| /* |
| * Copyright (c) 2000, 2013, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_CI_CITYPE_HPP |
| #define SHARE_VM_CI_CITYPE_HPP |
| |
| #include "ci/ciMetadata.hpp" |
| |
| // ciType |
| // |
| // This class represents either a class (T_OBJECT), array (T_ARRAY), |
| // or one of the primitive types such as T_INT. |
| class ciType : public ciMetadata { |
| CI_PACKAGE_ACCESS |
| friend class ciKlass; |
| friend class ciReturnAddress; |
| |
| private: |
| BasicType _basic_type; |
| |
| ciType(BasicType t); // for primitive and unloaded types |
| ciType(KlassHandle k); // for subclasses (reference types) |
| |
| const char* type_string() { return "ciType"; } |
| |
| void print_impl(outputStream* st); |
| |
| // Distinguished instances of primitive ciTypes.. |
| static ciType* _basic_types[T_CONFLICT+1]; |
| |
| public: |
| BasicType basic_type() const { return _basic_type; } |
| |
| // Returns true iff the types are identical, or if both are klasses |
| // and the is_subtype_of relation holds between the klasses. |
| bool is_subtype_of(ciType* type); |
| |
| // Get the instance of java.lang.Class corresponding to this type. |
| // There are mirrors for instance, array, and primitive types (incl. void). |
| virtual ciInstance* java_mirror(); |
| |
| // Get the class which "boxes" (or "wraps") values of this type. |
| // Example: short is boxed by java.lang.Short, etc. |
| // Returns self if it is a reference type. |
| // Returns NULL for void, since null is used in such cases. |
| ciKlass* box_klass(); |
| |
| // Returns true if this is not a klass or array (i.e., not a reference type). |
| bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; } |
| int size() const { return type2size[basic_type()]; } |
| bool is_void() const { return basic_type() == T_VOID; } |
| bool is_one_word() const { return size() == 1; } |
| bool is_two_word() const { return size() == 2; } |
| |
| // What kind of ciObject is this? |
| bool is_type() const { return true; } |
| bool is_classless() const { return is_primitive_type(); } |
| |
| const char* name(); |
| virtual void print_name_on(outputStream* st); |
| void print_name() { |
| print_name_on(tty); |
| } |
| |
| static ciType* make(BasicType t); |
| }; |
| |
| |
| // ciReturnAddress |
| // |
| // This class represents the type of a specific return address in the |
| // bytecodes. |
| class ciReturnAddress : public ciType { |
| CI_PACKAGE_ACCESS |
| |
| private: |
| // The bci of this return address. |
| int _bci; |
| |
| ciReturnAddress(int bci); |
| |
| const char* type_string() { return "ciReturnAddress"; } |
| |
| void print_impl(outputStream* st); |
| |
| public: |
| bool is_return_address() const { return true; } |
| |
| int bci() { return _bci; } |
| |
| static ciReturnAddress* make(int bci); |
| }; |
| |
| #endif // SHARE_VM_CI_CITYPE_HPP |