Re: [PATCH v3] xen: Add MISRA support to cppcheck make rule

[Bertrand Marquis <Bertrand.Marquis@xxxxxxx>]

Hi Stefano,

> On 22 Jun 2022, at 01:00, Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:
> 
> On Fri, 10 Jun 2022, Bertrand Marquis wrote:
>> cppcheck MISRA addon can be used to check for non compliance to some of
>> the MISRA standard rules.
>> 
>> Add a CPPCHECK_MISRA variable that can be set to "y" using make command
>> line to generate a cppcheck report including cppcheck misra checks.
>> 
>> When MISRA checking is enabled, a file with a text description suitable
>> for cppcheck misra addon is generated out of Xen documentation file
>> which lists the rules followed by Xen (docs/misra/rules.rst).
>> 
>> By default MISRA checking is turned off.
>> 
>> While adding cppcheck-misra files to gitignore, also fix the missing /
>> for htmlreport gitignore
>> 
>> Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
> 
> Hi Bertrand,
> 
> I tried this patch and I am a bit confused by the output
> cppcheck-misra.txt file that I get (appended.)
> 
> I can see that there are all the rules from docs/misra/rules.rst as it
> should be together with the one line summary, but there are also a bunch
> of additional rules not present in docs/misra/rules.rst. Starting from
> Rule 1.1 all the way to Rule 21.21. Is the expected?

To make cppcheck happy I need to give a text for all rules so the python script 
is generating a dummy sentence for not declared Misra rules to prevent cppcheck 
warnings. To make it simpler I just did it for 1 to 22 for main and sub numbers.

So yes this is expected.

Cheers
Bertrand


> 
> Cheers,
> 
> Stefano
> 
> 
> Appendix A Summary of guidelines
> Rule 2.1 Required
> All source files shall compile without any compilation errors (Misra rule 2.1)
> Rule 4.7 Required
> If a function returns error information then that error information shall be 
> tested (Misra rule 4.7)
> Rule 4.10 Required
> Precautions shall be taken in order to prevent the contents of a header file 
> being included more than once (Misra rule 4.10)
> Rule 4.14 Required
> The validity of values received from external sources shall be checked (Misra 
> rule 4.14)
> Rule 1.3 Required
> There shall be no occurrence of undefined or critical unspecified behaviour 
> (Misra rule 1.3)
> Rule 3.2 Required
> Line-splicing shall not be used in // comments (Misra rule 3.2)
> Rule 5.1 Required
> External identifiers shall be distinct (Misra rule 5.1)
> Rule 5.2 Required
> Identifiers declared in the same scope and name space shall be distinct 
> (Misra rule 5.2)
> Rule 5.3 Required
> An identifier declared in an inner scope shall not hide an identifier 
> declared in an outer scope (Misra rule 5.3)
> Rule 5.4 Required
> Macro identifiers shall be distinct (Misra rule 5.4)
> Rule 6.2 Required
> Single-bit named bit fields shall not be of a signed type (Misra rule 6.2)
> Rule 8.1 Required
> Types shall be explicitly specified (Misra rule 8.1)
> Rule 8.4 Required
> A compatible declaration shall be visible when an object or function with 
> external linkage is defined (Misra rule 8.4)
> Rule 8.5 Required
> An external object or function shall be declared once in one and only one 
> file (Misra rule 8.5)
> Rule 8.6 Required
> An identifier with external linkage shall have exactly one external 
> definition (Misra rule 8.6)
> Rule 8.8 Required
> The static storage class specifier shall be used in all declarations of 
> objects and functions that have internal linkage (Misra rule 8.8)
> Rule 8.10 Required
> An inline function shall be declared with the static storage class (Misra 
> rule 8.10)
> Rule 8.12 Required
> Within an enumerator list the value of an implicitly-specified enumeration 
> constant shall be unique (Misra rule 8.12)
> Rule 9.1 Mandatory
> The value of an object with automatic storage duration shall not be read 
> before it has been set (Misra rule 9.1)
> Rule 9.2 Required
> The initializer for an aggregate or union shall be enclosed in braces (Misra 
> rule 9.2)
> Rule 13.6 Mandatory
> The operand of the sizeof operator shall not contain any expression which has 
> potential side effects (Misra rule 13.6)
> Rule 14.1 Required
> A loop counter shall not have essentially floating type (Misra rule 14.1)
> Rule 16.7 Required
> A switch-expression shall not have essentially Boolean type (Misra rule 16.7)
> Rule 17.3 Mandatory
> A function shall not be declared implicitly (Misra rule 17.3)
> Rule 17.4 Mandatory
> All exit paths from a function with non-void return type shall have an 
> explicit return statement with an expression (Misra rule 17.4)
> Rule 20.7 Required
> Expressions resulting from the expansion of macro parameters shall be 
> enclosed in parentheses (Misra rule 20.7)
> Rule 20.13 Required
> A line whose first token is # shall be a valid preprocessing directive (Misra 
> rule 20.13)
> Rule 20.14 Required
> All #else #elif and #endif preprocessor directives shall reside in the same 
> file as the #if #ifdef or #ifndef directive to which they are related (Misra 
> rule 20.14)
> Rule 1.1
> No description for rule 1.1
> Rule 1.2
> No description for rule 1.2
> Rule 1.4
> No description for rule 1.4
> Rule 1.5
> No description for rule 1.5
> Rule 1.6
> No description for rule 1.6
> Rule 1.7
> No description for rule 1.7
> Rule 1.8
> No description for rule 1.8
> Rule 1.9
> No description for rule 1.9
> Rule 1.10
> No description for rule 1.10
> Rule 1.11
> No description for rule 1.11
> Rule 1.12
> No description for rule 1.12
> Rule 1.13
> No description for rule 1.13
> Rule 1.14
> No description for rule 1.14
> Rule 1.15
> No description for rule 1.15
> Rule 1.16
> No description for rule 1.16
> Rule 1.17
> No description for rule 1.17
> Rule 1.18
> No description for rule 1.18
> Rule 1.19
> No description for rule 1.19
> Rule 1.20
> No description for rule 1.20
> Rule 1.21
> No description for rule 1.21
> Rule 2.2
> No description for rule 2.2
> Rule 2.3
> No description for rule 2.3
> Rule 2.4
> No description for rule 2.4
> Rule 2.5
> No description for rule 2.5
> Rule 2.6
> No description for rule 2.6
> Rule 2.7
> No description for rule 2.7
> Rule 2.8
> No description for rule 2.8
> Rule 2.9
> No description for rule 2.9
> Rule 2.10
> No description for rule 2.10
> Rule 2.11
> No description for rule 2.11
> Rule 2.12
> No description for rule 2.12
> Rule 2.13
> No description for rule 2.13
> Rule 2.14
> No description for rule 2.14
> Rule 2.15
> No description for rule 2.15
> Rule 2.16
> No description for rule 2.16
> Rule 2.17
> No description for rule 2.17
> Rule 2.18
> No description for rule 2.18
> Rule 2.19
> No description for rule 2.19
> Rule 2.20
> No description for rule 2.20
> Rule 2.21
> No description for rule 2.21
> Rule 3.1
> No description for rule 3.1
> Rule 3.3
> No description for rule 3.3
> Rule 3.4
> No description for rule 3.4
> Rule 3.5
> No description for rule 3.5
> Rule 3.6
> No description for rule 3.6
> Rule 3.7
> No description for rule 3.7
> Rule 3.8
> No description for rule 3.8
> Rule 3.9
> No description for rule 3.9
> Rule 3.10
> No description for rule 3.10
> Rule 3.11
> No description for rule 3.11
> Rule 3.12
> No description for rule 3.12
> Rule 3.13
> No description for rule 3.13
> Rule 3.14
> No description for rule 3.14
> Rule 3.15
> No description for rule 3.15
> Rule 3.16
> No description for rule 3.16
> Rule 3.17
> No description for rule 3.17
> Rule 3.18
> No description for rule 3.18
> Rule 3.19
> No description for rule 3.19
> Rule 3.20
> No description for rule 3.20
> Rule 3.21
> No description for rule 3.21
> Rule 4.1
> No description for rule 4.1
> Rule 4.2
> No description for rule 4.2
> Rule 4.3
> No description for rule 4.3
> Rule 4.4
> No description for rule 4.4
> Rule 4.5
> No description for rule 4.5
> Rule 4.6
> No description for rule 4.6
> Rule 4.8
> No description for rule 4.8
> Rule 4.9
> No description for rule 4.9
> Rule 4.11
> No description for rule 4.11
> Rule 4.12
> No description for rule 4.12
> Rule 4.13
> No description for rule 4.13
> Rule 4.15
> No description for rule 4.15
> Rule 4.16
> No description for rule 4.16
> Rule 4.17
> No description for rule 4.17
> Rule 4.18
> No description for rule 4.18
> Rule 4.19
> No description for rule 4.19
> Rule 4.20
> No description for rule 4.20
> Rule 4.21
> No description for rule 4.21
> Rule 5.5
> No description for rule 5.5
> Rule 5.6
> No description for rule 5.6
> Rule 5.7
> No description for rule 5.7
> Rule 5.8
> No description for rule 5.8
> Rule 5.9
> No description for rule 5.9
> Rule 5.10
> No description for rule 5.10
> Rule 5.11
> No description for rule 5.11
> Rule 5.12
> No description for rule 5.12
> Rule 5.13
> No description for rule 5.13
> Rule 5.14
> No description for rule 5.14
> Rule 5.15
> No description for rule 5.15
> Rule 5.16
> No description for rule 5.16
> Rule 5.17
> No description for rule 5.17
> Rule 5.18
> No description for rule 5.18
> Rule 5.19
> No description for rule 5.19
> Rule 5.20
> No description for rule 5.20
> Rule 5.21
> No description for rule 5.21
> Rule 6.1
> No description for rule 6.1
> Rule 6.3
> No description for rule 6.3
> Rule 6.4
> No description for rule 6.4
> Rule 6.5
> No description for rule 6.5
> Rule 6.6
> No description for rule 6.6
> Rule 6.7
> No description for rule 6.7
> Rule 6.8
> No description for rule 6.8
> Rule 6.9
> No description for rule 6.9
> Rule 6.10
> No description for rule 6.10
> Rule 6.11
> No description for rule 6.11
> Rule 6.12
> No description for rule 6.12
> Rule 6.13
> No description for rule 6.13
> Rule 6.14
> No description for rule 6.14
> Rule 6.15
> No description for rule 6.15
> Rule 6.16
> No description for rule 6.16
> Rule 6.17
> No description for rule 6.17
> Rule 6.18
> No description for rule 6.18
> Rule 6.19
> No description for rule 6.19
> Rule 6.20
> No description for rule 6.20
> Rule 6.21
> No description for rule 6.21
> Rule 7.1
> No description for rule 7.1
> Rule 7.2
> No description for rule 7.2
> Rule 7.3
> No description for rule 7.3
> Rule 7.4
> No description for rule 7.4
> Rule 7.5
> No description for rule 7.5
> Rule 7.6
> No description for rule 7.6
> Rule 7.7
> No description for rule 7.7
> Rule 7.8
> No description for rule 7.8
> Rule 7.9
> No description for rule 7.9
> Rule 7.10
> No description for rule 7.10
> Rule 7.11
> No description for rule 7.11
> Rule 7.12
> No description for rule 7.12
> Rule 7.13
> No description for rule 7.13
> Rule 7.14
> No description for rule 7.14
> Rule 7.15
> No description for rule 7.15
> Rule 7.16
> No description for rule 7.16
> Rule 7.17
> No description for rule 7.17
> Rule 7.18
> No description for rule 7.18
> Rule 7.19
> No description for rule 7.19
> Rule 7.20
> No description for rule 7.20
> Rule 7.21
> No description for rule 7.21
> Rule 8.2
> No description for rule 8.2
> Rule 8.3
> No description for rule 8.3
> Rule 8.7
> No description for rule 8.7
> Rule 8.9
> No description for rule 8.9
> Rule 8.11
> No description for rule 8.11
> Rule 8.13
> No description for rule 8.13
> Rule 8.14
> No description for rule 8.14
> Rule 8.15
> No description for rule 8.15
> Rule 8.16
> No description for rule 8.16
> Rule 8.17
> No description for rule 8.17
> Rule 8.18
> No description for rule 8.18
> Rule 8.19
> No description for rule 8.19
> Rule 8.20
> No description for rule 8.20
> Rule 8.21
> No description for rule 8.21
> Rule 9.3
> No description for rule 9.3
> Rule 9.4
> No description for rule 9.4
> Rule 9.5
> No description for rule 9.5
> Rule 9.6
> No description for rule 9.6
> Rule 9.7
> No description for rule 9.7
> Rule 9.8
> No description for rule 9.8
> Rule 9.9
> No description for rule 9.9
> Rule 9.10
> No description for rule 9.10
> Rule 9.11
> No description for rule 9.11
> Rule 9.12
> No description for rule 9.12
> Rule 9.13
> No description for rule 9.13
> Rule 9.14
> No description for rule 9.14
> Rule 9.15
> No description for rule 9.15
> Rule 9.16
> No description for rule 9.16
> Rule 9.17
> No description for rule 9.17
> Rule 9.18
> No description for rule 9.18
> Rule 9.19
> No description for rule 9.19
> Rule 9.20
> No description for rule 9.20
> Rule 9.21
> No description for rule 9.21
> Rule 10.1
> No description for rule 10.1
> Rule 10.2
> No description for rule 10.2
> Rule 10.3
> No description for rule 10.3
> Rule 10.4
> No description for rule 10.4
> Rule 10.5
> No description for rule 10.5
> Rule 10.6
> No description for rule 10.6
> Rule 10.7
> No description for rule 10.7
> Rule 10.8
> No description for rule 10.8
> Rule 10.9
> No description for rule 10.9
> Rule 10.10
> No description for rule 10.10
> Rule 10.11
> No description for rule 10.11
> Rule 10.12
> No description for rule 10.12
> Rule 10.13
> No description for rule 10.13
> Rule 10.14
> No description for rule 10.14
> Rule 10.15
> No description for rule 10.15
> Rule 10.16
> No description for rule 10.16
> Rule 10.17
> No description for rule 10.17
> Rule 10.18
> No description for rule 10.18
> Rule 10.19
> No description for rule 10.19
> Rule 10.20
> No description for rule 10.20
> Rule 10.21
> No description for rule 10.21
> Rule 11.1
> No description for rule 11.1
> Rule 11.2
> No description for rule 11.2
> Rule 11.3
> No description for rule 11.3
> Rule 11.4
> No description for rule 11.4
> Rule 11.5
> No description for rule 11.5
> Rule 11.6
> No description for rule 11.6
> Rule 11.7
> No description for rule 11.7
> Rule 11.8
> No description for rule 11.8
> Rule 11.9
> No description for rule 11.9
> Rule 11.10
> No description for rule 11.10
> Rule 11.11
> No description for rule 11.11
> Rule 11.12
> No description for rule 11.12
> Rule 11.13
> No description for rule 11.13
> Rule 11.14
> No description for rule 11.14
> Rule 11.15
> No description for rule 11.15
> Rule 11.16
> No description for rule 11.16
> Rule 11.17
> No description for rule 11.17
> Rule 11.18
> No description for rule 11.18
> Rule 11.19
> No description for rule 11.19
> Rule 11.20
> No description for rule 11.20
> Rule 11.21
> No description for rule 11.21
> Rule 12.1
> No description for rule 12.1
> Rule 12.2
> No description for rule 12.2
> Rule 12.3
> No description for rule 12.3
> Rule 12.4
> No description for rule 12.4
> Rule 12.5
> No description for rule 12.5
> Rule 12.6
> No description for rule 12.6
> Rule 12.7
> No description for rule 12.7
> Rule 12.8
> No description for rule 12.8
> Rule 12.9
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> Rule 12.10
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> Rule 12.11
> No description for rule 12.11
> Rule 12.12
> No description for rule 12.12
> Rule 12.13
> No description for rule 12.13
> Rule 12.14
> No description for rule 12.14
> Rule 12.15
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> Rule 12.16
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> Rule 12.17
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> Rule 12.18
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> Rule 12.19
> No description for rule 12.19
> Rule 12.20
> No description for rule 12.20
> Rule 12.21
> No description for rule 12.21
> Rule 13.1
> No description for rule 13.1
> Rule 13.2
> No description for rule 13.2
> Rule 13.3
> No description for rule 13.3
> Rule 13.4
> No description for rule 13.4
> Rule 13.5
> No description for rule 13.5
> Rule 13.7
> No description for rule 13.7
> Rule 13.8
> No description for rule 13.8
> Rule 13.9
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> Rule 13.10
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> Rule 13.11
> No description for rule 13.11
> Rule 13.12
> No description for rule 13.12
> Rule 13.13
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> Rule 13.14
> No description for rule 13.14
> Rule 13.15
> No description for rule 13.15
> Rule 13.16
> No description for rule 13.16
> Rule 13.17
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> Rule 13.18
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> Rule 13.19
> No description for rule 13.19
> Rule 13.20
> No description for rule 13.20
> Rule 13.21
> No description for rule 13.21
> Rule 14.2
> No description for rule 14.2
> Rule 14.3
> No description for rule 14.3
> Rule 14.4
> No description for rule 14.4
> Rule 14.5
> No description for rule 14.5
> Rule 14.6
> No description for rule 14.6
> Rule 14.7
> No description for rule 14.7
> Rule 14.8
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> Rule 14.9
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> Rule 14.10
> No description for rule 14.10
> Rule 14.11
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> Rule 14.12
> No description for rule 14.12
> Rule 14.13
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> Rule 14.14
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> Rule 14.15
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> Rule 14.16
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> Rule 14.17
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> Rule 14.18
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> Rule 14.19
> No description for rule 14.19
> Rule 14.20
> No description for rule 14.20
> Rule 14.21
> No description for rule 14.21
> Rule 15.1
> No description for rule 15.1
> Rule 15.2
> No description for rule 15.2
> Rule 15.3
> No description for rule 15.3
> Rule 15.4
> No description for rule 15.4
> Rule 15.5
> No description for rule 15.5
> Rule 15.6
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> Rule 15.7
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> Rule 15.8
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> Rule 15.9
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> Rule 15.10
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> Rule 15.11
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> Rule 15.12
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> Rule 15.13
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> Rule 15.14
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> Rule 15.15
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> Rule 15.16
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> Rule 15.17
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> Rule 15.18
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> Rule 15.19
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> Rule 15.20
> No description for rule 15.20
> Rule 15.21
> No description for rule 15.21
> Rule 16.1
> No description for rule 16.1
> Rule 16.2
> No description for rule 16.2
> Rule 16.3
> No description for rule 16.3
> Rule 16.4
> No description for rule 16.4
> Rule 16.5
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> Rule 16.6
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> Rule 16.8
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> Rule 16.9
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> Rule 16.10
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> Rule 16.11
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> Rule 16.12
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> Rule 16.13
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> Rule 16.14
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> Rule 16.15
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> Rule 16.16
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> Rule 16.17
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> Rule 16.18
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> Rule 16.19
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> Rule 16.20
> No description for rule 16.20
> Rule 16.21
> No description for rule 16.21
> Rule 17.1
> No description for rule 17.1
> Rule 17.2
> No description for rule 17.2
> Rule 17.5
> No description for rule 17.5
> Rule 17.6
> No description for rule 17.6
> Rule 17.7
> No description for rule 17.7
> Rule 17.8
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> Rule 17.9
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> Rule 17.10
> No description for rule 17.10
> Rule 17.11
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> Rule 17.12
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> Rule 17.13
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> Rule 17.14
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> Rule 17.15
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> Rule 17.16
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> Rule 17.17
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> Rule 17.18
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> Rule 17.19
> No description for rule 17.19
> Rule 17.20
> No description for rule 17.20
> Rule 17.21
> No description for rule 17.21
> Rule 18.1
> No description for rule 18.1
> Rule 18.2
> No description for rule 18.2
> Rule 18.3
> No description for rule 18.3
> Rule 18.4
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> Rule 18.5
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> Rule 18.6
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> Rule 18.7
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> Rule 18.8
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> Rule 18.9
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> Rule 18.10
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> Rule 18.11
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> Rule 18.12
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> Rule 18.13
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> Rule 18.14
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> Rule 18.15
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> Rule 18.16
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> Rule 18.17
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> Rule 18.18
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> Rule 18.19
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> Rule 18.20
> No description for rule 18.20
> Rule 18.21
> No description for rule 18.21
> Rule 19.1
> No description for rule 19.1
> Rule 19.2
> No description for rule 19.2
> Rule 19.3
> No description for rule 19.3
> Rule 19.4
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> Rule 19.5
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> Rule 19.6
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> Rule 19.7
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> Rule 19.8
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> Rule 19.9
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> Rule 19.10
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> Rule 19.11
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> Rule 19.12
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> Rule 19.13
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> Rule 19.14
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> Rule 19.15
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> Rule 19.16
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> Rule 19.17
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> Rule 19.18
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> Rule 19.19
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> Rule 19.20
> No description for rule 19.20
> Rule 19.21
> No description for rule 19.21
> Rule 20.1
> No description for rule 20.1
> Rule 20.2
> No description for rule 20.2
> Rule 20.3
> No description for rule 20.3
> Rule 20.4
> No description for rule 20.4
> Rule 20.5
> No description for rule 20.5
> Rule 20.6
> No description for rule 20.6
> Rule 20.8
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> Rule 20.9
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> Rule 20.10
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> Rule 20.11
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> Rule 20.12
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> Rule 20.15
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> Rule 20.16
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> Rule 20.17
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> Rule 20.18
> No description for rule 20.18
> Rule 20.19
> No description for rule 20.19
> Rule 20.20
> No description for rule 20.20
> Rule 20.21
> No description for rule 20.21
> Rule 21.1
> No description for rule 21.1
> Rule 21.2
> No description for rule 21.2
> Rule 21.3
> No description for rule 21.3
> Rule 21.4
> No description for rule 21.4
> Rule 21.5
> No description for rule 21.5
> Rule 21.6
> No description for rule 21.6
> Rule 21.7
> No description for rule 21.7
> Rule 21.8
> No description for rule 21.8
> Rule 21.9
> No description for rule 21.9
> Rule 21.10
> No description for rule 21.10
> Rule 21.11
> No description for rule 21.11
> Rule 21.12
> No description for rule 21.12
> Rule 21.13
> No description for rule 21.13
> Rule 21.14
> No description for rule 21.14
> Rule 21.15
> No description for rule 21.15
> Rule 21.16
> No description for rule 21.16
> Rule 21.17
> No description for rule 21.17
> Rule 21.18
> No description for rule 21.18
> Rule 21.19
> No description for rule 21.19
> Rule 21.20
> No description for rule 21.20
> Rule 21.21
> No description for rule 21.21
> Appendix B