1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciKlass.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,130 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_CI_CIKLASS_HPP
1.29 +#define SHARE_VM_CI_CIKLASS_HPP
1.30 +
1.31 +#include "ci/ciType.hpp"
1.32 +
1.33 +// ciKlass
1.34 +//
1.35 +// This class and its subclasses represent Klass*s in the
1.36 +// HotSpot virtual machine. In the vm, each Klass* contains an
1.37 +// embedded Klass object. ciKlass is subclassed to explicitly
1.38 +// represent the kind of Klass embedded in the Klass*. For
1.39 +// example, a Klass* with an embedded ObjArrayKlass object is
1.40 +// represented in the ciObject hierarchy by the class
1.41 +// ciObjArrayKlass.
1.42 +class ciKlass : public ciType {
1.43 + CI_PACKAGE_ACCESS
1.44 + friend class ciEnv;
1.45 + friend class ciField;
1.46 + friend class ciMethod;
1.47 + friend class ciMethodData;
1.48 + friend class ciObjArrayKlass;
1.49 +
1.50 +private:
1.51 + ciSymbol* _name;
1.52 + jint _layout_helper;
1.53 +
1.54 +protected:
1.55 + ciKlass(KlassHandle k_h, ciSymbol* name);
1.56 + ciKlass(ciSymbol* name, BasicType bt);
1.57 +
1.58 + Klass* get_Klass() const {
1.59 + Klass* k = (Klass*)_metadata;
1.60 + assert(k != NULL, "illegal use of unloaded klass");
1.61 + return k;
1.62 + }
1.63 +
1.64 + // Certain subklasses have an associated class loader.
1.65 + virtual oop loader() { return NULL; }
1.66 + virtual jobject loader_handle() { return NULL; }
1.67 +
1.68 + virtual oop protection_domain() { return NULL; }
1.69 + virtual jobject protection_domain_handle() { return NULL; }
1.70 +
1.71 + const char* type_string() { return "ciKlass"; }
1.72 +
1.73 + void print_impl(outputStream* st);
1.74 +
1.75 +public:
1.76 + ciKlass(KlassHandle k_h);
1.77 +
1.78 + // What is the name of this klass?
1.79 + ciSymbol* name() const { return _name; }
1.80 +
1.81 + // What is its layout helper value?
1.82 + jint layout_helper() { return _layout_helper; }
1.83 +
1.84 + bool is_subtype_of(ciKlass* klass);
1.85 + bool is_subclass_of(ciKlass* klass);
1.86 + juint super_depth();
1.87 + juint super_check_offset();
1.88 + ciKlass* super_of_depth(juint i);
1.89 + bool can_be_primary_super();
1.90 + static juint primary_super_limit() { return Klass::primary_super_limit(); }
1.91 +
1.92 + // Is this ciObject the ciInstanceKlass representing java.lang.Object()?
1.93 + virtual bool is_java_lang_Object() const { return false; }
1.94 +
1.95 + // Get the shared parent of two klasses.
1.96 + ciKlass* least_common_ancestor(ciKlass* k);
1.97 +
1.98 + virtual bool is_interface() {
1.99 + return false;
1.100 + }
1.101 +
1.102 + virtual bool is_abstract() {
1.103 + return false;
1.104 + }
1.105 +
1.106 + // Does this type (array, class, interface) have no subtypes?
1.107 + virtual bool is_leaf_type() {
1.108 + return false;
1.109 + }
1.110 +
1.111 + // Attempt to get a klass using this ciKlass's loader.
1.112 + ciKlass* find_klass(ciSymbol* klass_name);
1.113 + // Note: To find a class from its name string, use ciSymbol::make,
1.114 + // but consider adding to vmSymbols.hpp instead.
1.115 +
1.116 + // Get the instance of java.lang.Class corresponding to this klass.
1.117 + ciInstance* java_mirror();
1.118 +
1.119 + // Fetch Klass::modifier_flags.
1.120 + jint modifier_flags();
1.121 +
1.122 + // Fetch Klass::access_flags.
1.123 + jint access_flags();
1.124 +
1.125 + // What kind of ciObject is this?
1.126 + bool is_klass() const { return true; }
1.127 +
1.128 + virtual ciKlass* exact_klass() = 0;
1.129 +
1.130 + void print_name_on(outputStream* st);
1.131 +};
1.132 +
1.133 +#endif // SHARE_VM_CI_CIKLASS_HPP
