|
1 /* |
|
2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
|
4 * |
|
5 * This code is free software; you can redistribute it and/or modify it |
|
6 * under the terms of the GNU General Public License version 2 only, as |
|
7 * published by the Free Software Foundation. |
|
8 * |
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
|
13 * accompanied this code). |
|
14 * |
|
15 * You should have received a copy of the GNU General Public License version |
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
18 * |
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
20 * or visit www.oracle.com if you need additional information or have any |
|
21 * questions. |
|
22 * |
|
23 */ |
|
24 |
|
25 #include "precompiled.hpp" |
|
26 #include "gc/shared/collectedHeap.hpp" |
|
27 #include "gc/shared/locationPrinter.hpp" |
|
28 #include "memory/universe.hpp" |
|
29 #include "runtime/os.hpp" |
|
30 #include "oops/klass.hpp" |
|
31 |
|
32 bool LocationPrinter::is_valid_obj(void* obj) { |
|
33 if (!is_object_aligned(obj)) { |
|
34 return false; |
|
35 } |
|
36 if (obj < (void*)os::min_page_size()) { |
|
37 return false; |
|
38 } |
|
39 |
|
40 // We need at least the mark and the klass word in the committed region. |
|
41 if (!os::is_readable_range(obj, (HeapWord*)obj + oopDesc::header_size())) { |
|
42 return false; |
|
43 } |
|
44 if (!Universe::heap()->is_in(obj)) { |
|
45 return false; |
|
46 } |
|
47 |
|
48 Klass* k = (Klass*)oopDesc::load_klass_raw((oopDesc*)obj); |
|
49 return Klass::is_valid(k); |
|
50 } |