On Tue, 16 Jul 2019 19:12:59 +0800 Leo Yan <leo.yan@xxxxxxxxxx> wrote: > This small patch set is to add support for function error injection; > this can be used to eanble more advanced debugging feature, e.g. > CONFIG_BPF_KPROBE_OVERRIDE. > > I only tested the first patch on arm64 platform Juno-r2 with below > steps; the second patch is for arm arch, but I absent the platform > for the testing so only pass compilation. > > - Enable kernel configuration: > CONFIG_BPF_KPROBE_OVERRIDE > CONFIG_BTRFS_FS > CONFIG_BPF_EVENTS=y > CONFIG_KPROBES=y > CONFIG_KPROBE_EVENTS=y > CONFIG_BPF_KPROBE_OVERRIDE=y > - Build samples/bpf on Juno-r2 board with Debian rootFS: > # cd $kernel > # make headers_install > # make samples/bpf/ LLC=llc-7 CLANG=clang-7 > - Run the sample tracex7: > # ./tracex7 /dev/sdb1 > [ 1975.211781] BTRFS error (device (efault)): open_ctree failed > mount: /mnt/linux-kernel/linux-cs-dev/samples/bpf/tmpmnt: mount(2) system call failed: Cannot allocate memory. This series looks good to me from the view point of override usage :) Reviewed-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> For this series. Thank you, > > > Leo Yan (2): > arm64: Add support for function error injection > arm: Add support for function error injection > > arch/arm/Kconfig | 1 + > arch/arm/include/asm/error-injection.h | 13 +++++++++++++ > arch/arm/include/asm/ptrace.h | 5 +++++ > arch/arm/lib/Makefile | 2 ++ > arch/arm/lib/error-inject.c | 19 +++++++++++++++++++ > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/error-injection.h | 13 +++++++++++++ > arch/arm64/include/asm/ptrace.h | 5 +++++ > arch/arm64/lib/Makefile | 2 ++ > arch/arm64/lib/error-inject.c | 19 +++++++++++++++++++ > 10 files changed, 80 insertions(+) > create mode 100644 arch/arm/include/asm/error-injection.h > create mode 100644 arch/arm/lib/error-inject.c > create mode 100644 arch/arm64/include/asm/error-injection.h > create mode 100644 arch/arm64/lib/error-inject.c > > -- > 2.17.1 > -- Masami Hiramatsu <mhiramat@xxxxxxxxxx>
