// Copyright (c) 2004-2010 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// Kernel Event handler for Run Mode Debug.

//

#include <e32def.h>

#include <e32def_private.h>

#include <e32cmn.h>

#include <e32cmn_private.h>

#include <kernel/arm/arm.h>

#include <kernel/kernel.h>

#include <kernel/kern_priv.h>

#include <nk_trace.h>

#include <rm_debug_api.h>

#include "debug_logging.h"

#include "d_process_tracker.h"

#include "d_rmd_stepping.h"

#include "rm_debug_kerneldriver.h"

#include "rm_debug_driver.h"

#include "rm_debug_eventhandler.h"

DRM_DebugEventHandler::DRM_DebugEventHandler()

	:	DKernelEventHandler(EventHandler, this)

{

	LOG_MSG("DRM_DebugEventHandler::DRM_DebugEventHandler()");

	for(TInt i=0; i<EEventLimit; i++)

		{

		iEventHandlers[i] = &DRM_DebugChannel::HandleUnsupportedEvent;

		}

	iEventHandlers[EEventUserTrace] = &DRM_DebugChannel::HandleUserTrace;

	iEventHandlers[EEventRemoveLibrary] = &DRM_DebugChannel::RemoveLibrary;

	iEventHandlers[EEventAddLibrary] = &DRM_DebugChannel::AddLibrary;

	iEventHandlers[EEventStartThread] = &DRM_DebugChannel::StartThread;

	iEventHandlers[EEventSwExc] = &DRM_DebugChannel::HandleSwException;

	iEventHandlers[EEventHwExc] = &DRM_DebugChannel::HandleHwException;

	iEventHandlers[EEventKillThread] = &DRM_DebugChannel::HandleEventKillThread;

	iEventHandlers[EEventAddProcess] = &DRM_DebugChannel::HandleAddProcessEvent;

	iEventHandlers[EEventRemoveProcess] = &DRM_DebugChannel::HandleRemoveProcessEvent;

}

TInt DRM_DebugEventHandler::Create(DLogicalDevice* aDevice, DLogicalChannel* aChannel, DThread* aClient)

{

	LOG_MSG3("DRM_DebugEventHandler::Create(), aClientthread=0x%08x id=%d", aClient, aClient->iId);

	TInt err;

	err = aDevice->Open();

	if (err != KErrNone)

		return err;

	iDevice = aDevice;

	iChannel = (DRM_DebugChannel*)aChannel; //Don't add ref the channel, since channel closes the event handler before it ever gets destroyed.

	err = aClient->Open();

	if (err != KErrNone)

		return err;

	iClientThread = aClient;

	// Use a semaphore to protect our data structures from concurrent access.

	err = Kern::SemaphoreCreate(iProtectionLock, _L("RM_DebugEventHandlerLock"), 1 /* Initial count */);

	if (err != KErrNone)

		return err;

	return Add();

}

DRM_DebugEventHandler::~DRM_DebugEventHandler()

{

	LOG_MSG("DRM_DebugEventHandler::~DRM_DebugEventHandler()");

	if (iProtectionLock)

		iProtectionLock->Close(NULL);

	if (iDevice)

		iDevice->Close(NULL);	

	if (iClientThread)

		Kern::SafeClose((DObject*&)iClientThread, NULL);

}

TInt DRM_DebugEventHandler::Start()

{

	LOG_MSG("DRM_DebugEventHandler::Start()");

	iTracking = ETrue;

	return KErrNone;

}

TInt DRM_DebugEventHandler::Stop()

{

	LOG_MSG("DRM_DebugEventHandler::Stop()");

	iTracking = EFalse;

	return KErrNone;

}

TUint DRM_DebugEventHandler::EventHandler(TKernelEvent aType, TAny* a1, TAny* a2, TAny* aThis)

{

	return ((DRM_DebugEventHandler*)aThis)->HandleEvent(aType, a1, a2);

}

TUint DRM_DebugEventHandler::HandleEvent(TKernelEvent aType, TAny* a1, TAny* a2)

	{

	/*

	 * Check if we are tracking things at all OR 

	 * this event is beyond the limit of known events OR 

	 * this event is from the debug thread itself (don't want to debug ourselves) OR

	 * this event has a handler (there is no point in proceeding without a handler)

	 */

	if( (!iTracking) || 

			(aType > (TUint32)EEventLimit) ||

			(iClientThread == &Kern::CurrentThread()) ||

	    (iEventHandlers[aType] == &DRM_DebugChannel::HandleUnsupportedEvent) )

		{

		return ERunNext;

		}

	return HandleSpecificEvent(aType,a1,a2) && aType == EEventHwExc ? EExcHandled : ERunNext;

	}

TBool DRM_DebugEventHandler::HandleSpecificEvent(TKernelEvent aType, TAny* a1, TAny* a2)

	{

	TBool ret = EFalse;

	NKern::ThreadEnterCS();

	LockDataAccess();

	if (iChannel)

		{

		ret = (iChannel->*(iEventHandlers[aType]))(a1, a2);

		}

	ReleaseDataAccess();

	NKern::ThreadLeaveCS();

	switch(aType)

		{

		case EEventHwExc:

		case EEventKillThread:

			{

			LOG_MSG2("DRM_DebugEventHandler::HandleEvent() -> FSWait(), kernel event type: %d", (TUint32)aType);

			TheDProcessTracker.FSWait();

			LOG_MSG("DRM_DebugEventHandler::HandleEvent() <- FSWait()");

			break;

			}

		default:

			break;

		}

	return ret;

	}