[PATCH v3 0/2] perf probe: fix regression introduced by switch to die_get_decl_file

[Georg Müller]

When switching from dwarf_decl_file() to die_get_decl_file(), a regression
was introduced when having a binary where the DWARF info is split to
multiple CUs. It is not possible to add probes to certain functions.

These patches introduce a testcase which shows the current regression
and a fix for the issue

Signed-off-by: Georg Müller <georgmueller@xxxxxxx>
Link: https://lore.kernel.org/r/5a00d5a5-7be7-ef8a-4044-9a16249fff25@xxxxxxx/

---
Changes in v2:
 - Add testcase

Changes in v3:
 - start new thread
 - add stable to cc

Georg Müller (2):
  perf probe: add test for regression introduced by switch to
    die_get_decl_file
  perf probe: read DWARF files from the correct CU

 .../shell/test_uprobe_from_different_cu.sh    | 77 +++++++++++++++++++
 tools/perf/util/dwarf-aux.c                   |  4 +-
 2 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100755 tools/perf/tests/shell/test_uprobe_from_different_cu.sh

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2.41.0