Messages in this thread Patch in this message | | | Date | Tue, 28 Jun 2011 08:52:00 -0600 | From | David Ahern <> | Subject | Re: [PATCH -tip 3/4] perf script: add the option to show the offset of symbols |
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On 06/28/2011 01:40 AM, Akihiro Nagai wrote: > Add the option '--show-symbol-offset' to show the offset from > the symbols in the output of perf-script. We can get the more > detailed address information.
I like the offset option; added that locally last week as well. more below.
> > Output sample: > # perf script -f ip,addr,sym --show-symbol-offset > 301ec016b0 ffffffff81467612 irq_return+0x0 > 301ec016b0 _start+0x0 ffffffff81467612 irq_return+0x0 > 301ec04b70 _dl_start+0x0 301ec016b3 _start+0x3 > 301ec04b70 _dl_start+0x0 ffffffff81467612 irq_return+0x0 > 301ec04b96 _dl_start+0x26 ffffffff81467612 irq_return+0x0 > 301ec04b9d _dl_start+0x2d ffffffff81467612 irq_return+0x0 > 301ec04c0d _dl_start+0x9d 301ec04beb _dl_start+0x7b > 301ec04bf0 _dl_start+0x80 301ec04c11 _dl_start+0xa1 > [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 | 20 ++++++++++++++------ > tools/perf/util/session.c | 16 ++++++++++------ > tools/perf/util/session.h | 3 ++- > 4 files changed, 29 insertions(+), 13 deletions(-) > > diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt > index c6068cb..39c4721 100644 > --- a/tools/perf/Documentation/perf-script.txt > +++ b/tools/perf/Documentation/perf-script.txt > @@ -182,6 +182,9 @@ OPTIONS > --hide-call-graph:: > When printing symbols do not display call chain. > > +--show-symbol-offset:: > + Show the offset of the symbols. > + > 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 2d68086..f9b7047 100644 > --- a/tools/perf/builtin-script.c > +++ b/tools/perf/builtin-script.c > @@ -21,6 +21,7 @@ static u64 last_timestamp; > static u64 nr_unordered; > extern const struct option record_options[]; > static bool no_callchain; > +static bool show_symbol_offset; > > enum perf_output_field { > PERF_OUTPUT_COMM = 1U << 0, > @@ -324,6 +325,7 @@ static void print_sample_addr(union perf_event *event, > struct addr_location al; > u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; > const char *symname, *dsoname; > + unsigned long offset; > > printf("%16" PRIx64, sample->addr); > > @@ -346,12 +348,15 @@ static void print_sample_addr(union perf_event *event, > al.sym = map__find_symbol(al.map, al.addr, NULL); > > if (PRINT_FIELD(SYM)) { > - if (al.sym && al.sym->name) > + printf(" "); > + if (al.sym && al.sym->name) { > symname = al.sym->name; > - else > - symname = "";
dropping the else path will cause columns to misalign when ip's do not resolve.
> - > - printf(" %16s", symname); > + offset = al.addr - al.sym->start;
move the offset calculation under the if (show_symbol_offset)
> + if (show_symbol_offset) > + printf("%16s+0x%lx", symname, offset); > + else > + printf("%16s", symname); > + } > } > > if (PRINT_FIELD(DSO)) { > @@ -390,7 +395,8 @@ static void process_event(union perf_event *event __unused, > else > printf("\n"); > perf_session__print_ip(event, sample, session, > - PRINT_FIELD(SYM), PRINT_FIELD(DSO)); > + PRINT_FIELD(SYM), PRINT_FIELD(DSO), > + show_symbol_offset); > } > > printf("\n"); > @@ -1084,6 +1090,8 @@ static const struct option options[] = { > OPT_CALLBACK('f', "fields", NULL, "str", > "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr", > parse_output_fields), > + OPT_BOOLEAN('\0', "show-symbol-offset", &show_symbol_offset, > + "Show the offset of the symbol."), > > OPT_END() > }; > diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c > index 632266f..bb522ed 100644 > --- a/tools/perf/util/session.c > +++ b/tools/perf/util/session.c > @@ -1205,10 +1205,11 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, > void perf_session__print_ip(union perf_event *event, > struct perf_sample *sample, > struct perf_session *session, > - int print_sym, int print_dso) > + int print_sym, int print_dso, int print_offset) > { > struct addr_location al; > const char *symname, *dsoname; > + unsigned long offset; > struct callchain_cursor *cursor = &session->callchain_cursor; > struct callchain_cursor_node *node; > > @@ -1259,12 +1260,15 @@ void perf_session__print_ip(union perf_event *event, > } else { > printf("%16" PRIx64, sample->ip); > if (print_sym) { > - if (al.sym && al.sym->name) > + printf(" "); > + if (al.sym && al.sym->name) { > symname = al.sym->name; > - else > - symname = ""; > - > - printf(" %s", symname); > + offset = al.addr - al.sym->start; > + if (print_offset) > + printf("%s+0x%lx", symname, offset);
same comments for this code path.
David
> + else > + printf("%s", symname); > + } > } > > if (print_dso) { > diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h > index de4178d..8187e68 100644 > --- a/tools/perf/util/session.h > +++ b/tools/perf/util/session.h > @@ -170,6 +170,7 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, > void perf_session__print_ip(union perf_event *event, > struct perf_sample *sample, > struct perf_session *session, > - int print_sym, int print_dso); > + int print_sym, int print_dso, > + int print_offset); > > #endif /* __PERF_SESSION_H */ >
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