Mercurial > hg > truffle
annotate src/share/vm/memory/allocation.cpp @ 11341:ca5054bbfcdd
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Aug 2013 03:55:16 +0200 |
parents | cf9d71d3e474 |
children | 9758d9f36299 bdd155477289 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 #include "precompiled.hpp" |
26 #include "memory/allocation.hpp" | |
27 #include "memory/allocation.inline.hpp" | |
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28 #include "memory/genCollectedHeap.hpp" |
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29 #include "memory/metaspaceShared.hpp" |
1972 | 30 #include "memory/resourceArea.hpp" |
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31 #include "memory/universe.hpp" |
6197 | 32 #include "runtime/atomic.hpp" |
1972 | 33 #include "runtime/os.hpp" |
34 #include "runtime/task.hpp" | |
35 #include "runtime/threadCritical.hpp" | |
6197 | 36 #include "services/memTracker.hpp" |
1972 | 37 #include "utilities/ostream.hpp" |
6197 | 38 |
1972 | 39 #ifdef TARGET_OS_FAMILY_linux |
40 # include "os_linux.inline.hpp" | |
41 #endif | |
42 #ifdef TARGET_OS_FAMILY_solaris | |
43 # include "os_solaris.inline.hpp" | |
44 #endif | |
45 #ifdef TARGET_OS_FAMILY_windows | |
46 # include "os_windows.inline.hpp" | |
47 #endif | |
3960 | 48 #ifdef TARGET_OS_FAMILY_bsd |
49 # include "os_bsd.inline.hpp" | |
50 #endif | |
0 | 51 |
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52 void* StackObj::operator new(size_t size) { ShouldNotCallThis(); return 0; } |
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53 void StackObj::operator delete(void* p) { ShouldNotCallThis(); } |
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54 void* StackObj::operator new [](size_t size) { ShouldNotCallThis(); return 0; } |
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55 void StackObj::operator delete [](void* p) { ShouldNotCallThis(); } |
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56 |
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57 void* _ValueObj::operator new(size_t size) { ShouldNotCallThis(); return 0; } |
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58 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); } |
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59 void* _ValueObj::operator new [](size_t size) { ShouldNotCallThis(); return 0; } |
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60 void _ValueObj::operator delete [](void* p) { ShouldNotCallThis(); } |
0 | 61 |
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62 void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data, |
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63 size_t word_size, bool read_only, |
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64 MetaspaceObj::Type type, TRAPS) { |
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65 // Klass has it's own operator new |
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66 return Metaspace::allocate(loader_data, word_size, read_only, |
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67 type, CHECK_NULL); |
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68 } |
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69 |
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70 bool MetaspaceObj::is_shared() const { |
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71 return MetaspaceShared::is_in_shared_space(this); |
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72 } |
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73 |
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74 |
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75 bool MetaspaceObj::is_metaspace_object() const { |
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76 return Metaspace::contains((void*)this); |
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77 } |
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78 |
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79 void MetaspaceObj::print_address_on(outputStream* st) const { |
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80 st->print(" {"INTPTR_FORMAT"}", this); |
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81 } |
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82 |
6197 | 83 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) { |
0 | 84 address res; |
85 switch (type) { | |
86 case C_HEAP: | |
6197 | 87 res = (address)AllocateHeap(size, flags, CALLER_PC); |
1685 | 88 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
0 | 89 break; |
90 case RESOURCE_AREA: | |
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91 // new(size) sets allocation type RESOURCE_AREA. |
0 | 92 res = (address)operator new(size); |
93 break; | |
94 default: | |
95 ShouldNotReachHere(); | |
96 } | |
97 return res; | |
98 } | |
99 | |
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100 void* ResourceObj::operator new [](size_t size, allocation_type type, MEMFLAGS flags) { |
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101 return (address) operator new(size, type, flags); |
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102 } |
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103 |
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104 void* ResourceObj::operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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105 allocation_type type, MEMFLAGS flags) { |
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106 //should only call this with std::nothrow, use other operator new() otherwise |
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107 address res; |
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108 switch (type) { |
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109 case C_HEAP: |
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110 res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL); |
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111 DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);) |
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112 break; |
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113 case RESOURCE_AREA: |
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114 // new(size) sets allocation type RESOURCE_AREA. |
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115 res = (address)operator new(size, std::nothrow); |
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116 break; |
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117 default: |
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118 ShouldNotReachHere(); |
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119 } |
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120 return res; |
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121 } |
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122 |
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123 void* ResourceObj::operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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124 allocation_type type, MEMFLAGS flags) { |
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125 return (address)operator new(size, nothrow_constant, type, flags); |
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126 } |
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127 |
0 | 128 void ResourceObj::operator delete(void* p) { |
129 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
130 "delete only allowed for C_HEAP objects"); | |
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131 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
0 | 132 FreeHeap(p); |
133 } | |
134 | |
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135 void ResourceObj::operator delete [](void* p) { |
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136 operator delete(p); |
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137 } |
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138 |
1685 | 139 #ifdef ASSERT |
140 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
141 // Set allocation type in the resource object | |
142 uintptr_t allocation = (uintptr_t)res; | |
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143 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least"); |
1685 | 144 assert(type <= allocation_mask, "incorrect allocation type"); |
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145 ResourceObj* resobj = (ResourceObj *)res; |
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146 resobj->_allocation_t[0] = ~(allocation + type); |
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147 if (type != STACK_OR_EMBEDDED) { |
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148 // Called from operator new() and CollectionSetChooser(), |
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149 // set verification value. |
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150 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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151 } |
1685 | 152 } |
153 | |
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154 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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155 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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156 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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157 } |
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158 |
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159 bool ResourceObj::is_type_set() const { |
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160 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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161 return get_allocation_type() == type && |
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162 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
1685 | 163 } |
164 | |
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165 ResourceObj::ResourceObj() { // default constructor |
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166 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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167 // Operator new() is not called for allocations |
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168 // on stack and for embedded objects. |
1685 | 169 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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170 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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171 // For some reason we got a value which resembles |
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172 // an embedded or stack object (operator new() does not |
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173 // set such type). Keep it since it is valid value |
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174 // (even if it was garbage). |
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175 // Ignore garbage in other fields. |
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176 } else if (is_type_set()) { |
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177 // Operator new() was called and type was set. |
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178 assert(!allocated_on_stack(), |
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179 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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180 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
1685 | 181 } else { |
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182 // Operator new() was not called. |
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183 // Assume that it is embedded or stack object. |
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184 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
1685 | 185 } |
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186 _allocation_t[1] = 0; // Zap verification value |
1685 | 187 } |
188 | |
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189 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
1685 | 190 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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191 // Note: garbage may resembles valid value. |
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192 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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193 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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194 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
1685 | 195 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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196 _allocation_t[1] = 0; // Zap verification value |
1685 | 197 } |
198 | |
199 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
200 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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201 assert(allocated_on_stack(), |
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202 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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203 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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204 // Keep current _allocation_t value; |
1685 | 205 return *this; |
206 } | |
207 | |
208 ResourceObj::~ResourceObj() { | |
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209 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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210 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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211 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
1685 | 212 } |
213 } | |
214 #endif // ASSERT | |
215 | |
216 | |
0 | 217 void trace_heap_malloc(size_t size, const char* name, void* p) { |
218 // A lock is not needed here - tty uses a lock internally | |
2250 | 219 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p, size, name == NULL ? "" : name); |
0 | 220 } |
221 | |
222 | |
223 void trace_heap_free(void* p) { | |
224 // A lock is not needed here - tty uses a lock internally | |
225 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
226 } | |
227 | |
228 //-------------------------------------------------------------------------------------- | |
229 // ChunkPool implementation | |
230 | |
231 // MT-safe pool of chunks to reduce malloc/free thrashing | |
232 // NB: not using Mutex because pools are used before Threads are initialized | |
6197 | 233 class ChunkPool: public CHeapObj<mtInternal> { |
0 | 234 Chunk* _first; // first cached Chunk; its first word points to next chunk |
235 size_t _num_chunks; // number of unused chunks in pool | |
236 size_t _num_used; // number of chunks currently checked out | |
237 const size_t _size; // size of each chunk (must be uniform) | |
238 | |
11095 | 239 // Our four static pools |
0 | 240 static ChunkPool* _large_pool; |
241 static ChunkPool* _medium_pool; | |
242 static ChunkPool* _small_pool; | |
11095 | 243 static ChunkPool* _tiny_pool; |
0 | 244 |
245 // return first element or null | |
246 void* get_first() { | |
247 Chunk* c = _first; | |
248 if (_first) { | |
249 _first = _first->next(); | |
250 _num_chunks--; | |
251 } | |
252 return c; | |
253 } | |
254 | |
255 public: | |
256 // All chunks in a ChunkPool has the same size | |
257 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
258 | |
259 // Allocate a new chunk from the pool (might expand the pool) | |
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260 _NOINLINE_ void* allocate(size_t bytes, AllocFailType alloc_failmode) { |
0 | 261 assert(bytes == _size, "bad size"); |
262 void* p = NULL; | |
6197 | 263 // No VM lock can be taken inside ThreadCritical lock, so os::malloc |
264 // should be done outside ThreadCritical lock due to NMT | |
0 | 265 { ThreadCritical tc; |
266 _num_used++; | |
267 p = get_first(); | |
268 } | |
6197 | 269 if (p == NULL) p = os::malloc(bytes, mtChunk, CURRENT_PC); |
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270 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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271 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "ChunkPool::allocate"); |
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272 } |
0 | 273 return p; |
274 } | |
275 | |
276 // Return a chunk to the pool | |
277 void free(Chunk* chunk) { | |
278 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
279 ThreadCritical tc; | |
280 _num_used--; | |
281 | |
282 // Add chunk to list | |
283 chunk->set_next(_first); | |
284 _first = chunk; | |
285 _num_chunks++; | |
286 } | |
287 | |
288 // Prune the pool | |
289 void free_all_but(size_t n) { | |
6197 | 290 Chunk* cur = NULL; |
291 Chunk* next; | |
292 { | |
0 | 293 // if we have more than n chunks, free all of them |
294 ThreadCritical tc; | |
295 if (_num_chunks > n) { | |
296 // free chunks at end of queue, for better locality | |
6197 | 297 cur = _first; |
0 | 298 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); |
299 | |
300 if (cur != NULL) { | |
6197 | 301 next = cur->next(); |
0 | 302 cur->set_next(NULL); |
303 cur = next; | |
304 | |
6197 | 305 _num_chunks = n; |
306 } | |
307 } | |
308 } | |
309 | |
310 // Free all remaining chunks, outside of ThreadCritical | |
311 // to avoid deadlock with NMT | |
0 | 312 while(cur != NULL) { |
313 next = cur->next(); | |
6197 | 314 os::free(cur, mtChunk); |
0 | 315 cur = next; |
316 } | |
317 } | |
318 | |
319 // Accessors to preallocated pool's | |
320 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
321 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
322 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
11095 | 323 static ChunkPool* tiny_pool() { assert(_tiny_pool != NULL, "must be initialized"); return _tiny_pool; } |
0 | 324 |
325 static void initialize() { | |
326 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
327 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
328 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
11095 | 329 _tiny_pool = new ChunkPool(Chunk::tiny_size + Chunk::aligned_overhead_size()); |
0 | 330 } |
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331 |
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332 static void clean() { |
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333 enum { BlocksToKeep = 5 }; |
11095 | 334 _tiny_pool->free_all_but(BlocksToKeep); |
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335 _small_pool->free_all_but(BlocksToKeep); |
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336 _medium_pool->free_all_but(BlocksToKeep); |
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337 _large_pool->free_all_but(BlocksToKeep); |
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338 } |
0 | 339 }; |
340 | |
341 ChunkPool* ChunkPool::_large_pool = NULL; | |
342 ChunkPool* ChunkPool::_medium_pool = NULL; | |
343 ChunkPool* ChunkPool::_small_pool = NULL; | |
11095 | 344 ChunkPool* ChunkPool::_tiny_pool = NULL; |
0 | 345 |
346 void chunkpool_init() { | |
347 ChunkPool::initialize(); | |
348 } | |
349 | |
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350 void |
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351 Chunk::clean_chunk_pool() { |
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352 ChunkPool::clean(); |
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353 } |
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354 |
0 | 355 |
356 //-------------------------------------------------------------------------------------- | |
357 // ChunkPoolCleaner implementation | |
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358 // |
0 | 359 |
360 class ChunkPoolCleaner : public PeriodicTask { | |
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361 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
0 | 362 |
363 public: | |
364 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
365 void task() { | |
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366 ChunkPool::clean(); |
0 | 367 } |
368 }; | |
369 | |
370 //-------------------------------------------------------------------------------------- | |
371 // Chunk implementation | |
372 | |
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373 void* Chunk::operator new (size_t requested_size, AllocFailType alloc_failmode, size_t length) { |
0 | 374 // requested_size is equal to sizeof(Chunk) but in order for the arena |
375 // allocations to come out aligned as expected the size must be aligned | |
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376 // to expected arena alignment. |
0 | 377 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. |
378 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
379 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
380 switch (length) { | |
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381 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes, alloc_failmode); |
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382 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes, alloc_failmode); |
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383 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes, alloc_failmode); |
11095 | 384 case Chunk::tiny_size: return ChunkPool::tiny_pool()->allocate(bytes, alloc_failmode); |
0 | 385 default: { |
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386 void* p = os::malloc(bytes, mtChunk, CALLER_PC); |
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387 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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388 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "Chunk::new"); |
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389 } |
0 | 390 return p; |
391 } | |
392 } | |
393 } | |
394 | |
395 void Chunk::operator delete(void* p) { | |
396 Chunk* c = (Chunk*)p; | |
397 switch (c->length()) { | |
398 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
399 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
400 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
11095 | 401 case Chunk::tiny_size: ChunkPool::tiny_pool()->free(c); break; |
6197 | 402 default: os::free(c, mtChunk); |
0 | 403 } |
404 } | |
405 | |
406 Chunk::Chunk(size_t length) : _len(length) { | |
407 _next = NULL; // Chain on the linked list | |
408 } | |
409 | |
410 | |
411 void Chunk::chop() { | |
412 Chunk *k = this; | |
413 while( k ) { | |
414 Chunk *tmp = k->next(); | |
415 // clear out this chunk (to detect allocation bugs) | |
416 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
417 delete k; // Free chunk (was malloc'd) | |
418 k = tmp; | |
419 } | |
420 } | |
421 | |
422 void Chunk::next_chop() { | |
423 _next->chop(); | |
424 _next = NULL; | |
425 } | |
426 | |
427 | |
428 void Chunk::start_chunk_pool_cleaner_task() { | |
429 #ifdef ASSERT | |
430 static bool task_created = false; | |
431 assert(!task_created, "should not start chuck pool cleaner twice"); | |
432 task_created = true; | |
433 #endif | |
434 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
435 cleaner->enroll(); | |
436 } | |
437 | |
438 //------------------------------Arena------------------------------------------ | |
6197 | 439 NOT_PRODUCT(volatile jint Arena::_instance_count = 0;) |
0 | 440 |
441 Arena::Arena(size_t init_size) { | |
442 size_t round_size = (sizeof (char *)) - 1; | |
443 init_size = (init_size+round_size) & ~round_size; | |
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444 _first = _chunk = new (AllocFailStrategy::EXIT_OOM, init_size) Chunk(init_size); |
0 | 445 _hwm = _chunk->bottom(); // Save the cached hwm, max |
446 _max = _chunk->top(); | |
447 set_size_in_bytes(init_size); | |
6197 | 448 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
0 | 449 } |
450 | |
451 Arena::Arena() { | |
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452 _first = _chunk = new (AllocFailStrategy::EXIT_OOM, Chunk::init_size) Chunk(Chunk::init_size); |
0 | 453 _hwm = _chunk->bottom(); // Save the cached hwm, max |
454 _max = _chunk->top(); | |
455 set_size_in_bytes(Chunk::init_size); | |
6197 | 456 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
0 | 457 } |
458 | |
459 Arena *Arena::move_contents(Arena *copy) { | |
460 copy->destruct_contents(); | |
461 copy->_chunk = _chunk; | |
462 copy->_hwm = _hwm; | |
463 copy->_max = _max; | |
464 copy->_first = _first; | |
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465 |
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466 // workaround rare racing condition, which could double count |
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467 // the arena size by native memory tracking |
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468 size_t size = size_in_bytes(); |
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469 set_size_in_bytes(0); |
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470 copy->set_size_in_bytes(size); |
0 | 471 // Destroy original arena |
472 reset(); | |
473 return copy; // Return Arena with contents | |
474 } | |
475 | |
476 Arena::~Arena() { | |
477 destruct_contents(); | |
6197 | 478 NOT_PRODUCT(Atomic::dec(&_instance_count);) |
479 } | |
480 | |
481 void* Arena::operator new(size_t size) { | |
482 assert(false, "Use dynamic memory type binding"); | |
483 return NULL; | |
484 } | |
485 | |
486 void* Arena::operator new (size_t size, const std::nothrow_t& nothrow_constant) { | |
487 assert(false, "Use dynamic memory type binding"); | |
488 return NULL; | |
489 } | |
490 | |
491 // dynamic memory type binding | |
492 void* Arena::operator new(size_t size, MEMFLAGS flags) { | |
493 #ifdef ASSERT | |
494 void* p = (void*)AllocateHeap(size, flags|otArena, CALLER_PC); | |
495 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
496 return p; | |
497 #else | |
498 return (void *) AllocateHeap(size, flags|otArena, CALLER_PC); | |
499 #endif | |
500 } | |
501 | |
502 void* Arena::operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) { | |
503 #ifdef ASSERT | |
504 void* p = os::malloc(size, flags|otArena, CALLER_PC); | |
505 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
506 return p; | |
507 #else | |
508 return os::malloc(size, flags|otArena, CALLER_PC); | |
509 #endif | |
510 } | |
511 | |
512 void Arena::operator delete(void* p) { | |
513 FreeHeap(p); | |
0 | 514 } |
515 | |
516 // Destroy this arenas contents and reset to empty | |
517 void Arena::destruct_contents() { | |
518 if (UseMallocOnly && _first != NULL) { | |
519 char* end = _first->next() ? _first->top() : _hwm; | |
520 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
521 } | |
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522 // reset size before chop to avoid a rare racing condition |
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523 // that can have total arena memory exceed total chunk memory |
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524 set_size_in_bytes(0); |
0 | 525 _first->chop(); |
526 reset(); | |
527 } | |
528 | |
6197 | 529 // This is high traffic method, but many calls actually don't |
530 // change the size | |
531 void Arena::set_size_in_bytes(size_t size) { | |
532 if (_size_in_bytes != size) { | |
533 _size_in_bytes = size; | |
534 MemTracker::record_arena_size((address)this, size); | |
535 } | |
536 } | |
0 | 537 |
538 // Total of all Chunks in arena | |
539 size_t Arena::used() const { | |
540 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
541 register Chunk *k = _first; | |
542 while( k != _chunk) { // Whilst have Chunks in a row | |
543 sum += k->length(); // Total size of this Chunk | |
544 k = k->next(); // Bump along to next Chunk | |
545 } | |
546 return sum; // Return total consumed space. | |
547 } | |
548 | |
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549 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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550 vm_exit_out_of_memory(sz, OOM_MALLOC_ERROR, whence); |
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551 } |
0 | 552 |
553 // Grow a new Chunk | |
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554 void* Arena::grow(size_t x, AllocFailType alloc_failmode) { |
0 | 555 // Get minimal required size. Either real big, or even bigger for giant objs |
556 size_t len = MAX2(x, (size_t) Chunk::size); | |
557 | |
558 Chunk *k = _chunk; // Get filled-up chunk address | |
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559 _chunk = new (alloc_failmode, len) Chunk(len); |
0 | 560 |
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561 if (_chunk == NULL) { |
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562 return NULL; |
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563 } |
0 | 564 if (k) k->set_next(_chunk); // Append new chunk to end of linked list |
565 else _first = _chunk; | |
566 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
567 _max = _chunk->top(); | |
568 set_size_in_bytes(size_in_bytes() + len); | |
569 void* result = _hwm; | |
570 _hwm += x; | |
571 return result; | |
572 } | |
573 | |
574 | |
575 | |
576 // Reallocate storage in Arena. | |
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577 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size, AllocFailType alloc_failmode) { |
0 | 578 assert(new_size >= 0, "bad size"); |
579 if (new_size == 0) return NULL; | |
580 #ifdef ASSERT | |
581 if (UseMallocOnly) { | |
582 // always allocate a new object (otherwise we'll free this one twice) | |
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583 char* copy = (char*)Amalloc(new_size, alloc_failmode); |
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584 if (copy == NULL) { |
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585 return NULL; |
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586 } |
0 | 587 size_t n = MIN2(old_size, new_size); |
588 if (n > 0) memcpy(copy, old_ptr, n); | |
589 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
590 return copy; | |
591 } | |
592 #endif | |
593 char *c_old = (char*)old_ptr; // Handy name | |
594 // Stupid fast special case | |
595 if( new_size <= old_size ) { // Shrink in-place | |
596 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
597 _hwm = c_old+new_size; // Adjust hwm | |
598 return c_old; | |
599 } | |
600 | |
601 // make sure that new_size is legal | |
602 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
603 | |
604 // See if we can resize in-place | |
605 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
606 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
607 _hwm = c_old+corrected_new_size; // Adjust hwm | |
608 return c_old; // Return old pointer | |
609 } | |
610 | |
611 // Oops, got to relocate guts | |
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612 void *new_ptr = Amalloc(new_size, alloc_failmode); |
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613 if (new_ptr == NULL) { |
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614 return NULL; |
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615 } |
0 | 616 memcpy( new_ptr, c_old, old_size ); |
617 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
618 return new_ptr; | |
619 } | |
620 | |
621 | |
622 // Determine if pointer belongs to this Arena or not. | |
623 bool Arena::contains( const void *ptr ) const { | |
624 #ifdef ASSERT | |
625 if (UseMallocOnly) { | |
626 // really slow, but not easy to make fast | |
627 if (_chunk == NULL) return false; | |
628 char** bottom = (char**)_chunk->bottom(); | |
629 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
630 if (*p == ptr) return true; | |
631 } | |
632 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
633 if (c == _chunk) continue; // current chunk has been processed | |
634 char** bottom = (char**)c->bottom(); | |
635 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
636 if (*p == ptr) return true; | |
637 } | |
638 } | |
639 return false; | |
640 } | |
641 #endif | |
642 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
643 return true; // Check for in this chunk | |
644 for (Chunk *c = _first; c; c = c->next()) { | |
645 if (c == _chunk) continue; // current chunk has been processed | |
646 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
647 return true; // Check for every chunk in Arena | |
648 } | |
649 } | |
650 return false; // Not in any Chunk, so not in Arena | |
651 } | |
652 | |
653 | |
654 #ifdef ASSERT | |
655 void* Arena::malloc(size_t size) { | |
656 assert(UseMallocOnly, "shouldn't call"); | |
657 // use malloc, but save pointer in res. area for later freeing | |
658 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
6197 | 659 return (*save = (char*)os::malloc(size, mtChunk)); |
0 | 660 } |
661 | |
662 // for debugging with UseMallocOnly | |
663 void* Arena::internal_malloc_4(size_t x) { | |
664 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
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665 check_for_overflow(x, "Arena::internal_malloc_4"); |
0 | 666 if (_hwm + x > _max) { |
667 return grow(x); | |
668 } else { | |
669 char *old = _hwm; | |
670 _hwm += x; | |
671 return old; | |
672 } | |
673 } | |
674 #endif | |
675 | |
676 | |
677 //-------------------------------------------------------------------------------------- | |
678 // Non-product code | |
679 | |
680 #ifndef PRODUCT | |
681 // The global operator new should never be called since it will usually indicate | |
682 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
683 // that they're allocated on the C heap. | |
684 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
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685 // On certain platforms, such as Mac OS X (Darwin), in debug version, new is being called |
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686 // from jdk source and causing data corruption. Such as |
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687 // Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair |
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688 // define ALLOW_OPERATOR_NEW_USAGE for platform on which global operator new allowed. |
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689 // |
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690 #ifndef ALLOW_OPERATOR_NEW_USAGE |
0 | 691 void* operator new(size_t size){ |
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692 assert(false, "Should not call global operator new"); |
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693 return 0; |
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694 } |
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695 |
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696 void* operator new [](size_t size){ |
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697 assert(false, "Should not call global operator new[]"); |
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698 return 0; |
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699 } |
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700 |
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701 void* operator new(size_t size, const std::nothrow_t& nothrow_constant){ |
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702 assert(false, "Should not call global operator new"); |
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703 return 0; |
0 | 704 } |
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705 |
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706 void* operator new [](size_t size, std::nothrow_t& nothrow_constant){ |
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707 assert(false, "Should not call global operator new[]"); |
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708 return 0; |
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709 } |
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710 |
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711 void operator delete(void* p) { |
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712 assert(false, "Should not call global delete"); |
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713 } |
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714 |
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715 void operator delete [](void* p) { |
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716 assert(false, "Should not call global delete []"); |
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717 } |
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718 #endif // ALLOW_OPERATOR_NEW_USAGE |
0 | 719 |
720 void AllocatedObj::print() const { print_on(tty); } | |
721 void AllocatedObj::print_value() const { print_value_on(tty); } | |
722 | |
723 void AllocatedObj::print_on(outputStream* st) const { | |
724 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
725 } | |
726 | |
727 void AllocatedObj::print_value_on(outputStream* st) const { | |
728 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
729 } | |
730 | |
2250 | 731 julong Arena::_bytes_allocated = 0; |
732 | |
733 void Arena::inc_bytes_allocated(size_t x) { inc_stat_counter(&_bytes_allocated, x); } | |
0 | 734 |
735 AllocStats::AllocStats() { | |
2250 | 736 start_mallocs = os::num_mallocs; |
737 start_frees = os::num_frees; | |
0 | 738 start_malloc_bytes = os::alloc_bytes; |
2250 | 739 start_mfree_bytes = os::free_bytes; |
740 start_res_bytes = Arena::_bytes_allocated; | |
0 | 741 } |
742 | |
2250 | 743 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } |
744 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
745 julong AllocStats::num_frees() { return os::num_frees - start_frees; } | |
746 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; } | |
747 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
0 | 748 void AllocStats::print() { |
2250 | 749 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), " |
750 UINT64_FORMAT" frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc", | |
751 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M); | |
0 | 752 } |
753 | |
754 | |
755 // debugging code | |
756 inline void Arena::free_all(char** start, char** end) { | |
757 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
758 } | |
759 | |
760 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
761 assert(UseMallocOnly, "should not call"); | |
762 // free all objects malloced since resource mark was created; resource area | |
763 // contains their addresses | |
764 if (chunk->next()) { | |
765 // this chunk is full, and some others too | |
766 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
767 char* top = c->top(); | |
768 if (c->next() == NULL) { | |
769 top = hwm2; // last junk is only used up to hwm2 | |
770 assert(c->contains(hwm2), "bad hwm2"); | |
771 } | |
772 free_all((char**)c->bottom(), (char**)top); | |
773 } | |
774 assert(chunk->contains(hwm), "bad hwm"); | |
775 assert(chunk->contains(max), "bad max"); | |
776 free_all((char**)hwm, (char**)max); | |
777 } else { | |
778 // this chunk was partially used | |
779 assert(chunk->contains(hwm), "bad hwm"); | |
780 assert(chunk->contains(hwm2), "bad hwm2"); | |
781 free_all((char**)hwm, (char**)hwm2); | |
782 } | |
783 } | |
784 | |
785 | |
786 ReallocMark::ReallocMark() { | |
787 #ifdef ASSERT | |
788 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
789 _nesting = thread->resource_area()->nesting(); | |
790 #endif | |
791 } | |
792 | |
793 void ReallocMark::check() { | |
794 #ifdef ASSERT | |
795 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
796 fatal("allocation bug: array could grow within nested ResourceMark"); | |
797 } | |
798 #endif | |
799 } | |
800 | |
801 #endif // Non-product |