private static unsafe void ResetThread(uint threadID)
{
var thread = Threads[threadID];
UninterruptableMonitor.Enter(thread);
try
{
if (thread.Status != ThreadStatus.Terminated)
{
return;
}
if (thread.Process != null)
{
var proc = thread.Process;
UninterruptableMonitor.Enter(proc.Threads);
try
{
for (var i = 0; i < proc.Threads.Count; i++)
{
if (proc.Threads[i] == thread)
{
proc.Threads.RemoveAt(i);
break;
}
}
}
finally
{
UninterruptableMonitor.Exit(proc.Threads);
}
}
if (KConfig.Log.Threads >= KLogLevel.Debug)
{
KernelMessage.WriteLine("Disposing Thread {1} DebugName={0}", thread.DebugName, thread.ThreadID);
}
thread.FreeMemory();
ThreadsAllocated--;
thread.Status = ThreadStatus.Empty;
}
finally
{
UninterruptableMonitor.Exit(thread);
}
}
public static void ResetTerminatedThreads()
{
UninterruptableMonitor.Enter(Threads);
try
{
for (uint i = 0; i < ThreadCapacity; i++)
{
if (Threads[i].Status == ThreadStatus.Terminated)
{
ResetThread(i);
}
}
}
finally
{
UninterruptableMonitor.Exit(Threads);
}
}
public static unsafe Thread CreateThread(Process proc, ThreadStartOptions options)
{
Thread thread;
uint threadID;
lock (SyncRoot)
{
threadID = FindEmptyThreadSlot();
if (threadID == 0)
{
ResetTerminatedThreads();
threadID = FindEmptyThreadSlot();
Assert.False(threadID == 0 && Enabled, "No more free Thread-Slots!");
}
thread = Threads[threadID];
thread.Status = ThreadStatus.Creating;
}
// Debug:
//options.User = false;
thread.User = proc.User;
thread.Debug = options.Debug;
thread.DebugName = options.DebugName;
thread.Priority = options.Priority;
var stackSize = options.StackSize;
var argBufSize = options.ArgumentBufferSize;
thread.ArgumentBufferSize = options.ArgumentBufferSize;
var stackPages = KMath.DivCeil(stackSize, PhysicalPageManager.PageSize);
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
KernelMessage.WriteLine("Requesting {0} stack pages", stackPages);
}
var debugPadding = 8u;
stackSize = stackPages * PhysicalPageManager.PageSize;
var stack = new Pointer((void *)VirtualPageManager.AllocatePages(stackPages, new AllocatePageOptions {
DebugName = "ThreadStack"
}));
PageTable.KernelTable.SetWritable((uint)stack, stackSize);
if (thread.User && proc.PageTable != PageTable.KernelTable)
{
proc.PageTable.MapCopy(PageTable.KernelTable, (uint)stack, stackSize);
}
stackSize -= debugPadding;
var stackBottom = stack + (int)stackSize;
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
KernelMessage.Write("Create Thread {0}. EntryPoint: {1:X8} Stack: {2:X8}-{3:X8} Type: ", threadID, options.MethodAddr, (uint)stack, (uint)stackBottom - 1);
}
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
if (thread.User)
{
KernelMessage.Write("User");
}
else
{
KernelMessage.Write("Kernel");
}
}
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
if (thread.DebugName != null)
{
KernelMessage.Write(" Thread DebugName: {0}", thread.DebugName);
}
if (thread.Process != null)
{
KernelMessage.WriteLine(" Process: {0}", thread.Process.Path);
}
}
// -- kernel stack
thread.KernelStackSize = 4 * 4096;
//thhread.tssAddr = RawVirtualFrameAllocator.RequestRawVirtalMemoryPages(1);
PageTable.KernelTable.SetWritable(KernelStart.TssAddr, 4096);
thread.KernelStack = VirtualPageManager.AllocatePages(
KMath.DivCeil(thread.KernelStackSize, 4096),
new AllocatePageOptions {
DebugName = "ThreadKernelStack"
}); // TODO: Decrease Kernel Stack, because Stack have to be changed directly because of multi-threading.
thread.KernelStackBottom = thread.KernelStack + thread.KernelStackSize;
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
KernelMessage.WriteLine("tssEntry: {0:X8}, tssKernelStack: {1:X8}-{2:X8}", KernelStart.TssAddr, thread.KernelStack, thread.KernelStackBottom - 1);
}
PageTable.KernelTable.SetWritable(thread.KernelStack, 256 * 4096);
// ---
uint stackStateOffset = 8;
stackStateOffset += argBufSize;
uint cS = 0x08;
if (thread.User)
{
cS = 0x1B;
}
var stateSize = thread.User ? IDTTaskStack.Size : IDTStack.Size;
thread.StackTop = (uint)stack;
thread.StackBottom = (uint)stackBottom;
Intrinsic.Store32(stackBottom, 4, 0xFF00001); // Debug Marker
Intrinsic.Store32(stackBottom, 0, 0xFF00002); // Debug Marker
Intrinsic.Store32(stackBottom, -4, (uint)stackBottom);
Intrinsic.Store32(stackBottom, -(8 + (int)argBufSize), SignalThreadTerminationMethodAddress.ToInt32()); // Address of method that will raise a interrupt signal to terminate thread
uint argAddr = (uint)stackBottom - argBufSize;
IDTTaskStack *stackState = null;
if (thread.User)
{
stackState = (IDTTaskStack *)VirtualPageManager.AllocatePages(1, new AllocatePageOptions {
DebugName = "ThreadStackState"
});
if (proc.PageTable != PageTable.KernelTable)
{
proc.PageTable.MapCopy(PageTable.KernelTable, (uint)stackState, IDTTaskStack.Size);
}
}
else
{
stackState = (IDTTaskStack *)(stackBottom - 8 - IDTStack.Size); // IDTStackSize is correct - we don't need the Task-Members.
}
thread.StackState = stackState;
if (thread.User && KConfig.Log.Threads >= KLogLevel.Trace)
{
KernelMessage.WriteLine("StackState at {0:X8}", (uint)stackState);
}
stackState->Stack.EFLAGS = X86_EFlags.Reserved1;
if (thread.User)
{
// Never set this values for Non-User, otherwise you will override stack informations.
stackState->TASK_SS = 0x23;
stackState->TASK_ESP = (uint)stackBottom - (uint)stackStateOffset;
proc.PageTable.MapCopy(PageTable.KernelTable, thread.KernelStack, thread.KernelStackSize);
proc.PageTable.MapCopy(PageTable.KernelTable, KernelStart.TssAddr, 4096);
}
if (thread.User && options.AllowUserModeIOPort)
{
byte IOPL = 3;
stackState->Stack.EFLAGS = (X86_EFlags)((uint)stackState->Stack.EFLAGS).SetBits(12, 2, IOPL);
}
stackState->Stack.CS = cS;
stackState->Stack.EIP = options.MethodAddr;
stackState->Stack.EBP = (uint)(stackBottom - (int)stackStateOffset).ToInt32();
thread.DataSelector = thread.User ? 0x23u : 0x10u;
UninterruptableMonitor.Enter(proc.Threads);
try
{
thread.Process = proc;
proc.Threads.Add(thread);
}
finally
{
UninterruptableMonitor.Exit(proc.Threads);
}
ThreadsAllocated++;
if (ThreadsAllocated > ThreadsMaxAllocated)
{
ThreadsMaxAllocated = ThreadsAllocated;
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
KernelMessage.WriteLine("Threads Max Allocated: {0}. Allocated {0} Active: {1}", ThreadsMaxAllocated, ThreadsAllocated, GetActiveThreadCount());
}
if (KConfig.Log.Threads >= KLogLevel.Trace)
{
DumpStats();
}
}
else if (KConfig.Log.Threads >= KLogLevel.Debug)
{
KernelMessage.WriteLine("Threads Allocated {0} Active: {1}", ThreadsAllocated, GetActiveThreadCount());
}
return(thread);
}