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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
A hyperbolic cosine function is called on a value greater than 710.5, which may lead to numeric overflow.
| Class Name | cosh on High Number | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | reliability | ||||||||||||||||||||||||||||||
| Mnemonic | MATH.RANGE.COSH.TOOHIGH | ||||||||||||||||||||||||||||||
| 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="cosh on High Number" |
CodeSonar ships with library models that allow it to recognize functions such as libm cosh() that compute a hyperbolic cosine. If one of these functions is called with a value greater than 710.5 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 cosh on High Number warnings.
Japanese (ja)
#include <math.h>
double call_cosh(double ind){
double a = cosh(1); /* ok */
double b = cosh(710.5); /* ok */
double c = cosh((float)(7.105f*100)); /* 'cosh on High Number' warning issued here:
* because of floating point imprecision, 7.105f*100 > 710.5
*/
double d = cosh(711); /* 'cosh on High Number' warning issued here */
double e = cosh(ind); /* EVIDENCED ONLY: 'cosh on High Number' warning issued here
* if CodeSonar has evidence that a negative value is passed to
* call_cosh().
*/
return a+b+c+d+e;
}
The following configuration file parameters affect checks for this warning class.