Add the beginnings of a BMessage type/value handler. Not yet registered with

the type handler roster since it's quite far from being complete.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42279 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/debugger/Jamfile

@@ -220,6 +220,7 @@ Application Debugger :
 	ValueNodeContainer.cpp
 
 	# value/type_handlers
+	BMessageTypeHandler.cpp
 	CStringTypeHandler.cpp
 
 	# value/value_handlers
@@ -233,6 +234,7 @@ Application Debugger :
 	# value/value_nodes
 	AddressValueNode.cpp
 	ArrayValueNode.cpp
+	BMessageValueNode.cpp
 	CompoundValueNode.cpp
 	CStringValueNode.cpp
 	EnumerationValueNode.cpp

src/apps/debugger/value/TypeHandlerRoster.cpp

@@ -14,6 +14,7 @@
 #include "AddressValueNode.h"
 #include "ArrayValueNode.h"
 #include "CompoundValueNode.h"
+#include "BMessageTypeHandler.h"
 #include "CStringTypeHandler.h"
 #include "EnumerationValueNode.h"
 #include "PointerToMemberValueNode.h"
@@ -126,25 +127,31 @@ TypeHandlerRoster::RegisterDefaultHandlers()
 	TypeHandler* handler;
 	BReference<TypeHandler> handlerReference;
 
-	#undef REGISTER_HANDLER
-	#define REGISTER_HANDLER(name)								\
+	#undef REGISTER_BASIC_HANDLER
+	#define REGISTER_BASIC_HANDLER(name)						\
 		handler = new(std::nothrow)								\
 			BasicTypeHandler<name##Type, name##ValueNode>();	\
 		handlerReference.SetTo(handler, true);					\
 		if (handler == NULL || !RegisterHandler(handler))		\
 			return B_NO_MEMORY;
 
-	REGISTER_HANDLER(Address);
-	REGISTER_HANDLER(Array);
-	REGISTER_HANDLER(Compound);
-	REGISTER_HANDLER(Enumeration);
-	REGISTER_HANDLER(PointerToMember);
-	REGISTER_HANDLER(Primitive);
+	REGISTER_BASIC_HANDLER(Address);
+	REGISTER_BASIC_HANDLER(Array);
+	REGISTER_BASIC_HANDLER(Compound);
+	REGISTER_BASIC_HANDLER(Enumeration);
+	REGISTER_BASIC_HANDLER(PointerToMember);
+	REGISTER_BASIC_HANDLER(Primitive);
 
-	handler = new(std::nothrow) CStringTypeHandler();
-	handlerReference.SetTo(handler, true);
-	if (handler == NULL || !RegisterHandler(handler))
-		return B_NO_MEMORY;
+	#undef REGISTER_SPECIALIZED_HANDLER
+	#define REGISTER_SPECIALIZED_HANDLER(name)					\
+		handler = new(std::nothrow)								\
+			name##TypeHandler();								\
+		handlerReference.SetTo(handler, true);					\
+		if (handler == NULL || !RegisterHandler(handler))		\
+			return B_NO_MEMORY;
+
+	REGISTER_SPECIALIZED_HANDLER(CString);
+//	REGISTER_SPECIALIZED_HANDLER(BMessage);
 
 	return B_OK;
 }

src/apps/debugger/value/ValueLoader.cpp

@@ -187,6 +187,19 @@ ValueLoader::LoadValue(ValueLocation* location, type_code valueType,
 }
 
 
+status_t
+ValueLoader::LoadRawValue(BVariant& location, size_t bytesToRead, void* _value)
+{
+	ssize_t bytesRead = fTeamMemory->ReadMemory(location.ToUInt64(),
+		_value, bytesToRead);
+	if (bytesRead < 0)
+		return bytesRead;
+	if ((uint32)bytesRead != bytesToRead)
+		return B_BAD_ADDRESS;
+	return B_OK;
+}
+
+
 status_t
 ValueLoader::LoadStringValue(BVariant& location, size_t maxSize, BString& _value)
 {

src/apps/debugger/value/ValueLoader.h

@@ -31,6 +31,9 @@ public:
 									type_code valueType, bool shortValueIsFine,
 									BVariant& _value);
 
+			status_t			LoadRawValue(BVariant& location,
+									size_t maxSize, void* _value);
+
 			status_t			LoadStringValue(BVariant& location,
 									size_t maxSize, BString& _value);
 

src/apps/debugger/value/type_handlers/BMessageTypeHandler.cpp

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2011, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "BMessageTypeHandler.h"
+
+#include <new>
+
+#include "BMessageValueNode.h"
+#include "Type.h"
+
+
+BMessageTypeHandler::~BMessageTypeHandler()
+{
+}
+
+
+float
+BMessageTypeHandler::SupportsType(Type* type)
+{
+	AddressType* addressType = dynamic_cast<AddressType*>(type);
+	CompoundType* baseType = dynamic_cast<CompoundType*>(type);
+	ModifiedType* modifiedType = NULL;
+	if (addressType != NULL && addressType->AddressKind()
+		== DERIVED_TYPE_POINTER) {
+			baseType = dynamic_cast<CompoundType*>(
+				addressType->BaseType());
+		if (baseType == NULL) {
+			modifiedType = dynamic_cast<ModifiedType*>(
+				addressType->BaseType());
+		}
+	}
+
+	if (baseType == NULL && modifiedType == NULL)
+		return 0.0f;
+	else if (modifiedType != NULL) {
+		baseType = dynamic_cast<CompoundType*>(
+			modifiedType->ResolveRawType(false));
+		if (baseType == NULL)
+			return 0.0f;
+	}
+
+	if (baseType->ResolveRawType(true)->Name() == "BMessage")
+		return 1.0f;
+
+	return 0.0f;
+}
+
+
+status_t
+BMessageTypeHandler::CreateValueNode(ValueNodeChild* nodeChild, Type* type,
+	ValueNode*& _node)
+{
+	if (SupportsType(type) == 0.0f)
+		return B_BAD_VALUE;
+
+	ValueNode* node = new(std::nothrow) BMessageValueNode(nodeChild,
+		type);
+
+	if (node == NULL)
+		return B_NO_MEMORY;
+
+	_node = node;
+
+	return B_OK;
+}

src/apps/debugger/value/type_handlers/BMessageTypeHandler.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2011, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef BMESSAGE_TYPE_HANDLER_H
+#define BMESSAGE_TYPE_HANDLER_H
+
+
+#include "TypeHandler.h"
+
+
+class BMessageTypeHandler : public TypeHandler {
+public:
+	virtual					~BMessageTypeHandler();
+
+	virtual float			SupportsType(Type* type);
+	virtual status_t		CreateValueNode(ValueNodeChild* nodeChild,
+								Type* type, ValueNode*& _node);
+};
+
+#endif // BMESSAGE_TYPE_HANDLER_H

src/apps/debugger/value/value_nodes/BMessageValueNode.cpp

@@ -0,0 +1,115 @@
+/*
+ * Copyright 2011, Rene Gollent, rene@gollent.com
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "BMessageValueNode.h"
+
+#include <new>
+
+#include <Message.h>
+
+#include "Architecture.h"
+#include "StringValue.h"
+#include "Tracing.h"
+#include "Type.h"
+#include "ValueLoader.h"
+#include "ValueLocation.h"
+#include "ValueNodeContainer.h"
+
+
+// #pragma mark - BMessageValueNode
+
+
+BMessageValueNode::BMessageValueNode(ValueNodeChild* nodeChild,
+	Type* type)
+	:
+	ValueNode(nodeChild),
+	fType(type)
+{
+	fType->AcquireReference();
+}
+
+
+BMessageValueNode::~BMessageValueNode()
+{
+	fType->ReleaseReference();
+}
+
+
+Type*
+BMessageValueNode::GetType() const
+{
+	return fType;
+}
+
+
+status_t
+BMessageValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
+	ValueLocation*& _location, Value*& _value)
+{
+	// get the location
+	ValueLocation* location = NodeChild()->Location();
+	if (location == NULL)
+		return B_BAD_VALUE;
+
+	TRACE_LOCALS("  TYPE_ADDRESS (BMessage)\n");
+
+	// get the value type
+	type_code valueType;
+	if (valueLoader->GetArchitecture()->AddressSize() == 4) {
+		valueType = B_UINT32_TYPE;
+		TRACE_LOCALS("    -> 32 bit\n");
+	} else {
+		valueType = B_UINT64_TYPE;
+		TRACE_LOCALS("    -> 64 bit\n");
+	}
+
+	// load the value data
+
+	BVariant addressData;
+	status_t error = B_OK;
+	if (dynamic_cast<AddressType*>(fType) != NULL) {
+		error = valueLoader->LoadValue(location, valueType, false,
+			addressData);
+	} else
+		addressData.SetTo(location->PieceAt(0).address);
+
+
+	TRACE_LOCALS("Address: 0x%" B_PRIx64 "\n", addressData.ToUInt64());
+
+	uint8 buffer[sizeof(BMessage)];
+	error = valueLoader->LoadRawValue(addressData, sizeof(BMessage), buffer);
+	if (error == B_OK) {
+		BMessage* message = (BMessage *)buffer;
+		TRACE_LOCALS("Loaded BMessage('%c%c%c%c')\n",
+			char((message->what >> 24) & 0xff),
+			char((message->what >> 16) & 0xff),
+			char((message->what >> 8) & 0xff),
+			char(message->what & 0xff));
+	}
+
+	return B_BAD_VALUE;
+}
+
+
+status_t
+BMessageValueNode::CreateChildren()
+{
+	return B_OK;
+}
+
+
+int32
+BMessageValueNode::CountChildren() const
+{
+	return 0;
+}
+
+
+ValueNodeChild*
+BMessageValueNode::ChildAt(int32 index) const
+{
+	return NULL;
+}

src/apps/debugger/value/value_nodes/BMessageValueNode.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2011, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef BMESSAGE_VALUE_NODE_H
+#define BMESSAGE_VALUE_NODE_H
+
+
+#include "ValueNode.h"
+
+
+class BMessageValueNode : public ValueNode {
+public:
+								BMessageValueNode(ValueNodeChild* nodeChild,
+									Type* type);
+	virtual						~BMessageValueNode();
+
+	virtual	Type*				GetType() const;
+
+	virtual	status_t			ResolvedLocationAndValue(
+									ValueLoader* valueLoader,
+									ValueLocation*& _location,
+									Value*& _value);
+
+	virtual status_t			CreateChildren();
+	virtual int32				CountChildren() const;
+	virtual ValueNodeChild*		ChildAt(int32 index) const;
+
+private:
+			Type*				fType;
+};
+
+#endif	// BMESSAGE_VALUE_NODE_H