1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciType.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,115 @@
1.4 +/*
1.5 + * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_CI_CITYPE_HPP
1.29 +#define SHARE_VM_CI_CITYPE_HPP
1.30 +
1.31 +#include "ci/ciMetadata.hpp"
1.32 +
1.33 +// ciType
1.34 +//
1.35 +// This class represents either a class (T_OBJECT), array (T_ARRAY),
1.36 +// or one of the primitive types such as T_INT.
1.37 +class ciType : public ciMetadata {
1.38 + CI_PACKAGE_ACCESS
1.39 + friend class ciKlass;
1.40 + friend class ciReturnAddress;
1.41 +
1.42 +private:
1.43 + BasicType _basic_type;
1.44 +
1.45 + ciType(BasicType t); // for primitive and unloaded types
1.46 + ciType(KlassHandle k); // for subclasses (reference types)
1.47 +
1.48 + const char* type_string() { return "ciType"; }
1.49 +
1.50 + void print_impl(outputStream* st);
1.51 +
1.52 + // Distinguished instances of primitive ciTypes..
1.53 + static ciType* _basic_types[T_CONFLICT+1];
1.54 +
1.55 +public:
1.56 + BasicType basic_type() const { return _basic_type; }
1.57 +
1.58 + // Returns true iff the types are identical, or if both are klasses
1.59 + // and the is_subtype_of relation holds between the klasses.
1.60 + bool is_subtype_of(ciType* type);
1.61 +
1.62 + // Get the instance of java.lang.Class corresponding to this type.
1.63 + // There are mirrors for instance, array, and primitive types (incl. void).
1.64 + virtual ciInstance* java_mirror();
1.65 +
1.66 + // Get the class which "boxes" (or "wraps") values of this type.
1.67 + // Example: short is boxed by java.lang.Short, etc.
1.68 + // Returns self if it is a reference type.
1.69 + // Returns NULL for void, since null is used in such cases.
1.70 + ciKlass* box_klass();
1.71 +
1.72 + // Returns true if this is not a klass or array (i.e., not a reference type).
1.73 + bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; }
1.74 + int size() const { return type2size[basic_type()]; }
1.75 + bool is_void() const { return basic_type() == T_VOID; }
1.76 + bool is_one_word() const { return size() == 1; }
1.77 + bool is_two_word() const { return size() == 2; }
1.78 +
1.79 + // What kind of ciObject is this?
1.80 + bool is_type() const { return true; }
1.81 + bool is_classless() const { return is_primitive_type(); }
1.82 +
1.83 + const char* name();
1.84 + virtual void print_name_on(outputStream* st);
1.85 + void print_name() {
1.86 + print_name_on(tty);
1.87 + }
1.88 +
1.89 + static ciType* make(BasicType t);
1.90 +};
1.91 +
1.92 +
1.93 +// ciReturnAddress
1.94 +//
1.95 +// This class represents the type of a specific return address in the
1.96 +// bytecodes.
1.97 +class ciReturnAddress : public ciType {
1.98 + CI_PACKAGE_ACCESS
1.99 +
1.100 +private:
1.101 + // The bci of this return address.
1.102 + int _bci;
1.103 +
1.104 + ciReturnAddress(int bci);
1.105 +
1.106 + const char* type_string() { return "ciReturnAddress"; }
1.107 +
1.108 + void print_impl(outputStream* st);
1.109 +
1.110 +public:
1.111 + bool is_return_address() const { return true; }
1.112 +
1.113 + int bci() { return _bci; }
1.114 +
1.115 + static ciReturnAddress* make(int bci);
1.116 +};
1.117 +
1.118 +#endif // SHARE_VM_CI_CITYPE_HPP
