Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/allocation.cpp @ 1966:4110c3e0c50d
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author | iveresov |
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date | Fri, 19 Nov 2010 17:01:34 -0800 |
parents | ebfb7c68865e |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2005, 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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_allocation.cpp.incl" | |
27 | |
28 void* CHeapObj::operator new(size_t size){ | |
29 return (void *) AllocateHeap(size, "CHeapObj-new"); | |
30 } | |
31 | |
32 void CHeapObj::operator delete(void* p){ | |
33 FreeHeap(p); | |
34 } | |
35 | |
36 void* StackObj::operator new(size_t size) { ShouldNotCallThis(); return 0; }; | |
37 void StackObj::operator delete(void* p) { ShouldNotCallThis(); }; | |
38 void* _ValueObj::operator new(size_t size) { ShouldNotCallThis(); return 0; }; | |
39 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); }; | |
40 | |
41 void* ResourceObj::operator new(size_t size, allocation_type type) { | |
42 address res; | |
43 switch (type) { | |
44 case C_HEAP: | |
45 res = (address)AllocateHeap(size, "C_Heap: ResourceOBJ"); | |
1685 | 46 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
0 | 47 break; |
48 case RESOURCE_AREA: | |
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49 // new(size) sets allocation type RESOURCE_AREA. |
0 | 50 res = (address)operator new(size); |
51 break; | |
52 default: | |
53 ShouldNotReachHere(); | |
54 } | |
55 return res; | |
56 } | |
57 | |
58 void ResourceObj::operator delete(void* p) { | |
59 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
60 "delete only allowed for C_HEAP objects"); | |
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61 DEBUG_ONLY(((ResourceObj *)p)->_allocation = (uintptr_t)badHeapOopVal;) |
0 | 62 FreeHeap(p); |
63 } | |
64 | |
1685 | 65 #ifdef ASSERT |
66 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
67 // Set allocation type in the resource object | |
68 uintptr_t allocation = (uintptr_t)res; | |
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69 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least"); |
1685 | 70 assert(type <= allocation_mask, "incorrect allocation type"); |
71 ((ResourceObj *)res)->_allocation = ~(allocation + type); | |
72 } | |
73 | |
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74 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
1685 | 75 assert(~(_allocation | allocation_mask) == (uintptr_t)this, "lost resource object"); |
76 return (allocation_type)((~_allocation) & allocation_mask); | |
77 } | |
78 | |
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79 ResourceObj::ResourceObj() { // default constructor |
1685 | 80 if (~(_allocation | allocation_mask) != (uintptr_t)this) { |
81 set_allocation_type((address)this, STACK_OR_EMBEDDED); | |
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82 } else if (allocated_on_stack()) { |
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83 // For some reason we got a value which looks like an allocation on stack. |
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84 // Pass if it is really allocated on stack. |
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85 assert(Thread::current()->on_local_stack((address)this),"should be on stack"); |
1685 | 86 } else { |
87 assert(allocated_on_res_area() || allocated_on_C_heap() || allocated_on_arena(), | |
88 "allocation_type should be set by operator new()"); | |
89 } | |
90 } | |
91 | |
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92 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
1685 | 93 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
94 set_allocation_type((address)this, STACK_OR_EMBEDDED); | |
95 } | |
96 | |
97 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
98 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
99 assert(allocated_on_stack(), "copy only into local"); | |
100 // Keep current _allocation value; | |
101 return *this; | |
102 } | |
103 | |
104 ResourceObj::~ResourceObj() { | |
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105 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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106 if (!allocated_on_C_heap()) { // ResourceObj::delete() zaps _allocation for C_heap. |
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107 _allocation = (uintptr_t)badHeapOopVal; // zap type |
1685 | 108 } |
109 } | |
110 #endif // ASSERT | |
111 | |
112 | |
0 | 113 void trace_heap_malloc(size_t size, const char* name, void* p) { |
114 // A lock is not needed here - tty uses a lock internally | |
115 tty->print_cr("Heap malloc " INTPTR_FORMAT " %7d %s", p, size, name == NULL ? "" : name); | |
116 } | |
117 | |
118 | |
119 void trace_heap_free(void* p) { | |
120 // A lock is not needed here - tty uses a lock internally | |
121 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
122 } | |
123 | |
124 bool warn_new_operator = false; // see vm_main | |
125 | |
126 //-------------------------------------------------------------------------------------- | |
127 // ChunkPool implementation | |
128 | |
129 // MT-safe pool of chunks to reduce malloc/free thrashing | |
130 // NB: not using Mutex because pools are used before Threads are initialized | |
131 class ChunkPool { | |
132 Chunk* _first; // first cached Chunk; its first word points to next chunk | |
133 size_t _num_chunks; // number of unused chunks in pool | |
134 size_t _num_used; // number of chunks currently checked out | |
135 const size_t _size; // size of each chunk (must be uniform) | |
136 | |
137 // Our three static pools | |
138 static ChunkPool* _large_pool; | |
139 static ChunkPool* _medium_pool; | |
140 static ChunkPool* _small_pool; | |
141 | |
142 // return first element or null | |
143 void* get_first() { | |
144 Chunk* c = _first; | |
145 if (_first) { | |
146 _first = _first->next(); | |
147 _num_chunks--; | |
148 } | |
149 return c; | |
150 } | |
151 | |
152 public: | |
153 // All chunks in a ChunkPool has the same size | |
154 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
155 | |
156 // Allocate a new chunk from the pool (might expand the pool) | |
157 void* allocate(size_t bytes) { | |
158 assert(bytes == _size, "bad size"); | |
159 void* p = NULL; | |
160 { ThreadCritical tc; | |
161 _num_used++; | |
162 p = get_first(); | |
163 if (p == NULL) p = os::malloc(bytes); | |
164 } | |
165 if (p == NULL) | |
166 vm_exit_out_of_memory(bytes, "ChunkPool::allocate"); | |
167 | |
168 return p; | |
169 } | |
170 | |
171 // Return a chunk to the pool | |
172 void free(Chunk* chunk) { | |
173 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
174 ThreadCritical tc; | |
175 _num_used--; | |
176 | |
177 // Add chunk to list | |
178 chunk->set_next(_first); | |
179 _first = chunk; | |
180 _num_chunks++; | |
181 } | |
182 | |
183 // Prune the pool | |
184 void free_all_but(size_t n) { | |
185 // if we have more than n chunks, free all of them | |
186 ThreadCritical tc; | |
187 if (_num_chunks > n) { | |
188 // free chunks at end of queue, for better locality | |
189 Chunk* cur = _first; | |
190 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); | |
191 | |
192 if (cur != NULL) { | |
193 Chunk* next = cur->next(); | |
194 cur->set_next(NULL); | |
195 cur = next; | |
196 | |
197 // Free all remaining chunks | |
198 while(cur != NULL) { | |
199 next = cur->next(); | |
200 os::free(cur); | |
201 _num_chunks--; | |
202 cur = next; | |
203 } | |
204 } | |
205 } | |
206 } | |
207 | |
208 // Accessors to preallocated pool's | |
209 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
210 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
211 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
212 | |
213 static void initialize() { | |
214 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
215 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
216 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
217 } | |
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218 |
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219 static void clean() { |
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220 enum { BlocksToKeep = 5 }; |
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221 _small_pool->free_all_but(BlocksToKeep); |
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222 _medium_pool->free_all_but(BlocksToKeep); |
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223 _large_pool->free_all_but(BlocksToKeep); |
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224 } |
0 | 225 }; |
226 | |
227 ChunkPool* ChunkPool::_large_pool = NULL; | |
228 ChunkPool* ChunkPool::_medium_pool = NULL; | |
229 ChunkPool* ChunkPool::_small_pool = NULL; | |
230 | |
231 void chunkpool_init() { | |
232 ChunkPool::initialize(); | |
233 } | |
234 | |
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235 void |
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236 Chunk::clean_chunk_pool() { |
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237 ChunkPool::clean(); |
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238 } |
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239 |
0 | 240 |
241 //-------------------------------------------------------------------------------------- | |
242 // ChunkPoolCleaner implementation | |
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243 // |
0 | 244 |
245 class ChunkPoolCleaner : public PeriodicTask { | |
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246 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
0 | 247 |
248 public: | |
249 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
250 void task() { | |
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251 ChunkPool::clean(); |
0 | 252 } |
253 }; | |
254 | |
255 //-------------------------------------------------------------------------------------- | |
256 // Chunk implementation | |
257 | |
258 void* Chunk::operator new(size_t requested_size, size_t length) { | |
259 // requested_size is equal to sizeof(Chunk) but in order for the arena | |
260 // allocations to come out aligned as expected the size must be aligned | |
261 // to expected arean alignment. | |
262 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. | |
263 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
264 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
265 switch (length) { | |
266 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes); | |
267 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes); | |
268 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes); | |
269 default: { | |
270 void *p = os::malloc(bytes); | |
271 if (p == NULL) | |
272 vm_exit_out_of_memory(bytes, "Chunk::new"); | |
273 return p; | |
274 } | |
275 } | |
276 } | |
277 | |
278 void Chunk::operator delete(void* p) { | |
279 Chunk* c = (Chunk*)p; | |
280 switch (c->length()) { | |
281 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
282 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
283 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
284 default: os::free(c); | |
285 } | |
286 } | |
287 | |
288 Chunk::Chunk(size_t length) : _len(length) { | |
289 _next = NULL; // Chain on the linked list | |
290 } | |
291 | |
292 | |
293 void Chunk::chop() { | |
294 Chunk *k = this; | |
295 while( k ) { | |
296 Chunk *tmp = k->next(); | |
297 // clear out this chunk (to detect allocation bugs) | |
298 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
299 delete k; // Free chunk (was malloc'd) | |
300 k = tmp; | |
301 } | |
302 } | |
303 | |
304 void Chunk::next_chop() { | |
305 _next->chop(); | |
306 _next = NULL; | |
307 } | |
308 | |
309 | |
310 void Chunk::start_chunk_pool_cleaner_task() { | |
311 #ifdef ASSERT | |
312 static bool task_created = false; | |
313 assert(!task_created, "should not start chuck pool cleaner twice"); | |
314 task_created = true; | |
315 #endif | |
316 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
317 cleaner->enroll(); | |
318 } | |
319 | |
320 //------------------------------Arena------------------------------------------ | |
321 | |
322 Arena::Arena(size_t init_size) { | |
323 size_t round_size = (sizeof (char *)) - 1; | |
324 init_size = (init_size+round_size) & ~round_size; | |
325 _first = _chunk = new (init_size) Chunk(init_size); | |
326 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
327 _max = _chunk->top(); | |
328 set_size_in_bytes(init_size); | |
329 } | |
330 | |
331 Arena::Arena() { | |
332 _first = _chunk = new (Chunk::init_size) Chunk(Chunk::init_size); | |
333 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
334 _max = _chunk->top(); | |
335 set_size_in_bytes(Chunk::init_size); | |
336 } | |
337 | |
338 Arena::Arena(Arena *a) : _chunk(a->_chunk), _hwm(a->_hwm), _max(a->_max), _first(a->_first) { | |
339 set_size_in_bytes(a->size_in_bytes()); | |
340 } | |
341 | |
342 Arena *Arena::move_contents(Arena *copy) { | |
343 copy->destruct_contents(); | |
344 copy->_chunk = _chunk; | |
345 copy->_hwm = _hwm; | |
346 copy->_max = _max; | |
347 copy->_first = _first; | |
348 copy->set_size_in_bytes(size_in_bytes()); | |
349 // Destroy original arena | |
350 reset(); | |
351 return copy; // Return Arena with contents | |
352 } | |
353 | |
354 Arena::~Arena() { | |
355 destruct_contents(); | |
356 } | |
357 | |
358 // Destroy this arenas contents and reset to empty | |
359 void Arena::destruct_contents() { | |
360 if (UseMallocOnly && _first != NULL) { | |
361 char* end = _first->next() ? _first->top() : _hwm; | |
362 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
363 } | |
364 _first->chop(); | |
365 reset(); | |
366 } | |
367 | |
368 | |
369 // Total of all Chunks in arena | |
370 size_t Arena::used() const { | |
371 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
372 register Chunk *k = _first; | |
373 while( k != _chunk) { // Whilst have Chunks in a row | |
374 sum += k->length(); // Total size of this Chunk | |
375 k = k->next(); // Bump along to next Chunk | |
376 } | |
377 return sum; // Return total consumed space. | |
378 } | |
379 | |
380 | |
381 // Grow a new Chunk | |
382 void* Arena::grow( size_t x ) { | |
383 // Get minimal required size. Either real big, or even bigger for giant objs | |
384 size_t len = MAX2(x, (size_t) Chunk::size); | |
385 | |
386 Chunk *k = _chunk; // Get filled-up chunk address | |
387 _chunk = new (len) Chunk(len); | |
388 | |
389 if (_chunk == NULL) | |
390 vm_exit_out_of_memory(len * Chunk::aligned_overhead_size(), "Arena::grow"); | |
391 | |
392 if (k) k->set_next(_chunk); // Append new chunk to end of linked list | |
393 else _first = _chunk; | |
394 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
395 _max = _chunk->top(); | |
396 set_size_in_bytes(size_in_bytes() + len); | |
397 void* result = _hwm; | |
398 _hwm += x; | |
399 return result; | |
400 } | |
401 | |
402 | |
403 | |
404 // Reallocate storage in Arena. | |
405 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size) { | |
406 assert(new_size >= 0, "bad size"); | |
407 if (new_size == 0) return NULL; | |
408 #ifdef ASSERT | |
409 if (UseMallocOnly) { | |
410 // always allocate a new object (otherwise we'll free this one twice) | |
411 char* copy = (char*)Amalloc(new_size); | |
412 size_t n = MIN2(old_size, new_size); | |
413 if (n > 0) memcpy(copy, old_ptr, n); | |
414 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
415 return copy; | |
416 } | |
417 #endif | |
418 char *c_old = (char*)old_ptr; // Handy name | |
419 // Stupid fast special case | |
420 if( new_size <= old_size ) { // Shrink in-place | |
421 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
422 _hwm = c_old+new_size; // Adjust hwm | |
423 return c_old; | |
424 } | |
425 | |
426 // make sure that new_size is legal | |
427 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
428 | |
429 // See if we can resize in-place | |
430 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
431 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
432 _hwm = c_old+corrected_new_size; // Adjust hwm | |
433 return c_old; // Return old pointer | |
434 } | |
435 | |
436 // Oops, got to relocate guts | |
437 void *new_ptr = Amalloc(new_size); | |
438 memcpy( new_ptr, c_old, old_size ); | |
439 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
440 return new_ptr; | |
441 } | |
442 | |
443 | |
444 // Determine if pointer belongs to this Arena or not. | |
445 bool Arena::contains( const void *ptr ) const { | |
446 #ifdef ASSERT | |
447 if (UseMallocOnly) { | |
448 // really slow, but not easy to make fast | |
449 if (_chunk == NULL) return false; | |
450 char** bottom = (char**)_chunk->bottom(); | |
451 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
452 if (*p == ptr) return true; | |
453 } | |
454 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
455 if (c == _chunk) continue; // current chunk has been processed | |
456 char** bottom = (char**)c->bottom(); | |
457 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
458 if (*p == ptr) return true; | |
459 } | |
460 } | |
461 return false; | |
462 } | |
463 #endif | |
464 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
465 return true; // Check for in this chunk | |
466 for (Chunk *c = _first; c; c = c->next()) { | |
467 if (c == _chunk) continue; // current chunk has been processed | |
468 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
469 return true; // Check for every chunk in Arena | |
470 } | |
471 } | |
472 return false; // Not in any Chunk, so not in Arena | |
473 } | |
474 | |
475 | |
476 #ifdef ASSERT | |
477 void* Arena::malloc(size_t size) { | |
478 assert(UseMallocOnly, "shouldn't call"); | |
479 // use malloc, but save pointer in res. area for later freeing | |
480 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
481 return (*save = (char*)os::malloc(size)); | |
482 } | |
483 | |
484 // for debugging with UseMallocOnly | |
485 void* Arena::internal_malloc_4(size_t x) { | |
486 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
487 if (_hwm + x > _max) { | |
488 return grow(x); | |
489 } else { | |
490 char *old = _hwm; | |
491 _hwm += x; | |
492 return old; | |
493 } | |
494 } | |
495 #endif | |
496 | |
497 | |
498 //-------------------------------------------------------------------------------------- | |
499 // Non-product code | |
500 | |
501 #ifndef PRODUCT | |
502 // The global operator new should never be called since it will usually indicate | |
503 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
504 // that they're allocated on the C heap. | |
505 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
506 // %% note this is causing a problem on solaris debug build. the global | |
507 // new is being called from jdk source and causing data corruption. | |
508 // src/share/native/sun/awt/font/fontmanager/textcache/hsMemory.cpp::hsSoftNew | |
509 // define CATCH_OPERATOR_NEW_USAGE if you want to use this. | |
510 #ifdef CATCH_OPERATOR_NEW_USAGE | |
511 void* operator new(size_t size){ | |
512 static bool warned = false; | |
513 if (!warned && warn_new_operator) | |
514 warning("should not call global (default) operator new"); | |
515 warned = true; | |
516 return (void *) AllocateHeap(size, "global operator new"); | |
517 } | |
518 #endif | |
519 | |
520 void AllocatedObj::print() const { print_on(tty); } | |
521 void AllocatedObj::print_value() const { print_value_on(tty); } | |
522 | |
523 void AllocatedObj::print_on(outputStream* st) const { | |
524 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
525 } | |
526 | |
527 void AllocatedObj::print_value_on(outputStream* st) const { | |
528 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
529 } | |
530 | |
531 size_t Arena::_bytes_allocated = 0; | |
532 | |
533 AllocStats::AllocStats() { | |
534 start_mallocs = os::num_mallocs; | |
535 start_frees = os::num_frees; | |
536 start_malloc_bytes = os::alloc_bytes; | |
537 start_res_bytes = Arena::_bytes_allocated; | |
538 } | |
539 | |
540 int AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } | |
541 size_t AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
542 size_t AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
543 int AllocStats::num_frees() { return os::num_frees - start_frees; } | |
544 void AllocStats::print() { | |
545 tty->print("%d mallocs (%ldK), %d frees, %ldK resrc", | |
546 num_mallocs(), alloc_bytes()/K, num_frees(), resource_bytes()/K); | |
547 } | |
548 | |
549 | |
550 // debugging code | |
551 inline void Arena::free_all(char** start, char** end) { | |
552 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
553 } | |
554 | |
555 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
556 assert(UseMallocOnly, "should not call"); | |
557 // free all objects malloced since resource mark was created; resource area | |
558 // contains their addresses | |
559 if (chunk->next()) { | |
560 // this chunk is full, and some others too | |
561 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
562 char* top = c->top(); | |
563 if (c->next() == NULL) { | |
564 top = hwm2; // last junk is only used up to hwm2 | |
565 assert(c->contains(hwm2), "bad hwm2"); | |
566 } | |
567 free_all((char**)c->bottom(), (char**)top); | |
568 } | |
569 assert(chunk->contains(hwm), "bad hwm"); | |
570 assert(chunk->contains(max), "bad max"); | |
571 free_all((char**)hwm, (char**)max); | |
572 } else { | |
573 // this chunk was partially used | |
574 assert(chunk->contains(hwm), "bad hwm"); | |
575 assert(chunk->contains(hwm2), "bad hwm2"); | |
576 free_all((char**)hwm, (char**)hwm2); | |
577 } | |
578 } | |
579 | |
580 | |
581 ReallocMark::ReallocMark() { | |
582 #ifdef ASSERT | |
583 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
584 _nesting = thread->resource_area()->nesting(); | |
585 #endif | |
586 } | |
587 | |
588 void ReallocMark::check() { | |
589 #ifdef ASSERT | |
590 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
591 fatal("allocation bug: array could grow within nested ResourceMark"); | |
592 } | |
593 #endif | |
594 } | |
595 | |
596 #endif // Non-product |