mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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85 lines
3.3 KiB
C++
85 lines
3.3 KiB
C++
/*
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* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ModuleNamespaceAccessCase.h"
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#if ENABLE(JIT)
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#include "CCallHelpers.h"
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#include "JSModuleEnvironment.h"
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#include "JSModuleNamespaceObject.h"
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#include "PolymorphicAccess.h"
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#include "StructureStubInfo.h"
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namespace JSC {
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ModuleNamespaceAccessCase::ModuleNamespaceAccessCase(VM& vm, JSCell* owner, CacheableIdentifier identifier, JSModuleNamespaceObject* moduleNamespaceObject, JSModuleEnvironment* moduleEnvironment, ScopeOffset scopeOffset)
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: Base(vm, owner, ModuleNamespaceLoad, identifier, invalidOffset, nullptr, ObjectPropertyConditionSet(), nullptr)
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, m_scopeOffset(scopeOffset)
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{
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m_moduleNamespaceObject.set(vm, owner, moduleNamespaceObject);
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m_moduleEnvironment.set(vm, owner, moduleEnvironment);
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}
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std::unique_ptr<AccessCase> ModuleNamespaceAccessCase::create(VM& vm, JSCell* owner, CacheableIdentifier identifier, JSModuleNamespaceObject* moduleNamespaceObject, JSModuleEnvironment* moduleEnvironment, ScopeOffset scopeOffset)
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{
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return std::unique_ptr<AccessCase>(new ModuleNamespaceAccessCase(vm, owner, identifier, moduleNamespaceObject, moduleEnvironment, scopeOffset));
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}
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ModuleNamespaceAccessCase::~ModuleNamespaceAccessCase()
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{
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}
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std::unique_ptr<AccessCase> ModuleNamespaceAccessCase::clone() const
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{
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std::unique_ptr<ModuleNamespaceAccessCase> result(new ModuleNamespaceAccessCase(*this));
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result->resetState();
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return result;
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}
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void ModuleNamespaceAccessCase::emit(AccessGenerationState& state, MacroAssembler::JumpList& fallThrough)
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{
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CCallHelpers& jit = *state.jit;
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JSValueRegs valueRegs = state.valueRegs;
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GPRReg baseGPR = state.baseGPR;
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fallThrough.append(
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jit.branchPtr(
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CCallHelpers::NotEqual,
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baseGPR,
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CCallHelpers::TrustedImmPtr(m_moduleNamespaceObject.get())));
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jit.loadValue(&m_moduleEnvironment->variableAt(m_scopeOffset), valueRegs);
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state.failAndIgnore.append(jit.branchIfEmpty(valueRegs));
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state.succeed();
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}
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} // namespace JSC
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#endif // ENABLE(JIT)
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