Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 8883:b9a918201d47
Merge with hsx25
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Sat, 06 Apr 2013 20:04:06 +0200 |
| parents | c24f778e9401 |
| children | f2110083203d |
| 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" | |
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34 #include "runtime/thread.inline.hpp" |
| 1972 | 35 #include "services/lowMemoryDetector.hpp" |
| 36 #include "utilities/copy.hpp" | |
| 37 | |
| 0 | 38 // Inline allocation implementations. |
| 39 | |
| 40 void CollectedHeap::post_allocation_setup_common(KlassHandle klass, | |
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41 HeapWord* obj) { |
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42 post_allocation_setup_no_klass_install(klass, obj); |
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43 post_allocation_install_obj_klass(klass, oop(obj)); |
| 0 | 44 } |
| 45 | |
| 46 void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, | |
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47 HeapWord* objPtr) { |
| 0 | 48 oop obj = (oop)objPtr; |
| 49 | |
| 50 assert(obj != NULL, "NULL object pointer"); | |
| 51 if (UseBiasedLocking && (klass() != NULL)) { | |
| 52 obj->set_mark(klass->prototype_header()); | |
| 53 } else { | |
| 54 // May be bootstrapping | |
| 55 obj->set_mark(markOopDesc::prototype()); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, | |
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60 oop obj) { |
| 0 | 61 // These asserts are kind of complicated because of klassKlass |
| 62 // and the beginning of the world. | |
| 63 assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); | |
| 64 assert(klass() == NULL || klass()->is_klass(), "not a klass"); | |
| 65 assert(obj != NULL, "NULL object pointer"); | |
| 66 obj->set_klass(klass()); | |
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67 assert(!Universe::is_fully_initialized() || obj->klass() != NULL, |
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68 "missing klass"); |
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69 } |
| 0 | 70 |
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71 // Support for jvmti and dtrace |
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72 inline void post_allocation_notify(KlassHandle klass, oop obj) { |
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73 // support low memory notifications (no-op if not enabled) |
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74 LowMemoryDetector::detect_low_memory_for_collected_pools(); |
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75 |
| 0 | 76 // support for JVMTI VMObjectAlloc event (no-op if not enabled) |
| 77 JvmtiExport::vm_object_alloc_event_collector(obj); | |
| 78 | |
| 79 if (DTraceAllocProbes) { | |
| 80 // support for Dtrace object alloc event (no-op most of the time) | |
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81 if (klass() != NULL && klass()->name() != NULL) { |
| 0 | 82 SharedRuntime::dtrace_object_alloc(obj); |
| 83 } | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, | |
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88 HeapWord* obj) { |
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89 post_allocation_setup_common(klass, obj); |
| 0 | 90 assert(Universe::is_bootstrapping() || |
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91 !((oop)obj)->is_array(), "must not be an array"); |
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92 // notify jvmti and dtrace |
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93 post_allocation_notify(klass, (oop)obj); |
| 0 | 94 } |
| 95 | |
| 96 void CollectedHeap::post_allocation_setup_array(KlassHandle klass, | |
| 97 HeapWord* obj, | |
| 98 int length) { | |
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99 // Set array length before setting the _klass field |
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100 // in post_allocation_setup_common() because the klass field |
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101 // indicates that the object is parsable by concurrent GC. |
| 0 | 102 assert(length >= 0, "length should be non-negative"); |
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103 ((arrayOop)obj)->set_length(length); |
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104 post_allocation_setup_common(klass, obj); |
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105 assert(((oop)obj)->is_array(), "must be an array"); |
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106 // notify jvmti and dtrace (must be after length is set for dtrace) |
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107 post_allocation_notify(klass, (oop)obj); |
| 0 | 108 } |
| 109 | |
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110 HeapWord* CollectedHeap::common_mem_allocate_noinit(size_t size, TRAPS) { |
| 0 | 111 |
| 112 // Clear unhandled oops for memory allocation. Memory allocation might | |
| 113 // not take out a lock if from tlab, so clear here. | |
| 114 CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) | |
| 115 | |
| 116 if (HAS_PENDING_EXCEPTION) { | |
| 117 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
| 118 return NULL; // caller does a CHECK_0 too | |
| 119 } | |
| 120 | |
| 121 HeapWord* result = NULL; | |
| 122 if (UseTLAB) { | |
| 123 result = CollectedHeap::allocate_from_tlab(THREAD, size); | |
| 124 if (result != NULL) { | |
| 125 assert(!HAS_PENDING_EXCEPTION, | |
| 126 "Unexpected exception, will result in uninitialized storage"); | |
| 127 return result; | |
| 128 } | |
| 129 } | |
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130 bool gc_overhead_limit_was_exceeded = false; |
| 0 | 131 result = Universe::heap()->mem_allocate(size, |
| 132 &gc_overhead_limit_was_exceeded); | |
| 133 if (result != NULL) { | |
| 134 NOT_PRODUCT(Universe::heap()-> | |
| 135 check_for_non_bad_heap_word_value(result, size)); | |
| 136 assert(!HAS_PENDING_EXCEPTION, | |
| 137 "Unexpected exception, will result in uninitialized storage"); | |
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138 THREAD->incr_allocated_bytes(size * HeapWordSize); |
| 0 | 139 return result; |
| 140 } | |
| 141 | |
| 142 | |
| 143 if (!gc_overhead_limit_was_exceeded) { | |
| 144 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
| 145 report_java_out_of_memory("Java heap space"); | |
| 146 | |
| 147 if (JvmtiExport::should_post_resource_exhausted()) { | |
| 148 JvmtiExport::post_resource_exhausted( | |
| 149 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
| 150 "Java heap space"); | |
| 151 } | |
| 152 | |
| 153 THROW_OOP_0(Universe::out_of_memory_error_java_heap()); | |
| 154 } else { | |
| 155 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
| 156 report_java_out_of_memory("GC overhead limit exceeded"); | |
| 157 | |
| 158 if (JvmtiExport::should_post_resource_exhausted()) { | |
| 159 JvmtiExport::post_resource_exhausted( | |
| 160 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
| 161 "GC overhead limit exceeded"); | |
| 162 } | |
| 163 | |
| 164 THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); | |
| 165 } | |
| 166 } | |
| 167 | |
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168 HeapWord* CollectedHeap::common_mem_allocate_init(size_t size, TRAPS) { |
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169 HeapWord* obj = common_mem_allocate_noinit(size, CHECK_NULL); |
| 0 | 170 init_obj(obj, size); |
| 171 return obj; | |
| 172 } | |
| 173 | |
| 174 HeapWord* CollectedHeap::allocate_from_tlab(Thread* thread, size_t size) { | |
| 175 assert(UseTLAB, "should use UseTLAB"); | |
| 176 | |
| 177 HeapWord* obj = thread->tlab().allocate(size); | |
| 178 if (obj != NULL) { | |
| 179 return obj; | |
| 180 } | |
| 181 // Otherwise... | |
| 182 return allocate_from_tlab_slow(thread, size); | |
| 183 } | |
| 184 | |
| 185 void CollectedHeap::init_obj(HeapWord* obj, size_t size) { | |
| 186 assert(obj != NULL, "cannot initialize NULL object"); | |
| 187 const size_t hs = oopDesc::header_size(); | |
| 188 assert(size >= hs, "unexpected object size"); | |
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189 ((oop)obj)->set_klass_gap(0); |
| 0 | 190 Copy::fill_to_aligned_words(obj + hs, size - hs); |
| 191 } | |
| 192 | |
| 193 oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { | |
| 194 debug_only(check_for_valid_allocation_state()); | |
| 195 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
| 196 assert(size >= 0, "int won't convert to size_t"); | |
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197 HeapWord* obj = common_mem_allocate_init(size, CHECK_NULL); |
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198 post_allocation_setup_obj(klass, obj); |
| 0 | 199 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
| 200 return (oop)obj; | |
| 201 } | |
| 202 | |
| 203 oop CollectedHeap::array_allocate(KlassHandle klass, | |
| 204 int size, | |
| 205 int length, | |
| 206 TRAPS) { | |
| 207 debug_only(check_for_valid_allocation_state()); | |
| 208 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
| 209 assert(size >= 0, "int won't convert to size_t"); | |
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210 HeapWord* obj = common_mem_allocate_init(size, CHECK_NULL); |
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211 post_allocation_setup_array(klass, obj, length); |
| 0 | 212 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
| 213 return (oop)obj; | |
| 214 } | |
| 215 | |
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216 oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
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217 int size, |
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218 int length, |
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219 TRAPS) { |
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220 debug_only(check_for_valid_allocation_state()); |
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221 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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222 assert(size >= 0, "int won't convert to size_t"); |
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223 HeapWord* obj = common_mem_allocate_noinit(size, CHECK_NULL); |
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224 ((oop)obj)->set_klass_gap(0); |
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225 post_allocation_setup_array(klass, obj, length); |
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226 #ifndef PRODUCT |
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227 const size_t hs = oopDesc::header_size()+1; |
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228 Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
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229 #endif |
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230 return (oop)obj; |
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231 } |
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232 |
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233 inline void CollectedHeap::oop_iterate_no_header(OopClosure* cl) { |
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234 NoHeaderExtendedOopClosure no_header_cl(cl); |
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235 oop_iterate(&no_header_cl); |
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236 } |
| 0 | 237 |
| 238 #ifndef PRODUCT | |
| 239 | |
| 240 inline bool | |
| 241 CollectedHeap::promotion_should_fail(volatile size_t* count) { | |
| 242 // Access to count is not atomic; the value does not have to be exact. | |
| 243 if (PromotionFailureALot) { | |
| 244 const size_t gc_num = total_collections(); | |
| 245 const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; | |
| 246 if (elapsed_gcs >= PromotionFailureALotInterval) { | |
| 247 // Test for unsigned arithmetic wrap-around. | |
| 248 if (++*count >= PromotionFailureALotCount) { | |
| 249 *count = 0; | |
| 250 return true; | |
| 251 } | |
| 252 } | |
| 253 } | |
| 254 return false; | |
| 255 } | |
| 256 | |
| 257 inline bool CollectedHeap::promotion_should_fail() { | |
| 258 return promotion_should_fail(&_promotion_failure_alot_count); | |
| 259 } | |
| 260 | |
| 261 inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { | |
| 262 if (PromotionFailureALot) { | |
| 263 _promotion_failure_alot_gc_number = total_collections(); | |
| 264 *count = 0; | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 inline void CollectedHeap::reset_promotion_should_fail() { | |
| 269 reset_promotion_should_fail(&_promotion_failure_alot_count); | |
| 270 } | |
| 271 #endif // #ifndef PRODUCT | |
| 1972 | 272 |
| 273 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |