Increased allowed path name for USDT probes

Also added a warning if the length is exceeded
drcwr · Aug 30, 2017 · d9641be · d9641be
1 parent a91ec38
commit d9641be
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/cc/libbpf.c b/src/cc/libbpf.c
@@ -513,7 +513,7 @@ void * bpf_attach_uprobe(int progfd, enum bpf_probe_attach_type attach_type, con
 {
  int kfd;
  char buf[PATH_MAX];
- char new_name[128];
+ char new_name[256];
  struct perf_reader *reader = NULL;
  static char *event_type = "uprobe";
  int ns_fd = -1;
@@ -534,6 +534,7 @@ void * bpf_attach_uprobe(int progfd, enum bpf_probe_attach_type attach_type, con
  n = snprintf(buf, sizeof(buf), "%c:%ss/%s %s:0x%lx", attach_type==BPF_PROBE_ENTRY ? 'p' : 'r',
  event_type, new_name, binary_path, offset);
  if (n >= sizeof(buf)) {
+ fprintf(stderr, "Name too long for uprobe; ev_name (%s) is probably too long\n", ev_name);
  close(kfd);
  goto error;
  }