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/*
* 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)