perf dwarf-aux: Collect all variable locations for insn tracking

Browse source

Previously, only the first DWARF location entry was collected for each
variable. This was based on the assumption that instruction tracking
could reconstruct the remaining state. However, variables may have
different locations across different address ranges, and relying solely
on instruction tracking can miss valid type information.

Change __die_collect_vars_cb() to iterate over all location entries
using dwarf_getlocations() in a loop. This ensures that variables with
multiple location ranges are properly tracked, improving type coverage.

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

...

This commit is contained in:

Zecheng Li 2026-03-09 13:55:24 -04:00 • committed by Namhyung Kim

parent 4fb7eefe6c

commit a90407a5a8

1 changed files with 30 additions and 30 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

58

tools/perf/util/dwarf-aux.c

View file