hi, Mahe reported missing function from stack trace on top of kprobe multi program. It turned out the latest fix [1] needs some more fixing.
v2 changes: - keep the unwind same as for kprobes, attached function is part of entry probe stacktrace, not kretprobe [Steven] - several change in trigger bench [Andrii] - added selftests for standard kprobes and fentry/fexit probes [Andrii] Note I'll try to add similar stacktrace adjustment for fentry/fexit in separate patchset to not complicate this change. thanks, jirka [1] https://lore.kernel.org/bpf/[email protected]/ --- Jiri Olsa (6): x86/fgraph: Fix return_to_handler regs.rsp value x86/fgraph,bpf: Switch kprobe_multi program stack unwind to hw_regs path selftests/bpf: Fix kprobe multi stacktrace_ips test selftests/bpf: Add stacktrace ips test for kprobe/kretprobe selftests/bpf: Add stacktrace ips test for fentry/fexit selftests/bpf: Allow to benchmark trigger with stacktrace arch/x86/include/asm/ftrace.h | 2 +- arch/x86/kernel/ftrace_64.S | 5 +++- tools/testing/selftests/bpf/bench.c | 4 ++++ tools/testing/selftests/bpf/bench.h | 1 + tools/testing/selftests/bpf/benchs/bench_trigger.c | 1 + tools/testing/selftests/bpf/prog_tests/stacktrace_ips.c | 120 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---- tools/testing/selftests/bpf/progs/stacktrace_ips.c | 27 ++++++++++++++++++++++ tools/testing/selftests/bpf/progs/trigger_bench.c | 46 +++++++++++++++++++++++++++++-------- 8 files changed, 190 insertions(+), 16 deletions(-)
