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Date: Tue, 15 Mar 2022 23:42:14 +0900
From: Masami Hiramatsu <mhiramat@...nel.org>
To: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
Andrii Nakryiko <andrii.nakryiko@...il.com>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>, netdev@...r.kernel.org,
bpf@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
"Naveen N . Rao" <naveen.n.rao@...ux.ibm.com>,
Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
"David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH v12 bpf-next 00/12] fprobe: Introduce fprobe function
entry/exit probe
On Tue, 15 Mar 2022 23:00:14 +0900
Masami Hiramatsu <mhiramat@...nel.org> 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@intel.com/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@kernel.org/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@...nel.org>
--
Masami Hiramatsu <mhiramat@...nel.org>
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