jdk

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/*
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 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "gc/shared/collectedHeap.hpp"
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#include "gc/shared/locationPrinter.hpp"
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#include "memory/universe.hpp"
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#include "runtime/os.hpp"
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#include "oops/klass.hpp"
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#include "oops/oop.inline.hpp"
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bool LocationPrinter::is_valid_obj(void* obj) {
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  if (!is_object_aligned(obj)) {
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    return false;
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  }
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  if (obj < (void*)os::min_page_size()) {
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    return false;
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  }
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  // We need at least the mark and the klass word in the committed region.
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  if (!os::is_readable_range(obj, (HeapWord*)obj + oopDesc::header_size())) {
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    return false;
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  }
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  if (!Universe::heap()->is_in(obj)) {
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    return false;
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  }
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  Klass* k = ((oopDesc*)obj)->klass_without_asserts();
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  return Klass::is_valid(k);
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}
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