a call precedes the |
|
443 |
// initialization of the object itself, and no post-store-barriers will |
|
444 |
// be issued. Some heap types require that the barrier strictly follows |
|
445 |
// the initializing stores. (This is currently implemented by deferring the |
|
446 |
// barrier until the next slow-path allocation or gc-related safepoint.) |
|
447 |
// This interface answers whether a particular heap type needs the card |
|
448 |
// mark to be thus strictly sequenced after the stores. |
|
449 |
virtual bool card_mark_must_follow_store() const = 0; |
|
450 |
||
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
451 |
// If the CollectedHeap was asked to defer a store barrier above, |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
452 |
// this informs it to flush such a deferred store barrier to the |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
453 |
// remembered set. |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3912
diff
changeset
|
454 |
virtual void flush_deferred_store_barrier(JavaThread* thread); |
1 | 455 |
|
456 |
// Does this heap support heap inspection (+PrintClassHistogram?) |
|
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
360
diff
changeset
|
457 |
virtual bool supports_heap_inspection() const = 0; |
1 | 458 |
|
459 |
// Perform a collection of the heap; intended for use in implementing |
|
460 |
// "System.gc". This probably implies as full a collection as the |
|
461 |
// "CollectedHeap" supports. |
|
462 |
virtual void collect(GCCause::Cause cause) = 0; |
|
463 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
464 |
// Perform a full collection |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
465 |
virtual void do_full_collection(bool clear_all_soft_refs) = 0; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
466 |
|
1 | 467 |
// This interface assumes that it's being called by the |
468 |
// vm thread. It collects the heap assuming that the |
|
469 |
// heap lock is already held and that we are executing in |
|
470 |
// the context of the vm thread. |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
471 |
virtual void collect_as_vm_thread(GCCause::Cause cause); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
472 |
|
1 | 473 |
// Returns the barrier set for this heap |
474 |
BarrierSet* barrier_set() { return _barrier_set; } |
|
475 |
||
476 |
// Returns "true" iff there is a stop-world GC in progress. (I assume |
|
477 |
// that it should answer "false" for the concurrent part of a concurrent |
|
478 |
// collector -- dld). |
|
479 |
bool is_gc_active() const { return _is_gc_active; } |
|
480 |
||
481 |
// Total number of GC collections (started) |
|
482 |
unsigned int total_collections() const { return _total_collections; } |
|
483 |
unsigned int total_full_collections() const { return _total_full_collections;} |
|
484 |
||
485 |
// Increment total number of GC collections (started) |
|
486 |
// Should be protected but used by PSMarkSweep - cleanup for 1.4.2 |
|
487 |
void increment_total_collections(bool full = false) { |
|
488 |
_total_collections++; |
|
489 |
if (full) { |
|
490 |
increment_total_full_collections(); |
|
491 |
} |
|
492 |
} |
|
493 |
||
494 |
void increment_total_full_collections() { _total_full_collections++; } |
|
495 |
||
496 |
// Return the AdaptiveSizePolicy for the heap. |
|
497 |
virtual AdaptiveSizePolicy* size_policy() = 0; |
|
498 |
||
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
499 |
// Return the CollectorPolicy for the heap |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
500 |
virtual CollectorPolicy* collector_policy() const = 0; |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4637
diff
changeset
|
501 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
502 |
void oop_iterate_no_header(OopClosure* cl); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
503 |
|
1 | 504 |
// Iterate over all the ref-containing fields of all objects, calling |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
505 |
// "cl.do_oop" on each. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
506 |
virtual void oop_iterate(ExtendedOopClosure* cl) = 0; |
1 | 507 |
|
508 |
// Iterate over all objects, calling "cl.do_object" on each. |
|
509 |
virtual void object_iterate(ObjectClosure* cl) = 0; |
|
510 |
||
1893
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1668
diff
changeset
|
511 |
// Similar to object_iterate() except iterates only |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1668
diff
changeset
|
512 |
// over live objects. |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1668
diff
changeset
|
513 |
virtual void safe_object_iterate(ObjectClosure* cl) = 0; |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1668
diff
changeset
|
514 |
|
1 | 515 |
// NOTE! There is no requirement that a collector implement these |
516 |
// functions. |
|
517 |
// |
|
518 |
// A CollectedHeap is divided into a dense sequence of "blocks"; that is, |
|
519 |
// each address in the (reserved) heap is a member of exactly |
|
520 |
// one block. The defining characteristic of a block is that it is |
|
521 |
// possible to find its size, and thus to progress forward to the next |
|
522 |
// block. (Blocks may be of different sizes.) Thus, blocks may |
|
523 |
// represent Java objects, or they might be free blocks in a |
|
524 |
// free-list-based heap (or subheap), as long as the two kinds are |
|
525 |
// distinguishable and the size of each is determinable. |
|
526 |
||
527 |
// Returns the address of the start of the "block" that contains the |
|
528 |
// address "addr". We say "blocks" instead of "object" since some heaps |
|
529 |
// may not pack objects densely; a chunk may either be an object or a |
|
530 |
// non-object. |
|
531 |
virtual HeapWord* block_start(const void* addr) const = 0; |
|
532 |
||
533 |
// Requires "addr" to be the start of a chunk, and returns its size. |
|
534 |
// "addr + size" is required to be the start of a new chunk, or the end |
|
535 |
// of the active area of the heap. |
|
536 |
virtual size_t block_size(const HeapWord* addr) const = 0; |
|
537 |
||
538 |
// Requires "addr" to be the start of a block, and returns "TRUE" iff |
|
539 |
// the block is an object. |
|
540 |
virtual bool block_is_obj(const HeapWord* addr) const = 0; |
|
541 |
||
542 |
// Returns the longest time (in ms) that has elapsed since the last |
|
543 |
// time that any part of the heap was examined by a garbage collection. |
|
544 |
virtual jlong millis_since_last_gc() = 0; |
|
545 |
||
546 |
// Perform any cleanup actions necessary before allowing a verification. |
|
547 |
virtual void prepare_for_verify() = 0; |
|
548 |
||
2141
e9a644aaff87
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
2006
diff
changeset
|
549 |
// Generate any dumps preceding or following a full gc |
18025 | 550 |
void pre_full_gc_dump(GCTimer* timer); |
551 |
void post_full_gc_dump(GCTimer* timer); |
|
552 |
||
553 |
VirtualSpaceSummary create_heap_space_summary(); |
|
554 |
GCHeapSummary create_heap_summary(); |
|
555 |
||
556 |
MetaspaceSummary create_metaspace_summary(); |
|
2141
e9a644aaff87
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
2006
diff
changeset
|
557 |
|
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
558 |
// Print heap information on the given outputStream. |
1 | 559 |
virtual void print_on(outputStream* st) const = 0; |
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
560 |
// The default behavior is to call print_on() on tty. |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
561 |
virtual void print() const { |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
562 |
print_on(tty); |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
563 |
} |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
564 |
// Print more detailed heap information on the given |
18025 | 565 |
// outputStream. The default behavior is to call print_on(). It is |
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
566 |
// up to each subclass to override it and add any additional output |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
567 |
// it needs. |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
568 |
virtual void print_extended_on(outputStream* st) const { |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
569 |
print_on(st); |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
570 |
} |
1 | 571 |
|
29081
c61eb4914428
8072911: Remove includes of oop.inline.hpp from .hpp files
stefank
parents:
28940
diff
changeset
|
572 |
virtual void print_on_error(outputStream* st) const; |
16685
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
14579
diff
changeset
|
573 |
|
1 | 574 |
// Print all GC threads (other than the VM thread) |
575 |
// used by this heap. |
|
576 |
virtual void print_gc_threads_on(outputStream* st) const = 0; |
|
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
577 |
// The default behavior is to call print_gc_threads_on() on tty. |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
578 |
void print_gc_threads() { |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
579 |
print_gc_threads_on(tty); |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10742
diff
changeset
|
580 |
} |
1 | 581 |
// Iterator for all GC threads (other than VM thread) |
582 |
virtual void gc_threads_do(ThreadClosure* tc) const = 0; |
|
583 |
||
584 |
// Print any relevant tracing info that flags imply. |
|
585 |
// Default implementation does nothing. |
|
586 |
virtual void print_tracing_info() const = 0; |
|
587 |
||
18025 | 588 |
void print_heap_before_gc(); |
589 |
void print_heap_after_gc(); |
|
590 |
||
19339 | 591 |
// Registering and unregistering an nmethod (compiled code) with the heap. |
592 |
// Override with specific mechanism for each specialized heap type. |
|
593 |
virtual void register_nmethod(nmethod* nm); |
|
594 |
virtual void unregister_nmethod(nmethod* nm); |
|
595 |
||
28940
c314cf1db3fa
8066566: Refactor ParNewGeneration to contain ParNewTracer
mlarsson
parents:
27623
diff
changeset
|
596 |
void trace_heap_before_gc(const GCTracer* gc_tracer); |
c314cf1db3fa
8066566: Refactor ParNewGeneration to contain ParNewTracer
mlarsson
parents:
27623
diff
changeset
|
597 |
void trace_heap_after_gc(const GCTracer* gc_tracer); |
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
598 |
|
1 | 599 |
// Heap verification |
12379 | 600 |
virtual void verify(bool silent, VerifyOption option) = 0; |
1 | 601 |
|
602 |
// Non product verification and debugging. |
|
603 |
#ifndef PRODUCT |
|
604 |
// Support for PromotionFailureALot. Return true if it's time to cause a |
|
605 |
// promotion failure. The no-argument version uses |
|
606 |
// this->_promotion_failure_alot_count as the counter. |
|
607 |
inline bool promotion_should_fail(volatile size_t* count); |
|
608 |
inline bool promotion_should_fail(); |
|
609 |
||
610 |
// Reset the PromotionFailureALot counters. Should be called at the end of a |
|
18025 | 611 |
// GC in which promotion failure occurred. |
1 | 612 |
inline void reset_promotion_should_fail(volatile size_t* count); |
613 |
inline void reset_promotion_should_fail(); |
|
614 |
#endif // #ifndef PRODUCT |
|
615 |
||
616 |
#ifdef ASSERT |
|
617 |
static int fired_fake_oom() { |
|
618 |
return (CIFireOOMAt > 1 && _fire_out_of_memory_count >= CIFireOOMAt); |
|
619 |
} |
|
620 |
#endif |
|
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
621 |
|
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
622 |
public: |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
623 |
// This is a convenience method that is used in cases where |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
624 |
// the actual number of GC worker threads is not pertinent but |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
625 |
// only whether there more than 0. Use of this method helps |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
626 |
// reduce the occurrence of ParallelGCThreads to uses where the |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
627 |
// actual number may be germane. |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
5547
diff
changeset
|
628 |
static bool use_parallel_gc_threads() { return ParallelGCThreads > 0; } |
11247 | 629 |
|
26842
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
630 |
// Copy the current allocation context statistics for the specified contexts. |
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
631 |
// For each context in contexts, set the corresponding entries in the totals |
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
632 |
// and accuracy arrays to the current values held by the statistics. Each |
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
633 |
// array should be of length len. |
27623
3f190bd7182f
8061234: ResourceContext.requestAccurateUpdate() is unreliable
sjohanss
parents:
26842
diff
changeset
|
634 |
// Returns true if there are more stats available. |
3f190bd7182f
8061234: ResourceContext.requestAccurateUpdate() is unreliable
sjohanss
parents:
26842
diff
changeset
|
635 |
virtual bool copy_allocation_context_stats(const jint* contexts, |
26842
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
636 |
jlong* totals, |
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
637 |
jbyte* accuracy, |
27623
3f190bd7182f
8061234: ResourceContext.requestAccurateUpdate() is unreliable
sjohanss
parents:
26842
diff
changeset
|
638 |
jint len) { |
3f190bd7182f
8061234: ResourceContext.requestAccurateUpdate() is unreliable
sjohanss
parents:
26842
diff
changeset
|
639 |
return false; |
3f190bd7182f
8061234: ResourceContext.requestAccurateUpdate() is unreliable
sjohanss
parents:
26842
diff
changeset
|
640 |
} |
26842
5081db39f634
8057824: methods to copy allocation context statistics
jcoomes
parents:
26829
diff
changeset
|
641 |
|
11247 | 642 |
/////////////// Unit tests /////////////// |
643 |
||
644 |
NOT_PRODUCT(static void test_is_in();) |
|
1 | 645 |
}; |
646 |
||
647 |
// Class to set and reset the GC cause for a CollectedHeap. |
|
648 |
||
649 |
class GCCauseSetter : StackObj { |
|
650 |
CollectedHeap* _heap; |
|
651 |
GCCause::Cause _previous_cause; |
|
652 |
public: |
|
653 |
GCCauseSetter(CollectedHeap* heap, GCCause::Cause cause) { |
|
654 |
assert(SafepointSynchronize::is_at_safepoint(), |
|
655 |
"This method manipulates heap state without locking"); |
|
656 |
_heap = heap; |
|
657 |
_previous_cause = _heap->gc_cause(); |
|
658 |
_heap->set_gc_cause(cause); |
|
659 |
} |
|
660 |
||
661 |
~GCCauseSetter() { |
|
662 |
assert(SafepointSynchronize::is_at_safepoint(), |
|
663 |
"This method manipulates heap state without locking"); |
|
664 |
_heap->set_gc_cause(_previous_cause); |
|
665 |
} |
|
666 |
}; |
|
7397 | 667 |
|
668 |
#endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_HPP |