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| CodeSonar® 9.2p0 | CONFIDENTIAL | CodeSecure Inc |
A logarithm function is called with an argument that evaluates to zero.
| Class Name | Logarithm on Zero | |||||||||||||||||||||||||||||||||||||||||||||
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| Significance | reliability | |||||||||||||||||||||||||||||||||||||||||||||
| Mnemonic | MATH.RANGE.LOG | |||||||||||||||||||||||||||||||||||||||||||||
| Categories |
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| Availability | Available for C and C++. |
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| Enabling | Checks for this warning class are enabled by
default. To disable them, add the following WARNING_FILTER rule to the
project configuration file.
WARNING_FILTER += discard class="Logarithm on Zero" |
CodeSonar ships with library models that allow it to recognize functions such as libm log2() that compute a logarithm. If one of these functions is called with zero in the input parameter position, a warning will be issued.
If you have created a custom library model for some function f() in terms of one of these existing models, calls to f() will also be capable of triggering Logarithm on Zero warnings.
Japanese (ja)
#include <math.h>
double call_log(double ind){
double a = log(1); /* ok */
double b = log(0); /* 'Logarithm on Zero' warning issued here */
double c = log(ind); /* EVIDENCED ONLY: 'Logarithm on Zero' warning issued here
* if CodeSonar has evidence that zero is passed to call_log(). */
return a+b+c;
}
The following configuration file parameters affect checks for this warning class.
To report problems with this documentation, please visit https://support.codesecure.com/.