gcc/testsuite/gcc.dg/torture/pr53703.c

   1 /* Reduced test case from PR53703.  Used to ICE.  */
   2
   3 /* { dg-do compile } */
   4 /* { dg-options "-w" } */
   5
   6 typedef long unsigned int size_t;
   7 typedef unsigned short int sa_family_t;
   8 struct sockaddr   {};
   9 typedef unsigned char __u8;
  10 typedef unsigned short __u16;
  11 typedef unsigned int __u32;
  12 struct nlmsghdr {
  13   __u32 nlmsg_len;
  14   __u16 nlmsg_type;
  15 };
  16 struct ifaddrmsg {
  17   __u8 ifa_family;
  18 };
  19 enum {
  20   IFA_ADDRESS,
  21   IFA_LOCAL,
  22 };
  23 enum {
  24   RTM_NEWLINK = 16,
  25   RTM_NEWADDR = 20,
  26 };
  27 struct rtattr {
  28   unsigned short rta_len;
  29   unsigned short rta_type;
  30 };
  31 struct ifaddrs {
  32   struct ifaddrs *ifa_next;
  33   unsigned short ifa_flags;
  34 };
  35 typedef unsigned short int uint16_t;
  36 typedef unsigned int uint32_t;
  37 struct nlmsg_list {
  38   struct nlmsg_list *nlm_next;
  39   int size;
  40 };
  41 struct rtmaddr_ifamap {
  42   void *address;
  43   void *local;
  44   int address_len;
  45   int local_len;
  46 };
  47 int ifa_sa_len (int, int);
  48 int usagi_getifaddrs (struct ifaddrs **ifap)
  49 {
  50   struct nlmsg_list *nlmsg_list, *nlmsg_end, *nlm;
  51   size_t dlen, xlen, nlen;
  52   int build;
  53   for (build = 0; build <= 1; build++)
  54     {
  55       struct ifaddrs *ifl = ((void *)0), *ifa = ((void *)0);
  56       struct nlmsghdr *nlh, *nlh0;
  57       uint16_t *ifflist = ((void *)0);
  58       struct rtmaddr_ifamap ifamap;
  59       for (nlm = nlmsg_list; nlm; nlm = nlm->nlm_next)
  60         {
  61           int nlmlen = nlm->size;
  62           for (nlh = nlh0;
  63                ((nlmlen) >= (int)sizeof(struct nlmsghdr)
  64                 && (nlh)->nlmsg_len >= sizeof(struct nlmsghdr)
  65                 && (nlh)->nlmsg_len <= (nlmlen));
  66                nlh = ((nlmlen) -= ( (((nlh)->nlmsg_len)+4U -1) & ~(4U -1) ),
  67                       (struct nlmsghdr*)(((char*)(nlh))
  68                                          + ( (((nlh)->nlmsg_len)+4U -1)
  69                                              & ~(4U -1) ))))
  70             {
  71               struct ifinfomsg *ifim = ((void *)0);
  72               struct ifaddrmsg *ifam = ((void *)0);
  73               struct rtattr *rta;
  74               sa_family_t nlm_family = 0;
  75               uint32_t nlm_scope = 0, nlm_index = 0;
  76               __builtin_memset (&ifamap, 0, sizeof (ifamap));
  77               switch (nlh->nlmsg_type)
  78                 {
  79                 case RTM_NEWLINK:
  80                   ifim = (struct ifinfomsg *)
  81                     ((void*)(((char*)nlh)
  82                              + ((0)+( ((((int)
  83                                          ( ((sizeof(struct nlmsghdr))+4U -1)
  84                                            & ~(4U -1) )))+4U -1)
  85                                       & ~(4U -1) ))));
  86                 case RTM_NEWADDR:
  87                   ifam = (struct ifaddrmsg *)
  88                     ((void*)(((char*)nlh)
  89                              + ((0)+( ((((int)
  90                                          ( ((sizeof(struct nlmsghdr))+4U -1)
  91                                            & ~(4U -1) )))+4U -1)
  92                                       & ~(4U -1) ))));
  93                   nlm_family = ifam->ifa_family;
  94                   if (build)
  95                     ifa->ifa_flags = ifflist[nlm_index];
  96                   break;
  97                 default:
  98                   continue;
  99                 }
 100               if (!build)
 101                 {
 102                   void *rtadata = ((void*)(((char*)(rta))
 103                                            + (( ((sizeof(struct rtattr))+4 -1)
 104                                                 & ~(4 -1) ) + (0))));
 105                   size_t rtapayload = ((int)((rta)->rta_len)
 106                                        - (( ((sizeof(struct rtattr))+4 -1)
 107                                             & ~(4 -1) ) + (0)));
 108                   switch (nlh->nlmsg_type)
 109                     {
 110                     case RTM_NEWLINK:
 111                       break;
 112                     case RTM_NEWADDR:
 113                       if (nlm_family == 17)
 114                         break;
 115                       switch (rta->rta_type)
 116                         {
 117                         case IFA_ADDRESS:
 118                           ifamap.address = rtadata;
 119                           ifamap.address_len = rtapayload;
 120                         case IFA_LOCAL:
 121                           ifamap.local = rtadata;
 122                         }
 123                     }
 124                 }
 125               if (nlh->nlmsg_type == RTM_NEWADDR && nlm_family != 17)
 126                 {
 127                   if (!ifamap.local)
 128                     {
 129                       ifamap.local = ifamap.address;
 130                       ifamap.local_len = ifamap.address_len;
 131                     }
 132                   if (!ifamap.address)
 133                     {
 134                       ifamap.address = ifamap.local;
 135                     }
 136                   if (ifamap.address_len != ifamap.local_len
 137                       || (ifamap.address != ((void *)0)
 138                           && __builtin_memcmp (ifamap.address, ifamap.local,
 139                                                ifamap.address_len)))
 140                     {
 141                       if (!build)
 142                         dlen += (((ifa_sa_len (nlm_family,
 143                                                ifamap.address_len))+4U -1)
 144                                  & ~(4U -1) );
 145                     }
 146                 }
 147             }
 148         }
 149     }
 150 }