// SPDX-License-Identifier: GPL-2.0-only/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com */#include <stdio.h>#include <stdlib.h>#include <signal.h>#include <unistd.h>#include <stdbool.h>#include <string.h>#include <time.h> #include <bpf/bpf.h>#include <bpf/libbpf.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", 11); /* clear screen */ 	key = -1;	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {		bpf_map_lookup_elem(fd, &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 bpf_link *links[2];	struct bpf_program *prog;	struct bpf_object *obj;	char filename[256];	int map_fd, j = 0; 	snprintf(filename, sizeof(filename), "%s.bpf.o", argv[0]);	obj = bpf_object__open_file(filename, NULL);	if (libbpf_get_error(obj)) {		fprintf(stderr, "ERROR: opening BPF object file failed\n");		return 0;	} 	/* load BPF program */	if (bpf_object__load(obj)) {		fprintf(stderr, "ERROR: loading BPF object file failed\n");		goto cleanup;	} 	map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");	if (map_fd < 0) {		fprintf(stderr, "ERROR: finding a map in obj file failed\n");		goto cleanup;	} 	bpf_object__for_each_program(prog, obj) {		links[j] = bpf_program__attach(prog);		if (libbpf_get_error(links[j])) {			fprintf(stderr, "ERROR: bpf_program__attach failed\n");			links[j] = NULL;			goto cleanup;		}		j++;	} 	while (1) {		print_old_objects(map_fd);		sleep(1);	} cleanup:	for (j--; j >= 0; j--)		bpf_link__destroy(links[j]); 	bpf_object__close(obj);	return 0;}