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97 lines
2.0 KiB
97 lines
2.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <signal.h> |
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#include <unistd.h> |
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#include <stdbool.h> |
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#include <string.h> |
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#include <time.h> |
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#include <sys/resource.h> |
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#include <bpf/bpf.h> |
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#include <bpf/libbpf.h> |
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struct pair { |
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long long val; |
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__u64 ip; |
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}; |
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static __u64 time_get_ns(void) |
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{ |
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struct timespec ts; |
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clock_gettime(CLOCK_MONOTONIC, &ts); |
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return ts.tv_sec * 1000000000ull + ts.tv_nsec; |
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} |
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static void print_old_objects(int fd) |
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{ |
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long long val = time_get_ns(); |
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__u64 key, next_key; |
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struct pair v; |
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key = write(1, "\e[1;1H\e[2J", 11); /* clear screen */ |
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key = -1; |
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while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { |
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bpf_map_lookup_elem(fd, &next_key, &v); |
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key = next_key; |
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if (val - v.val < 1000000000ll) |
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/* object was allocated more then 1 sec ago */ |
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continue; |
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printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n", |
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next_key, (val - v.val) / 1000000000ll, v.ip); |
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} |
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} |
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int main(int ac, char **argv) |
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{ |
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struct bpf_link *links[2]; |
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struct bpf_program *prog; |
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struct bpf_object *obj; |
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char filename[256]; |
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int map_fd, i, j = 0; |
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); |
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obj = bpf_object__open_file(filename, NULL); |
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if (libbpf_get_error(obj)) { |
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fprintf(stderr, "ERROR: opening BPF object file failed\n"); |
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return 0; |
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} |
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/* load BPF program */ |
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if (bpf_object__load(obj)) { |
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fprintf(stderr, "ERROR: loading BPF object file failed\n"); |
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goto cleanup; |
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} |
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map_fd = bpf_object__find_map_fd_by_name(obj, "my_map"); |
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if (map_fd < 0) { |
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fprintf(stderr, "ERROR: finding a map in obj file failed\n"); |
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goto cleanup; |
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} |
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bpf_object__for_each_program(prog, obj) { |
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links[j] = bpf_program__attach(prog); |
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if (libbpf_get_error(links[j])) { |
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fprintf(stderr, "ERROR: bpf_program__attach failed\n"); |
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links[j] = NULL; |
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goto cleanup; |
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} |
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j++; |
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} |
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for (i = 0; ; i++) { |
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print_old_objects(map_fd); |
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sleep(1); |
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} |
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cleanup: |
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for (j--; j >= 0; j--) |
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bpf_link__destroy(links[j]); |
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bpf_object__close(obj); |
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return 0; |
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}
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