[llvm] Reland: [ORC] Tailor ELF debugger support plugin to load-address patching only (PR #169482)

[Stefan Gränitz via llvm-commits]

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@@ -419,91 +186,165 @@ ELFDebugObjectPlugin::ELFDebugObjectPlugin(ExecutionSession &ES,
 
 ELFDebugObjectPlugin::~ELFDebugObjectPlugin() = default;
 
+static const std::set<StringRef> DwarfSectionNames = {
+#define HANDLE_DWARF_SECTION(ENUM_NAME, ELF_NAME, CMDLINE_NAME, OPTION)        \
+  ELF_NAME,
+#include "llvm/BinaryFormat/Dwarf.def"
+#undef HANDLE_DWARF_SECTION
+};
+
+static bool isDwarfSection(StringRef SectionName) {
+  return DwarfSectionNames.count(SectionName) == 1;
+}
+
 void ELFDebugObjectPlugin::notifyMaterializing(
     MaterializationResponsibility &MR, LinkGraph &G, JITLinkContext &Ctx,
-    MemoryBufferRef ObjBuffer) {
-  std::lock_guard<std::mutex> Lock(PendingObjsLock);
-  assert(PendingObjs.count(&MR) == 0 &&
-         "Cannot have more than one pending debug object per "
-         "MaterializationResponsibility");
-
-  if (auto DebugObj = createDebugObjectFromBuffer(ES, G, Ctx, ObjBuffer)) {
-    // Not all link artifacts allow debugging.
-    if (*DebugObj == nullptr)
-      return;
-    if (RequireDebugSections && !(**DebugObj).hasFlags(HasDebugSections)) {
-      LLVM_DEBUG(dbgs() << "Skipping debug registration for LinkGraph '"
-                        << G.getName() << "': no debug info\n");
-      return;
-    }
-    PendingObjs[&MR] = std::move(*DebugObj);
-  } else {
-    ES.reportError(DebugObj.takeError());
+    MemoryBufferRef InputObj) {
+  if (InputObj.getBufferSize() == 0)
+    return;
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weliveindetail wrote:

The failing compiler-rt tests were running materializations without input objects. This should be fixed now.

https://github.com/llvm/llvm-project/pull/169482