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@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. 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@xxxxxxxxxx>
