libbpf-tools: update runqslower for libbpf 1.0

Switch to libbpf 1.0 mode and adapt libbpf API usage accordingly.

Signed-off-by: Andrii Nakryiko <[email protected]>

libbpf-tools/runqslower.c

@@ -146,7 +146,6 @@ int main(int argc, char **argv)
  .parser = parse_arg,
  .doc = argp_program_doc,
  };
- struct perf_buffer_opts pb_opts;
  struct perf_buffer *pb = NULL;
  struct runqslower_bpf *obj;
  int err;
@@ -155,14 +154,9 @@ int main(int argc, char **argv)
  if (err)
  return err;
 
+ libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
  libbpf_set_print(libbpf_print_fn);
 
- err = bump_memlock_rlimit();
- if (err) {
- fprintf(stderr, "failed to increase rlimit: %d\n", err);
- return 1;
- }
-
  obj = runqslower_bpf__open();
  if (!obj) {
  fprintf(stderr, "failed to open BPF object\n");
@@ -192,12 +186,10 @@ int main(int argc, char **argv)
  else
  printf("%-8s %-16s %-6s %14s\n", "TIME", "COMM", "TID", "LAT(us)");
 
- pb_opts.sample_cb = handle_event;
- pb_opts.lost_cb = handle_lost_events;
- pb = perf_buffer__new(bpf_map__fd(obj->maps.events), 64, &pb_opts);
- err = libbpf_get_error(pb);
- if (err) {
- pb = NULL;
+ pb = perf_buffer__new(bpf_map__fd(obj->maps.events), 64,
+ handle_event, handle_lost_events, NULL, NULL);
+ if (!pb) {
+ err = -errno;
  fprintf(stderr, "failed to open perf buffer: %d\n", err);
  goto cleanup;
  }
@@ -210,8 +202,8 @@ int main(int argc, char **argv)
 
  while (!exiting) {
  err = perf_buffer__poll(pb, 100);
- if (err < 0 && errno != EINTR) {
- fprintf(stderr, "error polling perf buffer: %s\n", strerror(errno));
+ if (err < 0 && err != -EINTR) {
+ fprintf(stderr, "error polling perf buffer: %s\n", strerror(-err));
  goto cleanup;
  }
  /* reset err to return 0 if exiting */