author | jiangli |
Tue, 09 Apr 2013 17:17:41 -0400 | |
changeset 17000 | 11bf92e571a2 |
parent 15210 | eb42543a7050 |
child 22234 | da823d78ad65 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_CI_CITYPE_HPP |
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#define SHARE_VM_CI_CITYPE_HPP |
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#include "ci/ciMetadata.hpp" |
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// ciType |
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// |
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// This class represents either a class (T_OBJECT), array (T_ARRAY), |
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// or one of the primitive types such as T_INT. |
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class ciType : public ciMetadata { |
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CI_PACKAGE_ACCESS |
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friend class ciKlass; |
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friend class ciReturnAddress; |
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private: |
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BasicType _basic_type; |
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ciType(BasicType t); // for primitive and unloaded types |
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ciType(KlassHandle k); // for subclasses (reference types) |
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const char* type_string() { return "ciType"; } |
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void print_impl(outputStream* st); |
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// Distinguished instances of primitive ciTypes.. |
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static ciType* _basic_types[T_CONFLICT+1]; |
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public: |
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BasicType basic_type() const { return _basic_type; } |
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// Returns true iff the types are identical, or if both are klasses |
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// and the is_subtype_of relation holds between the klasses. |
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bool is_subtype_of(ciType* type); |
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// Get the instance of java.lang.Class corresponding to this type. |
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// There are mirrors for instance, array, and primitive types (incl. void). |
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virtual ciInstance* java_mirror(); |
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// Get the class which "boxes" (or "wraps") values of this type. |
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// Example: short is boxed by java.lang.Short, etc. |
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// Returns self if it is a reference type. |
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// Returns NULL for void, since null is used in such cases. |
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ciKlass* box_klass(); |
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// Returns true if this is not a klass or array (i.e., not a reference type). |
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bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; } |
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int size() const { return type2size[basic_type()]; } |
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bool is_void() const { return basic_type() == T_VOID; } |
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bool is_one_word() const { return size() == 1; } |
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bool is_two_word() const { return size() == 2; } |
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// What kind of ciObject is this? |
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bool is_type() const { return true; } |
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bool is_classless() const { return is_primitive_type(); } |
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const char* name(); |
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virtual void print_name_on(outputStream* st); |
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void print_name() { |
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print_name_on(tty); |
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} |
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static ciType* make(BasicType t); |
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}; |
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// ciReturnAddress |
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// |
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// This class represents the type of a specific return address in the |
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// bytecodes. |
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class ciReturnAddress : public ciType { |
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CI_PACKAGE_ACCESS |
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private: |
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// The bci of this return address. |
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int _bci; |
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ciReturnAddress(int bci); |
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const char* type_string() { return "ciReturnAddress"; } |
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void print_impl(outputStream* st); |
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public: |
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bool is_return_address() const { return true; } |
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int bci() { return _bci; } |
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static ciReturnAddress* make(int bci); |
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}; |
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#endif // SHARE_VM_CI_CITYPE_HPP |