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/*
* Copyright (C) 2013-2018 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.
*/
#pragma once
#include "FunctionExecutable.h"
#include "JSBoundFunction.h"
#include "JSFunction.h"
#include "NativeExecutable.h"
namespace JSC {
inline JSFunction* JSFunction::createWithInvalidatedReallocationWatchpoint(
VM& vm, FunctionExecutable* executable, JSScope* scope)
{
ASSERT(executable->singleton().hasBeenInvalidated());
return createImpl(vm, executable, scope, selectStructureForNewFuncExp(scope->globalObject(vm), executable));
}
inline JSFunction::JSFunction(VM& vm, FunctionExecutable* executable, JSScope* scope, Structure* structure)
: Base(vm, scope, structure)
, m_executableOrRareData(bitwise_cast<uintptr_t>(executable))
{
assertTypeInfoFlagInvariants();
}
inline FunctionExecutable* JSFunction::jsExecutable() const
{
ASSERT(!isHostFunctionNonInline());
return static_cast<FunctionExecutable*>(executable());
}
inline bool JSFunction::isHostFunction() const
{
ASSERT(executable());
return executable()->isHostFunction();
}
inline Intrinsic JSFunction::intrinsic() const
{
return executable()->intrinsic();
}
inline bool JSFunction::isBuiltinFunction() const
{
return !isHostFunction() && jsExecutable()->isBuiltinFunction();
}
inline bool JSFunction::isHostOrBuiltinFunction() const
{
return isHostFunction() || isBuiltinFunction();
}
inline bool JSFunction::isClassConstructorFunction() const
{
return !isHostFunction() && jsExecutable()->isClassConstructorFunction();
}
inline TaggedNativeFunction JSFunction::nativeFunction()
{
ASSERT(isHostFunctionNonInline());
return static_cast<NativeExecutable*>(executable())->function();
}
inline TaggedNativeFunction JSFunction::nativeConstructor()
{
ASSERT(isHostFunctionNonInline());
return static_cast<NativeExecutable*>(executable())->constructor();
}
inline bool isHostFunction(JSValue value, TaggedNativeFunction nativeFunction)
{
JSFunction* function = jsCast<JSFunction*>(getJSFunction(value));
if (!function || !function->isHostFunction())
return false;
return function->nativeFunction() == nativeFunction;
}
inline bool JSFunction::hasReifiedLength() const
{
if (FunctionRareData* rareData = this->rareData())
return rareData->hasReifiedLength();
return false;
}
inline bool JSFunction::hasReifiedName() const
{
if (FunctionRareData* rareData = this->rareData())
return rareData->hasReifiedName();
return false;
}
inline bool JSFunction::canAssumeNameAndLengthAreOriginal(VM&)
{
if (isHostFunction())
return false;
FunctionRareData* rareData = this->rareData();
if (!rareData)
return true;
if (rareData->hasModifiedNameForNonHostFunction())
return false;
if (rareData->hasModifiedLengthForNonHostFunction())
return false;
return true;
}
inline bool JSFunction::canUseAllocationProfile()
{
if (isHostOrBuiltinFunction()) {
if (isHostFunction())
return false;
VM& vm = globalObject()->vm();
unsigned attributes;
JSValue prototype = getDirect(vm, vm.propertyNames->prototype, attributes);
if (!prototype || (attributes & PropertyAttribute::AccessorOrCustomAccessorOrValue))
return false;
}
// If we don't have a prototype property, we're not guaranteed it's
// non-configurable. For example, user code can define the prototype
// as a getter. JS semantics require that the getter is called every
// time |construct| occurs with this function as new.target.
return jsExecutable()->hasPrototypeProperty();
}
inline FunctionRareData* JSFunction::ensureRareDataAndAllocationProfile(JSGlobalObject* globalObject, unsigned inlineCapacity)
{
ASSERT(canUseAllocationProfile());
FunctionRareData* rareData = this->rareData();
if (!rareData)
return allocateAndInitializeRareData(globalObject, inlineCapacity);
if (UNLIKELY(!rareData->isObjectAllocationProfileInitialized()))
return initializeRareData(globalObject, inlineCapacity);
return rareData;
}
inline JSString* JSFunction::asStringConcurrently(VM& vm) const
{
if (inherits<JSBoundFunction>(vm))
return nullptr;
if (isHostFunction())
return static_cast<NativeExecutable*>(executable())->asStringConcurrently();
return jsExecutable()->asStringConcurrently();
}
} // namespace JSC
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