sharkStateScanner.hpp revision 1612:d2ede61b7a12 
1/*
2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2009 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
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24 */
25
26class SharkState;
27
28class SharkStateScanner : public SharkTargetInvariants {
29 protected:
30  SharkStateScanner(SharkFunction* function)
31    : SharkTargetInvariants(function), _stack(function->stack()) {}
32
33 private:
34  SharkStack* _stack;
35
36 protected:
37  SharkStack* stack() const {
38    return _stack;
39  }
40
41  // Scan the frame
42 public:
43  void scan(SharkState* state);
44
45  // Callbacks
46  // Note that the offsets supplied to the various process_* callbacks
47  // are specified in wordSize words from the frame's unextended_sp.
48 protected:
49  virtual void start_frame()                                                 {}
50
51  virtual void start_stack(int stack_depth)                                  {}
52  virtual void process_stack_slot(int index, SharkValue** value, int offset) {}
53  virtual void end_stack()                                                   {}
54
55  virtual void start_monitors(int num_monitors)                              {}
56  virtual void process_monitor(int index, int box_offset, int obj_offset)    {}
57  virtual void end_monitors()                                                {}
58
59  virtual void start_frame_header()                                          {}
60  virtual void process_oop_tmp_slot(llvm::Value** value, int offset)         {}
61  virtual void process_method_slot(llvm::Value** value, int offset)          {}
62  virtual void process_pc_slot(int offset)                                   {}
63  virtual void end_frame_header()                                            {}
64
65  virtual void start_locals()                                                {}
66  virtual void process_local_slot(int index, SharkValue** value, int offset) {}
67  virtual void end_locals()                                                  {}
68
69  virtual void end_frame()                                                   {}
70
71  // Integrity checks
72 private:
73  void stack_integrity_checks(SharkState* state) PRODUCT_RETURN;
74  void locals_integrity_checks(SharkState* state) PRODUCT_RETURN;
75};
76