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 usagi_getifaddrs (struct ifaddrs **ifap)
  48 {
  49   struct nlmsg_list *nlmsg_list, *nlmsg_end, *nlm;
  50   size_t dlen, xlen, nlen;
  51   int build;
  52   for (build = 0; build <= 1; build++)
  53     {
  54       struct ifaddrs *ifl = ((void *)0), *ifa = ((void *)0);
  55       struct nlmsghdr *nlh, *nlh0;
  56       uint16_t *ifflist = ((void *)0);
  57       struct rtmaddr_ifamap ifamap;
  58       for (nlm = nlmsg_list; nlm; nlm = nlm->nlm_next)
  59         {
  60           int nlmlen = nlm->size;
  61           for (nlh = nlh0;
  62                ((nlmlen) >= (int)sizeof(struct nlmsghdr)
  63                 && (nlh)->nlmsg_len >= sizeof(struct nlmsghdr)
  64                 && (nlh)->nlmsg_len <= (nlmlen));
  65                nlh = ((nlmlen) -= ( (((nlh)->nlmsg_len)+4U -1) & ~(4U -1) ),
  66                       (struct nlmsghdr*)(((char*)(nlh))
  67                                          + ( (((nlh)->nlmsg_len)+4U -1)
  68                                              & ~(4U -1) ))))
  69             {
  70               struct ifinfomsg *ifim = ((void *)0);
  71               struct ifaddrmsg *ifam = ((void *)0);
  72               struct rtattr *rta;
  73               sa_family_t nlm_family = 0;
  74               uint32_t nlm_scope = 0, nlm_index = 0;
  75               memset (&ifamap, 0, sizeof (ifamap));
  76               switch (nlh->nlmsg_type)
  77                 {
  78                 case RTM_NEWLINK:
  79                   ifim = (struct ifinfomsg *)
  80                     ((void*)(((char*)nlh)
  81                              + ((0)+( ((((int)
  82                                          ( ((sizeof(struct nlmsghdr))+4U -1)
  83                                            & ~(4U -1) )))+4U -1)
  84                                       & ~(4U -1) ))));
  85                 case RTM_NEWADDR:
  86                   ifam = (struct ifaddrmsg *)
  87                     ((void*)(((char*)nlh)
  88                              + ((0)+( ((((int)
  89                                          ( ((sizeof(struct nlmsghdr))+4U -1)
  90                                            & ~(4U -1) )))+4U -1)
  91                                       & ~(4U -1) ))));
  92                   nlm_family = ifam->ifa_family;
  93                   if (build)
  94                     ifa->ifa_flags = ifflist[nlm_index];
  95                   break;
  96                 default:
  97                   continue;
  98                 }
  99               if (!build)
 100                 {
 101                   void *rtadata = ((void*)(((char*)(rta))
 102                                            + (( ((sizeof(struct rtattr))+4 -1)
 103                                                 & ~(4 -1) ) + (0))));
 104                   size_t rtapayload = ((int)((rta)->rta_len)
 105                                        - (( ((sizeof(struct rtattr))+4 -1)
 106                                             & ~(4 -1) ) + (0)));
 107                   switch (nlh->nlmsg_type)
 108                     {
 109                     case RTM_NEWLINK:
 110                       break;
 111                     case RTM_NEWADDR:
 112                       if (nlm_family == 17)
 113                         break;
 114                       switch (rta->rta_type)
 115                         {
 116                         case IFA_ADDRESS:
 117                           ifamap.address = rtadata;
 118                           ifamap.address_len = rtapayload;
 119                         case IFA_LOCAL:
 120                           ifamap.local = rtadata;
 121                         }
 122                     }
 123                 }
 124               if (nlh->nlmsg_type == RTM_NEWADDR && nlm_family != 17)
 125                 {
 126                   if (!ifamap.local)
 127                     {
 128                       ifamap.local = ifamap.address;
 129                       ifamap.local_len = ifamap.address_len;
 130                     }
 131                   if (!ifamap.address)
 132                     {
 133                       ifamap.address = ifamap.local;
 134                     }
 135                   if (ifamap.address_len != ifamap.local_len
 136                       || (ifamap.address != ((void *)0)
 137                           && memcmp (ifamap.address, ifamap.local,
 138                                      ifamap.address_len)))
 139                     {
 140                       if (!build)
 141                         dlen += (((ifa_sa_len (nlm_family,
 142                                                ifamap.address_len))+4U -1)
 143                                  & ~(4U -1) );
 144                     }
 145                 }
 146             }
 147         }
 148     }
 149 }