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src/share/vm/runtime/stackValue.hpp@9f4457a14b58 (annotated)

src/share/vm/runtime/stackValue.hpp

Wed, 09 Apr 2008 15:10:22 -0700

author

rasbold

date

Wed, 09 Apr 2008 15:10:22 -0700

changeset 544

9f4457a14b58

parent 435

a61af66fc99e

child 1253

b109e761e927

permissions

-rw-r--r--

Merge

duke@435	1	/*
duke@435	2	* Copyright 1997-2005 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	class StackValue : public ResourceObj {
duke@435	26	private:
duke@435	27	BasicType _type;
duke@435	28	intptr_t _i; // Blank java stack slot value
duke@435	29	Handle _o; // Java stack slot value interpreted as a Handle
duke@435	30	public:
duke@435	31
duke@435	32	StackValue(intptr_t value) {
duke@435	33	_type = T_INT;
duke@435	34	_i = value;
duke@435	35	}
duke@435	36
duke@435	37	StackValue(Handle value) {
duke@435	38	_type = T_OBJECT;
duke@435	39	_o = value;
duke@435	40	}
duke@435	41
duke@435	42	StackValue() {
duke@435	43	_type = T_CONFLICT;
duke@435	44	_i = 0;
duke@435	45	}
duke@435	46
duke@435	47	// Only used during deopt- preserve object type.
duke@435	48	StackValue(intptr_t o, BasicType t) {
duke@435	49	assert(t == T_OBJECT, "should not be used");
duke@435	50	_type = t;
duke@435	51	_i = o;
duke@435	52	}
duke@435	53
duke@435	54	Handle get_obj() const {
duke@435	55	assert(type() == T_OBJECT, "type check");
duke@435	56	return _o;
duke@435	57	}
duke@435	58
duke@435	59	void set_obj(Handle value) {
duke@435	60	assert(type() == T_OBJECT, "type check");
duke@435	61	_o = value;
duke@435	62	}
duke@435	63
duke@435	64	intptr_t get_int() const {
duke@435	65	assert(type() == T_INT, "type check");
duke@435	66	return _i;
duke@435	67	}
duke@435	68
duke@435	69	// For special case in deopt.
duke@435	70	intptr_t get_int(BasicType t) const {
duke@435	71	assert(t == T_OBJECT && type() == T_OBJECT, "type check");
duke@435	72	return _i;
duke@435	73	}
duke@435	74
duke@435	75	void set_int(intptr_t value) {
duke@435	76	assert(type() == T_INT, "type check");
duke@435	77	_i = value;
duke@435	78	}
duke@435	79
duke@435	80	BasicType type() const { return _type; }
duke@435	81
duke@435	82	bool equal(StackValue *value) {
duke@435	83	if (_type != value->_type) return false;
duke@435	84	if (_type == T_OBJECT)
duke@435	85	return (_o == value->_o);
duke@435	86	else {
duke@435	87	assert(_type == T_INT, "sanity check");
duke@435	88	// [phh] compare only low addressed portions of intptr_t slots
duke@435	89	return (*(int *)&_i == *(int *)&value->_i);
duke@435	90	}
duke@435	91	}
duke@435	92
duke@435	93	static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv);
duke@435	94	static BasicLock* resolve_monitor_lock(const frame* fr, Location location);
duke@435	95
duke@435	96	#ifndef PRODUCT
duke@435	97	public:
duke@435	98	// Printing
duke@435	99	void print_on(outputStream* st) const;
duke@435	100	#endif
duke@435	101	};