1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciSignature.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,152 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "ci/ciMethodType.hpp"
1.30 +#include "ci/ciSignature.hpp"
1.31 +#include "ci/ciUtilities.hpp"
1.32 +#include "memory/allocation.inline.hpp"
1.33 +#include "oops/oop.inline.hpp"
1.34 +#include "runtime/signature.hpp"
1.35 +
1.36 +// ciSignature
1.37 +//
1.38 +// This class represents the signature of a method.
1.39 +
1.40 +// ------------------------------------------------------------------
1.41 +// ciSignature::ciSignature
1.42 +ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) {
1.43 + ASSERT_IN_VM;
1.44 + EXCEPTION_CONTEXT;
1.45 + _accessing_klass = accessing_klass;
1.46 + _symbol = symbol;
1.47 +
1.48 + ciEnv* env = CURRENT_ENV;
1.49 + Arena* arena = env->arena();
1.50 + _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
1.51 +
1.52 + int size = 0;
1.53 + int count = 0;
1.54 + ResourceMark rm(THREAD);
1.55 + Symbol* sh = symbol->get_symbol();
1.56 + SignatureStream ss(sh);
1.57 + for (; ; ss.next()) {
1.58 + // Process one element of the signature
1.59 + ciType* type;
1.60 + if (!ss.is_object()) {
1.61 + type = ciType::make(ss.type());
1.62 + } else {
1.63 + Symbol* name = ss.as_symbol(THREAD);
1.64 + if (HAS_PENDING_EXCEPTION) {
1.65 + type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
1.66 + : (ciType*)ciEnv::unloaded_ciinstance_klass();
1.67 + env->record_out_of_memory_failure();
1.68 + CLEAR_PENDING_EXCEPTION;
1.69 + } else {
1.70 + ciSymbol* klass_name = env->get_symbol(name);
1.71 + type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
1.72 + }
1.73 + }
1.74 + _types->append(type);
1.75 + if (ss.at_return_type()) {
1.76 + // Done processing the return type; do not add it into the count.
1.77 + break;
1.78 + }
1.79 + size += type->size();
1.80 + count++;
1.81 + }
1.82 + _size = size;
1.83 + _count = count;
1.84 +}
1.85 +
1.86 +// ------------------------------------------------------------------
1.87 +// ciSignature::ciSignature
1.88 +ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) :
1.89 + _symbol(symbol),
1.90 + _accessing_klass(accessing_klass),
1.91 + _size( method_type->ptype_slot_count()),
1.92 + _count(method_type->ptype_count())
1.93 +{
1.94 + ASSERT_IN_VM;
1.95 + EXCEPTION_CONTEXT;
1.96 + Arena* arena = CURRENT_ENV->arena();
1.97 + _types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL);
1.98 + for (int i = 0; i < _count; i++) {
1.99 + _types->append(method_type->ptype_at(i));
1.100 + }
1.101 + _types->append(method_type->rtype());
1.102 +}
1.103 +
1.104 +// ------------------------------------------------------------------
1.105 +// ciSignature::return_type
1.106 +//
1.107 +// What is the return type of this signature?
1.108 +ciType* ciSignature::return_type() const {
1.109 + return _types->at(_count);
1.110 +}
1.111 +
1.112 +// ------------------------------------------------------------------
1.113 +// ciSignature::type_at
1.114 +//
1.115 +// What is the type of the index'th element of this
1.116 +// signature?
1.117 +ciType* ciSignature::type_at(int index) const {
1.118 + assert(index < _count, "out of bounds");
1.119 + // The first _klasses element holds the return klass.
1.120 + return _types->at(index);
1.121 +}
1.122 +
1.123 +// ------------------------------------------------------------------
1.124 +// ciSignature::equals
1.125 +//
1.126 +// Compare this signature to another one. Signatures with different
1.127 +// accessing classes but with signature-types resolved to the same
1.128 +// types are defined to be equal.
1.129 +bool ciSignature::equals(ciSignature* that) {
1.130 + // Compare signature
1.131 + if (!this->as_symbol()->equals(that->as_symbol())) return false;
1.132 + // Compare all types of the arguments
1.133 + for (int i = 0; i < _count; i++) {
1.134 + if (this->type_at(i) != that->type_at(i)) return false;
1.135 + }
1.136 + // Compare the return type
1.137 + if (this->return_type() != that->return_type()) return false;
1.138 + return true;
1.139 +}
1.140 +
1.141 +// ------------------------------------------------------------------
1.142 +// ciSignature::print_signature
1.143 +void ciSignature::print_signature() {
1.144 + _symbol->print_symbol();
1.145 +}
1.146 +
1.147 +// ------------------------------------------------------------------
1.148 +// ciSignature::print
1.149 +void ciSignature::print() {
1.150 + tty->print("<ciSignature symbol=");
1.151 + print_signature();
1.152 + tty->print(" accessing_klass=");
1.153 + _accessing_klass->print();
1.154 + tty->print(" address=" INTPTR_FORMAT ">", p2i((address)this));
1.155 +}
