[GIT,PULL,00/27] perf tools: filtering events using eBPF programs

(I forget to CC mailing list when sending previous pull req. Sorry for the noisy.)

Hi Arnaldo,


   I rebased my code on your perf/core and send a new pull request. You
can find main changes in the tag message. The most biggest changes
are the resesigning of dummy placeholder and the new testcase for BPF
prologue. They are patch 10, patch 11,  patch 26 and patch 27. Please
have a look at them.

The following changes since commit 0959e527b1593e662cb99639a587eac39ea1232d:

  perf stat: Move sw clock metrics printout to stat-shadow (2015-09-04 20:30:01 -0300)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/pi3orama/linux tags/perf-ebpf-for-acme

for you to fetch changes up to 3af1c7f44478d1545f202bd0054e767d3f0f8130:

  perf test: Test BPF prologue (2015-09-06 06:10:12 +0000)

----------------------------------------------------------------
BPF related bugfix and improve

 1. Enforce the assumption that event parser never return empty list.

 2. Reuse code and API from kernel's regs_query_register_offset().

 3. Totally redesign dummy placeholder. Reuse existing dummy event instead
    of creating a new one.

 4. Introduce new testcases, test LLVM kbuild searching and BPF prologue.

 5. Adding a missing '!' in add_perf_probe_events.

 6. Use new API ({convert,apply,cleanup}_perf_probe_events) to probe events.
    (while fix a bug that non-root user can't trace non-BPF events, like cycles)

Signed-off-by: Wang Nan <wangnan0@huawei.com>

----------------------------------------------------------------

He Kuang (2):
  perf tools: Add prologue for BPF programs for fetching arguments
  perf record: Support custom vmlinux path

Wang Nan (25):
  perf tools: Don't write to evsel if parser doesn't collect evsel
  perf tools: Make perf depend on libbpf
  perf ebpf: Add the libbpf glue
  perf tools: Enable passing bpf object file to --event
  perf record, bpf: Parse and create probe points for BPF programs
  perf bpf: Collect 'struct perf_probe_event' for bpf_program
  perf record: Load all eBPF object into kernel
  perf tools: Add bpf_fd field to evsel and config it
  perf tools: Attach eBPF program to perf event
  perf tools: Allow BPF placeholder dummy events to collect --filter
    options
  perf tools: Sync setting of real bpf events with placeholder
  perf record: Add clang options for compiling BPF scripts
  perf tools: Compile scriptlets to BPF objects when passing '.c' to
    --event
  perf test: Enforce LLVM test for BPF test
  perf test: Add 'perf test BPF'
  bpf tools: Load a program with different instances using preprocessor
  perf probe: Reset args and nargs for probe_trace_event when failure
  perf tools: Add BPF_PROLOGUE config options for further patches
  perf tools: Introduce regs_query_register_offset() for x86
  perf tools: Generate prologue for BPF programs
  perf tools: Use same BPF program if arguments are identical
  perf probe: Init symbol as kprobe
  perf tools: Allow BPF program attach to uprobe events
  perf test: Enforce LLVM test, add kbuild test
  perf test: Test BPF prologue

 tools/build/Makefile.feature                |   6 +-
 tools/lib/bpf/libbpf.c                      | 143 +++++-
 tools/lib/bpf/libbpf.h                      |  22 +
 tools/perf/MANIFEST                         |   3 +
 tools/perf/Makefile.perf                    |  19 +-
 tools/perf/arch/x86/Makefile                |   1 +
 tools/perf/arch/x86/util/Build              |   1 +
 tools/perf/arch/x86/util/dwarf-regs.c       | 122 +++--
 tools/perf/builtin-record.c                 |  58 ++-
 tools/perf/builtin-stat.c                   |   8 +-
 tools/perf/builtin-top.c                    |  10 +-
 tools/perf/builtin-trace.c                  |   6 +-
 tools/perf/config/Makefile                  |  36 +-
 tools/perf/tests/Build                      |  24 +-
 tools/perf/tests/bpf-script-example.c       |  48 ++
 tools/perf/tests/bpf-script-test-kbuild.c   |  21 +
 tools/perf/tests/bpf-script-test-prologue.c |  35 ++
 tools/perf/tests/bpf.c                      | 229 +++++++++
 tools/perf/tests/builtin-test.c             |  12 +
 tools/perf/tests/llvm.c                     | 210 +++++++-
 tools/perf/tests/llvm.h                     |  29 ++
 tools/perf/tests/make                       |   4 +-
 tools/perf/tests/tests.h                    |   3 +
 tools/perf/util/Build                       |   2 +
 tools/perf/util/bpf-loader.c                | 756 ++++++++++++++++++++++++++++
 tools/perf/util/bpf-loader.h                |  94 ++++
 tools/perf/util/bpf-prologue.c              | 443 ++++++++++++++++
 tools/perf/util/bpf-prologue.h              |  34 ++
 tools/perf/util/evlist.c                    | 115 +++++
 tools/perf/util/evlist.h                    |   1 +
 tools/perf/util/evsel.c                     |  49 ++
 tools/perf/util/evsel.h                     |  24 +
 tools/perf/util/include/dwarf-regs.h        |   8 +
 tools/perf/util/parse-events.c              |  82 ++-
 tools/perf/util/parse-events.h              |   4 +
 tools/perf/util/parse-events.l              |   6 +
 tools/perf/util/parse-events.y              |  29 +-
 tools/perf/util/probe-event.c               |   2 +-
 tools/perf/util/probe-finder.c              |   4 +
 39 files changed, 2618 insertions(+), 85 deletions(-)
 create mode 100644 tools/perf/tests/bpf-script-example.c
 create mode 100644 tools/perf/tests/bpf-script-test-kbuild.c
 create mode 100644 tools/perf/tests/bpf-script-test-prologue.c
 create mode 100644 tools/perf/tests/bpf.c
 create mode 100644 tools/perf/tests/llvm.h
 create mode 100644 tools/perf/util/bpf-loader.c
 create mode 100644 tools/perf/util/bpf-loader.h
 create mode 100644 tools/perf/util/bpf-prologue.c
 create mode 100644 tools/perf/util/bpf-prologue.h