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