| /* |
| * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_CI_CIKLASS_HPP |
| #define SHARE_VM_CI_CIKLASS_HPP |
| |
| #include "ci/ciType.hpp" |
| #include "oops/klass.hpp" |
| |
| // ciKlass |
| // |
| // This class and its subclasses represent Klass*s in the |
| // HotSpot virtual machine. In the vm, each Klass* contains an |
| // embedded Klass object. ciKlass is subclassed to explicitly |
| // represent the kind of Klass embedded in the Klass*. For |
| // example, a Klass* with an embedded ObjArrayKlass object is |
| // represented in the ciObject hierarchy by the class |
| // ciObjArrayKlass. |
| class ciKlass : public ciType { |
| CI_PACKAGE_ACCESS |
| friend class ciEnv; |
| friend class ciField; |
| friend class ciMethod; |
| friend class ciMethodData; |
| friend class ciObjArrayKlass; |
| friend class ciReceiverTypeData; |
| |
| private: |
| ciSymbol* _name; |
| jint _layout_helper; |
| |
| protected: |
| ciKlass(Klass* k, ciSymbol* name); |
| ciKlass(ciSymbol* name, BasicType bt); |
| |
| Klass* get_Klass() const { |
| Klass* k = (Klass*)_metadata; |
| assert(k != NULL, "illegal use of unloaded klass"); |
| return k; |
| } |
| |
| // Certain subklasses have an associated class loader. |
| virtual oop loader() { return NULL; } |
| virtual jobject loader_handle() { return NULL; } |
| |
| virtual oop protection_domain() { return NULL; } |
| virtual jobject protection_domain_handle() { return NULL; } |
| |
| const char* type_string() { return "ciKlass"; } |
| |
| void print_impl(outputStream* st); |
| |
| public: |
| ciKlass(Klass* k); |
| |
| // What is the name of this klass? |
| ciSymbol* name() const { return _name; } |
| |
| // What is its layout helper value? |
| jint layout_helper() { return _layout_helper; } |
| |
| bool is_subtype_of(ciKlass* klass); |
| bool is_subclass_of(ciKlass* klass); |
| juint super_depth(); |
| juint super_check_offset(); |
| ciKlass* super_of_depth(juint i); |
| bool can_be_primary_super(); |
| static juint primary_super_limit() { return Klass::primary_super_limit(); } |
| |
| // Is this ciObject the ciInstanceKlass representing java.lang.Object()? |
| virtual bool is_java_lang_Object() const { return false; } |
| |
| // Get the shared parent of two klasses. |
| ciKlass* least_common_ancestor(ciKlass* k); |
| |
| virtual bool is_interface() { |
| return false; |
| } |
| |
| virtual bool is_abstract() { |
| return false; |
| } |
| |
| // Does this type (array, class, interface) have no subtypes? |
| virtual bool is_leaf_type() { |
| return false; |
| } |
| |
| // Attempt to get a klass using this ciKlass's loader. |
| ciKlass* find_klass(ciSymbol* klass_name); |
| // Note: To find a class from its name string, use ciSymbol::make, |
| // but consider adding to vmSymbols.hpp instead. |
| |
| // Get the instance of java.lang.Class corresponding to this klass. |
| ciInstance* java_mirror(); |
| |
| // Fetch Klass::modifier_flags. |
| jint modifier_flags(); |
| |
| // Fetch Klass::access_flags. |
| jint access_flags(); |
| |
| // What kind of ciObject is this? |
| bool is_klass() const { return true; } |
| |
| virtual ciKlass* exact_klass() = 0; |
| |
| void print_name_on(outputStream* st); |
| |
| const char* external_name() const; |
| }; |
| |
| #endif // SHARE_VM_CI_CIKLASS_HPP |