1 // RUN: %clang_cc1 -analyze -analyzer-checker=core,unix,core.uninitialized -analyzer-store=region -verify -analyzer-config unix:Optimistic=true %s
2 typedef __typeof(sizeof(int)) size_t;
3 void *malloc(size_t);
4 void free(void *);
5 
6 char stackBased1 () {
7   char buf[2];
8   buf[0] = 'a';
9   return buf[1]; // expected-warning{{Undefined}}
10 }
11 
12 char stackBased2 () {
13   char buf[2];
14   buf[1] = 'a';
15   return buf[0]; // expected-warning{{Undefined}}
16 }
17 
18 // Exercise the conditional visitor. Radar://10105448
19 char stackBased3 (int *x) {
20   char buf[2];
21   int *y;
22   buf[0] = 'a';
23   if (!(y = x)) {
24     return buf[1]; // expected-warning{{Undefined}}
25   }
26   return buf[0];
27 }
28 
29 char heapBased1 () {
30   char *buf = malloc(2);
31   buf[0] = 'a';
32   char result = buf[1]; // expected-warning{{undefined}}
33   free(buf);
34   return result;
35 }
36 
37 char heapBased2 () {
38   char *buf = malloc(2);
39   buf[1] = 'a';
40   char result = buf[0]; // expected-warning{{undefined}}
41   free(buf);
42   return result;
43 }
44