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

src/share/vm/memory/generationSpec.hpp

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

author

acorn

date

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

changeset 843

52e32c8b317e

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

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	/*
duke@435	2	* Copyright 2001-2004 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	// The specification of a generation. This class also encapsulates
duke@435	26	// some generation-specific behavior. This is done here rather than as a
duke@435	27	// virtual function of Generation because these methods are needed in
duke@435	28	// initialization of the Generations.
duke@435	29	class GenerationSpec : public CHeapObj {
duke@435	30	friend class VMStructs;
duke@435	31	private:
duke@435	32	Generation::Name _name;
duke@435	33	size_t _init_size;
duke@435	34	size_t _max_size;
duke@435	35
duke@435	36	public:
duke@435	37	GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) {
duke@435	38	_name = name;
duke@435	39	_init_size = init_size;
duke@435	40	_max_size = max_size;
duke@435	41	}
duke@435	42
duke@435	43	Generation* init(ReservedSpace rs, int level, GenRemSet* remset);
duke@435	44
duke@435	45	// Accessors
duke@435	46	Generation::Name name() const { return _name; }
duke@435	47	size_t init_size() const { return _init_size; }
duke@435	48	void set_init_size(size_t size) { _init_size = size; }
duke@435	49	size_t max_size() const { return _max_size; }
duke@435	50	void set_max_size(size_t size) { _max_size = size; }
duke@435	51
duke@435	52	// Alignment
duke@435	53	void align(size_t alignment) {
duke@435	54	set_init_size(align_size_up(init_size(), alignment));
duke@435	55	set_max_size(align_size_up(max_size(), alignment));
duke@435	56	}
duke@435	57
duke@435	58	// Return the number of regions contained in the generation which
duke@435	59	// might need to be independently covered by a remembered set.
duke@435	60	virtual int n_covered_regions() const { return 1; }
duke@435	61	};
duke@435	62
duke@435	63	typedef GenerationSpec* GenerationSpecPtr;
duke@435	64
duke@435	65	// The specification of a permanent generation. This class is very
duke@435	66	// similar to GenerationSpec in use. Due to PermGen's not being a
duke@435	67	// true Generation, we cannot combine the spec classes either.
duke@435	68	class PermanentGenerationSpec : public CHeapObj {
duke@435	69	friend class VMStructs;
duke@435	70	private:
duke@435	71	PermGen::Name _name;
duke@435	72	size_t _init_size;
duke@435	73	size_t _max_size;
duke@435	74	size_t _read_only_size;
duke@435	75	size_t _read_write_size;
duke@435	76	size_t _misc_data_size;
duke@435	77	size_t _misc_code_size;
duke@435	78	bool _enable_shared_spaces;
duke@435	79
duke@435	80	enum {
duke@435	81	_n_spaces = 2
duke@435	82	};
duke@435	83
duke@435	84	public:
duke@435	85	PermanentGenerationSpec(PermGen::Name name, size_t init_size,
duke@435	86	size_t max_size, size_t read_only_size,
duke@435	87	size_t read_write_size, size_t misc_data_size,
duke@435	88	size_t misc_code_size);
duke@435	89
duke@435	90	PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset);
duke@435	91
duke@435	92	void disable_sharing() {
duke@435	93	_enable_shared_spaces = false;
duke@435	94	_read_only_size = 0;
duke@435	95	_read_write_size = 0;
duke@435	96	_misc_data_size = 0;
duke@435	97	_misc_code_size = 0;
duke@435	98	}
duke@435	99
duke@435	100	// Accessors
duke@435	101	PermGen::Name name() const { return _name; }
duke@435	102	size_t init_size() const { return _init_size; }
duke@435	103	void set_init_size(size_t size) { _init_size = size; }
duke@435	104
duke@435	105	// Max size for user DOES NOT include shared spaces.
duke@435	106	// Max size for space allocation DOES include shared spaces.
duke@435	107	size_t max_size() const {
duke@435	108	return _max_size + _read_only_size + _read_write_size;
duke@435	109	}
duke@435	110
duke@435	111	// Need one covered region for the main space, and one for the shared
duke@435	112	// spaces (together).
duke@435	113	int n_covered_regions() const { return 2; }
duke@435	114
duke@435	115	void align(size_t alignment);
duke@435	116
duke@435	117	size_t read_only_size() const { return _read_only_size; }
duke@435	118	size_t read_write_size() const { return _read_write_size; }
duke@435	119	size_t misc_data_size() const { return _misc_data_size; }
duke@435	120	size_t misc_code_size() const { return _misc_code_size; }
duke@435	121	bool enable_shared_spaces() const { return _enable_shared_spaces; }
duke@435	122	};