1/*
2 * Copyright (c) 2018, 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#ifndef SHARE_GC_SHARED_BARRIERSETNMETHOD_HPP
26#define SHARE_GC_SHARED_BARRIERSETNMETHOD_HPP
27
28#include "memory/allocation.hpp"
29#include "utilities/globalDefinitions.hpp"
30#include "utilities/sizes.hpp"
31
32class nmethod;
33
34class BarrierSetNMethod: public CHeapObj<mtGC> {
35 bool supports_entry_barrier(nmethod* nm);
36 void deoptimize(nmethod* nm, address* return_addr_ptr);
37
38protected:
39 virtual int disarmed_value() const;
40 virtual bool nmethod_entry_barrier(nmethod* nm) = 0;
41
42public:
43 virtual ByteSize thread_disarmed_offset() const = 0;
44
45 static int nmethod_stub_entry_barrier(address* return_address_ptr);
46 bool nmethod_osr_entry_barrier(nmethod* nm);
47 bool is_armed(nmethod* nm);
48 void disarm(nmethod* nm);
49};
50
51
52#endif // SHARE_GC_SHARED_BARRIERSETNMETHOD_HPP
53