diff options
| author | KaFai Wan <kafai.wan@linux.dev> | 2026-10-18 08:53:46 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-10-18 22:39:48 +0000 |
| commit | 8d637d4c62c1880062dbb098f67b804e2eff85aa (patch) | |
| tree | 836b1ba9c5217efbf7792524918091a3cedaf470 /tools/testing | |
| parent | 0ceb2f21d3e02b310ed246a210b6cecea24e19b2 (diff) | |
selftests/bpf: Fix stack_arg precision backtracking log expectation
Commit 147400e9c27c ("bpf: Compute parameters liveness in
bpf_compute_live_registers()") stopped assuming that a call to a static
subprogram reads r1..r5 and now uses the callee's entry live-in. R1-R5 are
not live at these call insns, so __clean_func_state() clears them from the
caller state and the backtracked parent state prints as:
mark_precise: frame0: parent state regs= stack=: R10=fp0
Update both expectations accordingly.
Fixes: 147400e9c27c ("bpf: Compute parameters liveness in bpf_compute_live_registers()")
Signed-off-by: KaFai Wan <kafai.wan@linux.dev>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20261018005348.2195130-3-kafai.wan@linux.dev
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/stack_arg_precision.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/bpf/progs/stack_arg_precision.c b/tools/testing/selftests/bpf/progs/stack_arg_precision.c index 7baa9c1c8e31..c9564776d733 100644 --- a/tools/testing/selftests/bpf/progs/stack_arg_precision.c +++ b/tools/testing/selftests/bpf/progs/stack_arg_precision.c @@ -74,7 +74,7 @@ __msg("mark_precise: frame1: parent state regs= stack=: frame1: R10=fp0") __msg("mark_precise: frame0: parent state regs= stack=: R10=fp0") __msg("mark_precise: frame1: last_idx 11 first_idx 11 subseq_idx 13") __msg("mark_precise: frame1: regs= stack= before 11: (85) call pc+1") -__msg("mark_precise: frame0: parent state regs= stack=: R1=1 R2=2 R3=3 R4=4 R5=5 R10=fp0") +__msg("mark_precise: frame0: parent state regs= stack=: R10=fp0") __msg("mark_precise: frame0: last_idx 9 first_idx 7 subseq_idx 11") __msg("mark_precise: frame0: regs= stack= before 9: (05) goto pc+1") __msg("mark_precise: frame0: regs= stack= before 8: (7a) *(u64 *)(r11 -8) = 4") @@ -95,7 +95,7 @@ __msg("mark_precise: frame1: parent state regs= stack=: frame1: R10=fp0") __msg("mark_precise: frame0: parent state regs= stack=: R10=fp0") __msg("mark_precise: frame1: last_idx 11 first_idx 11 subseq_idx 13 ") __msg("mark_precise: frame1: regs= stack= before 11: (85) call pc+1") -__msg("mark_precise: frame0: parent state regs= stack=: R1=1 R2=2 R3=3 R4=4 R5=5 R10=fp0") +__msg("mark_precise: frame0: parent state regs= stack=: R10=fp0") __msg("mark_precise: frame0: last_idx 10 first_idx 10 subseq_idx 11 ") __msg("mark_precise: frame0: regs= stack= before 10: (7a) *(u64 *)(r11 -8) = 6") __naked void stack_arg_precision_bpf2bpf(void) |