Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/vmGCOperations.cpp @ 615:c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
| author | ysr |
|---|---|
| date | Mon, 02 Mar 2009 16:37:04 -0800 |
| parents | 1ee8caae33af |
| children | bdb5361c461c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2005-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 # include "incls/_precompiled.incl" | |
| 25 # include "incls/_vmGCOperations.cpp.incl" | |
| 26 | |
| 27 HS_DTRACE_PROBE_DECL1(hotspot, gc__begin, bool); | |
| 28 HS_DTRACE_PROBE_DECL(hotspot, gc__end); | |
| 29 | |
| 30 // The same dtrace probe can't be inserted in two different files, so we | |
| 31 // have to call it here, so it's only in one file. Can't create new probes | |
| 32 // for the other file anymore. The dtrace probes have to remain stable. | |
| 33 void VM_GC_Operation::notify_gc_begin(bool full) { | |
| 34 HS_DTRACE_PROBE1(hotspot, gc__begin, full); | |
| 35 } | |
| 36 | |
| 37 void VM_GC_Operation::notify_gc_end() { | |
| 38 HS_DTRACE_PROBE(hotspot, gc__end); | |
| 39 } | |
| 40 | |
| 41 void VM_GC_Operation::acquire_pending_list_lock() { | |
| 42 // we may enter this with pending exception set | |
| 43 instanceRefKlass::acquire_pending_list_lock(&_pending_list_basic_lock); | |
| 44 } | |
| 45 | |
| 46 | |
| 47 void VM_GC_Operation::release_and_notify_pending_list_lock() { | |
| 48 | |
| 49 instanceRefKlass::release_and_notify_pending_list_lock(&_pending_list_basic_lock); | |
| 50 } | |
| 51 | |
| 52 // Allocations may fail in several threads at about the same time, | |
| 53 // resulting in multiple gc requests. We only want to do one of them. | |
| 54 // In case a GC locker is active and the need for a GC is already signalled, | |
| 55 // we want to skip this GC attempt altogether, without doing a futile | |
| 56 // safepoint operation. | |
| 57 bool VM_GC_Operation::skip_operation() const { | |
| 58 bool skip = (_gc_count_before != Universe::heap()->total_collections()); | |
| 59 if (_full && skip) { | |
| 60 skip = (_full_gc_count_before != Universe::heap()->total_full_collections()); | |
| 61 } | |
| 62 if (!skip && GC_locker::is_active_and_needs_gc()) { | |
| 63 skip = Universe::heap()->is_maximal_no_gc(); | |
| 64 assert(!(skip && (_gc_cause == GCCause::_gc_locker)), | |
| 65 "GC_locker cannot be active when initiating GC"); | |
| 66 } | |
| 67 return skip; | |
| 68 } | |
| 69 | |
| 70 bool VM_GC_Operation::doit_prologue() { | |
| 71 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 72 | |
| 73 acquire_pending_list_lock(); | |
| 74 // If the GC count has changed someone beat us to the collection | |
| 75 // Get the Heap_lock after the pending_list_lock. | |
| 76 Heap_lock->lock(); | |
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77 |
| 0 | 78 // Check invocations |
| 79 if (skip_operation()) { | |
| 80 // skip collection | |
| 81 Heap_lock->unlock(); | |
| 82 release_and_notify_pending_list_lock(); | |
| 83 _prologue_succeeded = false; | |
| 84 } else { | |
| 85 _prologue_succeeded = true; | |
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86 SharedHeap* sh = SharedHeap::heap(); |
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87 if (sh != NULL) sh->_thread_holds_heap_lock_for_gc = true; |
| 0 | 88 } |
| 89 return _prologue_succeeded; | |
| 90 } | |
| 91 | |
| 92 | |
| 93 void VM_GC_Operation::doit_epilogue() { | |
| 94 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 95 // Release the Heap_lock first. | |
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96 SharedHeap* sh = SharedHeap::heap(); |
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97 if (sh != NULL) sh->_thread_holds_heap_lock_for_gc = false; |
| 0 | 98 Heap_lock->unlock(); |
| 99 release_and_notify_pending_list_lock(); | |
| 100 } | |
| 101 | |
| 102 bool VM_GC_HeapInspection::doit_prologue() { | |
| 103 if (Universe::heap()->supports_heap_inspection()) { | |
| 104 return VM_GC_Operation::doit_prologue(); | |
| 105 } else { | |
| 106 return false; | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 bool VM_GC_HeapInspection::skip_operation() const { | |
| 111 assert(Universe::heap()->supports_heap_inspection(), "huh?"); | |
| 112 return false; | |
| 113 } | |
| 114 | |
| 115 void VM_GC_HeapInspection::doit() { | |
| 116 HandleMark hm; | |
| 117 CollectedHeap* ch = Universe::heap(); | |
| 118 if (_full_gc) { | |
| 119 ch->collect_as_vm_thread(GCCause::_heap_inspection); | |
| 120 } else { | |
| 121 // make the heap parsable (no need to retire TLABs) | |
| 122 ch->ensure_parsability(false); | |
| 123 } | |
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124 HeapInspection::heap_inspection(_out, _need_prologue /* need_prologue */); |
| 0 | 125 } |
| 126 | |
| 127 | |
| 128 void VM_GenCollectForAllocation::doit() { | |
| 129 JvmtiGCForAllocationMarker jgcm; | |
| 130 notify_gc_begin(false); | |
| 131 | |
| 132 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 133 GCCauseSetter gccs(gch, _gc_cause); | |
| 134 _res = gch->satisfy_failed_allocation(_size, _tlab); | |
| 135 assert(gch->is_in_reserved_or_null(_res), "result not in heap"); | |
| 136 | |
| 137 if (_res == NULL && GC_locker::is_active_and_needs_gc()) { | |
| 138 set_gc_locked(); | |
| 139 } | |
| 140 notify_gc_end(); | |
| 141 } | |
| 142 | |
| 143 void VM_GenCollectFull::doit() { | |
| 144 JvmtiGCFullMarker jgcm; | |
| 145 notify_gc_begin(true); | |
| 146 | |
| 147 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 148 GCCauseSetter gccs(gch, _gc_cause); | |
| 149 gch->do_full_collection(gch->must_clear_all_soft_refs(), _max_level); | |
| 150 notify_gc_end(); | |
| 151 } | |
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152 |
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153 void VM_GenCollectForPermanentAllocation::doit() { |
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154 JvmtiGCForAllocationMarker jgcm; |
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155 notify_gc_begin(true); |
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156 SharedHeap* heap = (SharedHeap*)Universe::heap(); |
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157 GCCauseSetter gccs(heap, _gc_cause); |
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158 switch (heap->kind()) { |
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159 case (CollectedHeap::GenCollectedHeap): { |
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160 GenCollectedHeap* gch = (GenCollectedHeap*)heap; |
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161 gch->do_full_collection(gch->must_clear_all_soft_refs(), |
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162 gch->n_gens() - 1); |
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163 break; |
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164 } |
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165 #ifndef SERIALGC |
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166 case (CollectedHeap::G1CollectedHeap): { |
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167 G1CollectedHeap* g1h = (G1CollectedHeap*)heap; |
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168 g1h->do_full_collection(_gc_cause == GCCause::_last_ditch_collection); |
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169 break; |
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170 } |
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171 #endif // SERIALGC |
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172 default: |
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173 ShouldNotReachHere(); |
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174 } |
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175 _res = heap->perm_gen()->allocate(_size, false); |
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176 assert(heap->is_in_reserved_or_null(_res), "result not in heap"); |
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177 if (_res == NULL && GC_locker::is_active_and_needs_gc()) { |
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178 set_gc_locked(); |
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179 } |
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180 notify_gc_end(); |
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181 } |