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src/share/vm/memory/permGen.hpp@52e32c8b317e (annotated)

src/share/vm/memory/permGen.hpp

Wed, 22 Oct 2008 14:48:08 -0400

author

acorn

date

Wed, 22 Oct 2008 14:48:08 -0400

changeset 843

52e32c8b317e

parent 631

d1605aabd0a1

child 1040

98cb887364d3

permissions

-rw-r--r--

6761092: jvm crashes when CDS is enabled.
Summary: CDS hardcoded max c++ virtual method table increased
Reviewed-by: coleenp, xlu, jmasa

duke@435	1	/*
xdono@631	2	* Copyright 2000-2008 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// All heaps contains a "permanent generation," containing permanent
duke@435	26	// (reflective) objects. This is like a regular generation in some ways,
duke@435	27	// but unlike one in others, and so is split apart.
duke@435	28
duke@435	29	class Generation;
duke@435	30	class GenRemSet;
duke@435	31	class CSpaceCounters;
duke@435	32
duke@435	33	// PermGen models the part of the heap
duke@435	34
duke@435	35	class PermGen : public CHeapObj {
duke@435	36	friend class VMStructs;
duke@435	37	protected:
duke@435	38	size_t _capacity_expansion_limit; // maximum expansion allowed without a
duke@435	39	// full gc occuring
duke@435	40
apetrusenko@574	41	HeapWord* mem_allocate_in_gen(size_t size, Generation* gen);
apetrusenko@574	42
duke@435	43	public:
duke@435	44	enum Name {
duke@435	45	MarkSweepCompact, MarkSweep, ConcurrentMarkSweep
duke@435	46	};
duke@435	47
duke@435	48	// Permanent allocation (initialized)
duke@435	49	virtual HeapWord* mem_allocate(size_t size) = 0;
duke@435	50
duke@435	51	// Mark sweep support
duke@435	52	virtual void compute_new_size() = 0;
duke@435	53
duke@435	54	// Ideally, we would use MI (IMHO) but we'll do delegation instead.
duke@435	55	virtual Generation* as_gen() const = 0;
duke@435	56
duke@435	57	virtual void oop_iterate(OopClosure* cl) {
duke@435	58	Generation* g = as_gen();
duke@435	59	assert(g != NULL, "as_gen() NULL");
duke@435	60	g->oop_iterate(cl);
duke@435	61	}
duke@435	62
duke@435	63	virtual void object_iterate(ObjectClosure* cl) {
duke@435	64	Generation* g = as_gen();
duke@435	65	assert(g != NULL, "as_gen() NULL");
duke@435	66	g->object_iterate(cl);
duke@435	67	}
duke@435	68
duke@435	69	// Performance Counter support
duke@435	70	virtual void update_counters() {
duke@435	71	Generation* g = as_gen();
duke@435	72	assert(g != NULL, "as_gen() NULL");
duke@435	73	g->update_counters();
duke@435	74	}
duke@435	75	};