Commit a978f2ab authored by Akihiro Nagai's avatar Akihiro Nagai Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarAkihiro Nagai <akihiro.nagai.hw@hitachi.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 95582596

tools/perf/Documentation/perf-script.txt

+1 −1
Original line number Diff line number Diff line
@@ -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

tools/perf/builtin-script.c

+19 −4
Original line number Diff line number Diff line
@@ -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 "
@@ -353,6 +360,9 @@ static void print_sample_addr(union perf_event *event, 


	if (PRINT_FIELD(SYM)) {

		printf(" ");

		if (PRINT_FIELD(SYMOFFSET))

			symbol__fprintf_symname_offs(al.sym, &al, stdout);

		else

			symbol__fprintf_symname(al.sym, stdout);

	}
@@ -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"),

tools/perf/util/session.c

+6 −2
Original line number Diff line number Diff line
@@ -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;
@@ -1340,6 +1340,10 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, 
		printf("%16" PRIx64, sample->ip);

		if (print_sym) {

			printf(" ");

			if (print_symoffset)

				symbol__fprintf_symname_offs(al.sym, &al,

							     stdout);

			else

				symbol__fprintf_symname(al.sym, stdout);

		}

tools/perf/util/session.h

+1 −1
Original line number Diff line number Diff line
@@ -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);

tools/perf/util/symbol.c

+17 −7
Original line number Diff line number Diff line
@@ -263,16 +263,26 @@ static size_t symbol__fprintf(struct symbol *sym, FILE *fp) 
		       sym->name);

}



size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp)

size_t symbol__fprintf_symname_offs(const struct symbol *sym,

				    const struct addr_location *al, FILE *fp)

{

	const char *symname;

	unsigned long offset;

	size_t length;



	if (sym && sym->name)

		symname = sym->name;

	else

		symname = "[unknown]";

	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]");

}



	return fprintf(fp, "%s", symname);

size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp)

{

	return symbol__fprintf_symname_offs(sym, NULL, fp);

}



void dso__set_long_name(struct dso *dso, char *name)

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