// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

// Trace API

// 

//

#ifndef UTRACE_H

#define UTRACE_H

#ifdef __KERNEL_MODE__

#include <kernel/kernel.h>

#else //__KERNEL_MODE__

#include <e32std.h>

#endif //__KERNEL_MODE__

#include <e32btrace.h>

/**

@file

@publishedPartner

@prototype

*/

/**

Primary filter type.

The primary filter type used as classification information.

*/

typedef TUint8 TPrimaryFilter;

/**

Secondary filter type.

The secondary filter type used as classification information.

*/

typedef TUint32 TSecondaryFilter;

/**

The trace contains information used to debug an application

This can be used in both UREL and UDEB builds.

*/

const TPrimaryFilter  KDebug = 253;

/**

Schema type.

Use the schema in conjunction with primary and secondary filters to determine

how a trace shall be interpreted.

The schema must represent a specific, well-documented, and consistent plan;

a way to define the structure and/or its content.

*/

typedef TUint8 TTraceSchema;

/**

The schema is binary, or raw data.

*/

const TTraceSchema KBinary = 0;//Binary format

/**

The schema is ASCII text.

*/

const TTraceSchema KText = 1;//Text only

/**

Maximum length of a formatted string

*/

const TInt KMaxPrintfSize = 256;

/**@internalComponent*/

#define UTRACE_HEADER(aSize,aF1,aSchema,aContext,aPc)																\

	((((aSize)+(4&(TBool)aContext<<2)+(4&(TBool)aPc<<2))<<BTrace::ESizeIndex*8)										\

	+(((BTrace::EContextIdPresent & (aContext<<3))|(BTrace::EPcPresent & (aPc<<4)))<<BTrace::EFlagsIndex*8)			\

	+((aF1)<<BTrace::ECategoryIndex*8)																				\

	+((aSchema)<<BTrace::ESubCategoryIndex*8))

/**@internalComponent*/

#define UTracePf0(aF1,aSchema,aContext,aPc)	\

    BTrace::OutX \

        (UTRACE_HEADER(4,(aF1),(aSchema),(aContext),(aPc)),0,0,0)

/**@internalComponent*/

#define UTracePf1(aF1,aSchema,aContext,aPc,a1)	\

    BTrace::OutX(UTRACE_HEADER(8,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(a1),0,0)

/**@internalComponent*/

#define UTracePf2(aF1,aSchema,aContext,aPc,a1,a2) \

    BTrace::OutX(UTRACE_HEADER(12,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(a1),(TUint32)(a2),0)

/**@internalComponent*/

#define UTracePf3(aF1,aSchema,aContext,aPc,a1,a2,a3) \

	BTrace::OutX(UTRACE_HEADER(16,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(a1),(TUint32)(a2),(TUint32)(a3))

/**@internalComponent*/

#define UTracePfAny(aF1,aSchema,aContext,aPc,a1,aData,aDataSize) \

	BTrace::OutBig(UTRACE_HEADER(8,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(a1),aData,(TInt)(aDataSize))

/**@internalComponent*/

#define UTraceSf0(aF1,aF2,aSchema,aContext,aPc)	\

    BTrace::OutFilteredX(UTRACE_HEADER(8,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(aF2),0,0)

/** @internalComponent */

#define UTraceSf1(aF1,aF2,aSchema,aContext,aPc,a1) \

    BTrace::OutFilteredX(UTRACE_HEADER(12,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(aF2),(TUint32)(a1),0)

/** @internalComponent */

#define UTraceSf2(aF1,aF2,aSchema,aContext,aPc,a1,a2) \

	BTrace::OutFilteredX(UTRACE_HEADER(16,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(aF2),(TUint32)(a1),(TUint32)(a2))

/** @internalComponent */

#define UTraceSfAny(aF1,aF2,aSchema,aContext,aPc,aData,aDataSize) \

	BTrace::OutFilteredBig(UTRACE_HEADER(8,(aF1),(aSchema),(aContext),(aPc)),(TUint32)(aF2),aData,(TInt)(aDataSize))

/**

Class for tracing from user and kernel side.

This appends entries to a trace log.

Each trace point require classification information to be passed.

Classification information, i.e. primary and secondary filter,

is meta-data about the trace entry that can be used for

filtering, e.g. the  trace was inserted by a particular component.

In order to append trace points to the trace log they

need to be turned on and off at run-time, based on the classification.

It is also possible to turn trace points on and off

at compile-time using the SYMBIAN_TRACE_ENABLE macro.

The class can be used in two ways, either using the

static methods without any preparatory work, or by setting up

an object which has all necessary information pre-defined which

allows each consecutive call to contain a minimum of information.

The latter set of methods are more intrusive both at run-time and

for foot print.

@code

TBool includeContextID = ETrue;

TBool includePc = EFalse;

TUint32 traceData = aData;

TPrimaryFilter filter1 = 253;

TUTrace tracer(filter1, KBinary, includeContextID, includePc);

tracer.Printf(_L("My trace point."));

tracer.Trace(traceData);

//or

TUTrace::PrintfPrimary(filter1, KBinary, includeContextID, includePc, _L("My trace point with data %i."), traceData);

TUTrace::TracePrimary(filter1, KBinary, includeContextID, includePc, traceData);

@endcode

Note:

Trace does not enforce any security. It is the developer's responsibility

to ensure that trace points do not contain any sensitive information that may 

be used to compromise platform security.

@publishedPartner

@prototype

*/

#if defined (SYMBIAN_TRACE_ENABLE) || defined (__DOXYGEN__)

class TUTrace

{

public:

	/**

	Construct a trace object with classification for

	primary filter only.

	@param aF1 Primary filter as classification information

	@param aSchema The schema used to determine the format of the content

	@param aIncludeContextID Include context ID in the trace

	@param aIncludePc Include program counter in the trace

	*/

	TUTrace(TPrimaryFilter aF1, TTraceSchema aSchema, TBool aIncludeContextID, TBool aIncludePc)

		{

		Set(aF1, aSchema, aIncludeContextID, aIncludePc);

		}

	/**

	Construct a trace object with classification for both

	primary and secondary filters.

	@param aF1 Primary filter as classification information

	@param aF2 Secondary filter as classification information

	@param aSchema The schema used to determine the format of the content

	@param aIncludeContextID Include context ID in the trace

	@param aIncludePc Include program counter in the trace

	*/

	TUTrace(TPrimaryFilter aF1, TSecondaryFilter aF2, TTraceSchema aSchema, TBool aIncludeContextID, TBool aIncludePc)

		{

		Set(aF1, aF2, aSchema, aIncludeContextID, aIncludePc);

		}

	/**

	Set the classification and additional information.

	@param aF1 Primary filter as classification information

	@param aSchema The schema used to determine the format of the content

	@param aIncludeContextID Include context ID in the trace

	@param aIncludePc Include program counter in the trace

	*/

	void Set(TPrimaryFilter aF1, TTraceSchema aSchema, TBool aIncludeContextID, TBool aIncludePc)

		{

		iF2 = 0;

		iF1 = aF1;

		iSchema = aSchema;

		iPresent = aIncludeContextID;

		iPresent |= aIncludePc << EPc;

		iReserved1 = 0;

		iReserved2 = 0;

		}

	/**

	Set the classification and additional information.

	@param aF1 Primary filter as classification information

	@param aF2 Secondary filter as classification information

	@param aSchema The schema used to determine the format of the content

	@param aIncludeContextID Include context ID in the trace

	@param aIncludePc Include program counter in the trace

	*/

	void Set(TPrimaryFilter aF1, TSecondaryFilter aF2, TTraceSchema aSchema, TBool aIncludeContextID , TBool aIncludePc)

		{

		Set(aF1, aSchema, aIncludeContextID, aIncludePc);

		iF2 = aF2;

		}

	#ifdef  __KERNEL_MODE__

	/**

	Prints a formatted string in kernel mode only.

	The function uses Kern::AppendFormat() to do the formatting.

	Although it is safe to call this function from an ISR, it polls the output

	serial port and may take a long time to complete, invalidating any

	real-time guarantee.

	If called from an ISR, it is possible for output text to be intermingled

	with other output text if one set of output interrupts or preempts another.

	Some of the formatting options may not work inside an ISR.

	Be careful not to use a string that is too long to fit onto the stack.

	If the specified string is too big to fit into a single	trace

	a multipart trace is generated.

	@param aFmt The format string. This must not be longer than 256 characters.

	@param ...	A variable number of arguments to be converted to text as dictated

				by the format string.

	@return The trace was/was not logged.

	@pre Calling thread can either be in a critical section or not.

	@pre Interrupts must be enabled.

	@pre Kernel must be unlocked

	@pre Call in any context.

	@pre Suitable for use in a device driver

	@pre Classification information must be set up

	@see Kern::AppendFormat()

	@see BTrace::TMultipart

	*/

	TBool Printf(const char* aFmt, ...)

		{

		TBuf8<KMaxPrintfSize> buf;

		VA_LIST list;

		VA_START(list,aFmt);

		Kern::AppendFormat(buf,aFmt,list);

		TUint8 oldFormat = iSchema;

		iSchema = KText;

		TBool logged = EFalse;

		logged = Trace(buf.Ptr(),buf.Size());

		iSchema = oldFormat;

		return logged;

		}

	#else //__KERNEL_MODE__

	/**

	Prints a formatted string.

	@param aFmt The format string. This must not be longer than 256 characters.

	@param ...	A variable number of arguments to be converted to text as dictated

				by the format string.

	@return The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Printf(const char* aFmt, ...)

		{

		TTruncateOverflow8 overflow;

		VA_LIST list;

		VA_START(list,aFmt);

		TPtrC8 fmt((const TText8*)aFmt);

		TBuf8<KMaxPrintfSize> buf;

		buf.AppendFormatList(fmt,list,&overflow);

		TUint8 oldFormat = iSchema;

		iSchema = KText;

		TBool logged = EFalse;

		logged = Trace(buf.PtrZ(),buf.Size());

		iSchema = oldFormat;

		return logged;

		};

	/**

	Prints a formatted string.

	@param aFmt The format string. This must not be longer than 256 characters.

	@param ...	A variable number of arguments to be converted to text as dictated

				by the format string.

	@return The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Printf(TRefByValue<const TDesC16> aFmt,...)

	    {

	    TTruncateOverflow16 overflow;

		VA_LIST list;

		VA_START(list,aFmt);

		TBuf<KMaxPrintfSize> buf;

		buf.AppendFormatList(aFmt,list,&overflow);

		TUint8 oldFormat = iSchema;

		iSchema = KText;

		TBool logged = EFalse;

		#ifdef _UNICODE

		TPtr8 p(buf.Collapse());

		logged = Trace(buf.PtrZ(), p.Size());

		#else

		logged = Trace(buf.PtrZ(), buf.Size());

		#endif //_UNICODE

		iSchema = oldFormat;

		return logged;

	    };

	/**

	Prints a string.

	@param aDes The string. This can be of variable length.

	@return The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Printf(const TDesC8& aDes)

		{

		TUint8 oldFormat = iSchema;

		iSchema = KText;

		TBool logged = EFalse;

		logged = Trace(aDes.Ptr(), aDes.Size());

		iSchema = oldFormat;

		return logged;

		};

	/**

	Prints a string.

	@param aDes The string. This can be of variable length.

	@return The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Printf(const TDesC16& aDes)

	    {

		TUint8 oldFormat = iSchema;

		iSchema = KText;

		TBool logged = EFalse;

		logged = Trace(aDes.Ptr(), aDes.Size());

		iSchema = oldFormat;

		return logged;

		};

	#endif //__KERNEL_MODE__

	/**

	Sends a trace with no payload data.

	@return The trace was/was not logged.

	@pre Classification information must be set up

	*/

    TBool Trace()

		{

		if(iF2 > 0)

			{

			return UTraceSf0(iF1,iF2,iSchema,ContextID(),Pc());

			}

		return UTracePf0(iF1,iSchema,ContextID(),Pc());

		};

	/**

	Sends a trace containing 4 bytes of data.

	@param aData1	4 bytes of data.

	@return 		The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Trace(TUint32 aData1)

		{

		if(iF2 > 0)

			{

			return UTraceSf1(iF1,iF2,iSchema,ContextID(),Pc(), aData1);

			}

		return UTracePf1(iF1,iSchema,ContextID(),Pc(), aData1);

		};

	/**

	Sends a trace with 8 bytes of data.

	@param aData1	4 bytes of data

	@param aData2	4 bytes of data

	@return 		The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Trace(TUint32 aData1, TUint32 aData2)

		{

		if(iF2 > 0)

			{

			return UTraceSf2(iF1,iF2,iSchema,ContextID(),Pc(), aData1, aData2);

			}

		return UTracePf2(iF1,iSchema,ContextID(),Pc(),aData1,aData2);

		};

	/**

	Sends a trace with 12 bytes of data.

	Note: This method does not support secondary filtering.

	@param aData1	4 bytes of data

	@param aData2	4 bytes of data

	@param aData3	4 bytes of data

	@return 		The trace was/was not logged.

	@pre Classification information must be set up

	*/

	TBool Trace(TUint32 aData1, TUint32 aData2,  TUint32 aData3)

		{

		if(iF2 > 0)

			{

			return EFalse;

			}

		return UTracePf3(iF1,iSchema,ContextID(),Pc(),aData1,aData2,aData3);

		};

	/**

	Sends a trace with variable length data.

	If the specified data is too big to fit into a single

	trace record a multipart trace is generated.

	@param aData	Address of addition data to add to trace.

					Must be word aligned, i.e. a multiple of 4.

	@param aSize	Number of bytes of additional data.

	@return 		The trace was/was not logged.

	@pre Classification information must be set up

	@see BTrace::TMultipart

	*/

	TBool Trace(const TAny* aData, TInt aSize)

		{

		if(iF2 > 0)

			{

			return UTraceSfAny(iF1,iF2,iSchema,ContextID(),Pc(),aData,aSize);

			}

		return UTracePfAny(iF1,iSchema,ContextID(),Pc(),0,aData,aSize);

		};

	//Static methods

	#ifdef __KERNEL_MODE__

	/**

	Prints a formatted string in kernel mode only.

	The trace is classified by primary filter only.

	The function uses Kern::AppendFormat() to do the formatting.

	Although it is safe to call this function from an ISR, it polls the output

	serial port and may take a long time to complete, invalidating any

	real-time guarantee.

	If called from an ISR, it is possible for output text to be intermingled

	with other output text if one set of output interrupts or preempts another.

	Some of the formatting options may not work inside an ISR.

	Be careful not to use a string that is too long to fit onto the stack.

	If the specified string is too long to fit into a single trace record

	a multipart trace is generated.

	@param aF1			Primary filter as classification information

	@param aIncludeContextID Include context ID in the trace

	@param aIncludePc	Include program counter in the trace

	@param aFmt 		The format string. This must not be longer than 256 characters.

	@param ...			A variable number of arguments to be converted to text as dictated

						by the format string.

	@return 			The trace was/was not logged.

	@pre Calling thread can either be in a critical section or not.

	@pre Interrupts must be enabled.

	@pre Kernel must be unlocked

	@pre Call in any context.

	@pre Suitable for use in a device driver

	@see Kern::AppendFormat()

	@see BTrace::TMultipart

	*/

	static TBool PrintfPrimary(TPrimaryFilter aF1, TBool aIncludeContextID, TBool aIncludePc, const char* aFmt, ...)

		{

		TBuf8<KMaxPrintfSize> buf;

		VA_LIST list;

		VA_START(list,aFmt);

		Kern::AppendFormat(buf,aFmt,list);