Em Sun, Jun 27, 2021 at 04:18:08PM +0300, Adrian Hunter escreveu:

Hi
 
In some cases, users want to filter very large amounts of data (e.g. from
AUX area tracing like Intel PT) looking for something specific. While
scripting such as Python can be used, Python is 10 to 20 times slower than
C. So define a C API so that custom filters can be written and loaded.

This is V2.

The main patch is patch 1.

The other patches add more functionality, except for patch 5 which installs
the C API header file.

Thanks! applied.

Please consider adding a 'perf test' entry to check if what is produced
is what is expected, also to exercise this code so that we get some
'perf test' segfault if we break something it uses somehow.

- Arnaldo
 

Changes in V2:
    perf script: Move filter_cpu() earlier
    perf script: Move filtering before scripting
    perf script: Share addr_al between functions
	Dropped because they have now been applied.

    perf script: Add API for filtering via dynamically loaded shared object
	Move 2 members of struct perf_dlfilter_sample
	Add 'ctx' as an argument to 'start' and 'stop'
	Find dlfilter .so files in current directory or exec-path/dlfilters

    perf script: Add option to list dlfilters
	New patch

    perf script: Add option to pass arguments to dlfilters
	New patch


Adrian Hunter (10):
      perf script: Add API for filtering via dynamically loaded shared object
      perf script: Add dlfilter__filter_event_early()
      perf script: Add option to list dlfilters
      perf script: Add option to pass arguments to dlfilters
      perf build: Install perf_dlfilter.h
      perf dlfilter: Add resolve_address() to perf_dlfilter_fns
      perf dlfilter: Add insn() to perf_dlfilter_fns
      perf dlfilter: Add srcline() to perf_dlfilter_fns
      perf dlfilter: Add attr() to perf_dlfilter_fns
      perf dlfilter: Add object_code() to perf_dlfilter_fns

 tools/perf/Documentation/perf-dlfilter.txt | 251 ++++++++++++
 tools/perf/Documentation/perf-script.txt   |  15 +-
 tools/perf/Makefile.config                 |   3 +
 tools/perf/Makefile.perf                   |   4 +-
 tools/perf/builtin-script.c                |  86 +++-
 tools/perf/util/Build                      |   1 +
 tools/perf/util/dlfilter.c                 | 615 +++++++++++++++++++++++++++++
 tools/perf/util/dlfilter.h                 |  97 +++++
 tools/perf/util/perf_dlfilter.h            | 150 +++++++
 9 files changed, 1211 insertions(+), 11 deletions(-)
 create mode 100644 tools/perf/Documentation/perf-dlfilter.txt
 create mode 100644 tools/perf/util/dlfilter.c
 create mode 100644 tools/perf/util/dlfilter.h
 create mode 100644 tools/perf/util/perf_dlfilter.h


Regards
Adrian

-- 

- Arnaldo