gcc/testsuite/c-c++-common/Wfree-nonheap-object-2.c

   1 /* PR middle-end/98166: bogus -Wmismatched-dealloc on user-defined allocator
   2    and inlining
   3    Verify that the allocator can be declared inline without a warning when
   4    it's associated with a standard deallocator.  Associating an inline
   5    deallocator with an allocator would cause false positives when the former
   6    calls a deallocation function the allocator isn't associated with, so
   7    that triggers a warning on declaration.
   8    { dg-do compile }
   9    { dg-options "-O2 -Wall" } */
  10
  11 __attribute__ ((malloc (__builtin_free)))
  12 inline int*
  13 alloc_int (int n)
  14 {
  15   return (int*)__builtin_malloc (n + sizeof (int));
  16 }
  17
  18 void test_nowarn_int (int n)
  19 {
  20   {
  21     int *p = alloc_int (n);
  22     __builtin_free (p);
  23   }
  24
  25   {
  26     int *p = alloc_int (n);
  27     __builtin_free (p + 1);   // { dg-warning "\\\[-Wfree-nonheap-object" }
  28   }
  29 }
  30
  31
  32 inline void
  33 dealloc_long (long *p)
  34 {
  35   __builtin_free (p);         // { dg-warning "'(__builtin_free|void __builtin_free\\(void\\*\\))' called on pointer '(p|<unknown>)' with nonzero offset" }
  36 }
  37
  38 __attribute__ ((malloc (dealloc_long)))
  39 long* alloc_long (int);       // { dg-warning "'malloc \\\(dealloc_long\\\)' attribute ignored with deallocation functions declared 'inline'" }
  40
  41 void test_nowarn_long (int n)
  42 {
  43   {
  44     long *p = alloc_long (n);
  45     dealloc_long (p);
  46   }
  47
  48   {
  49     long *p = alloc_long (n);
  50     dealloc_long (p + 1);
  51   }
  52 }