casts.c revision 005f07b874ae559047f6189e2f770739695f6779 
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
22int f1(struct s **pval) {
23  int *tbool = ((void*)0);
24  struct s *t = *pval;
25  pval = &(t->value);
26  tbool = (int *)pval; // Should record the cast-to type here.
27  char c = (unsigned char) *tbool; // Should use cast-to type to create symbol.
28}
29
30void f2(const char *str) {
31 unsigned char ch, cl, *p;
32
33 p = (unsigned char *)str;
34 ch = *p++; // use cast-to type 'unsigned char' to create element region.
35 cl = *p++;
36 if(!cl)
37    cl = 'a';
38}
39