mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
28dbf861de
There is no functionality change in this patch. The common-purpose trace functions, including perf_event polling and ksym lookup, are moved from trace_output_user.c and bpf_load.c to selftests/bpf/trace_helpers.c so that these function can be reused later in selftests. Acked-by: Alexei Starovoitov <ast@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <linux/bpf.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <sys/resource.h>
|
|
#include "libbpf.h"
|
|
#include "bpf_load.h"
|
|
#include "trace_helpers.h"
|
|
|
|
int main(int ac, char **argv)
|
|
{
|
|
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
|
long key, next_key, value;
|
|
char filename[256];
|
|
struct ksym *sym;
|
|
int i;
|
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
|
|
setrlimit(RLIMIT_MEMLOCK, &r);
|
|
|
|
if (load_kallsyms()) {
|
|
printf("failed to process /proc/kallsyms\n");
|
|
return 2;
|
|
}
|
|
|
|
if (load_bpf_file(filename)) {
|
|
printf("%s", bpf_log_buf);
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
key = 0;
|
|
printf("kprobing funcs:");
|
|
while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
|
|
bpf_map_lookup_elem(map_fd[0], &next_key, &value);
|
|
assert(next_key == value);
|
|
sym = ksym_search(value);
|
|
printf(" %s", sym->name);
|
|
key = next_key;
|
|
}
|
|
if (key)
|
|
printf("\n");
|
|
key = 0;
|
|
while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0)
|
|
bpf_map_delete_elem(map_fd[0], &next_key);
|
|
sleep(1);
|
|
}
|
|
|
|
return 0;
|
|
}
|