rev 8854 : 8065331: Add trace events for failed allocations Reviewed-by:
1 /* 2 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_GC_SHARED_VMGCOPERATIONS_HPP 26 #define SHARE_VM_GC_SHARED_VMGCOPERATIONS_HPP 27 28 #include "gc/shared/collectedHeap.hpp" 29 #include "gc/shared/gcId.hpp" 30 #include "gc/shared/genCollectedHeap.hpp" 31 #include "memory/heapInspection.hpp" 32 #include "prims/jvmtiExport.hpp" 33 #include "runtime/handles.hpp" 34 #include "runtime/jniHandles.hpp" 35 #include "runtime/synchronizer.hpp" 36 #include "runtime/vm_operations.hpp" 37 38 // The following class hierarchy represents 39 // a set of operations (VM_Operation) related to GC. 40 // 41 // VM_Operation 42 // VM_GC_Operation 43 // VM_GC_HeapInspection 44 // VM_GenCollectFull 45 // VM_GenCollectFullConcurrent 46 // VM_ParallelGCSystemGC 47 // VM_CollectForAllocation 48 // VM_GenCollectForAllocation 49 // VM_ParallelGCFailedAllocation 50 // VM_GC_Operation 51 // - implements methods common to all classes in the hierarchy: 52 // prevents multiple gc requests and manages lock on heap; 53 // 54 // VM_GC_HeapInspection 55 // - prints class histogram on SIGBREAK if PrintClassHistogram 56 // is specified; and also the attach "inspectheap" operation 57 // 58 // VM_CollectForAllocation 59 // VM_GenCollectForAllocation 60 // VM_ParallelGCFailedAllocation 61 // - this operation is invoked when allocation is failed; 62 // operation performs garbage collection and tries to 63 // allocate afterwards; 64 // 65 // VM_GenCollectFull 66 // VM_GenCollectFullConcurrent 67 // VM_ParallelGCSystemGC 68 // - these operations preform full collection of heaps of 69 // different kind 70 // 71 72 class VM_GC_Operation: public VM_Operation { 73 protected: 74 BasicLock _pending_list_basic_lock; // for refs pending list notification (PLL) 75 uint _gc_count_before; // gc count before acquiring PLL 76 uint _full_gc_count_before; // full gc count before acquiring PLL 77 bool _full; // whether a "full" collection 78 bool _prologue_succeeded; // whether doit_prologue succeeded 79 GCCause::Cause _gc_cause; // the putative cause for this gc op 80 bool _gc_locked; // will be set if gc was locked 81 82 virtual bool skip_operation() const; 83 84 // java.lang.ref.Reference support 85 void acquire_pending_list_lock(); 86 void release_and_notify_pending_list_lock(); 87 88 public: 89 VM_GC_Operation(uint gc_count_before, 90 GCCause::Cause _cause, 91 uint full_gc_count_before = 0, 92 bool full = false) { 93 _full = full; 94 _prologue_succeeded = false; 95 _gc_count_before = gc_count_before; 96 97 // A subclass constructor will likely overwrite the following 98 _gc_cause = _cause; 99 100 _gc_locked = false; 101 102 _full_gc_count_before = full_gc_count_before; 103 // In ParallelScavengeHeap::mem_allocate() collections can be 104 // executed within a loop and _all_soft_refs_clear can be set 105 // true after they have been cleared by a collection and another 106 // collection started so that _all_soft_refs_clear can be true 107 // when this collection is started. Don't assert that 108 // _all_soft_refs_clear have to be false here even though 109 // mutators have run. Soft refs will be cleared again in this 110 // collection. 111 } 112 ~VM_GC_Operation(); 113 114 // Acquire the reference synchronization lock 115 virtual bool doit_prologue(); 116 // Do notifyAll (if needed) and release held lock 117 virtual void doit_epilogue(); 118 119 virtual bool allow_nested_vm_operations() const { return true; } 120 bool prologue_succeeded() const { return _prologue_succeeded; } 121 122 void set_gc_locked() { _gc_locked = true; } 123 bool gc_locked() const { return _gc_locked; } 124 125 static void notify_gc_begin(bool full = false); 126 static void notify_gc_end(); 127 }; 128 129 130 class VM_GC_HeapInspection: public VM_GC_Operation { 131 private: 132 outputStream* _out; 133 bool _full_gc; 134 bool _csv_format; // "comma separated values" format for spreadsheet. 135 bool _print_help; 136 bool _print_class_stats; 137 const char* _columns; 138 public: 139 VM_GC_HeapInspection(outputStream* out, bool request_full_gc) : 140 VM_GC_Operation(0 /* total collections, dummy, ignored */, 141 GCCause::_heap_inspection /* GC Cause */, 142 0 /* total full collections, dummy, ignored */, 143 request_full_gc) { 144 _out = out; 145 _full_gc = request_full_gc; 146 _csv_format = false; 147 _print_help = false; 148 _print_class_stats = false; 149 _columns = NULL; 150 } 151 152 ~VM_GC_HeapInspection() {} 153 virtual VMOp_Type type() const { return VMOp_GC_HeapInspection; } 154 virtual bool skip_operation() const; 155 virtual void doit(); 156 void set_csv_format(bool value) {_csv_format = value;} 157 void set_print_help(bool value) {_print_help = value;} 158 void set_print_class_stats(bool value) {_print_class_stats = value;} 159 void set_columns(const char* value) {_columns = value;} 160 protected: 161 bool collect(); 162 }; 163 164 class VM_CollectForAllocation : public VM_GC_Operation { 165 protected: 166 size_t _word_size; // Size of object to be allocated (in number of words) 167 HeapWord* _result; // Allocation result (NULL if allocation failed) 168 169 public: 170 VM_CollectForAllocation(size_t word_size, uint gc_count_before, GCCause::Cause cause); 171 172 HeapWord* result() const { 173 return _result; 174 } 175 }; 176 177 class VM_GenCollectForAllocation : public VM_CollectForAllocation { 178 private: 179 bool _tlab; // alloc is of a tlab. 180 public: 181 VM_GenCollectForAllocation(size_t word_size, 182 bool tlab, 183 uint gc_count_before) 184 : VM_CollectForAllocation(word_size, gc_count_before, GCCause::_allocation_failure), 185 _tlab(tlab) { 186 assert(word_size != 0, "An allocation should always be requested with this operation."); 187 } 188 ~VM_GenCollectForAllocation() {} 189 virtual VMOp_Type type() const { return VMOp_GenCollectForAllocation; } 190 virtual void doit(); 191 }; 192 193 // VM operation to invoke a collection of the heap as a 194 // GenCollectedHeap heap. 195 class VM_GenCollectFull: public VM_GC_Operation { 196 private: 197 GenCollectedHeap::GenerationType _max_generation; 198 public: 199 VM_GenCollectFull(uint gc_count_before, 200 uint full_gc_count_before, 201 GCCause::Cause gc_cause, 202 GenCollectedHeap::GenerationType max_generation) 203 : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true /* full */), 204 _max_generation(max_generation) { } 205 ~VM_GenCollectFull() {} 206 virtual VMOp_Type type() const { return VMOp_GenCollectFull; } 207 virtual void doit(); 208 }; 209 210 class VM_CollectForMetadataAllocation: public VM_GC_Operation { 211 private: 212 MetaWord* _result; 213 size_t _size; // size of object to be allocated 214 Metaspace::MetadataType _mdtype; 215 ClassLoaderData* _loader_data; 216 public: 217 VM_CollectForMetadataAllocation(ClassLoaderData* loader_data, 218 size_t size, Metaspace::MetadataType mdtype, 219 uint gc_count_before, 220 uint full_gc_count_before, 221 GCCause::Cause gc_cause); 222 virtual VMOp_Type type() const { return VMOp_CollectForMetadataAllocation; } 223 virtual void doit(); 224 MetaWord* result() const { return _result; } 225 226 bool initiate_concurrent_GC(); 227 }; 228 229 class SvcGCMarker : public StackObj { 230 private: 231 JvmtiGCMarker _jgcm; 232 public: 233 typedef enum { MINOR, FULL, OTHER } reason_type; 234 235 SvcGCMarker(reason_type reason ) { 236 VM_GC_Operation::notify_gc_begin(reason == FULL); 237 } 238 239 ~SvcGCMarker() { 240 VM_GC_Operation::notify_gc_end(); 241 } 242 }; 243 244 #endif // SHARE_VM_GC_SHARED_VMGCOPERATIONS_HPP --- EOF ---