================
@@ -218,6 +219,106 @@ void DebugNamesDWARFIndex::GetCompleteObjCClass(
m_fallback.GetCompleteObjCClass(class_name, must_be_implementation,
callback);
}
+namespace {
+using Entry = llvm::DWARFDebugNames::Entry;
+
+/// If `entry` and all of its parents have an `IDX_parent`, use that
information
+/// to build and return a list of at most `max_parents` parent Entries.
+/// `entry` itself is not included in the list.
+/// If any parent does not have an `IDX_parent`, or the Entry data is
corrupted,
+/// nullopt is returned.
+std::optional<llvm::SmallVector<Entry, 4>>
+getParentChain(Entry entry, uint32_t max_parents) {
+ llvm::SmallVector<Entry, 4> parent_entries;
+
+ do {
+ if (!entry.hasParentInformation())
+ return std::nullopt;
+
+ llvm::Expected<std::optional<Entry>> parent = entry.getParentDIEEntry();
+ if (!parent) {
+ // Bad data.
+ consumeError(parent.takeError());
+ return std::nullopt;
+ }
+
+ // Last parent in the chain.
+ if (!parent->has_value())
+ break;
+
+ parent_entries.push_back(**parent);
+ entry = **parent;
+ } while (parent_entries.size() < max_parents);
+
+ return parent_entries;
+}
+} // namespace
+
+void DebugNamesDWARFIndex::GetFullyQualifiedType(
+ const DWARFDeclContext &context,
+ llvm::function_ref<bool(DWARFDIE die)> callback) {
+ if (context.GetSize() == 0)
+ return;
+
+ llvm::StringRef leaf_name = context[0].name;
+ llvm::SmallVector<llvm::StringRef> parent_names;
+ for (auto idx : llvm::seq<int>(1, context.GetSize()))
+ parent_names.emplace_back(context[idx].name);
+
+ // For each entry, grab its parent chain and check if we have a match.
+ for (const DebugNames::Entry &entry :
+ m_debug_names_up->equal_range(leaf_name)) {
+ if (!isType(entry.tag()))
+ continue;
+
+ // Grab at most one extra parent, subsequent parents are not necessary to
+ // test equality.
+ std::optional<llvm::SmallVector<Entry, 4>> parent_chain =
+ getParentChain(entry, parent_names.size() + 1);
----------------
felipepiovezan wrote:
Not sure I follow, the intent is to only match things that are 100% identical.
The parent chain size is checked first thing inside `SameParentChain`:
```
bool DebugNamesDWARFIndex::SameParentChain(...) {
if (parent_entries.size() != parent_names.size())
return false;
```
https://github.com/llvm/llvm-project/pull/79932
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