duke@435: /*
duke@435:  * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // ciInstanceKlass
duke@435: //
duke@435: // This class represents a klassOop in the HotSpot virtual machine
duke@435: // whose Klass part is an instanceKlass.  It may or may not
duke@435: // be loaded.
duke@435: class ciInstanceKlass : public ciKlass {
duke@435:   CI_PACKAGE_ACCESS
duke@435:   friend class ciEnv;
duke@435:   friend class ciMethod;
duke@435:   friend class ciField;
duke@435:   friend class ciBytecodeStream;
duke@435: 
duke@435: private:
duke@435:   bool                   _is_shared;
duke@435: 
duke@435:   jobject                _loader;
duke@435:   jobject                _protection_domain;
duke@435: 
duke@435:   bool                   _is_initialized;
duke@435:   bool                   _is_linked;
duke@435:   bool                   _has_finalizer;
duke@435:   bool                   _has_subklass;
duke@435:   ciFlags                _flags;
duke@435:   jint                   _nonstatic_field_size;
duke@435: 
duke@435:   // Lazy fields get filled in only upon request.
duke@435:   ciInstanceKlass*       _super;
duke@435:   ciInstance*            _java_mirror;
duke@435: 
duke@435:   ciConstantPoolCache*   _field_cache;  // cached map index->field
duke@435:   GrowableArray<ciField*>* _nonstatic_fields;
duke@435: 
duke@435:   enum { implementors_limit = instanceKlass::implementors_limit };
duke@435:   ciInstanceKlass*       _implementors[implementors_limit];
duke@435:   jint                   _nof_implementors;
duke@435: 
duke@435: protected:
duke@435:   ciInstanceKlass(KlassHandle h_k);
duke@435:   ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
duke@435: 
duke@435:   instanceKlass* get_instanceKlass() const {
duke@435:     return (instanceKlass*)get_Klass();
duke@435:   }
duke@435: 
duke@435:   oop loader();
duke@435:   jobject loader_handle();
duke@435: 
duke@435:   oop protection_domain();
duke@435:   jobject protection_domain_handle();
duke@435: 
duke@435:   const char* type_string() { return "ciInstanceKlass"; }
duke@435: 
duke@435:   void print_impl(outputStream* st);
duke@435: 
duke@435:   ciConstantPoolCache* field_cache();
duke@435: 
duke@435:   bool is_shared() { return _is_shared; }
duke@435: 
duke@435:   bool compute_shared_is_initialized();
duke@435:   bool compute_shared_is_linked();
duke@435:   bool compute_shared_has_subklass();
duke@435:   int  compute_shared_nof_implementors();
duke@435:   int  compute_nonstatic_fields();
duke@435:   GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
duke@435: 
duke@435: public:
duke@435:   // Has this klass been initialized?
duke@435:   bool                   is_initialized() {
duke@435:     if (_is_shared && !_is_initialized) {
duke@435:       return is_loaded() && compute_shared_is_initialized();
duke@435:     }
duke@435:     return _is_initialized;
duke@435:   }
duke@435:   // Has this klass been linked?
duke@435:   bool                   is_linked() {
duke@435:     if (_is_shared && !_is_linked) {
duke@435:       return is_loaded() && compute_shared_is_linked();
duke@435:     }
duke@435:     return _is_linked;
duke@435:   }
duke@435: 
duke@435:   // General klass information.
duke@435:   ciFlags                flags()          {
duke@435:     assert(is_loaded(), "must be loaded");
duke@435:     return _flags;
duke@435:   }
duke@435:   bool                   has_finalizer()  {
duke@435:     assert(is_loaded(), "must be loaded");
duke@435:     return _has_finalizer; }
duke@435:   bool                   has_subklass()   {
duke@435:     assert(is_loaded(), "must be loaded");
duke@435:     if (_is_shared && !_has_subklass) {
duke@435:       if (flags().is_final()) {
duke@435:         return false;
duke@435:       } else {
duke@435:         return compute_shared_has_subklass();
duke@435:       }
duke@435:     }
duke@435:     return _has_subklass;
duke@435:   }
duke@435:   jint                   size_helper()  {
duke@435:     return (Klass::layout_helper_size_in_bytes(layout_helper())
duke@435:             >> LogHeapWordSize);
duke@435:   }
duke@435:   jint                   nonstatic_field_size()  {
duke@435:     assert(is_loaded(), "must be loaded");
duke@435:     return _nonstatic_field_size; }
duke@435:   ciInstanceKlass*       super();
duke@435:   jint                   nof_implementors()  {
duke@435:     assert(is_loaded(), "must be loaded");
duke@435:     if (_is_shared)  return compute_shared_nof_implementors();
duke@435:     return _nof_implementors;
duke@435:   }
duke@435: 
duke@435:   ciInstanceKlass* get_canonical_holder(int offset);
duke@435:   ciField* get_field_by_offset(int field_offset, bool is_static);
duke@435:   // total number of nonstatic fields (including inherited):
duke@435:   int nof_nonstatic_fields() {
duke@435:     if (_nonstatic_fields == NULL)
duke@435:       return compute_nonstatic_fields();
duke@435:     else
duke@435:       return _nonstatic_fields->length();
duke@435:   }
duke@435:   // nth nonstatic field (presented by ascending address)
duke@435:   ciField* nonstatic_field_at(int i) {
duke@435:     assert(_nonstatic_fields != NULL, "");
duke@435:     return _nonstatic_fields->at(i);
duke@435:   }
duke@435: 
duke@435:   ciInstanceKlass* unique_concrete_subklass();
duke@435:   bool has_finalizable_subclass();
duke@435: 
duke@435:   bool contains_field_offset(int offset) {
duke@435:       return (offset/wordSize) >= instanceOopDesc::header_size()
duke@435:              && (offset/wordSize)-instanceOopDesc::header_size() < nonstatic_field_size();
duke@435:   }
duke@435: 
duke@435:   // Get the instance of java.lang.Class corresponding to
duke@435:   // this klass.  This instance is used for locking of
duke@435:   // synchronized static methods of this klass.
duke@435:   ciInstance*            java_mirror();
duke@435: 
duke@435:   // Java access flags
duke@435:   bool is_public      () { return flags().is_public(); }
duke@435:   bool is_final       () { return flags().is_final(); }
duke@435:   bool is_super       () { return flags().is_super(); }
duke@435:   bool is_interface   () { return flags().is_interface(); }
duke@435:   bool is_abstract    () { return flags().is_abstract(); }
duke@435: 
duke@435:   ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
duke@435:   // Note:  To find a method from name and type strings, use ciSymbol::make,
duke@435:   // but consider adding to vmSymbols.hpp instead.
duke@435: 
duke@435:   bool is_leaf_type();
duke@435:   ciInstanceKlass* implementor(int n);
duke@435: 
duke@435:   // Is the defining class loader of this class the default loader?
duke@435:   bool uses_default_loader();
duke@435: 
duke@435:   bool is_java_lang_Object();
duke@435: 
duke@435:   // What kind of ciObject is this?
duke@435:   bool is_instance_klass() { return true; }
duke@435:   bool is_java_klass()     { return true; }
duke@435: };