projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 6fe7ccc8 A |
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 "CodeLocation.h" | |
| 30 | #include "JITWriteBarrier.h" | |
| 31 | #include "JSFunction.h" | |
| 32 | #include "Opcode.h" | |
| 33 | #include "WriteBarrier.h" | |
| 34 | #include <wtf/Platform.h> | |
| 35 | #include <wtf/SentinelLinkedList.h> | |
| 36 | ||
| 37 | namespace JSC { | |
| 38 | ||
| 39 | #if ENABLE(JIT) | |
| 40 | ||
| 41 | class RepatchBuffer; | |
| 42 | ||
| 43 | struct CallLinkInfo : public BasicRawSentinelNode<CallLinkInfo> { | |
| 44 | enum CallType { None, Call, CallVarargs, Construct }; | |
| 45 | static CallType callTypeFor(OpcodeID opcodeID) | |
| 46 | { | |
| 47 | if (opcodeID == op_call || opcodeID == op_call_eval) | |
| 48 | return Call; | |
| 49 | if (opcodeID == op_construct) | |
| 50 | return Construct; | |
| 51 | ASSERT(opcodeID == op_call_varargs); | |
| 52 | return CallVarargs; | |
| 53 | } | |
| 54 | ||
| 55 | CallLinkInfo() | |
| 56 | : hasSeenShouldRepatch(false) | |
| 57 | , isDFG(false) | |
| 58 | , callType(None) | |
| 59 | { | |
| 60 | } | |
| 61 | ||
| 62 | ~CallLinkInfo() | |
| 63 | { | |
| 64 | if (isOnList()) | |
| 65 | remove(); | |
| 66 | } | |
| 67 | ||
| 68 | CodeLocationLabel callReturnLocation; // it's a near call in the old JIT, or a normal call in DFG | |
| 69 | CodeLocationDataLabelPtr hotPathBegin; | |
| 70 | CodeLocationNearCall hotPathOther; | |
| 71 | JITWriteBarrier<JSFunction> callee; | |
| 72 | WriteBarrier<JSFunction> lastSeenCallee; | |
| 73 | bool hasSeenShouldRepatch : 1; | |
| 74 | bool isDFG : 1; | |
| 75 | CallType callType : 6; | |
| 76 | unsigned bytecodeIndex; | |
| 77 | ||
| 78 | bool isLinked() { return callee; } | |
| 79 | void unlink(JSGlobalData&, RepatchBuffer&); | |
| 80 | ||
| 81 | bool seenOnce() | |
| 82 | { | |
| 83 | return hasSeenShouldRepatch; | |
| 84 | } | |
| 85 | ||
| 86 | void setSeen() | |
| 87 | { | |
| 88 | hasSeenShouldRepatch = true; | |
| 89 | } | |
| 90 | }; | |
| 91 | ||
| 92 | inline void* getCallLinkInfoReturnLocation(CallLinkInfo* callLinkInfo) | |
| 93 | { | |
| 94 | return callLinkInfo->callReturnLocation.executableAddress(); | |
| 95 | } | |
| 96 | ||
| 97 | inline unsigned getCallLinkInfoBytecodeIndex(CallLinkInfo* callLinkInfo) | |
| 98 | { | |
| 99 | return callLinkInfo->bytecodeIndex; | |
| 100 | } | |
| 101 | #endif // ENABLE(JIT) | |
| 102 | ||
| 103 | } // namespace JSC | |
| 104 | ||
| 105 | #endif // CallLinkInfo_h |