1 /*

     2  * Copyright (c) 1999, 2016, 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_VM_CI_CIINSTANCE_HPP

    26 #define SHARE_VM_CI_CIINSTANCE_HPP

    27 

    28 #include "ci/ciObject.hpp"

    29 #include "oops/instanceOop.hpp"

    30 #include "oops/oop.hpp"

    31 

    32 // ciInstance

    33 //

    34 // This class represents an instanceOop in the HotSpot virtual

    35 // machine.  This is an oop which corresponds to a non-array

    36 // instance of java.lang.Object.

    37 class ciInstance : public ciObject {

    38   CI_PACKAGE_ACCESS

    39   friend class ciField;

    40 

    41 protected:

    42   ciInstance(instanceHandle h_i) : ciObject(h_i) {

    43     assert(h_i()->is_instance_noinline(), "wrong type");

    44   }

    45 

    46   ciInstance(ciKlass* klass) : ciObject(klass) {}

    47 

    48   instanceOop get_instanceOop() { return (instanceOop)get_oop(); }

    49 

    50   const char* type_string() { return "ciInstance"; }

    51 

    52   void print_impl(outputStream* st);

    53 

    54   ciConstant field_value_impl(BasicType field_btype, int offset);

    55 

    56 public:

    57   // If this object is a java mirror, return the corresponding type.

    58   // Otherwise, return NULL.

    59   // (Remember that a java mirror is an instance of java.lang.Class.)

    60   ciType* java_mirror_type();

    61 

    62   // What kind of ciObject is this?

    63   bool is_instance()     { return true; }

    64   bool is_java_object()  { return true; }

    65 

    66   // Constant value of a field.

    67   ciConstant field_value(ciField* field);

    68 

    69   // Constant value of a field at the specified offset.

    70   ciConstant field_value_by_offset(int field_offset);

    71 

    72   ciKlass* java_lang_Class_klass();

    73 };

    74 

    75 #endif // SHARE_VM_CI_CIINSTANCE_HPP