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selftests/bpf: Add selftests for bpf_stream_print_stack

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Add selftests for the new bpf_stream_print_stack kfunc.

Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260203180424.14057-3-emil@etsalapatis.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Emil Tsalapatis
2026-02-03 13:04:22 -05:00
committed by Alexei Starovoitov
parent 63328bb23f
commit 954fa97e21
1 changed files with 21 additions and 0 deletions
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21
tools/testing/selftests/bpf/progs/stream.c
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@@ -234,4 +234,25 @@ int stream_arena_callback_fault(void *ctx)
return 0;
}
SEC("syscall")
__arch_x86_64
__arch_arm64
__success __retval(0)
__stderr("CPU: {{[0-9]+}} UID: 0 PID: {{[0-9]+}} Comm: {{.*}}")
__stderr("Call trace:\n"
"{{([a-zA-Z_][a-zA-Z0-9_]*\\+0x[0-9a-fA-F]+/0x[0-9a-fA-F]+\n"
"|[ \t]+[^\n]+\n)*}}")
int stream_print_stack_kfunc(void *ctx)
{
return bpf_stream_print_stack(BPF_STDERR);
}
SEC("syscall")
__success __retval(-2)
int stream_print_stack_invalid_id(void *ctx)
{
/* Try to pass an invalid stream ID. */
return bpf_stream_print_stack((enum bpf_stream_id)0xbadcafe);
}
char _license[] SEC("license") = "GPL";