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| author | Yonghong Song <yhs@fb.com> | 2020-08-24 15:28:07 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-08-24 21:15:13 -0700 |
| commit | 0fcdfffe80346d015b920228203d0269284d8b13 (patch) | |
| tree | 7ee8b1d806fa55f59819b006b7848ed70d9e8831 | |
| parent | f0c328f8af5d920a68f8217aec76d9a45288cef1 (diff) | |
| download | linux-0fcdfffe80346d015b920228203d0269284d8b13.tar.gz | |
selftests/bpf: Enable tc verbose mode for test_sk_assign
Currently test_sk_assign failed verifier with llvm11/llvm12.
During debugging, I found the default verifier output is
truncated like below
Verifier analysis:
Skipped 2200 bytes, use 'verb' option for the full verbose log.
[...]
off=23,r=34,imm=0) R5=inv0 R6=ctx(id=0,off=0,imm=0) R7=pkt(id=0,off=0,r=34,imm=0) R10=fp0
80: (0f) r7 += r2
last_idx 80 first_idx 21
regs=4 stack=0 before 78: (16) if w3 == 0x11 goto pc+1
when I am using "./test_progs -vv -t assign".
The reason is tc verbose mode is not enabled.
This patched enabled tc verbose mode and the output looks like below
Verifier analysis:
0: (bf) r6 = r1
1: (b4) w0 = 2
2: (61) r1 = *(u32 *)(r6 +80)
3: (61) r7 = *(u32 *)(r6 +76)
4: (bf) r2 = r7
5: (07) r2 += 14
6: (2d) if r2 > r1 goto pc+61
R0_w=inv2 R1_w=pkt_end(id=0,off=0,imm=0) R2_w=pkt(id=0,off=14,r=14,imm=0)
...
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200824222807.100200-1-yhs@fb.com
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/sk_assign.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/sk_assign.c b/tools/testing/selftests/bpf/prog_tests/sk_assign.c index d43038d2b9e1..a49a26f95a8b 100644 --- a/tools/testing/selftests/bpf/prog_tests/sk_assign.c +++ b/tools/testing/selftests/bpf/prog_tests/sk_assign.c @@ -49,7 +49,7 @@ configure_stack(void) sprintf(tc_cmd, "%s %s %s %s", "tc filter add dev lo ingress bpf", "direct-action object-file ./test_sk_assign.o", "section classifier/sk_assign_test", - (env.verbosity < VERBOSE_VERY) ? " 2>/dev/null" : ""); + (env.verbosity < VERBOSE_VERY) ? " 2>/dev/null" : "verbose"); if (CHECK(system(tc_cmd), "BPF load failed;", "run with -vv for more info\n")) return false; |