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/*
* Copyright (c) 1999, 2012, 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"
// 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;
private:
ciSymbol* _name;
jint _layout_helper;
protected:
ciKlass(KlassHandle k_h, 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(KlassHandle k_h);
// 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);
};
#endif // SHARE_VM_CI_CIKLASS_HPP
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