mirror of
https://github.com/openjdk/jdk.git
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129 lines
4.2 KiB
C++
129 lines
4.2 KiB
C++
/*
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* Copyright (c) 1999, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "ci/ciMethodType.hpp"
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#include "ci/ciSignature.hpp"
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#include "ci/ciStreams.hpp"
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#include "ci/ciUtilities.inline.hpp"
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#include "memory/allocation.inline.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/signature.hpp"
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// ciSignature
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//
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// This class represents the signature of a method.
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// ------------------------------------------------------------------
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// ciSignature::ciSignature
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ciSignature::ciSignature(ciKlass* accessing_klass, const constantPoolHandle& cpool, ciSymbol* symbol)
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: _symbol(symbol), _accessing_klass(accessing_klass), _types(CURRENT_ENV->arena(), 8, 0, NULL) {
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ASSERT_IN_VM;
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EXCEPTION_CONTEXT;
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assert(accessing_klass != NULL, "need origin of access");
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ciEnv* env = CURRENT_ENV;
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int size = 0;
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ResourceMark rm(THREAD);
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for (SignatureStream ss(symbol->get_symbol()); !ss.is_done(); ss.next()) {
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// Process one element of the signature
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ciType* type = NULL;
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if (ss.is_reference()) {
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ciSymbol* klass_name = env->get_symbol(ss.as_symbol());
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type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
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} else {
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type = ciType::make(ss.type());
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}
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if (ss.at_return_type()) {
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// don't include return type in size calculation
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_return_type = type;
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} else {
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_types.append(type);
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size += type->size();
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}
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}
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_size = size;
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}
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// ------------------------------------------------------------------
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// ciSignature::equals
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//
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// Compare this signature to another one. Signatures with different
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// accessing classes but with signature-types resolved to the same
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// types are defined to be equal.
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bool ciSignature::equals(ciSignature* that) {
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// Compare signature
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if (!this->as_symbol()->equals(that->as_symbol())) {
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return false;
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}
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// Compare all types of the arguments
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if (_types.length() != that->_types.length()) {
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return false;
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}
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for (int i = 0; i < _types.length(); i++) {
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if (this->type_at(i) != that->type_at(i)) {
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return false;
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}
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}
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// Compare the return type
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if (this->return_type() != that->return_type()) {
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return false;
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}
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return true;
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}
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// ------------------------------------------------------------------
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// ciSignature::has_unloaded_classes
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//
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// Reports if there are any unloaded classes present in the signature.
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// Each ciSignature when instantiated is resolved against some accessing class
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// and the resolved classes aren't required to be local, but can be revealed
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// through loader constraints.
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bool ciSignature::has_unloaded_classes() {
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for (ciSignatureStream str(this); !str.is_done(); str.next()) {
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if (!str.type()->is_loaded()) {
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return true;
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}
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}
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return false;
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}
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// ------------------------------------------------------------------
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// ciSignature::print_signature
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void ciSignature::print_signature() {
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_symbol->print_symbol();
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}
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// ------------------------------------------------------------------
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// ciSignature::print
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void ciSignature::print() {
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tty->print("<ciSignature symbol=");
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print_signature();
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tty->print(" accessing_klass=");
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_accessing_klass->print();
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tty->print(" address=" INTPTR_FORMAT ">", p2i((address)this));
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}
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