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* [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
@ 2018-10-30  8:38 Eric Jin
  2018-10-30 10:43 ` Leif Lindholm
  2018-10-30 16:59 ` Supreeth Venkatesh
  0 siblings, 2 replies; 7+ messages in thread
From: Eric Jin @ 2018-10-30  8:38 UTC (permalink / raw)
  To: edk2-devel; +Cc: Supreeth Venkatesh, Jiaxin Wu

Make the HwErrRecVariableName as valid the string.
Ensure the HwErrRecVariable could be deleted before the test exit.

Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Eric Jin <eric.jin@intel.com>
---
 .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12 +++++++-----
 .../BlackBoxTest/VariableServicesBBTestMain.h                | 10 +++++++++-
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c
index d1064ce..df1bbe7 100644
--- a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c
+++ b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c
@@ -1,7 +1,7 @@
 /** @file
 
   Copyright 2006 - 2012 Unified EFI, Inc.<BR>
-  Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
   UINT64                RemainingVariableStorageSize;
   UINT64                MaximumVariableSize;
   
-  CHAR16                HwErrRecVariableName[13];
+  CHAR16                HwErrRecVariableName[HwErrRecVariableNameLength];
   CHAR16                HwErrRecVariable[] = L"This is a HwErrRec variable!";
   
   CHAR16                GetVariableName[MAX_BUFFER_SIZE];
@@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
   HwErrRecVariableName[0] = L'\0';
   SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
   Myitox( MaxNum, HwErrRecVariableName+8 );
+  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
   
   //
   // Set the new HwErrRec variable to the global variable
@@ -3036,8 +3037,8 @@ HardwareErrorRecordFuncTest (
   // Write reset record
   //
   RecoveryData[0] = 2;
-  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName, 12 );
-  RecoveryLib->WriteResetRecord( RecoveryLib, 13*sizeof(CHAR16)+2, RecoveryData );
+  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName, HwErrRecVariableNameLength-1 );
+  RecoveryLib->WriteResetRecord( RecoveryLib, HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
   
   //
   // Prompt the user about the cold reset and reset the system
@@ -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
   //
 step2:
   DataSize = 255;
-  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12 );
+  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
+  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), HwErrRecVariableNameLength-1 );
   Status = RT->GetVariable (
                         HwErrRecVariableName,
                         &gHwErrRecGuid,
diff --git a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h
index 051ae6f..b645b55 100644
--- a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h
+++ b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h
@@ -1,7 +1,7 @@
 /** @file
 
   Copyright 2006 - 2016 Unified EFI, Inc.<BR>
-  Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -125,6 +125,14 @@ Abstract:
 #endif
 
 //
+// The Variable Name of Hardware Error Record Variables 
+// defined in the UEFI Spec is HwErrRec####. For example,
+// HwErrRec0001, HwErrRec0002, HwErrRecF31A, etc. 
+// Consider the tail of string, the length is 13.
+//
+#define HwErrRecVariableNameLength 13
+
+//
 // Global Variables
 //
 
-- 
2.9.0.windows.1



^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
  2018-10-30  8:38 [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName Eric Jin
@ 2018-10-30 10:43 ` Leif Lindholm
  2018-10-30 16:59 ` Supreeth Venkatesh
  1 sibling, 0 replies; 7+ messages in thread
From: Leif Lindholm @ 2018-10-30 10:43 UTC (permalink / raw)
  To: Eric Jin; +Cc: edk2-devel, Jiaxin Wu

Hi Eric,

On Tue, Oct 30, 2018 at 04:38:36PM +0800, Eric Jin wrote:
> Make the HwErrRecVariableName as valid the string.
> Ensure the HwErrRecVariable could be deleted before the test exit.
> 
> Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>

(Sidenote - I don't see Supreeth actually on cc on this patch.)

> Cc: Jiaxin Wu <jiaxin.wu@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Eric Jin <eric.jin@intel.com>
> ---
>  .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12 +++++++-----
>  .../BlackBoxTest/VariableServicesBBTestMain.h                | 10 +++++++++-
>  2 files changed, 16 insertions(+), 6 deletions(-)

Could you follow the steps outlined in Laszlo's excellent guide
https://github.com/tianocore/tianocore.github.io/wiki/Laszlo's-unkempt-git-guide-for-edk2-contributors-and-maintainers#contrib-23
when generating the patches to send out?

For this specific patch, this would have made two major differences:
1) We would have seen the full path to files in the summary above,
   instead of the .../.
2) It would have ordered the files such that the .h would have been
   shown before the .c.

2 turns out to make a major difference when reviewing this particular
patch, because...

> diff --git a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c
> index d1064ce..df1bbe7 100644
> --- a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c
> +++ b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestFunction.c
> @@ -1,7 +1,7 @@
>  /** @file
>  
>    Copyright 2006 - 2012 Unified EFI, Inc.<BR>
> -  Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
> +  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
>  
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of the BSD License
> @@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
>    UINT64                RemainingVariableStorageSize;
>    UINT64                MaximumVariableSize;
>    
> -  CHAR16                HwErrRecVariableName[13];
> +  CHAR16                HwErrRecVariableName[HwErrRecVariableNameLength];

... the first thing I see when I look at this patch is
"Hang on, are we permitting runtime-sized arrays?"
This could have sent me off on a 15-90 minute task of
- triple-checking against the coding style document.
- search the mailing list (I recalled _some_ discussions around
  this recently, but that may have been for Linux, and variable-length
  arrays)
- search the edk2 codebase for precedent.
- testing with various toolchains whether they were happy compiling
  it, getting surprised when it worked in some of them, and then spent
  additional time figuring out why.

It could have, but it didn't. Because the patch is small enough that I
decided to read through it in its entirety before going off on
investigations.

More below.

>    CHAR16                HwErrRecVariable[] = L"This is a HwErrRec variable!";
>    
>    CHAR16                GetVariableName[MAX_BUFFER_SIZE];
> @@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
>    HwErrRecVariableName[0] = L'\0';
>    SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
>    Myitox( MaxNum, HwErrRecVariableName+8 );
> +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
>    
>    //
>    // Set the new HwErrRec variable to the global variable
> @@ -3036,8 +3037,8 @@ HardwareErrorRecordFuncTest (
>    // Write reset record
>    //
>    RecoveryData[0] = 2;
> -  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName, 12 );
> -  RecoveryLib->WriteResetRecord( RecoveryLib, 13*sizeof(CHAR16)+2, RecoveryData );
> +  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName, HwErrRecVariableNameLength-1 );
> +  RecoveryLib->WriteResetRecord( RecoveryLib, HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
>    
>    //
>    // Prompt the user about the cold reset and reset the system
> @@ -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
>    //
>  step2:
>    DataSize = 255;
> -  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12 );
> +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
> +  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), HwErrRecVariableNameLength-1 );
>    Status = RT->GetVariable (
>                          HwErrRecVariableName,
>                          &gHwErrRecGuid,
> diff --git a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h
> index 051ae6f..b645b55 100644
> --- a/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h
> +++ b/uefi-sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBoxTest/VariableServicesBBTestMain.h
> @@ -1,7 +1,7 @@
>  /** @file
>  
>    Copyright 2006 - 2016 Unified EFI, Inc.<BR>
> -  Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
> +  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
>  
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of the BSD License
> @@ -125,6 +125,14 @@ Abstract:
>  #endif
>  
>  //
> +// The Variable Name of Hardware Error Record Variables 
> +// defined in the UEFI Spec is HwErrRec####. For example,
> +// HwErrRec0001, HwErrRec0002, HwErrRecF31A, etc. 
> +// Consider the tail of string, the length is 13.
> +//
> +#define HwErrRecVariableNameLength 13

But then I get here, and I see that HwErrRecVariableNameLength is a
statically defined macro. At which point my comment on this patch
narrows down to:

Please name macros appropriately.
HwErrRecVariableNameLength is the name of a variable.
The appropriate name for this macro would be
HW_ERR_ERC_VARIABLE_NAME_LENGTH.

This all according to section 4.3.5 - Type and Macro Names, in the
coding standards specification.

Regards,

Leif


^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
  2018-10-30  8:38 [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName Eric Jin
  2018-10-30 10:43 ` Leif Lindholm
@ 2018-10-30 16:59 ` Supreeth Venkatesh
  2018-10-31  2:29   ` Jin, Eric
  1 sibling, 1 reply; 7+ messages in thread
From: Supreeth Venkatesh @ 2018-10-30 16:59 UTC (permalink / raw)
  To: Eric Jin, edk2-devel; +Cc: Jiaxin Wu, supreeth.venkatesh

Reviewed-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
If the below magic number comments(inline) are fixed before commit.

On Tue, 2018-10-30 at 16:38 +0800, Eric Jin wrote:
> Make the HwErrRecVariableName as valid the string.
> Ensure the HwErrRecVariable could be deleted before the test exit.
> 
> Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> Cc: Jiaxin Wu <jiaxin.wu@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Eric Jin <eric.jin@intel.com>
> ---
>  .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12
> +++++++-----
>  .../BlackBoxTest/VariableServicesBBTestMain.h                | 10
> +++++++++-
>  2 files changed, 16 insertions(+), 6 deletions(-)
> 
> diff --git a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c
> index d1064ce..df1bbe7 100644
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c
> @@ -1,7 +1,7 @@
>  /** @file
>  
>    Copyright 2006 - 2012 Unified EFI, Inc.<BR>
> -  Copyright (c) 2010 - 2012, Intel Corporation. All rights
> reserved.<BR>
> +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> reserved.<BR>
>  
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of
> the BSD License
> @@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
>    UINT64                RemainingVariableStorageSize;
>    UINT64                MaximumVariableSize;
>    
> -  CHAR16                HwErrRecVariableName[13];
> +  CHAR16                HwErrRecVariableName[HwErrRecVariableNameLen
> gth];
>    CHAR16                HwErrRecVariable[] = L"This is a HwErrRec
> variable!";
>    
>    CHAR16                GetVariableName[MAX_BUFFER_SIZE];
> @@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
>    HwErrRecVariableName[0] = L'\0';
>    SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
>    Myitox( MaxNum, HwErrRecVariableName+8 );
I understand this line is not part of this patch, but however can we
define "#define" for magic number 8, while we are touching this file.

> +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
>    
>    //
>    // Set the new HwErrRec variable to the global variable
> @@ -3036,8 +3037,8 @@ HardwareErrorRecordFuncTest (
>    // Write reset record
>    //
>    RecoveryData[0] = 2;
I understand this line is not part of this patch, but however can we
define "#define" for magic number 2, while we are touching this file.

> -  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName, 12
> );
> -  RecoveryLib->WriteResetRecord( RecoveryLib, 13*sizeof(CHAR16)+2,
> RecoveryData );
> +  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> HwErrRecVariableNameLength-1 );
"#define" for magic number 2

> +  RecoveryLib->WriteResetRecord( RecoveryLib,
> HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
"#define" for magic number 2

>    
>    //
>    // Prompt the user about the cold reset and reset the system
> @@ -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
>    //
>  step2:
>    DataSize = 255;
> -  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12
> );
> +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
> +  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 
"#define" for magic number 2

> HwErrRecVariableNameLength-1 );
>    Status = RT->GetVariable (
>                          HwErrRecVariableName,
>                          &gHwErrRecGuid,
> diff --git a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h
> index 051ae6f..b645b55 100644
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h
> @@ -1,7 +1,7 @@
>  /** @file
>  
>    Copyright 2006 - 2016 Unified EFI, Inc.<BR>
> -  Copyright (c) 2010 - 2016, Intel Corporation. All rights
> reserved.<BR>
> +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> reserved.<BR>
>  
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of
> the BSD License
> @@ -125,6 +125,14 @@ Abstract:
>  #endif
>  
>  //
> +// The Variable Name of Hardware Error Record Variables 
> +// defined in the UEFI Spec is HwErrRec####. For example,
> +// HwErrRec0001, HwErrRec0002, HwErrRecF31A, etc. 
> +// Consider the tail of string, the length is 13.
> +//
Good documentation.

> +#define HwErrRecVariableNameLength 13
> +
> +//
>  // Global Variables
>  //
>  



^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
  2018-10-30 16:59 ` Supreeth Venkatesh
@ 2018-10-31  2:29   ` Jin, Eric
  2018-10-31 16:24     ` Supreeth Venkatesh
  0 siblings, 1 reply; 7+ messages in thread
From: Jin, Eric @ 2018-10-31  2:29 UTC (permalink / raw)
  To: Supreeth Venkatesh, edk2-devel@lists.01.org; +Cc: Wu, Jiaxin, Jin, Eric

Hi Supreeth,

Thank for the comments.
I will re-create the patch to add the definition of the HwErrRecVariableNamePrefixLength(8) and HwErrRecVariableNameIndexLength(4).
	
There are two meanings to 2. To record the step number(2) used  by the recoverylib or address (byte[2]) to save the recovery data (HwErrRecVariableName)
It is not applicable macro definition and just code logic here. What is your opinion? 

Best Regards
Eric

-----Original Message-----
From: Supreeth Venkatesh <supreeth.venkatesh@arm.com> 
Sent: Wednesday, October 31, 2018 1:00 AM
To: Jin, Eric <eric.jin@intel.com>; edk2-devel@lists.01.org
Cc: Wu, Jiaxin <jiaxin.wu@intel.com>; supreeth.venkatesh@arm.com
Subject: Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName

Reviewed-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com> If the below magic number comments(inline) are fixed before commit.

On Tue, 2018-10-30 at 16:38 +0800, Eric Jin wrote:
> Make the HwErrRecVariableName as valid the string.
> Ensure the HwErrRecVariable could be deleted before the test exit.
> 
> Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> Cc: Jiaxin Wu <jiaxin.wu@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Eric Jin <eric.jin@intel.com>
> ---
>  .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12
> +++++++-----
>  .../BlackBoxTest/VariableServicesBBTestMain.h                | 10
> +++++++++-
>  2 files changed, 16 insertions(+), 6 deletions(-)
> 
> diff --git a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c b/uefi- 
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c
> index d1064ce..df1bbe7 100644
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestFunction.c
> @@ -1,7 +1,7 @@
>  /** @file
>  
>    Copyright 2006 - 2012 Unified EFI, Inc.<BR>
> -  Copyright (c) 2010 - 2012, Intel Corporation. All rights 
> reserved.<BR>
> +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> reserved.<BR>
>  
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of 
> the BSD License @@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
>    UINT64                RemainingVariableStorageSize;
>    UINT64                MaximumVariableSize;
>    
> -  CHAR16                HwErrRecVariableName[13];
> +  CHAR16                HwErrRecVariableName[HwErrRecVariableNameLen
> gth];
>    CHAR16                HwErrRecVariable[] = L"This is a HwErrRec
> variable!";
>    
>    CHAR16                GetVariableName[MAX_BUFFER_SIZE];
> @@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
>    HwErrRecVariableName[0] = L'\0';
>    SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
>    Myitox( MaxNum, HwErrRecVariableName+8 );
I understand this line is not part of this patch, but however can we define "#define" for magic number 8, while we are touching this file.

> +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
>    
>    //
>    // Set the new HwErrRec variable to the global variable @@ -3036,8 
> +3037,8 @@ HardwareErrorRecordFuncTest (
>    // Write reset record
>    //
>    RecoveryData[0] = 2;
I understand this line is not part of this patch, but however can we define "#define" for magic number 2, while we are touching this file.

> -  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName, 12 
> );
> -  RecoveryLib->WriteResetRecord( RecoveryLib, 13*sizeof(CHAR16)+2, 
> RecoveryData );
> +  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> HwErrRecVariableNameLength-1 );
"#define" for magic number 2

> +  RecoveryLib->WriteResetRecord( RecoveryLib,
> HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
"#define" for magic number 2

>    
>    //
>    // Prompt the user about the cold reset and reset the system @@ 
> -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
>    //
>  step2:
>    DataSize = 255;
> -  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12 );
> +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';  
> + SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2),
"#define" for magic number 2

> HwErrRecVariableNameLength-1 );
>    Status = RT->GetVariable (
>                          HwErrRecVariableName,
>                          &gHwErrRecGuid, diff --git a/uefi- 
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h b/uefi- 
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h
> index 051ae6f..b645b55 100644
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/BlackBo
> xTest/VariableServicesBBTestMain.h
> @@ -1,7 +1,7 @@
>  /** @file
>  
>    Copyright 2006 - 2016 Unified EFI, Inc.<BR>
> -  Copyright (c) 2010 - 2016, Intel Corporation. All rights 
> reserved.<BR>
> +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> reserved.<BR>
>  
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of 
> the BSD License @@ -125,6 +125,14 @@ Abstract:
>  #endif
>  
>  //
> +// The Variable Name of Hardware Error Record Variables // defined in 
> +the UEFI Spec is HwErrRec####. For example, // HwErrRec0001, 
> +HwErrRec0002, HwErrRecF31A, etc.
> +// Consider the tail of string, the length is 13.
> +//
Good documentation.

> +#define HwErrRecVariableNameLength 13
> +
> +//
>  // Global Variables
>  //
>  


^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
  2018-10-31  2:29   ` Jin, Eric
@ 2018-10-31 16:24     ` Supreeth Venkatesh
  2018-11-01  2:08       ` Jin, Eric
  0 siblings, 1 reply; 7+ messages in thread
From: Supreeth Venkatesh @ 2018-10-31 16:24 UTC (permalink / raw)
  To: Jin, Eric, edk2-devel@lists.01.org; +Cc: Wu, Jiaxin

On Wed, 2018-10-31 at 02:29 +0000, Jin, Eric wrote:
> Hi Supreeth,
Hi Eric,
> 
> Thank for the comments.
> I will re-create the patch to add the definition of the
> HwErrRecVariableNamePrefixLength(8) and
> HwErrRecVariableNameIndexLength(4).
Thank you.

> 	
> There are two meanings to 2. To record the step number(2) used  by
> the recoverylib or address (byte[2]) to save the recovery data
> (HwErrRecVariableName)
> It is not applicable macro definition and just code logic here. What
> is your opinion?
Array Index [2] - In general one iterates over an array, performing
some operation on each element, because one doesn't know how long the
array is and you can't just access it in a hardcoded manner.
Does index "2" have special meaning, since this index is chosen rather
than 0?

RecoveryData[0] = 2; 
Does only "2" have special meaning?

Looks like we can define (or similar)
#define SecondResetRecord 2 (or something more meaningful)

and for array
#define HwErrRecIndex 2 (or something more meaningful)

No strong opinion - but someone new who starts developing test on top
of this file will have a proper context and documentation to get going.

>  
> 
> Best Regards
> Eric
> 
> -----Original Message-----
> From: Supreeth Venkatesh <supreeth.venkatesh@arm.com> 
> Sent: Wednesday, October 31, 2018 1:00 AM
> To: Jin, Eric <eric.jin@intel.com>; edk2-devel@lists.01.org
> Cc: Wu, Jiaxin <jiaxin.wu@intel.com>; supreeth.venkatesh@arm.com
> Subject: Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail
> of the HwErrRecVariableName
> 
> Reviewed-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com> If the
> below magic number comments(inline) are fixed before commit.
> 
> On Tue, 2018-10-30 at 16:38 +0800, Eric Jin wrote:
> > Make the HwErrRecVariableName as valid the string.
> > Ensure the HwErrRecVariable could be deleted before the test exit.
> > 
> > Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> > Cc: Jiaxin Wu <jiaxin.wu@intel.com>
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Eric Jin <eric.jin@intel.com>
> > ---
> >  .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12
> > +++++++-----
> >  .../BlackBoxTest/VariableServicesBBTestMain.h                | 10
> > +++++++++-
> >  2 files changed, 16 insertions(+), 6 deletions(-)
> > 
> > diff --git a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c b/uefi- 
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > index d1064ce..df1bbe7 100644
> > --- a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > +++ b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > @@ -1,7 +1,7 @@
> >  /** @file
> >  
> >    Copyright 2006 - 2012 Unified EFI, Inc.<BR>
> > -  Copyright (c) 2010 - 2012, Intel Corporation. All rights 
> > reserved.<BR>
> > +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> > reserved.<BR>
> >  
> >    This program and the accompanying materials
> >    are licensed and made available under the terms and conditions
> > of 
> > the BSD License @@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
> >    UINT64                RemainingVariableStorageSize;
> >    UINT64                MaximumVariableSize;
> >    
> > -  CHAR16                HwErrRecVariableName[13];
> > +  CHAR16                HwErrRecVariableName[HwErrRecVariableNameL
> > en
> > gth];
> >    CHAR16                HwErrRecVariable[] = L"This is a HwErrRec
> > variable!";
> >    
> >    CHAR16                GetVariableName[MAX_BUFFER_SIZE];
> > @@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
> >    HwErrRecVariableName[0] = L'\0';
> >    SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
> >    Myitox( MaxNum, HwErrRecVariableName+8 );
> 
> I understand this line is not part of this patch, but however can we
> define "#define" for magic number 8, while we are touching this file.
> 
> > +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
> >    
> >    //
> >    // Set the new HwErrRec variable to the global variable @@
> > -3036,8 
> > +3037,8 @@ HardwareErrorRecordFuncTest (
> >    // Write reset record
> >    //
> >    RecoveryData[0] = 2;
> 
> I understand this line is not part of this patch, but however can we
> define "#define" for magic number 2, while we are touching this file.
> 
> > -  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> > 12 
> > );
> > -  RecoveryLib->WriteResetRecord( RecoveryLib,
> > 13*sizeof(CHAR16)+2, 
> > RecoveryData );
> > +  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> > HwErrRecVariableNameLength-1 );
> 
> "#define" for magic number 2
> 
> > +  RecoveryLib->WriteResetRecord( RecoveryLib,
> > HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
> 
> "#define" for magic number 2
> 
> >    
> >    //
> >    // Prompt the user about the cold reset and reset the system @@ 
> > -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
> >    //
> >  step2:
> >    DataSize = 255;
> > -  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12
> > );
> > +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';  
> > + SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2),
> 
> "#define" for magic number 2
> 
> > HwErrRecVariableNameLength-1 );
> >    Status = RT->GetVariable (
> >                          HwErrRecVariableName,
> >                          &gHwErrRecGuid, diff --git a/uefi- 
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h b/uefi- 
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > index 051ae6f..b645b55 100644
> > --- a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > +++ b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > @@ -1,7 +1,7 @@
> >  /** @file
> >  
> >    Copyright 2006 - 2016 Unified EFI, Inc.<BR>
> > -  Copyright (c) 2010 - 2016, Intel Corporation. All rights 
> > reserved.<BR>
> > +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> > reserved.<BR>
> >  
> >    This program and the accompanying materials
> >    are licensed and made available under the terms and conditions
> > of 
> > the BSD License @@ -125,6 +125,14 @@ Abstract:
> >  #endif
> >  
> >  //
> > +// The Variable Name of Hardware Error Record Variables // defined
> > in 
> > +the UEFI Spec is HwErrRec####. For example, // HwErrRec0001, 
> > +HwErrRec0002, HwErrRecF31A, etc.
> > +// Consider the tail of string, the length is 13.
> > +//
> 
> Good documentation.
> 
> > +#define HwErrRecVariableNameLength 13
> > +
> > +//
> >  // Global Variables
> >  //
> >  
> 
> 



^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
  2018-10-31 16:24     ` Supreeth Venkatesh
@ 2018-11-01  2:08       ` Jin, Eric
  2018-11-01 20:06         ` Supreeth Venkatesh
  0 siblings, 1 reply; 7+ messages in thread
From: Jin, Eric @ 2018-11-01  2:08 UTC (permalink / raw)
  To: Supreeth Venkatesh, edk2-devel@lists.01.org; +Cc: Wu, Jiaxin

Hi Supreeth,

Got your worry. It is difficult to define the clear/meaningful macro to express the implication and avoid the ambiguity in my eye.
How about to document the clear comments in the key process?  It is more help for reading by someone new and sustaining. 


Best Regards
Eric

-----Original Message-----
From: Supreeth Venkatesh <supreeth.venkatesh@arm.com> 
Sent: Thursday, November 1, 2018 12:24 AM
To: Jin, Eric <eric.jin@intel.com>; edk2-devel@lists.01.org
Cc: Wu, Jiaxin <jiaxin.wu@intel.com>
Subject: Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName

On Wed, 2018-10-31 at 02:29 +0000, Jin, Eric wrote:
> Hi Supreeth,
Hi Eric,
> 
> Thank for the comments.
> I will re-create the patch to add the definition of the
> HwErrRecVariableNamePrefixLength(8) and 
> HwErrRecVariableNameIndexLength(4).
Thank you.

> 	
> There are two meanings to 2. To record the step number(2) used  by the 
> recoverylib or address (byte[2]) to save the recovery data
> (HwErrRecVariableName)
> It is not applicable macro definition and just code logic here. What 
> is your opinion?
Array Index [2] - In general one iterates over an array, performing some operation on each element, because one doesn't know how long the array is and you can't just access it in a hardcoded manner.
Does index "2" have special meaning, since this index is chosen rather than 0?

RecoveryData[0] = 2;
Does only "2" have special meaning?

Looks like we can define (or similar)
#define SecondResetRecord 2 (or something more meaningful)

and for array
#define HwErrRecIndex 2 (or something more meaningful)

No strong opinion - but someone new who starts developing test on top of this file will have a proper context and documentation to get going.

>  
> 
> Best Regards
> Eric
> 
> -----Original Message-----
> From: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> Sent: Wednesday, October 31, 2018 1:00 AM
> To: Jin, Eric <eric.jin@intel.com>; edk2-devel@lists.01.org
> Cc: Wu, Jiaxin <jiaxin.wu@intel.com>; supreeth.venkatesh@arm.com
> Subject: Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail 
> of the HwErrRecVariableName
> 
> Reviewed-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com> If the 
> below magic number comments(inline) are fixed before commit.
> 
> On Tue, 2018-10-30 at 16:38 +0800, Eric Jin wrote:
> > Make the HwErrRecVariableName as valid the string.
> > Ensure the HwErrRecVariable could be deleted before the test exit.
> > 
> > Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> > Cc: Jiaxin Wu <jiaxin.wu@intel.com>
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Eric Jin <eric.jin@intel.com>
> > ---
> >  .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12
> > +++++++-----
> >  .../BlackBoxTest/VariableServicesBBTestMain.h                | 10
> > +++++++++-
> >  2 files changed, 16 insertions(+), 6 deletions(-)
> > 
> > diff --git a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c b/uefi- 
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > index d1064ce..df1bbe7 100644
> > --- a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > +++ b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > @@ -1,7 +1,7 @@
> >  /** @file
> >  
> >    Copyright 2006 - 2012 Unified EFI, Inc.<BR>
> > -  Copyright (c) 2010 - 2012, Intel Corporation. All rights 
> > reserved.<BR>
> > +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> > reserved.<BR>
> >  
> >    This program and the accompanying materials
> >    are licensed and made available under the terms and conditions of 
> > the BSD License @@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
> >    UINT64                RemainingVariableStorageSize;
> >    UINT64                MaximumVariableSize;
> >    
> > -  CHAR16                HwErrRecVariableName[13];
> > +  CHAR16                HwErrRecVariableName[HwErrRecVariableNameL
> > en
> > gth];
> >    CHAR16                HwErrRecVariable[] = L"This is a HwErrRec
> > variable!";
> >    
> >    CHAR16                GetVariableName[MAX_BUFFER_SIZE];
> > @@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
> >    HwErrRecVariableName[0] = L'\0';
> >    SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
> >    Myitox( MaxNum, HwErrRecVariableName+8 );
> 
> I understand this line is not part of this patch, but however can we 
> define "#define" for magic number 8, while we are touching this file.
> 
> > +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
> >    
> >    //
> >    // Set the new HwErrRec variable to the global variable @@
> > -3036,8
> > +3037,8 @@ HardwareErrorRecordFuncTest (
> >    // Write reset record
> >    //
> >    RecoveryData[0] = 2;
> 
> I understand this line is not part of this patch, but however can we 
> define "#define" for magic number 2, while we are touching this file.
> 
> > -  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> > 12
> > );
> > -  RecoveryLib->WriteResetRecord( RecoveryLib, 13*sizeof(CHAR16)+2, 
> > RecoveryData );
> > +  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> > HwErrRecVariableNameLength-1 );
> 
> "#define" for magic number 2
> 
> > +  RecoveryLib->WriteResetRecord( RecoveryLib,
> > HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
> 
> "#define" for magic number 2
> 
> >    
> >    //
> >    // Prompt the user about the cold reset and reset the system @@
> > -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
> >    //
> >  step2:
> >    DataSize = 255;
> > -  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12 
> > );
> > +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0'; 
> > + SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2),
> 
> "#define" for magic number 2
> 
> > HwErrRecVariableNameLength-1 );
> >    Status = RT->GetVariable (
> >                          HwErrRecVariableName,
> >                          &gHwErrRecGuid, diff --git a/uefi- 
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h b/uefi- 
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > index 051ae6f..b645b55 100644
> > --- a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > +++ b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > @@ -1,7 +1,7 @@
> >  /** @file
> >  
> >    Copyright 2006 - 2016 Unified EFI, Inc.<BR>
> > -  Copyright (c) 2010 - 2016, Intel Corporation. All rights 
> > reserved.<BR>
> > +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> > reserved.<BR>
> >  
> >    This program and the accompanying materials
> >    are licensed and made available under the terms and conditions of 
> > the BSD License @@ -125,6 +125,14 @@ Abstract:
> >  #endif
> >  
> >  //
> > +// The Variable Name of Hardware Error Record Variables // defined
> > in
> > +the UEFI Spec is HwErrRec####. For example, // HwErrRec0001, 
> > +HwErrRec0002, HwErrRecF31A, etc.
> > +// Consider the tail of string, the length is 13.
> > +//
> 
> Good documentation.
> 
> > +#define HwErrRecVariableNameLength 13
> > +
> > +//
> >  // Global Variables
> >  //
> >  
> 
> 


^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName
  2018-11-01  2:08       ` Jin, Eric
@ 2018-11-01 20:06         ` Supreeth Venkatesh
  0 siblings, 0 replies; 7+ messages in thread
From: Supreeth Venkatesh @ 2018-11-01 20:06 UTC (permalink / raw)
  To: Jin, Eric, edk2-devel@lists.01.org; +Cc: Wu, Jiaxin

Hi Eric,

I could not find any reference regarding "magic numbers" in edk2 C coding standards document.
So, I guess I am fine with documenting "magic numbers" with comments.

Thanks,
Supreeth

-----Original Message-----
From: Jin, Eric <eric.jin@intel.com>
Sent: Wednesday, October 31, 2018 9:09 PM
To: Supreeth Venkatesh <Supreeth.Venkatesh@arm.com>; edk2-devel@lists.01.org
Cc: Wu, Jiaxin <jiaxin.wu@intel.com>
Subject: RE: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName

Hi Supreeth,

Got your worry. It is difficult to define the clear/meaningful macro to express the implication and avoid the ambiguity in my eye.
How about to document the clear comments in the key process?  It is more help for reading by someone new and sustaining.


Best Regards
Eric

-----Original Message-----
From: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
Sent: Thursday, November 1, 2018 12:24 AM
To: Jin, Eric <eric.jin@intel.com>; edk2-devel@lists.01.org
Cc: Wu, Jiaxin <jiaxin.wu@intel.com>
Subject: Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName

On Wed, 2018-10-31 at 02:29 +0000, Jin, Eric wrote:
> Hi Supreeth,
Hi Eric,
>
> Thank for the comments.
> I will re-create the patch to add the definition of the
> HwErrRecVariableNamePrefixLength(8) and
> HwErrRecVariableNameIndexLength(4).
Thank you.

>
> There are two meanings to 2. To record the step number(2) used  by the
> recoverylib or address (byte[2]) to save the recovery data
> (HwErrRecVariableName)
> It is not applicable macro definition and just code logic here. What
> is your opinion?
Array Index [2] - In general one iterates over an array, performing some operation on each element, because one doesn't know how long the array is and you can't just access it in a hardcoded manner.
Does index "2" have special meaning, since this index is chosen rather than 0?

RecoveryData[0] = 2;
Does only "2" have special meaning?

Looks like we can define (or similar)
#define SecondResetRecord 2 (or something more meaningful)

and for array
#define HwErrRecIndex 2 (or something more meaningful)

No strong opinion - but someone new who starts developing test on top of this file will have a proper context and documentation to get going.

>
>
> Best Regards
> Eric
>
> -----Original Message-----
> From: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> Sent: Wednesday, October 31, 2018 1:00 AM
> To: Jin, Eric <eric.jin@intel.com>; edk2-devel@lists.01.org
> Cc: Wu, Jiaxin <jiaxin.wu@intel.com>; supreeth.venkatesh@arm.com
> Subject: Re: [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail
> of the HwErrRecVariableName
>
> Reviewed-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com> If the
> below magic number comments(inline) are fixed before commit.
>
> On Tue, 2018-10-30 at 16:38 +0800, Eric Jin wrote:
> > Make the HwErrRecVariableName as valid the string.
> > Ensure the HwErrRecVariable could be deleted before the test exit.
> >
> > Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> > Cc: Jiaxin Wu <jiaxin.wu@intel.com>
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Eric Jin <eric.jin@intel.com>
> > ---
> >  .../BlackBoxTest/VariableServicesBBTestFunction.c            | 12
> > +++++++-----
> >  .../BlackBoxTest/VariableServicesBBTestMain.h                | 10
> > +++++++++-
> >  2 files changed, 16 insertions(+), 6 deletions(-)
> >
> > diff --git a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > index d1064ce..df1bbe7 100644
> > --- a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > +++ b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestFunction.c
> > @@ -1,7 +1,7 @@
> >  /** @file
> >
> >    Copyright 2006 - 2012 Unified EFI, Inc.<BR>
> > -  Copyright (c) 2010 - 2012, Intel Corporation. All rights
> > reserved.<BR>
> > +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> > reserved.<BR>
> >
> >    This program and the accompanying materials
> >    are licensed and made available under the terms and conditions of
> > the BSD License @@ -2855,7 +2855,7 @@ HardwareErrorRecordFuncTest (
> >    UINT64                RemainingVariableStorageSize;
> >    UINT64                MaximumVariableSize;
> >
> > -  CHAR16                HwErrRecVariableName[13];
> > +  CHAR16                HwErrRecVariableName[HwErrRecVariableNameL
> > en
> > gth];
> >    CHAR16                HwErrRecVariable[] = L"This is a HwErrRec
> > variable!";
> >
> >    CHAR16                GetVariableName[MAX_BUFFER_SIZE];
> > @@ -3015,6 +3015,7 @@ HardwareErrorRecordFuncTest (
> >    HwErrRecVariableName[0] = L'\0';
> >    SctStrCat ( HwErrRecVariableName, L"HwErrRec" );
> >    Myitox( MaxNum, HwErrRecVariableName+8 );
>
> I understand this line is not part of this patch, but however can we
> define "#define" for magic number 8, while we are touching this file.
>
> > +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
> >
> >    //
> >    // Set the new HwErrRec variable to the global variable @@
> > -3036,8
> > +3037,8 @@ HardwareErrorRecordFuncTest (
> >    // Write reset record
> >    //
> >    RecoveryData[0] = 2;
>
> I understand this line is not part of this patch, but however can we
> define "#define" for magic number 2, while we are touching this file.
>
> > -  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> > 12
> > );
> > -  RecoveryLib->WriteResetRecord( RecoveryLib, 13*sizeof(CHAR16)+2,
> > RecoveryData );
> > +  SctStrnCpy ( (CHAR16*)(&RecoveryData[2]), HwErrRecVariableName,
> > HwErrRecVariableNameLength-1 );
>
> "#define" for magic number 2
>
> > +  RecoveryLib->WriteResetRecord( RecoveryLib,
> > HwErrRecVariableNameLength*sizeof(CHAR16)+2, RecoveryData );
>
> "#define" for magic number 2
>
> >
> >    //
> >    // Prompt the user about the cold reset and reset the system @@
> > -3052,7 +3053,8 @@ HardwareErrorRecordFuncTest (
> >    //
> >  step2:
> >    DataSize = 255;
> > -  SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2), 12
> > );
> > +  HwErrRecVariableName[HwErrRecVariableNameLength-1] = L'\0';
> > + SctStrnCpy ( HwErrRecVariableName, (CHAR16*)(RecoveryData+2),
>
> "#define" for magic number 2
>
> > HwErrRecVariableNameLength-1 );
> >    Status = RT->GetVariable (
> >                          HwErrRecVariableName,
> >                          &gHwErrRecGuid, diff --git a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > index 051ae6f..b645b55 100644
> > --- a/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > +++ b/uefi-
> > sct/SctPkg/TestCase/UEFI/EFI/RuntimeServices/VariableServices/Black
> > Bo
> > xTest/VariableServicesBBTestMain.h
> > @@ -1,7 +1,7 @@
> >  /** @file
> >
> >    Copyright 2006 - 2016 Unified EFI, Inc.<BR>
> > -  Copyright (c) 2010 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > +  Copyright (c) 2010 - 2018, Intel Corporation. All rights
> > reserved.<BR>
> >
> >    This program and the accompanying materials
> >    are licensed and made available under the terms and conditions of
> > the BSD License @@ -125,6 +125,14 @@ Abstract:
> >  #endif
> >
> >  //
> > +// The Variable Name of Hardware Error Record Variables // defined
> > in
> > +the UEFI Spec is HwErrRec####. For example, // HwErrRec0001,
> > +HwErrRec0002, HwErrRecF31A, etc.
> > +// Consider the tail of string, the length is 13.
> > +//
>
> Good documentation.
>
> > +#define HwErrRecVariableNameLength 13
> > +
> > +//
> >  // Global Variables
> >  //
> >
>
>

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^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2018-11-01 20:06 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-10-30  8:38 [edk2-test][Patch] uefi-sct/SctPkg:Assign 0 to the tail of the HwErrRecVariableName Eric Jin
2018-10-30 10:43 ` Leif Lindholm
2018-10-30 16:59 ` Supreeth Venkatesh
2018-10-31  2:29   ` Jin, Eric
2018-10-31 16:24     ` Supreeth Venkatesh
2018-11-01  2:08       ` Jin, Eric
2018-11-01 20:06         ` Supreeth Venkatesh

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