clang/test/Analysis/invalid-deref.c

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core -verify %s
   2
   3 typedef unsigned uintptr_t;
   4
   5 void f1(void) {
   6   int *p;
   7   *p = 0; // expected-warning{{Dereference of undefined pointer value}}
   8 }
   9
  10 struct foo_struct {
  11   int x;
  12 };
  13
  14 int f2(void) {
  15   struct foo_struct *p;
  16
  17   return p->x++; // expected-warning{{Access to field 'x' results in a dereference of an undefined pointer value (loaded from variable 'p')}}
  18 }
  19
  20 int f3(void) {
  21   char *x;
  22   int i = 2;
  23
  24   return x[i + 1]; // expected-warning{{Array access (from variable 'x') results in an undefined pointer dereference}}
  25 }
  26
  27 int f3_b(void) {
  28   char *x;
  29   int i = 2;
  30
  31   return x[i + 1]++; // expected-warning{{Array access (from variable 'x') results in an undefined pointer dereference}}
  32 }