hardware breakpoint not called

[hagaisela]

Hi,
I am trying to detect a memory corruption using this library. I wrote a little test program to try and test it but my callback doesn't get called. what am I missing?

#include "hwbp_lib.h"

#include <stdio.h>
#include <stdbool.h>
#include <sys/syscall.h>      /* Definition of SYS_* constants */
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>

static void
handle_suspect_write(int dummy)
{
    printf("gotcha!!!\n");
}

int main(int arc, char** argv)
{
    uint64_t *dummy = malloc(sizeof(uint64_t));
    *dummy = 0;

    pid_t tid = syscall(__NR_gettid);

    bool bp_written = install_breakpoint(dummy, 0, HW_BREAKPOINT_WRITE_ACCESS, tid, handle_suspect_write);
    if (!bp_written)
    {
        printf("failed to install breakpoint\n");
        return -1;
    }

    *dummy = 1;
    usleep(1000000);
    free(dummy);
    return 0;
}