drd/tests/memory_allocation.c

   1 /**
   2  * @brief Repeatedly allocate and free memory. Tests whether drd really frees
   3  *        memory allocated by a client. See also
   4  *        http://bugs.kde.org/show_bug.cgi?id=161036.
   5  */
   6
   7 #include <assert.h>
   8 #include <stdlib.h>
   9
  10 int main()
  11 {
  12   int i;
  13   void* p;
  14
  15   for (i = 0; i < 100000; i++)
  16     free(malloc(40960));
  17
  18   for (i = 0; i < 100000; i++)
  19   {
  20     p = realloc(NULL, 40960);
  21     p = realloc(p, 50000);
  22     p = realloc(p, 40000);
  23     p = realloc(p, 0);
  24     /*
  25      * glibc returns a NULL pointer when the size argument passed to realloc()
  26      * is zero, while Darwin's C library returns a non-NULL pointer. Both are
  27      * allowed by POSIX.
  28      */
  29 #if defined(VGO_darwin)
  30     if (p)
  31       free(p);
  32 #else
  33     assert(! p);
  34 #endif
  35   }
  36
  37   return 0;
  38 }