Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/resourceArea.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 | f34d701e952e |
| children | dbc0b5dc08f5 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 6197 | 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_MEMORY_RESOURCEAREA_HPP |
| 26 #define SHARE_VM_MEMORY_RESOURCEAREA_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
|
7180
f34d701e952e
8003935: Simplify the needed includes for using Thread::current()
stefank
parents:
6882
diff
changeset
|
29 #include "runtime/thread.inline.hpp" |
| 1972 | 30 |
| 0 | 31 // The resource area holds temporary data structures in the VM. |
| 32 // The actual allocation areas are thread local. Typical usage: | |
| 33 // | |
| 34 // ... | |
| 35 // { | |
| 36 // ResourceMark rm; | |
| 37 // int foo[] = NEW_RESOURCE_ARRAY(int, 64); | |
| 38 // ... | |
| 39 // } | |
| 40 // ... | |
| 41 | |
| 42 //------------------------------ResourceArea----------------------------------- | |
| 43 // A ResourceArea is an Arena that supports safe usage of ResourceMark. | |
| 44 class ResourceArea: public Arena { | |
| 45 friend class ResourceMark; | |
| 46 friend class DeoptResourceMark; | |
| 3939 | 47 friend class VMStructs; |
| 0 | 48 debug_only(int _nesting;) // current # of nested ResourceMarks |
| 49 debug_only(static int _warned;) // to suppress multiple warnings | |
| 50 | |
| 51 public: | |
| 52 ResourceArea() { | |
| 53 debug_only(_nesting = 0;) | |
| 54 } | |
| 55 | |
| 56 ResourceArea(size_t init_size) : Arena(init_size) { | |
| 57 debug_only(_nesting = 0;); | |
| 58 } | |
| 59 | |
|
6872
7b5885dadbdc
8000617: It should be possible to allocate memory without the VM dying.
nloodin
parents:
6197
diff
changeset
|
60 char* allocate_bytes(size_t size, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
| 0 | 61 #ifdef ASSERT |
| 62 if (_nesting < 1 && !_warned++) | |
| 63 fatal("memory leak: allocating without ResourceMark"); | |
| 64 if (UseMallocOnly) { | |
| 65 // use malloc, but save pointer in res. area for later freeing | |
| 66 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
| 6197 | 67 return (*save = (char*)os::malloc(size, mtThread)); |
| 0 | 68 } |
| 69 #endif | |
|
6872
7b5885dadbdc
8000617: It should be possible to allocate memory without the VM dying.
nloodin
parents:
6197
diff
changeset
|
70 return (char*)Amalloc(size, alloc_failmode); |
| 0 | 71 } |
| 72 | |
| 73 debug_only(int nesting() const { return _nesting; }); | |
| 74 }; | |
| 75 | |
| 76 | |
| 77 //------------------------------ResourceMark----------------------------------- | |
| 78 // A resource mark releases all resources allocated after it was constructed | |
| 79 // when the destructor is called. Typically used as a local variable. | |
| 80 class ResourceMark: public StackObj { | |
| 81 protected: | |
| 82 ResourceArea *_area; // Resource area to stack allocate | |
| 83 Chunk *_chunk; // saved arena chunk | |
| 84 char *_hwm, *_max; | |
| 6197 | 85 size_t _size_in_bytes; |
| 0 | 86 |
| 87 void initialize(Thread *thread) { | |
| 88 _area = thread->resource_area(); | |
| 89 _chunk = _area->_chunk; | |
| 90 _hwm = _area->_hwm; | |
| 91 _max= _area->_max; | |
| 6197 | 92 _size_in_bytes = _area->size_in_bytes(); |
| 0 | 93 debug_only(_area->_nesting++;) |
| 94 assert( _area->_nesting > 0, "must stack allocate RMs" ); | |
| 95 } | |
| 96 public: | |
| 97 | |
| 98 #ifndef ASSERT | |
| 99 ResourceMark(Thread *thread) { | |
| 100 assert(thread == Thread::current(), "not the current thread"); | |
| 101 initialize(thread); | |
| 102 } | |
| 103 #else | |
| 104 ResourceMark(Thread *thread); | |
| 105 #endif // ASSERT | |
| 106 | |
| 107 ResourceMark() { initialize(Thread::current()); } | |
| 108 | |
| 109 ResourceMark( ResourceArea *r ) : | |
| 110 _area(r), _chunk(r->_chunk), _hwm(r->_hwm), _max(r->_max) { | |
| 6197 | 111 _size_in_bytes = r->_size_in_bytes; |
| 0 | 112 debug_only(_area->_nesting++;) |
| 113 assert( _area->_nesting > 0, "must stack allocate RMs" ); | |
| 114 } | |
| 115 | |
| 116 void reset_to_mark() { | |
| 117 if (UseMallocOnly) free_malloced_objects(); | |
| 118 | |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
119 if( _chunk->next() ) { // Delete later chunks |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
120 // reset arena size before delete chunks. Otherwise, the total |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
121 // arena size could exceed total chunk size |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
122 assert(_area->size_in_bytes() > size_in_bytes(), "Sanity check"); |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
123 _area->set_size_in_bytes(size_in_bytes()); |
| 0 | 124 _chunk->next_chop(); |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
125 } else { |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
126 assert(_area->size_in_bytes() == size_in_bytes(), "Sanity check"); |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
127 } |
| 0 | 128 _area->_chunk = _chunk; // Roll back arena to saved chunk |
| 129 _area->_hwm = _hwm; | |
| 130 _area->_max = _max; | |
| 131 | |
| 132 // clear out this chunk (to detect allocation bugs) | |
| 133 if (ZapResourceArea) memset(_hwm, badResourceValue, _max - _hwm); | |
| 134 } | |
| 135 | |
| 136 ~ResourceMark() { | |
| 137 assert( _area->_nesting > 0, "must stack allocate RMs" ); | |
| 138 debug_only(_area->_nesting--;) | |
| 139 reset_to_mark(); | |
| 140 } | |
| 141 | |
| 142 | |
| 143 private: | |
| 144 void free_malloced_objects() PRODUCT_RETURN; | |
| 6197 | 145 size_t size_in_bytes() { return _size_in_bytes; } |
| 0 | 146 }; |
| 147 | |
| 148 //------------------------------DeoptResourceMark----------------------------------- | |
| 149 // A deopt resource mark releases all resources allocated after it was constructed | |
| 150 // when the destructor is called. Typically used as a local variable. It differs | |
| 151 // from a typical resource more in that it is C-Heap allocated so that deoptimization | |
| 152 // can use data structures that are arena based but are not amenable to vanilla | |
| 153 // ResourceMarks because deoptimization can not use a stack allocated mark. During | |
| 154 // deoptimization we go thru the following steps: | |
| 155 // | |
| 156 // 0: start in assembly stub and call either uncommon_trap/fetch_unroll_info | |
| 157 // 1: create the vframeArray (contains pointers to Resource allocated structures) | |
| 158 // This allocates the DeoptResourceMark. | |
| 159 // 2: return to assembly stub and remove stub frame and deoptee frame and create | |
| 160 // the new skeletal frames. | |
| 161 // 3: push new stub frame and call unpack_frames | |
| 162 // 4: retrieve information from the vframeArray to populate the skeletal frames | |
| 163 // 5: release the DeoptResourceMark | |
| 164 // 6: return to stub and eventually to interpreter | |
| 165 // | |
| 166 // With old style eager deoptimization the vframeArray was created by the vmThread there | |
| 167 // was no way for the vframeArray to contain resource allocated objects and so | |
| 168 // a complex set of data structures to simulate an array of vframes in CHeap memory | |
| 169 // was used. With new style lazy deoptimization the vframeArray is created in the | |
| 170 // the thread that will use it and we can use a much simpler scheme for the vframeArray | |
| 171 // leveraging existing data structures if we simply create a way to manage this one | |
| 172 // special need for a ResourceMark. If ResourceMark simply inherited from CHeapObj | |
| 173 // then existing ResourceMarks would work fine since no one use new to allocate them | |
| 174 // and they would be stack allocated. This leaves open the possibilty of accidental | |
| 175 // misuse so we simple duplicate the ResourceMark functionality here. | |
| 176 | |
| 6197 | 177 class DeoptResourceMark: public CHeapObj<mtInternal> { |
| 0 | 178 protected: |
| 179 ResourceArea *_area; // Resource area to stack allocate | |
| 180 Chunk *_chunk; // saved arena chunk | |
| 181 char *_hwm, *_max; | |
| 6197 | 182 size_t _size_in_bytes; |
| 0 | 183 |
| 184 void initialize(Thread *thread) { | |
| 185 _area = thread->resource_area(); | |
| 186 _chunk = _area->_chunk; | |
| 187 _hwm = _area->_hwm; | |
| 188 _max= _area->_max; | |
| 6197 | 189 _size_in_bytes = _area->size_in_bytes(); |
| 0 | 190 debug_only(_area->_nesting++;) |
| 191 assert( _area->_nesting > 0, "must stack allocate RMs" ); | |
| 192 } | |
| 193 | |
| 194 public: | |
| 195 | |
| 196 #ifndef ASSERT | |
| 197 DeoptResourceMark(Thread *thread) { | |
| 198 assert(thread == Thread::current(), "not the current thread"); | |
| 199 initialize(thread); | |
| 200 } | |
| 201 #else | |
| 202 DeoptResourceMark(Thread *thread); | |
| 203 #endif // ASSERT | |
| 204 | |
| 205 DeoptResourceMark() { initialize(Thread::current()); } | |
| 206 | |
| 207 DeoptResourceMark( ResourceArea *r ) : | |
| 208 _area(r), _chunk(r->_chunk), _hwm(r->_hwm), _max(r->_max) { | |
| 6197 | 209 _size_in_bytes = _area->size_in_bytes(); |
| 0 | 210 debug_only(_area->_nesting++;) |
| 211 assert( _area->_nesting > 0, "must stack allocate RMs" ); | |
| 212 } | |
| 213 | |
| 214 void reset_to_mark() { | |
| 215 if (UseMallocOnly) free_malloced_objects(); | |
| 216 | |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
217 if( _chunk->next() ) { // Delete later chunks |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
218 // reset arena size before delete chunks. Otherwise, the total |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
219 // arena size could exceed total chunk size |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
220 assert(_area->size_in_bytes() > size_in_bytes(), "Sanity check"); |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
221 _area->set_size_in_bytes(size_in_bytes()); |
| 0 | 222 _chunk->next_chop(); |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
223 } else { |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
224 assert(_area->size_in_bytes() == size_in_bytes(), "Sanity check"); |
|
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
225 } |
| 0 | 226 _area->_chunk = _chunk; // Roll back arena to saved chunk |
| 227 _area->_hwm = _hwm; | |
| 228 _area->_max = _max; | |
| 229 | |
| 230 // clear out this chunk (to detect allocation bugs) | |
| 231 if (ZapResourceArea) memset(_hwm, badResourceValue, _max - _hwm); | |
| 232 } | |
| 233 | |
| 234 ~DeoptResourceMark() { | |
| 235 assert( _area->_nesting > 0, "must stack allocate RMs" ); | |
| 236 debug_only(_area->_nesting--;) | |
| 237 reset_to_mark(); | |
| 238 } | |
| 239 | |
| 240 | |
| 241 private: | |
| 242 void free_malloced_objects() PRODUCT_RETURN; | |
| 6197 | 243 size_t size_in_bytes() { return _size_in_bytes; }; |
| 0 | 244 }; |
| 1972 | 245 |
| 246 #endif // SHARE_VM_MEMORY_RESOURCEAREA_HPP |