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src/share/vm/ci/ciType.hpp@c775af091fe9 (annotated)

src/share/vm/ci/ciType.hpp

Mon, 07 Oct 2013 10:41:56 -0700

author

twisti

date

Mon, 07 Oct 2013 10:41:56 -0700

changeset 5907

c775af091fe9

parent 4447

f1de9dbc914e

child 6198

55fb97c4c58d

permissions

-rw-r--r--

8025566: EXCEPTION_ACCESS_VIOLATION in compiled by C1 String.valueOf method
Reviewed-by: kvn

duke@435	1	/*
coleenp@4037	2	* Copyright (c) 2000, 2012, 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_CI_CITYPE_HPP
stefank@2314	26	#define SHARE_VM_CI_CITYPE_HPP
stefank@2314	27
coleenp@4037	28	#include "ci/ciMetadata.hpp"
stefank@2314	29
duke@435	30	// ciType
duke@435	31	//
duke@435	32	// This class represents either a class (T_OBJECT), array (T_ARRAY),
duke@435	33	// or one of the primitive types such as T_INT.
coleenp@4037	34	class ciType : public ciMetadata {
duke@435	35	CI_PACKAGE_ACCESS
duke@435	36	friend class ciKlass;
duke@435	37	friend class ciReturnAddress;
duke@435	38
duke@435	39	private:
duke@435	40	BasicType _basic_type;
duke@435	41
coleenp@4037	42	ciType(BasicType t); // for primitive and unloaded types
duke@435	43	ciType(KlassHandle k); // for subclasses (reference types)
duke@435	44
duke@435	45	const char* type_string() { return "ciType"; }
duke@435	46
duke@435	47	void print_impl(outputStream* st);
duke@435	48
duke@435	49	// Distinguished instances of primitive ciTypes..
duke@435	50	static ciType* _basic_types[T_CONFLICT+1];
duke@435	51
duke@435	52	public:
duke@435	53	BasicType basic_type() const { return _basic_type; }
duke@435	54
duke@435	55	// Returns true iff the types are identical, or if both are klasses
duke@435	56	// and the is_subtype_of relation holds between the klasses.
duke@435	57	bool is_subtype_of(ciType* type);
duke@435	58
duke@435	59	// Get the instance of java.lang.Class corresponding to this type.
duke@435	60	// There are mirrors for instance, array, and primitive types (incl. void).
duke@435	61	virtual ciInstance* java_mirror();
duke@435	62
duke@435	63	// Get the class which "boxes" (or "wraps") values of this type.
duke@435	64	// Example: short is boxed by java.lang.Short, etc.
duke@435	65	// Returns self if it is a reference type.
duke@435	66	// Returns NULL for void, since null is used in such cases.
duke@435	67	ciKlass* box_klass();
duke@435	68
duke@435	69	// Returns true if this is not a klass or array (i.e., not a reference type).
duke@435	70	bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; }
duke@435	71	int size() const { return type2size[basic_type()]; }
duke@435	72	bool is_void() const { return basic_type() == T_VOID; }
duke@435	73	bool is_one_word() const { return size() == 1; }
duke@435	74	bool is_two_word() const { return size() == 2; }
duke@435	75
duke@435	76	// What kind of ciObject is this?
coleenp@4037	77	bool is_type() const { return true; }
duke@435	78	bool is_classless() const { return is_primitive_type(); }
duke@435	79
twisti@4447	80	const char* name();
duke@435	81	virtual void print_name_on(outputStream* st);
duke@435	82	void print_name() {
duke@435	83	print_name_on(tty);
duke@435	84	}
duke@435	85
duke@435	86	static ciType* make(BasicType t);
duke@435	87	};
duke@435	88
duke@435	89
duke@435	90	// ciReturnAddress
duke@435	91	//
duke@435	92	// This class represents the type of a specific return address in the
duke@435	93	// bytecodes.
duke@435	94	class ciReturnAddress : public ciType {
duke@435	95	CI_PACKAGE_ACCESS
duke@435	96
duke@435	97	private:
duke@435	98	// The bci of this return address.
duke@435	99	int _bci;
duke@435	100
duke@435	101	ciReturnAddress(int bci);
duke@435	102
duke@435	103	const char* type_string() { return "ciReturnAddress"; }
duke@435	104
duke@435	105	void print_impl(outputStream* st);
duke@435	106
duke@435	107	public:
coleenp@4037	108	bool is_return_address() const { return true; }
duke@435	109
duke@435	110	int bci() { return _bci; }
duke@435	111
duke@435	112	static ciReturnAddress* make(int bci);
duke@435	113	};
stefank@2314	114
stefank@2314	115	#endif // SHARE_VM_CI_CITYPE_HPP