Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 6273:4c8f2a12e757 hs24-b20
Merge
| author | twisti |
|---|---|
| date | Fri, 10 Aug 2012 17:50:24 -0700 |
| parents | 9a9bb0010c91 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 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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7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
3961
diff
changeset
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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); | |
|
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
3961
diff
changeset
|
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 |