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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
An attempt to free a null pointer.
| Class Name | Free Null Pointer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Significance | redundancy | |||||||||
| Mnemonic | ALLOC.FNP | |||||||||
| 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="Free Null Pointer" |
Free Null Pointer warnings can be triggered by any function treated as a deallocator by CodeSonar:
Japanese (ja)
#include <stdlib.h>
void free_null_pointer(char *p, char *q){
free((void*)0); /* 'Free Null Pointer' warning issued here */
free(malloc(10)); /* 'Free Null Pointer' warning issued here:
* malloc() may return NULL if system runs out of memory
*/
}
The following configuration file parameters affect checks for this warning class.