Messages in this thread Patch in this message | | | From | Akihiro Nagai <> | Subject | [PATCH -tip v4 4/5] perf script: add the offset field specifier | Date | Mon, 16 Jan 2012 14:22:28 +0900 |
| |
Add the offset field specifier 'offs' to show the offset from the symbols in the output of perf-script. We can get the more detailed address information.
Output sample: # perf script -f ip,addr,sym,offs 301ec016b0 _start+0x0 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]
Changes in v2: - change the way to output offset from '--show-symbol-offset' to 'offs' field. - clean up codes.
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 | 2 +- tools/perf/builtin-script.c | 20 +++++++++++++++++--- tools/perf/util/session.c | 7 +++++-- tools/perf/util/session.h | 2 +- tools/perf/util/symbol.c | 22 +++++++++++++++------- tools/perf/util/symbol.h | 2 ++ 6 files changed, 41 insertions(+), 14 deletions(-)
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 2f6cef4..477638a 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -115,7 +115,7 @@ OPTIONS -f:: --fields:: Comma separated list of fields to print. Options are: - comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr. + comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, offs. Field list can be prepended with the type, trace, sw or hw, to indicate to which event type the field list applies. e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 360a4da..e79ec7d 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -40,6 +40,7 @@ enum perf_output_field { PERF_OUTPUT_SYM = 1U << 8, PERF_OUTPUT_DSO = 1U << 9, PERF_OUTPUT_ADDR = 1U << 10, + PERF_OUTPUT_OFFSET = 1U << 11, }; struct output_option { @@ -57,6 +58,7 @@ struct output_option { {.str = "sym", .field = PERF_OUTPUT_SYM}, {.str = "dso", .field = PERF_OUTPUT_DSO}, {.str = "addr", .field = PERF_OUTPUT_ADDR}, + {.str = "offs", .field = PERF_OUTPUT_OFFSET}, }; /* default set to maintain compatibility with current format */ @@ -193,6 +195,11 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel, "to symbols.\n"); return -EINVAL; } + if (PRINT_FIELD(OFFSET) && !PRINT_FIELD(SYM)) { + pr_err("Display of offsets requested but symbol is not" + "selected.\n"); + return -EINVAL; + } if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) { pr_err("Display of DSO requested but neither sample IP nor " "sample address\nis selected. Hence, no addresses to convert " @@ -349,7 +356,10 @@ static void print_sample_addr(union perf_event *event, if (PRINT_FIELD(SYM)) { printf(" "); - symbol__print_symname(al.sym); + if (PRINT_FIELD(OFFSET)) + symbol__print_symname_offs(al.sym, &al); + else + symbol__print_symname(al.sym); } if (PRINT_FIELD(DSO)) { @@ -385,7 +395,8 @@ static void process_event(union perf_event *event __unused, else printf("\n"); perf_event__print_ip(event, sample, machine, evsel, - PRINT_FIELD(SYM), PRINT_FIELD(DSO)); + PRINT_FIELD(SYM), PRINT_FIELD(DSO), + PRINT_FIELD(OFFSET)); } printf("\n"); @@ -1095,7 +1106,10 @@ static const struct option options[] = { OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", "Look for files with symbols relative to this directory"), 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", + "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,offs", parse_output_fields), OPT_BOOLEAN('a', "all-cpus", &system_wide, "system-wide collection from all CPUs"), diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index aad26b3..c4d1e8b 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1293,7 +1293,7 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, struct machine *machine, struct perf_evsel *evsel, - int print_sym, int print_dso) + int print_sym, int print_dso, int print_offset) { struct addr_location al; struct callchain_cursor *cursor = &evsel->hists.callchain_cursor; @@ -1340,7 +1340,10 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, printf("%16" PRIx64, sample->ip); if (print_sym) { printf(" "); - symbol__print_symname(al.sym); + if (print_offset) + symbol__print_symname_offs(al.sym, &al); + else + symbol__print_symname(al.sym); } if (print_dso) { diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index 37bc383..12b98bf 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -147,7 +147,7 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, struct machine *machine, struct perf_evsel *evsel, - int print_sym, int print_dso); + int print_sym, int print_dso, int print_offset); int perf_session__cpu_bitmap(struct perf_session *session, const char *cpu_list, unsigned long *cpu_bitmap); diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 7d1fb3a..4056d36 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -264,16 +264,24 @@ static size_t symbol__fprintf(struct symbol *sym, FILE *fp) sym->name); } -void symbol__print_symname(const struct symbol *sym) +void symbol__print_symname_offs(const struct symbol *sym, + const struct addr_location *al) { - const char *symname; + unsigned long offset; - if (sym && sym->name) - symname = sym->name; - else - symname = "[unknown]"; + if (sym && sym->name) { + printf("%s", sym->name); + if (al) { + offset = al->addr - sym->start; + printf("+0x%lx", offset); + } + } else + printf("[unknown]"); +} - printf("%s", symname); +void symbol__print_symname(const struct symbol *sym) +{ + symbol__print_symname_offs(sym, NULL); } void dso__set_long_name(struct dso *dso, char *name) diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 26be235..280f477 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -241,6 +241,8 @@ void machines__destroy_guest_kernel_maps(struct rb_root *machines); int symbol__init(void); void symbol__exit(void); +void symbol__print_symname_offs(const struct symbol *sym, + const struct addr_location *al); void symbol__print_symname(const struct symbol *sym); bool symbol_type__is_a(char symbol_type, enum map_type map_type);
| |