projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 81345200 A |
1 | /* |
| 2 | * Copyright (C) 2013, 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 | #include "config.h" | |
| 27 | #include "FTLJSCall.h" | |
| 28 | ||
| 29 | #if ENABLE(FTL_JIT) | |
| 30 | ||
| 31 | #include "DFGNode.h" | |
| 32 | #include "LinkBuffer.h" | |
| 33 | ||
| 34 | namespace JSC { namespace FTL { | |
| 35 | ||
| 36 | JSCall::JSCall() | |
| 37 | : m_stackmapID(UINT_MAX) | |
| 38 | , m_node(nullptr) | |
| 39 | , m_callLinkInfo(nullptr) | |
| 40 | , m_instructionOffset(UINT_MAX) | |
| 41 | { | |
| 42 | } | |
| 43 | ||
| 44 | JSCall::JSCall(unsigned stackmapID, DFG::Node* node) | |
| 45 | : m_stackmapID(stackmapID) | |
| 46 | , m_node(node) | |
| 47 | , m_callLinkInfo(nullptr) | |
| 48 | , m_instructionOffset(0) | |
| 49 | { | |
| 50 | } | |
| 51 | ||
| 52 | void JSCall::emit(CCallHelpers& jit) | |
| 53 | { | |
| 54 | m_callLinkInfo = jit.codeBlock()->addCallLinkInfo(); | |
| 55 | ||
| 56 | CCallHelpers::Jump slowPath = jit.branchPtrWithPatch( | |
| 57 | CCallHelpers::NotEqual, GPRInfo::regT0, m_targetToCheck, | |
| 58 | CCallHelpers::TrustedImmPtr(0)); | |
| 59 | ||
| 60 | jit.loadPtr( | |
| 61 | CCallHelpers::Address(GPRInfo::regT0, JSFunction::offsetOfScopeChain()), | |
| 62 | GPRInfo::regT1); | |
| 63 | jit.store64( | |
| 64 | GPRInfo::regT1, | |
| 65 | CCallHelpers::Address( | |
| 66 | CCallHelpers::stackPointerRegister, | |
| 67 | sizeof(Register) * (JSStack::ScopeChain - JSStack::CallerFrameAndPCSize))); | |
| 68 | ||
| 69 | m_fastCall = jit.nearCall(); | |
| 70 | CCallHelpers::Jump done = jit.jump(); | |
| 71 | ||
| 72 | slowPath.link(&jit); | |
| 73 | ||
| 74 | jit.move(CCallHelpers::TrustedImmPtr(m_callLinkInfo), GPRInfo::regT2); | |
| 75 | m_slowCall = jit.nearCall(); | |
| 76 | ||
| 77 | done.link(&jit); | |
| 78 | } | |
| 79 | ||
| 80 | void JSCall::link(VM& vm, LinkBuffer& linkBuffer) | |
| 81 | { | |
| 82 | ThunkGenerator generator = linkThunkGeneratorFor( | |
| 83 | m_node->op() == DFG::Construct ? CodeForConstruct : CodeForCall, | |
| 84 | MustPreserveRegisters); | |
| 85 | ||
| 86 | linkBuffer.link( | |
| 87 | m_slowCall, FunctionPtr(vm.getCTIStub(generator).code().executableAddress())); | |
| 88 | ||
| 89 | m_callLinkInfo->isFTL = true; | |
| 90 | m_callLinkInfo->callType = m_node->op() == DFG::Construct ? CallLinkInfo::Construct : CallLinkInfo::Call; | |
| 91 | m_callLinkInfo->codeOrigin = m_node->origin.semantic; | |
| 92 | m_callLinkInfo->callReturnLocation = linkBuffer.locationOfNearCall(m_slowCall); | |
| 93 | m_callLinkInfo->hotPathBegin = linkBuffer.locationOf(m_targetToCheck); | |
| 94 | m_callLinkInfo->hotPathOther = linkBuffer.locationOfNearCall(m_fastCall); | |
| 95 | m_callLinkInfo->calleeGPR = GPRInfo::regT0; | |
| 96 | } | |
| 97 | ||
| 98 | } } // namespace JSC::FTL | |
| 99 | ||
| 100 | #endif // ENABLE(FTL_JIT) | |
| 101 |