The __die_find_member_offset_cb() missed to handle bitfield members
which don't have DW_AT_data_member_location. Like in adding member
types in __add_member_cb() it should fallback to check the bit offset
when it resolves the member type for an offset.
Fixes: 437683a994189 ("perf dwarf-aux: Handle type transfer for memory access")
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/dwarf-aux.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index 0151a8d14350..92eb9c8dc3e5 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1977,8 +1977,15 @@ static int __die_find_member_offset_cb(Dwarf_Die *die_mem, void *arg)
return DIE_FIND_CB_SIBLING;
/* Unions might not have location */
- if (die_get_data_member_location(die_mem, &loc) < 0)
- loc = 0;
+ if (die_get_data_member_location(die_mem, &loc) < 0) {
+ Dwarf_Attribute attr;
+
+ if (dwarf_attr_integrate(die_mem, DW_AT_data_bit_offset, &attr) &&
+ dwarf_formudata(&attr, &loc) == 0)
+ loc /= 8;
+ else
+ loc = 0;
+ }
if (offset == loc)
return DIE_FIND_CB_END;
--
2.46.0.184.g6999bdac58-goog