[PATCH v2 2/7] Change handling of DW_TAG_enumeration_type in DWARF scanner

[Tom Tromey <tom@tromey.com>]

Currently the DWARF scanner will enter enumeration constants into the
same namespace as the DW_TAG_enumeration_type itself.  This is the
right thing to do, but the implementation may result in strange
entries being added to the addrmap that maps DIE ranges to entries.

This came up when debugging an earlier version of this series; and
while I don't think this should impact the current series, it seems
better to clean this up anyway.

In the new code, rather than pass the "wrong" scope down through
recursive calls to the scanner, the correct scope is always passed,
and then the parent handling is done when creating the enumerator
entry.
---
 gdb/dwarf2/read.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 7b306d8594c..b54b381aef3 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -16469,6 +16469,12 @@ cooked_indexer::index_dies (cutu_reader *reader,
 	  flags &= ~IS_STATIC;
 	  flags |= parent_entry->flags & IS_STATIC;
 	}
+      /* If the parent is an enum, but not an enum class, then use the
+	 grandparent instead.  */
+      if (this_parent_entry != nullptr
+	  && this_parent_entry->tag == DW_TAG_enumeration_type
+	  && !is_enum_class)
+	this_parent_entry = this_parent_entry->get_parent ();
 
       if (abbrev->tag == DW_TAG_namespace
 	  && m_language == language_cplus
@@ -16531,15 +16537,7 @@ cooked_indexer::index_dies (cutu_reader *reader,
 	      break;
 
 	    case DW_TAG_enumeration_type:
-	      /* We need to recurse even for an anonymous enumeration.
-		 Which scope we record as the parent scope depends on
-		 whether we're reading an "enum class".  If so, we use
-		 the enum itself as the parent, yielding names like
-		 "enum_class::enumerator"; otherwise we inject the
-		 names into our own parent scope.  */
-	      info_ptr = recurse (reader, info_ptr,
-				  is_enum_class ? this_entry : parent_entry,
-				  fully);
+	      info_ptr = recurse (reader, info_ptr, this_entry, fully);
 	      continue;
 
 	    case DW_TAG_module:

-- 
2.43.0