internal override bool Scan(NonNullReferenceVisitor visitor)
{
bool globalRepeat = false;
while (true)
{
UIntPtr lowAddr, highAddr;
if (this.destinationLow != this.allocator.AllocPtr)
{
lowAddr = this.destinationLow;
highAddr = this.allocator.AllocPtr;
this.destinationLow = highAddr;
}
else if (!this.HaveWork)
{
// No more work to do
break;
}
else
{
lowAddr = this.GetWork(out highAddr);
}
globalRepeat = true;
this.sourceHigh = highAddr;
lowAddr += PreHeader.Size;
lowAddr =
BumpAllocator.SkipNonObjectData(lowAddr, highAddr);
while (lowAddr < this.sourceHigh)
{
Object obj = Magic.fromAddress(lowAddr);
lowAddr += visitor.VisitReferenceFields(obj);
lowAddr =
BumpAllocator.SkipNonObjectData(lowAddr, highAddr);
}
if (lowAddr < highAddr)
{
// The scanning must have been aborted early due to
// overflow into a new page. Put the rest of the
// range on the work list.
this.AddWork(lowAddr - PreHeader.Size, highAddr);
}
}
return(globalRepeat);
}
internal override bool Scan(NonNullReferenceVisitor visitor)
{
bool localRepeat = false;
bool globalRepeat = false;
while (true)
{
while (this.HaveWork)
{
localRepeat = true;
UIntPtr lowAddr, highAddr;
lowAddr = this.GetWork(out highAddr);
lowAddr += PreHeader.Size;
lowAddr =
BumpAllocator.SkipNonObjectData(lowAddr, highAddr);
while (lowAddr < highAddr)
{
Object obj = Magic.fromAddress(lowAddr);
lowAddr += visitor.VisitReferenceFields(obj);
lowAddr =
BumpAllocator.SkipNonObjectData(lowAddr, highAddr);
}
}
if (this.destinationLow != this.allocator.AllocPtr)
{
localRepeat = true;
UIntPtr lowAddr = this.destinationLow;
UIntPtr highAddr = this.allocator.AllocPtr;
this.destinationLow = highAddr;
this.AddWork(lowAddr, highAddr);
}
if (!localRepeat)
{
// Exit the loop if we have done nothing this time around
break;
}
globalRepeat = true;
localRepeat = false;
}
return(globalRepeat);
}
void VisitObjects(ObjectLayout.ObjectVisitor objectVisitor,
UIntPtr lowAddr, UIntPtr highAddr)
{
UIntPtr oldAddr = UIntPtr.Zero;
UIntPtr objectAddr = lowAddr + PreHeader.Size;
objectAddr = BumpAllocator.SkipNonObjectData(objectAddr, highAddr);
while (objectAddr < highAddr)
{
if (PageTable.Page(objectAddr) != PageTable.Page(oldAddr))
{
InteriorPtrTable.VerifyFirst(oldAddr, objectAddr);
}
oldAddr = objectAddr;
Object obj = Magic.fromAddress(objectAddr);
UIntPtr objectSize = objectVisitor.Visit(obj);
objectAddr += objectSize;
objectAddr =
BumpAllocator.SkipNonObjectData(objectAddr, highAddr);
}
VTable.Assert(objectAddr - PreHeader.Size <= highAddr);
}
internal static UIntPtr PtrToNextObject(UIntPtr objPtr, UIntPtr size, UIntPtr limit)
{
return(BumpAllocator.SkipNonObjectData(objPtr + size, limit));
}