casts.c revision 959922647e5061fc20f983d0e85e3f7fb8421457 
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/types.h>
7#include <sys/socket.h>
8
9void f(int sock) {
10  struct sockaddr_storage storage;
11  struct sockaddr* sockaddr = (struct sockaddr*)&storage;
12  socklen_t addrlen = sizeof(storage);
13  getsockname(sock, sockaddr, &addrlen);
14  switch (sockaddr->sa_family) { // no-warning
15  default:
16    ;
17  }
18}
19
20struct s {
21  struct s *value;
22};
23
24void f1(struct s **pval) {
25  int *tbool = ((void*)0);
26  struct s *t = *pval;
27  pval = &(t->value);
28  tbool = (int *)pval; // Should record the cast-to type here.
29  char c = (unsigned char) *tbool; // Should use cast-to type to create symbol.
30  if (*tbool == -1)
31    3;
32}
33
34void f2(const char *str) {
35 unsigned char ch, cl, *p;
36
37 p = (unsigned char *)str;
38 ch = *p++; // use cast-to type 'unsigned char' to create element region.
39 cl = *p++;
40 if(!cl)
41    cl = 'a';
42}
43