gcc/testsuite/gcc.dg/builtin-object-size-10.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-early_objsz-details" } */
   3 // { dg-skip-if "packed attribute missing for drone_source_packet" { "epiphany-*-*" } }
   4
   5 typedef struct {
   6     char sentinel[4];
   7     char data[0];
   8 } drone_packet;
   9 typedef struct {
  10     char type_str[16];
  11     char channel_hop;
  12 } drone_source_packet;
  13 drone_packet *
  14 foo(char *x)
  15 {
  16   drone_packet *dpkt = __builtin_malloc(sizeof(drone_packet)
  17                                         + sizeof(drone_source_packet));
  18   drone_source_packet *spkt = (drone_source_packet *) dpkt->data;
  19   __builtin___snprintf_chk (spkt->type_str, 16,
  20                             1, __builtin_object_size (spkt->type_str, 1),
  21                             "%s", x);
  22   return dpkt;
  23 }
  24
  25 /* { dg-final { scan-tree-dump "maximum object size 21" "early_objsz" } } */
  26 /* { dg-final { scan-tree-dump "maximum subobject size 16" "early_objsz" } } */