Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 17524 | 2 * Copyright (c) 2001, 2013, 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 | |
| 10405 | 28 #include "gc_interface/allocTracer.hpp" |
| 1972 | 29 #include "gc_interface/collectedHeap.hpp" |
| 30 #include "memory/threadLocalAllocBuffer.inline.hpp" | |
| 31 #include "memory/universe.hpp" | |
| 32 #include "oops/arrayOop.hpp" | |
| 33 #include "prims/jvmtiExport.hpp" | |
| 34 #include "runtime/sharedRuntime.hpp" | |
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35 #include "runtime/thread.inline.hpp" |
| 1972 | 36 #include "services/lowMemoryDetector.hpp" |
| 37 #include "utilities/copy.hpp" | |
| 38 | |
| 0 | 39 // Inline allocation implementations. |
| 40 | |
| 41 void CollectedHeap::post_allocation_setup_common(KlassHandle klass, | |
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42 HeapWord* obj) { |
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43 post_allocation_setup_no_klass_install(klass, obj); |
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44 post_allocation_install_obj_klass(klass, oop(obj)); |
| 0 | 45 } |
| 46 | |
| 47 void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, | |
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48 HeapWord* objPtr) { |
| 0 | 49 oop obj = (oop)objPtr; |
| 50 | |
| 51 assert(obj != NULL, "NULL object pointer"); | |
| 52 if (UseBiasedLocking && (klass() != NULL)) { | |
| 53 obj->set_mark(klass->prototype_header()); | |
| 54 } else { | |
| 55 // May be bootstrapping | |
| 56 obj->set_mark(markOopDesc::prototype()); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, | |
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61 oop obj) { |
| 0 | 62 // These asserts are kind of complicated because of klassKlass |
| 63 // and the beginning of the world. | |
| 64 assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); | |
| 65 assert(klass() == NULL || klass()->is_klass(), "not a klass"); | |
| 66 assert(obj != NULL, "NULL object pointer"); | |
| 67 obj->set_klass(klass()); | |
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68 assert(!Universe::is_fully_initialized() || obj->klass() != NULL, |
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69 "missing klass"); |
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70 } |
| 0 | 71 |
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72 // Support for jvmti and dtrace |
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73 inline void post_allocation_notify(KlassHandle klass, oop obj) { |
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74 // support low memory notifications (no-op if not enabled) |
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75 LowMemoryDetector::detect_low_memory_for_collected_pools(); |
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76 |
| 0 | 77 // support for JVMTI VMObjectAlloc event (no-op if not enabled) |
| 78 JvmtiExport::vm_object_alloc_event_collector(obj); | |
| 79 | |
| 80 if (DTraceAllocProbes) { | |
| 81 // support for Dtrace object alloc event (no-op most of the time) | |
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82 if (klass() != NULL && klass()->name() != NULL) { |
| 0 | 83 SharedRuntime::dtrace_object_alloc(obj); |
| 84 } | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, | |
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89 HeapWord* obj) { |
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90 post_allocation_setup_common(klass, obj); |
| 0 | 91 assert(Universe::is_bootstrapping() || |
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92 !((oop)obj)->is_array(), "must not be an array"); |
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93 // notify jvmti and dtrace |
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94 post_allocation_notify(klass, (oop)obj); |
| 0 | 95 } |
| 96 | |
| 97 void CollectedHeap::post_allocation_setup_array(KlassHandle klass, | |
| 98 HeapWord* obj, | |
| 99 int length) { | |
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100 // Set array length before setting the _klass field |
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101 // in post_allocation_setup_common() because the klass field |
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102 // indicates that the object is parsable by concurrent GC. |
| 0 | 103 assert(length >= 0, "length should be non-negative"); |
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104 ((arrayOop)obj)->set_length(length); |
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105 post_allocation_setup_common(klass, obj); |
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106 assert(((oop)obj)->is_array(), "must be an array"); |
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107 // notify jvmti and dtrace (must be after length is set for dtrace) |
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108 post_allocation_notify(klass, (oop)obj); |
| 0 | 109 } |
| 110 | |
| 10405 | 111 HeapWord* CollectedHeap::common_mem_allocate_noinit(KlassHandle klass, size_t size, TRAPS) { |
| 0 | 112 |
| 113 // Clear unhandled oops for memory allocation. Memory allocation might | |
| 114 // not take out a lock if from tlab, so clear here. | |
| 115 CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) | |
| 116 | |
| 117 if (HAS_PENDING_EXCEPTION) { | |
| 118 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
| 119 return NULL; // caller does a CHECK_0 too | |
| 120 } | |
| 121 | |
| 122 HeapWord* result = NULL; | |
| 123 if (UseTLAB) { | |
| 10405 | 124 result = allocate_from_tlab(klass, THREAD, size); |
| 0 | 125 if (result != NULL) { |
| 126 assert(!HAS_PENDING_EXCEPTION, | |
| 127 "Unexpected exception, will result in uninitialized storage"); | |
| 128 return result; | |
| 129 } | |
| 130 } | |
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131 bool gc_overhead_limit_was_exceeded = false; |
| 0 | 132 result = Universe::heap()->mem_allocate(size, |
| 133 &gc_overhead_limit_was_exceeded); | |
| 134 if (result != NULL) { | |
| 135 NOT_PRODUCT(Universe::heap()-> | |
| 136 check_for_non_bad_heap_word_value(result, size)); | |
| 137 assert(!HAS_PENDING_EXCEPTION, | |
| 138 "Unexpected exception, will result in uninitialized storage"); | |
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139 THREAD->incr_allocated_bytes(size * HeapWordSize); |
| 10405 | 140 |
| 141 AllocTracer::send_allocation_outside_tlab_event(klass, size * HeapWordSize); | |
| 142 | |
| 0 | 143 return result; |
| 144 } | |
| 145 | |
| 146 | |
| 147 if (!gc_overhead_limit_was_exceeded) { | |
| 148 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
| 149 report_java_out_of_memory("Java heap space"); | |
| 150 | |
| 151 if (JvmtiExport::should_post_resource_exhausted()) { | |
| 152 JvmtiExport::post_resource_exhausted( | |
| 153 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
| 154 "Java heap space"); | |
| 155 } | |
| 156 | |
| 157 THROW_OOP_0(Universe::out_of_memory_error_java_heap()); | |
| 158 } else { | |
| 159 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
| 160 report_java_out_of_memory("GC overhead limit exceeded"); | |
| 161 | |
| 162 if (JvmtiExport::should_post_resource_exhausted()) { | |
| 163 JvmtiExport::post_resource_exhausted( | |
| 164 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
| 165 "GC overhead limit exceeded"); | |
| 166 } | |
| 167 | |
| 168 THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); | |
| 169 } | |
| 170 } | |
| 171 | |
| 10405 | 172 HeapWord* CollectedHeap::common_mem_allocate_init(KlassHandle klass, size_t size, TRAPS) { |
| 173 HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); | |
| 0 | 174 init_obj(obj, size); |
| 175 return obj; | |
| 176 } | |
| 177 | |
| 10405 | 178 HeapWord* CollectedHeap::allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size) { |
| 0 | 179 assert(UseTLAB, "should use UseTLAB"); |
| 180 | |
| 181 HeapWord* obj = thread->tlab().allocate(size); | |
| 182 if (obj != NULL) { | |
| 183 return obj; | |
| 184 } | |
| 185 // Otherwise... | |
| 10405 | 186 return allocate_from_tlab_slow(klass, thread, size); |
| 0 | 187 } |
| 188 | |
| 189 void CollectedHeap::init_obj(HeapWord* obj, size_t size) { | |
| 190 assert(obj != NULL, "cannot initialize NULL object"); | |
| 191 const size_t hs = oopDesc::header_size(); | |
| 192 assert(size >= hs, "unexpected object size"); | |
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193 ((oop)obj)->set_klass_gap(0); |
| 0 | 194 Copy::fill_to_aligned_words(obj + hs, size - hs); |
| 195 } | |
| 196 | |
| 197 oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { | |
| 198 debug_only(check_for_valid_allocation_state()); | |
| 199 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
| 200 assert(size >= 0, "int won't convert to size_t"); | |
| 10405 | 201 HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
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202 post_allocation_setup_obj(klass, obj); |
| 0 | 203 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
| 204 return (oop)obj; | |
| 205 } | |
| 206 | |
| 207 oop CollectedHeap::array_allocate(KlassHandle klass, | |
| 208 int size, | |
| 209 int length, | |
| 210 TRAPS) { | |
| 211 debug_only(check_for_valid_allocation_state()); | |
| 212 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
| 213 assert(size >= 0, "int won't convert to size_t"); | |
| 10405 | 214 HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
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215 post_allocation_setup_array(klass, obj, length); |
| 0 | 216 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
| 217 return (oop)obj; | |
| 218 } | |
| 219 | |
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220 oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
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221 int size, |
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222 int length, |
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223 TRAPS) { |
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224 debug_only(check_for_valid_allocation_state()); |
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225 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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226 assert(size >= 0, "int won't convert to size_t"); |
| 10405 | 227 HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); |
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228 ((oop)obj)->set_klass_gap(0); |
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229 post_allocation_setup_array(klass, obj, length); |
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230 #ifndef PRODUCT |
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231 const size_t hs = oopDesc::header_size()+1; |
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232 Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
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233 #endif |
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234 return (oop)obj; |
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235 } |
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236 |
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237 inline void CollectedHeap::oop_iterate_no_header(OopClosure* cl) { |
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238 NoHeaderExtendedOopClosure no_header_cl(cl); |
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239 oop_iterate(&no_header_cl); |
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240 } |
| 0 | 241 |
| 242 #ifndef PRODUCT | |
| 243 | |
| 244 inline bool | |
| 245 CollectedHeap::promotion_should_fail(volatile size_t* count) { | |
| 246 // Access to count is not atomic; the value does not have to be exact. | |
| 247 if (PromotionFailureALot) { | |
| 248 const size_t gc_num = total_collections(); | |
| 249 const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; | |
| 250 if (elapsed_gcs >= PromotionFailureALotInterval) { | |
| 251 // Test for unsigned arithmetic wrap-around. | |
| 252 if (++*count >= PromotionFailureALotCount) { | |
| 253 *count = 0; | |
| 254 return true; | |
| 255 } | |
| 256 } | |
| 257 } | |
| 258 return false; | |
| 259 } | |
| 260 | |
| 261 inline bool CollectedHeap::promotion_should_fail() { | |
| 262 return promotion_should_fail(&_promotion_failure_alot_count); | |
| 263 } | |
| 264 | |
| 265 inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { | |
| 266 if (PromotionFailureALot) { | |
| 267 _promotion_failure_alot_gc_number = total_collections(); | |
| 268 *count = 0; | |
| 269 } | |
| 270 } | |
| 271 | |
| 272 inline void CollectedHeap::reset_promotion_should_fail() { | |
| 273 reset_promotion_should_fail(&_promotion_failure_alot_count); | |
| 274 } | |
| 275 #endif // #ifndef PRODUCT | |
| 1972 | 276 |
| 277 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |