Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/metachunk.hpp @ 8804:91bf0bdae37b
8008217: CDS: Class data sharing limits the malloc heap on Solaris
Summary: In 64bit VM move CDS archive address to 32G on all platforms using new flag SharedBaseAddress. In 32bit VM set CDS archive address to 3Gb on Linux and let other OSs pick the address.
Reviewed-by: kvn, dcubed, zgu, hseigel
| author | coleenp |
|---|---|
| date | Wed, 20 Mar 2013 08:04:54 -0400 |
| parents | e51c9860cf66 |
| children | c23dbf0e8ab7 |
| rev | line source |
|---|---|
| 6885 | 1 /* |
| 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. | |
| 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 #ifndef SHARE_VM_MEMORY_METACHUNK_HPP | |
| 25 #define SHARE_VM_MEMORY_METACHUNK_HPP | |
| 26 | |
| 27 // Metachunk - Quantum of allocation from a Virtualspace | |
| 28 // Metachunks are reused (when freed are put on a global freelist) and | |
| 29 // have no permanent association to a SpaceManager. | |
| 30 | |
| 31 // +--------------+ <- end | |
| 32 // | | --+ ---+ | |
| 33 // | | | free | | |
| 34 // | | | | | |
| 35 // | | | | capacity | |
| 36 // | | | | | |
| 37 // | | <- top --+ | | |
| 38 // | | ---+ | | |
| 39 // | | | used | | |
| 40 // | | | | | |
| 41 // | | | | | |
| 42 // +--------------+ <- bottom ---+ ---+ | |
| 43 | |
| 44 class Metachunk VALUE_OBJ_CLASS_SPEC { | |
| 45 // link to support lists of chunks | |
| 46 Metachunk* _next; | |
| 47 Metachunk* _prev; | |
| 48 | |
| 49 MetaWord* _bottom; | |
| 50 MetaWord* _end; | |
| 51 MetaWord* _top; | |
| 52 size_t _word_size; | |
| 53 // Used in a guarantee() so included in the Product builds | |
| 54 // even through it is only for debugging. | |
| 55 bool _is_free; | |
| 56 | |
| 57 // Metachunks are allocated out of a MetadataVirtualSpace and | |
| 58 // and use some of its space to describe itself (plus alignment | |
| 59 // considerations). Metadata is allocated in the rest of the chunk. | |
| 60 // This size is the overhead of maintaining the Metachunk within | |
| 61 // the space. | |
| 62 static size_t _overhead; | |
| 63 | |
| 64 void set_bottom(MetaWord* v) { _bottom = v; } | |
| 65 void set_end(MetaWord* v) { _end = v; } | |
| 66 void set_top(MetaWord* v) { _top = v; } | |
| 67 void set_word_size(size_t v) { _word_size = v; } | |
| 68 public: | |
| 69 #ifdef ASSERT | |
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70 Metachunk() : _bottom(NULL), _end(NULL), _top(NULL), _is_free(false), |
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71 _next(NULL), _prev(NULL) {} |
| 6885 | 72 #else |
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73 Metachunk() : _bottom(NULL), _end(NULL), _top(NULL), |
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74 _next(NULL), _prev(NULL) {} |
| 6885 | 75 #endif |
| 76 | |
| 77 // Used to add a Metachunk to a list of Metachunks | |
| 78 void set_next(Metachunk* v) { _next = v; assert(v != this, "Boom");} | |
| 79 void set_prev(Metachunk* v) { _prev = v; assert(v != this, "Boom");} | |
| 80 | |
| 81 MetaWord* allocate(size_t word_size); | |
| 82 static Metachunk* initialize(MetaWord* ptr, size_t word_size); | |
| 83 | |
| 84 // Accessors | |
| 85 Metachunk* next() const { return _next; } | |
| 86 Metachunk* prev() const { return _prev; } | |
| 87 MetaWord* bottom() const { return _bottom; } | |
| 88 MetaWord* end() const { return _end; } | |
| 89 MetaWord* top() const { return _top; } | |
| 90 size_t word_size() const { return _word_size; } | |
| 91 size_t size() const volatile { return _word_size; } | |
| 92 void set_size(size_t v) { _word_size = v; } | |
| 93 bool is_free() { return _is_free; } | |
| 94 void set_is_free(bool v) { _is_free = v; } | |
| 95 static size_t overhead() { return _overhead; } | |
| 96 void clear_next() { set_next(NULL); } | |
| 97 void link_prev(Metachunk* ptr) { set_prev(ptr); } | |
| 98 uintptr_t* end() { return ((uintptr_t*) this) + size(); } | |
| 99 bool cantCoalesce() const { return false; } | |
| 100 void link_next(Metachunk* ptr) { set_next(ptr); } | |
| 101 void link_after(Metachunk* ptr){ | |
| 102 link_next(ptr); | |
| 103 if (ptr != NULL) ptr->link_prev(this); | |
| 104 } | |
| 105 | |
| 106 // Reset top to bottom so chunk can be reused. | |
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107 void reset_empty() { _top = (_bottom + _overhead); _next = NULL; _prev = NULL; } |
| 6885 | 108 bool is_empty() { return _top == (_bottom + _overhead); } |
| 109 | |
| 110 // used (has been allocated) | |
| 111 // free (available for future allocations) | |
| 112 // capacity (total size of chunk) | |
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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113 size_t used_word_size() const; |
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
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114 size_t free_word_size() const; |
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e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7185
diff
changeset
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115 size_t capacity_word_size()const; |
| 6885 | 116 |
| 117 // Debug support | |
| 118 #ifdef ASSERT | |
| 119 void* prev_addr() const { return (void*)&_prev; } | |
| 120 void* next_addr() const { return (void*)&_next; } | |
| 121 void* size_addr() const { return (void*)&_word_size; } | |
| 122 #endif | |
| 123 bool verify_chunk_in_free_list(Metachunk* tc) const { return true; } | |
| 124 bool verify_par_locked() { return true; } | |
| 125 | |
| 126 void assert_is_mangled() const {/* Don't check "\*/} | |
| 127 | |
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90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
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128 NOT_PRODUCT(void mangle();) |
| 6885 | 129 |
| 130 void print_on(outputStream* st) const; | |
| 131 void verify(); | |
| 132 }; | |
| 133 #endif // SHARE_VM_MEMORY_METACHUNK_HPP |