SEI CERT C Coding Standard

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Failure to minimize scope could result in less reliable, readable, and reusable code.

Recommendation

Severity

Likelihood

Remediation Cost

Detectable

Repairable

Priority

Level

DCL19-C

Low

Unlikely

Medium

Yes

Yes

P2

P3

L3

Automated Detection

Tool

Version

Checker

Description

Astrée
Include Page
Astrée_V
Astrée_V

local-object-scope

global-object-scope

Partially checked
Axivion Bauhaus Suite

Include Page
Axivion Bauhaus Suite_V
Axivion Bauhaus Suite_V

CertC-DCL19
CodeSonar
Include Page
CodeSonar_V
CodeSonar_V

LANG.STRUCT.SCOPE.FILE
LANG.STRUCT.SCOPE.LOCAL

Scope could be file static
Scope could be local static

ECLAIR

Include Page
ECLAIR_V
ECLAIR_V

CC2.DCL19

Fully implemented

Helix QAC

Include Page
Helix QAC_V
Helix QAC_V

C1504, C1505, C1531, C1532, C3210, C3218


Klocwork
Include Page
Klocwork_V
Klocwork_V

MISRA.VAR.MIN.VIS
CXX.ID_VIS.GLOBAL_VARIABLE.EXTERN
CXX.ID_VIS.GLOBAL_VARIABLE.STATIC
CERT.TU.UNUSED.GLOBAL.DECL
CERT.STATIC.SINGLE.USE


LDRA tool suite
 
Include Page
LDRA_V
LDRA_V
25 D, 61 D, 40 SFully implemented
Parasoft C/C++test
9.5OPT-01Partially implementedPRQA QA-C Include PagePRQA QA-C_vPRQA QA-C_v1504, 1505, 1531, 1532, 3210, 3218
Include Page
Parasoft_V
Parasoft_V

CERT_C-DCL19-a

Declare variables as locally as possible

PC-lint Plus

Include Page
PC-lint Plus_V
PC-lint Plus_V

765, 9003

Partially supported

Polyspace Bug Finder

Include Page
Polyspace Bug Finder_V
Polyspace Bug Finder_V

CERT C: Rec. DCL19-C


Checks for:

  • Function or object declared without static specifier and referenced in only one file
  • Object defined beyond necessary scope

Rec. partially covered.

PVS-Studio

Include Page
PVS-Studio_V
PVS-Studio_V

V821
 

RuleChecker
Include Page
RuleChecker_V
RuleChecker_V

local-object-scope

global-object-scope

Partially checked

Related Vulnerabilities

Search for vulnerabilities resulting from the violation of this rule on the CERT website.

Related Guidelines

SEI CERT C++ Coding StandardVOID DCL07-CPP. Minimize the scope of variables and methods
MISRA C:2012Rule 8.9 (advisory)

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