linux-imx

/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of version 2 of the GNU General Public

 * License as published by the Free Software Foundation.

 */

#include <stdio.h>

#include <stdlib.h>

#include <signal.h>

#include <unistd.h>

#include <stdbool.h>

#include <string.h>

#include <time.h>

#include <linux/bpf.h>

#include <sys/resource.h>

​

#include <bpf/bpf.h>

#include "bpf_load.h"

​

struct pair {

    long long val;

    __u64 ip;

};

​

static __u64 time_get_ns(void)

{

    struct timespec ts;

​

    clock_gettime(CLOCK_MONOTONIC, &ts);

    return ts.tv_sec * 1000000000ull + ts.tv_nsec;

}

​

static void print_old_objects(int fd)

{

    long long val = time_get_ns();

    __u64 key, next_key;

    struct pair v;

​

    key = write(1, "\e[1;1H\e[2J", 12); /* clear screen */

​

    key = -1;

    while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {

        bpf_map_lookup_elem(map_fd[0], &next_key, &v);

        key = next_key;

        if (val - v.val < 1000000000ll)

            /* object was allocated more then 1 sec ago */

            continue;

        printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",

               next_key, (val - v.val) / 1000000000ll, v.ip);

    }

}

​

int main(int ac, char **argv)

{

    struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};

    char filename[256];

    int i;

​

    snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);

​

    if (setrlimit(RLIMIT_MEMLOCK, &r)) {

        perror("setrlimit(RLIMIT_MEMLOCK, RLIM_INFINITY)");

        return 1;