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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
A pointer is NULL-checked when it must already have been dereferenced.
| Class Name | Null Test After Dereference | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Significance | reliability | |||||||||
| Mnemonic | LANG.STRUCT.NTAD | |||||||||
| 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="Null Test After Dereference" |
Japanese (ja)
void f(char c);
char lang_struct_ntad(char *q){
int a;
a = q[3];
f(a);
if (q){ /* 'Null Test After Dereference' warning issued here */
/* 'Redundant Condition' warning also issued
* - q cannot be NULL at this point: if it was NULL then the program would
* have crashed when it was dereferenced above.
*/
a = q[0];
}
return a;
}
The following configuration file parameters affect checks for this warning class.