GeneratorFrame.cpp [plain text]
#include "config.h"
#include "GeneratorFrame.h"
#include "CodeBlock.h"
#include "HeapIterationScope.h"
#include "JSCJSValueInlines.h"
#include "JSCellInlines.h"
#include "SlotVisitorInlines.h"
#include "StructureInlines.h"
namespace JSC {
const ClassInfo GeneratorFrame::s_info = { "GeneratorFrame", nullptr, nullptr, CREATE_METHOD_TABLE(GeneratorFrame) };
GeneratorFrame::GeneratorFrame(VM& vm, size_t numberOfCalleeLocals)
: Base(vm, vm.generatorFrameStructure.get())
, m_numberOfCalleeLocals(numberOfCalleeLocals)
{
}
void GeneratorFrame::finishCreation(VM& vm)
{
Base::finishCreation(vm);
for (size_t i = 0; i < m_numberOfCalleeLocals; ++i)
localAt(i).clear();
}
Structure* GeneratorFrame::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
GeneratorFrame* GeneratorFrame::create(VM& vm, size_t numberOfLocals)
{
GeneratorFrame* result =
new (
NotNull,
allocateCell<GeneratorFrame>(vm.heap, allocationSizeForLocals(numberOfLocals)))
GeneratorFrame(vm, numberOfLocals);
result->finishCreation(vm);
return result;
}
void GeneratorFrame::save(ExecState* exec, const FastBitVector& liveCalleeLocals)
{
ASSERT(liveCalleeLocals.numBits() <= m_numberOfCalleeLocals);
liveCalleeLocals.forEachSetBit([&](size_t index) {
localAt(index).set(exec->vm(), this, exec->uncheckedR(virtualRegisterForLocal(index)).jsValue());
});
}
void GeneratorFrame::resume(ExecState* exec, const FastBitVector& liveCalleeLocals)
{
liveCalleeLocals.forEachSetBit([&](size_t index) {
exec->uncheckedR(virtualRegisterForLocal(index)) = localAt(index).get();
localAt(index).clear();
});
}
void GeneratorFrame::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
GeneratorFrame* thisObject = jsCast<GeneratorFrame*>(cell);
Base::visitChildren(thisObject, visitor);
visitor.appendValues(thisObject->locals(), thisObject->m_numberOfCalleeLocals);
}
}