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As described in-depth in guidelinerule [DCL34-C. Use volatile for data that cannot be cached], a {{volatile}}\-qualified variable "shall be evaluated strictly according to the rules of the abstract machine" \[[ISO/IEC 9899:1999|AA. Bibliography#ISO/IEC 9899-1999]\]. In other words, the {{volatile}} qualifier is used to instruct the compiler to not make caching optimizations about a variable. |
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Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
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DCL17-C | medium | probable | high | P4 | L3 |
Related Guidelines
ISO/IEC 9899:1999 Section 6.7.3, "Type qualifiers"
Bibliography
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\[[Eide and Regehr|AA. Bibliography#Eide and Regehr]\] "Volatiles are miscompiled, and what to do about it"
\[[ISO/IEC 9899:1999|AA. Bibliography#ISO/IEC 9899-1999]\] Section 6.7.3, "Type qualifiers" |
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DCL16-C. Use 'L', not 'l', to indicate a long value 02. Declarations and Initialization (DCL)