Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 1905:ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
Reviewed-by: kvn, twisti
author | never |
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date | Tue, 19 Oct 2010 16:14:34 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2009, 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 | |
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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). | |
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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 // Inline allocation implementations. | |
26 | |
27 void CollectedHeap::post_allocation_setup_common(KlassHandle klass, | |
28 HeapWord* obj, | |
29 size_t size) { | |
30 post_allocation_setup_no_klass_install(klass, obj, size); | |
31 post_allocation_install_obj_klass(klass, oop(obj), (int) size); | |
32 } | |
33 | |
34 void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, | |
35 HeapWord* objPtr, | |
36 size_t size) { | |
37 oop obj = (oop)objPtr; | |
38 | |
39 assert(obj != NULL, "NULL object pointer"); | |
40 if (UseBiasedLocking && (klass() != NULL)) { | |
41 obj->set_mark(klass->prototype_header()); | |
42 } else { | |
43 // May be bootstrapping | |
44 obj->set_mark(markOopDesc::prototype()); | |
45 } | |
46 } | |
47 | |
48 void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, | |
49 oop obj, | |
50 int size) { | |
51 // These asserts are kind of complicated because of klassKlass | |
52 // and the beginning of the world. | |
53 assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); | |
54 assert(klass() == NULL || klass()->is_klass(), "not a klass"); | |
55 assert(klass() == NULL || klass()->klass_part() != NULL, "not a klass"); | |
56 assert(obj != NULL, "NULL object pointer"); | |
57 obj->set_klass(klass()); | |
58 assert(!Universe::is_fully_initialized() || obj->blueprint() != NULL, | |
59 "missing blueprint"); | |
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60 } |
0 | 61 |
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62 // Support for jvmti and dtrace |
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63 inline void post_allocation_notify(KlassHandle klass, oop obj) { |
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64 // support low memory notifications (no-op if not enabled) |
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65 LowMemoryDetector::detect_low_memory_for_collected_pools(); |
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66 |
0 | 67 // support for JVMTI VMObjectAlloc event (no-op if not enabled) |
68 JvmtiExport::vm_object_alloc_event_collector(obj); | |
69 | |
70 if (DTraceAllocProbes) { | |
71 // support for Dtrace object alloc event (no-op most of the time) | |
72 if (klass() != NULL && klass()->klass_part()->name() != NULL) { | |
73 SharedRuntime::dtrace_object_alloc(obj); | |
74 } | |
75 } | |
76 } | |
77 | |
78 void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, | |
79 HeapWord* obj, | |
80 size_t size) { | |
81 post_allocation_setup_common(klass, obj, size); | |
82 assert(Universe::is_bootstrapping() || | |
83 !((oop)obj)->blueprint()->oop_is_array(), "must not be an array"); | |
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84 // notify jvmti and dtrace |
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85 post_allocation_notify(klass, (oop)obj); |
0 | 86 } |
87 | |
88 void CollectedHeap::post_allocation_setup_array(KlassHandle klass, | |
89 HeapWord* obj, | |
90 size_t size, | |
91 int length) { | |
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92 // Set array length before setting the _klass field |
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93 // in post_allocation_setup_common() because the klass field |
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94 // indicates that the object is parsable by concurrent GC. |
0 | 95 assert(length >= 0, "length should be non-negative"); |
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96 ((arrayOop)obj)->set_length(length); |
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97 post_allocation_setup_common(klass, obj, size); |
0 | 98 assert(((oop)obj)->blueprint()->oop_is_array(), "must be an array"); |
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99 // notify jvmti and dtrace (must be after length is set for dtrace) |
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100 post_allocation_notify(klass, (oop)obj); |
0 | 101 } |
102 | |
103 HeapWord* CollectedHeap::common_mem_allocate_noinit(size_t size, bool is_noref, TRAPS) { | |
104 | |
105 // Clear unhandled oops for memory allocation. Memory allocation might | |
106 // not take out a lock if from tlab, so clear here. | |
107 CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) | |
108 | |
109 if (HAS_PENDING_EXCEPTION) { | |
110 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
111 return NULL; // caller does a CHECK_0 too | |
112 } | |
113 | |
114 // We may want to update this, is_noref objects might not be allocated in TLABs. | |
115 HeapWord* result = NULL; | |
116 if (UseTLAB) { | |
117 result = CollectedHeap::allocate_from_tlab(THREAD, size); | |
118 if (result != NULL) { | |
119 assert(!HAS_PENDING_EXCEPTION, | |
120 "Unexpected exception, will result in uninitialized storage"); | |
121 return result; | |
122 } | |
123 } | |
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124 bool gc_overhead_limit_was_exceeded = false; |
0 | 125 result = Universe::heap()->mem_allocate(size, |
126 is_noref, | |
127 false, | |
128 &gc_overhead_limit_was_exceeded); | |
129 if (result != NULL) { | |
130 NOT_PRODUCT(Universe::heap()-> | |
131 check_for_non_bad_heap_word_value(result, size)); | |
132 assert(!HAS_PENDING_EXCEPTION, | |
133 "Unexpected exception, will result in uninitialized storage"); | |
134 return result; | |
135 } | |
136 | |
137 | |
138 if (!gc_overhead_limit_was_exceeded) { | |
139 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
140 report_java_out_of_memory("Java heap space"); | |
141 | |
142 if (JvmtiExport::should_post_resource_exhausted()) { | |
143 JvmtiExport::post_resource_exhausted( | |
144 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
145 "Java heap space"); | |
146 } | |
147 | |
148 THROW_OOP_0(Universe::out_of_memory_error_java_heap()); | |
149 } else { | |
150 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
151 report_java_out_of_memory("GC overhead limit exceeded"); | |
152 | |
153 if (JvmtiExport::should_post_resource_exhausted()) { | |
154 JvmtiExport::post_resource_exhausted( | |
155 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
156 "GC overhead limit exceeded"); | |
157 } | |
158 | |
159 THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); | |
160 } | |
161 } | |
162 | |
163 HeapWord* CollectedHeap::common_mem_allocate_init(size_t size, bool is_noref, TRAPS) { | |
164 HeapWord* obj = common_mem_allocate_noinit(size, is_noref, CHECK_NULL); | |
165 init_obj(obj, size); | |
166 return obj; | |
167 } | |
168 | |
169 // Need to investigate, do we really want to throw OOM exception here? | |
170 HeapWord* CollectedHeap::common_permanent_mem_allocate_noinit(size_t size, TRAPS) { | |
171 if (HAS_PENDING_EXCEPTION) { | |
172 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
173 return NULL; // caller does a CHECK_NULL too | |
174 } | |
175 | |
176 #ifdef ASSERT | |
177 if (CIFireOOMAt > 0 && THREAD->is_Compiler_thread() && | |
178 ++_fire_out_of_memory_count >= CIFireOOMAt) { | |
179 // For testing of OOM handling in the CI throw an OOM and see how | |
180 // it does. Historically improper handling of these has resulted | |
181 // in crashes which we really don't want to have in the CI. | |
182 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); | |
183 } | |
184 #endif | |
185 | |
186 HeapWord* result = Universe::heap()->permanent_mem_allocate(size); | |
187 if (result != NULL) { | |
188 NOT_PRODUCT(Universe::heap()-> | |
189 check_for_non_bad_heap_word_value(result, size)); | |
190 assert(!HAS_PENDING_EXCEPTION, | |
191 "Unexpected exception, will result in uninitialized storage"); | |
192 return result; | |
193 } | |
194 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
195 report_java_out_of_memory("PermGen space"); | |
196 | |
197 if (JvmtiExport::should_post_resource_exhausted()) { | |
198 JvmtiExport::post_resource_exhausted( | |
199 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, | |
200 "PermGen space"); | |
201 } | |
202 | |
203 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); | |
204 } | |
205 | |
206 HeapWord* CollectedHeap::common_permanent_mem_allocate_init(size_t size, TRAPS) { | |
207 HeapWord* obj = common_permanent_mem_allocate_noinit(size, CHECK_NULL); | |
208 init_obj(obj, size); | |
209 return obj; | |
210 } | |
211 | |
212 HeapWord* CollectedHeap::allocate_from_tlab(Thread* thread, size_t size) { | |
213 assert(UseTLAB, "should use UseTLAB"); | |
214 | |
215 HeapWord* obj = thread->tlab().allocate(size); | |
216 if (obj != NULL) { | |
217 return obj; | |
218 } | |
219 // Otherwise... | |
220 return allocate_from_tlab_slow(thread, size); | |
221 } | |
222 | |
223 void CollectedHeap::init_obj(HeapWord* obj, size_t size) { | |
224 assert(obj != NULL, "cannot initialize NULL object"); | |
225 const size_t hs = oopDesc::header_size(); | |
226 assert(size >= hs, "unexpected object size"); | |
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227 ((oop)obj)->set_klass_gap(0); |
0 | 228 Copy::fill_to_aligned_words(obj + hs, size - hs); |
229 } | |
230 | |
231 oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { | |
232 debug_only(check_for_valid_allocation_state()); | |
233 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
234 assert(size >= 0, "int won't convert to size_t"); | |
235 HeapWord* obj = common_mem_allocate_init(size, false, CHECK_NULL); | |
236 post_allocation_setup_obj(klass, obj, size); | |
237 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
238 return (oop)obj; | |
239 } | |
240 | |
241 oop CollectedHeap::array_allocate(KlassHandle klass, | |
242 int size, | |
243 int length, | |
244 TRAPS) { | |
245 debug_only(check_for_valid_allocation_state()); | |
246 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
247 assert(size >= 0, "int won't convert to size_t"); | |
248 HeapWord* obj = common_mem_allocate_init(size, false, CHECK_NULL); | |
249 post_allocation_setup_array(klass, obj, size, length); | |
250 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
251 return (oop)obj; | |
252 } | |
253 | |
254 oop CollectedHeap::large_typearray_allocate(KlassHandle klass, | |
255 int size, | |
256 int length, | |
257 TRAPS) { | |
258 debug_only(check_for_valid_allocation_state()); | |
259 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
260 assert(size >= 0, "int won't convert to size_t"); | |
261 HeapWord* obj = common_mem_allocate_init(size, true, CHECK_NULL); | |
262 post_allocation_setup_array(klass, obj, size, length); | |
263 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
264 return (oop)obj; | |
265 } | |
266 | |
267 oop CollectedHeap::permanent_obj_allocate(KlassHandle klass, int size, TRAPS) { | |
268 oop obj = permanent_obj_allocate_no_klass_install(klass, size, CHECK_NULL); | |
269 post_allocation_install_obj_klass(klass, obj, size); | |
270 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value((HeapWord*) obj, | |
271 size)); | |
272 return obj; | |
273 } | |
274 | |
275 oop CollectedHeap::permanent_obj_allocate_no_klass_install(KlassHandle klass, | |
276 int size, | |
277 TRAPS) { | |
278 debug_only(check_for_valid_allocation_state()); | |
279 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
280 assert(size >= 0, "int won't convert to size_t"); | |
281 HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
282 post_allocation_setup_no_klass_install(klass, obj, size); | |
283 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
284 return (oop)obj; | |
285 } | |
286 | |
287 oop CollectedHeap::permanent_array_allocate(KlassHandle klass, | |
288 int size, | |
289 int length, | |
290 TRAPS) { | |
291 debug_only(check_for_valid_allocation_state()); | |
292 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
293 assert(size >= 0, "int won't convert to size_t"); | |
294 HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
295 post_allocation_setup_array(klass, obj, size, length); | |
296 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
297 return (oop)obj; | |
298 } | |
299 | |
300 // Returns "TRUE" if "p" is a method oop in the | |
301 // current heap with high probability. NOTE: The main | |
302 // current consumers of this interface are Forte:: | |
303 // and ThreadProfiler::. In these cases, the | |
304 // interpreter frame from which "p" came, may be | |
305 // under construction when sampled asynchronously, so | |
306 // the clients want to check that it represents a | |
307 // valid method before using it. Nonetheless since | |
308 // the clients do not typically lock out GC, the | |
309 // predicate is_valid_method() is not stable, so | |
310 // it is possible that by the time "p" is used, it | |
311 // is no longer valid. | |
312 inline bool CollectedHeap::is_valid_method(oop p) const { | |
313 return | |
314 p != NULL && | |
315 | |
316 // Check whether it is aligned at a HeapWord boundary. | |
317 Space::is_aligned(p) && | |
318 | |
319 // Check whether "method" is in the allocated part of the | |
320 // permanent generation -- this needs to be checked before | |
321 // p->klass() below to avoid a SEGV (but see below | |
322 // for a potential window of vulnerability). | |
323 is_permanent((void*)p) && | |
324 | |
325 // See if GC is active; however, there is still an | |
326 // apparently unavoidable window after this call | |
327 // and before the client of this interface uses "p". | |
328 // If the client chooses not to lock out GC, then | |
329 // it's a risk the client must accept. | |
330 !is_gc_active() && | |
331 | |
332 // Check that p is a methodOop. | |
333 p->klass() == Universe::methodKlassObj(); | |
334 } | |
335 | |
336 | |
337 #ifndef PRODUCT | |
338 | |
339 inline bool | |
340 CollectedHeap::promotion_should_fail(volatile size_t* count) { | |
341 // Access to count is not atomic; the value does not have to be exact. | |
342 if (PromotionFailureALot) { | |
343 const size_t gc_num = total_collections(); | |
344 const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; | |
345 if (elapsed_gcs >= PromotionFailureALotInterval) { | |
346 // Test for unsigned arithmetic wrap-around. | |
347 if (++*count >= PromotionFailureALotCount) { | |
348 *count = 0; | |
349 return true; | |
350 } | |
351 } | |
352 } | |
353 return false; | |
354 } | |
355 | |
356 inline bool CollectedHeap::promotion_should_fail() { | |
357 return promotion_should_fail(&_promotion_failure_alot_count); | |
358 } | |
359 | |
360 inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { | |
361 if (PromotionFailureALot) { | |
362 _promotion_failure_alot_gc_number = total_collections(); | |
363 *count = 0; | |
364 } | |
365 } | |
366 | |
367 inline void CollectedHeap::reset_promotion_should_fail() { | |
368 reset_promotion_should_fail(&_promotion_failure_alot_count); | |
369 } | |
370 #endif // #ifndef PRODUCT |