Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/allocation.cpp @ 1685:0e35fa8ebccd
6973963: SEGV in ciBlock::start_bci() with EA
Summary: Added more checks into ResourceObj and growableArray to verify correctness of allocation type.
Reviewed-by: never, coleenp, dholmes
author | kvn |
---|---|
date | Tue, 03 Aug 2010 15:55:03 -0700 |
parents | c18cbe5936b8 |
children | 2dfd013a7465 |
rev | line source |
---|---|
0 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
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 * | |
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 | |
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: | |
1685 | 49 // Will set allocation type in the resource object. |
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"); | |
1685 | 61 DEBUG_ONLY(((ResourceObj *)p)->_allocation = 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; | |
69 assert((allocation & allocation_mask) == 0, "address should be aligned ot 4 bytes at least"); | |
70 assert(type <= allocation_mask, "incorrect allocation type"); | |
71 ((ResourceObj *)res)->_allocation = ~(allocation + type); | |
72 } | |
73 | |
74 ResourceObj::allocation_type ResourceObj::get_allocation_type() { | |
75 assert(~(_allocation | allocation_mask) == (uintptr_t)this, "lost resource object"); | |
76 return (allocation_type)((~_allocation) & allocation_mask); | |
77 } | |
78 | |
79 ResourceObj::ResourceObj() { // default construtor | |
80 if (~(_allocation | allocation_mask) != (uintptr_t)this) { | |
81 set_allocation_type((address)this, STACK_OR_EMBEDDED); | |
82 } else { | |
83 assert(allocated_on_res_area() || allocated_on_C_heap() || allocated_on_arena(), | |
84 "allocation_type should be set by operator new()"); | |
85 } | |
86 } | |
87 | |
88 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy construtor | |
89 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. | |
90 set_allocation_type((address)this, STACK_OR_EMBEDDED); | |
91 } | |
92 | |
93 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
94 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
95 assert(allocated_on_stack(), "copy only into local"); | |
96 // Keep current _allocation value; | |
97 return *this; | |
98 } | |
99 | |
100 ResourceObj::~ResourceObj() { | |
101 if (!allocated_on_C_heap()) { // operator delete() checks C_heap allocation_type. | |
102 _allocation = badHeapOopVal; | |
103 } | |
104 } | |
105 #endif // ASSERT | |
106 | |
107 | |
0 | 108 void trace_heap_malloc(size_t size, const char* name, void* p) { |
109 // A lock is not needed here - tty uses a lock internally | |
110 tty->print_cr("Heap malloc " INTPTR_FORMAT " %7d %s", p, size, name == NULL ? "" : name); | |
111 } | |
112 | |
113 | |
114 void trace_heap_free(void* p) { | |
115 // A lock is not needed here - tty uses a lock internally | |
116 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
117 } | |
118 | |
119 bool warn_new_operator = false; // see vm_main | |
120 | |
121 //-------------------------------------------------------------------------------------- | |
122 // ChunkPool implementation | |
123 | |
124 // MT-safe pool of chunks to reduce malloc/free thrashing | |
125 // NB: not using Mutex because pools are used before Threads are initialized | |
126 class ChunkPool { | |
127 Chunk* _first; // first cached Chunk; its first word points to next chunk | |
128 size_t _num_chunks; // number of unused chunks in pool | |
129 size_t _num_used; // number of chunks currently checked out | |
130 const size_t _size; // size of each chunk (must be uniform) | |
131 | |
132 // Our three static pools | |
133 static ChunkPool* _large_pool; | |
134 static ChunkPool* _medium_pool; | |
135 static ChunkPool* _small_pool; | |
136 | |
137 // return first element or null | |
138 void* get_first() { | |
139 Chunk* c = _first; | |
140 if (_first) { | |
141 _first = _first->next(); | |
142 _num_chunks--; | |
143 } | |
144 return c; | |
145 } | |
146 | |
147 public: | |
148 // All chunks in a ChunkPool has the same size | |
149 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
150 | |
151 // Allocate a new chunk from the pool (might expand the pool) | |
152 void* allocate(size_t bytes) { | |
153 assert(bytes == _size, "bad size"); | |
154 void* p = NULL; | |
155 { ThreadCritical tc; | |
156 _num_used++; | |
157 p = get_first(); | |
158 if (p == NULL) p = os::malloc(bytes); | |
159 } | |
160 if (p == NULL) | |
161 vm_exit_out_of_memory(bytes, "ChunkPool::allocate"); | |
162 | |
163 return p; | |
164 } | |
165 | |
166 // Return a chunk to the pool | |
167 void free(Chunk* chunk) { | |
168 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
169 ThreadCritical tc; | |
170 _num_used--; | |
171 | |
172 // Add chunk to list | |
173 chunk->set_next(_first); | |
174 _first = chunk; | |
175 _num_chunks++; | |
176 } | |
177 | |
178 // Prune the pool | |
179 void free_all_but(size_t n) { | |
180 // if we have more than n chunks, free all of them | |
181 ThreadCritical tc; | |
182 if (_num_chunks > n) { | |
183 // free chunks at end of queue, for better locality | |
184 Chunk* cur = _first; | |
185 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); | |
186 | |
187 if (cur != NULL) { | |
188 Chunk* next = cur->next(); | |
189 cur->set_next(NULL); | |
190 cur = next; | |
191 | |
192 // Free all remaining chunks | |
193 while(cur != NULL) { | |
194 next = cur->next(); | |
195 os::free(cur); | |
196 _num_chunks--; | |
197 cur = next; | |
198 } | |
199 } | |
200 } | |
201 } | |
202 | |
203 // Accessors to preallocated pool's | |
204 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
205 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
206 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
207 | |
208 static void initialize() { | |
209 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
210 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
211 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
212 } | |
213 }; | |
214 | |
215 ChunkPool* ChunkPool::_large_pool = NULL; | |
216 ChunkPool* ChunkPool::_medium_pool = NULL; | |
217 ChunkPool* ChunkPool::_small_pool = NULL; | |
218 | |
219 | |
220 void chunkpool_init() { | |
221 ChunkPool::initialize(); | |
222 } | |
223 | |
224 | |
225 //-------------------------------------------------------------------------------------- | |
226 // ChunkPoolCleaner implementation | |
227 | |
228 class ChunkPoolCleaner : public PeriodicTask { | |
229 enum { CleaningInterval = 5000, // cleaning interval in ms | |
230 BlocksToKeep = 5 // # of extra blocks to keep | |
231 }; | |
232 | |
233 public: | |
234 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
235 void task() { | |
236 ChunkPool::small_pool()->free_all_but(BlocksToKeep); | |
237 ChunkPool::medium_pool()->free_all_but(BlocksToKeep); | |
238 ChunkPool::large_pool()->free_all_but(BlocksToKeep); | |
239 } | |
240 }; | |
241 | |
242 //-------------------------------------------------------------------------------------- | |
243 // Chunk implementation | |
244 | |
245 void* Chunk::operator new(size_t requested_size, size_t length) { | |
246 // requested_size is equal to sizeof(Chunk) but in order for the arena | |
247 // allocations to come out aligned as expected the size must be aligned | |
248 // to expected arean alignment. | |
249 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. | |
250 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
251 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
252 switch (length) { | |
253 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes); | |
254 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes); | |
255 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes); | |
256 default: { | |
257 void *p = os::malloc(bytes); | |
258 if (p == NULL) | |
259 vm_exit_out_of_memory(bytes, "Chunk::new"); | |
260 return p; | |
261 } | |
262 } | |
263 } | |
264 | |
265 void Chunk::operator delete(void* p) { | |
266 Chunk* c = (Chunk*)p; | |
267 switch (c->length()) { | |
268 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
269 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
270 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
271 default: os::free(c); | |
272 } | |
273 } | |
274 | |
275 Chunk::Chunk(size_t length) : _len(length) { | |
276 _next = NULL; // Chain on the linked list | |
277 } | |
278 | |
279 | |
280 void Chunk::chop() { | |
281 Chunk *k = this; | |
282 while( k ) { | |
283 Chunk *tmp = k->next(); | |
284 // clear out this chunk (to detect allocation bugs) | |
285 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
286 delete k; // Free chunk (was malloc'd) | |
287 k = tmp; | |
288 } | |
289 } | |
290 | |
291 void Chunk::next_chop() { | |
292 _next->chop(); | |
293 _next = NULL; | |
294 } | |
295 | |
296 | |
297 void Chunk::start_chunk_pool_cleaner_task() { | |
298 #ifdef ASSERT | |
299 static bool task_created = false; | |
300 assert(!task_created, "should not start chuck pool cleaner twice"); | |
301 task_created = true; | |
302 #endif | |
303 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
304 cleaner->enroll(); | |
305 } | |
306 | |
307 //------------------------------Arena------------------------------------------ | |
308 | |
309 Arena::Arena(size_t init_size) { | |
310 size_t round_size = (sizeof (char *)) - 1; | |
311 init_size = (init_size+round_size) & ~round_size; | |
312 _first = _chunk = new (init_size) Chunk(init_size); | |
313 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
314 _max = _chunk->top(); | |
315 set_size_in_bytes(init_size); | |
316 } | |
317 | |
318 Arena::Arena() { | |
319 _first = _chunk = new (Chunk::init_size) Chunk(Chunk::init_size); | |
320 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
321 _max = _chunk->top(); | |
322 set_size_in_bytes(Chunk::init_size); | |
323 } | |
324 | |
325 Arena::Arena(Arena *a) : _chunk(a->_chunk), _hwm(a->_hwm), _max(a->_max), _first(a->_first) { | |
326 set_size_in_bytes(a->size_in_bytes()); | |
327 } | |
328 | |
329 Arena *Arena::move_contents(Arena *copy) { | |
330 copy->destruct_contents(); | |
331 copy->_chunk = _chunk; | |
332 copy->_hwm = _hwm; | |
333 copy->_max = _max; | |
334 copy->_first = _first; | |
335 copy->set_size_in_bytes(size_in_bytes()); | |
336 // Destroy original arena | |
337 reset(); | |
338 return copy; // Return Arena with contents | |
339 } | |
340 | |
341 Arena::~Arena() { | |
342 destruct_contents(); | |
343 } | |
344 | |
345 // Destroy this arenas contents and reset to empty | |
346 void Arena::destruct_contents() { | |
347 if (UseMallocOnly && _first != NULL) { | |
348 char* end = _first->next() ? _first->top() : _hwm; | |
349 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
350 } | |
351 _first->chop(); | |
352 reset(); | |
353 } | |
354 | |
355 | |
356 // Total of all Chunks in arena | |
357 size_t Arena::used() const { | |
358 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
359 register Chunk *k = _first; | |
360 while( k != _chunk) { // Whilst have Chunks in a row | |
361 sum += k->length(); // Total size of this Chunk | |
362 k = k->next(); // Bump along to next Chunk | |
363 } | |
364 return sum; // Return total consumed space. | |
365 } | |
366 | |
367 | |
368 // Grow a new Chunk | |
369 void* Arena::grow( size_t x ) { | |
370 // Get minimal required size. Either real big, or even bigger for giant objs | |
371 size_t len = MAX2(x, (size_t) Chunk::size); | |
372 | |
373 Chunk *k = _chunk; // Get filled-up chunk address | |
374 _chunk = new (len) Chunk(len); | |
375 | |
376 if (_chunk == NULL) | |
377 vm_exit_out_of_memory(len * Chunk::aligned_overhead_size(), "Arena::grow"); | |
378 | |
379 if (k) k->set_next(_chunk); // Append new chunk to end of linked list | |
380 else _first = _chunk; | |
381 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
382 _max = _chunk->top(); | |
383 set_size_in_bytes(size_in_bytes() + len); | |
384 void* result = _hwm; | |
385 _hwm += x; | |
386 return result; | |
387 } | |
388 | |
389 | |
390 | |
391 // Reallocate storage in Arena. | |
392 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size) { | |
393 assert(new_size >= 0, "bad size"); | |
394 if (new_size == 0) return NULL; | |
395 #ifdef ASSERT | |
396 if (UseMallocOnly) { | |
397 // always allocate a new object (otherwise we'll free this one twice) | |
398 char* copy = (char*)Amalloc(new_size); | |
399 size_t n = MIN2(old_size, new_size); | |
400 if (n > 0) memcpy(copy, old_ptr, n); | |
401 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
402 return copy; | |
403 } | |
404 #endif | |
405 char *c_old = (char*)old_ptr; // Handy name | |
406 // Stupid fast special case | |
407 if( new_size <= old_size ) { // Shrink in-place | |
408 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
409 _hwm = c_old+new_size; // Adjust hwm | |
410 return c_old; | |
411 } | |
412 | |
413 // make sure that new_size is legal | |
414 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
415 | |
416 // See if we can resize in-place | |
417 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
418 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
419 _hwm = c_old+corrected_new_size; // Adjust hwm | |
420 return c_old; // Return old pointer | |
421 } | |
422 | |
423 // Oops, got to relocate guts | |
424 void *new_ptr = Amalloc(new_size); | |
425 memcpy( new_ptr, c_old, old_size ); | |
426 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
427 return new_ptr; | |
428 } | |
429 | |
430 | |
431 // Determine if pointer belongs to this Arena or not. | |
432 bool Arena::contains( const void *ptr ) const { | |
433 #ifdef ASSERT | |
434 if (UseMallocOnly) { | |
435 // really slow, but not easy to make fast | |
436 if (_chunk == NULL) return false; | |
437 char** bottom = (char**)_chunk->bottom(); | |
438 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
439 if (*p == ptr) return true; | |
440 } | |
441 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
442 if (c == _chunk) continue; // current chunk has been processed | |
443 char** bottom = (char**)c->bottom(); | |
444 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
445 if (*p == ptr) return true; | |
446 } | |
447 } | |
448 return false; | |
449 } | |
450 #endif | |
451 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
452 return true; // Check for in this chunk | |
453 for (Chunk *c = _first; c; c = c->next()) { | |
454 if (c == _chunk) continue; // current chunk has been processed | |
455 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
456 return true; // Check for every chunk in Arena | |
457 } | |
458 } | |
459 return false; // Not in any Chunk, so not in Arena | |
460 } | |
461 | |
462 | |
463 #ifdef ASSERT | |
464 void* Arena::malloc(size_t size) { | |
465 assert(UseMallocOnly, "shouldn't call"); | |
466 // use malloc, but save pointer in res. area for later freeing | |
467 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
468 return (*save = (char*)os::malloc(size)); | |
469 } | |
470 | |
471 // for debugging with UseMallocOnly | |
472 void* Arena::internal_malloc_4(size_t x) { | |
473 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
474 if (_hwm + x > _max) { | |
475 return grow(x); | |
476 } else { | |
477 char *old = _hwm; | |
478 _hwm += x; | |
479 return old; | |
480 } | |
481 } | |
482 #endif | |
483 | |
484 | |
485 //-------------------------------------------------------------------------------------- | |
486 // Non-product code | |
487 | |
488 #ifndef PRODUCT | |
489 // The global operator new should never be called since it will usually indicate | |
490 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
491 // that they're allocated on the C heap. | |
492 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
493 // %% note this is causing a problem on solaris debug build. the global | |
494 // new is being called from jdk source and causing data corruption. | |
495 // src/share/native/sun/awt/font/fontmanager/textcache/hsMemory.cpp::hsSoftNew | |
496 // define CATCH_OPERATOR_NEW_USAGE if you want to use this. | |
497 #ifdef CATCH_OPERATOR_NEW_USAGE | |
498 void* operator new(size_t size){ | |
499 static bool warned = false; | |
500 if (!warned && warn_new_operator) | |
501 warning("should not call global (default) operator new"); | |
502 warned = true; | |
503 return (void *) AllocateHeap(size, "global operator new"); | |
504 } | |
505 #endif | |
506 | |
507 void AllocatedObj::print() const { print_on(tty); } | |
508 void AllocatedObj::print_value() const { print_value_on(tty); } | |
509 | |
510 void AllocatedObj::print_on(outputStream* st) const { | |
511 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
512 } | |
513 | |
514 void AllocatedObj::print_value_on(outputStream* st) const { | |
515 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
516 } | |
517 | |
518 size_t Arena::_bytes_allocated = 0; | |
519 | |
520 AllocStats::AllocStats() { | |
521 start_mallocs = os::num_mallocs; | |
522 start_frees = os::num_frees; | |
523 start_malloc_bytes = os::alloc_bytes; | |
524 start_res_bytes = Arena::_bytes_allocated; | |
525 } | |
526 | |
527 int AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } | |
528 size_t AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
529 size_t AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
530 int AllocStats::num_frees() { return os::num_frees - start_frees; } | |
531 void AllocStats::print() { | |
532 tty->print("%d mallocs (%ldK), %d frees, %ldK resrc", | |
533 num_mallocs(), alloc_bytes()/K, num_frees(), resource_bytes()/K); | |
534 } | |
535 | |
536 | |
537 // debugging code | |
538 inline void Arena::free_all(char** start, char** end) { | |
539 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
540 } | |
541 | |
542 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
543 assert(UseMallocOnly, "should not call"); | |
544 // free all objects malloced since resource mark was created; resource area | |
545 // contains their addresses | |
546 if (chunk->next()) { | |
547 // this chunk is full, and some others too | |
548 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
549 char* top = c->top(); | |
550 if (c->next() == NULL) { | |
551 top = hwm2; // last junk is only used up to hwm2 | |
552 assert(c->contains(hwm2), "bad hwm2"); | |
553 } | |
554 free_all((char**)c->bottom(), (char**)top); | |
555 } | |
556 assert(chunk->contains(hwm), "bad hwm"); | |
557 assert(chunk->contains(max), "bad max"); | |
558 free_all((char**)hwm, (char**)max); | |
559 } else { | |
560 // this chunk was partially used | |
561 assert(chunk->contains(hwm), "bad hwm"); | |
562 assert(chunk->contains(hwm2), "bad hwm2"); | |
563 free_all((char**)hwm, (char**)hwm2); | |
564 } | |
565 } | |
566 | |
567 | |
568 ReallocMark::ReallocMark() { | |
569 #ifdef ASSERT | |
570 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
571 _nesting = thread->resource_area()->nesting(); | |
572 #endif | |
573 } | |
574 | |
575 void ReallocMark::check() { | |
576 #ifdef ASSERT | |
577 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
578 fatal("allocation bug: array could grow within nested ResourceMark"); | |
579 } | |
580 #endif | |
581 } | |
582 | |
583 #endif // Non-product |