1 /*
2 * Copyright (c) 2002, 2014, 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_implementation/shared/spaceDecorator.hpp"
27 #include "memory/space.inline.hpp"
28 #include "utilities/copy.hpp"
29
30 // Catch-all file for utility classes
31
32 #ifndef PRODUCT
33
34 // Returns true is the location q matches the mangling
35 // pattern.
36 bool SpaceMangler::is_mangled(HeapWord* q) {
37 // This test loses precision but is good enough
38 return badHeapWord == (max_juint & (uintptr_t) q->value());
39 }
40
41
42 void SpaceMangler::set_top_for_allocations(HeapWord* v) {
43 if (v < end()) {
44 assert(!CheckZapUnusedHeapArea || is_mangled(v),
45 "The high water mark is not mangled");
46 }
47 _top_for_allocations = v;
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1 /*
2 * Copyright (c) 2002, 2015, 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/space.inline.hpp"
27 #include "gc/shared/spaceDecorator.hpp"
28 #include "utilities/copy.hpp"
29
30 // Catch-all file for utility classes
31
32 #ifndef PRODUCT
33
34 // Returns true is the location q matches the mangling
35 // pattern.
36 bool SpaceMangler::is_mangled(HeapWord* q) {
37 // This test loses precision but is good enough
38 return badHeapWord == (max_juint & (uintptr_t) q->value());
39 }
40
41
42 void SpaceMangler::set_top_for_allocations(HeapWord* v) {
43 if (v < end()) {
44 assert(!CheckZapUnusedHeapArea || is_mangled(v),
45 "The high water mark is not mangled");
46 }
47 _top_for_allocations = v;
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