enable -g by default for llvm 9

This patch introduced two changes so that BTF is available to bcc starting from LLVM 9: . -g to enable BTF generation in LLVM . ProcessAllSections for RuntimeDyld so BTF is available to bcc The bcc will then be able to post process and load BTF into the kernel. Signed-off-by: Yonghong Song <[email protected]>
yingtaojuzi · Feb 8, 2019 · 89bf6f7 · 89bf6f7
1 parent de641d4
commit 89bf6f7
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diff --git a/src/cc/bpf_module.cc b/src/cc/bpf_module.cc
@@ -239,8 +239,12 @@ int BPFModule::finalize() {
  return -1;
  }
 
+#if LLVM_MAJOR_VERSION >= 9
+ engine_->setProcessAllSections(true);
+#else
  if (flags_ & DEBUG_SOURCE)
  engine_->setProcessAllSections(true);
+#endif
 
  if (int rc = run_pass_manager(*mod))
  return rc;

diff --git a/src/cc/frontends/clang/loader.cc b/src/cc/frontends/clang/loader.cc
@@ -172,8 +172,12 @@ int ClangLoader::parse(unique_ptr<llvm::Module> *mod, TableStorage &ts,
  vector<string> kflags;
  if (kbuild_helper.get_flags(un.machine, &kflags))
  return -1;
+#if LLVM_MAJOR_VERSION >= 9
+ flags_cstr.push_back("-g");
+#else
  if (flags_ & DEBUG_SOURCE)
  flags_cstr.push_back("-g");
+#endif
  for (auto it = kflags.begin(); it != kflags.end(); ++it)
  flags_cstr.push_back(it->c_str());