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bpf/tests: Enhance output on error and fix typos

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If a testcase returns a wrong (unexpected) value, print the expected and
returned value in hex notation in addition to the decimal notation.

This is very useful in tests which bit-shift hex values left or right and
helped me a lot while developing the JIT compiler for the hppa architecture.

Additionally fix two typos: dowrd -> dword, tall calls -> tail calls.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/ZN6ZAAVoWZpsD1Jf@p100
This commit is contained in:
Helge Deller 2023-08-18 00:02:40 +02:00 committed by Daniel Borkmann
parent 6c77997bc6
commit b6594a17ec
1 changed files with 7 additions and 5 deletions
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12
lib/test_bpf.c
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@ -596,8 +596,8 @@ static int __bpf_fill_alu_shift(struct bpf_test *self, u8 op,
{
static const s64 regs[] = {
0x0123456789abcdefLL, /* dword > 0, word < 0 */
0xfedcba9876543210LL, /* dowrd < 0, word > 0 */
0xfedcba0198765432LL, /* dowrd < 0, word < 0 */
0xfedcba9876543210LL, /* dword < 0, word > 0 */
0xfedcba0198765432LL, /* dword < 0, word < 0 */
0x0123458967abcdefLL, /* dword > 0, word > 0 */
};
int bits = alu32 ? 32 : 64;
@ -14567,8 +14567,10 @@ static int run_one(const struct bpf_prog *fp, struct bpf_test *test)
if (ret == test->test[i].result) {
pr_cont("%lld ", duration);
} else {
pr_cont("ret %d != %d ", ret,
test->test[i].result);
s32 res = test->test[i].result;
pr_cont("ret %d != %d (%#x != %#x)",
ret, res, ret, res);
err_cnt++;
}
}
@ -15045,7 +15047,7 @@ static __init int prepare_tail_call_tests(struct bpf_array **pprogs)
struct bpf_array *progs;
int which, err;
/* Allocate the table of programs to be used for tall calls */
/* Allocate the table of programs to be used for tail calls */
progs = kzalloc(struct_size(progs, ptrs, ntests + 1), GFP_KERNEL);
if (!progs)
goto out_nomem;