bcc: Remove bpf_probe_read_user availability checks on compile time

If wrong kernel-headers are installed, then this can provide false result for probe read selection. Instead look for only kallsyms. Signed-off-by: Sumanth Korikkar <[email protected]>
weibang6liu · May 25, 2020 · 0b2f4d0 · 0b2f4d0
1 parent 275abc9
commit 0b2f4d0
Showing 1 changed file with 0 additions and 4 deletions.
diff --git a/src/cc/frontends/clang/b_frontend_action.cc b/src/cc/frontends/clang/b_frontend_action.cc
@@ -110,9 +110,6 @@ static std::string check_bpf_probe_read_user(llvm::StringRef probe,
  bool& overlap_addr) {
  if (probe.str() == "bpf_probe_read_user" ||
  probe.str() == "bpf_probe_read_user_str") {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 5, 0)
- return probe.str();
-#else
  // Check for probe_user symbols in backported kernel before fallback
  void *resolver = get_symbol_resolver();
  uint64_t addr = 0;
@@ -132,7 +129,6 @@ static std::string check_bpf_probe_read_user(llvm::StringRef probe,
  return "bpf_probe_read";
  else
  return "bpf_probe_read_str";
-#endif
  }
  return "";
 }