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perf script: Add the offset field specifier 

Add the offset field specifier 'symoff' to show the offset from
the symbols in the output of perf-script. We can get the more
detailed address information.

Output sample:
ffffffff81467612 irq_return+0x0 => 301ec016b0 _start+0x0
ffffffff81467612 irq_return+0x0 => 301ec016b0 _start+0x0
      301ec016b3 _start+0x3     => 301ec04b70 _dl_start+0x0
ffffffff81467612 irq_return+0x0 => 301ec04b70 _dl_start+0x0
ffffffff81467612 irq_return+0x0 => 301ec04b96 _dl_start+0x26
ffffffff81467612 irq_return+0x0 => 301ec04b9d _dl_start+0x2d
      301ec04beb _dl_start+0x7b => 301ec04c0d _dl_start+0x9d
      301ec04c11 _dl_start+0xa1 => 301ec04bf0 _dl_start+0x80
[snip]

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20120130044314.2384.67094.stgit@linux3
Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Akihiro Nagai 2012-01-30 13:43:15 +09:00 committed by Arnaldo Carvalho de Melo
parent 9558259697
commit a978f2ab41
6 changed files with 47 additions and 16 deletions
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2
tools/perf/Documentation/perf-script.txt
View File

@ -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, symoff.
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

23
tools/perf/builtin-script.c
View File

@ -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_SYMOFFSET = 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 = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
};
/* 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(SYMOFFSET) && !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 "
@ -353,7 +360,10 @@ static void print_sample_addr(union perf_event *event,
if (PRINT_FIELD(SYM)) {
printf(" ");
symbol__fprintf_symname(al.sym, stdout);
if (PRINT_FIELD(SYMOFFSET))
symbol__fprintf_symname_offs(al.sym, &al, stdout);
else
symbol__fprintf_symname(al.sym, stdout);
}
if (PRINT_FIELD(DSO)) {
@ -378,7 +388,8 @@ static void print_sample_bts(union perf_event *event,
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(SYMOFFSET));
}
printf(" => ");
@ -421,7 +432,8 @@ 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(SYMOFFSET));
}
printf("\n");
@ -1131,7 +1143,10 @@ 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,symoff",
parse_output_fields),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),

8
tools/perf/util/session.c
View File

@ -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_symoffset)
{
struct addr_location al;
struct callchain_cursor *cursor = &evsel->hists.callchain_cursor;
@ -1340,7 +1340,11 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
printf("%16" PRIx64, sample->ip);
if (print_sym) {
printf(" ");
symbol__fprintf_symname(al.sym, stdout);
if (print_symoffset)
symbol__fprintf_symname_offs(al.sym, &al,
stdout);
else
symbol__fprintf_symname(al.sym, stdout);
}
if (print_dso) {

2
tools/perf/util/session.h
View File

@ -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_symoffset);
int perf_session__cpu_bitmap(struct perf_session *session,
const char *cpu_list, unsigned long *cpu_bitmap);

26
tools/perf/util/symbol.c
View File

@ -263,16 +263,26 @@ static size_t symbol__fprintf(struct symbol *sym, FILE *fp)
sym->name);
}
size_t symbol__fprintf_symname_offs(const struct symbol *sym,
const struct addr_location *al, FILE *fp)
{
unsigned long offset;
size_t length;
if (sym && sym->name) {
length = fprintf(fp, "%s", sym->name);
if (al) {
offset = al->addr - sym->start;
length += fprintf(fp, "+0x%lx", offset);
}
return length;
} else
return fprintf(fp, "[unknown]");
}
size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp)
{
const char *symname;
if (sym && sym->name)
symname = sym->name;
else
symname = "[unknown]";
return fprintf(fp, "%s", symname);
return symbol__fprintf_symname_offs(sym, NULL, fp);
}
void dso__set_long_name(struct dso *dso, char *name)

2
tools/perf/util/symbol.h
View File

@ -241,6 +241,8 @@ void machines__destroy_guest_kernel_maps(struct rb_root *machines);
int symbol__init(void);
void symbol__exit(void);
size_t symbol__fprintf_symname_offs(const struct symbol *sym,
const struct addr_location *al, FILE *fp);
size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
bool symbol_type__is_a(char symbol_type, enum map_type map_type);