profile: remove unnecessary bpf_probe_read call (iovisor#1822)

GaoHuijian · Jun 14, 2018 · 37f7fef · 37f7fef
1 parent 6972806
commit 37f7fef
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/tools/profile.py b/tools/profile.py
@@ -153,9 +153,7 @@ def stack_id_err(stack_id):
 
  if (key.kernel_stack_id >= 0) {
  // populate extras to fix the kernel stack
- struct pt_regs regs = {};
- bpf_probe_read(&regs, sizeof(regs), (void *)&ctx->regs);
- u64 ip = PT_REGS_IP(&regs);
+ u64 ip = PT_REGS_IP(&ctx->regs);
  u64 page_offset;
 
  // if ip isn't sane, leave key ips as zero for later checking