================
@@ -402,6 +420,36 @@ bool DebugNamesDWARFIndex::SameParentChain(
return true;
}
+bool DebugNamesDWARFIndex::WithinParentChain(
+ llvm::ArrayRef<llvm::StringRef> query_parent_names,
+ llvm::ArrayRef<DebugNames::Entry> parent_chain) const {
+ if (parent_chain.size() < query_parent_names.size())
+ return false;
+
+ size_t query_idx = 0, chain_idx = 0;
+ while (query_idx < query_parent_names.size() &&
+ chain_idx < parent_chain.size()) {
+ if (SameAsEntryATName(query_parent_names[query_idx],
+ parent_chain[chain_idx])) {
+ ++query_idx;
+ ++chain_idx;
+ } else {
+ // Name does not match, try next parent_chain entry if the current entry
+ // is namespace because the current one can be an inline namespace.
----------------
jeffreytan81 wrote:
Yeah, I would love to but I do not think .debug_names tag has information to
filter it out. It simply encodes `DW_TAG_namespace` tag:
```
Name 1748 {
Hash: 0xB3EF34A4
String: 0x0000ae01 "inline_ns"
Entry @ 0xb2d9 {
Abbrev: 0x5
Tag: DW_TAG_namespace
DW_IDX_die_offset: 0x00015df7
DW_IDX_parent: Entry @ 0xbab8
}
}
```
I guess we could try to PeekDieName() to parse this DIE from dwo files to check
if it is an inline vs non-inline namespace but that is the expensive code path
this PR wants to avoid.
https://github.com/llvm/llvm-project/pull/108907
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