jdk8-mips64-public/hotspot: src/share/vm/ci/ciType.cpp@b4776199210f

6943485: JVMTI always on capabilities change code generation too much
Reviewed-by: twisti, dcubed

     1 /*

     2  * Copyright 2000-2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 #include "incls/_precompiled.incl"

    26 #include "incls/_ciType.cpp.incl"

    28 ciType* ciType::_basic_types[T_CONFLICT+1];

    30 // ciType

    31 //

    32 // This class represents either a class (T_OBJECT), array (T_ARRAY),

    33 // or one of the primitive types such as T_INT.

    35 // ------------------------------------------------------------------

    36 // ciType::ciType

    37 //

    38 ciType::ciType(BasicType basic_type) : ciObject() {

    39   assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");

    40   assert(basic_type != T_OBJECT && basic_type != T_ARRAY, "not a reference type");

    41   _basic_type = basic_type;

    42 }

    44 ciType::ciType(KlassHandle k) : ciObject(k) {

    45   _basic_type = Klass::cast(k())->oop_is_array() ? T_ARRAY : T_OBJECT;

    46 }

    48 ciType::ciType(ciKlass* klass) : ciObject(klass) {

    49   _basic_type = klass->is_array_klass_klass() ? T_ARRAY : T_OBJECT;

    50 }

    53 // ------------------------------------------------------------------

    54 // ciType::is_subtype_of

    55 //

    56 bool ciType::is_subtype_of(ciType* type) {

    57   if (this == type)  return true;

    58   if (is_klass() && type->is_klass())

    59     return this->as_klass()->is_subtype_of(type->as_klass());

    60   return false;

    61 }

    63 // ------------------------------------------------------------------

    64 // ciType::print_impl

    65 //

    66 // Implementation of the print method.

    67 void ciType::print_impl(outputStream* st) {

    68   st->print(" type=");

    69   print_name_on(st);

    70 }

    72 // ------------------------------------------------------------------

    73 // ciType::print_name

    74 //

    75 // Print the name of this type

    76 void ciType::print_name_on(outputStream* st) {

    77   st->print(type2name(basic_type()));

    78 }

    82 // ------------------------------------------------------------------

    83 // ciType::java_mirror

    84 //

    85 ciInstance* ciType::java_mirror() {

    86   VM_ENTRY_MARK;

    87   return CURRENT_THREAD_ENV->get_object(Universe::java_mirror(basic_type()))->as_instance();

    88 }

    90 // ------------------------------------------------------------------

    91 // ciType::box_klass

    92 //

    93 ciKlass* ciType::box_klass() {

    94   if (!is_primitive_type())  return this->as_klass();  // reference types are "self boxing"

    96   // Void is "boxed" with a null.

    97   if (basic_type() == T_VOID)  return NULL;

    99   VM_ENTRY_MARK;

   100   return CURRENT_THREAD_ENV->get_object(SystemDictionary::box_klass(basic_type()))->as_instance_klass();

   101 }

   104 // ------------------------------------------------------------------

   105 // ciType::make

   106 //

   107 // Produce the ciType for a given primitive BasicType.

   108 // As a bonus, produce the right reference type for T_OBJECT.

   109 // Does not work on T_ARRAY.

   110 ciType* ciType::make(BasicType t) {

   111   // short, etc.

   112   // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.

   113   assert((uint)t < T_CONFLICT+1, "range check");

   114   if (t == T_OBJECT)  return ciEnv::_Object_klass;  // java/lang/Object

   115   assert(_basic_types[t] != NULL, "domain check");

   116   return _basic_types[t];

   117 }

   119 // ciReturnAddress

   120 //

   121 // This class represents the type of a specific return address in the

   122 // bytecodes.

   124 // ------------------------------------------------------------------

   125 // ciReturnAddress::ciReturnAddress

   126 //

   127 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {

   128   assert(0 <= bci, "bci cannot be negative");

   129   _bci = bci;

   130 }

   132 // ------------------------------------------------------------------

   133 // ciReturnAddress::print_impl

   134 //

   135 // Implementation of the print method.

   136 void ciReturnAddress::print_impl(outputStream* st) {

   137   st->print(" bci=%d", _bci);

   138 }

   140 // ------------------------------------------------------------------

   141 // ciReturnAddress::make

   142 ciReturnAddress* ciReturnAddress::make(int bci) {

   143   GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)

   144 }

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