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| CodeSonar® 9.2p0 | CONFIDENTIAL | CodeSecure Inc |
A logarithm function is called with an argument whose value is negative.
| Class Name | Logarithm on Negative Value | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | reliability | |||||||||||||||||||||||||||||||||||||||||||||
| Mnemonic | MATH.DOMAIN.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 Negative Value" |
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 negative 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 Negative Value warnings.
Japanese (ja)
#include <math.h>
double call_log(double ind){
double a = log(1); /* ok */
double b = log(-1); /* 'Logarithm on Negative Value' warning issued here */
double c = log(ind); /* EVIDENCED ONLY: 'Logarithm on Negative Value' warning issued here
* if CodeSonar has evidence that a negative value 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/.