edge.cpp

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "precompiled.hpp"
#include "classfile/javaClasses.inline.hpp"
#include "jfr/leakprofiler/chains/edge.hpp"
#include "jfr/leakprofiler/utilities/unifiedOopRef.inline.hpp"

Edge::Edge(const Edge* parent, UnifiedOopRef reference) : _parent(parent),
                                                          _reference(reference) {}

const oop Edge::pointee() const {
  return _reference.dereference();
}

const oop Edge::reference_owner() const {
  return is_root() ? (oop)NULL : _parent->pointee();
}

size_t Edge::distance_to_root() const {
  size_t depth = 0;
  const Edge* current = _parent;
  while (current != NULL) {
    depth++;
    current = current->parent();
  }
  return depth;
}