jdk8-mips64-public/hotspot: src/share/vm/ci/ciType.cpp@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) 2000, 2010, 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 #include "precompiled.hpp"

    26 #include "ci/ciType.hpp"

    27 #include "ci/ciUtilities.hpp"

    28 #include "classfile/systemDictionary.hpp"

    29 #include "oops/oop.inline.hpp"

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

    33 // ciType

    34 //

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

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

    38 // ------------------------------------------------------------------

    39 // ciType::ciType

    40 //

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

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

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

    44   _basic_type = basic_type;

    45 }

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

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

    49 }

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

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

    53 }

    56 // ------------------------------------------------------------------

    57 // ciType::is_subtype_of

    58 //

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

    60   if (this == type)  return true;

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

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

    63   return false;

    64 }

    66 // ------------------------------------------------------------------

    67 // ciType::print_impl

    68 //

    69 // Implementation of the print method.

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

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

    72   print_name_on(st);

    73 }

    75 // ------------------------------------------------------------------

    76 // ciType::print_name

    77 //

    78 // Print the name of this type

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

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

    81 }

    85 // ------------------------------------------------------------------

    86 // ciType::java_mirror

    87 //

    88 ciInstance* ciType::java_mirror() {

    89   VM_ENTRY_MARK;

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

    91 }

    93 // ------------------------------------------------------------------

    94 // ciType::box_klass

    95 //

    96 ciKlass* ciType::box_klass() {

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

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

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

   102   VM_ENTRY_MARK;

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

   104 }

   107 // ------------------------------------------------------------------

   108 // ciType::make

   109 //

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

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

   112 // Does not work on T_ARRAY.

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

   114   // short, etc.

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

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

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

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

   119   return _basic_types[t];

   120 }

   122 // ciReturnAddress

   123 //

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

   125 // bytecodes.

   127 // ------------------------------------------------------------------

   128 // ciReturnAddress::ciReturnAddress

   129 //

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

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

   132   _bci = bci;

   133 }

   135 // ------------------------------------------------------------------

   136 // ciReturnAddress::print_impl

   137 //

   138 // Implementation of the print method.

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

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

   141 }

   143 // ------------------------------------------------------------------

   144 // ciReturnAddress::make

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

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

   147 }

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