Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/metachunk.hpp @ 10241:d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
Summary: Make processing of minimum, initial and maximum heap size more intiutive by removing previous limitations on allowed values, and make error reporting consistent. Further, fix errors in ergonomic heap sizing.
Reviewed-by: johnc, jwilhelm, tamao
| author | tschatzl |
|---|---|
| date | Mon, 06 May 2013 17:19:42 +0200 |
| parents | c23dbf0e8ab7 |
| children | bdfbb1fb19ca |
| 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 | |
| 10175 | 44 class VirtualSpaceNode; |
| 45 | |
| 6885 | 46 class Metachunk VALUE_OBJ_CLASS_SPEC { |
| 47 // link to support lists of chunks | |
| 48 Metachunk* _next; | |
| 49 Metachunk* _prev; | |
| 10175 | 50 VirtualSpaceNode* _container; |
| 6885 | 51 |
| 52 MetaWord* _bottom; | |
| 53 MetaWord* _end; | |
| 54 MetaWord* _top; | |
| 55 size_t _word_size; | |
| 56 // Used in a guarantee() so included in the Product builds | |
| 57 // even through it is only for debugging. | |
| 58 bool _is_free; | |
| 59 | |
| 60 // Metachunks are allocated out of a MetadataVirtualSpace and | |
| 61 // and use some of its space to describe itself (plus alignment | |
| 62 // considerations). Metadata is allocated in the rest of the chunk. | |
| 63 // This size is the overhead of maintaining the Metachunk within | |
| 64 // the space. | |
| 65 static size_t _overhead; | |
| 66 | |
| 67 public: | |
| 10175 | 68 Metachunk(size_t word_size , VirtualSpaceNode* container); |
| 6885 | 69 |
| 70 // Used to add a Metachunk to a list of Metachunks | |
| 71 void set_next(Metachunk* v) { _next = v; assert(v != this, "Boom");} | |
| 72 void set_prev(Metachunk* v) { _prev = v; assert(v != this, "Boom");} | |
| 10175 | 73 void set_container(VirtualSpaceNode* v) { _container = v; } |
| 6885 | 74 |
| 75 MetaWord* allocate(size_t word_size); | |
| 76 | |
| 77 // Accessors | |
| 78 Metachunk* next() const { return _next; } | |
| 79 Metachunk* prev() const { return _prev; } | |
| 10175 | 80 VirtualSpaceNode* container() const { return _container; } |
| 6885 | 81 MetaWord* bottom() const { return _bottom; } |
| 82 MetaWord* end() const { return _end; } | |
| 83 MetaWord* top() const { return _top; } | |
| 84 size_t word_size() const { return _word_size; } | |
| 85 size_t size() const volatile { return _word_size; } | |
| 86 void set_size(size_t v) { _word_size = v; } | |
| 87 bool is_free() { return _is_free; } | |
| 88 void set_is_free(bool v) { _is_free = v; } | |
| 89 static size_t overhead() { return _overhead; } | |
| 90 void clear_next() { set_next(NULL); } | |
| 91 void link_prev(Metachunk* ptr) { set_prev(ptr); } | |
| 92 uintptr_t* end() { return ((uintptr_t*) this) + size(); } | |
| 93 bool cantCoalesce() const { return false; } | |
| 94 void link_next(Metachunk* ptr) { set_next(ptr); } | |
| 95 void link_after(Metachunk* ptr){ | |
| 96 link_next(ptr); | |
| 97 if (ptr != NULL) ptr->link_prev(this); | |
| 98 } | |
| 99 | |
| 100 // Reset top to bottom so chunk can be reused. | |
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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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101 void reset_empty() { _top = (_bottom + _overhead); _next = NULL; _prev = NULL; } |
| 6885 | 102 bool is_empty() { return _top == (_bottom + _overhead); } |
| 103 | |
| 104 // used (has been allocated) | |
| 105 // free (available for future allocations) | |
| 106 // capacity (total size of chunk) | |
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7185
diff
changeset
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107 size_t used_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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108 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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109 size_t capacity_word_size()const; |
| 6885 | 110 |
| 111 // Debug support | |
| 112 #ifdef ASSERT | |
| 113 void* prev_addr() const { return (void*)&_prev; } | |
| 114 void* next_addr() const { return (void*)&_next; } | |
| 115 void* size_addr() const { return (void*)&_word_size; } | |
| 116 #endif | |
| 117 bool verify_chunk_in_free_list(Metachunk* tc) const { return true; } | |
| 118 bool verify_par_locked() { return true; } | |
| 119 | |
| 120 void assert_is_mangled() const {/* Don't check "\*/} | |
| 121 | |
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90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6885
diff
changeset
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122 NOT_PRODUCT(void mangle();) |
| 6885 | 123 |
| 124 void print_on(outputStream* st) const; | |
| 125 void verify(); | |
| 126 }; | |
| 127 #endif // SHARE_VM_MEMORY_METACHUNK_HPP |