save one bpf_probe_read()

weibang6liu · Feb 11, 2016 · d18657e · d18657e
1 parent 0a7f5ac
commit d18657e
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/tools/dcsnoop.py b/tools/dcsnoop.py
@@ -70,8 +70,9 @@
 {
  u32 pid = bpf_get_current_pid_tgid();
  struct entry_t entry = {};
- if (name->name) {
- bpf_probe_read(&entry.name, sizeof(entry.name), (void *)name->name);
+ const char *fname = name->name;
+ if (fname) {
+ bpf_probe_read(&entry.name, sizeof(entry.name), (void *)fname);
  }
  entrybypid.update(&pid, &entry);
  return 0;