entry_zero.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, 2007, 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
26class ZeroEntry {
27 public:
28  ZeroEntry() {
29    ShouldNotCallThis();
30  }
31
32 private:
33  address _entry_point;
34
35 public:
36  address entry_point() const {
37    return _entry_point;
38  }
39  void set_entry_point(address entry_point) {
40    _entry_point = entry_point;
41  }
42
43 private:
44  typedef int (*NormalEntryFunc)(methodOop method,
45                                 intptr_t  base_pc,
46                                 TRAPS);
47  typedef int (*OSREntryFunc)(methodOop method,
48                              address   osr_buf,
49                              intptr_t  base_pc,
50                              TRAPS);
51
52 public:
53  void invoke(methodOop method, TRAPS) const {
54    maybe_deoptimize(
55      ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD),
56      THREAD);
57  }
58  void invoke_osr(methodOop method, address osr_buf, TRAPS) const {
59    maybe_deoptimize(
60      ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD),
61      THREAD);
62  }
63
64 private:
65  static void maybe_deoptimize(int deoptimized_frames, TRAPS) {
66    if (deoptimized_frames)
67      CppInterpreter::main_loop(deoptimized_frames - 1, THREAD);
68  }
69
70 public:
71  static ByteSize entry_point_offset() {
72    return byte_offset_of(ZeroEntry, _entry_point);
73  }
74};
75