70 строки
1.4 KiB
C
70 строки
1.4 KiB
C
/* 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 "libbpf.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)
|
|
{
|
|
char filename[256];
|
|
int i;
|
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
|
|
|
|
if (load_bpf_file(filename)) {
|
|
printf("%s", bpf_log_buf);
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0; ; i++) {
|
|
print_old_objects(map_fd[1]);
|
|
sleep(1);
|
|
}
|
|
|
|
return 0;
|
|
}
|