jdk8-mips64-public/hotspot: src/share/vm/ci/ciKlass.hpp@dd57230ba8fe

6893268: additional dynamic language related optimizations in C2
Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance.
Reviewed-by: kvn, never

     1 /*

     2  * Copyright 1999-2009 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 // ciKlass

    26 //

    27 // This class and its subclasses represent klassOops in the

    28 // HotSpot virtual machine.  In the vm, each klassOop contains an

    29 // embedded Klass object.  ciKlass is subclassed to explicitly

    30 // represent the kind of Klass embedded in the klassOop.  For

    31 // example, a klassOop with an embedded objArrayKlass object is

    32 // represented in the ciObject hierarchy by the class

    33 // ciObjArrayKlass.

    34 class ciKlass : public ciType {

    35   CI_PACKAGE_ACCESS

    36   friend class ciEnv;

    37   friend class ciField;

    38   friend class ciMethod;

    39   friend class ciObjArrayKlass;

    41 private:

    42   ciSymbol* _name;

    43   jint _layout_helper;

    45 protected:

    46   ciKlass(KlassHandle k_h, ciSymbol* name);

    47   ciKlass(ciSymbol* name, ciKlass* klass);

    49   klassOop get_klassOop() const {

    50     klassOop k = (klassOop)get_oop();

    51     assert(k != NULL, "illegal use of unloaded klass");

    52     return k;

    53   }

    55   Klass*   get_Klass() const { return get_klassOop()->klass_part(); }

    57   // Certain subklasses have an associated class loader.

    58   virtual oop loader()             { return NULL; }

    59   virtual jobject loader_handle()  { return NULL; }

    61   virtual oop protection_domain()             { return NULL; }

    62   virtual jobject protection_domain_handle()  { return NULL; }

    64   const char* type_string() { return "ciKlass"; }

    66   void print_impl(outputStream* st);

    68 public:

    69   ciKlass(KlassHandle k_h);

    71   // What is the name of this klass?

    72   ciSymbol* name() const { return _name; }

    74   // What is its layout helper value?

    75   jint layout_helper() { return _layout_helper; }

    77   bool is_subtype_of(ciKlass* klass);

    78   bool is_subclass_of(ciKlass* klass);

    79   juint super_depth();

    80   juint super_check_offset();

    81   ciKlass* super_of_depth(juint i);

    82   bool can_be_primary_super();

    83   static juint primary_super_limit() { return Klass::primary_super_limit(); }

    85   // Get the shared parent of two klasses.

    86   ciKlass* least_common_ancestor(ciKlass* k);

    88   virtual bool is_interface() {

    89     return false;

    90   }

    92   virtual bool is_abstract() {

    93     return false;

    94   }

    96   // Does this type (array, class, interface) have no subtypes?

    97   virtual bool is_leaf_type() {

    98     return false;

    99   }

   101   // Attempt to get a klass using this ciKlass's loader.

   102   ciKlass* find_klass(ciSymbol* klass_name);

   103   // Note:  To find a class from its name string, use ciSymbol::make,

   104   // but consider adding to vmSymbols.hpp instead.

   106   // Get the instance of java.lang.Class corresponding to this klass.

   107   ciInstance*            java_mirror();

   109   // Fetch Klass::modifier_flags.

   110   jint                   modifier_flags();

   112   // Fetch Klass::access_flags.

   113   jint                   access_flags();

   115   // What kind of ciObject is this?

   116   bool is_klass() { return true; }

   118   void print_name_on(outputStream* st);

   119 };

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

src/share/vm/ci/ciKlass.hpp@dd57230ba8fe

src/share/vm/ci/ciKlass.hpp