1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef CallReturnOffsetToBytecodeOffset_h
27#define CallReturnOffsetToBytecodeOffset_h
28
29namespace JSC {
30
31#if ENABLE(JIT)
32// This structure is used to map from a call return location
33// (given as an offset in bytes into the JIT code) back to
34// the bytecode index of the corresponding bytecode operation.
35// This is then used to look up the corresponding handler.
36// FIXME: This should be made inlining aware! Currently it isn't
37// because we never inline code that has exception handlers.
38struct CallReturnOffsetToBytecodeOffset {
39    CallReturnOffsetToBytecodeOffset(unsigned callReturnOffset, unsigned bytecodeOffset)
40        : callReturnOffset(callReturnOffset)
41        , bytecodeOffset(bytecodeOffset)
42    {
43    }
44
45    unsigned callReturnOffset;
46    unsigned bytecodeOffset;
47};
48
49inline unsigned getCallReturnOffset(CallReturnOffsetToBytecodeOffset* pc)
50{
51    return pc->callReturnOffset;
52}
53#endif
54
55} // namespace JSC
56
57#endif // CallReturnOffsetToBytecodeOffset_h
58
59