| | 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 AbstractPC_h |
| | 27 | #define AbstractPC_h |
| | 28 | |
| | 29 | #include "MacroAssemblerCodeRef.h" |
| | 30 | #include <wtf/Platform.h> |
| | 31 | |
| | 32 | namespace JSC { |
| | 33 | |
| | 34 | class JSGlobalData; |
| | 35 | class ExecState; |
| | 36 | struct Instruction; |
| | 37 | |
| | 38 | class AbstractPC { |
| | 39 | public: |
| | 40 | AbstractPC() |
| | 41 | : m_pointer(0) |
| | 42 | , m_mode(None) |
| | 43 | { |
| | 44 | } |
| | 45 | |
| | 46 | AbstractPC(JSGlobalData&, ExecState*); |
| | 47 | |
| | 48 | #if ENABLE(JIT) |
| | 49 | AbstractPC(ReturnAddressPtr ptr) |
| | 50 | : m_pointer(ptr.value()) |
| | 51 | , m_mode(JIT) |
| | 52 | { |
| | 53 | } |
| | 54 | |
| | 55 | bool hasJITReturnAddress() const { return m_mode == JIT; } |
| | 56 | ReturnAddressPtr jitReturnAddress() const |
| | 57 | { |
| | 58 | ASSERT(hasJITReturnAddress()); |
| | 59 | return ReturnAddressPtr(m_pointer); |
| | 60 | } |
| | 61 | #endif |
| | 62 | |
| | 63 | #if ENABLE(CLASSIC_INTERPRETER) |
| | 64 | AbstractPC(Instruction* vPC) |
| | 65 | : m_pointer(vPC) |
| | 66 | , m_mode(Interpreter) |
| | 67 | { |
| | 68 | } |
| | 69 | |
| | 70 | bool hasInterpreterReturnAddress() const { return m_mode == Interpreter; } |
| | 71 | Instruction* interpreterReturnAddress() const |
| | 72 | { |
| | 73 | ASSERT(hasInterpreterReturnAddress()); |
| | 74 | return static_cast<Instruction*>(m_pointer); |
| | 75 | } |
| | 76 | #endif |
| | 77 | |
| | 78 | bool isSet() const { return m_mode != None; } |
| | 79 | bool operator!() const { return !isSet(); } |
| | 80 | |
| | 81 | private: |
| | 82 | void* m_pointer; |
| | 83 | |
| | 84 | enum Mode { None, JIT, Interpreter }; |
| | 85 | Mode m_mode; |
| | 86 | }; |
| | 87 | |
| | 88 | } // namespace JSC |
| | 89 | |
| | 90 | #endif // AbstractPC_h |
| | 91 | |
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