/// <summary>
/// Allocate a string, the string will be put in string table.
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private StackValue AllocateStringInternal(string str, bool isConstant)
{
int index;
if (!stringTable.TryGetPointer(str, out index))
{
index = AllocateInternal(new StackValue[] {}, PrimitiveType.kTypeString);
stringTable.AddString(index, str);
}
if (isConstant)
fixedHeapElements.Add(index);
var svString = StackValue.BuildString(index);
DSString dsstring = ToHeapObject<DSString>(svString);
dsstring.SetPointer(svString);
return svString;
}
/// <summary>
/// Allocate a string, the string will be put in string table.
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private StackValue AllocateStringInternal(string str, bool isConstant)
{
int index;
if (stringTable.TryGetPointer(str, out index))
{
// Any existing heap elements, marked as white, that are in the sweepSet and that are referenced during the sweep cycle will be marked as Black.
// This will ensure that no reachable data is mistakenly cleaned up.
bool isDuringGCCriticalAsyncCycle = gcState != GCState.Pause;// Between the time the GC takes a snapshot of the stack and heap untill GC cycle is over.
bool isValidHeapIndex = index >= 0 && index < heapElements.Count;
if (isDuringGCCriticalAsyncCycle && isValidHeapIndex)
{
var he = heapElements[index];
Validity.Assert(he != null, "Heap element found at index {0} cannot be null", index);
// If heap element is marked as white then it is either not processed by Propagate step yet or processed and found as garbage.
// If the sweepSet does not contain the heap element's index then there is no need to mark it black (since cleanup will not even be tried)
if (he.Mark == GCMark.White && sweepSet.Contains(index))
{
// Set the heap element's Mark as Black so that it will not get cleaned up.
// No need to do a recursive mark on the it since it is just a string and thus cannot have references to other heap elements.
he.Mark = GCMark.Black;
}
}
}
else
{
index = AllocateInternal(new StackValue[] {}, PrimitiveType.String);
stringTable.AddString(index, str);
}
if (isConstant)
{
fixedHeapElements.Add(index);
}
var svString = StackValue.BuildString(index);
DSString dsstring = ToHeapObject <DSString>(svString);
dsstring.SetPointer(svString);
return(svString);
}
