jdk8-mips64-public/hotspot: src/share/vm/ci/ciType.cpp@da91efe96a93

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

     1 /*

     2  * Copyright (c) 2000, 2012, 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/ciEnv.hpp"

    27 #include "ci/ciType.hpp"

    28 #include "ci/ciUtilities.hpp"

    29 #include "classfile/systemDictionary.hpp"

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

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

    34 // ciType

    35 //

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

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

    39 // ------------------------------------------------------------------

    40 // ciType::ciType

    41 //

    42 ciType::ciType(BasicType basic_type) : ciMetadata() {

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

    44   _basic_type = basic_type;

    45 }

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

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

    49 }

    52 // ------------------------------------------------------------------

    53 // ciType::is_subtype_of

    54 //

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

    56   if (this == type)  return true;

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

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

    59   return false;

    60 }

    62 // ------------------------------------------------------------------

    63 // ciType::print_impl

    64 //

    65 // Implementation of the print method.

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

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

    68   print_name_on(st);

    69 }

    71 // ------------------------------------------------------------------

    72 // ciType::print_name

    73 //

    74 // Print the name of this type

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

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

    77 }

    81 // ------------------------------------------------------------------

    82 // ciType::java_mirror

    83 //

    84 ciInstance* ciType::java_mirror() {

    85   VM_ENTRY_MARK;

    86   return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type()));

    87 }

    89 // ------------------------------------------------------------------

    90 // ciType::box_klass

    91 //

    92 ciKlass* ciType::box_klass() {

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

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

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

    98   VM_ENTRY_MARK;

    99   return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type()));

   100 }

   103 // ------------------------------------------------------------------

   104 // ciType::make

   105 //

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

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

   108 // Does not work on T_ARRAY.

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

   110   // short, etc.

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

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

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

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

   115   return _basic_types[t];

   116 }

   118 // ciReturnAddress

   119 //

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

   121 // bytecodes.

   123 // ------------------------------------------------------------------

   124 // ciReturnAddress::ciReturnAddress

   125 //

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

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

   128   _bci = bci;

   129 }

   131 // ------------------------------------------------------------------

   132 // ciReturnAddress::print_impl

   133 //

   134 // Implementation of the print method.

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

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

   137 }

   139 // ------------------------------------------------------------------

   140 // ciReturnAddress::make

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

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

   143 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/ci/ciType.cpp@da91efe96a93

src/share/vm/ci/ciType.cpp