1 /*
 2  * Copyright (c) 1999, 2020, 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 #ifndef SHARE_CI_CISIGNATURE_HPP
26 #define SHARE_CI_CISIGNATURE_HPP
27 
28 #include "ci/ciClassList.hpp"
29 #include "ci/ciSymbol.hpp"
30 #include "ci/ciType.hpp"
31 #include "interpreter/bytecodes.hpp"
32 #include "utilities/globalDefinitions.hpp"
33 #include "utilities/growableArray.hpp"
34 
35 // ciSignature
36 //
37 // This class represents the signature of a method.
38 class ciSignature : public ArenaObj {
39 private:
40   ciSymbol* _symbol;
41   ciKlass*  _accessing_klass;
42 
43   GrowableArray<ciType*> _types; // parameter types
44   ciType* _return_type;
45   int _size;   // number of stack slots required for arguments
46 
47   friend class ciMethod;
48   friend class ciBytecodeStream;
49   friend class ciObjectFactory;
50 
51   ciSignature(ciKlass* accessing_klass, const constantPoolHandle& cpool, ciSymbol* signature);
52 
53   Symbol* get_symbol() const                     { return _symbol->get_symbol(); }
54 
55 public:
56   ciSymbol* as_symbol() const                    { return _symbol; }
57   ciKlass*  accessing_klass() const              { return _accessing_klass; }
58 
59   ciType*   return_type() const                  { return _return_type; }
60   ciType*   type_at(int index) const             { return _types.at(index)->unwrap(); }
61 
62   int       size() const                         { return _size; }
63   int       count() const                        { return _types.length(); }
64 
65   int       arg_size_for_bc(Bytecodes::Code bc)  { return size() + (Bytecodes::has_receiver(bc) ? 1 : 0); }
66 
67   bool has_unloaded_classes();
68 
69   bool equals(ciSignature* that);
70 
71   void print_signature();
72   void print();
73 };
74 
75 #endif // SHARE_CI_CISIGNATURE_HPP