aoqi@0: /*
aoqi@0:  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_CI_CIINSTANCEKLASS_HPP
aoqi@0: #define SHARE_VM_CI_CIINSTANCEKLASS_HPP
aoqi@0: 
aoqi@0: #include "ci/ciConstantPoolCache.hpp"
aoqi@0: #include "ci/ciFlags.hpp"
aoqi@0: #include "ci/ciKlass.hpp"
aoqi@0: #include "ci/ciSymbol.hpp"
aoqi@0: 
aoqi@0: // ciInstanceKlass
aoqi@0: //
aoqi@0: // This class represents a Klass* in the HotSpot virtual machine
aoqi@0: // whose Klass part is an InstanceKlass.  It may or may not
aoqi@0: // be loaded.
aoqi@0: class ciInstanceKlass : public ciKlass {
aoqi@0:   CI_PACKAGE_ACCESS
aoqi@0:   friend class ciBytecodeStream;
aoqi@0:   friend class ciEnv;
aoqi@0:   friend class ciExceptionHandler;
aoqi@0:   friend class ciMethod;
aoqi@0:   friend class ciField;
aoqi@0: 
aoqi@0: private:
aoqi@0:   jobject                _loader;
aoqi@0:   jobject                _protection_domain;
aoqi@0: 
aoqi@0:   InstanceKlass::ClassState _init_state;           // state of class
aoqi@0:   bool                   _is_shared;
aoqi@0:   bool                   _has_finalizer;
aoqi@0:   bool                   _has_subklass;
aoqi@0:   bool                   _has_nonstatic_fields;
aoqi@0:   bool                   _has_default_methods;
aoqi@0: 
aoqi@0:   ciFlags                _flags;
aoqi@0:   jint                   _nonstatic_field_size;
aoqi@0:   jint                   _nonstatic_oop_map_size;
aoqi@0: 
aoqi@0:   // Lazy fields get filled in only upon request.
aoqi@0:   ciInstanceKlass*       _super;
aoqi@0:   ciInstance*            _java_mirror;
aoqi@0: 
aoqi@0:   ciConstantPoolCache*   _field_cache;  // cached map index->field
aoqi@0:   GrowableArray<ciField*>* _nonstatic_fields;
aoqi@0: 
aoqi@0:   // The possible values of the _implementor fall into following three cases:
aoqi@0:   //   NULL: no implementor.
aoqi@0:   //   A ciInstanceKlass that's not itself: one implementor.
aoqi@0:   //   Itsef: more than one implementors.
aoqi@0:   ciInstanceKlass*       _implementor;
aoqi@0: 
aoqi@0:   GrowableArray<ciField*>* _non_static_fields;
aoqi@0: 
aoqi@0: protected:
aoqi@0:   ciInstanceKlass(KlassHandle h_k);
aoqi@0:   ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
aoqi@0: 
aoqi@0:   InstanceKlass* get_instanceKlass() const {
aoqi@0:     return (InstanceKlass*)get_Klass();
aoqi@0:   }
aoqi@0: 
aoqi@0:   oop loader();
aoqi@0:   jobject loader_handle();
aoqi@0: 
aoqi@0:   oop protection_domain();
aoqi@0:   jobject protection_domain_handle();
aoqi@0: 
aoqi@0:   const char* type_string() { return "ciInstanceKlass"; }
aoqi@0: 
aoqi@0:   bool is_in_package_impl(const char* packagename, int len);
aoqi@0: 
aoqi@0:   void print_impl(outputStream* st);
aoqi@0: 
aoqi@0:   ciConstantPoolCache* field_cache();
aoqi@0: 
aoqi@0:   bool is_shared() { return _is_shared; }
aoqi@0: 
aoqi@0:   void compute_shared_init_state();
aoqi@0:   bool compute_shared_has_subklass();
aoqi@0:   int  compute_nonstatic_fields();
aoqi@0:   GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
aoqi@0: 
aoqi@0:   // Update the init_state for shared klasses
aoqi@0:   void update_if_shared(InstanceKlass::ClassState expected) {
aoqi@0:     if (_is_shared && _init_state != expected) {
aoqi@0:       if (is_loaded()) compute_shared_init_state();
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0: public:
aoqi@0:   // Has this klass been initialized?
aoqi@0:   bool                   is_initialized() {
aoqi@0:     update_if_shared(InstanceKlass::fully_initialized);
aoqi@0:     return _init_state == InstanceKlass::fully_initialized;
aoqi@0:   }
aoqi@0:   // Is this klass being initialized?
aoqi@0:   bool                   is_being_initialized() {
aoqi@0:     update_if_shared(InstanceKlass::being_initialized);
aoqi@0:     return _init_state == InstanceKlass::being_initialized;
aoqi@0:   }
aoqi@0:   // Has this klass been linked?
aoqi@0:   bool                   is_linked() {
aoqi@0:     update_if_shared(InstanceKlass::linked);
aoqi@0:     return _init_state >= InstanceKlass::linked;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // General klass information.
aoqi@0:   ciFlags                flags()          {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     return _flags;
aoqi@0:   }
aoqi@0:   bool                   has_finalizer()  {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     return _has_finalizer; }
aoqi@0:   bool                   has_subklass()   {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     if (_is_shared && !_has_subklass) {
aoqi@0:       if (flags().is_final()) {
aoqi@0:         return false;
aoqi@0:       } else {
aoqi@0:         return compute_shared_has_subklass();
aoqi@0:       }
aoqi@0:     }
aoqi@0:     return _has_subklass;
aoqi@0:   }
aoqi@0:   jint                   size_helper()  {
aoqi@0:     return (Klass::layout_helper_size_in_bytes(layout_helper())
aoqi@0:             >> LogHeapWordSize);
aoqi@0:   }
aoqi@0:   jint                   nonstatic_field_size()  {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     return _nonstatic_field_size; }
aoqi@0:   jint                   has_nonstatic_fields()  {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     return _has_nonstatic_fields; }
aoqi@0:   jint                   nonstatic_oop_map_size()  {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     return _nonstatic_oop_map_size; }
aoqi@0:   ciInstanceKlass*       super();
aoqi@0:   jint                   nof_implementors() {
aoqi@0:     ciInstanceKlass* impl;
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     impl = implementor();
aoqi@0:     if (impl == NULL) {
aoqi@0:       return 0;
aoqi@0:     } else if (impl != this) {
aoqi@0:       return 1;
aoqi@0:     } else {
aoqi@0:       return 2;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   bool has_default_methods()  {
aoqi@0:     assert(is_loaded(), "must be loaded");
aoqi@0:     return _has_default_methods;
aoqi@0:   }
aoqi@0: 
aoqi@0:   ciInstanceKlass* get_canonical_holder(int offset);
aoqi@0:   ciField* get_field_by_offset(int field_offset, bool is_static);
aoqi@0:   ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
aoqi@0: 
aoqi@0:   GrowableArray<ciField*>* non_static_fields();
aoqi@0: 
aoqi@0:   // total number of nonstatic fields (including inherited):
aoqi@0:   int nof_nonstatic_fields() {
aoqi@0:     if (_nonstatic_fields == NULL)
aoqi@0:       return compute_nonstatic_fields();
aoqi@0:     else
aoqi@0:       return _nonstatic_fields->length();
aoqi@0:   }
aoqi@0:   // nth nonstatic field (presented by ascending address)
aoqi@0:   ciField* nonstatic_field_at(int i) {
aoqi@0:     assert(_nonstatic_fields != NULL, "");
aoqi@0:     return _nonstatic_fields->at(i);
aoqi@0:   }
aoqi@0: 
aoqi@0:   ciInstanceKlass* unique_concrete_subklass();
aoqi@0:   bool has_finalizable_subclass();
aoqi@0: 
aoqi@0:   bool contains_field_offset(int offset) {
aoqi@0:     return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Get the instance of java.lang.Class corresponding to
aoqi@0:   // this klass.  This instance is used for locking of
aoqi@0:   // synchronized static methods of this klass.
aoqi@0:   ciInstance*            java_mirror();
aoqi@0: 
aoqi@0:   // Java access flags
aoqi@0:   bool is_public      () { return flags().is_public(); }
aoqi@0:   bool is_final       () { return flags().is_final(); }
aoqi@0:   bool is_super       () { return flags().is_super(); }
aoqi@0:   bool is_interface   () { return flags().is_interface(); }
aoqi@0:   bool is_abstract    () { return flags().is_abstract(); }
aoqi@0: 
aoqi@0:   ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
aoqi@0:   // Note:  To find a method from name and type strings, use ciSymbol::make,
aoqi@0:   // but consider adding to vmSymbols.hpp instead.
aoqi@0: 
aoqi@0:   bool is_leaf_type();
aoqi@0:   ciInstanceKlass* implementor();
aoqi@0: 
aoqi@0:   // Is the defining class loader of this class the default loader?
aoqi@0:   bool uses_default_loader() const;
aoqi@0: 
aoqi@0:   bool is_java_lang_Object() const;
aoqi@0: 
aoqi@0:   BasicType box_klass_type() const;
aoqi@0:   bool is_box_klass() const;
aoqi@0:   bool is_boxed_value_offset(int offset) const;
aoqi@0: 
aoqi@0:   // Is this klass in the given package?
aoqi@0:   bool is_in_package(const char* packagename) {
aoqi@0:     return is_in_package(packagename, (int) strlen(packagename));
aoqi@0:   }
aoqi@0:   bool is_in_package(const char* packagename, int len);
aoqi@0: 
aoqi@0:   // What kind of ciObject is this?
aoqi@0:   bool is_instance_klass() const { return true; }
aoqi@0:   bool is_java_klass() const     { return true; }
aoqi@0: 
aoqi@0:   virtual ciKlass* exact_klass() {
aoqi@0:     if (is_loaded() && is_final() && !is_interface()) {
aoqi@0:       return this;
aoqi@0:     }
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Dump the current state of this klass for compilation replay.
aoqi@0:   virtual void dump_replay_data(outputStream* out);
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_CI_CIINSTANCEKLASS_HPP