[PATCH v2 0/2] perf probe: fix regression introduced by switch to die_get_decl_file

From: Georg Müller
Date: Wed Jun 28 2023 - 04:28:55 EST


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

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