gcc/testsuite/c-c++-common/analyzer/leak-pr109059-1.c

   1 /* Reduced from haproxy-2.7.1's cfgparse.c.  */
   2
   3 typedef __SIZE_TYPE__ size_t;
   4
   5 extern void*
   6 calloc(size_t __nmemb, size_t __size)
   7   __attribute__((__nothrow__, __leaf__))
   8   __attribute__((__malloc__)) __attribute__((__alloc_size__(1, 2)));
   9
  10 struct list
  11 {
  12   struct list* n;
  13   struct list* p;
  14 };
  15
  16 struct cfg_postparser
  17 {
  18   struct list list;
  19   char* name;
  20   int (*func)();
  21 };
  22
  23 extern struct list postparsers;
  24
  25 int
  26 cfg_register_postparser(char* name, int (*func)())
  27 {
  28   struct cfg_postparser* cp;
  29
  30   cp = (struct cfg_postparser *) calloc(1, sizeof(*cp));
  31   if (!cp) {
  32     /* [...snip...] */
  33     return 0;
  34   }
  35   cp->name = name;
  36   cp->func = func;
  37
  38   ({
  39     (&cp->list)->p = (&postparsers)->p;
  40     (&cp->list)->p->n = (&postparsers)->p = (&cp->list);
  41     (&cp->list)->n = (&postparsers);
  42     (&cp->list);
  43   });
  44
  45   return 1; /* { dg-bogus "leak of 'cp'" } */
  46 }