1 /*
  2  * Copyright (c) 1999, 2021, 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  */
 24 
 25 #ifndef SHARE_CI_CIMETADATA_HPP
 26 #define SHARE_CI_CIMETADATA_HPP
 27 
 28 #include "ci/ciBaseObject.hpp"
 29 #include "ci/ciClassList.hpp"
 30 #include "runtime/handles.hpp"
 31 
 32 // ciMetadata
 33 //
 34 // Compiler interface to metadata object in the VM, not Java object.
 35 
 36 class ciMetadata: public ciBaseObject {
 37   CI_PACKAGE_ACCESS
 38   friend class ciEnv;
 39 
 40  protected:
 41   Metadata* _metadata;
 42 
 43   ciMetadata(): _metadata(NULL) {}
 44   ciMetadata(Metadata* o): _metadata(o) {}
 45 
 46   virtual bool is_classless() const;
 47  public:
 48   bool is_loaded() const { return _metadata != NULL || is_classless(); }
 49 
 50   virtual bool is_metadata() const          { return true; }
 51 
 52   virtual bool is_type() const              { return false; }
 53   virtual bool is_return_address() const    { return false; }
 54   virtual bool is_method() const            { return false; }
 55   virtual bool is_method_data() const       { return false; }
 56   virtual bool is_klass() const             { return false; }
 57   virtual bool is_instance_klass() const    { return false; }
 58   virtual bool is_inlinetype() const        { return false; }
 59   virtual bool is_array_klass() const       { return false; }
 60   virtual bool is_flat_array_klass() const  { return false; }
 61   virtual bool is_obj_array_klass() const   { return false; }
 62   virtual bool is_type_array_klass() const  { return false; }
 63   virtual bool is_wrapper() const           { return false; }
 64   virtual bool flatten_array() const        { return false; }
 65   virtual void dump_replay_data(outputStream* st) { /* do nothing */ }
 66 
 67   ciMethod*                as_method() {
 68     assert(is_method(), "bad cast");
 69     return (ciMethod*)this;
 70   }
 71   ciMethodData*            as_method_data() {
 72     assert(is_method_data(), "bad cast");
 73     return (ciMethodData*)this;
 74   }
 75   ciSymbol*                as_symbol() {
 76     assert(is_symbol(), "bad cast");
 77     return (ciSymbol*)this;
 78   }
 79   ciType*                  as_type() {
 80     assert(is_type(), "bad cast");
 81     return (ciType*)this;
 82   }
 83   ciReturnAddress*         as_return_address() {
 84     assert(is_return_address(), "bad cast");
 85     return (ciReturnAddress*)this;
 86   }
 87   ciKlass*                 as_klass() {
 88     assert(is_klass(), "bad cast");
 89     return (ciKlass*)this;
 90   }
 91   ciInstanceKlass*         as_instance_klass() {
 92     assert(is_instance_klass(), "bad cast");
 93     return (ciInstanceKlass*)this;
 94   }
 95   ciArrayKlass*            as_array_klass() {
 96     assert(is_array_klass(), "bad cast");
 97     return (ciArrayKlass*)this;
 98   }
 99   ciFlatArrayKlass*        as_flat_array_klass() {
100     assert(is_flat_array_klass(), "bad cast");
101     return (ciFlatArrayKlass*)this;
102   }
103   ciObjArrayKlass*         as_obj_array_klass() {
104     assert(is_obj_array_klass(), "bad cast");
105     return (ciObjArrayKlass*)this;
106   }
107   ciTypeArrayKlass*        as_type_array_klass() {
108     assert(is_type_array_klass(), "bad cast");
109     return (ciTypeArrayKlass*)this;
110   }
111   ciInlineKlass*           as_inline_klass() {
112     assert(is_inlinetype(), "bad cast");
113     return (ciInlineKlass*)this;
114   }
115   ciWrapper*               as_wrapper() {
116     assert(is_wrapper(), "bad cast");
117     return (ciWrapper*)this;
118   }
119 
120   Metadata* constant_encoding() { return _metadata; }
121 
122   bool equals(ciMetadata* obj) const { return (this == obj); }
123 
124   int hash() { return ident() * 31; } // ???
125 
126   void print(outputStream* st);
127   virtual void print_impl(outputStream* st) {}
128   virtual const char* type_string() { return "ciMetadata"; }
129 
130   void print()  { print(tty); }
131   void print_metadata(outputStream* st = tty);
132 
133 };
134 #endif // SHARE_CI_CIMETADATA_HPP