Re: [GIT PULL] Probes update for v6.5

[Google]

Hi Linus,

Oops, I found the subject format was wrong. Let me resend it.

On Wed, 28 Jun 2023 00:58:18 +0900
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote:

> Hi Linus,
> 
> Probes updates for v6.5:
> 
> - fprobe: Pass return address to the fprobe entry/exit callbacks so that
>   the callbacks don't need to analyze pt_regs/stack to find the function
>   return address.
> 
> - kprobe events: cleanup usage of TPARG_FL_FENTRY and TPARG_FL_RETURN
>   flags so that those are not set at once.
> 
> - fprobe events:
>  . Add a new fprobe events for tracing arbitrary function entry and
>    exit as a trace event.
>  . Add a new tracepoint events for tracing raw tracepoint as a trace
>    event. This allows user to trace non user-exposed tracepoints.
>  . Move eprobe's event parser code into probe event common file.
>  . Introduce BTF (BPF type format) support to kernel probe (kprobe,
>    fprobe and tracepoint probe) events so that user can specify traced
>    function arguments by name. This also applies the type of argument
>    when fetching the argument.
>  . Introduce '$arg*' wildcard support if BTF is available. This expands
>    the '$arg*' meta argument to all function argument automatically.
>  . Check the return value types by BTF. If the function returns 'void',
>    '$retval' is rejected.
>  . Add some selftest script for fprobe events, tracepoint events and
>    BTF support.
>  . Update documentation about the fprobe events.
>  . Some fixes for above features, document and selftests.
> 
> - selftests for ftrace (except for new fprobe events):
>  . Add a test case for multiple consecutive probes in a function which
>    checks if ftrace based kprobe, optimized kprobe and normal kprobe
>    can be defined in the same target function.
>  . Add a test case for optimized probe, which checks whether kprobe
>    can be optimized or not.
> 
> 
> Please pull the latest probes-v6.5 tree, which can be found at:
> 
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
> probes-v6.5
> 
> Tag SHA1: 08bb7e2de7f32619cd100419e719ef96d6cf0aab
> Head SHA1: 53431798f4bb60d214ae1ec4a79eefdd414f577b
> 
> 
> Akanksha J N (2):
>       selftests/ftrace: Add new test case which adds multiple consecutive probes in a function
>       selftests/ftrace: Add new test case which checks for optimized probes
> 
> Masami Hiramatsu (Google) (15):
>       fprobe: Pass return address to the handlers
>       tracing/probes: Avoid setting TPARG_FL_FENTRY and TPARG_FL_RETURN
>       tracing/probes: Add fprobe events for tracing function entry and exit.
>       selftests/ftrace: Add fprobe related testcases
>       tracing/probes: Add tracepoint support on fprobe_events
>       tracing/probes: Move event parameter fetching code to common parser
>       tracing/probes: Support function parameters if BTF is available
>       tracing/probes: Add $arg* meta argument for all function args
>       tracing/probes: Add BTF retval type support
>       selftests/ftrace: Add tracepoint probe test case
>       selftests/ftrace: Add BTF arguments test cases
>       Documentation: tracing/probes: Add fprobe event tracing document
>       tracing/probes: Fix to return NULL and keep using current argc
>       Documentation: Fix typo of reference file name
>       tracing/probes: Fix tracepoint event with $arg* to fetch correct argument
> 
> ----
>  Documentation/trace/fprobetrace.rst                |  188 +++
>  Documentation/trace/index.rst                      |    1 +
>  Documentation/trace/kprobetrace.rst                |    2 +
>  include/linux/fprobe.h                             |   11 +-
>  include/linux/rethook.h                            |    2 +-
>  include/linux/trace_events.h                       |    3 +
>  include/linux/tracepoint-defs.h                    |    1 +
>  include/linux/tracepoint.h                         |    5 +
>  kernel/kprobes.c                                   |    1 +
>  kernel/trace/Kconfig                               |   26 +
>  kernel/trace/Makefile                              |    1 +
>  kernel/trace/bpf_trace.c                           |    6 +-
>  kernel/trace/fprobe.c                              |   17 +-
>  kernel/trace/rethook.c                             |    3 +-
>  kernel/trace/trace.c                               |   13 +-
>  kernel/trace/trace.h     Linus,
> 
> Probes updates for v6.5:
> 
> - fprobe: Pass return address to the fprobe entry/exit callbacks so that
>   the callbacks don't need to analyze pt_regs/stack to find the function
>   return address.
> 
> - kprobe events: cleanup usage of TPARG_FL_FENTRY and TPARG_FL_RETURN
>   flags so that those are not set at once.
> 
> - fprobe events:
>  . Add a new fprobe events for tracing arbitrary function entry and
>    exit as a trace event.
>  . Add a new tracepoint events for tracing raw tracepoint as a trace
>    event. This allows user to trace non user-exposed tracepoints.
>  . Move eprobe's event parser code into probe event common file.
>  . Introduce BTF (BPF type format) support to kernel probe (kprobe,
>    fprobe and tracepoint probe) events so that user can specify traced
>    function arguments by name. This also applies the type of argument
>    when fetching the argument.
>  . Introduce '$arg*' wildcard support if BTF is available. This expands
>    the '$arg*' meta argument to all function argument automatically.
>  . Check the return value types by BTF. If the function returns 'void',
>    '$retval' is rejected.
>  . Add some selftest script for fprobe events, tracepoint events and
>    BTF support.
>  . Update documentation about the fprobe events.
>  . Some fixes for above features, document and selftests.
> 
> - selftests for ftrace (except for new fprobe events):
>  . Add a test case for multiple consecutive probes in a function which
>    checks if ftrace based kprobe, optimized kprobe and normal kprobe
>    can be defined in the same target function.
>  . Add a test case for optimized probe, which checks whether kprobe
>    can be optimized or not.
> 
> 
> Please pull the latest probes-v6.5 tree, which can be found at:
> 
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
> probes-v6.5
> 
> Tag SHA1: 08bb7e2de7f32619cd100419e719ef96d6cf0aab
> Head SHA1: 53431798f4bb60d214ae1ec4a79eefdd414f577b
> 
> 
> Akanksha J N (2):
>       selftests/ftrace: Add new test case which adds multiple consecutive probes in a function
>       selftests/ftrace: Add new test case which checks for optimized probes
> 
> Masami Hiramatsu (Google) (15):
>       fprobe: Pass return address to the handlers
>       tracing/probes: Avoid setting TPARG_FL_FENTRY and TPARG_FL_RETURN
>       tracing/probes: Add fprobe events for tracing function entry and exit.
>       selftests/ftrace: Add fprobe related testcases
>       tracing/probes: Add tracepoint support on fprobe_events
>       tracing/probes: Move event parameter fetching code to common parser
>       tracing/probes: Support function parameters if BTF is available
>       tracing/probes: Add $arg* meta argument for all function args
>       tracing/probes: Add BTF retval type support
>       selftests/ftrace: Add tracepoint probe test case
>       selftests/ftrace: Add BTF arguments test cases
>       Documentation: tracing/probes: Add fprobe event tracing document
>       tracing/probes: Fix to return NULL and keep using current argc
>       Documentation: Fix typo of reference file name
>       tracing/probes: Fix tracepoint event with $arg* to fetch correct argument
> 
> ----
>  Documentation/trace/fprobetrace.rst                |  188 +++
>  Documentation/trace/index.rst                      |    1 +
>  Documentation/trace/kprobetrace.rst                |    2 +
>  include/linux/fprobe.h                             |   11 +-
>  include/linux/rethook.h                            |    2 +-
>  include/linux/trace_events.h                       |    3 +
>  include/linux/tracepoint-defs.h                    |    1 +
>  include/linux/tracepoint.h                         |    5 +
>  kernel/kprobes.c                                   |    1 +
>  kernel/trace/Kconfig                               |   26 +
>  kernel/trace/Makefile                              |    1 +
>  kernel/trace/bpf_trace.c                           |    6 +-
>  kernel/trace/fprobe.c                              |   17 +-
>  kernel/trace/rethook.c                             |    3 +-
>  kernel/trace/trace.c                               |   13 +-
>  kernel/trace/trace.h                               |   11 +
>  kernel/trace/trace_eprobe.c                        |   44 +-
>  kernel/trace/trace_fprobe.c                        | 1199 ++++++++++++++++++++
>  kernel/trace/trace_kprobe.c                        |   35 +-
>  kernel/trace/trace_probe.c                         |  659 +++++++++--
>  kernel/trace/trace_probe.h                         |   49 +-
>  kernel/trace/trace_uprobe.c                        |    8 +-
>  lib/test_fprobe.c                                  |   10 +-
>  samples/fprobe/fprobe_example.c                    |    6 +-
>  .../ftrace/test.d/dynevent/add_remove_btfarg.tc    |   58 +
>  .../ftrace/test.d/dynevent/add_remove_fprobe.tc    |   26 +
>  .../ftrace/test.d/dynevent/add_remove_tprobe.tc    |   27 +
>  .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc |  111 ++
>  .../ftrace/test.d/dynevent/tprobe_syntax_errors.tc |   82 ++
>  .../ftrace/test.d/kprobe/kprobe_insn_boundary.tc   |   19 +
>  .../ftrace/test.d/kprobe/kprobe_opt_types.tc       |   34 +
>  .../ftrace/test.d/kprobe/kprobe_syntax_errors.tc   |   16 +-
>  32 files changed, 2510 insertions(+), 164 deletions(-)
>  create mode 100644 Documentation/trace/fprobetrace.rst
>  create mode 100644 kernel/trace/trace_fprobe.c
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_insn_boundary.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc                          |   11 +
>  kernel/trace/trace_eprobe.c                        |   44 +-
>  kernel/trace/trace_fprobe.c                        | 1199 ++++++++++++++++++++
>  kernel/trace/trace_kprobe.c                        |   35 +-
>  kernel/trace/trace_probe.c                         |  659 +++++++++--
>  kernel/trace/trace_probe.h                         |   49 +-
>  kernel/trace/trace_uprobe.c                        |    8 +-
>  lib/test_fprobe.c                                  |   10 +-
>  samples/fprobe/fprobe_example.c                    |    6 +-
>  .../ftrace/test.d/dynevent/add_remove_btfarg.tc    |   58 +
>  .../ftrace/test.d/dynevent/add_remove_fprobe.tc    |   26 +
>  .../ftrace/test.d/dynevent/add_remove_tprobe.tc    |   27 +
>  .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc |  111 ++
>  .../ftrace/test.d/dynevent/tprobe_syntax_errors.tc |   82 ++
>  .../ftrace/test.d/kprobe/kprobe_insn_boundary.tc   |   19 +
>  .../ftrace/test.d/kprobe/kprobe_opt_types.tc       |   34 +
>  .../ftrace/test.d/kprobe/kprobe_syntax_errors.tc   |   16 +-
>  32 files changed, 2510 insertions(+), 164 deletions(-)
>  create mode 100644 Documentation/trace/fprobetrace.rst
>  create mode 100644 kernel/trace/trace_fprobe.c
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_insn_boundary.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc
> 
> -- 
> Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>


-- 
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>