Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.cpp @ 1890:f5c8d6e5bfee
Merge
author | jcoomes |
---|---|
date | Mon, 01 Nov 2010 10:49:14 -0700 |
parents | 8b10f48633dc |
children | f95d63e2154a |
rev | line source |
---|---|
0 | 1 /* |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1579
diff
changeset
|
2 * Copyright (c) 2001, 2010, 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:
1549
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1549
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:
1549
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_collectedHeap.cpp.incl" | |
27 | |
28 | |
29 #ifdef ASSERT | |
30 int CollectedHeap::_fire_out_of_memory_count = 0; | |
31 #endif | |
32 | |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
33 size_t CollectedHeap::_filler_array_max_size = 0; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
34 |
0 | 35 // Memory state functions. |
36 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1579
diff
changeset
|
37 |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1579
diff
changeset
|
38 CollectedHeap::CollectedHeap() : _n_par_threads(0) |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1579
diff
changeset
|
39 |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
40 { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
41 const size_t max_len = size_t(arrayOopDesc::max_array_length(T_INT)); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
42 const size_t elements_per_word = HeapWordSize / sizeof(jint); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
43 _filler_array_max_size = align_object_size(filler_array_hdr_size() + |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
44 max_len * elements_per_word); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
45 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
46 _barrier_set = NULL; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
47 _is_gc_active = false; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
48 _total_collections = _total_full_collections = 0; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
49 _gc_cause = _gc_lastcause = GCCause::_no_gc; |
0 | 50 NOT_PRODUCT(_promotion_failure_alot_count = 0;) |
51 NOT_PRODUCT(_promotion_failure_alot_gc_number = 0;) | |
52 | |
53 if (UsePerfData) { | |
54 EXCEPTION_MARK; | |
55 | |
56 // create the gc cause jvmstat counters | |
57 _perf_gc_cause = PerfDataManager::create_string_variable(SUN_GC, "cause", | |
58 80, GCCause::to_string(_gc_cause), CHECK); | |
59 | |
60 _perf_gc_lastcause = | |
61 PerfDataManager::create_string_variable(SUN_GC, "lastCause", | |
62 80, GCCause::to_string(_gc_lastcause), CHECK); | |
63 } | |
1166 | 64 _defer_initial_card_mark = false; // strengthened by subclass in pre_initialize() below. |
0 | 65 } |
66 | |
1166 | 67 void CollectedHeap::pre_initialize() { |
68 // Used for ReduceInitialCardMarks (when COMPILER2 is used); | |
69 // otherwise remains unused. | |
1548
15190cbcabe9
6953483: Typo related to ReduceInitialCardMarks leaves concurrent collectors vulnerable to heap corruption
ysr
parents:
1194
diff
changeset
|
70 #ifdef COMPILER2 |
1194
34fb2662f6c2
6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents:
1166
diff
changeset
|
71 _defer_initial_card_mark = ReduceInitialCardMarks && can_elide_tlab_store_barriers() |
34fb2662f6c2
6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents:
1166
diff
changeset
|
72 && (DeferInitialCardMark || card_mark_must_follow_store()); |
1166 | 73 #else |
74 assert(_defer_initial_card_mark == false, "Who would set it?"); | |
75 #endif | |
76 } | |
0 | 77 |
78 #ifndef PRODUCT | |
79 void CollectedHeap::check_for_bad_heap_word_value(HeapWord* addr, size_t size) { | |
80 if (CheckMemoryInitialization && ZapUnusedHeapArea) { | |
81 for (size_t slot = 0; slot < size; slot += 1) { | |
82 assert((*(intptr_t*) (addr + slot)) != ((intptr_t) badHeapWordVal), | |
83 "Found badHeapWordValue in post-allocation check"); | |
84 } | |
85 } | |
86 } | |
87 | |
88 void CollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) | |
89 { | |
90 if (CheckMemoryInitialization && ZapUnusedHeapArea) { | |
91 for (size_t slot = 0; slot < size; slot += 1) { | |
92 assert((*(intptr_t*) (addr + slot)) == ((intptr_t) badHeapWordVal), | |
93 "Found non badHeapWordValue in pre-allocation check"); | |
94 } | |
95 } | |
96 } | |
97 #endif // PRODUCT | |
98 | |
99 #ifdef ASSERT | |
100 void CollectedHeap::check_for_valid_allocation_state() { | |
101 Thread *thread = Thread::current(); | |
102 // How to choose between a pending exception and a potential | |
103 // OutOfMemoryError? Don't allow pending exceptions. | |
104 // This is a VM policy failure, so how do we exhaustively test it? | |
105 assert(!thread->has_pending_exception(), | |
106 "shouldn't be allocating with pending exception"); | |
107 if (StrictSafepointChecks) { | |
108 assert(thread->allow_allocation(), | |
109 "Allocation done by thread for which allocation is blocked " | |
110 "by No_Allocation_Verifier!"); | |
111 // Allocation of an oop can always invoke a safepoint, | |
112 // hence, the true argument | |
113 thread->check_for_valid_safepoint_state(true); | |
114 } | |
115 } | |
116 #endif | |
117 | |
118 HeapWord* CollectedHeap::allocate_from_tlab_slow(Thread* thread, size_t size) { | |
119 | |
120 // Retain tlab and allocate object in shared space if | |
121 // the amount free in the tlab is too large to discard. | |
122 if (thread->tlab().free() > thread->tlab().refill_waste_limit()) { | |
123 thread->tlab().record_slow_allocation(size); | |
124 return NULL; | |
125 } | |
126 | |
127 // Discard tlab and allocate a new one. | |
128 // To minimize fragmentation, the last TLAB may be smaller than the rest. | |
129 size_t new_tlab_size = thread->tlab().compute_size(size); | |
130 | |
131 thread->tlab().clear_before_allocation(); | |
132 | |
133 if (new_tlab_size == 0) { | |
134 return NULL; | |
135 } | |
136 | |
137 // Allocate a new TLAB... | |
138 HeapWord* obj = Universe::heap()->allocate_new_tlab(new_tlab_size); | |
139 if (obj == NULL) { | |
140 return NULL; | |
141 } | |
142 if (ZeroTLAB) { | |
143 // ..and clear it. | |
144 Copy::zero_to_words(obj, new_tlab_size); | |
145 } else { | |
146 // ...and clear just the allocated object. | |
147 Copy::zero_to_words(obj, size); | |
148 } | |
149 thread->tlab().fill(obj, obj + size, new_tlab_size); | |
150 return obj; | |
151 } | |
152 | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
153 void CollectedHeap::flush_deferred_store_barrier(JavaThread* thread) { |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
154 MemRegion deferred = thread->deferred_card_mark(); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
155 if (!deferred.is_empty()) { |
1166 | 156 assert(_defer_initial_card_mark, "Otherwise should be empty"); |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
157 { |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
158 // Verify that the storage points to a parsable object in heap |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
159 DEBUG_ONLY(oop old_obj = oop(deferred.start());) |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
160 assert(is_in(old_obj), "Not in allocated heap"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
161 assert(!can_elide_initializing_store_barrier(old_obj), |
1166 | 162 "Else should have been filtered in new_store_pre_barrier()"); |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
163 assert(!is_in_permanent(old_obj), "Sanity: not expected"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
164 assert(old_obj->is_oop(true), "Not an oop"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
165 assert(old_obj->is_parsable(), "Will not be concurrently parsable"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
166 assert(deferred.word_size() == (size_t)(old_obj->size()), |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
167 "Mismatch: multiple objects?"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
168 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
169 BarrierSet* bs = barrier_set(); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
170 assert(bs->has_write_region_opt(), "No write_region() on BarrierSet"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
171 bs->write_region(deferred); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
172 // "Clear" the deferred_card_mark field |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
173 thread->set_deferred_card_mark(MemRegion()); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
174 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
175 assert(thread->deferred_card_mark().is_empty(), "invariant"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
176 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
177 |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
178 // Helper for ReduceInitialCardMarks. For performance, |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
179 // compiled code may elide card-marks for initializing stores |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
180 // to a newly allocated object along the fast-path. We |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
181 // compensate for such elided card-marks as follows: |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
182 // (a) Generational, non-concurrent collectors, such as |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
183 // GenCollectedHeap(ParNew,DefNew,Tenured) and |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
184 // ParallelScavengeHeap(ParallelGC, ParallelOldGC) |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
185 // need the card-mark if and only if the region is |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
186 // in the old gen, and do not care if the card-mark |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
187 // succeeds or precedes the initializing stores themselves, |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
188 // so long as the card-mark is completed before the next |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
189 // scavenge. For all these cases, we can do a card mark |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
190 // at the point at which we do a slow path allocation |
1166 | 191 // in the old gen, i.e. in this call. |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
192 // (b) GenCollectedHeap(ConcurrentMarkSweepGeneration) requires |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
193 // in addition that the card-mark for an old gen allocated |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
194 // object strictly follow any associated initializing stores. |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
195 // In these cases, the memRegion remembered below is |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
196 // used to card-mark the entire region either just before the next |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
197 // slow-path allocation by this thread or just before the next scavenge or |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
198 // CMS-associated safepoint, whichever of these events happens first. |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
199 // (The implicit assumption is that the object has been fully |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
200 // initialized by this point, a fact that we assert when doing the |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
201 // card-mark.) |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
202 // (c) G1CollectedHeap(G1) uses two kinds of write barriers. When a |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
203 // G1 concurrent marking is in progress an SATB (pre-write-)barrier is |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
204 // is used to remember the pre-value of any store. Initializing |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
205 // stores will not need this barrier, so we need not worry about |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
206 // compensating for the missing pre-barrier here. Turning now |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
207 // to the post-barrier, we note that G1 needs a RS update barrier |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
208 // which simply enqueues a (sequence of) dirty cards which may |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
209 // optionally be refined by the concurrent update threads. Note |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
210 // that this barrier need only be applied to a non-young write, |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
211 // but, like in CMS, because of the presence of concurrent refinement |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
212 // (much like CMS' precleaning), must strictly follow the oop-store. |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
213 // Thus, using the same protocol for maintaining the intended |
1166 | 214 // invariants turns out, serendepitously, to be the same for both |
215 // G1 and CMS. | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
216 // |
1166 | 217 // For any future collector, this code should be reexamined with |
218 // that specific collector in mind, and the documentation above suitably | |
219 // extended and updated. | |
220 oop CollectedHeap::new_store_pre_barrier(JavaThread* thread, oop new_obj) { | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
221 // If a previous card-mark was deferred, flush it now. |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
222 flush_deferred_store_barrier(thread); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
223 if (can_elide_initializing_store_barrier(new_obj)) { |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
224 // The deferred_card_mark region should be empty |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
225 // following the flush above. |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
226 assert(thread->deferred_card_mark().is_empty(), "Error"); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
227 } else { |
1166 | 228 MemRegion mr((HeapWord*)new_obj, new_obj->size()); |
229 assert(!mr.is_empty(), "Error"); | |
230 if (_defer_initial_card_mark) { | |
231 // Defer the card mark | |
232 thread->set_deferred_card_mark(mr); | |
233 } else { | |
234 // Do the card mark | |
235 BarrierSet* bs = barrier_set(); | |
236 assert(bs->has_write_region_opt(), "No write_region() on BarrierSet"); | |
237 bs->write_region(mr); | |
238 } | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
239 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
240 return new_obj; |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
241 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
628
diff
changeset
|
242 |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
243 size_t CollectedHeap::filler_array_hdr_size() { |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1549
diff
changeset
|
244 return size_t(align_object_offset(arrayOopDesc::header_size(T_INT))); // align to Long |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
245 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
246 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
247 size_t CollectedHeap::filler_array_min_size() { |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1549
diff
changeset
|
248 return align_object_size(filler_array_hdr_size()); // align to MinObjAlignment |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
249 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
250 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
251 size_t CollectedHeap::filler_array_max_size() { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
252 return _filler_array_max_size; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
253 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
254 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
255 #ifdef ASSERT |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
256 void CollectedHeap::fill_args_check(HeapWord* start, size_t words) |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
257 { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
258 assert(words >= min_fill_size(), "too small to fill"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
259 assert(words % MinObjAlignment == 0, "unaligned size"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
260 assert(Universe::heap()->is_in_reserved(start), "not in heap"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
261 assert(Universe::heap()->is_in_reserved(start + words - 1), "not in heap"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
262 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
263 |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
264 void CollectedHeap::zap_filler_array(HeapWord* start, size_t words, bool zap) |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
265 { |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
266 if (ZapFillerObjects && zap) { |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
267 Copy::fill_to_words(start + filler_array_hdr_size(), |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
268 words - filler_array_hdr_size(), 0XDEAFBABE); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
269 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
270 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
271 #endif // ASSERT |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
272 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
273 void |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
274 CollectedHeap::fill_with_array(HeapWord* start, size_t words, bool zap) |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
275 { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
276 assert(words >= filler_array_min_size(), "too small for an array"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
277 assert(words <= filler_array_max_size(), "too big for a single object"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
278 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
279 const size_t payload_size = words - filler_array_hdr_size(); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
280 const size_t len = payload_size * HeapWordSize / sizeof(jint); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
281 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
282 // Set the length first for concurrent GC. |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
283 ((arrayOop)start)->set_length((int)len); |
494
d593294016c3
6786195: many nsk.monitoring tests fail with -server -Xcomp
jcoomes
parents:
481
diff
changeset
|
284 post_allocation_setup_common(Universe::intArrayKlassObj(), start, words); |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
285 DEBUG_ONLY(zap_filler_array(start, words, zap);) |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
286 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
287 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
288 void |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
289 CollectedHeap::fill_with_object_impl(HeapWord* start, size_t words, bool zap) |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
290 { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
291 assert(words <= filler_array_max_size(), "too big for a single object"); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
292 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
293 if (words >= filler_array_min_size()) { |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
294 fill_with_array(start, words, zap); |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
295 } else if (words > 0) { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
296 assert(words == min_fill_size(), "unaligned size"); |
1142 | 297 post_allocation_setup_common(SystemDictionary::Object_klass(), start, |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
298 words); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
299 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
300 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
301 |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
302 void CollectedHeap::fill_with_object(HeapWord* start, size_t words, bool zap) |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
303 { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
304 DEBUG_ONLY(fill_args_check(start, words);) |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
305 HandleMark hm; // Free handles before leaving. |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
306 fill_with_object_impl(start, words, zap); |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
307 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
308 |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
309 void CollectedHeap::fill_with_objects(HeapWord* start, size_t words, bool zap) |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
310 { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
311 DEBUG_ONLY(fill_args_check(start, words);) |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
312 HandleMark hm; // Free handles before leaving. |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
313 |
1549
1634cec09505
6953952: collectedHeap.cpp should use #ifdef _LP64 not LP64
ysr
parents:
1548
diff
changeset
|
314 #ifdef _LP64 |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
315 // A single array can fill ~8G, so multiple objects are needed only in 64-bit. |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
316 // First fill with arrays, ensuring that any remaining space is big enough to |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
317 // fill. The remainder is filled with a single object. |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
318 const size_t min = min_fill_size(); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
319 const size_t max = filler_array_max_size(); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
320 while (words > max) { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
321 const size_t cur = words - max >= min ? max : max - min; |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
322 fill_with_array(start, cur, zap); |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
323 start += cur; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
324 words -= cur; |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
325 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
326 #endif |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
327 |
1165
2dd52dea6d28
6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents:
1142
diff
changeset
|
328 fill_with_object_impl(start, words, zap); |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
329 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
356
diff
changeset
|
330 |
0 | 331 HeapWord* CollectedHeap::allocate_new_tlab(size_t size) { |
332 guarantee(false, "thread-local allocation buffers not supported"); | |
333 return NULL; | |
334 } | |
335 | |
336 void CollectedHeap::ensure_parsability(bool retire_tlabs) { | |
337 // The second disjunct in the assertion below makes a concession | |
338 // for the start-up verification done while the VM is being | |
339 // created. Callers be careful that you know that mutators | |
340 // aren't going to interfere -- for instance, this is permissible | |
341 // if we are still single-threaded and have either not yet | |
342 // started allocating (nothing much to verify) or we have | |
343 // started allocating but are now a full-fledged JavaThread | |
344 // (and have thus made our TLAB's) available for filling. | |
345 assert(SafepointSynchronize::is_at_safepoint() || | |
346 !is_init_completed(), | |
347 "Should only be called at a safepoint or at start-up" | |
348 " otherwise concurrent mutator activity may make heap " | |
349 " unparsable again"); | |
1166 | 350 const bool use_tlab = UseTLAB; |
351 const bool deferred = _defer_initial_card_mark; | |
352 // The main thread starts allocating via a TLAB even before it | |
353 // has added itself to the threads list at vm boot-up. | |
354 assert(!use_tlab || Threads::first() != NULL, | |
355 "Attempt to fill tlabs before main thread has been added" | |
356 " to threads list is doomed to failure!"); | |
357 for (JavaThread *thread = Threads::first(); thread; thread = thread->next()) { | |
358 if (use_tlab) thread->tlab().make_parsable(retire_tlabs); | |
359 #ifdef COMPILER2 | |
360 // The deferred store barriers must all have been flushed to the | |
361 // card-table (or other remembered set structure) before GC starts | |
362 // processing the card-table (or other remembered set). | |
363 if (deferred) flush_deferred_store_barrier(thread); | |
364 #else | |
365 assert(!deferred, "Should be false"); | |
366 assert(thread->deferred_card_mark().is_empty(), "Should be empty"); | |
367 #endif | |
0 | 368 } |
369 } | |
370 | |
371 void CollectedHeap::accumulate_statistics_all_tlabs() { | |
372 if (UseTLAB) { | |
373 assert(SafepointSynchronize::is_at_safepoint() || | |
374 !is_init_completed(), | |
375 "should only accumulate statistics on tlabs at safepoint"); | |
376 | |
377 ThreadLocalAllocBuffer::accumulate_statistics_before_gc(); | |
378 } | |
379 } | |
380 | |
381 void CollectedHeap::resize_all_tlabs() { | |
382 if (UseTLAB) { | |
383 assert(SafepointSynchronize::is_at_safepoint() || | |
384 !is_init_completed(), | |
385 "should only resize tlabs at safepoint"); | |
386 | |
387 ThreadLocalAllocBuffer::resize_all_tlabs(); | |
388 } | |
389 } | |
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
390 |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
391 void CollectedHeap::pre_full_gc_dump() { |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
392 if (HeapDumpBeforeFullGC) { |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
393 TraceTime tt("Heap Dump: ", PrintGCDetails, false, gclog_or_tty); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
394 // We are doing a "major" collection and a heap dump before |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
395 // major collection has been requested. |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
396 HeapDumper::dump_heap(); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
397 } |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
398 if (PrintClassHistogramBeforeFullGC) { |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
399 TraceTime tt("Class Histogram: ", PrintGCDetails, true, gclog_or_tty); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
400 VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */, false /* ! prologue */); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
401 inspector.doit(); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
402 } |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
403 } |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
404 |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
405 void CollectedHeap::post_full_gc_dump() { |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
406 if (HeapDumpAfterFullGC) { |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
407 TraceTime tt("Heap Dump", PrintGCDetails, false, gclog_or_tty); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
408 HeapDumper::dump_heap(); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
409 } |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
410 if (PrintClassHistogramAfterFullGC) { |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
411 TraceTime tt("Class Histogram", PrintGCDetails, true, gclog_or_tty); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
412 VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */, false /* ! prologue */); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
413 inspector.doit(); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
414 } |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
494
diff
changeset
|
415 } |