Mercurial > hg > graal-compiler
annotate src/share/vm/memory/heapInspection.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | d2a62e0f25eb |
| children | fb19af007ffc |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2002, 2012, 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_MEMORY_HEAPINSPECTION_HPP |
| 26 #define SHARE_VM_MEMORY_HEAPINSPECTION_HPP | |
| 27 | |
| 28 #include "memory/allocation.inline.hpp" | |
| 29 #include "oops/oop.inline.hpp" | |
| 30 | |
| 0 | 31 #ifndef SERVICES_KERNEL |
| 32 | |
| 33 | |
| 34 // HeapInspection | |
| 35 | |
| 36 // KlassInfoTable is a bucket hash table that | |
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37 // maps Klass*s to extra information: |
| 0 | 38 // instance count and instance word size. |
| 39 // | |
| 40 // A KlassInfoBucket is the head of a link list | |
| 41 // of KlassInfoEntry's | |
| 42 // | |
| 43 // KlassInfoHisto is a growable array of pointers | |
| 44 // to KlassInfoEntry's and is used to sort | |
| 45 // the entries. | |
| 46 | |
| 6197 | 47 class KlassInfoEntry: public CHeapObj<mtInternal> { |
| 0 | 48 private: |
| 49 KlassInfoEntry* _next; | |
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50 Klass* _klass; |
| 0 | 51 long _instance_count; |
| 52 size_t _instance_words; | |
| 53 | |
| 54 public: | |
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55 KlassInfoEntry(Klass* k, KlassInfoEntry* next) : |
| 0 | 56 _klass(k), _instance_count(0), _instance_words(0), _next(next) |
| 57 {} | |
| 58 KlassInfoEntry* next() { return _next; } | |
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59 bool is_equal(Klass* k) { return k == _klass; } |
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60 Klass* klass() { return _klass; } |
| 0 | 61 long count() { return _instance_count; } |
| 62 void set_count(long ct) { _instance_count = ct; } | |
| 63 size_t words() { return _instance_words; } | |
| 64 void set_words(size_t wds) { _instance_words = wds; } | |
| 65 int compare(KlassInfoEntry* e1, KlassInfoEntry* e2); | |
| 66 void print_on(outputStream* st) const; | |
| 67 }; | |
| 68 | |
| 69 class KlassInfoClosure: public StackObj { | |
| 70 public: | |
| 71 // Called for each KlassInfoEntry. | |
| 72 virtual void do_cinfo(KlassInfoEntry* cie) = 0; | |
| 73 }; | |
| 74 | |
| 6197 | 75 class KlassInfoBucket: public CHeapObj<mtInternal> { |
| 0 | 76 private: |
| 77 KlassInfoEntry* _list; | |
| 78 KlassInfoEntry* list() { return _list; } | |
| 79 void set_list(KlassInfoEntry* l) { _list = l; } | |
| 80 public: | |
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81 KlassInfoEntry* lookup(Klass* const k); |
| 0 | 82 void initialize() { _list = NULL; } |
| 83 void empty(); | |
| 84 void iterate(KlassInfoClosure* cic); | |
| 85 }; | |
| 86 | |
| 87 class KlassInfoTable: public StackObj { | |
| 88 private: | |
| 89 int _size; | |
| 90 | |
| 91 // An aligned reference address (typically the least | |
| 92 // address in the perm gen) used for hashing klass | |
| 93 // objects. | |
| 94 HeapWord* _ref; | |
| 95 | |
| 96 KlassInfoBucket* _buckets; | |
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97 uint hash(Klass* p); |
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98 KlassInfoEntry* lookup(Klass* const k); |
| 0 | 99 |
| 100 public: | |
| 101 // Table size | |
| 102 enum { | |
| 103 cit_size = 20011 | |
| 104 }; | |
| 105 KlassInfoTable(int size, HeapWord* ref); | |
| 106 ~KlassInfoTable(); | |
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107 bool record_instance(const oop obj); |
| 0 | 108 void iterate(KlassInfoClosure* cic); |
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109 bool allocation_failed() { return _buckets == NULL; } |
| 0 | 110 }; |
| 111 | |
| 112 class KlassInfoHisto : public StackObj { | |
| 113 private: | |
| 114 GrowableArray<KlassInfoEntry*>* _elements; | |
| 115 GrowableArray<KlassInfoEntry*>* elements() const { return _elements; } | |
| 116 const char* _title; | |
| 117 const char* title() const { return _title; } | |
| 118 static int sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2); | |
| 119 void print_elements(outputStream* st) const; | |
| 120 public: | |
| 121 enum { | |
| 122 histo_initial_size = 1000 | |
| 123 }; | |
| 124 KlassInfoHisto(const char* title, | |
| 125 int estimatedCount); | |
| 126 ~KlassInfoHisto(); | |
| 127 void add(KlassInfoEntry* cie); | |
| 128 void print_on(outputStream* st) const; | |
| 129 void sort(); | |
| 130 }; | |
| 131 | |
| 132 #endif // SERVICES_KERNEL | |
| 133 | |
| 134 class HeapInspection : public AllStatic { | |
| 135 public: | |
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136 static void heap_inspection(outputStream* st, bool need_prologue) KERNEL_RETURN; |
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137 static void find_instances_at_safepoint(Klass* k, GrowableArray<oop>* result) KERNEL_RETURN; |
| 0 | 138 }; |
| 1972 | 139 |
| 140 #endif // SHARE_VM_MEMORY_HEAPINSPECTION_HPP |