1 // RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core,alpha.unix,alpha.security.ArrayBound -analyzer-store=region -verify %s 2 3 //===----------------------------------------------------------------------===// 4 // This file tests cases where we should not flag out-of-bounds warnings. 5 //===----------------------------------------------------------------------===// 6 7 void f() { 8 long x = 0; 9 char *y = (char*) &x; 10 char c = y[0] + y[1] + y[2]; // no-warning 11 short *z = (short*) &x; 12 short s = z[0] + z[1]; // no-warning 13 } 14 15 void g() { 16 int a[2]; 17 char *b = (char*)a; 18 b[3] = 'c'; // no-warning 19 } 20 21 typedef typeof(sizeof(int)) size_t; 22 void *malloc(size_t); 23 void free(void *); 24 25 void field() { 26 struct vec { size_t len; int data[0]; }; 27 // FIXME: Not warn for this. 28 struct vec *a = malloc(sizeof(struct vec) + 10); // expected-warning {{Cast a region whose size is not a multiple of the destination type size}} 29 a->len = 10; 30 a->data[1] = 5; // no-warning 31 free(a); 32 } 33