1 #include <stdlib.h> 2 /* To be run with --freelist-vol=1000000 --freelist-big-blocks=50000 */ 3 static void jumped(void) 4 { 5 ; 6 } 7 int main(int argc, char *argv[]) 8 { 9 char *semi_big = NULL; 10 char *big = NULL; 11 char *small = NULL; 12 char *other_small = NULL; 13 int i; 14 int j; 15 16 /* Verify that access via a dangling pointer to a big block bigger than 17 the free list is found by memcheck (still on the free list). */ 18 semi_big = malloc (900000); 19 big = malloc (1000015); 20 free(semi_big); 21 free(big); 22 if (big[1000] > 0x0) jumped(); 23 if (semi_big[1000] > 0x0) jumped(); 24 25 /* Then verify that dangling pointers for small blocks is not hampered 26 by doing big alloc/free. */ 27 small = malloc (10000); 28 free(small); 29 30 /* We should still have a nice error msg for the semi_big 31 but not for the big block, which has been removed from the free list 32 with the malloc of small above. */ 33 if (big[2000] > 0x0) jumped(); 34 if (semi_big[2000] > 0x0) jumped(); 35 36 big = NULL; 37 38 { 39 big = malloc (1000015); 40 free(big); 41 if (small[10] > 0x0) jumped(); 42 43 /* Do not common up the below in a loop. We 44 want a different error/stack trace for each of 45 these. */ 46 if (big[10] > 0x0) jumped(); 47 } 48 49 50 for (i = 0; i < 100; i++) { 51 other_small = malloc(10000); 52 for (j = 0; j < 10000; j++) 53 other_small[j] = 0x1; 54 } 55 if (small[10] > 0x0) jumped(); 56 return 0; 57 } 58
