src/share/vm/ci/ciKlass.hpp

Tue, 23 Nov 2010 13:22:55 -0800

author
stefank
date
Tue, 23 Nov 2010 13:22:55 -0800
changeset 2314
f95d63e2154a
parent 1907
c18cbe5936b8
child 4037
da91efe96a93
permissions
-rw-r--r--

6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

     1 /*
     2  * Copyright (c) 1999, 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 #ifndef SHARE_VM_CI_CIKLASS_HPP
    26 #define SHARE_VM_CI_CIKLASS_HPP
    28 #include "ci/ciType.hpp"
    29 #include "oops/klassOop.hpp"
    31 // ciKlass
    32 //
    33 // This class and its subclasses represent klassOops in the
    34 // HotSpot virtual machine.  In the vm, each klassOop contains an
    35 // embedded Klass object.  ciKlass is subclassed to explicitly
    36 // represent the kind of Klass embedded in the klassOop.  For
    37 // example, a klassOop with an embedded objArrayKlass object is
    38 // represented in the ciObject hierarchy by the class
    39 // ciObjArrayKlass.
    40 class ciKlass : public ciType {
    41   CI_PACKAGE_ACCESS
    42   friend class ciEnv;
    43   friend class ciField;
    44   friend class ciMethod;
    45   friend class ciObjArrayKlass;
    47 private:
    48   ciSymbol* _name;
    49   jint _layout_helper;
    51 protected:
    52   ciKlass(KlassHandle k_h, ciSymbol* name);
    53   ciKlass(ciSymbol* name, ciKlass* klass);
    55   klassOop get_klassOop() const {
    56     klassOop k = (klassOop)get_oop();
    57     assert(k != NULL, "illegal use of unloaded klass");
    58     return k;
    59   }
    61   Klass*   get_Klass() const { return get_klassOop()->klass_part(); }
    63   // Certain subklasses have an associated class loader.
    64   virtual oop loader()             { return NULL; }
    65   virtual jobject loader_handle()  { return NULL; }
    67   virtual oop protection_domain()             { return NULL; }
    68   virtual jobject protection_domain_handle()  { return NULL; }
    70   const char* type_string() { return "ciKlass"; }
    72   void print_impl(outputStream* st);
    74 public:
    75   ciKlass(KlassHandle k_h);
    77   // What is the name of this klass?
    78   ciSymbol* name() const { return _name; }
    80   // What is its layout helper value?
    81   jint layout_helper() { return _layout_helper; }
    83   bool is_subtype_of(ciKlass* klass);
    84   bool is_subclass_of(ciKlass* klass);
    85   juint super_depth();
    86   juint super_check_offset();
    87   ciKlass* super_of_depth(juint i);
    88   bool can_be_primary_super();
    89   static juint primary_super_limit() { return Klass::primary_super_limit(); }
    91   // Get the shared parent of two klasses.
    92   ciKlass* least_common_ancestor(ciKlass* k);
    94   virtual bool is_interface() {
    95     return false;
    96   }
    98   virtual bool is_abstract() {
    99     return false;
   100   }
   102   // Does this type (array, class, interface) have no subtypes?
   103   virtual bool is_leaf_type() {
   104     return false;
   105   }
   107   // Attempt to get a klass using this ciKlass's loader.
   108   ciKlass* find_klass(ciSymbol* klass_name);
   109   // Note:  To find a class from its name string, use ciSymbol::make,
   110   // but consider adding to vmSymbols.hpp instead.
   112   // Get the instance of java.lang.Class corresponding to this klass.
   113   ciInstance*            java_mirror();
   115   // Fetch Klass::modifier_flags.
   116   jint                   modifier_flags();
   118   // Fetch Klass::access_flags.
   119   jint                   access_flags();
   121   // What kind of ciObject is this?
   122   bool is_klass() { return true; }
   124   void print_name_on(outputStream* st);
   125 };
   127 #endif // SHARE_VM_CI_CIKLASS_HPP

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