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/*
* Copyright (C) 2011-2017 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 "SparseArrayValueMap.h"
#include "ClassInfo.h"
#include "GetterSetter.h"
#include "JSObject.h"
#include "JSCInlines.h"
#include "PropertySlot.h"
#include "SlotVisitor.h"
#include "Structure.h"
#include "TypeError.h"
namespace JSC {
const ClassInfo SparseArrayValueMap::s_info = { "SparseArrayValueMap", 0, 0, CREATE_METHOD_TABLE(SparseArrayValueMap) };
SparseArrayValueMap::SparseArrayValueMap(VM& vm)
: Base(vm, vm.sparseArrayValueMapStructure.get())
, m_flags(Normal)
, m_reportedCapacity(0)
{
}
SparseArrayValueMap::~SparseArrayValueMap()
{
}
void SparseArrayValueMap::finishCreation(VM& vm)
{
Base::finishCreation(vm);
}
SparseArrayValueMap* SparseArrayValueMap::create(VM& vm)
{
SparseArrayValueMap* result = new (NotNull, allocateCell<SparseArrayValueMap>(vm.heap)) SparseArrayValueMap(vm);
result->finishCreation(vm);
return result;
}
void SparseArrayValueMap::destroy(JSCell* cell)
{
static_cast<SparseArrayValueMap*>(cell)->SparseArrayValueMap::~SparseArrayValueMap();
}
Structure* SparseArrayValueMap::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
SparseArrayValueMap::AddResult SparseArrayValueMap::add(JSObject* array, unsigned i)
{
AddResult result;
size_t capacity;
{
auto locker = holdLock(*this);
SparseArrayEntry entry;
entry.setWithoutWriteBarrier(jsUndefined());
result = m_map.add(i, entry);
capacity = m_map.capacity();
}
if (capacity > m_reportedCapacity) {
// FIXME: Adopt reportExtraMemoryVisited, and switch to reportExtraMemoryAllocated.
// https://bugs.webkit.org/show_bug.cgi?id=142595
Heap::heap(array)->deprecatedReportExtraMemory((capacity - m_reportedCapacity) * (sizeof(unsigned) + sizeof(WriteBarrier<Unknown>)));
m_reportedCapacity = capacity;
}
return result;
}
void SparseArrayValueMap::remove(iterator it)
{
auto locker = holdLock(*this);
m_map.remove(it);
}
void SparseArrayValueMap::remove(unsigned i)
{
auto locker = holdLock(*this);
m_map.remove(i);
}
bool SparseArrayValueMap::putEntry(ExecState* exec, JSObject* array, unsigned i, JSValue value, bool shouldThrow)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ASSERT(value);
AddResult result = add(array, i);
SparseArrayEntry& entry = result.iterator->value;
// To save a separate find & add, we first always add to the sparse map.
// In the uncommon case that this is a new property, and the array is not
// extensible, this is not the right thing to have done - so remove again.
if (result.isNewEntry && !array->isStructureExtensible()) {
remove(result.iterator);
return typeError(exec, scope, shouldThrow, ASCIILiteral(ReadonlyPropertyWriteError));
}
scope.release();
return entry.put(exec, array, this, value, shouldThrow);
}
bool SparseArrayValueMap::putDirect(ExecState* exec, JSObject* array, unsigned i, JSValue value, unsigned attributes, PutDirectIndexMode mode)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ASSERT(value);
bool shouldThrow = (mode == PutDirectIndexShouldThrow);
AddResult result = add(array, i);
SparseArrayEntry& entry = result.iterator->value;
// To save a separate find & add, we first always add to the sparse map.
// In the uncommon case that this is a new property, and the array is not
// extensible, this is not the right thing to have done - so remove again.
if (mode != PutDirectIndexLikePutDirect && result.isNewEntry && !array->isStructureExtensible()) {
remove(result.iterator);
return typeError(exec, scope, shouldThrow, ASCIILiteral(NonExtensibleObjectPropertyDefineError));
}
if (entry.attributes & ReadOnly)
return typeError(exec, scope, shouldThrow, ASCIILiteral(ReadonlyPropertyWriteError));
entry.attributes = attributes;
entry.set(vm, this, value);
return true;
}
void SparseArrayEntry::get(JSObject* thisObject, PropertySlot& slot) const
{
JSValue value = Base::get();
ASSERT(value);
if (LIKELY(!value.isGetterSetter())) {
slot.setValue(thisObject, attributes, value);
return;
}
slot.setGetterSlot(thisObject, attributes, jsCast<GetterSetter*>(value));
}
void SparseArrayEntry::get(PropertyDescriptor& descriptor) const
{
descriptor.setDescriptor(Base::get(), attributes);
}
bool SparseArrayEntry::put(ExecState* exec, JSValue thisValue, SparseArrayValueMap* map, JSValue value, bool shouldThrow)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!(attributes & Accessor)) {
if (attributes & ReadOnly)
return typeError(exec, scope, shouldThrow, ASCIILiteral(ReadonlyPropertyWriteError));
set(vm, map, value);
return true;
}
scope.release();
return callSetter(exec, thisValue, Base::get(), value, shouldThrow ? StrictMode : NotStrictMode);
}
JSValue SparseArrayEntry::getNonSparseMode() const
{
ASSERT(!attributes);
return Base::get();
}
void SparseArrayValueMap::visitChildren(JSCell* thisObject, SlotVisitor& visitor)
{
Base::visitChildren(thisObject, visitor);
SparseArrayValueMap* thisMap = jsCast<SparseArrayValueMap*>(thisObject);
auto locker = holdLock(*thisMap);
iterator end = thisMap->m_map.end();
for (iterator it = thisMap->m_map.begin(); it != end; ++it)
visitor.append(it->value);
}
} // namespace JSC
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