Disable ASLR

[ligurio]

Since you're seeing variations due to ASLR, the only relevant things this affects is trace region selection and table iteration order (with collectable non-string objects as keys). The latter is also affected by the recent security improvements for strings as keys. Are you 100% sure none of your code relies on a particular iteration order (which is not guaranteed by pairs)?

How to disable in a process (via):

#include <stdio.h>
#include <sys/personality.h>

int main(int argc, char **argv) {
    const int old_personality = personality(ADDR_NO_RANDOMIZE);
    if (!(old_personality & ADDR_NO_RANDOMIZE)) {
        const int new_personality = personality(ADDR_NO_RANDOMIZE);
        if (new_personality & ADDR_NO_RANDOMIZE) {
            execv(argv[0], argv);
        }
    }
    printf("&argc == %p\n", (void *) &argc);
}

See LJ#610, LJ#624 and personality(2).