The usdt/multispec test failed with arm64 arch and clang20 compiler.
On arm64, gcc11 and clang20 generates significantly different usdt
probes and such a difference caused clang20 built selftest failed.
Patches 1 and 2 are refactoring and Patch 3 adjusted BPF_USDT_MAX_SPEC_CNT
for arm64/clang which fixed the issue.
Changelogs:
v1 -> v2:
- v1: https://lore.kernel.org/bpf/20250613153446.2256725-1-yonghong.song@xxxxxxxxx/
- The commit description in v1 is not right, it checks sdt's for usdt_100
while actually it usdt_300 should be checked. Patch 1 has proper
descriptions.
- Refactor the code to add a new test ust/multispec_fail where a new
prog is added and in that new prog BPF_USDT_MAX_SPEC_CNT can overwrite
the default value in order to pass the test.
Yonghong Song (3):
selftests/bpf: Refactor the failed assertion to another subtest
selftests/bpf: Add test_usdt_multispec.inc.h for sharing between
multiple progs
selftests/bpf: Add subtest usdt_multispec_fail with adjustable
BPF_USDT_MAX_SPEC_CNT
tools/testing/selftests/bpf/prog_tests/usdt.c | 36 +++++++++++++------
.../selftests/bpf/progs/test_usdt_multispec.c | 28 +--------------
.../bpf/progs/test_usdt_multispec.inc.h | 30 ++++++++++++++++
.../bpf/progs/test_usdt_multispec_fail.c | 10 ++++++
4 files changed, 67 insertions(+), 37 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/test_usdt_multispec.inc.h
create mode 100644 tools/testing/selftests/bpf/progs/test_usdt_multispec_fail.c
--
2.47.1
