Re: [PATCH v12 bpf-next 00/12] fprobe: Introduce fprobe function entry/exit probe

[Masami Hiramatsu]

On Tue, 15 Mar 2022 23:00:14 +0900
Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:

> Hi,
> 
> Here is the 12th version of fprobe. This version fixes a possible gcc-11 issue which
> was reported as kretprobes on arm issue, and also I updated the fprobe document.

Here is the gcc-11 build issue thread for reference.

https://lore.kernel.org/all/202203150516.KTorSVVU-lkp@xxxxxxxxx/T/#u

Thank you,

> 
> The previous version (v11) is here[1];
> 
> [1] https://lore.kernel.org/all/164701432038.268462.3329725152949938527.stgit@devnote2/T/#u
> 
> This series introduces the fprobe, the function entry/exit probe
> with multiple probe point support for x86, arm64 and powerpc64le.
> This also introduces the rethook for hooking function return as same as
> the kretprobe does. This abstraction will help us to generalize the fgraph
> tracer, because we can just switch to it from the rethook in fprobe,
> depending on the kernel configuration.
> 
> The patch [1/12] is from Jiri's series[2].
> 
> [2] https://lore.kernel.org/all/20220104080943.113249-1-jolsa@xxxxxxxxxx/T/#u
> 
> And the patch [9/10] adds the FPROBE_FL_KPROBE_SHARED flag for the case
> if user wants to share the same code (or share a same resource) on the
> fprobe and the kprobes.
> 
> I forcibly updated my kprobes/fprobe branch, you can pull this series
> from:
> 
>  https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git kprobes/fprobe
> 
> Thank you,
> 
> ---
> 
> Jiri Olsa (1):
>       ftrace: Add ftrace_set_filter_ips function
> 
> Masami Hiramatsu (11):
>       fprobe: Add ftrace based probe APIs
>       rethook: Add a generic return hook
>       rethook: x86: Add rethook x86 implementation
>       arm64: rethook: Add arm64 rethook implementation
>       powerpc: Add rethook support
>       ARM: rethook: Add rethook arm implementation
>       fprobe: Add exit_handler support
>       fprobe: Add sample program for fprobe
>       fprobe: Introduce FPROBE_FL_KPROBE_SHARED flag for fprobe
>       docs: fprobe: Add fprobe description to ftrace-use.rst
>       fprobe: Add a selftest for fprobe
> 
> 
>  Documentation/trace/fprobe.rst                |  174 +++++++++++++
>  Documentation/trace/index.rst                 |    1 
>  arch/arm/Kconfig                              |    1 
>  arch/arm/include/asm/stacktrace.h             |    4 
>  arch/arm/kernel/stacktrace.c                  |    6 
>  arch/arm/probes/Makefile                      |    1 
>  arch/arm/probes/rethook.c                     |  103 ++++++++
>  arch/arm64/Kconfig                            |    1 
>  arch/arm64/include/asm/stacktrace.h           |    2 
>  arch/arm64/kernel/probes/Makefile             |    1 
>  arch/arm64/kernel/probes/rethook.c            |   25 ++
>  arch/arm64/kernel/probes/rethook_trampoline.S |   87 +++++++
>  arch/arm64/kernel/stacktrace.c                |    7 -
>  arch/powerpc/Kconfig                          |    1 
>  arch/powerpc/kernel/Makefile                  |    1 
>  arch/powerpc/kernel/rethook.c                 |   72 +++++
>  arch/x86/Kconfig                              |    1 
>  arch/x86/include/asm/unwind.h                 |    8 +
>  arch/x86/kernel/Makefile                      |    1 
>  arch/x86/kernel/kprobes/common.h              |    1 
>  arch/x86/kernel/rethook.c                     |  119 +++++++++
>  include/linux/fprobe.h                        |  105 ++++++++
>  include/linux/ftrace.h                        |    3 
>  include/linux/kprobes.h                       |    3 
>  include/linux/rethook.h                       |  100 ++++++++
>  include/linux/sched.h                         |    3 
>  kernel/exit.c                                 |    2 
>  kernel/fork.c                                 |    3 
>  kernel/trace/Kconfig                          |   26 ++
>  kernel/trace/Makefile                         |    2 
>  kernel/trace/fprobe.c                         |  332 +++++++++++++++++++++++++
>  kernel/trace/ftrace.c                         |   58 ++++
>  kernel/trace/rethook.c                        |  317 ++++++++++++++++++++++++
>  lib/Kconfig.debug                             |   12 +
>  lib/Makefile                                  |    2 
>  lib/test_fprobe.c                             |  174 +++++++++++++
>  samples/Kconfig                               |    7 +
>  samples/Makefile                              |    1 
>  samples/fprobe/Makefile                       |    3 
>  samples/fprobe/fprobe_example.c               |  120 +++++++++
>  40 files changed, 1876 insertions(+), 14 deletions(-)
>  create mode 100644 Documentation/trace/fprobe.rst
>  create mode 100644 arch/arm/probes/rethook.c
>  create mode 100644 arch/arm64/kernel/probes/rethook.c
>  create mode 100644 arch/arm64/kernel/probes/rethook_trampoline.S
>  create mode 100644 arch/powerpc/kernel/rethook.c
>  create mode 100644 arch/x86/kernel/rethook.c
>  create mode 100644 include/linux/fprobe.h
>  create mode 100644 include/linux/rethook.h
>  create mode 100644 kernel/trace/fprobe.c
>  create mode 100644 kernel/trace/rethook.c
>  create mode 100644 lib/test_fprobe.c
>  create mode 100644 samples/fprobe/Makefile
>  create mode 100644 samples/fprobe/fprobe_example.c
> 
> --
> Masami Hiramatsu (Linaro) <mhiramat@xxxxxxxxxx>


-- 
Masami Hiramatsu <mhiramat@xxxxxxxxxx>