Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/vmGCOperations.hpp @ 2225:c798c277ddd1
7015169: GC Cause not always set
Summary: Sometimes the gc cause was not always set. This caused JStat to print the wrong information.
Reviewed-by: tonyp, ysr
Contributed-by: suenaga.yasumasa@oss.ntt.co.jp
| author | brutisso |
|---|---|
| date | Thu, 03 Feb 2011 20:49:09 -0800 |
| parents | 7246a374a9f2 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2225 | 2 * Copyright (c) 2005, 2011, 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_IMPLEMENTATION_SHARED_VMGCOPERATIONS_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_VMGCOPERATIONS_HPP | |
| 27 | |
| 28 #include "memory/heapInspection.hpp" | |
| 29 #include "runtime/handles.hpp" | |
| 30 #include "runtime/jniHandles.hpp" | |
| 31 #include "runtime/synchronizer.hpp" | |
| 32 #include "runtime/vm_operations.hpp" | |
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33 #include "prims/jvmtiExport.hpp" |
| 1972 | 34 |
| 0 | 35 // The following class hierarchy represents |
| 36 // a set of operations (VM_Operation) related to GC. | |
| 37 // | |
| 38 // VM_Operation | |
| 39 // VM_GC_Operation | |
| 40 // VM_GC_HeapInspection | |
| 41 // VM_GenCollectForAllocation | |
| 42 // VM_GenCollectFull | |
| 43 // VM_GenCollectFullConcurrent | |
| 44 // VM_ParallelGCFailedAllocation | |
| 45 // VM_ParallelGCFailedPermanentAllocation | |
| 46 // VM_ParallelGCSystemGC | |
| 47 // VM_GC_Operation | |
| 48 // - implements methods common to all classes in the hierarchy: | |
| 49 // prevents multiple gc requests and manages lock on heap; | |
| 50 // | |
| 51 // VM_GC_HeapInspection | |
| 52 // - prints class histogram on SIGBREAK if PrintClassHistogram | |
| 53 // is specified; and also the attach "inspectheap" operation | |
| 54 // | |
| 55 // VM_GenCollectForAllocation | |
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56 // VM_GenCollectForPermanentAllocation |
| 0 | 57 // VM_ParallelGCFailedAllocation |
| 58 // VM_ParallelGCFailedPermanentAllocation | |
| 59 // - this operation is invoked when allocation is failed; | |
| 60 // operation performs garbage collection and tries to | |
| 61 // allocate afterwards; | |
| 62 // | |
| 63 // VM_GenCollectFull | |
| 64 // VM_GenCollectFullConcurrent | |
| 65 // VM_ParallelGCSystemGC | |
| 66 // - these operations preform full collection of heaps of | |
| 67 // different kind | |
| 68 // | |
| 69 | |
| 70 class VM_GC_Operation: public VM_Operation { | |
| 71 protected: | |
| 72 BasicLock _pending_list_basic_lock; // for refs pending list notification (PLL) | |
| 73 unsigned int _gc_count_before; // gc count before acquiring PLL | |
| 74 unsigned int _full_gc_count_before; // full gc count before acquiring PLL | |
| 75 bool _full; // whether a "full" collection | |
| 76 bool _prologue_succeeded; // whether doit_prologue succeeded | |
| 77 GCCause::Cause _gc_cause; // the putative cause for this gc op | |
| 78 bool _gc_locked; // will be set if gc was locked | |
| 79 | |
| 80 virtual bool skip_operation() const; | |
| 81 | |
| 82 // java.lang.ref.Reference support | |
| 83 void acquire_pending_list_lock(); | |
| 84 void release_and_notify_pending_list_lock(); | |
| 85 | |
| 86 public: | |
| 87 VM_GC_Operation(unsigned int gc_count_before, | |
| 2225 | 88 GCCause::Cause _cause, |
| 0 | 89 unsigned int full_gc_count_before = 0, |
| 90 bool full = false) { | |
| 91 _full = full; | |
| 92 _prologue_succeeded = false; | |
| 93 _gc_count_before = gc_count_before; | |
| 94 | |
| 95 // A subclass constructor will likely overwrite the following | |
| 2225 | 96 _gc_cause = _cause; |
| 0 | 97 |
| 98 _gc_locked = false; | |
| 99 | |
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100 _full_gc_count_before = full_gc_count_before; |
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101 // In ParallelScavengeHeap::mem_allocate() collections can be |
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102 // executed within a loop and _all_soft_refs_clear can be set |
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103 // true after they have been cleared by a collection and another |
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104 // collection started so that _all_soft_refs_clear can be true |
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105 // when this collection is started. Don't assert that |
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106 // _all_soft_refs_clear have to be false here even though |
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107 // mutators have run. Soft refs will be cleared again in this |
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108 // collection. |
| 0 | 109 } |
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110 ~VM_GC_Operation() { |
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111 CollectedHeap* ch = Universe::heap(); |
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112 ch->collector_policy()->set_all_soft_refs_clear(false); |
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113 } |
| 0 | 114 |
| 115 // Acquire the reference synchronization lock | |
| 116 virtual bool doit_prologue(); | |
| 117 // Do notifyAll (if needed) and release held lock | |
| 118 virtual void doit_epilogue(); | |
| 119 | |
| 120 virtual bool allow_nested_vm_operations() const { return true; } | |
| 121 bool prologue_succeeded() const { return _prologue_succeeded; } | |
| 122 | |
| 123 void set_gc_locked() { _gc_locked = true; } | |
| 124 bool gc_locked() const { return _gc_locked; } | |
| 125 | |
| 126 static void notify_gc_begin(bool full = false); | |
| 127 static void notify_gc_end(); | |
| 128 }; | |
| 129 | |
| 130 | |
| 131 class VM_GC_HeapInspection: public VM_GC_Operation { | |
| 132 private: | |
| 133 outputStream* _out; | |
| 134 bool _full_gc; | |
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135 bool _need_prologue; |
| 0 | 136 public: |
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137 VM_GC_HeapInspection(outputStream* out, bool request_full_gc, |
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138 bool need_prologue) : |
| 0 | 139 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
| 2225 | 140 GCCause::_heap_inspection /* GC Cause */, |
| 0 | 141 0 /* total full collections, dummy, ignored */, |
| 142 request_full_gc) { | |
| 143 _out = out; | |
| 144 _full_gc = request_full_gc; | |
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145 _need_prologue = need_prologue; |
| 0 | 146 } |
| 147 | |
| 148 ~VM_GC_HeapInspection() {} | |
| 149 virtual VMOp_Type type() const { return VMOp_GC_HeapInspection; } | |
| 150 virtual bool skip_operation() const; | |
| 151 virtual bool doit_prologue(); | |
| 152 virtual void doit(); | |
| 153 }; | |
| 154 | |
| 155 | |
| 156 class VM_GenCollectForAllocation: public VM_GC_Operation { | |
| 157 private: | |
| 158 HeapWord* _res; | |
| 159 size_t _size; // size of object to be allocated. | |
| 160 bool _tlab; // alloc is of a tlab. | |
| 161 public: | |
| 162 VM_GenCollectForAllocation(size_t size, | |
| 163 bool tlab, | |
| 164 unsigned int gc_count_before) | |
| 2225 | 165 : VM_GC_Operation(gc_count_before, GCCause::_allocation_failure), |
| 0 | 166 _size(size), |
| 167 _tlab(tlab) { | |
| 168 _res = NULL; | |
| 169 } | |
| 170 ~VM_GenCollectForAllocation() {} | |
| 171 virtual VMOp_Type type() const { return VMOp_GenCollectForAllocation; } | |
| 172 virtual void doit(); | |
| 173 HeapWord* result() const { return _res; } | |
| 174 }; | |
| 175 | |
| 176 | |
| 177 // VM operation to invoke a collection of the heap as a | |
| 178 // GenCollectedHeap heap. | |
| 179 class VM_GenCollectFull: public VM_GC_Operation { | |
| 180 private: | |
| 181 int _max_level; | |
| 182 public: | |
| 183 VM_GenCollectFull(unsigned int gc_count_before, | |
| 184 unsigned int full_gc_count_before, | |
| 185 GCCause::Cause gc_cause, | |
| 186 int max_level) | |
| 2225 | 187 : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true /* full */), |
| 188 _max_level(max_level) { } | |
| 0 | 189 ~VM_GenCollectFull() {} |
| 190 virtual VMOp_Type type() const { return VMOp_GenCollectFull; } | |
| 191 virtual void doit(); | |
| 192 }; | |
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193 |
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194 class VM_GenCollectForPermanentAllocation: public VM_GC_Operation { |
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195 private: |
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196 HeapWord* _res; |
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197 size_t _size; // size of object to be allocated |
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198 public: |
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199 VM_GenCollectForPermanentAllocation(size_t size, |
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200 unsigned int gc_count_before, |
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201 unsigned int full_gc_count_before, |
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202 GCCause::Cause gc_cause) |
| 2225 | 203 : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true), |
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204 _size(size) { |
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205 _res = NULL; |
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206 _gc_cause = gc_cause; |
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207 } |
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208 ~VM_GenCollectForPermanentAllocation() {} |
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209 virtual VMOp_Type type() const { return VMOp_GenCollectForPermanentAllocation; } |
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210 virtual void doit(); |
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211 HeapWord* result() const { return _res; } |
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212 }; |
| 1972 | 213 |
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214 class SvcGCMarker : public StackObj { |
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215 private: |
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216 JvmtiGCMarker _jgcm; |
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217 public: |
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218 typedef enum { MINOR, FULL, OTHER } reason_type; |
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219 |
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220 SvcGCMarker(reason_type reason ) { |
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221 VM_GC_Operation::notify_gc_begin(reason == FULL); |
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222 } |
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223 |
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224 ~SvcGCMarker() { |
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225 VM_GC_Operation::notify_gc_end(); |
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226 } |
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227 }; |
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228 |
| 1972 | 229 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_VMGCOPERATIONS_HPP |