1 /*
   2  * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "incls/_precompiled.incl"
  26 #include "incls/_ciSignature.cpp.incl"
  27 
  28 // ciSignature
  29 //
  30 // This class represents the signature of a method.
  31 
  32 // ------------------------------------------------------------------
  33 // ciSignature::ciSignature
  34 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol) {
  35   ASSERT_IN_VM;
  36   EXCEPTION_CONTEXT;
  37   _accessing_klass = accessing_klass;
  38   _symbol = symbol;
  39 
  40   ciEnv* env = CURRENT_ENV;
  41   Arena* arena = env->arena();
  42   _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
  43 
  44   int size = 0;
  45   int count = 0;
  46   symbolHandle sh (THREAD, symbol->get_symbolOop());
  47   SignatureStream ss(sh);
  48   for (; ; ss.next()) {
  49     // Process one element of the signature
  50     ciType* type;
  51     if (!ss.is_object()) {
  52       type = ciType::make(ss.type());
  53     } else {
  54       symbolOop name = ss.as_symbol(THREAD);
  55       if (HAS_PENDING_EXCEPTION) {
  56         type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
  57           : (ciType*)ciEnv::unloaded_ciinstance_klass();
  58         env->record_out_of_memory_failure();
  59         CLEAR_PENDING_EXCEPTION;
  60       } else {
  61         ciSymbol* klass_name = env->get_object(name)->as_symbol();
  62         type = env->get_klass_by_name_impl(_accessing_klass, klass_name, false);
  63       }
  64     }
  65     _types->append(type);
  66     if (ss.at_return_type()) {
  67       // Done processing the return type; do not add it into the count.
  68       break;
  69     }
  70     size += type->size();
  71     count++;
  72   }
  73   _size = size;
  74   _count = count;
  75 }
  76 
  77 // ------------------------------------------------------------------
  78 // ciSignature::return_ciType
  79 //
  80 // What is the return type of this signature?
  81 ciType* ciSignature::return_type() const {
  82   return _types->at(_count);
  83 }
  84 
  85 // ------------------------------------------------------------------
  86 // ciSignature::ciType_at
  87 //
  88 // What is the type of the index'th element of this
  89 // signature?
  90 ciType* ciSignature::type_at(int index) const {
  91   assert(index < _count, "out of bounds");
  92   // The first _klasses element holds the return klass.
  93   return _types->at(index);
  94 }
  95 
  96 // ------------------------------------------------------------------
  97 // ciSignature::print_signature
  98 void ciSignature::print_signature() {
  99   _symbol->print_symbol();
 100 }
 101 
 102 // ------------------------------------------------------------------
 103 // ciSignature::print
 104 void ciSignature::print() {
 105   tty->print("<ciSignature symbol=");
 106   print_signature();
 107  tty->print(" accessing_klass=");
 108   _accessing_klass->print();
 109   tty->print(" address=0x%x>", (address)this);
 110 }