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>

4 files changed, 26 insertions, 10 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index e5334a97653..552c1c50eea 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_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) {
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 37bc38381fb..c8d90178e7d 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_symoffset);
 
 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 b580fa82911..fc6e12fe4b4 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -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)
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index d349c7a00b0..ba909c9970e 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);
+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);