Mercurial > hg > truffle
annotate src/share/vm/memory/allocation.cpp @ 21791:cd36556e1b78
Remove conditional makefile-based compilation of jvmci from mx_graal.py
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Mon, 08 Jun 2015 14:25:25 +0200 |
parents | 7848fc12602b |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 | |
14411 | 48 #ifdef TARGET_OS_FAMILY_aix |
49 # include "os_aix.inline.hpp" | |
50 #endif | |
3960 | 51 #ifdef TARGET_OS_FAMILY_bsd |
52 # include "os_bsd.inline.hpp" | |
53 #endif | |
0 | 54 |
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55 void* StackObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; } |
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56 void StackObj::operator delete(void* p) { ShouldNotCallThis(); } |
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57 void* StackObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; } |
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58 void StackObj::operator delete [](void* p) { ShouldNotCallThis(); } |
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59 |
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60 void* _ValueObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; } |
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61 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); } |
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62 void* _ValueObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; } |
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63 void _ValueObj::operator delete [](void* p) { ShouldNotCallThis(); } |
0 | 64 |
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65 void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data, |
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66 size_t word_size, bool read_only, |
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67 MetaspaceObj::Type type, TRAPS) throw() { |
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68 // Klass has it's own operator new |
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69 return Metaspace::allocate(loader_data, word_size, read_only, |
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70 type, CHECK_NULL); |
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71 } |
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72 |
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73 bool MetaspaceObj::is_shared() const { |
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74 return MetaspaceShared::is_in_shared_space(this); |
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75 } |
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76 |
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77 bool MetaspaceObj::is_metaspace_object() const { |
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78 return Metaspace::contains((void*)this); |
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79 } |
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80 |
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81 void MetaspaceObj::print_address_on(outputStream* st) const { |
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82 st->print(" {" INTPTR_FORMAT "}", p2i(this)); |
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83 } |
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84 |
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85 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) throw() { |
0 | 86 address res; |
87 switch (type) { | |
88 case C_HEAP: | |
6197 | 89 res = (address)AllocateHeap(size, flags, CALLER_PC); |
1685 | 90 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
0 | 91 break; |
92 case RESOURCE_AREA: | |
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93 // new(size) sets allocation type RESOURCE_AREA. |
0 | 94 res = (address)operator new(size); |
95 break; | |
96 default: | |
97 ShouldNotReachHere(); | |
98 } | |
99 return res; | |
100 } | |
101 | |
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102 void* ResourceObj::operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw() { |
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103 return (address) operator new(size, type, flags); |
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104 } |
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105 |
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106 void* ResourceObj::operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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107 allocation_type type, MEMFLAGS flags) throw() { |
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108 //should only call this with std::nothrow, use other operator new() otherwise |
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109 address res; |
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110 switch (type) { |
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111 case C_HEAP: |
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112 res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL); |
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113 DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);) |
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114 break; |
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115 case RESOURCE_AREA: |
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116 // new(size) sets allocation type RESOURCE_AREA. |
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117 res = (address)operator new(size, std::nothrow); |
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118 break; |
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119 default: |
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120 ShouldNotReachHere(); |
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121 } |
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122 return res; |
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123 } |
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124 |
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125 void* ResourceObj::operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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126 allocation_type type, MEMFLAGS flags) throw() { |
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127 return (address)operator new(size, nothrow_constant, type, flags); |
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128 } |
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129 |
0 | 130 void ResourceObj::operator delete(void* p) { |
131 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
132 "delete only allowed for C_HEAP objects"); | |
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133 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
0 | 134 FreeHeap(p); |
135 } | |
136 | |
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137 void ResourceObj::operator delete [](void* p) { |
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138 operator delete(p); |
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139 } |
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140 |
1685 | 141 #ifdef ASSERT |
142 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
143 // Set allocation type in the resource object | |
144 uintptr_t allocation = (uintptr_t)res; | |
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145 assert((allocation & allocation_mask) == 0, err_msg("address should be aligned to 4 bytes at least: " INTPTR_FORMAT, p2i(res))); |
1685 | 146 assert(type <= allocation_mask, "incorrect allocation type"); |
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147 ResourceObj* resobj = (ResourceObj *)res; |
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148 resobj->_allocation_t[0] = ~(allocation + type); |
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149 if (type != STACK_OR_EMBEDDED) { |
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150 // Called from operator new() and CollectionSetChooser(), |
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151 // set verification value. |
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152 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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153 } |
1685 | 154 } |
155 | |
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156 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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157 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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158 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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159 } |
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160 |
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161 bool ResourceObj::is_type_set() const { |
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162 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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163 return get_allocation_type() == type && |
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164 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
1685 | 165 } |
166 | |
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167 ResourceObj::ResourceObj() { // default constructor |
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168 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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169 // Operator new() is not called for allocations |
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170 // on stack and for embedded objects. |
1685 | 171 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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172 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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173 // For some reason we got a value which resembles |
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174 // an embedded or stack object (operator new() does not |
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175 // set such type). Keep it since it is valid value |
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176 // (even if it was garbage). |
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177 // Ignore garbage in other fields. |
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178 } else if (is_type_set()) { |
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179 // Operator new() was called and type was set. |
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180 assert(!allocated_on_stack(), |
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181 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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182 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
1685 | 183 } else { |
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184 // Operator new() was not called. |
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185 // Assume that it is embedded or stack object. |
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186 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
1685 | 187 } |
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188 _allocation_t[1] = 0; // Zap verification value |
1685 | 189 } |
190 | |
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191 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
1685 | 192 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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193 // Note: garbage may resembles valid value. |
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194 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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195 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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196 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
1685 | 197 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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198 _allocation_t[1] = 0; // Zap verification value |
1685 | 199 } |
200 | |
201 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
202 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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203 assert(allocated_on_stack(), |
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204 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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205 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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206 // Keep current _allocation_t value; |
1685 | 207 return *this; |
208 } | |
209 | |
210 ResourceObj::~ResourceObj() { | |
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211 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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212 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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213 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
1685 | 214 } |
215 } | |
216 #endif // ASSERT | |
217 | |
218 | |
0 | 219 void trace_heap_malloc(size_t size, const char* name, void* p) { |
220 // A lock is not needed here - tty uses a lock internally | |
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221 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p2i(p), size, name == NULL ? "" : name); |
0 | 222 } |
223 | |
224 | |
225 void trace_heap_free(void* p) { | |
226 // A lock is not needed here - tty uses a lock internally | |
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227 tty->print_cr("Heap free " INTPTR_FORMAT, p2i(p)); |
0 | 228 } |
229 | |
230 //-------------------------------------------------------------------------------------- | |
231 // ChunkPool implementation | |
232 | |
233 // MT-safe pool of chunks to reduce malloc/free thrashing | |
234 // NB: not using Mutex because pools are used before Threads are initialized | |
6197 | 235 class ChunkPool: public CHeapObj<mtInternal> { |
0 | 236 Chunk* _first; // first cached Chunk; its first word points to next chunk |
237 size_t _num_chunks; // number of unused chunks in pool | |
238 size_t _num_used; // number of chunks currently checked out | |
239 const size_t _size; // size of each chunk (must be uniform) | |
240 | |
11095 | 241 // Our four static pools |
0 | 242 static ChunkPool* _large_pool; |
243 static ChunkPool* _medium_pool; | |
244 static ChunkPool* _small_pool; | |
11095 | 245 static ChunkPool* _tiny_pool; |
0 | 246 |
247 // return first element or null | |
248 void* get_first() { | |
249 Chunk* c = _first; | |
250 if (_first) { | |
251 _first = _first->next(); | |
252 _num_chunks--; | |
253 } | |
254 return c; | |
255 } | |
256 | |
257 public: | |
258 // All chunks in a ChunkPool has the same size | |
259 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
260 | |
261 // Allocate a new chunk from the pool (might expand the pool) | |
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262 _NOINLINE_ void* allocate(size_t bytes, AllocFailType alloc_failmode) { |
0 | 263 assert(bytes == _size, "bad size"); |
264 void* p = NULL; | |
6197 | 265 // No VM lock can be taken inside ThreadCritical lock, so os::malloc |
266 // should be done outside ThreadCritical lock due to NMT | |
0 | 267 { ThreadCritical tc; |
268 _num_used++; | |
269 p = get_first(); | |
270 } | |
6197 | 271 if (p == NULL) p = os::malloc(bytes, mtChunk, CURRENT_PC); |
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272 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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273 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "ChunkPool::allocate"); |
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274 } |
0 | 275 return p; |
276 } | |
277 | |
278 // Return a chunk to the pool | |
279 void free(Chunk* chunk) { | |
280 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
281 ThreadCritical tc; | |
282 _num_used--; | |
283 | |
284 // Add chunk to list | |
285 chunk->set_next(_first); | |
286 _first = chunk; | |
287 _num_chunks++; | |
288 } | |
289 | |
290 // Prune the pool | |
291 void free_all_but(size_t n) { | |
6197 | 292 Chunk* cur = NULL; |
293 Chunk* next; | |
294 { | |
0 | 295 // if we have more than n chunks, free all of them |
296 ThreadCritical tc; | |
297 if (_num_chunks > n) { | |
298 // free chunks at end of queue, for better locality | |
6197 | 299 cur = _first; |
0 | 300 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); |
301 | |
302 if (cur != NULL) { | |
6197 | 303 next = cur->next(); |
0 | 304 cur->set_next(NULL); |
305 cur = next; | |
306 | |
6197 | 307 _num_chunks = n; |
308 } | |
309 } | |
310 } | |
311 | |
312 // Free all remaining chunks, outside of ThreadCritical | |
313 // to avoid deadlock with NMT | |
0 | 314 while(cur != NULL) { |
315 next = cur->next(); | |
6197 | 316 os::free(cur, mtChunk); |
0 | 317 cur = next; |
318 } | |
319 } | |
320 | |
321 // Accessors to preallocated pool's | |
322 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
323 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
324 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
11095 | 325 static ChunkPool* tiny_pool() { assert(_tiny_pool != NULL, "must be initialized"); return _tiny_pool; } |
0 | 326 |
327 static void initialize() { | |
328 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
329 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
330 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
11095 | 331 _tiny_pool = new ChunkPool(Chunk::tiny_size + Chunk::aligned_overhead_size()); |
0 | 332 } |
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333 |
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334 static void clean() { |
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335 enum { BlocksToKeep = 5 }; |
11095 | 336 _tiny_pool->free_all_but(BlocksToKeep); |
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337 _small_pool->free_all_but(BlocksToKeep); |
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338 _medium_pool->free_all_but(BlocksToKeep); |
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339 _large_pool->free_all_but(BlocksToKeep); |
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340 } |
0 | 341 }; |
342 | |
343 ChunkPool* ChunkPool::_large_pool = NULL; | |
344 ChunkPool* ChunkPool::_medium_pool = NULL; | |
345 ChunkPool* ChunkPool::_small_pool = NULL; | |
11095 | 346 ChunkPool* ChunkPool::_tiny_pool = NULL; |
0 | 347 |
348 void chunkpool_init() { | |
349 ChunkPool::initialize(); | |
350 } | |
351 | |
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352 void |
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353 Chunk::clean_chunk_pool() { |
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354 ChunkPool::clean(); |
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355 } |
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356 |
0 | 357 |
358 //-------------------------------------------------------------------------------------- | |
359 // ChunkPoolCleaner implementation | |
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360 // |
0 | 361 |
362 class ChunkPoolCleaner : public PeriodicTask { | |
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363 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
0 | 364 |
365 public: | |
366 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
367 void task() { | |
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368 ChunkPool::clean(); |
0 | 369 } |
370 }; | |
371 | |
372 //-------------------------------------------------------------------------------------- | |
373 // Chunk implementation | |
374 | |
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375 void* Chunk::operator new (size_t requested_size, AllocFailType alloc_failmode, size_t length) throw() { |
0 | 376 // requested_size is equal to sizeof(Chunk) but in order for the arena |
377 // allocations to come out aligned as expected the size must be aligned | |
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378 // to expected arena alignment. |
0 | 379 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. |
380 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
381 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
382 switch (length) { | |
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383 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes, alloc_failmode); |
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384 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes, alloc_failmode); |
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385 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes, alloc_failmode); |
11095 | 386 case Chunk::tiny_size: return ChunkPool::tiny_pool()->allocate(bytes, alloc_failmode); |
0 | 387 default: { |
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388 void* p = os::malloc(bytes, mtChunk, CALLER_PC); |
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389 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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390 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "Chunk::new"); |
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391 } |
0 | 392 return p; |
393 } | |
394 } | |
395 } | |
396 | |
397 void Chunk::operator delete(void* p) { | |
398 Chunk* c = (Chunk*)p; | |
399 switch (c->length()) { | |
400 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
401 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
402 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
11095 | 403 case Chunk::tiny_size: ChunkPool::tiny_pool()->free(c); break; |
6197 | 404 default: os::free(c, mtChunk); |
0 | 405 } |
406 } | |
407 | |
408 Chunk::Chunk(size_t length) : _len(length) { | |
409 _next = NULL; // Chain on the linked list | |
410 } | |
411 | |
412 | |
413 void Chunk::chop() { | |
414 Chunk *k = this; | |
415 while( k ) { | |
416 Chunk *tmp = k->next(); | |
417 // clear out this chunk (to detect allocation bugs) | |
418 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
419 delete k; // Free chunk (was malloc'd) | |
420 k = tmp; | |
421 } | |
422 } | |
423 | |
424 void Chunk::next_chop() { | |
425 _next->chop(); | |
426 _next = NULL; | |
427 } | |
428 | |
429 | |
430 void Chunk::start_chunk_pool_cleaner_task() { | |
431 #ifdef ASSERT | |
432 static bool task_created = false; | |
433 assert(!task_created, "should not start chuck pool cleaner twice"); | |
434 task_created = true; | |
435 #endif | |
436 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
437 cleaner->enroll(); | |
438 } | |
439 | |
440 //------------------------------Arena------------------------------------------ | |
20360 | 441 Arena::Arena(MEMFLAGS flag, size_t init_size) : _flags(flag), _size_in_bytes(0) { |
0 | 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(); | |
20360 | 447 MemTracker::record_new_arena(flag); |
0 | 448 set_size_in_bytes(init_size); |
449 } | |
450 | |
20360 | 451 Arena::Arena(MEMFLAGS flag) : _flags(flag), _size_in_bytes(0) { |
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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(); | |
20360 | 455 MemTracker::record_new_arena(flag); |
0 | 456 set_size_in_bytes(Chunk::init_size); |
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(); | |
20360 | 478 MemTracker::record_arena_free(_flags); |
6197 | 479 } |
480 | |
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481 void* Arena::operator new(size_t size) throw() { |
6197 | 482 assert(false, "Use dynamic memory type binding"); |
483 return NULL; | |
484 } | |
485 | |
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486 void* Arena::operator new (size_t size, const std::nothrow_t& nothrow_constant) throw() { |
6197 | 487 assert(false, "Use dynamic memory type binding"); |
488 return NULL; | |
489 } | |
490 | |
491 // dynamic memory type binding | |
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492 void* Arena::operator new(size_t size, MEMFLAGS flags) throw() { |
6197 | 493 #ifdef ASSERT |
20360 | 494 void* p = (void*)AllocateHeap(size, flags, CALLER_PC); |
6197 | 495 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); |
496 return p; | |
497 #else | |
20360 | 498 return (void *) AllocateHeap(size, flags, CALLER_PC); |
6197 | 499 #endif |
500 } | |
501 | |
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502 void* Arena::operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw() { |
6197 | 503 #ifdef ASSERT |
20360 | 504 void* p = os::malloc(size, flags, CALLER_PC); |
6197 | 505 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); |
506 return p; | |
507 #else | |
20360 | 508 return os::malloc(size, flags, CALLER_PC); |
6197 | 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) { | |
20360 | 533 long delta = (long)(size - size_in_bytes()); |
6197 | 534 _size_in_bytes = size; |
20360 | 535 MemTracker::record_arena_size_change(delta, _flags); |
6197 | 536 } |
537 } | |
0 | 538 |
539 // Total of all Chunks in arena | |
540 size_t Arena::used() const { | |
541 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
542 register Chunk *k = _first; | |
543 while( k != _chunk) { // Whilst have Chunks in a row | |
544 sum += k->length(); // Total size of this Chunk | |
545 k = k->next(); // Bump along to next Chunk | |
546 } | |
547 return sum; // Return total consumed space. | |
548 } | |
549 | |
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550 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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551 vm_exit_out_of_memory(sz, OOM_MALLOC_ERROR, whence); |
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552 } |
0 | 553 |
554 // Grow a new Chunk | |
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555 void* Arena::grow(size_t x, AllocFailType alloc_failmode) { |
0 | 556 // Get minimal required size. Either real big, or even bigger for giant objs |
557 size_t len = MAX2(x, (size_t) Chunk::size); | |
558 | |
559 Chunk *k = _chunk; // Get filled-up chunk address | |
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560 _chunk = new (alloc_failmode, len) Chunk(len); |
0 | 561 |
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562 if (_chunk == NULL) { |
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563 _chunk = k; // restore the previous value of _chunk |
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564 return NULL; |
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565 } |
0 | 566 if (k) k->set_next(_chunk); // Append new chunk to end of linked list |
567 else _first = _chunk; | |
568 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
569 _max = _chunk->top(); | |
570 set_size_in_bytes(size_in_bytes() + len); | |
571 void* result = _hwm; | |
572 _hwm += x; | |
573 return result; | |
574 } | |
575 | |
576 | |
577 | |
578 // Reallocate storage in Arena. | |
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579 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size, AllocFailType alloc_failmode) { |
0 | 580 assert(new_size >= 0, "bad size"); |
581 if (new_size == 0) return NULL; | |
582 #ifdef ASSERT | |
583 if (UseMallocOnly) { | |
584 // always allocate a new object (otherwise we'll free this one twice) | |
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585 char* copy = (char*)Amalloc(new_size, alloc_failmode); |
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586 if (copy == NULL) { |
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587 return NULL; |
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588 } |
0 | 589 size_t n = MIN2(old_size, new_size); |
590 if (n > 0) memcpy(copy, old_ptr, n); | |
591 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
592 return copy; | |
593 } | |
594 #endif | |
595 char *c_old = (char*)old_ptr; // Handy name | |
596 // Stupid fast special case | |
597 if( new_size <= old_size ) { // Shrink in-place | |
598 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
599 _hwm = c_old+new_size; // Adjust hwm | |
600 return c_old; | |
601 } | |
602 | |
603 // make sure that new_size is legal | |
604 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
605 | |
606 // See if we can resize in-place | |
607 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
608 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
609 _hwm = c_old+corrected_new_size; // Adjust hwm | |
610 return c_old; // Return old pointer | |
611 } | |
612 | |
613 // Oops, got to relocate guts | |
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614 void *new_ptr = Amalloc(new_size, alloc_failmode); |
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615 if (new_ptr == NULL) { |
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616 return NULL; |
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617 } |
0 | 618 memcpy( new_ptr, c_old, old_size ); |
619 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
620 return new_ptr; | |
621 } | |
622 | |
623 | |
624 // Determine if pointer belongs to this Arena or not. | |
625 bool Arena::contains( const void *ptr ) const { | |
626 #ifdef ASSERT | |
627 if (UseMallocOnly) { | |
628 // really slow, but not easy to make fast | |
629 if (_chunk == NULL) return false; | |
630 char** bottom = (char**)_chunk->bottom(); | |
631 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
632 if (*p == ptr) return true; | |
633 } | |
634 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
635 if (c == _chunk) continue; // current chunk has been processed | |
636 char** bottom = (char**)c->bottom(); | |
637 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
638 if (*p == ptr) return true; | |
639 } | |
640 } | |
641 return false; | |
642 } | |
643 #endif | |
644 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
645 return true; // Check for in this chunk | |
646 for (Chunk *c = _first; c; c = c->next()) { | |
647 if (c == _chunk) continue; // current chunk has been processed | |
648 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
649 return true; // Check for every chunk in Arena | |
650 } | |
651 } | |
652 return false; // Not in any Chunk, so not in Arena | |
653 } | |
654 | |
655 | |
656 #ifdef ASSERT | |
657 void* Arena::malloc(size_t size) { | |
658 assert(UseMallocOnly, "shouldn't call"); | |
659 // use malloc, but save pointer in res. area for later freeing | |
660 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
6197 | 661 return (*save = (char*)os::malloc(size, mtChunk)); |
0 | 662 } |
663 | |
664 // for debugging with UseMallocOnly | |
665 void* Arena::internal_malloc_4(size_t x) { | |
666 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
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667 check_for_overflow(x, "Arena::internal_malloc_4"); |
0 | 668 if (_hwm + x > _max) { |
669 return grow(x); | |
670 } else { | |
671 char *old = _hwm; | |
672 _hwm += x; | |
673 return old; | |
674 } | |
675 } | |
676 #endif | |
677 | |
678 | |
679 //-------------------------------------------------------------------------------------- | |
680 // Non-product code | |
681 | |
682 #ifndef PRODUCT | |
683 // The global operator new should never be called since it will usually indicate | |
684 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
685 // that they're allocated on the C heap. | |
686 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
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687 // On certain platforms, such as Mac OS X (Darwin), in debug version, new is being called |
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688 // from jdk source and causing data corruption. Such as |
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689 // Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair |
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690 // define ALLOW_OPERATOR_NEW_USAGE for platform on which global operator new allowed. |
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691 // |
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692 #ifndef ALLOW_OPERATOR_NEW_USAGE |
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693 void* operator new(size_t size) throw() { |
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694 assert(false, "Should not call global operator new"); |
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695 return 0; |
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696 } |
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697 |
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698 void* operator new [](size_t size) throw() { |
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699 assert(false, "Should not call global operator new[]"); |
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700 return 0; |
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701 } |
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702 |
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703 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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704 assert(false, "Should not call global operator new"); |
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705 return 0; |
0 | 706 } |
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707 |
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708 void* operator new [](size_t size, std::nothrow_t& nothrow_constant) throw() { |
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709 assert(false, "Should not call global operator new[]"); |
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710 return 0; |
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711 } |
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712 |
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713 void operator delete(void* p) { |
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714 assert(false, "Should not call global delete"); |
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715 } |
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716 |
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717 void operator delete [](void* p) { |
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718 assert(false, "Should not call global delete []"); |
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719 } |
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720 #endif // ALLOW_OPERATOR_NEW_USAGE |
0 | 721 |
722 void AllocatedObj::print() const { print_on(tty); } | |
723 void AllocatedObj::print_value() const { print_value_on(tty); } | |
724 | |
725 void AllocatedObj::print_on(outputStream* st) const { | |
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726 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", p2i(this)); |
0 | 727 } |
728 | |
729 void AllocatedObj::print_value_on(outputStream* st) const { | |
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730 st->print("AllocatedObj(" INTPTR_FORMAT ")", p2i(this)); |
0 | 731 } |
732 | |
2250 | 733 julong Arena::_bytes_allocated = 0; |
734 | |
735 void Arena::inc_bytes_allocated(size_t x) { inc_stat_counter(&_bytes_allocated, x); } | |
0 | 736 |
737 AllocStats::AllocStats() { | |
2250 | 738 start_mallocs = os::num_mallocs; |
739 start_frees = os::num_frees; | |
0 | 740 start_malloc_bytes = os::alloc_bytes; |
2250 | 741 start_mfree_bytes = os::free_bytes; |
742 start_res_bytes = Arena::_bytes_allocated; | |
0 | 743 } |
744 | |
2250 | 745 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } |
746 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
747 julong AllocStats::num_frees() { return os::num_frees - start_frees; } | |
748 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; } | |
749 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
0 | 750 void AllocStats::print() { |
2250 | 751 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), " |
752 UINT64_FORMAT" frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc", | |
753 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M); | |
0 | 754 } |
755 | |
756 | |
757 // debugging code | |
758 inline void Arena::free_all(char** start, char** end) { | |
759 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
760 } | |
761 | |
762 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
763 assert(UseMallocOnly, "should not call"); | |
764 // free all objects malloced since resource mark was created; resource area | |
765 // contains their addresses | |
766 if (chunk->next()) { | |
767 // this chunk is full, and some others too | |
768 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
769 char* top = c->top(); | |
770 if (c->next() == NULL) { | |
771 top = hwm2; // last junk is only used up to hwm2 | |
772 assert(c->contains(hwm2), "bad hwm2"); | |
773 } | |
774 free_all((char**)c->bottom(), (char**)top); | |
775 } | |
776 assert(chunk->contains(hwm), "bad hwm"); | |
777 assert(chunk->contains(max), "bad max"); | |
778 free_all((char**)hwm, (char**)max); | |
779 } else { | |
780 // this chunk was partially used | |
781 assert(chunk->contains(hwm), "bad hwm"); | |
782 assert(chunk->contains(hwm2), "bad hwm2"); | |
783 free_all((char**)hwm, (char**)hwm2); | |
784 } | |
785 } | |
786 | |
787 | |
788 ReallocMark::ReallocMark() { | |
789 #ifdef ASSERT | |
790 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
791 _nesting = thread->resource_area()->nesting(); | |
792 #endif | |
793 } | |
794 | |
795 void ReallocMark::check() { | |
796 #ifdef ASSERT | |
797 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
798 fatal("allocation bug: array could grow within nested ResourceMark"); | |
799 } | |
800 #endif | |
801 } | |
802 | |
803 #endif // Non-product |