SonarSource Rules
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C

C static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C code

  • All rules 315
  • Vulnerability13
  • Bug76
  • Security Hotspot19
  • Code Smell207

  • Quick Fix 19
Filtered: 7 rules found
unpredictable
    Impact
      Clean code attribute
        1. Arguments evaluation order should not be relied on

           Bug
        2. Keywords shall not be used as macros identifiers

           Code Smell
        3. Dereferenced null pointers should not be bound to references

           Code Smell
        4. Header guards should be followed by a matching "#define" macro

           Code Smell
        5. "memcmp" should only be called with pointers to trivially copyable types with no padding

           Bug
        6. Stack allocated memory and non-owned memory should not be freed

           Bug
        7. The "<stdlib.h>" functions "bsearch" and "qsort" should not be used

           Bug

        Dereferenced null pointers should not be bound to references

        intentionality - complete
        maintainability
        Code Smell
        • unpredictable

        Why is this an issue?

        Dereferencing a null pointer has undefined behavior, and it is particularly harmful if a reference is then bound to the result, because a reference is assumed to refer to a valid object.

        Noncompliant code example

        void doSomething(A& a);
        void f() {
          A* a = nullptr;
          // ...
          doSomething(*a); // Noncompliant
        }
        
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          in your IDE
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          on-premise CI
          Developer Edition
          Available Since
          9.1

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