memcheck/tests/malloc_free_fill.c

   1
   2 /* Test for correct functioning of the --malloc-fill and --free-fill
   3    flags.  Needs --malloc-fill=0x55 and --free-fill=0x77. */
   4
   5 #include <stdio.h>
   6 #include <assert.h>
   7 #include <stdlib.h>
   8 #include "../memcheck.h"
   9
  10 int main ( void )
  11 {
  12   int *r, *oldr, *a;
  13
  14 #define TEST(x, exp_x, desc) \
  15   (void)VALGRIND_MAKE_MEM_DEFINED(&x, sizeof(int));     \
  16   if (x == exp_x) { \
  17      fprintf(stderr, "PASSED: " desc "\n"); \
  18   } else { \
  19      fprintf(stderr, "FAILED: " desc "\n"); \
  20   }
  21
  22   //-------------------------------------------------------------
  23   fprintf(stderr, "test simple malloc/free:\n");
  24
  25   a = malloc(10 * sizeof(int)); assert(a);
  26   TEST(a[4], 0x55555555, "malloc-filled");
  27
  28   free(a);
  29   TEST(a[5], 0x77777777, "  free-filled");
  30
  31   //-------------------------------------------------------------
  32   fprintf(stderr, "\ntest realloc-larger:\n");
  33
  34   r = malloc(30 * sizeof(int)); assert(r);
  35   TEST(r[25], 0x55555555, "malloc-filled");
  36
  37   /* Make larger */
  38   oldr = r;
  39   r = realloc(r, 40 * sizeof(int)); assert(r);
  40
  41   TEST(oldr[26], 0x77777777, "  free-filled");
  42   TEST(   r[35], 0x55555555, "malloc-filled");
  43
  44   free(r);
  45
  46   //-------------------------------------------------------------
  47   fprintf(stderr, "\ntest realloc-smaller:\n");
  48
  49   r = malloc(30 * sizeof(int)); assert(r);
  50   TEST(r[25], 0x55555555,   "malloc-filled");
  51
  52   /* Make smaller */
  53   oldr = r;
  54   r = realloc(r, 20 * sizeof(int)); assert(r);
  55
  56   TEST(oldr[26], 0x77777777, "  free-filled");
  57
  58   free(r);
  59
  60   //-------------------------------------------------------------
  61   fprintf(stderr, "\ntest calloc:\n");
  62   a = calloc(100, sizeof(int)); assert(r);
  63
  64   TEST(a[42], 0x00000000, "zero");
  65
  66   free(a);
  67
  68   return 0;
  69 }