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selftests/bpf: Make pyperf600 a success again

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pyperf600 has been running into 8K BPF_COMPLEXITY_LIMIT_JMP_SEQ limitations
for a long while now, after some internal compiler changes.

Until BPF verifier is bestowed with scalar evolution logic, make that test
actually work by doing what would anyone should do in such situations: by
moving repeatable per-iteration work into independently verified global
functions.

`void *` argument is a problem for global funcs, but a static function wrapper
doing necessary casts and a bit of __arg_nonnull magic dust is all it takes.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Tested-by: Pu Lehui <pulehui@huawei.com> # riscv
Reviewed-by: Pu Lehui <pulehui@huawei.com>
Link: https://lore.kernel.org/bpf/20260813232943.581283-1-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2026-08-13 16:29:43 -07:00
committed by Daniel Borkmann
parent 073574da7a
commit c7e6175529
1 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
tools/testing/selftests/bpf/progs/pyperf.h
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@@ -85,9 +85,11 @@ static void *get_thread_state(void *tls_base, PidData *pidData)
return thread_state;
}
static __always_inline bool get_frame_data(void *frame_ptr, PidData *pidData,
FrameData *frame, Symbol *symbol)
__weak bool __get_frame_data(long frame_ptr_, PidData *pidData __arg_nonnull,
FrameData *frame __arg_nonnull, Symbol *symbol __arg_nonnull)
{
void *frame_ptr = (void *)frame_ptr_;
// read data from PyFrameObject
bpf_probe_read_user(&frame->f_back,
sizeof(frame->f_back),
@@ -119,6 +121,12 @@ static __always_inline bool get_frame_data(void *frame_ptr, PidData *pidData,
return true;
}
static __always_inline bool get_frame_data(void *frame_ptr, PidData *pidData,
FrameData *frame, Symbol *symbol)
{
return __get_frame_data((long)frame_ptr, pidData, frame, symbol);
}
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 1);