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src/share/vm/ci/ciType.cpp@710a3c8b516e (annotated)

src/share/vm/ci/ciType.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 6680

78bbf4d43a14

parent 0

f90c822e73f8

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "ci/ciEnv.hpp"
aoqi@0	27	#include "ci/ciType.hpp"
aoqi@0	28	#include "ci/ciUtilities.hpp"
aoqi@0	29	#include "classfile/systemDictionary.hpp"
aoqi@0	30	#include "oops/oop.inline.hpp"
aoqi@0	31
aoqi@0	32	ciType* ciType::_basic_types[T_CONFLICT+1];
aoqi@0	33
aoqi@0	34	// ciType
aoqi@0	35	//
aoqi@0	36	// This class represents either a class (T_OBJECT), array (T_ARRAY),
aoqi@0	37	// or one of the primitive types such as T_INT.
aoqi@0	38
aoqi@0	39	// ------------------------------------------------------------------
aoqi@0	40	// ciType::ciType
aoqi@0	41	//
aoqi@0	42	ciType::ciType(BasicType basic_type) : ciMetadata() {
aoqi@0	43	assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
aoqi@0	44	_basic_type = basic_type;
aoqi@0	45	}
aoqi@0	46
aoqi@0	47	ciType::ciType(KlassHandle k) : ciMetadata(k()) {
aoqi@0	48	_basic_type = k()->oop_is_array() ? T_ARRAY : T_OBJECT;
aoqi@0	49	}
aoqi@0	50
aoqi@0	51
aoqi@0	52	// ------------------------------------------------------------------
aoqi@0	53	// ciType::is_subtype_of
aoqi@0	54	//
aoqi@0	55	bool ciType::is_subtype_of(ciType* type) {
aoqi@0	56	if (this == type) return true;
aoqi@0	57	if (is_klass() && type->is_klass())
aoqi@0	58	return this->as_klass()->is_subtype_of(type->as_klass());
aoqi@0	59	return false;
aoqi@0	60	}
aoqi@0	61
aoqi@0	62	// ------------------------------------------------------------------
aoqi@0	63	// ciType::name
aoqi@0	64	//
aoqi@0	65	// Return the name of this type
aoqi@0	66	const char* ciType::name() {
aoqi@0	67	if (is_primitive_type()) {
aoqi@0	68	return type2name(basic_type());
aoqi@0	69	} else {
aoqi@0	70	assert(is_klass(), "must be");
aoqi@0	71	return as_klass()->name()->as_utf8();
aoqi@0	72	}
aoqi@0	73	}
aoqi@0	74
aoqi@0	75	// ------------------------------------------------------------------
aoqi@0	76	// ciType::print_impl
aoqi@0	77	//
aoqi@0	78	// Implementation of the print method.
aoqi@0	79	void ciType::print_impl(outputStream* st) {
aoqi@0	80	st->print(" type=");
aoqi@0	81	print_name_on(st);
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	// ------------------------------------------------------------------
aoqi@0	85	// ciType::print_name
aoqi@0	86	//
aoqi@0	87	// Print the name of this type
aoqi@0	88	void ciType::print_name_on(outputStream* st) {
aoqi@0	89	ResourceMark rm;
aoqi@0	90	st->print("%s", name());
aoqi@0	91	}
aoqi@0	92
aoqi@0	93
aoqi@0	94
aoqi@0	95	// ------------------------------------------------------------------
aoqi@0	96	// ciType::java_mirror
aoqi@0	97	//
aoqi@0	98	ciInstance* ciType::java_mirror() {
aoqi@0	99	VM_ENTRY_MARK;
aoqi@0	100	return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));
aoqi@0	101	}
aoqi@0	102
aoqi@0	103	// ------------------------------------------------------------------
aoqi@0	104	// ciType::box_klass
aoqi@0	105	//
aoqi@0	106	ciKlass* ciType::box_klass() {
aoqi@0	107	if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing"
aoqi@0	108
aoqi@0	109	// Void is "boxed" with a null.
aoqi@0	110	if (basic_type() == T_VOID) return NULL;
aoqi@0	111
aoqi@0	112	VM_ENTRY_MARK;
aoqi@0	113	return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type()));
aoqi@0	114	}
aoqi@0	115
aoqi@0	116
aoqi@0	117	// ------------------------------------------------------------------
aoqi@0	118	// ciType::make
aoqi@0	119	//
aoqi@0	120	// Produce the ciType for a given primitive BasicType.
aoqi@0	121	// As a bonus, produce the right reference type for T_OBJECT.
aoqi@0	122	// Does not work on T_ARRAY.
aoqi@0	123	ciType* ciType::make(BasicType t) {
aoqi@0	124	// short, etc.
aoqi@0	125	// Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
aoqi@0	126	assert((uint)t < T_CONFLICT+1, "range check");
aoqi@0	127	if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object
aoqi@0	128	assert(_basic_types[t] != NULL, "domain check");
aoqi@0	129	return _basic_types[t];
aoqi@0	130	}
aoqi@0	131
aoqi@0	132	// ciReturnAddress
aoqi@0	133	//
aoqi@0	134	// This class represents the type of a specific return address in the
aoqi@0	135	// bytecodes.
aoqi@0	136
aoqi@0	137	// ------------------------------------------------------------------
aoqi@0	138	// ciReturnAddress::ciReturnAddress
aoqi@0	139	//
aoqi@0	140	ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
aoqi@0	141	assert(0 <= bci, "bci cannot be negative");
aoqi@0	142	_bci = bci;
aoqi@0	143	}
aoqi@0	144
aoqi@0	145	// ------------------------------------------------------------------
aoqi@0	146	// ciReturnAddress::print_impl
aoqi@0	147	//
aoqi@0	148	// Implementation of the print method.
aoqi@0	149	void ciReturnAddress::print_impl(outputStream* st) {
aoqi@0	150	st->print(" bci=%d", _bci);
aoqi@0	151	}
aoqi@0	152
aoqi@0	153	// ------------------------------------------------------------------
aoqi@0	154	// ciReturnAddress::make
aoqi@0	155	ciReturnAddress* ciReturnAddress::make(int bci) {
aoqi@0	156	GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
aoqi@0	157	}