casts.c revision 88c675f001e046b7264e2a2d4174dacf3781ce5f 
1// RUN: clang-cc -analyze -checker-cfref -analyzer-store=region --verify %s
2
3// Test if the 'storage' region gets properly initialized after it is cast to
4// 'struct sockaddr *'.
5
6#include <sys/socket.h>
7void f(int sock) {
8  struct sockaddr_storage storage;
9  struct sockaddr* sockaddr = (struct sockaddr*)&storage;
10  socklen_t addrlen = sizeof(storage);
11  getsockname(sock, sockaddr, &addrlen);
12  switch (sockaddr->sa_family) { // no-warning
13  default:
14    ;
15  }
16}
17
18struct s {
19  struct s *value;
20};
21
22// ElementRegion and cast-to pointee type may be of the same size:
23// 'struct s **' and 'int'.
24
25int f1(struct s **pval) {
26  int *tbool = ((void*)0);
27  struct s *t = *pval;
28  pval = &(t->value);
29  tbool = (int *)pval;
30  char c = (unsigned char) *tbool;
31}
32
33