[PATCH v7 00/10] fprobe: Introduce fprobe function entry/exit probe

Masami Hiramatsu
2022-01-31T05:00:14Z

Hi,

Here is the 7th version of fprobe. This version fixes unregister_fprobe()
ensures that exit_handler is not called after returning from the
unregister_fprobe(), and fixes some comments and documents.

The previous version is here[1];

[1] https://lore.kernel.org/all/164338031590.2429999.6203979005944292576.stgit@devnote2/T/#u

This series introduces the fprobe, the function entry/exit probe
with multiple probe point support. 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 [1/10] 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.

Thank you,

---

Jiri Olsa (1):
ftrace: Add ftrace_set_filter_ips function

Masami Hiramatsu (9):
fprobe: Add ftrace based probe APIs
rethook: Add a generic return hook
rethook: x86: Add rethook x86 implementation
ARM: rethook: Add rethook arm implementation
arm64: rethook: Add arm64 rethook 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

Documentation/trace/fprobe.rst | 171 +++++++++++++
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 | 71 +++++
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/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 | 115 ++++++++
include/linux/fprobe.h | 97 +++++++
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 | 341 +++++++++++++++++++++++++
kernel/trace/ftrace.c | 58 ++++
kernel/trace/rethook.c | 313 +++++++++++++++++++++++
samples/Kconfig | 7 +
samples/Makefile | 1
samples/fprobe/Makefile | 3
samples/fprobe/fprobe_example.c | 120 +++++++++
34 files changed, 1572 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/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 samples/fprobe/Makefile
create mode 100644 samples/fprobe/fprobe_example.c

--
Masami Hiramatsu (Linaro) <mhiramat@kernel.org>