Use other thread for evaluation if the current one is not suitable

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5301 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Debugger/Debugger.Core/Eval.cs

@@ -91,8 +91,8 @@ namespace Debugger
 			this.process = appDomain.Process;
 			this.description = description;
 			this.state = EvalState.Evaluating;
-			
+			this.thread = GetEvaluationThread(appDomain);
-			this.corEval = CreateCorEval(appDomain, out this.thread);
+			this.corEval = thread.CorThread.CreateEval();
 			
 			try {
 				evalStarter(this);
@@ -133,35 +133,22 @@ namespace Debugger
 			}
 		}
 		
-	    static ICorDebugEval CreateCorEval(AppDomain appDomain, out Thread thread)
+		static Thread GetEvaluationThread(AppDomain appDomain)
 		{
 			appDomain.Process.AssertPaused();
 			
-			thread = appDomain.Process.SelectedThread;
+			Thread st = appDomain.Process.SelectedThread;
+			if (st != null && !st.Suspended && !st.IsInNativeCode && st.IsAtSafePoint && st.CorThread.GetAppDomain().GetID() == appDomain.ID) {
+				return st;
+			}
 			
-			if (thread.CorThread.GetAppDomain().GetID() != appDomain.ID) {
 			foreach(Thread t in appDomain.Process.Threads) {
-					if (t.CorThread.GetAppDomain().GetID() == appDomain.ID &&
+				if (!t.Suspended && !t.IsInNativeCode && t.IsAtSafePoint && t.CorThread.GetAppDomain().GetID() == appDomain.ID) {
-					    !t.Suspended &&
+					return t;
-					    !t.IsInNativeCode &&
-					    t.IsAtSafePoint)
-					{
-						thread = t;
-						break;
 				}
 			}
-			}
-			
-			if (thread == null)
-				throw new GetValueException("Can not evaluate because no thread is selected");
-			if (thread.IsInNativeCode)
-				throw new GetValueException("Can not evaluate because native frame is on top of stack");
-			if (!thread.IsAtSafePoint)
-				throw new GetValueException("Can not evaluate because thread is not at a safe point");
-			if (thread.Suspended)
-				throw new GetValueException("Can not evaluate on suspended thread");
 			
-			return thread.CorThread.CreateEval();
+			throw new GetValueException("No suitable thread for evaluation");
 		}
 
 		internal bool IsCorEval(ICorDebugEval corEval)
@@ -293,8 +280,8 @@ namespace Debugger
 	    {
 	    	if (value == null) {
 				ICorDebugClass corClass = appDomain.ObjectType.CorType.GetClass();
-				Thread thread;
+				Thread thread = GetEvaluationThread(appDomain);
-				ICorDebugEval corEval = CreateCorEval(appDomain, out thread);
+				ICorDebugEval corEval = thread.CorThread.CreateEval();
 				ICorDebugValue corValue = corEval.CreateValue((uint)CorElementType.CLASS, corClass);
 				return new Value(appDomain, corValue);
 			} else if (value is string) {

src/AddIns/Debugger/Debugger.Core/Process.cs

@@ -416,12 +416,12 @@ namespace Debugger
 		
 		internal Thread[] UnsuspendedThreads {
 			get {
-				List<Thread> threadsToRun = new List<Thread>(this.Threads.Count);
+				List<Thread> unsuspendedThreads = new List<Thread>(this.Threads.Count);
 				foreach(Thread t in this.Threads) {
 					if (!t.Suspended)
-						threadsToRun.Add(t);
+						unsuspendedThreads.Add(t);
 				}
-				return threadsToRun.ToArray();
+				return unsuspendedThreads.ToArray();
 			}
 		}
 		
@@ -435,17 +435,18 @@ namespace Debugger
 		
 		internal CorDebugThreadState NewThreadState = CorDebugThreadState.THREAD_RUN;
 		
+		/// <param name="threadsToRun"> Null to keep current setting </param>
+		/// <param name="newThreadState"> What happens to created threads.  Null to keep current setting </param>
 		internal void AsyncContinue(DebuggeeStateAction action, Thread[] threadsToRun, CorDebugThreadState? newThreadState)
 		{
 			AssertPaused();
 			
 			if (threadsToRun != null) {
 //				corProcess.SetAllThreadsDebugState(CorDebugThreadState.THREAD_SUSPEND, null);
-//				TODO: There is second unreported thread, stopping it prevents the debugee from exiting
+//				Note: There is unreported thread, stopping it prevents the debugee from exiting
-//				uint count = corProcess.EnumerateThreads().GetCount();
+//				      It is not corProcess.GetHelperThreadID
-//				ICorDebugThread[] ts = new ICorDebugThread[count];
+//				ICorDebugThread[] ts = new ICorDebugThread[corProcess.EnumerateThreads().GetCount()];
 //				corProcess.EnumerateThreads().Next((uint)ts.Length, ts);
-//				uint helper = corProcess.GetHelperThreadID();
 				try {
 					foreach(Thread t in this.Threads) {
 						t.CorThread.SetDebugState(CorDebugThreadState.THREAD_SUSPEND);