Mercurial > hg > graal-jvmci-8
view src/share/vm/gc_implementation/shared/cSpaceCounters.hpp @ 1387:0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
Summary: Ensure a full GC that clears SoftReferences before throwing an out-of-memory
Reviewed-by: ysr, jcoomes
author | jmasa |
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date | Tue, 13 Apr 2010 13:52:10 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2002-2004 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // A CSpaceCounters is a holder class for performance counters // that track a space; class CSpaceCounters: public CHeapObj { friend class VMStructs; private: PerfVariable* _capacity; PerfVariable* _used; // Constant PerfData types don't need to retain a reference. // However, it's a good idea to document them here. // PerfConstant* _size; ContiguousSpace* _space; char* _name_space; public: CSpaceCounters(const char* name, int ordinal, size_t max_size, ContiguousSpace* s, GenerationCounters* gc); ~CSpaceCounters() { if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); } inline void update_capacity() { _capacity->set_value(_space->capacity()); } inline void update_used() { _used->set_value(_space->used()); } inline void update_all() { update_used(); update_capacity(); } const char* name_space() const { return _name_space; } }; class ContiguousSpaceUsedHelper : public PerfLongSampleHelper { private: ContiguousSpace* _space; public: ContiguousSpaceUsedHelper(ContiguousSpace* space) : _space(space) { } inline jlong take_sample() { return _space->used(); } };