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| author | Stanislav Fomichev <sdf@google.com> | 2023-01-27 13:57:05 -0800 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2023-01-27 15:22:00 -0800 |
| commit | 16809afdcbad5fa45f34622f62873c7d7114cde5 (patch) | |
| tree | cd898dd11251900e659fba8d72af0d6625506d79 /init | |
| parent | e4ce876f10a21fb4e550d1743468791021a430f5 (diff) | |
| download | linux-16809afdcbad5fa45f34622f62873c7d7114cde5.tar.gz | |
selftest/bpf: Make crashes more debuggable in test_progs
Reset stdio before printing verbose log of the SIGSEGV'ed test.
Otherwise, it's hard to understand what's going on in the cases like [0].
With the following patch applied:
--- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
@@ -392,6 +392,11 @@ void test_xdp_metadata(void)
"generate freplace packet"))
goto out;
+
+ ASSERT_EQ(1, 2, "oops");
+ int *x = 0;
+ *x = 1; /* die */
+
while (!retries--) {
if (bpf_obj2->bss->called)
break;
Before:
#281 xdp_metadata:FAIL
Caught signal #11!
Stack trace:
./test_progs(crash_handler+0x1f)[0x55c919d98bcf]
/lib/x86_64-linux-gnu/libc.so.6(+0x3bf90)[0x7f36aea5df90]
./test_progs(test_xdp_metadata+0x1db0)[0x55c919d8c6d0]
./test_progs(+0x23b438)[0x55c919d9a438]
./test_progs(main+0x534)[0x55c919d99454]
/lib/x86_64-linux-gnu/libc.so.6(+0x2718a)[0x7f36aea4918a]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85)[0x7f36aea49245]
./test_progs(_start+0x21)[0x55c919b82ef1]
After:
test_xdp_metadata:PASS:ip netns add xdp_metadata 0 nsec
open_netns:PASS:malloc token 0 nsec
open_netns:PASS:open /proc/self/ns/net 0 nsec
open_netns:PASS:open netns fd 0 nsec
open_netns:PASS:setns 0 nsec
..
test_xdp_metadata:FAIL:oops unexpected oops: actual 1 != expected 2
#281 xdp_metadata:FAIL
Caught signal #11!
Stack trace:
./test_progs(crash_handler+0x1f)[0x562714a76bcf]
/lib/x86_64-linux-gnu/libc.so.6(+0x3bf90)[0x7fa663f9cf90]
./test_progs(test_xdp_metadata+0x1db0)[0x562714a6a6d0]
./test_progs(+0x23b438)[0x562714a78438]
./test_progs(main+0x534)[0x562714a77454]
/lib/x86_64-linux-gnu/libc.so.6(+0x2718a)[0x7fa663f8818a]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85)[0x7fa663f88245]
./test_progs(_start+0x21)[0x562714860ef1]
0: https://github.com/kernel-patches/bpf/actions/runs/4019879316/jobs/6907358876
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20230127215705.1254316-1-sdf@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions