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| author | Song Liu <songliubraving@fb.com> | 2020-07-23 11:06:45 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-07-25 20:16:34 -0700 |
| commit | 5d99cb2c86775b4780c02a339a9578bf9471ead9 (patch) | |
| tree | 25c9829e8b83c8066b286c414821fac40a4e3c04 /tools/testing/selftests/bpf/prog_tests/perf_event_stackmap.c | |
| parent | 7b04d6d60fcfb5b2200ffebb9cfb90927bdfeec7 (diff) | |
bpf: Fail PERF_EVENT_IOC_SET_BPF when bpf_get_[stack|stackid] cannot work
bpf_get_[stack|stackid] on perf_events with precise_ip uses callchain
attached to perf_sample_data. If this callchain is not presented, do not
allow attaching BPF program that calls bpf_get_[stack|stackid] to this
event.
In the error case, -EPROTO is returned so that libbpf can identify this
error and print proper hint message.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200723180648.1429892-3-songliubraving@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/perf_event_stackmap.c')
0 files changed, 0 insertions, 0 deletions