memcheck/tests/malloc2.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 /* The original test driver machinery. */
   6 #define N_TEST_TRANSACTIONS 500
   7 #define N_TEST_ARR 2000
   8
   9 #define M_TEST_MALLOC 1000
  10
  11 void* test_arr[N_TEST_ARR];
  12
  13 int main ( int argc, char** argv )
  14 {
  15    int i, j, k, nbytes;
  16    unsigned char* chp;
  17
  18    for (i = 0; i < N_TEST_ARR; i++)
  19       test_arr[i] = NULL;
  20
  21    for (i = 0; i < N_TEST_TRANSACTIONS; i++) {
  22       j = random() % N_TEST_ARR;
  23       if (test_arr[j]) {
  24          free(test_arr[j]);
  25          test_arr[j] = NULL;
  26       } else {
  27          nbytes = 1 + random() % M_TEST_MALLOC;
  28          if (random()%64 == 32)
  29             nbytes *= 17;
  30          test_arr[j] = malloc( nbytes );
  31          chp = test_arr[j];
  32          for (k = 1; k < nbytes; k++)
  33             chp[k] = (unsigned char)(k + 99);
  34       }
  35    }
  36
  37    for (i = 0; test_arr[i] == NULL; i++) ;
  38    free(test_arr[i]);
  39    ((char*)test_arr[i])[0] = 0;
  40
  41    for (i = 0; i < N_TEST_ARR; i++) {
  42       if (test_arr[i]) {
  43          free(test_arr[i]);
  44          test_arr[i] = NULL;
  45       }
  46    }
  47
  48    return 0;
  49 }