[PATCH 2/2] perf dwarf-aux: Allow unnamed struct/union/enum

[Namhyung Kim <namhyung@kernel.org>]

It's possible some struct/union/enum type don't have type name.  Allow
the empty name after "struct"/"union"/"enum" string rather than fail.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/dwarf-aux.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index 1ac88b79687d..759434552653 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1074,16 +1074,18 @@ int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf)
 		/* Function pointer */
 		return strbuf_add(buf, "(function_type)", 15);
 	} else {
-		if (!dwarf_diename(&type))
-			return -ENOENT;
+		const char *name = dwarf_diename(&type);
+
 		if (tag == DW_TAG_union_type)
 			tmp = "union ";
 		else if (tag == DW_TAG_structure_type)
 			tmp = "struct ";
 		else if (tag == DW_TAG_enumeration_type)
 			tmp = "enum ";
+		else if (name == NULL)
+			return -ENOENT;
 		/* Write a base name */
-		return strbuf_addf(buf, "%s%s", tmp, dwarf_diename(&type));
+		return strbuf_addf(buf, "%s%s", tmp, name ?: "");
 	}
 	ret = die_get_typename(&type, buf);
 	return ret ? ret : strbuf_addstr(buf, tmp);
-- 
2.41.0.162.gfafddb0af9-goog