Add UI hooks for watchpoints.

This gets basic watchpoint support working. Right clicking on a variable
and picking Watch now opens a prompt with the inferred address, size
and watch type for the user to adjust.

Still needs some work to get them to show/be modifiable in the breakpoints
tab and to get them to respect architectural restrictions (i.e. on x86 we
can realistically only do 2 hardware watchpoints and those are restricted
to write watch), at least until we support software emulated watchpoints.

src/apps/debugger/Jamfile

@@ -211,6 +211,7 @@ Application Debugger :
 	TeamWindow.cpp
 	ThreadListView.cpp
 	VariablesView.cpp
+	WatchPromptWindow.cpp
 
 	# user_interface/gui/util
 	ActionMenuItem.cpp

src/apps/debugger/MessageCodes.h

@@ -53,7 +53,8 @@ enum {
 	MSG_INSPECTOR_WINDOW_CLOSED					= 'irwc',
 	MSG_INSPECT_ADDRESS							= 'isad',
 	MSG_SHOW_TYPECAST_NODE_PROMPT				= 'stnp',
-	MSG_TYPECAST_NODE							= 'tyno'
+	MSG_TYPECAST_NODE							= 'tyno',
+	MSG_SHOW_WATCH_VARIABLE_PROMPT				= 'swvp'
 };
 
 

src/apps/debugger/user_interface/gui/team_window/TeamWindow.cpp

@@ -44,6 +44,7 @@
 #include "TypeComponentPath.h"
 #include "UserInterface.h"
 #include "Variable.h"
+#include "WatchPromptWindow.h"
 
 
 enum {
@@ -247,6 +248,27 @@ TeamWindow::MessageReceived(BMessage* message)
 			break;
 
 		}
+		case MSG_SHOW_WATCH_VARIABLE_PROMPT:
+		{
+			target_addr_t address;
+			uint32 type;
+			int32 length;
+
+			if (message->FindUInt64("address", &address) != B_OK
+				|| message->FindUInt32("type", &type) != B_OK
+				|| message->FindInt32("length", &length) != B_OK) {
+				break;
+			}
+
+			try {
+				WatchPromptWindow* window = WatchPromptWindow::Create(address,
+					type, length, fListener);
+				window->Show();
+			} catch (...) {
+				// TODO: notify user
+			}
+			break;
+		}
 		case B_REFS_RECEIVED:
 		{
 			entry_ref locatedPath;

src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp

@@ -11,6 +11,8 @@
 
 #include <new>
 
+#include <debugger.h>
+
 #include <Looper.h>
 #include <PopUpMenu.h>
 #include <ToolTip.h>
@@ -1684,6 +1686,22 @@ VariablesView::MessageReceived(BMessage* message)
 			node->NodeChild()->SetNode(valueNode);
 			break;
 		}
+		case MSG_SHOW_WATCH_VARIABLE_PROMPT:
+		{
+			ModelNode* node = reinterpret_cast<ModelNode*>(
+				fVariableTable->SelectionModel()->NodeAt(0));
+			ValueLocation* location = node->NodeChild()->Location();
+			ValuePieceLocation piece = location->PieceAt(0);
+			if (piece.type != VALUE_PIECE_LOCATION_MEMORY)
+				break;
+
+			BMessage looperMessage(*message);
+			looperMessage.AddUInt64("address", piece.address);
+			looperMessage.AddInt32("length", piece.size);
+			looperMessage.AddUInt32("type", B_DATA_READ_WRITE_WATCHPOINT);
+			Looper()->PostMessage(&looperMessage);
+			break;
+		}
 		case MSG_VALUE_NODE_CHANGED:
 		{
 			ValueNodeChild* nodeChild;
@@ -1977,34 +1995,45 @@ VariablesView::_GetContextActionsForNode(ModelNode* node,
 	if (location->PieceAt(0).type != VALUE_PIECE_LOCATION_MEMORY)
 		return B_OK;
 
-	BMessage* message = new BMessage(MSG_SHOW_INSPECTOR_WINDOW);
-	if (message == NULL)
-		return B_NO_MEMORY;
+	BMessage* message = NULL;
+	status_t result = _AddContextAction("Inspect", MSG_SHOW_INSPECTOR_WINDOW,
+		actions, message);
+	if (result != B_OK)
+		return result;
 
-	ObjectDeleter<BMessage> messageDeleter(message);
 	message->AddUInt64("address", location->PieceAt(0).address);
 
-	ActionMenuItem* item = new(std::nothrow) ActionMenuItem("Inspect",
-		message);
+	result = _AddContextAction("Cast as" B_UTF8_ELLIPSIS,
+		MSG_SHOW_TYPECAST_NODE_PROMPT, actions, message);
+	if (result != B_OK)
+		return result;
+
+	result = _AddContextAction("Watch" B_UTF8_ELLIPSIS,
+		MSG_SHOW_WATCH_VARIABLE_PROMPT, actions, message);
+	if (result != B_OK)
+		return result;
+
+	return B_OK;
+}
+
+
+status_t
+VariablesView::_AddContextAction(const char* action, uint32 what,
+	ContextActionList* actions, BMessage*& _message)
+{
+	_message = new BMessage(what);
+	if (_message == NULL)
+		return B_NO_MEMORY;
+
+	ObjectDeleter<BMessage> messageDeleter(_message);
+
+	ActionMenuItem* item = new(std::nothrow) ActionMenuItem(action,
+		_message);
 	if (item == NULL)
 		return B_NO_MEMORY;
 
 	messageDeleter.Detach();
 	ObjectDeleter<ActionMenuItem> actionDeleter(item);
-	if (!actions->AddItem(item))
-		return B_NO_MEMORY;
-
-	message = new(std::nothrow)BMessage(MSG_SHOW_TYPECAST_NODE_PROMPT);
-	if (message == NULL)
-		return B_NO_MEMORY;
-
-	item = new(std::nothrow) ActionMenuItem("Cast as" B_UTF8_ELLIPSIS,
-		message);
-	if (item == NULL)
-		return B_NO_MEMORY;
-
-	messageDeleter.Detach();
-
 	if (!actions->AddItem(item))
 		return B_NO_MEMORY;
 

src/apps/debugger/user_interface/gui/team_window/VariablesView.h

@@ -72,6 +72,9 @@ private:
 			void				_RequestNodeValue(ModelNode* node);
 			status_t			_GetContextActionsForNode(ModelNode* node,
 									ContextActionList* actions);
+			status_t			_AddContextAction(const char* action,
+									uint32 what, ContextActionList* actions,
+									BMessage*& _message);
 			void				_FinishContextMenu(bool force);
 			void				_SaveViewState() const;
 			void				_RestoreViewState();

src/apps/debugger/user_interface/gui/team_window/WatchPromptWindow.cpp

@@ -0,0 +1,154 @@
+/*
+ * Copyright 2012, Rene Gollent, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#include "WatchPromptWindow.h"
+
+#include <Alert.h>
+#include <Button.h>
+#include <LayoutBuilder.h>
+#include <Menu.h>
+#include <MenuField.h>
+#include <MenuItem.h>
+#include <String.h>
+#include <TextControl.h>
+
+#include <ExpressionParser.h>
+
+#include "MessageCodes.h"
+#include "UserInterface.h"
+#include "Watchpoint.h"
+
+
+WatchPromptWindow::WatchPromptWindow(target_addr_t address, uint32 type,
+	int32 length, UserInterfaceListener* listener)
+	:
+	BWindow(BRect(), "Edit Watchpoint", B_FLOATING_WINDOW,
+		B_AUTO_UPDATE_SIZE_LIMITS | B_CLOSE_ON_ESCAPE),
+	fInitialAddress(address),
+	fInitialType(type),
+	fInitialLength(length),
+	fAddressInput(NULL),
+	fLengthInput(NULL),
+	fTypeField(NULL),
+	fListener(listener)
+{
+}
+
+
+WatchPromptWindow::~WatchPromptWindow()
+{
+}
+
+
+WatchPromptWindow*
+WatchPromptWindow::Create(target_addr_t address, uint32 type, int32 length,
+	UserInterfaceListener* listener)
+{
+	WatchPromptWindow* self = new WatchPromptWindow(address, type, length,
+		listener);
+
+	try {
+		self->_Init();
+	} catch (...) {
+		delete self;
+		throw;
+	}
+
+	return self;
+
+}
+
+void
+WatchPromptWindow::_Init()
+{
+	BString text;
+	text.SetToFormat("0x%" B_PRIx64, fInitialAddress);
+	fAddressInput = new BTextControl("Address:", text, NULL);
+
+	text.SetToFormat("%" B_PRId32, fInitialLength);
+	fLengthInput = new BTextControl("Length:", text, NULL);
+
+	BMenu* typeMenu = new BMenu("Watch Type");
+	typeMenu->AddItem(new BMenuItem("Read", NULL));
+	typeMenu->AddItem(new BMenuItem("Write", NULL));
+	typeMenu->AddItem(new BMenuItem("Read/Write", NULL));
+	fTypeField = new BMenuField("Type:", typeMenu);
+	BLayoutItem* labelItem = fTypeField->CreateLabelLayoutItem();
+	labelItem->View()->SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
+	BLayoutBuilder::Group<>(this, B_VERTICAL)
+		.SetInsets(4.0f, 4.0f, 4.0f, 4.0f)
+		.AddGroup(B_HORIZONTAL, 4.0f)
+			.Add(fAddressInput)
+		.End()
+		.AddGroup(B_HORIZONTAL, 4.0f)
+			.Add(fLengthInput)
+			.Add(labelItem)
+			.Add(fTypeField->CreateMenuBarLayoutItem())
+		.End()
+		.AddGroup(B_HORIZONTAL, 4.0f)
+			.AddGlue()
+			.Add((fWatchButton = new BButton("Set",
+					new BMessage(MSG_SET_WATCHPOINT))))
+			.Add((fCancelButton = new BButton("Cancel",
+					new BMessage(B_QUIT_REQUESTED))))
+		.End();
+
+	fWatchButton->SetTarget(this);
+	fCancelButton->SetTarget(this);
+
+	fTypeField->Menu()->SetLabelFromMarked(true);
+	fTypeField->Menu()->ItemAt(fInitialType)->SetMarked(true);
+}
+
+void
+WatchPromptWindow::Show()
+{
+	CenterOnScreen();
+	BWindow::Show();
+}
+
+void
+WatchPromptWindow::MessageReceived(BMessage* message)
+{
+	switch (message->what) {
+		case MSG_SET_WATCHPOINT:
+		{
+			target_addr_t address;
+			int32 length;
+			ExpressionParser parser;
+			parser.SetSupportHexInput(true);
+			BString errorMessage;
+			try {
+				address = parser.EvaluateToInt64(fAddressInput->Text());
+				length = (int32)parser.EvaluateToInt64(fLengthInput->Text());
+			} catch(ParseException parseError) {
+				errorMessage.SetToFormat("Failed to parse data: %s",
+					parseError.message.String());
+			} catch(...) {
+				errorMessage.SetToFormat(
+					"Unknown error while parsing address");
+			}
+
+			if (!errorMessage.IsEmpty()) {
+				BAlert* alert = new(std::nothrow) BAlert("Edit Watchpoint",
+					errorMessage.String(), "Close");
+				if (alert != NULL)
+					alert->Go();
+				break;
+			}
+
+			fListener->ClearWatchpointRequested(fInitialAddress);
+			fListener->SetWatchpointRequested(address, fTypeField->Menu()
+					->IndexOf(fTypeField->Menu()->FindMarked()), length, true);
+
+			PostMessage(B_QUIT_REQUESTED);
+
+			break;
+		}
+		default:
+			BWindow::MessageReceived(message);
+			break;
+	}
+
+}

src/apps/debugger/user_interface/gui/team_window/WatchPromptWindow.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2012, Rene Gollent, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef WATCH_PROMPT_WINDOW_H
+#define WATCH_PROMPT_WINDOW_H
+
+
+#include <Window.h>
+
+#include "types/Types.h"
+
+
+class BTextControl;
+class Watchpoint;
+class BMenuField;
+class UserInterfaceListener;
+
+
+class WatchPromptWindow : public BWindow
+{
+public:
+			// edit existing watchpoint
+								WatchPromptWindow(target_addr_t address,
+									uint32 type, int32 length,
+									UserInterfaceListener* listener);
+
+								~WatchPromptWindow();
+
+	static	WatchPromptWindow*	Create(target_addr_t address, uint32 type,
+									int32 length,
+									UserInterfaceListener* listener);
+									// throws
+
+
+	virtual	void				MessageReceived(BMessage* message);
+
+	virtual	void				Show();
+
+private:
+			void	 			_Init();
+
+
+private:
+			target_addr_t		fInitialAddress;
+			uint32				fInitialType;
+			int32				fInitialLength;
+			BTextControl*		fAddressInput;
+			BTextControl*		fLengthInput;
+			BMenuField*			fTypeField;
+			UserInterfaceListener* fListener;
+			BButton*			fWatchButton;
+			BButton*			fCancelButton;
+};
+
+#endif // WATCH_PROMPT_WINDOW_H