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Difference between revisions of "CDT/Archive/designs/StaticAnalysis/CheckerIdeas"
< CDT | Archive | designs | StaticAnalysis
(→Checkers) |
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Line 33: | Line 33: | ||
:Quick fix | :Quick fix | ||
{ int x = 5; } | { int x = 5; } | ||
+ | ;Buffer over flow | ||
+ | : This code is unsafe | ||
+ | char x[10]; | ||
+ | char y[15]; | ||
+ | memcpy(x,y,20); | ||
== Links == | == Links == | ||
* http://www.aristeia.com/ddjpaper1.html | * http://www.aristeia.com/ddjpaper1.html |
Revision as of 10:51, 27 April 2010
This page is collection of ideas for checker that can be implemented for C/C++ Static Analysis in CDT (Codan). Feel free to add your own ideas or links.
Checkers
- Unused #include
#include <stdio.h> int main() { return 1; }
- Malloc called without sizeof consideration
int * arr = (int *)malloc(20); // should be malloc(20*sizeof(int))
- Assigned to itself
x = x;
- Result of comparison is constant
(x==x) (!x && x)
- Redundant comparison operations
(!(!x)) (x!=0 || 0!=x)
- Comparison is used on "boolean" values
0<x<3 !x>5
- Consequent re-assignment without usage (sub-case of Value is never used after assignment)
x=1; x=2;
- Value is never used after assignment
int x; x=23; return;
- Unused local variable
- local variable is not used in function
- Undeclared variable
- This is compiler error - catch early and have a quick fix so Ctrl-1 work like in java, I so like java quick fixes and code generation!
{ x = 5; }
- Quick fix
{ int x = 5; }
- Buffer over flow
- This code is unsafe
char x[10]; char y[15]; memcpy(x,y,20);