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
22 * questions.
23 *
24 */
25
26 class SharkState;
27
28 class 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 };