Mercurial > hg > truffle
diff src/share/vm/memory/permGen.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c0492d52d55b |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/permGen.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,73 @@ +/* + * Copyright 2000-2005 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. + * + */ + +// All heaps contains a "permanent generation," containing permanent +// (reflective) objects. This is like a regular generation in some ways, +// but unlike one in others, and so is split apart. + +class Generation; +class GenRemSet; +class CSpaceCounters; + +// PermGen models the part of the heap + +class PermGen : public CHeapObj { + friend class VMStructs; + protected: + size_t _capacity_expansion_limit; // maximum expansion allowed without a + // full gc occuring + + public: + enum Name { + MarkSweepCompact, MarkSweep, ConcurrentMarkSweep + }; + + // Permanent allocation (initialized) + virtual HeapWord* mem_allocate(size_t size) = 0; + + // Mark sweep support + virtual void compute_new_size() = 0; + + // Ideally, we would use MI (IMHO) but we'll do delegation instead. + virtual Generation* as_gen() const = 0; + + virtual void oop_iterate(OopClosure* cl) { + Generation* g = as_gen(); + assert(g != NULL, "as_gen() NULL"); + g->oop_iterate(cl); + } + + virtual void object_iterate(ObjectClosure* cl) { + Generation* g = as_gen(); + assert(g != NULL, "as_gen() NULL"); + g->object_iterate(cl); + } + + // Performance Counter support + virtual void update_counters() { + Generation* g = as_gen(); + assert(g != NULL, "as_gen() NULL"); + g->update_counters(); + } +};