Debugger: Cleanup.

TargetHostInterface:
- Adjust _StartTeamDebugger to always require a user interface object to
  be passed in rather than implicitly falling back to GUI if unspecified.

Debugger:
- Refactor to be in compliance with the above.

src/apps/debugger/Debugger.cpp

@@ -418,10 +418,17 @@ Debugger::MessageReceived(BMessage* message)
 			options.requestType = TEAM_DEBUGGER_REQUEST_ATTACH;
 			options.settingsManager = &fSettingsManager;
 			options.team = teamID;
+			options.userInterface = new(std::nothrow) GraphicalUserInterface;
+			if (options.userInterface == NULL) {
+				// TODO: notify user.
+				break;
+			}
+			BReference<UserInterface> uiReference(options.userInterface, true);
 			status_t error = interface->StartTeamDebugger(options);
 			if (error != B_OK) {
 				// TODO: notify user.
-			}
+			} else
+				uiReference.Detach();
 			break;
 		}
 		case MSG_START_NEW_TEAM:
@@ -576,6 +583,10 @@ Debugger::_StartNewTeam(TargetHostInterface* interface, const char* path,
 	TeamDebuggerOptions options;
 	options.requestType = TEAM_DEBUGGER_REQUEST_CREATE;
 	options.settingsManager = &fSettingsManager;
+	options.userInterface = new(std::nothrow) GraphicalUserInterface;
+	if (options.userInterface == NULL)
+		return B_NO_MEMORY;
+	BReference<UserInterface> uiReference(options.userInterface, true);
 	options.commandLineArgc = argVector.ArgumentCount();
 	if (options.commandLineArgc <= 0)
 		return B_BAD_VALUE;
@@ -586,8 +597,10 @@ Debugger::_StartNewTeam(TargetHostInterface* interface, const char* path,
 	MemoryDeleter deleter(argv);
 
 	status_t error = interface->StartTeamDebugger(options);
-	if (error == B_OK)
+	if (error == B_OK) {
 		deleter.Detach();
+		uiReference.Detach();
+	}
 
 	return error;
 }
@@ -599,10 +612,17 @@ Debugger::_HandleOptions(const Options& options)
 	TeamDebuggerOptions debuggerOptions;
 	set_debugger_options_from_options(debuggerOptions, options);
 	debuggerOptions.settingsManager = &fSettingsManager;
-
+	debuggerOptions.userInterface = new(std::nothrow) GraphicalUserInterface;
+	if (debuggerOptions.userInterface == NULL)
+		return B_NO_MEMORY;
+	BReference<UserInterface> uiReference(debuggerOptions.userInterface, true);
 	TargetHostInterface* hostInterface
 		= TargetHostInterfaceRoster::Default()->ActiveInterfaceAt(0);
-	return hostInterface->StartTeamDebugger(debuggerOptions);
+	status_t error = hostInterface->StartTeamDebugger(debuggerOptions);
+	if (error == B_OK)
+		uiReference.Detach();
+
+	return error;
 }
 
 

src/apps/debugger/target_host_interface/TargetHostInterface.cpp

@@ -10,7 +10,6 @@
 #include <AutoLocker.h>
 
 #include "DebuggerInterface.h"
-#include "GraphicalUserInterface.h"
 #include "MessageCodes.h"
 #include "TeamDebugger.h"
 
@@ -238,16 +237,11 @@ status_t
 TargetHostInterface::_StartTeamDebugger(team_id teamID,
 	const TeamDebuggerOptions& options, bool stopInMain)
 {
-	BReference<UserInterface> userInterfaceReference;
 	UserInterface* userInterface = options.userInterface;
 	if (userInterface == NULL) {
-		userInterface = new(std::nothrow) GraphicalUserInterface;
+		fprintf(stderr, "Error: Requested team debugger start without "
-		if (userInterface == NULL) {
+			"valid user interface!\n");
-			fprintf(stderr, "Error: Out of memory!\n");
+		return B_BAD_VALUE;
-			return B_NO_MEMORY;
-		}
-
-		userInterfaceReference.SetTo(userInterface, true);
 	}
 
 	thread_id threadID = options.thread;
@@ -273,7 +267,6 @@ TargetHostInterface::_StartTeamDebugger(team_id teamID,
 		}
 	}
 
-
 	BReference<DebuggerInterface> debuggerInterfaceReference(interface,
 		true);
 	debugger = new(std::nothrow) TeamDebugger(this, userInterface,