| /* |
| * Copyright (c) 2014, 2018, 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. |
| * |
| */ |
| #include "precompiled.hpp" |
| #include "classfile/javaClasses.inline.hpp" |
| #include "jfr/leakprofiler/chains/edge.hpp" |
| #include "jfr/leakprofiler/utilities/unifiedOop.hpp" |
| |
| Edge::Edge() : _parent(NULL), _reference(NULL) {} |
| |
| Edge::Edge(const Edge* parent, const oop* reference) : _parent(parent), |
| _reference(reference) {} |
| |
| const oop Edge::pointee() const { |
| return UnifiedOop::dereference(_reference); |
| } |
| |
| const oop Edge::reference_owner() const { |
| return is_root() ? (oop)NULL : UnifiedOop::dereference(_parent->reference()); |
| } |
| |
| static const Klass* resolve_klass(const oop obj) { |
| assert(obj != NULL, "invariant"); |
| return java_lang_Class::is_instance(obj) ? |
| java_lang_Class::as_Klass(obj) : obj->klass(); |
| } |
| |
| const Klass* Edge::pointee_klass() const { |
| return resolve_klass(pointee()); |
| } |
| |
| const Klass* Edge::reference_owner_klass() const { |
| const oop ref_owner = reference_owner(); |
| return ref_owner != NULL ? resolve_klass(ref_owner) : NULL; |
| } |
| |
| size_t Edge::distance_to_root() const { |
| size_t depth = 0; |
| const Edge* current = _parent; |
| while (current != NULL) { |
| depth++; |
| current = current->parent(); |
| } |
| return depth; |
| } |