entry_zero.hpp revision 3602:da91efe96a93 
1/*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2009, 2010 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26#ifndef CPU_ZERO_VM_ENTRY_ZERO_HPP
27#define CPU_ZERO_VM_ENTRY_ZERO_HPP
28
29class ZeroEntry {
30 public:
31  ZeroEntry() {
32    ShouldNotCallThis();
33  }
34
35 private:
36  address _entry_point;
37
38 public:
39  address entry_point() const {
40    return _entry_point;
41  }
42  void set_entry_point(address entry_point) {
43    _entry_point = entry_point;
44  }
45
46 private:
47  typedef int (*NormalEntryFunc)(Method* method,
48                                 intptr_t  base_pc,
49                                 TRAPS);
50  typedef int (*OSREntryFunc)(Method* method,
51                              address   osr_buf,
52                              intptr_t  base_pc,
53                              TRAPS);
54
55 public:
56  void invoke(Method* method, TRAPS) const {
57    maybe_deoptimize(
58      ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD),
59      THREAD);
60  }
61  void invoke_osr(Method* method, address osr_buf, TRAPS) const {
62    maybe_deoptimize(
63      ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD),
64      THREAD);
65  }
66
67 private:
68  static void maybe_deoptimize(int deoptimized_frames, TRAPS) {
69    if (deoptimized_frames)
70      CppInterpreter::main_loop(deoptimized_frames - 1, THREAD);
71  }
72
73 public:
74  static ByteSize entry_point_offset() {
75    return byte_offset_of(ZeroEntry, _entry_point);
76  }
77};
78
79#endif // CPU_ZERO_VM_ENTRY_ZERO_HPP
80