linux-kernel - [RFC 0/8] perf/bpf: Add batch support for [ku]probes attach

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Date:   Wed, 24 Nov 2021 09:41:11 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Martin KaFai Lau <kafai@...com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Ravi Bangoria <ravi.bangoria@....com>
Subject: [RFC 0/8] perf/bpf: Add batch support for [ku]probes attach

hi,
adding support to create multiple kprobes/uprobes within single
perf event. This way we can associate single bpf program with
multiple kprobes.

Sending this as RFC because I'm not completely sure I haven't
missed anything in the trace/events area.

Also it needs following uprobe fix to work properly:
  https://lore.kernel.org/lkml/20211123142801.182530-1-jolsa@kernel.org/

Also available at:
  https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  bpf/kuprobe_batch

thanks,
jirka


---
Jiri Olsa (8):
      perf/kprobe: Add support to create multiple probes
      perf/uprobe: Add support to create multiple probes
      libbpf: Add libbpf__kallsyms_parse function
      libbpf: Add struct perf_event_open_args
      libbpf: Add support to attach multiple [ku]probes
      libbpf: Add support for k[ret]probe.multi program section
      selftest/bpf: Add kprobe multi attach test
      selftest/bpf: Add uprobe multi attach test

 include/uapi/linux/perf_event.h                            |   1 +
 kernel/trace/trace_event_perf.c                            | 214 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 kernel/trace/trace_kprobe.c                                |  47 ++++++++++++++++---
 kernel/trace/trace_probe.c                                 |   2 +-
 kernel/trace/trace_probe.h                                 |   6 ++-
 kernel/trace/trace_uprobe.c                                |  43 +++++++++++++++--
 tools/include/uapi/linux/perf_event.h                      |   1 +
 tools/lib/bpf/libbpf.c                                     | 235 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------
 tools/lib/bpf/libbpf.h                                     |  25 +++++++++-
 tools/lib/bpf/libbpf_internal.h                            |   5 ++
 tools/testing/selftests/bpf/prog_tests/multi_kprobe_test.c |  83 +++++++++++++++++++++++++++++++++
 tools/testing/selftests/bpf/prog_tests/multi_uprobe_test.c |  97 ++++++++++++++++++++++++++++++++++++++
 tools/testing/selftests/bpf/progs/multi_kprobe.c           |  58 +++++++++++++++++++++++
 tools/testing/selftests/bpf/progs/multi_uprobe.c           |  26 +++++++++++
 14 files changed, 765 insertions(+), 78 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/multi_kprobe_test.c
 create mode 100644 tools/testing/selftests/bpf/prog_tests/multi_uprobe_test.c
 create mode 100644 tools/testing/selftests/bpf/progs/multi_kprobe.c
 create mode 100644 tools/testing/selftests/bpf/progs/multi_uprobe.c