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    SubjectRe: [PATCH -tip v3 5/5] perf script: add option resolving vmlinux path
    On 08/11/2011 06:06 AM, Akihiro Nagai wrote:
    > Add the option get the path of [kernel.kallsyms].
    > Specify '--show-kernel-path' option to use this function.
    > This patch enables other applications to use this output easily.
    >
    > Without --show-kernel-path option
    >
    > # perf script -f ip,dso
    > ffffffff81467612 irq_return ([kernel.kallsyms])
    > ffffffff81467612 irq_return ([kernel.kallsyms])
    > 7f24fc02a6b3 _start (/lib64/ld-2.14.so)
    > [snip]
    >
    > With --show-kernel-path option
    >
    > # perf script -f ip,dso --show-kernel-path
    > ffffffff81467612 irq_return (/lib/modules/3.0.0+/build/vmlinux)
    > ffffffff81467612 irq_return (/lib/modules/3.0.0+/build/vmlinux)
    > 7f24fc02a6b3 _start (/lib64/ld-2.14.so)
    > [snip]
    >
    > Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
    > Cc: Peter Zijlstra <peterz@infradead.org>
    > Cc: Frederic Weisbecker <fweisbec@gmail.com>
    > Cc: Paul Mackerras <paulus@samba.org>
    > Cc: Ingo Molnar <mingo@elte.hu>
    > Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
    > Cc: David Ahern <dsahern@gmail.com>
    > Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
    > ---
    >
    > tools/perf/Documentation/perf-script.txt | 3 +++
    > tools/perf/builtin-script.c | 2 ++
    > tools/perf/util/map.c | 9 ++++++---
    > tools/perf/util/symbol.h | 1 +
    > 4 files changed, 12 insertions(+), 3 deletions(-)
    >
    > diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
    > index ee4d477..5383671 100644
    > --- a/tools/perf/Documentation/perf-script.txt
    > +++ b/tools/perf/Documentation/perf-script.txt
    > @@ -188,6 +188,9 @@ OPTIONS
    > CPUs are specified with -: 0-2. Default is to report samples on all
    > CPUs.
    >
    > +--show-kernel-path::
    > + Try to resolve the path of [kernel.kallsyms]
    > +
    > SEE ALSO
    > --------
    > linkperf:perf-record[1], linkperf:perf-script-perl[1],
    > diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
    > index 78797b3..ba5d3bb 100644
    > --- a/tools/perf/builtin-script.c
    > +++ b/tools/perf/builtin-script.c
    > @@ -1095,6 +1095,8 @@ static const struct option options[] = {
    > "addr,offs",
    > parse_output_fields),
    > OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
    > + OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
    > + "Show the path of [kernel.kallsyms]"),
    >
    > OPT_END()
    > };
    > diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
    > index 530a5ea..6ba4909 100644
    > --- a/tools/perf/util/map.c
    > +++ b/tools/perf/util/map.c
    > @@ -204,9 +204,12 @@ void map__print_dsoname(struct map *self)
    > {
    > const char *dsoname;
    >
    > - if (self && self->dso && self->dso->name)
    > - dsoname = self->dso->name;
    > - else
    > + if (self && self->dso && (self->dso->name || self->dso->long_name)) {
    > + if (symbol_conf.show_kernel_path && self->dso->long_name)
    > + dsoname = self->dso->long_name;
    > + else if (self->dso->name)
    > + dsoname = self->dso->name;
    > + } else
    > dsoname = "[unknown]";
    >
    > printf("%s", dsoname);
    > diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
    > index 554b2fe..3a63c92 100644
    > --- a/tools/perf/util/symbol.h
    > +++ b/tools/perf/util/symbol.h
    > @@ -69,6 +69,7 @@ struct strlist;
    > struct symbol_conf {
    > unsigned short priv_size;
    > bool try_vmlinux_path,
    > + show_kernel_path,
    > use_modules,
    > sort_by_name,
    > show_nr_samples,
    >

    Acked-By: David Ahern <dsahern@gmail.com>


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