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selftests/bpf: Add test for checking correct nop of optimized usdt

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Adding test that attaches bpf program on usdt probe in 2 scenarios;

- attach program on top of usdt_1, which is single nop instruction,
  so the probe stays on nop instruction and is not optimized.

- attach program on top of usdt_2 which is probe defined on top
  of nop,nop5 combo, so the probe is placed on top of nop5 and
  is optimized.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260224103915.1369690-5-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa
2026-02-24 11:39:14 +01:00
committed by Alexei Starovoitov
parent 0c178e9deb
commit 304841967c
6 changed files with 142 additions and 1 deletions
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3
tools/testing/selftests/bpf/Makefile
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@@ -754,7 +754,8 @@ TRUNNER_EXTRA_SOURCES := test_progs.c \
$(VERIFY_SIG_HDR) \
flow_dissector_load.h \
ip_check_defrag_frags.h \
bpftool_helpers.c
bpftool_helpers.c \
usdt_1.c usdt_2.c
TRUNNER_LIB_SOURCES := find_bit.c
TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read \
$(OUTPUT)/liburandom_read.so \