Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp @ 542:9a25e0c45327
6792421: assert(_bitMap->isMarked(addr+size-1),inconsistent Printezis mark)
Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition.
Reviewed-by: ysr, tonyp
author | jmasa |
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date | Sat, 31 Jan 2009 00:15:00 -0800 |
parents | e9be0e04635a |
children | 0fbdb4381b99 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 class AdjoiningGenerations; | |
26 class GCTaskManager; | |
27 class PSAdaptiveSizePolicy; | |
28 | |
29 class ParallelScavengeHeap : public CollectedHeap { | |
30 friend class VMStructs; | |
31 private: | |
32 static PSYoungGen* _young_gen; | |
33 static PSOldGen* _old_gen; | |
34 static PSPermGen* _perm_gen; | |
35 | |
36 // Sizing policy for entire heap | |
37 static PSAdaptiveSizePolicy* _size_policy; | |
38 static PSGCAdaptivePolicyCounters* _gc_policy_counters; | |
39 | |
40 static ParallelScavengeHeap* _psh; | |
41 | |
42 size_t _perm_gen_alignment; | |
43 size_t _young_gen_alignment; | |
44 size_t _old_gen_alignment; | |
45 | |
46 inline size_t set_alignment(size_t& var, size_t val); | |
47 | |
48 // Collection of generations that are adjacent in the | |
49 // space reserved for the heap. | |
50 AdjoiningGenerations* _gens; | |
51 | |
52 static GCTaskManager* _gc_task_manager; // The task manager. | |
53 | |
54 protected: | |
55 static inline size_t total_invocations(); | |
56 HeapWord* allocate_new_tlab(size_t size); | |
57 void fill_all_tlabs(bool retire); | |
58 | |
59 public: | |
60 ParallelScavengeHeap() : CollectedHeap() { | |
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61 set_alignment(_perm_gen_alignment, intra_heap_alignment()); |
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62 set_alignment(_young_gen_alignment, intra_heap_alignment()); |
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63 set_alignment(_old_gen_alignment, intra_heap_alignment()); |
0 | 64 } |
65 | |
66 // For use by VM operations | |
67 enum CollectionType { | |
68 Scavenge, | |
69 MarkSweep | |
70 }; | |
71 | |
72 ParallelScavengeHeap::Name kind() const { | |
73 return CollectedHeap::ParallelScavengeHeap; | |
74 } | |
75 | |
76 static PSYoungGen* young_gen() { return _young_gen; } | |
77 static PSOldGen* old_gen() { return _old_gen; } | |
78 static PSPermGen* perm_gen() { return _perm_gen; } | |
79 | |
80 virtual PSAdaptiveSizePolicy* size_policy() { return _size_policy; } | |
81 | |
82 static PSGCAdaptivePolicyCounters* gc_policy_counters() { return _gc_policy_counters; } | |
83 | |
84 static ParallelScavengeHeap* heap(); | |
85 | |
86 static GCTaskManager* const gc_task_manager() { return _gc_task_manager; } | |
87 | |
88 AdjoiningGenerations* gens() { return _gens; } | |
89 | |
90 // Returns JNI_OK on success | |
91 virtual jint initialize(); | |
92 | |
93 void post_initialize(); | |
94 void update_counters(); | |
95 // The alignment used for the various generations. | |
96 size_t perm_gen_alignment() const { return _perm_gen_alignment; } | |
97 size_t young_gen_alignment() const { return _young_gen_alignment; } | |
98 size_t old_gen_alignment() const { return _old_gen_alignment; } | |
99 | |
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100 // The alignment used for eden and survivors within the young gen |
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101 // and for boundary between young gen and old gen. |
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102 size_t intra_heap_alignment() const { return 64 * K; } |
0 | 103 |
104 size_t capacity() const; | |
105 size_t used() const; | |
106 | |
107 // Return "true" if all generations (but perm) have reached the | |
108 // maximal committed limit that they can reach, without a garbage | |
109 // collection. | |
110 virtual bool is_maximal_no_gc() const; | |
111 | |
112 // Does this heap support heap inspection? (+PrintClassHistogram) | |
113 bool supports_heap_inspection() const { return true; } | |
114 | |
115 size_t permanent_capacity() const; | |
116 size_t permanent_used() const; | |
117 | |
118 size_t max_capacity() const; | |
119 | |
120 // Whether p is in the allocated part of the heap | |
121 bool is_in(const void* p) const; | |
122 | |
123 bool is_in_reserved(const void* p) const; | |
124 bool is_in_permanent(const void *p) const { // reserved part | |
125 return perm_gen()->reserved().contains(p); | |
126 } | |
127 | |
128 bool is_permanent(const void *p) const { // committed part | |
129 return perm_gen()->is_in(p); | |
130 } | |
131 | |
132 static bool is_in_young(oop *p); // reserved part | |
133 static bool is_in_old_or_perm(oop *p); // reserved part | |
134 | |
135 // Memory allocation. "gc_time_limit_was_exceeded" will | |
136 // be set to true if the adaptive size policy determine that | |
137 // an excessive amount of time is being spent doing collections | |
138 // and caused a NULL to be returned. If a NULL is not returned, | |
139 // "gc_time_limit_was_exceeded" has an undefined meaning. | |
140 | |
141 HeapWord* mem_allocate(size_t size, | |
142 bool is_noref, | |
143 bool is_tlab, | |
144 bool* gc_overhead_limit_was_exceeded); | |
145 HeapWord* failed_mem_allocate(size_t size, bool is_tlab); | |
146 | |
147 HeapWord* permanent_mem_allocate(size_t size); | |
148 HeapWord* failed_permanent_mem_allocate(size_t size); | |
149 | |
150 // Support for System.gc() | |
151 void collect(GCCause::Cause cause); | |
152 | |
153 // This interface assumes that it's being called by the | |
154 // vm thread. It collects the heap assuming that the | |
155 // heap lock is already held and that we are executing in | |
156 // the context of the vm thread. | |
157 void collect_as_vm_thread(GCCause::Cause cause); | |
158 | |
159 // These also should be called by the vm thread at a safepoint (e.g., from a | |
160 // VM operation). | |
161 // | |
162 // The first collects the young generation only, unless the scavenge fails; it | |
163 // will then attempt a full gc. The second collects the entire heap; if | |
164 // maximum_compaction is true, it will compact everything and clear all soft | |
165 // references. | |
166 inline void invoke_scavenge(); | |
167 inline void invoke_full_gc(bool maximum_compaction); | |
168 | |
169 size_t large_typearray_limit() { return FastAllocateSizeLimit; } | |
170 | |
171 bool supports_inline_contig_alloc() const { return !UseNUMA; } | |
141 | 172 |
173 HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; } | |
174 HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; } | |
0 | 175 |
176 void ensure_parsability(bool retire_tlabs); | |
177 void accumulate_statistics_all_tlabs(); | |
178 void resize_all_tlabs(); | |
179 | |
180 size_t unsafe_max_alloc(); | |
181 | |
182 bool supports_tlab_allocation() const { return true; } | |
183 | |
184 size_t tlab_capacity(Thread* thr) const; | |
185 size_t unsafe_max_tlab_alloc(Thread* thr) const; | |
186 | |
342
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187 // Can a compiler initialize a new object without store barriers? |
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188 // This permission only extends from the creation of a new object |
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189 // via a TLAB up to the first subsequent safepoint. |
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190 virtual bool can_elide_tlab_store_barriers() const { |
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191 return true; |
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192 } |
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193 |
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194 // Can a compiler elide a store barrier when it writes |
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195 // a permanent oop into the heap? Applies when the compiler |
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196 // is storing x to the heap, where x->is_perm() is true. |
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197 virtual bool can_elide_permanent_oop_store_barriers() const { |
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198 return true; |
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199 } |
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200 |
0 | 201 void oop_iterate(OopClosure* cl); |
202 void object_iterate(ObjectClosure* cl); | |
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203 void safe_object_iterate(ObjectClosure* cl) { object_iterate(cl); } |
0 | 204 void permanent_oop_iterate(OopClosure* cl); |
205 void permanent_object_iterate(ObjectClosure* cl); | |
206 | |
207 HeapWord* block_start(const void* addr) const; | |
208 size_t block_size(const HeapWord* addr) const; | |
209 bool block_is_obj(const HeapWord* addr) const; | |
210 | |
211 jlong millis_since_last_gc(); | |
212 | |
213 void prepare_for_verify(); | |
214 void print() const; | |
215 void print_on(outputStream* st) const; | |
216 virtual void print_gc_threads_on(outputStream* st) const; | |
217 virtual void gc_threads_do(ThreadClosure* tc) const; | |
218 virtual void print_tracing_info() const; | |
219 | |
220 void verify(bool allow_dirty, bool silent); | |
221 | |
222 void print_heap_change(size_t prev_used); | |
223 | |
224 // Resize the young generation. The reserved space for the | |
225 // generation may be expanded in preparation for the resize. | |
226 void resize_young_gen(size_t eden_size, size_t survivor_size); | |
227 | |
228 // Resize the old generation. The reserved space for the | |
229 // generation may be expanded in preparation for the resize. | |
230 void resize_old_gen(size_t desired_free_space); | |
263
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231 |
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232 // Save the tops of the spaces in all generations |
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233 void record_gen_tops_before_GC() PRODUCT_RETURN; |
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234 |
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235 // Mangle the unused parts of all spaces in the heap |
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236 void gen_mangle_unused_area() PRODUCT_RETURN; |
0 | 237 }; |
238 | |
239 inline size_t ParallelScavengeHeap::set_alignment(size_t& var, size_t val) | |
240 { | |
241 assert(is_power_of_2((intptr_t)val), "must be a power of 2"); | |
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242 var = round_to(val, intra_heap_alignment()); |
0 | 243 return var; |
244 } |