jdk8-mips64-public/hotspot: src/share/vm/ci/ciConstant.hpp@5eb9169b1a14

7092712: JSR 292: unloaded invokedynamic call sites can lead to a crash with signature types not on BCP
Reviewed-by: jrose, never

     1 /*

     2  * Copyright (c) 1999, 2011, 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  */

    25 #ifndef SHARE_VM_CI_CICONSTANT_HPP

    26 #define SHARE_VM_CI_CICONSTANT_HPP

    28 #include "ci/ciClassList.hpp"

    29 #include "ci/ciNullObject.hpp"

    31 // ciConstant

    32 //

    33 // This class represents a constant value.

    34 class ciConstant VALUE_OBJ_CLASS_SPEC {

    35   friend class VMStructs;

    36 private:

    37   friend class ciEnv;

    38   friend class ciField;

    40   BasicType _type;

    41   union {

    42     jint      _int;

    43     jlong     _long;

    44     jint      _long_half[2];

    45     jfloat    _float;

    46     jdouble   _double;

    47     ciObject* _object;

    48   } _value;

    50 public:

    52   ciConstant() {

    53     _type = T_ILLEGAL; _value._long = -1;

    54   }

    55   ciConstant(BasicType type, jint value) {

    56     assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT,

    57            "using the wrong ciConstant constructor");

    58     _type = type; _value._int = value;

    59   }

    60   ciConstant(jlong value) {

    61     _type = T_LONG; _value._long = value;

    62   }

    63   ciConstant(jfloat value) {

    64     _type = T_FLOAT; _value._float = value;

    65   }

    66   ciConstant(jdouble value) {

    67     _type = T_DOUBLE; _value._double = value;

    68   }

    69   ciConstant(BasicType type, ciObject* p) {

    70     _type = type; _value._object = p;

    71   }

    73   BasicType basic_type() const { return _type; }

    75   jboolean  as_boolean() {

    76     assert(basic_type() == T_BOOLEAN, "wrong type");

    77     return (jboolean)_value._int;

    78   }

    79   jchar     as_char() {

    80     assert(basic_type() == T_CHAR, "wrong type");

    81     return (jchar)_value._int;

    82   }

    83   jbyte     as_byte() {

    84     assert(basic_type() == T_BYTE, "wrong type");

    85     return (jbyte)_value._int;

    86   }

    87   jshort    as_short() {

    88     assert(basic_type() == T_SHORT, "wrong type");

    89     return (jshort)_value._int;

    90   }

    91   jint      as_int() {

    92     assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR  ||

    93            basic_type() == T_BYTE    || basic_type() == T_SHORT ||

    94            basic_type() == T_INT, "wrong type");

    95     return _value._int;

    96   }

    97   jlong     as_long() {

    98     assert(basic_type() == T_LONG, "wrong type");

    99     return _value._long;

   100   }

   101   jfloat    as_float() {

   102     assert(basic_type() == T_FLOAT, "wrong type");

   103     return _value._float;

   104   }

   105   jdouble   as_double() {

   106     assert(basic_type() == T_DOUBLE, "wrong type");

   107     return _value._double;

   108   }

   109   ciObject* as_object() const {

   110     assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type");

   111     return _value._object;

   112   }

   114   // Debugging output

   115   void print();

   116 };

   118 #endif // SHARE_VM_CI_CICONSTANT_HPP

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