Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 4851:a42c07c38c47
7132515: Add dcmd to manage UnlockingCommercialFeature flag
Summary: Added dcmd to unlock or check status of UnlockingCommercialFeature flag
Reviewed-by: fparain, rottenha
author | dsamersoff |
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date | Wed, 25 Jan 2012 21:10:08 +0400 |
parents | a92cdbac8b9e |
children | 9a9bb0010c91 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2011, 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 #ifndef SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |
26 #define SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP | |
27 | |
28 #include "gc_interface/collectedHeap.hpp" | |
29 #include "memory/threadLocalAllocBuffer.inline.hpp" | |
30 #include "memory/universe.hpp" | |
31 #include "oops/arrayOop.hpp" | |
32 #include "prims/jvmtiExport.hpp" | |
33 #include "runtime/sharedRuntime.hpp" | |
34 #include "runtime/thread.hpp" | |
35 #include "services/lowMemoryDetector.hpp" | |
36 #include "utilities/copy.hpp" | |
37 #ifdef TARGET_OS_FAMILY_linux | |
38 # include "thread_linux.inline.hpp" | |
39 #endif | |
40 #ifdef TARGET_OS_FAMILY_solaris | |
41 # include "thread_solaris.inline.hpp" | |
42 #endif | |
43 #ifdef TARGET_OS_FAMILY_windows | |
44 # include "thread_windows.inline.hpp" | |
45 #endif | |
3960 | 46 #ifdef TARGET_OS_FAMILY_bsd |
47 # include "thread_bsd.inline.hpp" | |
48 #endif | |
1972 | 49 |
0 | 50 // Inline allocation implementations. |
51 | |
52 void CollectedHeap::post_allocation_setup_common(KlassHandle klass, | |
53 HeapWord* obj, | |
54 size_t size) { | |
55 post_allocation_setup_no_klass_install(klass, obj, size); | |
56 post_allocation_install_obj_klass(klass, oop(obj), (int) size); | |
57 } | |
58 | |
59 void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, | |
60 HeapWord* objPtr, | |
61 size_t size) { | |
62 oop obj = (oop)objPtr; | |
63 | |
64 assert(obj != NULL, "NULL object pointer"); | |
65 if (UseBiasedLocking && (klass() != NULL)) { | |
66 obj->set_mark(klass->prototype_header()); | |
67 } else { | |
68 // May be bootstrapping | |
69 obj->set_mark(markOopDesc::prototype()); | |
70 } | |
71 } | |
72 | |
73 void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, | |
74 oop obj, | |
75 int size) { | |
76 // These asserts are kind of complicated because of klassKlass | |
77 // and the beginning of the world. | |
78 assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); | |
79 assert(klass() == NULL || klass()->is_klass(), "not a klass"); | |
80 assert(klass() == NULL || klass()->klass_part() != NULL, "not a klass"); | |
81 assert(obj != NULL, "NULL object pointer"); | |
82 obj->set_klass(klass()); | |
83 assert(!Universe::is_fully_initialized() || obj->blueprint() != NULL, | |
84 "missing blueprint"); | |
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85 } |
0 | 86 |
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87 // Support for jvmti and dtrace |
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88 inline void post_allocation_notify(KlassHandle klass, oop obj) { |
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89 // support low memory notifications (no-op if not enabled) |
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90 LowMemoryDetector::detect_low_memory_for_collected_pools(); |
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91 |
0 | 92 // support for JVMTI VMObjectAlloc event (no-op if not enabled) |
93 JvmtiExport::vm_object_alloc_event_collector(obj); | |
94 | |
95 if (DTraceAllocProbes) { | |
96 // support for Dtrace object alloc event (no-op most of the time) | |
97 if (klass() != NULL && klass()->klass_part()->name() != NULL) { | |
98 SharedRuntime::dtrace_object_alloc(obj); | |
99 } | |
100 } | |
101 } | |
102 | |
103 void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, | |
104 HeapWord* obj, | |
105 size_t size) { | |
106 post_allocation_setup_common(klass, obj, size); | |
107 assert(Universe::is_bootstrapping() || | |
108 !((oop)obj)->blueprint()->oop_is_array(), "must not be an array"); | |
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109 // notify jvmti and dtrace |
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110 post_allocation_notify(klass, (oop)obj); |
0 | 111 } |
112 | |
113 void CollectedHeap::post_allocation_setup_array(KlassHandle klass, | |
114 HeapWord* obj, | |
115 size_t size, | |
116 int length) { | |
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117 // Set array length before setting the _klass field |
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118 // in post_allocation_setup_common() because the klass field |
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119 // indicates that the object is parsable by concurrent GC. |
0 | 120 assert(length >= 0, "length should be non-negative"); |
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121 ((arrayOop)obj)->set_length(length); |
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122 post_allocation_setup_common(klass, obj, size); |
0 | 123 assert(((oop)obj)->blueprint()->oop_is_array(), "must be an array"); |
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124 // notify jvmti and dtrace (must be after length is set for dtrace) |
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125 post_allocation_notify(klass, (oop)obj); |
0 | 126 } |
127 | |
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128 HeapWord* CollectedHeap::common_mem_allocate_noinit(size_t size, TRAPS) { |
0 | 129 |
130 // Clear unhandled oops for memory allocation. Memory allocation might | |
131 // not take out a lock if from tlab, so clear here. | |
132 CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) | |
133 | |
134 if (HAS_PENDING_EXCEPTION) { | |
135 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
136 return NULL; // caller does a CHECK_0 too | |
137 } | |
138 | |
139 HeapWord* result = NULL; | |
140 if (UseTLAB) { | |
141 result = CollectedHeap::allocate_from_tlab(THREAD, size); | |
142 if (result != NULL) { | |
143 assert(!HAS_PENDING_EXCEPTION, | |
144 "Unexpected exception, will result in uninitialized storage"); | |
145 return result; | |
146 } | |
147 } | |
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148 bool gc_overhead_limit_was_exceeded = false; |
0 | 149 result = Universe::heap()->mem_allocate(size, |
150 &gc_overhead_limit_was_exceeded); | |
151 if (result != NULL) { | |
152 NOT_PRODUCT(Universe::heap()-> | |
153 check_for_non_bad_heap_word_value(result, size)); | |
154 assert(!HAS_PENDING_EXCEPTION, | |
155 "Unexpected exception, will result in uninitialized storage"); | |
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156 THREAD->incr_allocated_bytes(size * HeapWordSize); |
0 | 157 return result; |
158 } | |
159 | |
160 | |
161 if (!gc_overhead_limit_was_exceeded) { | |
162 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
163 report_java_out_of_memory("Java heap space"); | |
164 | |
165 if (JvmtiExport::should_post_resource_exhausted()) { | |
166 JvmtiExport::post_resource_exhausted( | |
167 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
168 "Java heap space"); | |
169 } | |
170 | |
171 THROW_OOP_0(Universe::out_of_memory_error_java_heap()); | |
172 } else { | |
173 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
174 report_java_out_of_memory("GC overhead limit exceeded"); | |
175 | |
176 if (JvmtiExport::should_post_resource_exhausted()) { | |
177 JvmtiExport::post_resource_exhausted( | |
178 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
179 "GC overhead limit exceeded"); | |
180 } | |
181 | |
182 THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); | |
183 } | |
184 } | |
185 | |
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186 HeapWord* CollectedHeap::common_mem_allocate_init(size_t size, TRAPS) { |
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187 HeapWord* obj = common_mem_allocate_noinit(size, CHECK_NULL); |
0 | 188 init_obj(obj, size); |
189 return obj; | |
190 } | |
191 | |
192 // Need to investigate, do we really want to throw OOM exception here? | |
193 HeapWord* CollectedHeap::common_permanent_mem_allocate_noinit(size_t size, TRAPS) { | |
194 if (HAS_PENDING_EXCEPTION) { | |
195 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
196 return NULL; // caller does a CHECK_NULL too | |
197 } | |
198 | |
199 #ifdef ASSERT | |
200 if (CIFireOOMAt > 0 && THREAD->is_Compiler_thread() && | |
201 ++_fire_out_of_memory_count >= CIFireOOMAt) { | |
202 // For testing of OOM handling in the CI throw an OOM and see how | |
203 // it does. Historically improper handling of these has resulted | |
204 // in crashes which we really don't want to have in the CI. | |
205 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); | |
206 } | |
207 #endif | |
208 | |
209 HeapWord* result = Universe::heap()->permanent_mem_allocate(size); | |
210 if (result != NULL) { | |
211 NOT_PRODUCT(Universe::heap()-> | |
212 check_for_non_bad_heap_word_value(result, size)); | |
213 assert(!HAS_PENDING_EXCEPTION, | |
214 "Unexpected exception, will result in uninitialized storage"); | |
215 return result; | |
216 } | |
217 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
218 report_java_out_of_memory("PermGen space"); | |
219 | |
220 if (JvmtiExport::should_post_resource_exhausted()) { | |
221 JvmtiExport::post_resource_exhausted( | |
222 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, | |
223 "PermGen space"); | |
224 } | |
225 | |
226 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); | |
227 } | |
228 | |
229 HeapWord* CollectedHeap::common_permanent_mem_allocate_init(size_t size, TRAPS) { | |
230 HeapWord* obj = common_permanent_mem_allocate_noinit(size, CHECK_NULL); | |
231 init_obj(obj, size); | |
232 return obj; | |
233 } | |
234 | |
235 HeapWord* CollectedHeap::allocate_from_tlab(Thread* thread, size_t size) { | |
236 assert(UseTLAB, "should use UseTLAB"); | |
237 | |
238 HeapWord* obj = thread->tlab().allocate(size); | |
239 if (obj != NULL) { | |
240 return obj; | |
241 } | |
242 // Otherwise... | |
243 return allocate_from_tlab_slow(thread, size); | |
244 } | |
245 | |
246 void CollectedHeap::init_obj(HeapWord* obj, size_t size) { | |
247 assert(obj != NULL, "cannot initialize NULL object"); | |
248 const size_t hs = oopDesc::header_size(); | |
249 assert(size >= hs, "unexpected object size"); | |
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250 ((oop)obj)->set_klass_gap(0); |
0 | 251 Copy::fill_to_aligned_words(obj + hs, size - hs); |
252 } | |
253 | |
254 oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { | |
255 debug_only(check_for_valid_allocation_state()); | |
256 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
257 assert(size >= 0, "int won't convert to size_t"); | |
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258 HeapWord* obj = common_mem_allocate_init(size, CHECK_NULL); |
0 | 259 post_allocation_setup_obj(klass, obj, size); |
260 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
261 return (oop)obj; | |
262 } | |
263 | |
264 oop CollectedHeap::array_allocate(KlassHandle klass, | |
265 int size, | |
266 int length, | |
267 TRAPS) { | |
268 debug_only(check_for_valid_allocation_state()); | |
269 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
270 assert(size >= 0, "int won't convert to size_t"); | |
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271 HeapWord* obj = common_mem_allocate_init(size, CHECK_NULL); |
0 | 272 post_allocation_setup_array(klass, obj, size, length); |
273 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
274 return (oop)obj; | |
275 } | |
276 | |
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277 oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
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278 int size, |
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279 int length, |
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280 TRAPS) { |
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281 debug_only(check_for_valid_allocation_state()); |
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282 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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283 assert(size >= 0, "int won't convert to size_t"); |
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284 HeapWord* obj = common_mem_allocate_noinit(size, CHECK_NULL); |
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285 ((oop)obj)->set_klass_gap(0); |
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286 post_allocation_setup_array(klass, obj, size, length); |
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287 #ifndef PRODUCT |
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288 const size_t hs = oopDesc::header_size()+1; |
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289 Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
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290 #endif |
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291 return (oop)obj; |
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292 } |
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293 |
0 | 294 oop CollectedHeap::permanent_obj_allocate(KlassHandle klass, int size, TRAPS) { |
295 oop obj = permanent_obj_allocate_no_klass_install(klass, size, CHECK_NULL); | |
296 post_allocation_install_obj_klass(klass, obj, size); | |
297 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value((HeapWord*) obj, | |
298 size)); | |
299 return obj; | |
300 } | |
301 | |
302 oop CollectedHeap::permanent_obj_allocate_no_klass_install(KlassHandle klass, | |
303 int size, | |
304 TRAPS) { | |
305 debug_only(check_for_valid_allocation_state()); | |
306 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
307 assert(size >= 0, "int won't convert to size_t"); | |
308 HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
309 post_allocation_setup_no_klass_install(klass, obj, size); | |
3892 | 310 #ifndef PRODUCT |
311 const size_t hs = oopDesc::header_size(); | |
312 Universe::heap()->check_for_bad_heap_word_value(obj+hs, size-hs); | |
313 #endif | |
0 | 314 return (oop)obj; |
315 } | |
316 | |
317 oop CollectedHeap::permanent_array_allocate(KlassHandle klass, | |
318 int size, | |
319 int length, | |
320 TRAPS) { | |
321 debug_only(check_for_valid_allocation_state()); | |
322 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
323 assert(size >= 0, "int won't convert to size_t"); | |
324 HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
325 post_allocation_setup_array(klass, obj, size, length); | |
326 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
327 return (oop)obj; | |
328 } | |
329 | |
330 // Returns "TRUE" if "p" is a method oop in the | |
331 // current heap with high probability. NOTE: The main | |
332 // current consumers of this interface are Forte:: | |
333 // and ThreadProfiler::. In these cases, the | |
334 // interpreter frame from which "p" came, may be | |
335 // under construction when sampled asynchronously, so | |
336 // the clients want to check that it represents a | |
337 // valid method before using it. Nonetheless since | |
338 // the clients do not typically lock out GC, the | |
339 // predicate is_valid_method() is not stable, so | |
340 // it is possible that by the time "p" is used, it | |
341 // is no longer valid. | |
342 inline bool CollectedHeap::is_valid_method(oop p) const { | |
343 return | |
344 p != NULL && | |
345 | |
346 // Check whether it is aligned at a HeapWord boundary. | |
347 Space::is_aligned(p) && | |
348 | |
349 // Check whether "method" is in the allocated part of the | |
350 // permanent generation -- this needs to be checked before | |
351 // p->klass() below to avoid a SEGV (but see below | |
352 // for a potential window of vulnerability). | |
353 is_permanent((void*)p) && | |
354 | |
355 // See if GC is active; however, there is still an | |
356 // apparently unavoidable window after this call | |
357 // and before the client of this interface uses "p". | |
358 // If the client chooses not to lock out GC, then | |
359 // it's a risk the client must accept. | |
360 !is_gc_active() && | |
361 | |
362 // Check that p is a methodOop. | |
363 p->klass() == Universe::methodKlassObj(); | |
364 } | |
365 | |
366 | |
367 #ifndef PRODUCT | |
368 | |
369 inline bool | |
370 CollectedHeap::promotion_should_fail(volatile size_t* count) { | |
371 // Access to count is not atomic; the value does not have to be exact. | |
372 if (PromotionFailureALot) { | |
373 const size_t gc_num = total_collections(); | |
374 const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; | |
375 if (elapsed_gcs >= PromotionFailureALotInterval) { | |
376 // Test for unsigned arithmetic wrap-around. | |
377 if (++*count >= PromotionFailureALotCount) { | |
378 *count = 0; | |
379 return true; | |
380 } | |
381 } | |
382 } | |
383 return false; | |
384 } | |
385 | |
386 inline bool CollectedHeap::promotion_should_fail() { | |
387 return promotion_should_fail(&_promotion_failure_alot_count); | |
388 } | |
389 | |
390 inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { | |
391 if (PromotionFailureALot) { | |
392 _promotion_failure_alot_gc_number = total_collections(); | |
393 *count = 0; | |
394 } | |
395 } | |
396 | |
397 inline void CollectedHeap::reset_promotion_should_fail() { | |
398 reset_promotion_should_fail(&_promotion_failure_alot_count); | |
399 } | |
400 #endif // #ifndef PRODUCT | |
1972 | 401 |
402 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |