perf dwarf-aux: Add die_get_pointer_type to get pointer types

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When a variable type is wrapped in typedef/qualifiers, callers may need
to first resolve it to the underlying DW_TAG_pointer_type or
DW_TAG_array_type. A simple tag check is not enough and directly calling
__die_get_real_type() can stop at the pointer type (e.g. typedef ->
pointer) instead of the pointee type.

Add die_get_pointer_type() helper that follows typedef/qualifier chains
and returns the underlying pointer DIE. Use it in annotate-data.c so
pointer checks and dereference work correctly for typedef'd pointers.

Signed-off-by: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

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This commit is contained in:

Zecheng Li 2026-03-09 13:55:14 -04:00 • committed by Namhyung Kim

parent 616cd6047c

commit 30b2e6fa58

3 changed files with 51 additions and 17 deletions

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39

tools/perf/util/annotate-data.c

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27

tools/perf/util/dwarf-aux.c

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2

tools/perf/util/dwarf-aux.h

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