/** @file
Provides services to print debug and assert messages to a debug output device.
The Debug library supports debug print and asserts based on a combination of macros and code.
The debug library can be turned on and off so that the debug code does not increase the size of an image.
Note that a reserved macro named MDEPKG_NDEBUG is introduced for the intention
of size reduction when compiler optimization is disabled. If MDEPKG_NDEBUG is
defined, then debug and assert related macros wrapped by it are the NULL implementations.
Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __DEBUG_LIB_H__
#define __DEBUG_LIB_H__
//
// Declare bits for PcdDebugPropertyMask
//
#define DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED 0x01
#define DEBUG_PROPERTY_DEBUG_PRINT_ENABLED 0x02
#define DEBUG_PROPERTY_DEBUG_CODE_ENABLED 0x04
#define DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED 0x08
#define DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED 0x10
#define DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED 0x20
//
// Declare bits for PcdDebugPrintErrorLevel and the ErrorLevel parameter of DebugPrint()
//
#define DEBUG_INIT 0x00000001 // Initialization
#define DEBUG_WARN 0x00000002 // Warnings
#define DEBUG_LOAD 0x00000004 // Load events
#define DEBUG_FS 0x00000008 // EFI File system
#define DEBUG_POOL 0x00000010 // Alloc & Free (pool)
#define DEBUG_PAGE 0x00000020 // Alloc & Free (page)
#define DEBUG_INFO 0x00000040 // Informational debug messages
#define DEBUG_DISPATCH 0x00000080 // PEI/DXE/SMM Dispatchers
#define DEBUG_VARIABLE 0x00000100 // Variable
#define DEBUG_BM 0x00000400 // Boot Manager
#define DEBUG_BLKIO 0x00001000 // BlkIo Driver
#define DEBUG_NET 0x00004000 // Network Io Driver
#define DEBUG_UNDI 0x00010000 // UNDI Driver
#define DEBUG_LOADFILE 0x00020000 // LoadFile
#define DEBUG_EVENT 0x00080000 // Event messages
#define DEBUG_GCD 0x00100000 // Global Coherency Database changes
#define DEBUG_CACHE 0x00200000 // Memory range cachability changes
#define DEBUG_VERBOSE 0x00400000 // Detailed debug messages that may
// significantly impact boot performance
#define DEBUG_ERROR 0x80000000 // Error
//
// Aliases of debug message mask bits
//
#define EFI_D_INIT DEBUG_INIT
#define EFI_D_WARN DEBUG_WARN
#define EFI_D_LOAD DEBUG_LOAD
#define EFI_D_FS DEBUG_FS
#define EFI_D_POOL DEBUG_POOL
#define EFI_D_PAGE DEBUG_PAGE
#define EFI_D_INFO DEBUG_INFO
#define EFI_D_DISPATCH DEBUG_DISPATCH
#define EFI_D_VARIABLE DEBUG_VARIABLE
#define EFI_D_BM DEBUG_BM
#define EFI_D_BLKIO DEBUG_BLKIO
#define EFI_D_NET DEBUG_NET
#define EFI_D_UNDI DEBUG_UNDI
#define EFI_D_LOADFILE DEBUG_LOADFILE
#define EFI_D_EVENT DEBUG_EVENT
#define EFI_D_VERBOSE DEBUG_VERBOSE
#define EFI_D_ERROR DEBUG_ERROR
/**
Prints a debug message to the debug output device if the specified error level is enabled.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), then print the message specified by Format and the
associated variable argument list to the debug output device.
If Format is NULL, then ASSERT().
@param ErrorLevel The error level of the debug message.
@param Format The format string for the debug message to print.
@param ... The variable argument list whose contents are accessed
based on the format string specified by Format.
**/
VOID
EFIAPI
DebugPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
...
);
/**
Prints a debug message to the debug output device if the specified
error level is enabled.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), then print the message specified by Format and
the associated variable argument list to the debug output device.
If Format is NULL, then ASSERT().
@param ErrorLevel The error level of the debug message.
@param Format Format string for the debug message to print.
@param VaListMarker VA_LIST marker for the variable argument list.
**/
VOID
EFIAPI
DebugVPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN VA_LIST VaListMarker
);
/**
Prints a debug message to the debug output device if the specified
error level is enabled.
This function use BASE_LIST which would provide a more compatible
service than VA_LIST.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), then print the message specified by Format and
the associated variable argument list to the debug output device.
If Format is NULL, then ASSERT().
@param ErrorLevel The error level of the debug message.
@param Format Format string for the debug message to print.
@param BaseListMarker BASE_LIST marker for the variable argument list.
**/
VOID
EFIAPI
DebugBPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN BASE_LIST BaseListMarker
);
/**
Prints an assert message containing a filename, line number, and description.
This may be followed by a breakpoint or a dead loop.
Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"
to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of
PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if
DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then
CpuDeadLoop() is called. If neither of these bits are set, then this function
returns immediately after the message is printed to the debug output device.
DebugAssert() must actively prevent recursion. If DebugAssert() is called while
processing another DebugAssert(), then DebugAssert() must return immediately.
If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.
If Description is NULL, then a <Description> string of "(NULL) Description" is printed.
@param FileName The pointer to the name of the source file that generated the assert condition.
@param LineNumber The line number in the source file that generated the assert condition
@param Description The pointer to the description of the assert condition.
**/
VOID
EFIAPI
DebugAssert (
IN CONST CHAR8 *FileName,
IN UINTN LineNumber,
IN CONST CHAR8 *Description
);
/**
Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.
This function fills Length bytes of Buffer with the value specified by
PcdDebugClearMemoryValue, and returns Buffer.
If Buffer is NULL, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.
@param Length The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.
@return Buffer The pointer to the target buffer filled with PcdDebugClearMemoryValue.
**/
VOID *
EFIAPI
DebugClearMemory (
OUT VOID *Buffer,
IN UINTN Length
);
/**
Returns TRUE if ASSERT() macros are enabled.
This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of
PcdDebugProperyMask is set. Otherwise, FALSE is returned.
@retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
@retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.
**/
BOOLEAN
EFIAPI
DebugAssertEnabled (
VOID
);
/**
Returns TRUE if DEBUG() macros are enabled.
This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of
PcdDebugProperyMask is set. Otherwise, FALSE is returned.
@retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
@retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.
**/
BOOLEAN
EFIAPI
DebugPrintEnabled (
VOID
);
/**
Returns TRUE if DEBUG_CODE() macros are enabled.
This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of
PcdDebugProperyMask is set. Otherwise, FALSE is returned.
@retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
@retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.
**/
BOOLEAN
EFIAPI
DebugCodeEnabled (
VOID
);
/**
Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.
This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of
PcdDebugProperyMask is set. Otherwise, FALSE is returned.
@retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
@retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.
**/
BOOLEAN
EFIAPI
DebugClearMemoryEnabled (
VOID
);
/**
Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.
This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.
@retval TRUE Current ErrorLevel is supported.
@retval FALSE Current ErrorLevel is not supported.
**/
BOOLEAN
EFIAPI
DebugPrintLevelEnabled (
IN CONST UINTN ErrorLevel
);
/**
Internal worker macro that calls DebugAssert().
This macro calls DebugAssert(), passing in the filename, line number, and an
expression that evaluated to FALSE.
@param Expression Boolean expression that evaluated to FALSE
**/
#if defined(__clang__) && defined(__FILE_NAME__)
#define _ASSERT(Expression) DebugAssert (__FILE_NAME__, __LINE__, #Expression)
#else
#define _ASSERT(Expression) DebugAssert (__FILE__, __LINE__, #Expression)
#endif
/**
Internal worker macro that calls DebugPrint().
This macro calls DebugPrint() passing in the debug error level, a format
string, and a variable argument list.
__VA_ARGS__ is not supported by EBC compiler, Microsoft Visual Studio .NET 2003
and Microsoft Windows Server 2003 Driver Development Kit (Microsoft WINDDK) version 3790.1830.
@param Expression Expression containing an error level, a format string,
and a variable argument list based on the format string.
**/
#if !defined(MDE_CPU_EBC) && (!defined (_MSC_VER) || _MSC_VER > 1400)
#define _DEBUG_PRINT(PrintLevel, ...) \
do { \
if (DebugPrintLevelEnabled (PrintLevel)) { \
DebugPrint (PrintLevel, ##__VA_ARGS__); \
} \
} while (FALSE)
#define _DEBUG(Expression) _DEBUG_PRINT Expression
#else
#define _DEBUG(Expression) DebugPrint Expression
#endif
/**
Macro that calls DebugAssert() if an expression evaluates to FALSE.
If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
bit of PcdDebugProperyMask is set, then this macro evaluates the Boolean
expression specified by Expression. If Expression evaluates to FALSE, then
DebugAssert() is called passing in the source filename, source line number,
and Expression.
@param Expression Boolean expression.
**/
#if !defined(MDEPKG_NDEBUG)
#define ASSERT(Expression) \
do { \
if (DebugAssertEnabled ()) { \
if (!(Expression)) { \
_ASSERT (Expression); \
ANALYZER_UNREACHABLE (); \
} \
} \
} while (FALSE)
#else
#define ASSERT(Expression)
#endif
/**
Macro that calls DebugPrint().
If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED
bit of PcdDebugProperyMask is set, then this macro passes Expression to
DebugPrint().
@param Expression Expression containing an error level, a format string,
and a variable argument list based on the format string.
**/
#if !defined(MDEPKG_NDEBUG)
#define DEBUG(Expression) \
do { \
if (DebugPrintEnabled ()) { \
_DEBUG (Expression); \
} \
} while (FALSE)
#else
#define DEBUG(Expression)
#endif
/**
Macro that calls DebugAssert() if an EFI_STATUS evaluates to an error code.
If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
bit of PcdDebugProperyMask is set, then this macro evaluates the EFI_STATUS
value specified by StatusParameter. If StatusParameter is an error code,
then DebugAssert() is called passing in the source filename, source line
number, and StatusParameter.
@param StatusParameter EFI_STATUS value to evaluate.
**/
#if !defined(MDEPKG_NDEBUG)
#define ASSERT_EFI_ERROR(StatusParameter) \
do { \
if (DebugAssertEnabled ()) { \
if (EFI_ERROR (StatusParameter)) { \
DEBUG ((EFI_D_ERROR, "\nASSERT_EFI_ERROR (Status = %r)\n", StatusParameter)); \
_ASSERT (!EFI_ERROR (StatusParameter)); \
} \
} \
} while (FALSE)
#else
#define ASSERT_EFI_ERROR(StatusParameter)
#endif
/**
Macro that calls DebugAssert() if a RETURN_STATUS evaluates to an error code.
If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
bit of PcdDebugProperyMask is set, then this macro evaluates the
RETURN_STATUS value specified by StatusParameter. If StatusParameter is an
error code, then DebugAssert() is called passing in the source filename,
source line number, and StatusParameter.
@param StatusParameter RETURN_STATUS value to evaluate.
**/
#if !defined(MDEPKG_NDEBUG)
#define ASSERT_RETURN_ERROR(StatusParameter) \
do { \
if (DebugAssertEnabled ()) { \
if (RETURN_ERROR (StatusParameter)) { \
DEBUG ((DEBUG_ERROR, "\nASSERT_RETURN_ERROR (Status = %r)\n", \
StatusParameter)); \
_ASSERT (!RETURN_ERROR (StatusParameter)); \
} \
} \
} while (FALSE)
#else
#define ASSERT_RETURN_ERROR(StatusParameter)
#endif
/**
Macro that calls DebugAssert() if a protocol is already installed in the
handle database.
If MDEPKG_NDEBUG is defined or the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit
of PcdDebugProperyMask is clear, then return.
If Handle is NULL, then a check is made to see if the protocol specified by Guid
is present on any handle in the handle database. If Handle is not NULL, then
a check is made to see if the protocol specified by Guid is present on the
handle specified by Handle. If the check finds the protocol, then DebugAssert()
is called passing in the source filename, source line number, and Guid.
If Guid is NULL, then ASSERT().
@param Handle The handle to check for the protocol. This is an optional
parameter that may be NULL. If it is NULL, then the entire
handle database is searched.
@param Guid The pointer to a protocol GUID.
**/
#if !defined(MDEPKG_NDEBUG)
#define ASSERT_PROTOCOL_ALREADY_INSTALLED(Handle, Guid) \
do { \
if (DebugAssertEnabled ()) { \
VOID *Instance; \
ASSERT (Guid != NULL); \
if (Handle == NULL) { \
if (!EFI_ERROR (gBS->LocateProtocol ((EFI_GUID *)Guid, NULL, &Instance))) { \
_ASSERT (Guid already installed in database); \
} \
} else { \
if (!EFI_ERROR (gBS->HandleProtocol (Handle, (EFI_GUID *)Guid, &Instance))) { \
_ASSERT (Guid already installed on Handle); \
} \
} \
} \
} while (FALSE)
#else
#define ASSERT_PROTOCOL_ALREADY_INSTALLED(Handle, Guid)
#endif
/**
Macro that marks the beginning of debug source code.
If the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set,
then this macro marks the beginning of source code that is included in a module.
Otherwise, the source lines between DEBUG_CODE_BEGIN() and DEBUG_CODE_END()
are not included in a module.
**/
#define DEBUG_CODE_BEGIN() do { if (DebugCodeEnabled ()) { UINT8 __DebugCodeLocal
/**
The macro that marks the end of debug source code.
If the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set,
then this macro marks the end of source code that is included in a module.
Otherwise, the source lines between DEBUG_CODE_BEGIN() and DEBUG_CODE_END()
are not included in a module.
**/
#define DEBUG_CODE_END() __DebugCodeLocal = 0; __DebugCodeLocal++; } } while (FALSE)
/**
The macro that declares a section of debug source code.
If the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set,
then the source code specified by Expression is included in a module.
Otherwise, the source specified by Expression is not included in a module.
**/
#define DEBUG_CODE(Expression) \
DEBUG_CODE_BEGIN (); \
Expression \
DEBUG_CODE_END ()
/**
The macro that calls DebugClearMemory() to clear a buffer to a default value.
If the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set,
then this macro calls DebugClearMemory() passing in Address and Length.
@param Address The pointer to a buffer.
@param Length The number of bytes in the buffer to set.
**/
#define DEBUG_CLEAR_MEMORY(Address, Length) \
do { \
if (DebugClearMemoryEnabled ()) { \
DebugClearMemory (Address, Length); \
} \
} while (FALSE)
/**
Macro that calls DebugAssert() if the containing record does not have a
matching signature. If the signatures matches, then a pointer to the data
structure that contains a specified field of that data structure is returned.
This is a lightweight method hide information by placing a public data
structure inside a larger private data structure and using a pointer to the
public data structure to retrieve a pointer to the private data structure.
If MDEPKG_NDEBUG is defined or the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit
of PcdDebugProperyMask is clear, then this macro computes the offset, in bytes,
of the field specified by Field from the beginning of the data structure specified
by TYPE. This offset is subtracted from Record, and is used to return a pointer
to a data structure of the type specified by TYPE.
If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit
of PcdDebugProperyMask is set, then this macro computes the offset, in bytes,
of field specified by Field from the beginning of the data structure specified
by TYPE. This offset is subtracted from Record, and is used to compute a pointer
to a data structure of the type specified by TYPE. The Signature field of the
data structure specified by TYPE is compared to TestSignature. If the signatures
match, then a pointer to the pointer to a data structure of the type specified by
TYPE is returned. If the signatures do not match, then DebugAssert() is called
with a description of "CR has a bad signature" and Record is returned.
If the data type specified by TYPE does not contain the field specified by Field,
then the module will not compile.
If TYPE does not contain a field called Signature, then the module will not
compile.
@param Record The pointer to the field specified by Field within a data
structure of type TYPE.
@param TYPE The name of the data structure type to return This
data structure must contain the field specified by Field.
@param Field The name of the field in the data structure specified
by TYPE to which Record points.
@param TestSignature The 32-bit signature value to match.
**/
#if !defined(MDEPKG_NDEBUG)
#define CR(Record, TYPE, Field, TestSignature) \
(DebugAssertEnabled () && (BASE_CR (Record, TYPE, Field)->Signature != TestSignature)) ? \
(TYPE *) (_ASSERT (CR has Bad Signature), Record) : \
BASE_CR (Record, TYPE, Field)
#else
#define CR(Record, TYPE, Field, TestSignature) \
BASE_CR (Record, TYPE, Field)
#endif
#endif