gcc/testsuite/gcc.dg/Warray-bounds-3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Warray-bounds" } */
   3 /* based on PR 31227 */
   4
   5 typedef __SIZE_TYPE__ size_t;
   6
   7 extern size_t strlen (const char *);
   8
   9 struct iovec
  10 {
  11   void *iov_base;
  12   size_t iov_len;
  13 };
  14
  15 struct S
  16 {
  17   const char *abday[7];
  18   const char *day[7];
  19   const char *abmon[12];
  20   const char *mon[12];
  21   const char *am_pm[2];
  22 };
  23
  24 extern void foo (size_t, struct iovec *);
  25
  26 void
  27 bar (struct S *time)
  28 {
  29   struct iovec iov[43];
  30   size_t cnt;
  31   iov[0].iov_base = (void *) "abc";
  32   iov[0].iov_len = 3;
  33
  34   iov[1].iov_base = (void *) "def";
  35   iov[1].iov_len = 3;
  36
  37   for (cnt = 0; cnt < 7; ++cnt)
  38     {
  39       iov[2 + cnt].iov_base = (void *) (time->abday[cnt] ?: "");
  40       iov[2 + cnt].iov_len = strlen (iov[2 + cnt].iov_base) + 1;
  41     }
  42
  43   for (; cnt < 14; ++cnt)
  44     {
  45       iov[2 + cnt].iov_base = (void *) (time->day[cnt - 7] ?: "");
  46       iov[2 + cnt].iov_len = strlen (iov[2 + cnt].iov_base) + 1;
  47     }
  48
  49   for (; cnt < 26; ++cnt)
  50     {
  51       iov[2 + cnt].iov_base = (void *) (time->abmon[cnt - 14] ?: "");
  52       iov[2 + cnt].iov_len = strlen (iov[2 + cnt].iov_base) + 1;
  53     }
  54
  55   for (; cnt < 38; ++cnt)
  56     {
  57       iov[2 + cnt].iov_base = (void *) (time->mon[cnt - 26] ?: "");
  58       iov[2 + cnt].iov_len = strlen (iov[2 + cnt].iov_base) + 1;
  59     }
  60
  61   for (; cnt < 40; ++cnt)
  62     {
  63       iov[2 + cnt].iov_base =  (void *) (time->am_pm[cnt - 38] ?: "");
  64       iov[2 + cnt].iov_len = strlen (iov[2 + cnt].iov_base) + 1;
  65     }
  66
  67   foo (2 + cnt, iov);
  68 }
  69
  70 struct malloc_chunk {
  71   long prev_size;
  72   long size;
  73   struct malloc_chunk* fd;
  74   struct malloc_chunk* bk;
  75 };
  76 typedef struct malloc_chunk* mchunkptr;
  77 struct malloc_state {
  78   mchunkptr        top;
  79   mchunkptr        last_remainder;
  80   mchunkptr        bins[128 * 2 - 2];
  81 };
  82 #define bin_at(m, i) \
  83   (mchunkptr) (((char *) &((m)->bins[((i) - 1) * 2]))                         \
  84              - __builtin_offsetof (struct malloc_chunk, fd))
  85
  86 void malloc_init_state(struct malloc_state *av)
  87 {
  88   int     i;
  89   mchunkptr bin;
  90
  91   for (i = 1; i < 128; ++i) {
  92     bin = bin_at(av,i);
  93     bin->fd = bin->bk = bin;
  94   }
  95 }
  96
  97 typedef unsigned short WCHAR;
  98 typedef WCHAR *LPWSTR;
  99
 100 static void g(LPWSTR dest, int len) {
 101      dest[len-1] = 0;
 102 }
 103
 104 void f() {
 105     WCHAR szPathW[260];
 106
 107     g(szPathW, 260);
 108 }