/*
* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "ci/ciMethodType.hpp"
#include "ci/ciSignature.hpp"
#include "ci/ciUtilities.hpp"
#include "memory/allocation.inline.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/signature.hpp"
// ciSignature
//
// This class represents the signature of a method.
// ------------------------------------------------------------------
// ciSignature::ciSignature
ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) {
ASSERT_IN_VM;
EXCEPTION_CONTEXT;
_accessing_klass = accessing_klass;
_symbol = symbol;
ciEnv* env = CURRENT_ENV;
Arena* arena = env->arena();
_types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
int size = 0;
int count = 0;
ResourceMark rm(THREAD);
Symbol* sh = symbol->get_symbol();
SignatureStream ss(sh);
for (; ; ss.next()) {
// Process one element of the signature
ciType* type;
if (!ss.is_object()) {
type = ciType::make(ss.type());
} else {
Symbol* name = ss.as_symbol(THREAD);
if (HAS_PENDING_EXCEPTION) {
type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
: (ciType*)ciEnv::unloaded_ciinstance_klass();
env->record_out_of_memory_failure();
CLEAR_PENDING_EXCEPTION;
} else {
ciSymbol* klass_name = env->get_symbol(name);
type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
}
}
_types->append(type);
if (ss.at_return_type()) {
// Done processing the return type; do not add it into the count.
break;
}
size += type->size();
count++;
}
_size = size;
_count = count;
}
// ------------------------------------------------------------------
// ciSignature::ciSignature
ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) :
_symbol(symbol),
_accessing_klass(accessing_klass),
_size( method_type->ptype_slot_count()),
_count(method_type->ptype_count())
{
ASSERT_IN_VM;
EXCEPTION_CONTEXT;
Arena* arena = CURRENT_ENV->arena();
_types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL);
for (int i = 0; i < _count; i++) {
_types->append(method_type->ptype_at(i));
}
_types->append(method_type->rtype());
}
// ------------------------------------------------------------------
// ciSignature::return_type
//
// What is the return type of this signature?
ciType* ciSignature::return_type() const {
return _types->at(_count);
}
// ------------------------------------------------------------------
// ciSignature::type_at
//
// What is the type of the index'th element of this
// signature?
ciType* ciSignature::type_at(int index) const {
assert(index < _count, "out of bounds");
// The first _klasses element holds the return klass.
return _types->at(index);
}
// ------------------------------------------------------------------
// ciSignature::equals
//
// Compare this signature to another one. Signatures with different
// accessing classes but with signature-types resolved to the same
// types are defined to be equal.
bool ciSignature::equals(ciSignature* that) {
// Compare signature
if (!this->as_symbol()->equals(that->as_symbol())) return false;
// Compare all types of the arguments
for (int i = 0; i < _count; i++) {
if (this->type_at(i) != that->type_at(i)) return false;
}
// Compare the return type
if (this->return_type() != that->return_type()) return false;
return true;
}
// ------------------------------------------------------------------
// ciSignature::print_signature
void ciSignature::print_signature() {
_symbol->print_symbol();
}
// ------------------------------------------------------------------
// ciSignature::print
void ciSignature::print() {
tty->print("<ciSignature symbol=");
print_signature();
tty->print(" accessing_klass=");
_accessing_klass->print();
tty->print(" address=0x%x>", (address)this);
}