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 CallLinkInfo_h 27#define CallLinkInfo_h 28 29#include "ClosureCallStubRoutine.h" 30#include "CodeLocation.h" 31#include "CodeSpecializationKind.h" 32#include "JITWriteBarrier.h" 33#include "JSFunction.h" 34#include "Opcode.h" 35#include "WriteBarrier.h" 36#include <wtf/Platform.h> 37#include <wtf/SentinelLinkedList.h> 38 39namespace JSC { 40 41#if ENABLE(JIT) 42 43class RepatchBuffer; 44 45struct CallLinkInfo : public BasicRawSentinelNode<CallLinkInfo> { 46 enum CallType { None, Call, CallVarargs, Construct }; 47 static CallType callTypeFor(OpcodeID opcodeID) 48 { 49 if (opcodeID == op_call || opcodeID == op_call_eval) 50 return Call; 51 if (opcodeID == op_construct) 52 return Construct; 53 ASSERT(opcodeID == op_call_varargs); 54 return CallVarargs; 55 } 56 57 CallLinkInfo() 58 : hasSeenShouldRepatch(false) 59 , isDFG(false) 60 , hasSeenClosure(false) 61 , callType(None) 62 { 63 } 64 65 ~CallLinkInfo() 66 { 67 if (isOnList()) 68 remove(); 69 } 70 71 CodeSpecializationKind specializationKind() const 72 { 73 return specializationFromIsConstruct(callType == Construct); 74 } 75 76 CodeLocationNearCall callReturnLocation; 77 CodeLocationDataLabelPtr hotPathBegin; 78 CodeLocationNearCall hotPathOther; 79 JITWriteBarrier<JSFunction> callee; 80 WriteBarrier<JSFunction> lastSeenCallee; 81 RefPtr<ClosureCallStubRoutine> stub; 82 bool hasSeenShouldRepatch : 1; 83 bool isDFG : 1; 84 bool hasSeenClosure : 1; 85 CallType callType : 5; 86 unsigned calleeGPR : 8; 87 CodeOrigin codeOrigin; 88 89 bool isLinked() { return stub || callee; } 90 void unlink(VM&, RepatchBuffer&); 91 92 bool seenOnce() 93 { 94 return hasSeenShouldRepatch; 95 } 96 97 void setSeen() 98 { 99 hasSeenShouldRepatch = true; 100 } 101}; 102 103inline void* getCallLinkInfoReturnLocation(CallLinkInfo* callLinkInfo) 104{ 105 return callLinkInfo->callReturnLocation.executableAddress(); 106} 107 108inline unsigned getCallLinkInfoBytecodeIndex(CallLinkInfo* callLinkInfo) 109{ 110 return callLinkInfo->codeOrigin.bytecodeIndex; 111} 112#endif // ENABLE(JIT) 113 114} // namespace JSC 115 116#endif // CallLinkInfo_h 117