[llvm] [llvm-readobj] Dump callgraph section info for ELF (PR #157499)

[Prabhu Rajasekaran via llvm-commits]

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@@ -5260,6 +5307,247 @@ template <class ELFT> void GNUELFDumper<ELFT>::printCGProfile() {
   OS << "GNUStyle::printCGProfile not implemented\n";
 }
 
+template <class ELFT>
+static std::optional<object::SectionRef>
+getCallGraphSection(const object::ELFObjectFile<ELFT> &ObjF) {
+  // Get the .callgraph section.
+  StringRef CallGraphSectionName(".callgraph");
+  std::optional<object::SectionRef> CallGraphSection;
+  for (auto Sec : ObjF.sections()) {
+    StringRef Name;
+    if (Expected<StringRef> NameOrErr = Sec.getName())
+      Name = *NameOrErr;
+    else
+      consumeError(NameOrErr.takeError());
+
+    if (Name == CallGraphSectionName)
+      return Sec;
+  }
+  return CallGraphSection;
+}
+
+template <class ELFT> bool ELFDumper<ELFT>::processCallGraphSection() {
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Prabhuk wrote:

Yep, relying on the automatic derived behavior for JSON. I do not see a reason to have a separate implementation to avoid duplication of code. Please let me know if that is fine.

https://github.com/llvm/llvm-project/pull/157499