selftests/bpf: Add test for bpf_get_branch_snapshot

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This test uses bpf_get_branch_snapshot from a fexit program. The test uses
a target function (bpf_testmod_loop_test) and compares the record against
kallsyms. If there isn't enough record matching kallsyms, the test fails.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210910183352.3151445-4-songliubraving@fb.com

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Song Liu 2021-09-10 11:33:52 -07:00 • committed by Alexei Starovoitov

parent 856c02dbce

commit 025bd7c753

9 changed files with 243 additions and 52 deletions

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19

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c

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tools/testing/selftests/bpf/prog_tests/core_reloc.c

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100

tools/testing/selftests/bpf/prog_tests/get_branch_snapshot.c

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tools/testing/selftests/bpf/prog_tests/module_attach.c

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tools/testing/selftests/bpf/progs/get_branch_snapshot.c

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tools/testing/selftests/bpf/test_progs.c

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tools/testing/selftests/bpf/test_progs.h

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tools/testing/selftests/bpf/trace_helpers.c

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5

tools/testing/selftests/bpf/trace_helpers.h

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