hi,
there's bug in kprobe_multi link that makes cookies misplaced when
using symbols to attach. The reason is that we sort symbols by name
but not adjacent cookie values. Current test did not find it because
bpf_fentry_test* are already sorted by name.
v3 changes:
- fixed kprobe_multi bench test to filter out invalid entries
from available_filter_functions
v2 changes:
- rebased on top of bpf/master
- checking if cookies are defined later in swap function [Andrii]
- added acks
thanks,
jirka
---
Jiri Olsa (4):
selftests/bpf: Shuffle cookies symbols in kprobe multi test
ftrace: Keep address offset in ftrace_lookup_symbols
bpf: Force cookies array to follow symbols sorting
selftest/bpf: Fix kprobe_multi bench test
kernel/trace/bpf_trace.c | 60 +++++++++++++++++++++++++++++++++++++++++++++---------------
kernel/trace/ftrace.c | 13 +++++++++++--
tools/testing/selftests/bpf/prog_tests/bpf_cookie.c | 78 +++++++++++++++++++++++++++++++++++++++---------------------------------------
tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c | 3 +++
tools/testing/selftests/bpf/progs/kprobe_multi.c | 24 ++++++++++++------------
5 files changed, 110 insertions(+), 68 deletions(-)
