Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psYoungGen.hpp @ 989:148e5441d916
6863023: need non-perm oops in code cache for JSR 292
Summary: Make a special root-list for those few nmethods which might contain non-perm oops.
Reviewed-by: twisti, kvn, never, jmasa, ysr
| author | jrose |
|---|---|
| date | Tue, 15 Sep 2009 21:53:47 -0700 |
| parents | 9ee9cf798b59 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 337 | 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 PSMarkSweepDecorator; | |
| 26 | |
| 27 class PSYoungGen : public CHeapObj { | |
| 28 friend class VMStructs; | |
| 29 friend class ParallelScavengeHeap; | |
| 30 friend class AdjoiningGenerations; | |
| 31 | |
| 32 protected: | |
| 33 MemRegion _reserved; | |
| 34 PSVirtualSpace* _virtual_space; | |
| 35 | |
| 36 // Spaces | |
| 37 MutableSpace* _eden_space; | |
| 38 MutableSpace* _from_space; | |
| 39 MutableSpace* _to_space; | |
| 40 | |
| 41 | |
| 42 // MarkSweep Decorators | |
| 43 PSMarkSweepDecorator* _eden_mark_sweep; | |
| 44 PSMarkSweepDecorator* _from_mark_sweep; | |
| 45 PSMarkSweepDecorator* _to_mark_sweep; | |
| 46 | |
| 47 // Sizing information, in bytes, set in constructor | |
| 48 const size_t _init_gen_size; | |
| 49 const size_t _min_gen_size; | |
| 50 const size_t _max_gen_size; | |
| 51 | |
| 52 // Performance counters | |
| 53 PSGenerationCounters* _gen_counters; | |
| 54 SpaceCounters* _eden_counters; | |
| 55 SpaceCounters* _from_counters; | |
| 56 SpaceCounters* _to_counters; | |
| 57 | |
| 58 // Initialize the space boundaries | |
| 59 void compute_initial_space_boundaries(); | |
| 60 | |
| 61 // Space boundary helper | |
| 62 void set_space_boundaries(size_t eden_size, size_t survivor_size); | |
| 63 | |
| 64 virtual bool resize_generation(size_t eden_size, size_t survivor_size); | |
| 65 virtual void resize_spaces(size_t eden_size, size_t survivor_size); | |
| 66 | |
| 67 // Adjust the spaces to be consistent with the virtual space. | |
| 68 void post_resize(); | |
| 69 | |
| 70 // Return number of bytes that the generation can change. | |
| 71 // These should not be used by PSYoungGen | |
| 72 virtual size_t available_for_expansion(); | |
| 73 virtual size_t available_for_contraction(); | |
| 74 | |
| 75 // Given a desired shrinkage in the size of the young generation, | |
| 76 // return the actual size available for shrinkage. | |
| 77 virtual size_t limit_gen_shrink(size_t desired_change); | |
| 78 // returns the number of bytes available from the current size | |
| 79 // down to the minimum generation size. | |
| 80 size_t available_to_min_gen(); | |
| 81 // Return the number of bytes available for shrinkage considering | |
| 82 // the location the live data in the generation. | |
| 83 virtual size_t available_to_live(); | |
| 84 | |
| 85 public: | |
| 86 // Initialize the generation. | |
| 87 PSYoungGen(size_t initial_byte_size, | |
| 88 size_t minimum_byte_size, | |
| 89 size_t maximum_byte_size); | |
| 90 void initialize_work(); | |
| 91 virtual void initialize(ReservedSpace rs, size_t alignment); | |
| 92 virtual void initialize_virtual_space(ReservedSpace rs, size_t alignment); | |
| 93 | |
| 94 MemRegion reserved() const { return _reserved; } | |
| 95 | |
| 96 bool is_in(const void* p) const { | |
| 97 return _virtual_space->contains((void *)p); | |
| 98 } | |
| 99 | |
| 100 bool is_in_reserved(const void* p) const { | |
| 101 return reserved().contains((void *)p); | |
| 102 } | |
| 103 | |
| 104 MutableSpace* eden_space() const { return _eden_space; } | |
| 105 MutableSpace* from_space() const { return _from_space; } | |
| 106 MutableSpace* to_space() const { return _to_space; } | |
| 107 PSVirtualSpace* virtual_space() const { return _virtual_space; } | |
| 108 | |
| 109 // For Adaptive size policy | |
| 110 size_t min_gen_size() { return _min_gen_size; } | |
| 111 | |
| 112 // MarkSweep support | |
| 113 PSMarkSweepDecorator* eden_mark_sweep() const { return _eden_mark_sweep; } | |
| 114 PSMarkSweepDecorator* from_mark_sweep() const { return _from_mark_sweep; } | |
| 115 PSMarkSweepDecorator* to_mark_sweep() const { return _to_mark_sweep; } | |
| 116 | |
| 117 void precompact(); | |
| 118 void adjust_pointers(); | |
| 119 void compact(); | |
| 120 | |
| 121 // Parallel Old | |
| 122 void move_and_update(ParCompactionManager* cm); | |
| 123 | |
| 124 // Called during/after gc | |
| 125 void swap_spaces(); | |
| 126 | |
| 127 // Resize generation using suggested free space size and survivor size | |
| 128 // NOTE: "eden_size" and "survivor_size" are suggestions only. Current | |
| 129 // heap layout (particularly, live objects in from space) might | |
| 130 // not allow us to use these values. | |
| 131 void resize(size_t eden_size, size_t survivor_size); | |
| 132 | |
| 133 // Size info | |
| 134 size_t capacity_in_bytes() const; | |
| 135 size_t used_in_bytes() const; | |
| 136 size_t free_in_bytes() const; | |
| 137 | |
| 138 size_t capacity_in_words() const; | |
| 139 size_t used_in_words() const; | |
| 140 size_t free_in_words() const; | |
| 141 | |
| 142 // The max this generation can grow to | |
| 143 size_t max_size() const { return _reserved.byte_size(); } | |
| 144 | |
| 145 // The max this generation can grow to if the boundary between | |
| 146 // the generations are allowed to move. | |
| 147 size_t gen_size_limit() const { return _max_gen_size; } | |
| 148 | |
| 149 bool is_maximal_no_gc() const { | |
| 150 return true; // never expands except at a GC | |
| 151 } | |
| 152 | |
| 153 // Allocation | |
| 154 HeapWord* allocate(size_t word_size, bool is_tlab) { | |
| 155 HeapWord* result = eden_space()->cas_allocate(word_size); | |
| 156 return result; | |
| 157 } | |
| 158 | |
| 159 HeapWord** top_addr() const { return eden_space()->top_addr(); } | |
| 160 HeapWord** end_addr() const { return eden_space()->end_addr(); } | |
| 161 | |
| 162 // Iteration. | |
| 163 void oop_iterate(OopClosure* cl); | |
| 164 void object_iterate(ObjectClosure* cl); | |
| 165 | |
| 166 virtual void reset_after_change(); | |
| 167 virtual void reset_survivors_after_shrink(); | |
| 168 | |
| 169 // Performance Counter support | |
| 170 void update_counters(); | |
| 171 | |
| 172 // Debugging - do not use for time critical operations | |
| 173 void print() const; | |
| 174 void print_on(outputStream* st) const; | |
| 175 void print_used_change(size_t prev_used) const; | |
| 176 virtual const char* name() const { return "PSYoungGen"; } | |
| 177 | |
| 178 void verify(bool allow_dirty); | |
| 179 | |
| 180 // Space boundary invariant checker | |
| 181 void space_invariants() PRODUCT_RETURN; | |
|
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182 |
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183 // Helper for mangling survivor spaces. |
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184 void mangle_survivors(MutableSpace* s1, |
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185 MemRegion s1MR, |
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186 MutableSpace* s2, |
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187 MemRegion s2MR) PRODUCT_RETURN; |
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188 |
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189 void record_spaces_top() PRODUCT_RETURN; |
| 0 | 190 }; |