Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 6566:ef48be91f5fd
fixed detection of architecture on Snow Leopard and earlier versions of MacOSX
author | Doug Simon <doug.simon@oracle.com> |
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date | Sat, 20 Oct 2012 12:21:23 +0200 |
parents | 9a9bb0010c91 |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 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 * | |
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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, | |
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53 HeapWord* obj) { |
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54 post_allocation_setup_no_klass_install(klass, obj); |
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55 post_allocation_install_obj_klass(klass, oop(obj)); |
0 | 56 } |
57 | |
58 void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, | |
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59 HeapWord* objPtr) { |
0 | 60 oop obj = (oop)objPtr; |
61 | |
62 assert(obj != NULL, "NULL object pointer"); | |
63 if (UseBiasedLocking && (klass() != NULL)) { | |
64 obj->set_mark(klass->prototype_header()); | |
65 } else { | |
66 // May be bootstrapping | |
67 obj->set_mark(markOopDesc::prototype()); | |
68 } | |
69 } | |
70 | |
71 void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, | |
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72 oop obj) { |
0 | 73 // These asserts are kind of complicated because of klassKlass |
74 // and the beginning of the world. | |
75 assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); | |
76 assert(klass() == NULL || klass()->is_klass(), "not a klass"); | |
77 assert(klass() == NULL || klass()->klass_part() != NULL, "not a klass"); | |
78 assert(obj != NULL, "NULL object pointer"); | |
79 obj->set_klass(klass()); | |
80 assert(!Universe::is_fully_initialized() || obj->blueprint() != NULL, | |
81 "missing blueprint"); | |
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82 } |
0 | 83 |
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84 // Support for jvmti and dtrace |
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85 inline void post_allocation_notify(KlassHandle klass, oop obj) { |
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86 // support low memory notifications (no-op if not enabled) |
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87 LowMemoryDetector::detect_low_memory_for_collected_pools(); |
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88 |
0 | 89 // support for JVMTI VMObjectAlloc event (no-op if not enabled) |
90 JvmtiExport::vm_object_alloc_event_collector(obj); | |
91 | |
92 if (DTraceAllocProbes) { | |
93 // support for Dtrace object alloc event (no-op most of the time) | |
94 if (klass() != NULL && klass()->klass_part()->name() != NULL) { | |
95 SharedRuntime::dtrace_object_alloc(obj); | |
96 } | |
97 } | |
98 } | |
99 | |
100 void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, | |
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101 HeapWord* obj) { |
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102 post_allocation_setup_common(klass, obj); |
0 | 103 assert(Universe::is_bootstrapping() || |
104 !((oop)obj)->blueprint()->oop_is_array(), "must not be an array"); | |
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105 // notify jvmti and dtrace |
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106 post_allocation_notify(klass, (oop)obj); |
0 | 107 } |
108 | |
109 void CollectedHeap::post_allocation_setup_array(KlassHandle klass, | |
110 HeapWord* obj, | |
111 int length) { | |
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112 // Set array length before setting the _klass field |
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113 // in post_allocation_setup_common() because the klass field |
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114 // indicates that the object is parsable by concurrent GC. |
0 | 115 assert(length >= 0, "length should be non-negative"); |
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116 ((arrayOop)obj)->set_length(length); |
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117 post_allocation_setup_common(klass, obj); |
0 | 118 assert(((oop)obj)->blueprint()->oop_is_array(), "must be an array"); |
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119 // notify jvmti and dtrace (must be after length is set for dtrace) |
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120 post_allocation_notify(klass, (oop)obj); |
0 | 121 } |
122 | |
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123 HeapWord* CollectedHeap::common_mem_allocate_noinit(size_t size, TRAPS) { |
0 | 124 |
125 // Clear unhandled oops for memory allocation. Memory allocation might | |
126 // not take out a lock if from tlab, so clear here. | |
127 CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) | |
128 | |
129 if (HAS_PENDING_EXCEPTION) { | |
130 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
131 return NULL; // caller does a CHECK_0 too | |
132 } | |
133 | |
134 HeapWord* result = NULL; | |
135 if (UseTLAB) { | |
136 result = CollectedHeap::allocate_from_tlab(THREAD, size); | |
137 if (result != NULL) { | |
138 assert(!HAS_PENDING_EXCEPTION, | |
139 "Unexpected exception, will result in uninitialized storage"); | |
140 return result; | |
141 } | |
142 } | |
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143 bool gc_overhead_limit_was_exceeded = false; |
0 | 144 result = Universe::heap()->mem_allocate(size, |
145 &gc_overhead_limit_was_exceeded); | |
146 if (result != NULL) { | |
147 NOT_PRODUCT(Universe::heap()-> | |
148 check_for_non_bad_heap_word_value(result, size)); | |
149 assert(!HAS_PENDING_EXCEPTION, | |
150 "Unexpected exception, will result in uninitialized storage"); | |
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151 THREAD->incr_allocated_bytes(size * HeapWordSize); |
0 | 152 return result; |
153 } | |
154 | |
155 | |
156 if (!gc_overhead_limit_was_exceeded) { | |
157 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
158 report_java_out_of_memory("Java heap space"); | |
159 | |
160 if (JvmtiExport::should_post_resource_exhausted()) { | |
161 JvmtiExport::post_resource_exhausted( | |
162 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
163 "Java heap space"); | |
164 } | |
165 | |
166 THROW_OOP_0(Universe::out_of_memory_error_java_heap()); | |
167 } else { | |
168 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
169 report_java_out_of_memory("GC overhead limit exceeded"); | |
170 | |
171 if (JvmtiExport::should_post_resource_exhausted()) { | |
172 JvmtiExport::post_resource_exhausted( | |
173 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
174 "GC overhead limit exceeded"); | |
175 } | |
176 | |
177 THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); | |
178 } | |
179 } | |
180 | |
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181 HeapWord* CollectedHeap::common_mem_allocate_init(size_t size, TRAPS) { |
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182 HeapWord* obj = common_mem_allocate_noinit(size, CHECK_NULL); |
0 | 183 init_obj(obj, size); |
184 return obj; | |
185 } | |
186 | |
187 // Need to investigate, do we really want to throw OOM exception here? | |
188 HeapWord* CollectedHeap::common_permanent_mem_allocate_noinit(size_t size, TRAPS) { | |
189 if (HAS_PENDING_EXCEPTION) { | |
190 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
191 return NULL; // caller does a CHECK_NULL too | |
192 } | |
193 | |
194 #ifdef ASSERT | |
195 if (CIFireOOMAt > 0 && THREAD->is_Compiler_thread() && | |
196 ++_fire_out_of_memory_count >= CIFireOOMAt) { | |
197 // For testing of OOM handling in the CI throw an OOM and see how | |
198 // it does. Historically improper handling of these has resulted | |
199 // in crashes which we really don't want to have in the CI. | |
200 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); | |
201 } | |
202 #endif | |
203 | |
204 HeapWord* result = Universe::heap()->permanent_mem_allocate(size); | |
205 if (result != NULL) { | |
206 NOT_PRODUCT(Universe::heap()-> | |
207 check_for_non_bad_heap_word_value(result, size)); | |
208 assert(!HAS_PENDING_EXCEPTION, | |
209 "Unexpected exception, will result in uninitialized storage"); | |
210 return result; | |
211 } | |
212 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
213 report_java_out_of_memory("PermGen space"); | |
214 | |
215 if (JvmtiExport::should_post_resource_exhausted()) { | |
216 JvmtiExport::post_resource_exhausted( | |
217 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, | |
218 "PermGen space"); | |
219 } | |
220 | |
221 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); | |
222 } | |
223 | |
224 HeapWord* CollectedHeap::common_permanent_mem_allocate_init(size_t size, TRAPS) { | |
225 HeapWord* obj = common_permanent_mem_allocate_noinit(size, CHECK_NULL); | |
226 init_obj(obj, size); | |
227 return obj; | |
228 } | |
229 | |
230 HeapWord* CollectedHeap::allocate_from_tlab(Thread* thread, size_t size) { | |
231 assert(UseTLAB, "should use UseTLAB"); | |
232 | |
233 HeapWord* obj = thread->tlab().allocate(size); | |
234 if (obj != NULL) { | |
235 return obj; | |
236 } | |
237 // Otherwise... | |
238 return allocate_from_tlab_slow(thread, size); | |
239 } | |
240 | |
241 void CollectedHeap::init_obj(HeapWord* obj, size_t size) { | |
242 assert(obj != NULL, "cannot initialize NULL object"); | |
243 const size_t hs = oopDesc::header_size(); | |
244 assert(size >= hs, "unexpected object size"); | |
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245 ((oop)obj)->set_klass_gap(0); |
0 | 246 Copy::fill_to_aligned_words(obj + hs, size - hs); |
247 } | |
248 | |
249 oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { | |
250 debug_only(check_for_valid_allocation_state()); | |
251 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
252 assert(size >= 0, "int won't convert to size_t"); | |
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253 HeapWord* obj = common_mem_allocate_init(size, CHECK_NULL); |
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254 post_allocation_setup_obj(klass, obj); |
0 | 255 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
256 return (oop)obj; | |
257 } | |
258 | |
259 oop CollectedHeap::array_allocate(KlassHandle klass, | |
260 int size, | |
261 int length, | |
262 TRAPS) { | |
263 debug_only(check_for_valid_allocation_state()); | |
264 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
265 assert(size >= 0, "int won't convert to size_t"); | |
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266 HeapWord* obj = common_mem_allocate_init(size, CHECK_NULL); |
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267 post_allocation_setup_array(klass, obj, length); |
0 | 268 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
269 return (oop)obj; | |
270 } | |
271 | |
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272 oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
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273 int size, |
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274 int length, |
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275 TRAPS) { |
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276 debug_only(check_for_valid_allocation_state()); |
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277 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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278 assert(size >= 0, "int won't convert to size_t"); |
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279 HeapWord* obj = common_mem_allocate_noinit(size, CHECK_NULL); |
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280 ((oop)obj)->set_klass_gap(0); |
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281 post_allocation_setup_array(klass, obj, length); |
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282 #ifndef PRODUCT |
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283 const size_t hs = oopDesc::header_size()+1; |
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284 Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
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285 #endif |
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286 return (oop)obj; |
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287 } |
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288 |
0 | 289 oop CollectedHeap::permanent_obj_allocate(KlassHandle klass, int size, TRAPS) { |
290 oop obj = permanent_obj_allocate_no_klass_install(klass, size, CHECK_NULL); | |
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291 post_allocation_install_obj_klass(klass, obj); |
0 | 292 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value((HeapWord*) obj, |
293 size)); | |
294 return obj; | |
295 } | |
296 | |
297 oop CollectedHeap::permanent_obj_allocate_no_klass_install(KlassHandle klass, | |
298 int size, | |
299 TRAPS) { | |
300 debug_only(check_for_valid_allocation_state()); | |
301 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
302 assert(size >= 0, "int won't convert to size_t"); | |
303 HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
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304 post_allocation_setup_no_klass_install(klass, obj); |
3892 | 305 #ifndef PRODUCT |
306 const size_t hs = oopDesc::header_size(); | |
307 Universe::heap()->check_for_bad_heap_word_value(obj+hs, size-hs); | |
308 #endif | |
0 | 309 return (oop)obj; |
310 } | |
311 | |
312 oop CollectedHeap::permanent_array_allocate(KlassHandle klass, | |
313 int size, | |
314 int length, | |
315 TRAPS) { | |
316 debug_only(check_for_valid_allocation_state()); | |
317 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
318 assert(size >= 0, "int won't convert to size_t"); | |
319 HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
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320 post_allocation_setup_array(klass, obj, length); |
0 | 321 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
322 return (oop)obj; | |
323 } | |
324 | |
325 // Returns "TRUE" if "p" is a method oop in the | |
326 // current heap with high probability. NOTE: The main | |
327 // current consumers of this interface are Forte:: | |
328 // and ThreadProfiler::. In these cases, the | |
329 // interpreter frame from which "p" came, may be | |
330 // under construction when sampled asynchronously, so | |
331 // the clients want to check that it represents a | |
332 // valid method before using it. Nonetheless since | |
333 // the clients do not typically lock out GC, the | |
334 // predicate is_valid_method() is not stable, so | |
335 // it is possible that by the time "p" is used, it | |
336 // is no longer valid. | |
337 inline bool CollectedHeap::is_valid_method(oop p) const { | |
338 return | |
339 p != NULL && | |
340 | |
341 // Check whether it is aligned at a HeapWord boundary. | |
342 Space::is_aligned(p) && | |
343 | |
344 // Check whether "method" is in the allocated part of the | |
345 // permanent generation -- this needs to be checked before | |
346 // p->klass() below to avoid a SEGV (but see below | |
347 // for a potential window of vulnerability). | |
348 is_permanent((void*)p) && | |
349 | |
350 // See if GC is active; however, there is still an | |
351 // apparently unavoidable window after this call | |
352 // and before the client of this interface uses "p". | |
353 // If the client chooses not to lock out GC, then | |
354 // it's a risk the client must accept. | |
355 !is_gc_active() && | |
356 | |
357 // Check that p is a methodOop. | |
358 p->klass() == Universe::methodKlassObj(); | |
359 } | |
360 | |
361 | |
362 #ifndef PRODUCT | |
363 | |
364 inline bool | |
365 CollectedHeap::promotion_should_fail(volatile size_t* count) { | |
366 // Access to count is not atomic; the value does not have to be exact. | |
367 if (PromotionFailureALot) { | |
368 const size_t gc_num = total_collections(); | |
369 const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; | |
370 if (elapsed_gcs >= PromotionFailureALotInterval) { | |
371 // Test for unsigned arithmetic wrap-around. | |
372 if (++*count >= PromotionFailureALotCount) { | |
373 *count = 0; | |
374 return true; | |
375 } | |
376 } | |
377 } | |
378 return false; | |
379 } | |
380 | |
381 inline bool CollectedHeap::promotion_should_fail() { | |
382 return promotion_should_fail(&_promotion_failure_alot_count); | |
383 } | |
384 | |
385 inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { | |
386 if (PromotionFailureALot) { | |
387 _promotion_failure_alot_gc_number = total_collections(); | |
388 *count = 0; | |
389 } | |
390 } | |
391 | |
392 inline void CollectedHeap::reset_promotion_should_fail() { | |
393 reset_promotion_should_fail(&_promotion_failure_alot_count); | |
394 } | |
395 #endif // #ifndef PRODUCT | |
1972 | 396 |
397 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |