SEI CERT C Coding Standard

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Operating System

Handling FP errors

Linux
Solaris 10
Mac OS X 10.5
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="ee90d8a16cd87915-772a3b81-4b9c4c91-bdea8247-3adbc16760063749b087e9a4"><ac:plain-text-body><![CDATA[Fedora Core 5

C99 FP functions - These functions are declared in fenv.h [2]
]]></ac:plain-text-body></ac:structured-macro>
Before fenv.h based functions were standardized; an alternative to using these C99/fenv function is using ieee_flags and ieee_handler  

<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="29baa1c741e65ec8-d45205a2-42654f3c-925bb4f7-4ed3d6c14394bbd00d29273d"><ac:plain-text-body><![CDATA[

Windows

Structured Exception Handling - user defined handler _fpieee_flt [3]
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The Floating point exceptions if they go undetected will cause one or more of these conditions - security vulnerability, lower program efficiency and generate inaccurate results. Most processors stall for significant duration (sometimes upto a second or even more on 32bit desktop processors) when an operation incur a NaN.

Recommendation

Severity

Likelihood

Remediation Cost

Priority

Level

FLP03-A

1 (low)

2 (probable)

2 (medium)

P4

L3

 

References

Wiki Markup
\[1\] IEEE standard for binary floating-point arithmetic
[http://ieeexplore.ieee.org/xpl/standardstoc.jsp?isnumber=1316]

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