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

src/share/vm/ci/ciSignature.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) 1999, 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/ciMethodType.hpp"
aoqi@0	27	#include "ci/ciSignature.hpp"
aoqi@0	28	#include "ci/ciUtilities.hpp"
aoqi@0	29	#include "memory/allocation.inline.hpp"
aoqi@0	30	#include "oops/oop.inline.hpp"
aoqi@0	31	#include "runtime/signature.hpp"
aoqi@0	32
aoqi@0	33	// ciSignature
aoqi@0	34	//
aoqi@0	35	// This class represents the signature of a method.
aoqi@0	36
aoqi@0	37	// ------------------------------------------------------------------
aoqi@0	38	// ciSignature::ciSignature
aoqi@0	39	ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) {
aoqi@0	40	ASSERT_IN_VM;
aoqi@0	41	EXCEPTION_CONTEXT;
aoqi@0	42	_accessing_klass = accessing_klass;
aoqi@0	43	_symbol = symbol;
aoqi@0	44
aoqi@0	45	ciEnv* env = CURRENT_ENV;
aoqi@0	46	Arena* arena = env->arena();
aoqi@0	47	_types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
aoqi@0	48
aoqi@0	49	int size = 0;
aoqi@0	50	int count = 0;
aoqi@0	51	ResourceMark rm(THREAD);
aoqi@0	52	Symbol* sh = symbol->get_symbol();
aoqi@0	53	SignatureStream ss(sh);
aoqi@0	54	for (; ; ss.next()) {
aoqi@0	55	// Process one element of the signature
aoqi@0	56	ciType* type;
aoqi@0	57	if (!ss.is_object()) {
aoqi@0	58	type = ciType::make(ss.type());
aoqi@0	59	} else {
aoqi@0	60	Symbol* name = ss.as_symbol(THREAD);
aoqi@0	61	if (HAS_PENDING_EXCEPTION) {
aoqi@0	62	type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
aoqi@0	63	: (ciType*)ciEnv::unloaded_ciinstance_klass();
aoqi@0	64	env->record_out_of_memory_failure();
aoqi@0	65	CLEAR_PENDING_EXCEPTION;
aoqi@0	66	} else {
aoqi@0	67	ciSymbol* klass_name = env->get_symbol(name);
aoqi@0	68	type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
aoqi@0	69	}
aoqi@0	70	}
aoqi@0	71	_types->append(type);
aoqi@0	72	if (ss.at_return_type()) {
aoqi@0	73	// Done processing the return type; do not add it into the count.
aoqi@0	74	break;
aoqi@0	75	}
aoqi@0	76	size += type->size();
aoqi@0	77	count++;
aoqi@0	78	}
aoqi@0	79	_size = size;
aoqi@0	80	_count = count;
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	// ------------------------------------------------------------------
aoqi@0	84	// ciSignature::ciSignature
aoqi@0	85	ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) :
aoqi@0	86	_symbol(symbol),
aoqi@0	87	_accessing_klass(accessing_klass),
aoqi@0	88	_size( method_type->ptype_slot_count()),
aoqi@0	89	_count(method_type->ptype_count())
aoqi@0	90	{
aoqi@0	91	ASSERT_IN_VM;
aoqi@0	92	EXCEPTION_CONTEXT;
aoqi@0	93	Arena* arena = CURRENT_ENV->arena();
aoqi@0	94	_types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL);
aoqi@0	95	for (int i = 0; i < _count; i++) {
aoqi@0	96	_types->append(method_type->ptype_at(i));
aoqi@0	97	}
aoqi@0	98	_types->append(method_type->rtype());
aoqi@0	99	}
aoqi@0	100
aoqi@0	101	// ------------------------------------------------------------------
aoqi@0	102	// ciSignature::return_type
aoqi@0	103	//
aoqi@0	104	// What is the return type of this signature?
aoqi@0	105	ciType* ciSignature::return_type() const {
aoqi@0	106	return _types->at(_count);
aoqi@0	107	}
aoqi@0	108
aoqi@0	109	// ------------------------------------------------------------------
aoqi@0	110	// ciSignature::type_at
aoqi@0	111	//
aoqi@0	112	// What is the type of the index'th element of this
aoqi@0	113	// signature?
aoqi@0	114	ciType* ciSignature::type_at(int index) const {
aoqi@0	115	assert(index < _count, "out of bounds");
aoqi@0	116	// The first _klasses element holds the return klass.
aoqi@0	117	return _types->at(index);
aoqi@0	118	}
aoqi@0	119
aoqi@0	120	// ------------------------------------------------------------------
aoqi@0	121	// ciSignature::equals
aoqi@0	122	//
aoqi@0	123	// Compare this signature to another one. Signatures with different
aoqi@0	124	// accessing classes but with signature-types resolved to the same
aoqi@0	125	// types are defined to be equal.
aoqi@0	126	bool ciSignature::equals(ciSignature* that) {
aoqi@0	127	// Compare signature
aoqi@0	128	if (!this->as_symbol()->equals(that->as_symbol())) return false;
aoqi@0	129	// Compare all types of the arguments
aoqi@0	130	for (int i = 0; i < _count; i++) {
aoqi@0	131	if (this->type_at(i) != that->type_at(i)) return false;
aoqi@0	132	}
aoqi@0	133	// Compare the return type
aoqi@0	134	if (this->return_type() != that->return_type()) return false;
aoqi@0	135	return true;
aoqi@0	136	}
aoqi@0	137
aoqi@0	138	// ------------------------------------------------------------------
aoqi@0	139	// ciSignature::print_signature
aoqi@0	140	void ciSignature::print_signature() {
aoqi@0	141	_symbol->print_symbol();
aoqi@0	142	}
aoqi@0	143
aoqi@0	144	// ------------------------------------------------------------------
aoqi@0	145	// ciSignature::print
aoqi@0	146	void ciSignature::print() {
aoqi@0	147	tty->print("<ciSignature symbol=");
aoqi@0	148	print_signature();
aoqi@0	149	tty->print(" accessing_klass=");
aoqi@0	150	_accessing_klass->print();
aoqi@0	151	tty->print(" address=" INTPTR_FORMAT ">", p2i((address)this));
aoqi@0	152	}