Tue, 08 Aug 2017 15:57:29 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #ifndef SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |
aoqi@0 | 26 | #define SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |
aoqi@0 | 27 | |
aoqi@0 | 28 | #include "gc_interface/allocTracer.hpp" |
aoqi@0 | 29 | #include "gc_interface/collectedHeap.hpp" |
aoqi@0 | 30 | #include "memory/threadLocalAllocBuffer.inline.hpp" |
aoqi@0 | 31 | #include "memory/universe.hpp" |
aoqi@0 | 32 | #include "oops/arrayOop.hpp" |
aoqi@0 | 33 | #include "prims/jvmtiExport.hpp" |
aoqi@0 | 34 | #include "runtime/sharedRuntime.hpp" |
aoqi@0 | 35 | #include "runtime/thread.inline.hpp" |
aoqi@0 | 36 | #include "services/lowMemoryDetector.hpp" |
aoqi@0 | 37 | #include "utilities/copy.hpp" |
aoqi@0 | 38 | |
aoqi@0 | 39 | // Inline allocation implementations. |
aoqi@0 | 40 | |
aoqi@0 | 41 | void CollectedHeap::post_allocation_setup_common(KlassHandle klass, |
aoqi@0 | 42 | HeapWord* obj) { |
aoqi@0 | 43 | post_allocation_setup_no_klass_install(klass, obj); |
aoqi@0 | 44 | post_allocation_install_obj_klass(klass, oop(obj)); |
aoqi@0 | 45 | } |
aoqi@0 | 46 | |
aoqi@0 | 47 | void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, |
aoqi@0 | 48 | HeapWord* objPtr) { |
aoqi@0 | 49 | oop obj = (oop)objPtr; |
aoqi@0 | 50 | |
aoqi@0 | 51 | assert(obj != NULL, "NULL object pointer"); |
aoqi@0 | 52 | if (UseBiasedLocking && (klass() != NULL)) { |
aoqi@0 | 53 | obj->set_mark(klass->prototype_header()); |
aoqi@0 | 54 | } else { |
aoqi@0 | 55 | // May be bootstrapping |
aoqi@0 | 56 | obj->set_mark(markOopDesc::prototype()); |
aoqi@0 | 57 | } |
aoqi@0 | 58 | } |
aoqi@0 | 59 | |
aoqi@0 | 60 | void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, |
aoqi@0 | 61 | oop obj) { |
aoqi@0 | 62 | // These asserts are kind of complicated because of klassKlass |
aoqi@0 | 63 | // and the beginning of the world. |
aoqi@0 | 64 | assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); |
aoqi@0 | 65 | assert(klass() == NULL || klass()->is_klass(), "not a klass"); |
aoqi@0 | 66 | assert(obj != NULL, "NULL object pointer"); |
aoqi@0 | 67 | obj->set_klass(klass()); |
aoqi@0 | 68 | assert(!Universe::is_fully_initialized() || obj->klass() != NULL, |
aoqi@0 | 69 | "missing klass"); |
aoqi@0 | 70 | } |
aoqi@0 | 71 | |
aoqi@0 | 72 | // Support for jvmti and dtrace |
aoqi@0 | 73 | inline void post_allocation_notify(KlassHandle klass, oop obj, int size) { |
aoqi@0 | 74 | // support low memory notifications (no-op if not enabled) |
aoqi@0 | 75 | LowMemoryDetector::detect_low_memory_for_collected_pools(); |
aoqi@0 | 76 | |
aoqi@0 | 77 | // support for JVMTI VMObjectAlloc event (no-op if not enabled) |
aoqi@0 | 78 | JvmtiExport::vm_object_alloc_event_collector(obj); |
aoqi@0 | 79 | |
aoqi@0 | 80 | if (DTraceAllocProbes) { |
aoqi@0 | 81 | // support for Dtrace object alloc event (no-op most of the time) |
aoqi@0 | 82 | if (klass() != NULL && klass()->name() != NULL) { |
aoqi@0 | 83 | SharedRuntime::dtrace_object_alloc(obj, size); |
aoqi@0 | 84 | } |
aoqi@0 | 85 | } |
aoqi@0 | 86 | } |
aoqi@0 | 87 | |
aoqi@0 | 88 | void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, |
aoqi@0 | 89 | HeapWord* obj, |
aoqi@0 | 90 | int size) { |
aoqi@0 | 91 | post_allocation_setup_common(klass, obj); |
aoqi@0 | 92 | assert(Universe::is_bootstrapping() || |
aoqi@0 | 93 | !((oop)obj)->is_array(), "must not be an array"); |
aoqi@0 | 94 | // notify jvmti and dtrace |
aoqi@0 | 95 | post_allocation_notify(klass, (oop)obj, size); |
aoqi@0 | 96 | } |
aoqi@0 | 97 | |
aoqi@0 | 98 | void CollectedHeap::post_allocation_setup_array(KlassHandle klass, |
aoqi@0 | 99 | HeapWord* obj, |
aoqi@0 | 100 | int length) { |
aoqi@0 | 101 | // Set array length before setting the _klass field |
aoqi@0 | 102 | // in post_allocation_setup_common() because the klass field |
aoqi@0 | 103 | // indicates that the object is parsable by concurrent GC. |
aoqi@0 | 104 | assert(length >= 0, "length should be non-negative"); |
aoqi@0 | 105 | ((arrayOop)obj)->set_length(length); |
aoqi@0 | 106 | post_allocation_setup_common(klass, obj); |
aoqi@0 | 107 | oop new_obj = (oop)obj; |
aoqi@0 | 108 | assert(new_obj->is_array(), "must be an array"); |
aoqi@0 | 109 | // notify jvmti and dtrace (must be after length is set for dtrace) |
aoqi@0 | 110 | post_allocation_notify(klass, new_obj, new_obj->size()); |
aoqi@0 | 111 | } |
aoqi@0 | 112 | |
aoqi@0 | 113 | HeapWord* CollectedHeap::common_mem_allocate_noinit(KlassHandle klass, size_t size, TRAPS) { |
aoqi@0 | 114 | |
aoqi@0 | 115 | // Clear unhandled oops for memory allocation. Memory allocation might |
aoqi@0 | 116 | // not take out a lock if from tlab, so clear here. |
aoqi@0 | 117 | CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) |
aoqi@0 | 118 | |
aoqi@0 | 119 | if (HAS_PENDING_EXCEPTION) { |
aoqi@0 | 120 | NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); |
aoqi@0 | 121 | return NULL; // caller does a CHECK_0 too |
aoqi@0 | 122 | } |
aoqi@0 | 123 | |
aoqi@0 | 124 | HeapWord* result = NULL; |
aoqi@0 | 125 | if (UseTLAB) { |
aoqi@0 | 126 | result = allocate_from_tlab(klass, THREAD, size); |
aoqi@0 | 127 | if (result != NULL) { |
aoqi@0 | 128 | assert(!HAS_PENDING_EXCEPTION, |
aoqi@0 | 129 | "Unexpected exception, will result in uninitialized storage"); |
aoqi@0 | 130 | return result; |
aoqi@0 | 131 | } |
aoqi@0 | 132 | } |
aoqi@0 | 133 | bool gc_overhead_limit_was_exceeded = false; |
aoqi@0 | 134 | result = Universe::heap()->mem_allocate(size, |
aoqi@0 | 135 | &gc_overhead_limit_was_exceeded); |
aoqi@0 | 136 | if (result != NULL) { |
aoqi@0 | 137 | NOT_PRODUCT(Universe::heap()-> |
aoqi@0 | 138 | check_for_non_bad_heap_word_value(result, size)); |
aoqi@0 | 139 | assert(!HAS_PENDING_EXCEPTION, |
aoqi@0 | 140 | "Unexpected exception, will result in uninitialized storage"); |
aoqi@0 | 141 | THREAD->incr_allocated_bytes(size * HeapWordSize); |
aoqi@0 | 142 | |
aoqi@0 | 143 | AllocTracer::send_allocation_outside_tlab_event(klass, size * HeapWordSize); |
aoqi@0 | 144 | |
aoqi@0 | 145 | return result; |
aoqi@0 | 146 | } |
aoqi@0 | 147 | |
aoqi@0 | 148 | |
aoqi@0 | 149 | if (!gc_overhead_limit_was_exceeded) { |
aoqi@0 | 150 | // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
aoqi@0 | 151 | report_java_out_of_memory("Java heap space"); |
aoqi@0 | 152 | |
aoqi@0 | 153 | if (JvmtiExport::should_post_resource_exhausted()) { |
aoqi@0 | 154 | JvmtiExport::post_resource_exhausted( |
aoqi@0 | 155 | JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, |
aoqi@0 | 156 | "Java heap space"); |
aoqi@0 | 157 | } |
aoqi@0 | 158 | |
aoqi@0 | 159 | THROW_OOP_0(Universe::out_of_memory_error_java_heap()); |
aoqi@0 | 160 | } else { |
aoqi@0 | 161 | // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
aoqi@0 | 162 | report_java_out_of_memory("GC overhead limit exceeded"); |
aoqi@0 | 163 | |
aoqi@0 | 164 | if (JvmtiExport::should_post_resource_exhausted()) { |
aoqi@0 | 165 | JvmtiExport::post_resource_exhausted( |
aoqi@0 | 166 | JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, |
aoqi@0 | 167 | "GC overhead limit exceeded"); |
aoqi@0 | 168 | } |
aoqi@0 | 169 | |
aoqi@0 | 170 | THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); |
aoqi@0 | 171 | } |
aoqi@0 | 172 | } |
aoqi@0 | 173 | |
aoqi@0 | 174 | HeapWord* CollectedHeap::common_mem_allocate_init(KlassHandle klass, size_t size, TRAPS) { |
aoqi@0 | 175 | HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); |
aoqi@0 | 176 | init_obj(obj, size); |
aoqi@0 | 177 | return obj; |
aoqi@0 | 178 | } |
aoqi@0 | 179 | |
aoqi@0 | 180 | HeapWord* CollectedHeap::allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size) { |
aoqi@0 | 181 | assert(UseTLAB, "should use UseTLAB"); |
aoqi@0 | 182 | |
aoqi@0 | 183 | HeapWord* obj = thread->tlab().allocate(size); |
aoqi@0 | 184 | if (obj != NULL) { |
aoqi@0 | 185 | return obj; |
aoqi@0 | 186 | } |
aoqi@0 | 187 | // Otherwise... |
aoqi@0 | 188 | return allocate_from_tlab_slow(klass, thread, size); |
aoqi@0 | 189 | } |
aoqi@0 | 190 | |
aoqi@0 | 191 | void CollectedHeap::init_obj(HeapWord* obj, size_t size) { |
aoqi@0 | 192 | assert(obj != NULL, "cannot initialize NULL object"); |
aoqi@0 | 193 | const size_t hs = oopDesc::header_size(); |
aoqi@0 | 194 | assert(size >= hs, "unexpected object size"); |
aoqi@0 | 195 | ((oop)obj)->set_klass_gap(0); |
aoqi@0 | 196 | Copy::fill_to_aligned_words(obj + hs, size - hs); |
aoqi@0 | 197 | } |
aoqi@0 | 198 | |
aoqi@0 | 199 | oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { |
aoqi@0 | 200 | debug_only(check_for_valid_allocation_state()); |
aoqi@0 | 201 | assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
aoqi@0 | 202 | assert(size >= 0, "int won't convert to size_t"); |
aoqi@0 | 203 | HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
aoqi@0 | 204 | post_allocation_setup_obj(klass, obj, size); |
aoqi@0 | 205 | NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
aoqi@0 | 206 | return (oop)obj; |
aoqi@0 | 207 | } |
aoqi@0 | 208 | |
aoqi@0 | 209 | oop CollectedHeap::array_allocate(KlassHandle klass, |
aoqi@0 | 210 | int size, |
aoqi@0 | 211 | int length, |
aoqi@0 | 212 | TRAPS) { |
aoqi@0 | 213 | debug_only(check_for_valid_allocation_state()); |
aoqi@0 | 214 | assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
aoqi@0 | 215 | assert(size >= 0, "int won't convert to size_t"); |
aoqi@0 | 216 | HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
aoqi@0 | 217 | post_allocation_setup_array(klass, obj, length); |
aoqi@0 | 218 | NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
aoqi@0 | 219 | return (oop)obj; |
aoqi@0 | 220 | } |
aoqi@0 | 221 | |
aoqi@0 | 222 | oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
aoqi@0 | 223 | int size, |
aoqi@0 | 224 | int length, |
aoqi@0 | 225 | TRAPS) { |
aoqi@0 | 226 | debug_only(check_for_valid_allocation_state()); |
aoqi@0 | 227 | assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
aoqi@0 | 228 | assert(size >= 0, "int won't convert to size_t"); |
aoqi@0 | 229 | HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); |
aoqi@0 | 230 | ((oop)obj)->set_klass_gap(0); |
aoqi@0 | 231 | post_allocation_setup_array(klass, obj, length); |
aoqi@0 | 232 | #ifndef PRODUCT |
aoqi@0 | 233 | const size_t hs = oopDesc::header_size()+1; |
aoqi@0 | 234 | Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
aoqi@0 | 235 | #endif |
aoqi@0 | 236 | return (oop)obj; |
aoqi@0 | 237 | } |
aoqi@0 | 238 | |
aoqi@0 | 239 | inline void CollectedHeap::oop_iterate_no_header(OopClosure* cl) { |
aoqi@0 | 240 | NoHeaderExtendedOopClosure no_header_cl(cl); |
aoqi@0 | 241 | oop_iterate(&no_header_cl); |
aoqi@0 | 242 | } |
aoqi@0 | 243 | |
aoqi@0 | 244 | #ifndef PRODUCT |
aoqi@0 | 245 | |
aoqi@0 | 246 | inline bool |
aoqi@0 | 247 | CollectedHeap::promotion_should_fail(volatile size_t* count) { |
aoqi@0 | 248 | // Access to count is not atomic; the value does not have to be exact. |
aoqi@0 | 249 | if (PromotionFailureALot) { |
aoqi@0 | 250 | const size_t gc_num = total_collections(); |
aoqi@0 | 251 | const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; |
aoqi@0 | 252 | if (elapsed_gcs >= PromotionFailureALotInterval) { |
aoqi@0 | 253 | // Test for unsigned arithmetic wrap-around. |
aoqi@0 | 254 | if (++*count >= PromotionFailureALotCount) { |
aoqi@0 | 255 | *count = 0; |
aoqi@0 | 256 | return true; |
aoqi@0 | 257 | } |
aoqi@0 | 258 | } |
aoqi@0 | 259 | } |
aoqi@0 | 260 | return false; |
aoqi@0 | 261 | } |
aoqi@0 | 262 | |
aoqi@0 | 263 | inline bool CollectedHeap::promotion_should_fail() { |
aoqi@0 | 264 | return promotion_should_fail(&_promotion_failure_alot_count); |
aoqi@0 | 265 | } |
aoqi@0 | 266 | |
aoqi@0 | 267 | inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { |
aoqi@0 | 268 | if (PromotionFailureALot) { |
aoqi@0 | 269 | _promotion_failure_alot_gc_number = total_collections(); |
aoqi@0 | 270 | *count = 0; |
aoqi@0 | 271 | } |
aoqi@0 | 272 | } |
aoqi@0 | 273 | |
aoqi@0 | 274 | inline void CollectedHeap::reset_promotion_should_fail() { |
aoqi@0 | 275 | reset_promotion_should_fail(&_promotion_failure_alot_count); |
aoqi@0 | 276 | } |
aoqi@0 | 277 | #endif // #ifndef PRODUCT |
aoqi@0 | 278 | |
aoqi@0 | 279 | #endif // SHARE_VM_GC_INTERFACE_COLLECTEDHEAP_INLINE_HPP |