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src/share/vm/runtime/stubCodeGenerator.hpp@d2a62e0f25eb (annotated)

src/share/vm/runtime/stubCodeGenerator.hpp

Thu, 28 Jun 2012 17:03:16 -0400

author

zgu

date

Thu, 28 Jun 2012 17:03:16 -0400

changeset 3900

d2a62e0f25eb

parent 2954

f8c9417e3571

child 4153

b9a9ed0f8eeb

permissions

-rw-r--r--

6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP
stefank@2314	26	#define SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP
stefank@2314	27
stefank@2314	28	#include "asm/assembler.hpp"
stefank@2314	29	#include "memory/allocation.hpp"
stefank@2314	30
duke@435	31	// All the basic framework for stubcode generation/debugging/printing.
duke@435	32
duke@435	33
duke@435	34	// A StubCodeDesc describes a piece of generated code (usually stubs).
duke@435	35	// This information is mainly useful for debugging and printing.
duke@435	36	// Currently, code descriptors are simply chained in a linked list,
duke@435	37	// this may have to change if searching becomes too slow.
duke@435	38
zgu@3900	39	class StubCodeDesc: public CHeapObj<mtCode> {
duke@435	40	protected:
duke@435	41	static StubCodeDesc* _list; // the list of all descriptors
duke@435	42	static int _count; // length of list
duke@435	43
duke@435	44	StubCodeDesc* _next; // the next element in the linked list
duke@435	45	const char* _group; // the group to which the stub code belongs
duke@435	46	const char* _name; // the name assigned to the stub code
duke@435	47	int _index; // serial number assigned to the stub
duke@435	48	address _begin; // points to the first byte of the stub code (included)
duke@435	49	address _end; // points to the first byte after the stub code (excluded)
duke@435	50
duke@435	51	void set_end(address end) {
duke@435	52	assert(_begin <= end, "begin & end not properly ordered");
duke@435	53	_end = end;
duke@435	54	}
duke@435	55
duke@435	56	void set_begin(address begin) {
duke@435	57	assert(begin >= _begin, "begin may not decrease");
duke@435	58	assert(_end == NULL || begin <= _end, "begin & end not properly ordered");
duke@435	59	_begin = begin;
duke@435	60	}
duke@435	61
duke@435	62	friend class StubCodeMark;
duke@435	63	friend class StubCodeGenerator;
duke@435	64
duke@435	65	public:
duke@435	66	static StubCodeDesc* desc_for(address pc); // returns the code descriptor for the code containing pc or NULL
duke@435	67	static StubCodeDesc* desc_for_index(int); // returns the code descriptor for the index or NULL
duke@435	68	static const char* name_for(address pc); // returns the name of the code containing pc or NULL
duke@435	69
duke@435	70	StubCodeDesc(const char* group, const char* name, address begin) {
duke@435	71	assert(name != NULL, "no name specified");
duke@435	72	_next = _list;
duke@435	73	_group = group;
duke@435	74	_name = name;
duke@435	75	_index = ++_count; // (never zero)
duke@435	76	_begin = begin;
duke@435	77	_end = NULL;
duke@435	78	_list = this;
duke@435	79	};
duke@435	80
duke@435	81	const char* group() const { return _group; }
duke@435	82	const char* name() const { return _name; }
duke@435	83	int index() const { return _index; }
duke@435	84	address begin() const { return _begin; }
duke@435	85	address end() const { return _end; }
duke@435	86	int size_in_bytes() const { return _end - _begin; }
duke@435	87	bool contains(address pc) const { return _begin <= pc && pc < _end; }
bobv@2036	88	void print_on(outputStream* st) const;
bobv@2036	89	void print() const { print_on(tty); }
duke@435	90	};
duke@435	91
duke@435	92	// The base class for all stub-generating code generators.
duke@435	93	// Provides utility functions.
duke@435	94
duke@435	95	class StubCodeGenerator: public StackObj {
duke@435	96	protected:
duke@435	97	MacroAssembler* _masm;
duke@435	98
duke@435	99	StubCodeDesc* _first_stub;
duke@435	100	StubCodeDesc* _last_stub;
never@2954	101	bool _print_code;
duke@435	102
duke@435	103	public:
never@2954	104	StubCodeGenerator(CodeBuffer* code, bool print_code = false);
duke@435	105	~StubCodeGenerator();
duke@435	106
duke@435	107	MacroAssembler* assembler() const { return _masm; }
duke@435	108
duke@435	109	virtual void stub_prolog(StubCodeDesc* cdesc); // called by StubCodeMark constructor
duke@435	110	virtual void stub_epilog(StubCodeDesc* cdesc); // called by StubCodeMark destructor
duke@435	111	};
duke@435	112
duke@435	113
duke@435	114	// Stack-allocated helper class used to assciate a stub code with a name.
duke@435	115	// All stub code generating functions that use a StubCodeMark will be registered
duke@435	116	// in the global StubCodeDesc list and the generated stub code can be identified
duke@435	117	// later via an address pointing into it.
duke@435	118
duke@435	119	class StubCodeMark: public StackObj {
duke@435	120	protected:
duke@435	121	StubCodeGenerator* _cgen;
duke@435	122	StubCodeDesc* _cdesc;
duke@435	123
duke@435	124	public:
duke@435	125	StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name);
duke@435	126	~StubCodeMark();
duke@435	127
duke@435	128	};
stefank@2314	129
stefank@2314	130	#endif // SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP