#include /* To be run with --freelist-vol=1000000 --freelist-big-blocks=50000 */ static void jumped(void) { ; } int main(int argc, char *argv[]) { char *semi_big = NULL; char *big = NULL; char *small = NULL; char *other_small = NULL; int i; int j; /* Verify that access via a dangling pointer to a big block bigger than the free list is found by memcheck (still on the free list). */ semi_big = malloc (900000); big = malloc (1000015); free(semi_big); free(big); if (big[1000] > 0x0) jumped(); if (semi_big[1000] > 0x0) jumped(); /* Then verify that dangling pointers for small blocks is not hampered by doing big alloc/free. */ small = malloc (10000); free(small); /* We should still have a nice error msg for the semi_big but not for the big block, which has been removed from the free list with the malloc of small above. */ if (big[2000] > 0x0) jumped(); if (semi_big[2000] > 0x0) jumped(); big = NULL; { big = malloc (1000015); free(big); if (small[10] > 0x0) jumped(); /* Do not common up the below in a loop. We want a different error/stack trace for each of these. */ if (big[10] > 0x0) jumped(); } for (i = 0; i < 100; i++) { other_small = malloc(10000); for (j = 0; j < 10000; j++) other_small[j] = 0x1; } if (small[10] > 0x0) jumped(); return 0; }