tools/syscount: Use lock_xadd to guarantee atomicity of addition oper…

…ations
e-dant · Aug 10, 2022 · 408fb40 · 408fb40
1 parent dda13ed
commit 408fb40
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/tools/syscount.py b/tools/syscount.py
@@ -177,14 +177,14 @@ def handle_errno(errstr):
 
  val = data.lookup_or_try_init(&key, &zero);
  if (val) {
- val->count++;
- val->total_ns += bpf_ktime_get_ns() - *start_ns;
+ lock_xadd(&val->count, 1);
+ lock_xadd(&val->total_ns, bpf_ktime_get_ns() - *start_ns);
  }
 #else
  u64 *val, zero = 0;
  val = data.lookup_or_try_init(&key, &zero);
  if (val) {
- ++(*val);
+ lock_xadd(val, 1);
  }
 #endif
  return 0;