ping? On Fri, 26 Aug 2016 01:24:10 +0900 Masami Hiramatsu <mhira...@kernel.org> wrote:
> Hi, > > Here is the 2nd version of remote cross-arch probe support on perf-probe. > V1 is here: > https://lkml.org/lkml/2016/8/24/29 > > Currently perf-probe doesn't supoort cross/remote target. This means > we have to cross-build the perf-tools including libraries (elfutils, > libelf etc.), and to prepare vmlinux with debuginfo which can be > accessed from the target machine. > This requires too much resource for a small embededd device. > > If we can analyze the debuginfo by perf-probe on host machine, > we do not need to cross-build perf-tools, nor copy vmlinux on the > device. :) > > For that purpose, this series adds --definition(-D) command for > perf-probe, which shows trace event definition instead of adding > it in running kernel, according to Arnaldo's comment. > Using -D with --vmlinux(or -k)=OFFLINE-VMLINUX, perf-probe reads > the vmlinux architecture and show definition with correct > dwarf-registers. > > perf probe -k <cross-vmlinux> -D <probe-point> <arguments> > > Here is an example: > ----- > $ perf probe --vmlinux=./vmlinux-arm --definition 'do_sys_open $params' > p:probe/do_sys_open do_sys_open+0 dfd=%r5:s32 filename=%r1:u32 > flags=%r6:s32 mode=%r3:u16 > ----- > Here, we can get probe/do_sys_open event by "copy & paste" the > definition to target-machine's debugfs/tracing/kprobe_events. > > Note that it shows definition with direct symbol name instead of > _text+offset. It is treated as an offline module. > > Thanks, > --- > > Masami Hiramatsu (3): > perf-probe: Show trace event definition > perf-probe: Ignore vmlinux buildid if offline kernel is given > perf-probe: Support probing on offline cross-arch binary > > > tools/perf/Documentation/perf-probe.txt | 9 +++ > tools/perf/arch/arm/include/dwarf-regs-table.h | 9 +++ > tools/perf/arch/arm64/include/dwarf-regs-table.h | 13 +++++ > tools/perf/arch/powerpc/include/dwarf-regs-table.h | 27 ++++++++++ > tools/perf/arch/s390/include/dwarf-regs-table.h | 8 +++ > tools/perf/arch/sh/include/dwarf-regs-table.h | 25 +++++++++ > tools/perf/arch/sparc/include/dwarf-regs-table.h | 18 +++++++ > tools/perf/arch/x86/include/dwarf-regs-table.h | 14 +++++ > tools/perf/arch/xtensa/include/dwarf-regs-table.h | 8 +++ > tools/perf/builtin-probe.c | 34 ++++++++++-- > tools/perf/util/Build | 1 > tools/perf/util/dwarf-regs.c | 55 > ++++++++++++++++++++ > tools/perf/util/include/dwarf-regs.h | 6 ++ > tools/perf/util/probe-event.c | 50 ++++++++++++++++++ > tools/perf/util/probe-event.h | 1 > tools/perf/util/probe-finder.c | 27 ++++++---- > tools/perf/util/probe-finder.h | 1 > tools/perf/util/symbol-elf.c | 2 - > 18 files changed, 289 insertions(+), 19 deletions(-) > create mode 100644 tools/perf/arch/arm/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/arm64/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/powerpc/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/s390/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/sh/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/sparc/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/x86/include/dwarf-regs-table.h > create mode 100644 tools/perf/arch/xtensa/include/dwarf-regs-table.h > create mode 100644 tools/perf/util/dwarf-regs.c > > -- > Masami Hiramatsu (Linaro Ltd.) <mhira...@kernel.org> -- Masami Hiramatsu <mhira...@kernel.org>
