1/* 2 * Copyright (C) 2012, 2014 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/SentinelLinkedList.h> 37 38namespace JSC { 39 40#if ENABLE(JIT) 41 42class RepatchBuffer; 43 44struct CallLinkInfo : public BasicRawSentinelNode<CallLinkInfo> { 45 enum CallType { None, Call, CallVarargs, Construct, ConstructVarargs }; 46 static CallType callTypeFor(OpcodeID opcodeID) 47 { 48 if (opcodeID == op_call || opcodeID == op_call_eval) 49 return Call; 50 if (opcodeID == op_construct) 51 return Construct; 52 if (opcodeID == op_construct_varargs) 53 return ConstructVarargs; 54 ASSERT(opcodeID == op_call_varargs); 55 return CallVarargs; 56 } 57 58 CallLinkInfo() 59 : isFTL(false) 60 , hasSeenShouldRepatch(false) 61 , hasSeenClosure(false) 62 , callType(None) 63 , slowPathCount(0) 64 { 65 } 66 67 ~CallLinkInfo() 68 { 69 if (isOnList()) 70 remove(); 71 } 72 73 CodeSpecializationKind specializationKind() const 74 { 75 return specializationFromIsConstruct(callType == Construct || callType == ConstructVarargs); 76 } 77 78 CodeLocationNearCall callReturnLocation; 79 CodeLocationDataLabelPtr hotPathBegin; 80 CodeLocationNearCall hotPathOther; 81 JITWriteBarrier<JSFunction> callee; 82 WriteBarrier<JSFunction> lastSeenCallee; 83 RefPtr<ClosureCallStubRoutine> stub; 84 bool isFTL : 1; 85 bool hasSeenShouldRepatch : 1; 86 bool hasSeenClosure : 1; 87 unsigned callType : 5; // CallType 88 unsigned calleeGPR : 8; 89 unsigned slowPathCount; 90 CodeOrigin codeOrigin; 91 92 bool isLinked() { return stub || callee; } 93 void unlink(RepatchBuffer&); 94 95 bool seenOnce() 96 { 97 return hasSeenShouldRepatch; 98 } 99 100 void setSeen() 101 { 102 hasSeenShouldRepatch = true; 103 } 104 105 void visitWeak(RepatchBuffer&); 106 107 static CallLinkInfo& dummy(); 108}; 109 110inline CodeOrigin getCallLinkInfoCodeOrigin(CallLinkInfo& callLinkInfo) 111{ 112 return callLinkInfo.codeOrigin; 113} 114 115typedef HashMap<CodeOrigin, CallLinkInfo*, CodeOriginApproximateHash> CallLinkInfoMap; 116 117#else // ENABLE(JIT) 118 119typedef HashMap<int, void*> CallLinkInfoMap; 120 121#endif // ENABLE(JIT) 122 123} // namespace JSC 124 125#endif // CallLinkInfo_h 126