[PATCH v4 00/28] Constify tool pointers

[Ian Rogers <irogers@google.com>]

struct perf_tool provides a set of function pointers that are called
through when processing perf data. To make filling the pointers less
cumbersome, if they are NULL perf_tools__fill_defaults will add
default do nothing implementations.

This change refactors struct perf_tool to have an init function that
provides the default implementation. The special use of NULL and
perf_tools__fill_defaults are removed. As a consequence the tool
pointers can then all be made const, which better reflects the
behavior a particular perf command would expect of the tool and to
some extent can reduce the cognitive load on someone working on a
command.

v4: Simplify perf_session__deliver_synth_attr_event following Adrian's
    suggestions.
v3: Just remove auxtrace dummy tools [Adrian] and make s390-cpumsf
    struct removal its own patch [Adrian].
v2: Remove dummy tool initialization [Adrian] and make zero sized. Add
    cs-etm fix for address sanitizer build, found necessary when
    testing dummy tool change.

Ian Rogers (28):
  perf auxtrace: Remove dummy tools
  perf s390-cpumsf: Remove unused struct
  perf cs-etm: Fix address sanitizer dso build failure
  perf tool: Constify tool pointers
  perf tool: Move fill defaults into tool.c
  perf tool: Add perf_tool__init
  perf kmem: Use perf_tool__init
  perf buildid-list: Use perf_tool__init
  perf kvm: Use perf_tool__init
  perf lock: Use perf_tool__init
  perf evlist: Use perf_tool__init
  perf record: Use perf_tool__init
  perf c2c: Use perf_tool__init
  perf script: Use perf_tool__init
  perf inject: Use perf_tool__init
  perf report: Use perf_tool__init
  perf stat: Use perf_tool__init
  perf annotate: Use perf_tool__init
  perf sched: Use perf_tool__init
  perf mem: Use perf_tool__init
  perf timechart: Use perf_tool__init
  perf diff: Use perf_tool__init
  perf data convert json: Use perf_tool__init
  perf data convert ctf: Use perf_tool__init
  perf test event_update: Ensure tools is initialized
  perf kwork: Use perf_tool__init
  perf tool: Remove perf_tool__fill_defaults
  perf session: Constify tool

 tools/perf/arch/x86/util/event.c    |   4 +-
 tools/perf/bench/synthesize.c       |   2 +-
 tools/perf/builtin-annotate.c       |  44 ++--
 tools/perf/builtin-buildid-list.c   |  10 +
 tools/perf/builtin-c2c.c            |  33 ++-
 tools/perf/builtin-diff.c           |  30 ++-
 tools/perf/builtin-evlist.c         |  10 +-
 tools/perf/builtin-inject.c         | 159 ++++++------
 tools/perf/builtin-kmem.c           |  20 +-
 tools/perf/builtin-kvm.c            |  19 +-
 tools/perf/builtin-kwork.c          |  33 ++-
 tools/perf/builtin-lock.c           |  41 ++--
 tools/perf/builtin-mem.c            |  37 +--
 tools/perf/builtin-record.c         |  47 ++--
 tools/perf/builtin-report.c         |  67 +++--
 tools/perf/builtin-sched.c          |  50 ++--
 tools/perf/builtin-script.c         | 106 ++++----
 tools/perf/builtin-stat.c           |  26 +-
 tools/perf/builtin-timechart.c      |  25 +-
 tools/perf/builtin-top.c            |   2 +-
 tools/perf/builtin-trace.c          |   4 +-
 tools/perf/tests/cpumap.c           |   6 +-
 tools/perf/tests/dlfilter-test.c    |   2 +-
 tools/perf/tests/dwarf-unwind.c     |   2 +-
 tools/perf/tests/event_update.c     |   9 +-
 tools/perf/tests/stat.c             |   6 +-
 tools/perf/tests/thread-map.c       |   2 +-
 tools/perf/util/Build               |   1 +
 tools/perf/util/arm-spe.c           |  55 +----
 tools/perf/util/auxtrace.c          |  12 +-
 tools/perf/util/auxtrace.h          |  20 +-
 tools/perf/util/bpf-event.c         |   4 +-
 tools/perf/util/build-id.c          |  34 +--
 tools/perf/util/build-id.h          |   8 +-
 tools/perf/util/cs-etm.c            |  49 +---
 tools/perf/util/data-convert-bt.c   |  34 ++-
 tools/perf/util/data-convert-json.c |  47 ++--
 tools/perf/util/dso.h               |  10 +
 tools/perf/util/event.c             |  54 ++--
 tools/perf/util/event.h             |  38 +--
 tools/perf/util/header.c            |   6 +-
 tools/perf/util/header.h            |   4 +-
 tools/perf/util/hisi-ptt.c          |   6 +-
 tools/perf/util/intel-bts.c         |  37 +--
 tools/perf/util/intel-pt.c          |  30 +--
 tools/perf/util/jitdump.c           |   4 +-
 tools/perf/util/s390-cpumsf.c       |  11 +-
 tools/perf/util/session.c           | 366 +++-------------------------
 tools/perf/util/session.h           |   9 +-
 tools/perf/util/synthetic-events.c  |  80 +++---
 tools/perf/util/synthetic-events.h  |  70 +++---
 tools/perf/util/tool.c              | 294 ++++++++++++++++++++++
 tools/perf/util/tool.h              |  18 +-
 tools/perf/util/tsc.c               |   2 +-
 54 files changed, 992 insertions(+), 1107 deletions(-)
 create mode 100644 tools/perf/util/tool.c

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2.45.2.993.g49e7a77208-goog