2 Provides services to print debug and assert messages to a debug output device.
4 The Debug library supports debug print and asserts based on a combination of macros and code.
5 The debug library can be turned on and off so that the debug code does not increase the size of an image.
7 Note that a reserved macro named MDEPKG_NDEBUG is introduced for the intention
8 of size reduction when compiler optimization is disabled. If MDEPKG_NDEBUG is
9 defined, then debug and assert related macros wrapped by it are the NULL implementations.
11 Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
12 SPDX-License-Identifier: BSD-2-Clause-Patent
16 #ifndef __DEBUG_LIB_H__
17 #define __DEBUG_LIB_H__
20 // Declare bits for PcdDebugPropertyMask
22 #define DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED 0x01
23 #define DEBUG_PROPERTY_DEBUG_PRINT_ENABLED 0x02
24 #define DEBUG_PROPERTY_DEBUG_CODE_ENABLED 0x04
25 #define DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED 0x08
26 #define DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED 0x10
27 #define DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED 0x20
30 // Declare bits for PcdDebugPrintErrorLevel and the ErrorLevel parameter of DebugPrint()
32 #define DEBUG_INIT 0x00000001 // Initialization
33 #define DEBUG_WARN 0x00000002 // Warnings
34 #define DEBUG_LOAD 0x00000004 // Load events
35 #define DEBUG_FS 0x00000008 // EFI File system
36 #define DEBUG_POOL 0x00000010 // Alloc & Free (pool)
37 #define DEBUG_PAGE 0x00000020 // Alloc & Free (page)
38 #define DEBUG_INFO 0x00000040 // Informational debug messages
39 #define DEBUG_DISPATCH 0x00000080 // PEI/DXE/SMM Dispatchers
40 #define DEBUG_VARIABLE 0x00000100 // Variable
41 #define DEBUG_BM 0x00000400 // Boot Manager
42 #define DEBUG_BLKIO 0x00001000 // BlkIo Driver
43 #define DEBUG_NET 0x00004000 // Network Io Driver
44 #define DEBUG_UNDI 0x00010000 // UNDI Driver
45 #define DEBUG_LOADFILE 0x00020000 // LoadFile
46 #define DEBUG_EVENT 0x00080000 // Event messages
47 #define DEBUG_GCD 0x00100000 // Global Coherency Database changes
48 #define DEBUG_CACHE 0x00200000 // Memory range cachability changes
49 #define DEBUG_VERBOSE 0x00400000 // Detailed debug messages that may
50 // significantly impact boot performance
51 #define DEBUG_ERROR 0x80000000 // Error
54 // Aliases of debug message mask bits
56 #define EFI_D_INIT DEBUG_INIT
57 #define EFI_D_WARN DEBUG_WARN
58 #define EFI_D_LOAD DEBUG_LOAD
59 #define EFI_D_FS DEBUG_FS
60 #define EFI_D_POOL DEBUG_POOL
61 #define EFI_D_PAGE DEBUG_PAGE
62 #define EFI_D_INFO DEBUG_INFO
63 #define EFI_D_DISPATCH DEBUG_DISPATCH
64 #define EFI_D_VARIABLE DEBUG_VARIABLE
65 #define EFI_D_BM DEBUG_BM
66 #define EFI_D_BLKIO DEBUG_BLKIO
67 #define EFI_D_NET DEBUG_NET
68 #define EFI_D_UNDI DEBUG_UNDI
69 #define EFI_D_LOADFILE DEBUG_LOADFILE
70 #define EFI_D_EVENT DEBUG_EVENT
71 #define EFI_D_VERBOSE DEBUG_VERBOSE
72 #define EFI_D_ERROR DEBUG_ERROR
75 Prints a debug message to the debug output device if the specified error level is enabled.
77 If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
78 GetDebugPrintErrorLevel (), then print the message specified by Format and the
79 associated variable argument list to the debug output device.
81 If Format is NULL, then ASSERT().
83 @param ErrorLevel The error level of the debug message.
84 @param Format The format string for the debug message to print.
85 @param ... The variable argument list whose contents are accessed
86 based on the format string specified by Format.
93 IN CONST CHAR8
*Format
,
99 Prints a debug message to the debug output device if the specified
100 error level is enabled.
102 If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
103 GetDebugPrintErrorLevel (), then print the message specified by Format and
104 the associated variable argument list to the debug output device.
106 If Format is NULL, then ASSERT().
108 @param ErrorLevel The error level of the debug message.
109 @param Format Format string for the debug message to print.
110 @param VaListMarker VA_LIST marker for the variable argument list.
117 IN CONST CHAR8
*Format
,
118 IN VA_LIST VaListMarker
123 Prints a debug message to the debug output device if the specified
124 error level is enabled.
125 This function use BASE_LIST which would provide a more compatible
126 service than VA_LIST.
128 If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
129 GetDebugPrintErrorLevel (), then print the message specified by Format and
130 the associated variable argument list to the debug output device.
132 If Format is NULL, then ASSERT().
134 @param ErrorLevel The error level of the debug message.
135 @param Format Format string for the debug message to print.
136 @param BaseListMarker BASE_LIST marker for the variable argument list.
143 IN CONST CHAR8
*Format
,
144 IN BASE_LIST BaseListMarker
149 Prints an assert message containing a filename, line number, and description.
150 This may be followed by a breakpoint or a dead loop.
152 Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"
153 to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of
154 PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if
155 DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then
156 CpuDeadLoop() is called. If neither of these bits are set, then this function
157 returns immediately after the message is printed to the debug output device.
158 DebugAssert() must actively prevent recursion. If DebugAssert() is called while
159 processing another DebugAssert(), then DebugAssert() must return immediately.
161 If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.
162 If Description is NULL, then a <Description> string of "(NULL) Description" is printed.
164 @param FileName The pointer to the name of the source file that generated the assert condition.
165 @param LineNumber The line number in the source file that generated the assert condition
166 @param Description The pointer to the description of the assert condition.
172 IN CONST CHAR8
*FileName
,
174 IN CONST CHAR8
*Description
179 Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.
181 This function fills Length bytes of Buffer with the value specified by
182 PcdDebugClearMemoryValue, and returns Buffer.
184 If Buffer is NULL, then ASSERT().
185 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
187 @param Buffer The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.
188 @param Length The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.
190 @return Buffer The pointer to the target buffer filled with PcdDebugClearMemoryValue.
202 Returns TRUE if ASSERT() macros are enabled.
204 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of
205 PcdDebugProperyMask is set. Otherwise, FALSE is returned.
207 @retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
208 @retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.
219 Returns TRUE if DEBUG() macros are enabled.
221 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of
222 PcdDebugProperyMask is set. Otherwise, FALSE is returned.
224 @retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
225 @retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.
236 Returns TRUE if DEBUG_CODE() macros are enabled.
238 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of
239 PcdDebugProperyMask is set. Otherwise, FALSE is returned.
241 @retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
242 @retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.
253 Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.
255 This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of
256 PcdDebugProperyMask is set. Otherwise, FALSE is returned.
258 @retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
259 @retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.
264 DebugClearMemoryEnabled (
269 Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.
271 This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.
273 @retval TRUE Current ErrorLevel is supported.
274 @retval FALSE Current ErrorLevel is not supported.
279 DebugPrintLevelEnabled (
280 IN CONST UINTN ErrorLevel
284 Internal worker macro that calls DebugAssert().
286 This macro calls DebugAssert(), passing in the filename, line number, and an
287 expression that evaluated to FALSE.
289 @param Expression Boolean expression that evaluated to FALSE
292 #define _ASSERT(Expression) DebugAssert (__FILE__, __LINE__, #Expression)
296 Internal worker macro that calls DebugPrint().
298 This macro calls DebugPrint() passing in the debug error level, a format
299 string, and a variable argument list.
300 __VA_ARGS__ is not supported by EBC compiler, Microsoft Visual Studio .NET 2003
301 and Microsoft Windows Server 2003 Driver Development Kit (Microsoft WINDDK) version 3790.1830.
303 @param Expression Expression containing an error level, a format string,
304 and a variable argument list based on the format string.
308 #if !defined(MDE_CPU_EBC) && (!defined (_MSC_VER) || _MSC_VER > 1400)
309 #define _DEBUG_PRINT(PrintLevel, ...) \
311 if (DebugPrintLevelEnabled (PrintLevel)) { \
312 DebugPrint (PrintLevel, ##__VA_ARGS__); \
315 #define _DEBUG(Expression) _DEBUG_PRINT Expression
317 #define _DEBUG(Expression) DebugPrint Expression
321 Macro that calls DebugAssert() if an expression evaluates to FALSE.
323 If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
324 bit of PcdDebugProperyMask is set, then this macro evaluates the Boolean
325 expression specified by Expression. If Expression evaluates to FALSE, then
326 DebugAssert() is called passing in the source filename, source line number,
329 @param Expression Boolean expression.
332 #if !defined(MDEPKG_NDEBUG)
333 #define ASSERT(Expression) \
335 if (DebugAssertEnabled ()) { \
336 if (!(Expression)) { \
337 _ASSERT (Expression); \
338 ANALYZER_UNREACHABLE (); \
343 #define ASSERT(Expression)
347 Macro that calls DebugPrint().
349 If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED
350 bit of PcdDebugProperyMask is set, then this macro passes Expression to
353 @param Expression Expression containing an error level, a format string,
354 and a variable argument list based on the format string.
358 #if !defined(MDEPKG_NDEBUG)
359 #define DEBUG(Expression) \
361 if (DebugPrintEnabled ()) { \
362 _DEBUG (Expression); \
366 #define DEBUG(Expression)
370 Macro that calls DebugAssert() if an EFI_STATUS evaluates to an error code.
372 If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
373 bit of PcdDebugProperyMask is set, then this macro evaluates the EFI_STATUS
374 value specified by StatusParameter. If StatusParameter is an error code,
375 then DebugAssert() is called passing in the source filename, source line
376 number, and StatusParameter.
378 @param StatusParameter EFI_STATUS value to evaluate.
381 #if !defined(MDEPKG_NDEBUG)
382 #define ASSERT_EFI_ERROR(StatusParameter) \
384 if (DebugAssertEnabled ()) { \
385 if (EFI_ERROR (StatusParameter)) { \
386 DEBUG ((EFI_D_ERROR, "\nASSERT_EFI_ERROR (Status = %r)\n", StatusParameter)); \
387 _ASSERT (!EFI_ERROR (StatusParameter)); \
392 #define ASSERT_EFI_ERROR(StatusParameter)
396 Macro that calls DebugAssert() if a RETURN_STATUS evaluates to an error code.
398 If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
399 bit of PcdDebugProperyMask is set, then this macro evaluates the
400 RETURN_STATUS value specified by StatusParameter. If StatusParameter is an
401 error code, then DebugAssert() is called passing in the source filename,
402 source line number, and StatusParameter.
404 @param StatusParameter RETURN_STATUS value to evaluate.
407 #if !defined(MDEPKG_NDEBUG)
408 #define ASSERT_RETURN_ERROR(StatusParameter) \
410 if (DebugAssertEnabled ()) { \
411 if (RETURN_ERROR (StatusParameter)) { \
412 DEBUG ((DEBUG_ERROR, "\nASSERT_RETURN_ERROR (Status = %r)\n", \
414 _ASSERT (!RETURN_ERROR (StatusParameter)); \
419 #define ASSERT_RETURN_ERROR(StatusParameter)
423 Macro that calls DebugAssert() if a protocol is already installed in the
426 If MDEPKG_NDEBUG is defined or the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit
427 of PcdDebugProperyMask is clear, then return.
429 If Handle is NULL, then a check is made to see if the protocol specified by Guid
430 is present on any handle in the handle database. If Handle is not NULL, then
431 a check is made to see if the protocol specified by Guid is present on the
432 handle specified by Handle. If the check finds the protocol, then DebugAssert()
433 is called passing in the source filename, source line number, and Guid.
435 If Guid is NULL, then ASSERT().
437 @param Handle The handle to check for the protocol. This is an optional
438 parameter that may be NULL. If it is NULL, then the entire
439 handle database is searched.
441 @param Guid The pointer to a protocol GUID.
444 #if !defined(MDEPKG_NDEBUG)
445 #define ASSERT_PROTOCOL_ALREADY_INSTALLED(Handle, Guid) \
447 if (DebugAssertEnabled ()) { \
449 ASSERT (Guid != NULL); \
450 if (Handle == NULL) { \
451 if (!EFI_ERROR (gBS->LocateProtocol ((EFI_GUID *)Guid, NULL, &Instance))) { \
452 _ASSERT (Guid already installed in database); \
455 if (!EFI_ERROR (gBS->HandleProtocol (Handle, (EFI_GUID *)Guid, &Instance))) { \
456 _ASSERT (Guid already installed on Handle); \
462 #define ASSERT_PROTOCOL_ALREADY_INSTALLED(Handle, Guid)
466 Macro that marks the beginning of debug source code.
468 If the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set,
469 then this macro marks the beginning of source code that is included in a module.
470 Otherwise, the source lines between DEBUG_CODE_BEGIN() and DEBUG_CODE_END()
471 are not included in a module.
474 #define DEBUG_CODE_BEGIN() do { if (DebugCodeEnabled ()) { UINT8 __DebugCodeLocal
478 The macro that marks the end of debug source code.
480 If the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set,
481 then this macro marks the end of source code that is included in a module.
482 Otherwise, the source lines between DEBUG_CODE_BEGIN() and DEBUG_CODE_END()
483 are not included in a module.
486 #define DEBUG_CODE_END() __DebugCodeLocal = 0; __DebugCodeLocal++; } } while (FALSE)
490 The macro that declares a section of debug source code.
492 If the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set,
493 then the source code specified by Expression is included in a module.
494 Otherwise, the source specified by Expression is not included in a module.
497 #define DEBUG_CODE(Expression) \
498 DEBUG_CODE_BEGIN (); \
504 The macro that calls DebugClearMemory() to clear a buffer to a default value.
506 If the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set,
507 then this macro calls DebugClearMemory() passing in Address and Length.
509 @param Address The pointer to a buffer.
510 @param Length The number of bytes in the buffer to set.
513 #define DEBUG_CLEAR_MEMORY(Address, Length) \
515 if (DebugClearMemoryEnabled ()) { \
516 DebugClearMemory (Address, Length); \
522 Macro that calls DebugAssert() if the containing record does not have a
523 matching signature. If the signatures matches, then a pointer to the data
524 structure that contains a specified field of that data structure is returned.
525 This is a lightweight method hide information by placing a public data
526 structure inside a larger private data structure and using a pointer to the
527 public data structure to retrieve a pointer to the private data structure.
529 If MDEPKG_NDEBUG is defined or the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit
530 of PcdDebugProperyMask is clear, then this macro computes the offset, in bytes,
531 of the field specified by Field from the beginning of the data structure specified
532 by TYPE. This offset is subtracted from Record, and is used to return a pointer
533 to a data structure of the type specified by TYPE.
535 If MDEPKG_NDEBUG is not defined and the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit
536 of PcdDebugProperyMask is set, then this macro computes the offset, in bytes,
537 of field specified by Field from the beginning of the data structure specified
538 by TYPE. This offset is subtracted from Record, and is used to compute a pointer
539 to a data structure of the type specified by TYPE. The Signature field of the
540 data structure specified by TYPE is compared to TestSignature. If the signatures
541 match, then a pointer to the pointer to a data structure of the type specified by
542 TYPE is returned. If the signatures do not match, then DebugAssert() is called
543 with a description of "CR has a bad signature" and Record is returned.
545 If the data type specified by TYPE does not contain the field specified by Field,
546 then the module will not compile.
548 If TYPE does not contain a field called Signature, then the module will not
551 @param Record The pointer to the field specified by Field within a data
552 structure of type TYPE.
554 @param TYPE The name of the data structure type to return This
555 data structure must contain the field specified by Field.
557 @param Field The name of the field in the data structure specified
558 by TYPE to which Record points.
560 @param TestSignature The 32-bit signature value to match.
563 #if !defined(MDEPKG_NDEBUG)
564 #define CR(Record, TYPE, Field, TestSignature) \
565 (DebugAssertEnabled () && (BASE_CR (Record, TYPE, Field)->Signature != TestSignature)) ? \
566 (TYPE *) (_ASSERT (CR has Bad Signature), Record) : \
567 BASE_CR (Record, TYPE, Field)
569 #define CR(Record, TYPE, Field, TestSignature) \
570 BASE_CR (Record, TYPE, Field)