Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.inline.hpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Tue, 07 Apr 2015 14:58:49 +0200 |
| parents | 52b4284cb496 ee019285a52c |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, 2014, 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, int size) { |
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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) { |
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83 SharedRuntime::dtrace_object_alloc(obj, size); |
| 0 | 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 int size) { |
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91 post_allocation_setup_common(klass, obj); |
| 0 | 92 assert(Universe::is_bootstrapping() || |
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93 !((oop)obj)->is_array(), "must not be an array"); |
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94 // notify jvmti and dtrace |
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95 post_allocation_notify(klass, (oop)obj, size); |
| 0 | 96 } |
| 97 | |
| 98 void CollectedHeap::post_allocation_setup_array(KlassHandle klass, | |
| 99 HeapWord* obj, | |
| 100 int length) { | |
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101 // Set array length before setting the _klass field |
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102 // in post_allocation_setup_common() because the klass field |
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103 // indicates that the object is parsable by concurrent GC. |
| 0 | 104 assert(length >= 0, "length should be non-negative"); |
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105 ((arrayOop)obj)->set_length(length); |
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106 post_allocation_setup_common(klass, obj); |
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107 oop new_obj = (oop)obj; |
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108 assert(new_obj->is_array(), "must be an array"); |
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109 // notify jvmti and dtrace (must be after length is set for dtrace) |
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110 post_allocation_notify(klass, new_obj, new_obj->size()); |
| 0 | 111 } |
| 112 | |
| 10405 | 113 HeapWord* CollectedHeap::common_mem_allocate_noinit(KlassHandle klass, size_t size, TRAPS) { |
| 0 | 114 |
| 115 // Clear unhandled oops for memory allocation. Memory allocation might | |
| 116 // not take out a lock if from tlab, so clear here. | |
| 117 CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) | |
| 118 | |
| 119 if (HAS_PENDING_EXCEPTION) { | |
| 120 NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); | |
| 121 return NULL; // caller does a CHECK_0 too | |
| 122 } | |
| 123 | |
| 124 HeapWord* result = NULL; | |
| 125 if (UseTLAB) { | |
| 10405 | 126 result = allocate_from_tlab(klass, THREAD, size); |
| 0 | 127 if (result != NULL) { |
| 128 assert(!HAS_PENDING_EXCEPTION, | |
| 129 "Unexpected exception, will result in uninitialized storage"); | |
| 130 return result; | |
| 131 } | |
| 132 } | |
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133 bool gc_overhead_limit_was_exceeded = false; |
| 0 | 134 result = Universe::heap()->mem_allocate(size, |
| 135 &gc_overhead_limit_was_exceeded); | |
| 136 if (result != NULL) { | |
| 137 NOT_PRODUCT(Universe::heap()-> | |
| 138 check_for_non_bad_heap_word_value(result, size)); | |
| 139 assert(!HAS_PENDING_EXCEPTION, | |
| 140 "Unexpected exception, will result in uninitialized storage"); | |
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141 THREAD->incr_allocated_bytes(size * HeapWordSize); |
| 10405 | 142 |
| 143 AllocTracer::send_allocation_outside_tlab_event(klass, size * HeapWordSize); | |
| 144 | |
| 0 | 145 return result; |
| 146 } | |
| 147 | |
| 148 | |
| 149 if (!gc_overhead_limit_was_exceeded) { | |
| 150 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
| 151 report_java_out_of_memory("Java heap space"); | |
| 152 | |
| 153 if (JvmtiExport::should_post_resource_exhausted()) { | |
| 154 JvmtiExport::post_resource_exhausted( | |
| 155 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
| 156 "Java heap space"); | |
| 157 } | |
| 158 | |
| 159 THROW_OOP_0(Universe::out_of_memory_error_java_heap()); | |
| 160 } else { | |
| 161 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support | |
| 162 report_java_out_of_memory("GC overhead limit exceeded"); | |
| 163 | |
| 164 if (JvmtiExport::should_post_resource_exhausted()) { | |
| 165 JvmtiExport::post_resource_exhausted( | |
| 166 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, | |
| 167 "GC overhead limit exceeded"); | |
| 168 } | |
| 169 | |
| 170 THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); | |
| 171 } | |
| 172 } | |
| 173 | |
| 10405 | 174 HeapWord* CollectedHeap::common_mem_allocate_init(KlassHandle klass, size_t size, TRAPS) { |
| 175 HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); | |
| 0 | 176 init_obj(obj, size); |
| 177 return obj; | |
| 178 } | |
| 179 | |
| 10405 | 180 HeapWord* CollectedHeap::allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size) { |
| 0 | 181 assert(UseTLAB, "should use UseTLAB"); |
| 182 | |
| 183 HeapWord* obj = thread->tlab().allocate(size); | |
| 184 if (obj != NULL) { | |
| 185 return obj; | |
| 186 } | |
| 187 // Otherwise... | |
| 10405 | 188 return allocate_from_tlab_slow(klass, thread, size); |
| 0 | 189 } |
| 190 | |
| 191 void CollectedHeap::init_obj(HeapWord* obj, size_t size) { | |
| 192 assert(obj != NULL, "cannot initialize NULL object"); | |
| 193 const size_t hs = oopDesc::header_size(); | |
| 194 assert(size >= hs, "unexpected object size"); | |
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195 ((oop)obj)->set_klass_gap(0); |
| 0 | 196 Copy::fill_to_aligned_words(obj + hs, size - hs); |
| 197 } | |
| 198 | |
| 199 oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { | |
| 200 debug_only(check_for_valid_allocation_state()); | |
| 201 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
| 202 assert(size >= 0, "int won't convert to size_t"); | |
| 10405 | 203 HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
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204 post_allocation_setup_obj(klass, obj, size); |
| 0 | 205 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
| 206 return (oop)obj; | |
| 207 } | |
| 208 | |
| 209 oop CollectedHeap::array_allocate(KlassHandle klass, | |
| 210 int size, | |
| 211 int length, | |
| 212 TRAPS) { | |
| 213 debug_only(check_for_valid_allocation_state()); | |
| 214 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
| 215 assert(size >= 0, "int won't convert to size_t"); | |
| 10405 | 216 HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
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217 post_allocation_setup_array(klass, obj, length); |
| 0 | 218 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
| 219 return (oop)obj; | |
| 220 } | |
| 221 | |
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222 oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
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223 int size, |
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224 int length, |
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225 TRAPS) { |
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226 debug_only(check_for_valid_allocation_state()); |
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227 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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228 assert(size >= 0, "int won't convert to size_t"); |
| 10405 | 229 HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); |
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230 ((oop)obj)->set_klass_gap(0); |
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231 post_allocation_setup_array(klass, obj, length); |
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232 #ifndef PRODUCT |
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233 const size_t hs = oopDesc::header_size()+1; |
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234 Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
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235 #endif |
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236 return (oop)obj; |
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237 } |
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238 |
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239 inline void CollectedHeap::oop_iterate_no_header(OopClosure* cl) { |
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240 NoHeaderExtendedOopClosure no_header_cl(cl); |
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241 oop_iterate(&no_header_cl); |
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242 } |
| 0 | 243 |
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244 |
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245 inline HeapWord* CollectedHeap::align_allocation_or_fail(HeapWord* addr, |
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246 HeapWord* end, |
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247 unsigned short alignment_in_bytes) { |
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248 if (alignment_in_bytes <= ObjectAlignmentInBytes) { |
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249 return addr; |
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250 } |
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251 |
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252 assert(is_ptr_aligned(addr, HeapWordSize), |
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253 err_msg("Address " PTR_FORMAT " is not properly aligned.", p2i(addr))); |
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254 assert(is_size_aligned(alignment_in_bytes, HeapWordSize), |
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255 err_msg("Alignment size %u is incorrect.", alignment_in_bytes)); |
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256 |
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257 HeapWord* new_addr = (HeapWord*) align_pointer_up(addr, alignment_in_bytes); |
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258 size_t padding = pointer_delta(new_addr, addr); |
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259 |
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260 if (padding == 0) { |
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261 return addr; |
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262 } |
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263 |
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264 if (padding < CollectedHeap::min_fill_size()) { |
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265 padding += alignment_in_bytes / HeapWordSize; |
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266 assert(padding >= CollectedHeap::min_fill_size(), |
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267 err_msg("alignment_in_bytes %u is expect to be larger " |
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268 "than the minimum object size", alignment_in_bytes)); |
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269 new_addr = addr + padding; |
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270 } |
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271 |
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272 assert(new_addr > addr, err_msg("Unexpected arithmetic overflow " |
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273 PTR_FORMAT " not greater than " PTR_FORMAT, p2i(new_addr), p2i(addr))); |
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274 if(new_addr < end) { |
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275 CollectedHeap::fill_with_object(addr, padding); |
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276 return new_addr; |
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277 } else { |
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278 return NULL; |
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279 } |
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280 } |
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281 |
| 0 | 282 #ifndef PRODUCT |
| 283 | |
| 284 inline bool | |
| 285 CollectedHeap::promotion_should_fail(volatile size_t* count) { | |
| 286 // Access to count is not atomic; the value does not have to be exact. | |
| 287 if (PromotionFailureALot) { | |
| 288 const size_t gc_num = total_collections(); | |
| 289 const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; | |
| 290 if (elapsed_gcs >= PromotionFailureALotInterval) { | |
| 291 // Test for unsigned arithmetic wrap-around. | |
| 292 if (++*count >= PromotionFailureALotCount) { | |
| 293 *count = 0; | |
| 294 return true; | |
| 295 } | |
| 296 } | |
| 297 } | |
| 298 return false; | |
| 299 } | |
| 300 | |
| 301 inline bool CollectedHeap::promotion_should_fail() { | |
| 302 return promotion_should_fail(&_promotion_failure_alot_count); | |
| 303 } | |
| 304 | |
| 305 inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { | |
| 306 if (PromotionFailureALot) { | |
| 307 _promotion_failure_alot_gc_number = total_collections(); | |
| 308 *count = 0; | |
| 309 } | |
| 310 } | |
| 311 | |
| 312 inline void CollectedHeap::reset_promotion_should_fail() { | |
| 313 reset_promotion_should_fail(&_promotion_failure_alot_count); | |
| 314 } | |
| 315 #endif // #ifndef PRODUCT | |
| 1972 | 316 |
| 317 #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |